• 专利附录
  • 专利说明
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  • 类似技术
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    • 专利摘要:
    Machine for the formation of boxes with edges located in the upper part of the side walls of the same and folded towards the outside of said boxes. The machine (100) comprises a male (15, 60, 80) in the shape of an inverted truncated pyramid movable linearly inside a mold (50), and this mold (50), equipped with articulated presses (46) and stops (56), provided with respective side support faces (C1, C4), movable between respective retracted and stop and/or pressure positions, to form boxes (B) and allow them to pass through an outlet mouth opposite an inlet mouth plate (P), and the forming stops (56) also having flat flange faces (58, 59) that in their stop position receive the pressure of the flanges (R) bent by male benders (64a). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2851679A1
    申请号:ES202130199
    申请日:2021-03-05
    公开日:2021-09-08
    发明作者:Olmos Telesforo Gonzalez
    申请人:Telesforo Gonzalez Maquinaria SL；
    IPC主号:
    专利说明:

    [0003] TOP OF THE SIDE WALLS OF THE SAME AND BENDED
    [0005] TECHNICAL SECTOR
    [0007] The present invention concerns a machine for the formation of boxes with flanges located in the upper part of the side walls of the same and bent towards the outside of said boxes.
    [0009] The term "sheet material" is used to designate corrugated cardboard sheet, compact cardboard sheet, a combination of these, and the like, which have weakened lines made to facilitate boxing by folding said weakened lines.
    [0011] BACKGROUND OF THE INVENTION AND TECHNICAL PROBLEM TO BE SOLVED
    [0013] Documents GB1490301A and CA1121199A disclose respective methods and machines for the formation of trays from sheets of paper or cardboard covered with a plastic sheet, which comprise a rectangular bottom, four walls facing two by two with a convergent inclination towards their bottom, each one connected to one side of the bottom, and reinforcing flaps associated with each corner of the bottom. Each wall is adhesively bonded to its two adjoining walls by said reinforcing flaps. Each side wall has outer ridges folded out of the box, which are joined to one another to form a continuous peripheral rectangular rim.
    [0014] Document US2925758A shows a machine for forming containers from metal sheets or similar combinations, where the material, once folded, maintains its folded position. Such a machine is not suitable for the production of cardboard or plastic boxes and trays, since metallic materials have memory upon bending, and therefore a cardboard and / or plastic material needs to be kept in the folded position for a time until the adhesive joins parts of the box to others.
    [0016] For the formation of said trays with outer edges, document GB1490301A proposes a male element and a female element or mold, facing each other, between which a plate is initially placed. The male inserts the plate into the mold through an upper mouth to bend some parts of the plate with others. Once the box is formed, it is extracted again through the upper mouth by means of a lifting plate that moves the bottom of the box from a position inserted in the mold to a raised position on the mold. The mold is configured to insert and extract only boxes through its upper mouth as it is a blind bottom mold mounted on a frame of a chassis. To finish the extraction of the box, a device F transports the boxes individually from the raised position to a lateral position on another conveyor G. These folding and extraction operations are complex and time consuming.
    [0018] A drawback of GB1490301A and US2925758A is that the number of boxes formed in a period of time is very low, which increases the unit cost of forming said boxes. First in both cases, after bending the box, you must wait some time with the box inserted in the mold so that the adhesive on the walls and edges dries, and another added time so that the complex operation of extraction of the the formed tray of the mold. This causes the plate to have a stop point in the production cycle, stopping the plates fed to said mold and core.
    [0020] Another drawback of document GB1490301A is that the adhesive is obtained by blowing hot air over certain areas of a plate stopped in a position on a conveyor, melting the hot-melt coating to join some parts of the plate with others. This causes the plate to have a second stop point in the production cycle, further stopping all plates transported to the air heater.
    [0022] Another drawback of document GB1490301A is the excessive number of conveyor devices, B, D and F, due to the double stop of each plate in each cycle, which adds an extra cost, complexity, and excessive floor space, which increases the cost. unit of formation of said boxes.
    [0024] To increase the speed of formation of these trays, document CA1121199A proposes to position on the mold and under the core a plate with adhesive applied on the reinforcing flaps. The male in its introduction into the mold cavity through the entrance mouth forms the bottom, the side walls and adheres the walls against the reinforcement flaps. After this and during this introduction, the outer flanges are formed sequentially in pairs, by means of upper benders mounted on the core and negative pressure holes made in the core that retain the side walls during the formation of the side walls and during the folding of the outer edges towards the outside of the box. This folding is done beyond the horizontal, parallel to the bottom of the box, to compensate for the memory of the cardboard. When the male reaches the position of maximum introduction, the tray is nested with the previously formed trays, forming a stack through a mold exit mouth. vertically aligned with the male and the entry mouth. This is considered the closest antecedent.
    [0026] A drawback of document CA1121199A is that the speed of the forming machine is restricted to the speed with which the tap oscillates between said maximum extraction and insertion positions of its Fig. 3, and precisely the tap must make a long vertical travel between the positions of maximum extraction and maximum insertion shown in Fig. 3 to be able to perform all the folding operations of the box from its flat plate according to the vertical. In addition, the stack of nested boxes is also vertical and is located just below the mold.
    [0028] First, this long vertical path of document CA1121199A limits the speed of formation of the boxes, since with the core inserted into the long vertical cavity of the mold, no other plate can be positioned between the core and the mold to carry out the next cycle of bending and ejection.
    [0030] Second, the negative pressure holes support the side walls during the bending of the outer flanges, which is a critical operation and with low reliability, even more so considering the several million cycles to which these machines are subjected. Thus, this causes constant production stops of the machine, which reduces its production speed.
    [0032] Third, the long vertical travel of the male causes the height measurement of the machine to be excessive even for the formation of boxes of low height, although the width and length of the machine can be relatively small, which leads to problems in transportation and installation of said machine.
    [0034] Fourth, the CA1121199A machine comprises an excessive number of elements, and furthermore these are of considerable dimensions, such as two vertical supports with cam followers connected to respective drive bars, four pinions and four racks, excessively elongated molding cavity, between many others, which add an extra cost, complexity, and contribute to said excessive measure in height of the machine, increasing the unit cost of forming said boxes.
    [0036] It would be desirable to obtain a machine with a higher forming speed for the formation of boxes with flanges located on the upper part of the side walls of the same and bent towards the outside of said boxes.
    [0038] Furthermore, it would be desirable, at the same time, to maintain or reduce the measurements of said machine and associated costs necessary for its formation.
    [0039] Speed is an essential factor in these machines, and can reach values of several thousand or even tens of thousands of boxes formed per hour.
    [0041] EXPLANATION OF THE INVENTION
    [0043] According to a first aspect, to solve the drawbacks set forth in the previous section, the present invention presents a machine for the formation of boxes with flanges located in the upper part of the side walls thereof and bent towards the outside of said boxes, comprising said machine: a chassis, a mold, a male drive, and a male.
    [0045] Said mold is supported on said chassis and comprises a cavity corresponding to the shape of the box to be formed and in which a male is insertable, a plate entrance mouth to said cavity and an exit mouth of said formed box cavity, mutually facing each other. according to a Z direction, and benders arranged around said cavity.
    [0047] Said male drive is supported on said chassis, and configured to move said male linearly in a guided manner according to said Z direction in opposite directions, between a position of maximum extraction where said male is outside said cavity, and a position of maximum insertion wherein said male is inside said cavity.
    [0049] The tap drive may comprise a crank-rod type mechanism driven by a rotating electric motor, a linear fluid-dynamic cylinder usually provided with a plunger or piston and a body, a rack and pinion type mechanism, or a mechanism comprising a driven spindle. by means of an actuator, among others.
    [0051] Said male is supported on a connection support of said male drive. Said core is aligned with said mold in a Z direction, and is essentially in the shape of an inverted truncated pyramid.
    [0053] Said core comprises a front side and a rear side according to the direction of introduction of the core into the mold, and four flat side sides arranged mutually facing two by two around an arm of the core drive, each of which forms an inclined angle with respect to said Z direction.
    [0055] These inclinations with respect to the linear direction Z, allow to form boxes with inclined side walls with respective inclinations greater than 90 degrees with respect to the bottom so that boxes formed within others can be nested (inserted). By way of illustration, said angle may be between 92 and 105 degrees, thus forming each one of the flat lateral sides of the male an inclination of between 2 to 15 degrees with respect to the linear direction Z.
    [0057] The four flat lateral sides define four corner areas of the core, and the front and rear sides according to the direction of introduction of the core into the mold.
    [0059] Said front side comprises a flat bottom surface configured to press a bottom portion of a plate positioned in said inlet mouth and insert it into the cavity. It will be understood that the flat bottom surface of the core may be a continuous flat surface, a flat frame, or a plurality of coplanar partial surfaces inscribed within the area defined by the flat bottom surface.
    [0061] On said rear side, four male benders are mounted, facing each other in pairs, one associated with each of the flat lateral sides, and configured to protrude outwards with respect to said flat lateral sides and bend outward four flanges located at the ends. top of the side walls of the box.
    [0063] According to this first aspect, the present invention also proposes in combination, in a way per se not known from the existing state of the art, a series of elements and characteristics that are listed below.
    [0065] In said machine, said mold further comprises stops, mutually facing each other, and arranged around the cavity. Each of said stops can be activated by means of one or more stop actuators, between a retracted position adjacent to the cavity where it does not interfere with the box to be formed, and a stop position where one or more flat flange faces of each of said stops are configured to be located adjacent to the fold lines that connect the outer ridges with the side walls of the box. Said one or more flat nose faces are configured in said abutment position to receive pressure from the outer flanges upon their bending outward by the tap benders.
    [0067] Among others, this invention expressly covers the following possibilities: a mold with two stops with a flat nose face each stop, a mold with four stops with a flat nose face each stop, a mold with four stops with two flat nose faces each stop in where said two flat nose faces are movable by means of a single actuator, and a mold with four stops with two flat nose faces each stop where each flat nose face is movable by means of a respective stop actuator.
    [0069] In said machine, said core benders are configured to press the overlapping portions of said outer flanges against said one or more flat flange faces in their abutment position with the core inserted into the box at the position of maximum introduction. Also, said male benders are configured to glue outer flanges to each other in their overlapping portions by means of glue dots or beads.
    [0071] In said machine, the movement of the stops from their stop position to their retracted position allows the boxes formed to pass through said outlet mouth.
    [0073] By means of the present invention, the travel of the male between the positions of maximum insertion and extraction is shortened, while all the bending and pressing operations of the box from the flat plate are carried out between said positions of the male, thus increasing the formation speed.
    [0075] Furthermore, in the present invention, the bending and pressing operation of the outer edges is performed with greater reliability, which avoids productive stoppages and maintains a high forming speed, compared to the state of the art that uses more critical and failure-prone operations. / productive stop.
    [0077] Also, in the machine of the present invention:
    [0079] • the mold also comprises at least six lateral support faces, movable between respective retracted positions adjacent to the cavity and respective abutment positions towards the interior of the cavity, arranged laterally around the cavity, each one having an inclination with respect to the cavity. linear direction Z complementary to that of each of the flat lateral sides of the male, the at least six lateral flange faces state in their stop positions configured to press the outer part of the box, this outer part including the corner areas of the itself, against the four flat lateral sides of the male towards the interior of the cavity;
    [0081] • with two lateral flange faces of these six integrated, each one in a respective stop, and the other four lateral flange faces of these six integrated, each one in a respective mold press,
    [0082] • these four presses being mutually facing each other in pairs, and arranged laterally around the cavity, each press being articulated in a respective press articulation with respect to the lateral support faces integrated in the shaping stops, and
    [0083] • these presses being movable, between a retracted position, towards the outside of the cavity, and a pressure position, towards the inside of the cavity where they are dimensioned and positioned to bend and press the outside of the box in two opposite side walls against respective opposite flat side sides of the core.
    [0085] Thus, advantageously in the present invention, the lateral flange faces and flat flange faces, in cooperation with the core, advantageously carry out a high number of forming operations to transform the flat plate into a box, in a minimum interval of time, which can being associated with the simultaneous movement of these faces you will suffer towards the interior of the cavity, reducing the time necessary with the male in the position of maximum introduction for the formation of the box, all of this leading to a productive increase in boxes.
    [0087] Also advantageously, said at least six side support faces are configured, dimensioned and positioned, to press the outside of the box towards the inside of the cavity, giving stability and centering to the bottom, side walls and corner areas of the box, preferably during the subsequent joining of the outer flanges at the overlapping portions. This is especially advantageous in overcoming the drawbacks associated with the precise positioning of the flanges in the overlapping portions, which are of extremely small dimensions.
    [0089] Thus, the stops and presses with the lateral support faces integrated therein, are configured to, during their movement from the retracted position to the stop and / or pressure position, and in cooperation with the male, carry out the following operations :
    [0091] • positioning of two alternate side walls with respect to the bottom fold lines to a final forming position in the box,
    [0092] • pressure of the same against respective lateral sides of the male,
    [0093] • folding and final positioning in the box of two lateral flaps derived from each one of them,
    [0094] • shaping the corner areas of the box, preferably including the bending of chamfered faces of the corner areas of the box and pressing them against respective chamfers of the male,
    [0095] • the bending of the outer flanges, and
    [0096] • pressure by contact and sticking of the overlapping portions of the flanges.
    [0097] This high number of forming operations can be produced by respective simultaneous movements of the stops, again contributing to considerably reduce the time necessary with the core in the position of maximum introduction for the formation of the box, thus increasing the number of boxes produced in a certain time interval.
    [0099] From this point, the machine is capable of forming boxes of different shapes: four, eight or twelve lateral faces surrounding the bottom of the same, with a high number of boxes formed per time interval, since the increasing number of faces The sides do not appreciably affect the high rate of formation achieved by the present invention.
    [0100] Preferably, each press and / or stop has a plurality of side nose faces integrated, including at least two to seven side nose faces.
    [0102] This number of side end faces depends on:
    [0104] • the number of side faces of the box to be formed,
    [0105] • whether or not the box to be formed includes corner areas with one or two chamfers, and • the optional bending of the side flaps attached to some of the side walls by means of optional molding edges integrated into the forming stops and integrated male edges in the corner areas of the male.
    [0107] In the present invention, with the construction of the articulated side support faces integrated in the presses, the machine increases its speed since the bending and pressing operations of two opposite side walls of the box are carried out effectively and quickly during movement. presses, without introducing additional delay times.
    [0109] Preferably, these presses are movable relative to the respective press joints, more preferably essentially vertical, by respective press actuators supported on a movable part of the stopper actuator of each forming stop. The movable part of the forming stopper is movable between a retracted position towards the outside of the cavity and a pressure position towards the inside of the cavity.
    [0111] In this preferred option, thanks to the mounting of the press actuators in the movable part of the stop actuator, the presses and press actuators, in their combined movement with the shaping stops, advantageously bring their force points closer to the areas of the box destined to be bent and pressed, and advantageously move away together with the forming stops, allowing the formed box to pass through the outlet mouth of the mold, all resulting in a high speed of box formation.
    [0113] Preferably, each press is hinged by respective press hinges to respective lateral ends of the lateral support faces integrated in the shaping stops.
    [0114] Preferably, the movable part of an actuator can be embodied in the movable stem of an actuator of the fluid dynamic cylinder type, for example, a pneumatic cylinder, or in a rotating shaft of an actuator of the electric motor type, among other options.
    [0116] In a preferred option, the flat nose faces, and the side nose faces of stops and presses, are configured to be locked in the stop position.
    [0118] The said immobilization confers rigidity to the flat end faces while they are positioned in the stop positions exerting pressure against the tap benders. The immobilization can correspond to a mechanical immobilization, for example, corresponding to the edges of the thread of a threaded rod or spindle; to immobilization by means of an electrical control and / or power signal associated with an actuator, for example, a motor brake; to an immobilization of the axis of rotation of a rotary motor; or to an immobilization of the movable part of a fluid dynamic cylinder in that position associated with the pressure and force of a fluid such as air or oil, among others.
    [0120] More preferably, each press actuator is a pneumatic press cylinder, and each stopper actuator is a pneumatic stopper cylinder.
    [0122] In a preferred variant, the mold comprises four shaping stops, each one integrated with a lateral support face and a press integrated with a lateral support face articulated by means of respective press joints with respect to the lateral support faces integrated in the forming stops, and preferably articulated. at the ends of these.
    [0124] Preferably, the mold benders comprise a plurality of first and second benders.
    [0126] Preferably, the mold benders are integrated into the stops.
    [0128] Preferably, a guiding device is associated with said mold, provided with two mutually facing box guides, configured to guide the boxes formed through said outlet mouth. Said guiding device may or may not be an integral part of the mold. The boxes can pass through said outlet mouth in a nested arrangement, one with the other, forming a stack of boxes.
    [0130] Preferably, in said machine, the Z direction corresponds to the vertical, with the male and the mold being aligned according to the vertical, and said inlet and outlet openings being mutually aligned according to the vertical, so that said guiding device is configured so that the boxes come out below the outlet mouth.
    [0132] Furthermore, said machine comprises a conveyor supported on the chassis, equipped with two horizontal plate guides configured to be one on each side of the plate to be transported from an initial position towards its positioning in the entrance mouth. Also, said machine comprises a plurality of glue injectors, supported on the chassis and suspended on said guides, configured to deposit dots or strands of glue on the plate during its transport.
    [0134] This arrangement proposes applying glue on the flat plate at a high speed, thanks to the horizontal guidance of the plate and the glue injectors that precisely deposit the glue even if the speed increases, and even more so in this case where the portions overlap of said outer edges are very low.
    [0136] Linked to the previous horizontal transport of the plate, this arrangement proposes a vertical displacement of the male, which clearly simplifies the extraction of the box formed through the outlet mouth, aided in any case by gravity. Again, the speed increases since it is not necessary to have an activatable device, associated with a delay time, which must eject the box formed out of the mold cavity, passing through the outlet mouth.
    [0138] In both operations, application of glue and exit of formed box, the machine is configured to execute them without plate or box stops throughout the production cycle, increasing its speed.
    [0140] Preferably, said flat end faces of each of said stops are horizontal and said tap benders are configured to horizontally press the overlapping portions of said outer flanges against said flat end faces.
    [0142] Since the bending of the flanges is carried out only up to the horizontal, and not beyond the horizontal as proposed by the state of the art, it takes less time to bend, and it maintains a short vertical travel of the male, increasing the cyclical speed of the machine. This increase is plausible because, although the outer edges recover memory, later said edges can remain straight by bending them again in a later phase of sealing or placing a laminar coating on the upper mouth of the box.
    [0144] Complementarily, each stop has also integrated a horizontal bending edge adjacent to the flat end face, configured to bend each edge outwards around the bending line of the flange, and to be positioned in the abutment position adjacent to the bending line. of flange during the pressure of the side end faces of the stops and the presses against the outside of the box.
    [0145] Preferably, the at least four side end faces of the mold include respective pressure surfaces of essentially coincident dimensions with each of the counter pressure surfaces of the flat side sides of the core.
    [0147] This helps to position and maintain the side walls of the box in their predefined bent position with the tap in the position of maximum insertion, and therefore to correctly position the flange fold lines in their predefined position to be able to undertake the subsequent bending of the outer flanges reliably and quickly.
    [0149] Optionally, the mold comprises molding edges defined by the lateral end faces, and includes respective edge portions of essentially coincident lengths with each of the core edges positioned and included in the core corner areas.
    [0151] These optional core and molding edges allow for increased forming speed via efficient bending of the flaps that also occurs during movement of the stops from the retracted position to the stop position.
    [0153] Preferably, the side end faces and core corner areas defined by flat side sides of the core are machined on nylon blocks.
    [0155] Advantageously, this achieves a precise positioning of the lateral support faces and / or the molding and core edges in the stop position, allowing the speed of movement of the core to be increased in the linear direction without experiencing frequent production stops and subsequent bending and joining. of the flanges reliably and quickly.
    [0157] In a preferred option, the four male benders are part of a male bender device, which also comprises four angled male benders, distributed around the connection support, each one of them positioned in a corner area of the male interleaved. between two contiguous male benders, and positioned in use in a protruding position towards the exterior of the male in the corner area thereof defined by the four flat lateral sides.
    [0159] The four angled male benders are configured to, with the male positioned in the maximum insertion position, pressing superiorly by contact the overlapping portions of the flanges located in the corner areas of the box and previously bent towards the outside of the box. . Additionally, the four corner male benders are configured to glue these flanges against each other by pressure in these overlapping portions, by means of glue points or beads.
    [0160] This preferred option proposes that, for the union of the outer flanges with others in the overlapping portions of these, it is not enough only to bend the flanges in the non-overlapping areas outwards by means of the male benders so that the outer flange portions of the plate are weakly pressed against each other at the corner overlapping portions of the box. But, in addition, it is necessary that the angled male benders of the male bender device be configured, dimensioned and positioned to press superiorly by contacting the portion of the upper outer flange located above the lower flange portion in the overlapping zone of the flanges.
    [0162] This preferred option proposes a solution to the difficult formation of the flanges thanks to the fact that it is possible to have a previous precise control of the positioning of the flange portions that make up the overlapping area by means of the male benders, to carry out a subsequent pressing and gluing. in the overlapping portions by the angled male benders.
    [0164] Also, the fact that the core is in the maximum insertion position during the aforementioned contact pressure of the angled core benders contributes to increasing the reliability in the formation of the outer flanges and, ultimately, to maintaining a high speed of production exempt from frequent production stops.
    [0166] When the tap is in use in the position of maximum insertion, the bottom of the box is stopped thus increasing the stability and centering of the partially formed box, and allows to increase the linear speed of the core without inconvenient bending and faulty gluing of the pins. outer flanges.
    [0168] Preferably, the angled core benders are configured to press against the shaping stops in the stop position.
    [0170] Thus, for contact pressure bonding and gluing in the overlapping portions, it is also necessary to exert pressure against the forming stops, providing a sandwich-like upper and lower pressure on the overlapping portions of the box flanges.
    [0172] Preferably, in the machine, the mold additionally comprises two shaping stops each provided with a flat end face. Thus, the total number of shaping stops is at least four.
    [0174] Continuing in this preferred embodiment, the eight male benders of the device Core benders are separated, with the core in the inserted position and the core benders in the protruding position in use, two different distances from the flat end faces of the forming stops. A first distance is associated with the thickness of the plate positioned along the flanges at the portions of the flanges where they do not overlap each other. The second distance is associated with twice the plate thickness associated with the overlapping portions.
    [0176] With this double distance, the male bending device and the flat end faces of the forming stops press the flanges in the overlapping portions, superiorly and inferiorly, by contact, making a sandwich effect that strengthens the bonding by gluing in the mentioned overlapping portions. , while providing a solution compatible with a high speed of formation.
    [0178] Optionally, the male comprises an ejector device integrated in the flat bottom surface of the male, the ejector device being configured to facilitate the removal of the male from the formed box, thus solving the fact that the bonding glue applied to the flanges of the box tends to join the box flanges to the male benders and / or angled male benders during the pressure of these against the flanges and the flat end faces, thus avoiding frequent and / or permanent productive stoppages.
    [0179] For those skilled in the art, other objects, advantages and characteristics of the invention will emerge in part from the description and in part from the practice of the invention. The present invention covers all possible combinations of particular and preferred embodiments indicated herein. The claims referring to said machine have been expressly drawn up so that, in the event of a possible infringement of the present invention, it can be verified whether said machine is in operation or stopped, and although the boxes that are configured to form are not physically located at the time of the inspection.
    [0181] BRIEF DESCRIPTION OF THE DRAWINGS
    [0183] The foregoing and other advantages and characteristics will be more fully understood from the following detailed relationships of exemplary embodiments with reference to the accompanying drawings, which should be taken by way of illustration and not limitation, in which:
    [0185] Fig. 1 is a top perspective view of an embodiment of the machine of the present invention, with the male in the position of maximum extraction, and the shaping stops in the retracted position, and a flat plate located between the male and the entrance mouth on the plate guides;
    [0186] Fig. 2 is a plan view of a slab having glue beads deposited by the forming machine of the present invention for subsequent formation in the box of Fig. 5;
    [0188] Figs. 3, 4, and 5 are respective top perspective views of boxes suitable to be formed by the machine of the present invention, where the two side flaps derived from each of the two side walls are folded outside the box, which they have ridges located at the top of the outwardly bent sidewalls, and where in Figs. 3 and 4 the parts of the box have been rendered artificially transparent to show the glue beads applied by the machine;
    [0189] Fig. 6 is a top perspective view corresponding to Fig. 1, but where elements have been omitted, to show in detail a tap with two chamfers in each of its corner areas, and the tap bender device;
    [0191] Figs. 7 and 8 are views of the male of Fig. 6 in bottom perspective and in plan, respectively;
    [0193] Fig. 9 is a plan view of the mold of the machine, according to a first embodiment of the present invention, where both the four stops and the presses are in their retracted positions;
    [0195] Fig. 10 is a plan view of the mold of Fig. 9, where both the stops and the presses are in their stop and / or pressure positions, and where the forming stops aligned with the longitudinal direction X have been omitted;
    [0197] Fig. 11 is a plan view of the male corresponding to the mold of Figs. 9 and 10, for the formation of the box of Fig. 3, and wherein the forming stops aligned with the longitudinal direction Y have been omitted;
    [0199] Figs. 12 through 14 are respective plan views of the core and core bender according to three alternative embodiments;
    [0201] Fig. 15 is a top perspective view of another embodiment of the machine, provided with two forming stations, with both cores in the position of maximum extraction, and a formed box located in the mold cavity of one of the stations;
    [0203] Figs. 16, 17, and 18 are respective top perspective views of boxes suitable to be formed with the machine of Fig. 15, where the two side flaps derived from each of the two side walls are folded inside the box, having ridges located on the inside of the side walls and bent outwards, and where in Figs. 16 and 17 the parts of the box have been rendered artificially transparent to show the glue beads applied by the machine;
    [0205] Figs. 19 and 20 are views of an alternative male to that of Fig. 15, showing the retracted positions and protrusion positions, respectively, of four male benders of the male device; and
    [0207] Figs. 21 and 22 are sectional views of another alternate tap embodiment, showing the retracted positions and protrusion positions, respectively, of four tap benders of the tap device.
    [0209] DETAILED EXHIBITION OF A PREFERRED EXAMPLES OF REALIZATION
    [0211] According to the present invention, reference 100 designates a machine (100) for forming boxes (B), according to the embodiment shown in Figs. 1, 9, 10 and 11.
    [0213] Figs. 3 to 5 show boxes (B) of different shapes intended to be formed in the machine (100) of the present invention, from a plate (P), such as, for example, the one shown in Fig. 2.
    [0215] These boxes (B) are intended to be nested with each other, since their side walls (PL) form slight inclinations with respect to the direction perpendicular to the bottom (F) of the box (B), so that the mouth uppermost open thereof has longitudinal and transverse dimensions greater than those of the bottom (F).
    [0217] Said boxes (B) are provided with four edges (R) that arise from the upper part of each of the four side walls (PL) and are bent towards the outside of the box (B).
    [0219] The edges (R) of the figures are flat and horizontal, forming a flat frame with a continuous and peripheral edge at the top of the side walls (PL) and parallel to the bottom plane of the box (B).
    [0221] Said machine (100) comprises a chassis (1), a mold (50), a male drive (10), and a reference male 15 in this embodiment, according to which the machine (100) forms the boxes (B ) of Fig. 5 from the plate of Fig. 2.
    [0223] The mold (50) is supported on the chassis (1) and comprises a cavity (52) corresponding to the box to be formed and where a male (15, 60, 80) is insertable, a plate entrance mouth to said cavity (52) and an outlet mouth of said box cavity (52) formed, mutually facing according to a direction (Z), and benders arranged around said cavity (52) integrated in stops (56) which will be described in detail later.
    [0225] In Figs. 1, 9, 10 and 11, the mold (50) includes means for regulating said cavity (52) to adapt to the length and width of the box (B) in two directions, longitudinal (X) and transverse (Y), of independently.
    [0227] Throughout the embodiments, the longitudinal and transverse horizontal directions (X, Y) generally designate two mutually perpendicular linear horizontal directions.
    [0228] These adjustment means include two spindles (2) supported on the chassis (1) aligned according to the longitudinal direction (X) to adapt the cavity (52) according to the longitudinal direction (X), and four flanges (3) supported in pairs in two transverse bars (4) supported on the longitudinal spindles (2), to adapt the cavity according to the transverse direction (Y).
    [0230] The two spindles (2) are mutually coupled to rotate synchronously by means of pinions (5) and a chain (6). The shaping stops (56) and the rest of the movable elements are supported directly or indirectly on said transverse bars (4) through respective supports (21).
    [0232] Prior to the positioning of the plate (P) in its final transport position centered between the male (15) and the cavity (52), it is transported by a conveyor equipped with two plate guides (40) and pushed by a conveyor member from an initial position associated with a stacked sheet magazine (not shown), to said final position of Fig. 1, passing under a plurality of glue injectors (45) (shown in Fig. 15) that are supported on the chassis (1) and suspended on the conveyor.
    [0234] The glue injectors (45) deposit points or beads of glue (CC) parallel to each other on predefined areas of the plate (P), as indicated in Fig. 2.
    [0236] Thus, Fig. 2 shows that for the formation of the box (B) of Fig. 5, glue cords (CC) deposited on each of the four lateral flaps (SL) derived on both sides of two mutually facing side walls (PL).
    [0238] Said tail cords (CC) of the side flaps (SL) remain parallel to the bottom plane (F) of the box (B) once it is formed, as can be deduced from Figs. 2 to 5.
    [0239] At least one of these points or tail chords (CC) extends over a chamfered face (CH) of the future corner area (A) of the box (B) to glue the reinforcement flaps (SR) that originate from both flange sides (R) of the other two side walls (PL).
    [0241] Glue points or cords (CC) deposited on four portions of the flanges (R) are also necessary to bond the flanges (R) with each other in the overlapping areas (A).
    [0243] After depositing the glue cords (CC) by means of the glue injectors (45), the plate (P) is positioned in the final transport position of Fig. 1.
    [0245] The male drive (10) is configured to move said male (15, 60, 80) linearly in a guided manner according to said direction (Z) in opposite directions, between a position of maximum extraction where said male (15, 60, 80 ) is outside said cavity (52), and a position of maximum introduction where said tap (15, 60, 80) is inside said cavity (52).
    [0247] The male drive (10) supported on the chassis (1) moves the male (15, 60, 80) guided in the linear direction (Z) towards the insertion position of the male (15, 60, 80) in the cavity ( 52), dragging the plate (P) into the cavity (52) of the mold (50). The tap drive (10) comprises an arm moved by a motor member (not shown).
    [0249] Said male (15) is supported on a connection support (11) to the male drive (10). The male (15) is aligned with said mold (50) according to a direction (Z), and is essentially in the shape of an inverted truncated pyramid, comprising four flat lateral sides (62) arranged facing two by two around the arm and the connection support (11) forming respective inclinations with respect to the vertical linear direction (Z), defining the four flat lateral sides (62), four corner areas of the male (15, 60, 80) between two contiguous flat lateral sides (62), and a front and rear side (61, 63) according to the direction of insertion of the core (15, 60, 80) in the mold (50).
    [0251] Fig. 7 shows that the front side (61) comprises a flat bottom surface (65) integrated in the male (15, 60, 85) configured to press a bottom portion of a plate (P) positioned in the mouth of inlet and insert it into the cavity (52).
    [0253] In Figs. 6 to 8 and 11 to 14, on said rear side (63) four male benders (64) are mounted, facing each other in pairs, one associated with each of the lateral sides flat (62), and configured to protrude outwards with respect to said flat lateral sides (62) and bend outwards four flanges (R) located at the upper ends of the side walls (PL) of the box (B).
    [0255] In Figs. 6 to 8 and 11 to 14, the four male benders (64) form part of a male bender device, which further comprises four angled male benders (64b), distributed around the connection support (11).
    [0257] Each corner male bender (64b) is positioned in a corner area of the male (15) sandwiched between two contiguous male benders (64), and positioned in use in a protruding position towards the outside of the male (15) in the corner area of the same defined by the four flat lateral sides (62).
    [0259] The four angled male benders (64b) are configured to, with the male (15) positioned in the maximum insertion position, pressing superiorly by contacting the overlapping portions (A) of the flanges (R) located in the corner areas. of the box (B) and previously bent towards the outside of the same, and glue these edges (R) against others by pressure in these overlapping portions (A), by means of points or glue beads (CC).
    [0261] Figs. 6 to 8 show that the male bender device comprises eight male benders (64, 64b) embodied in respective eight individual pieces screwed by means of two respective screws (not referenced) each to a male core made of cast nylon provided with said four flat lateral sides (62), which delimit four male corner areas (15) that include two chamfers (62a) each, forming a male (15) provided with twelve inclined faces corresponding to the interior shape of the side walls ( PL) and chamfered faces (CH) of the box (B) to be formed from Fig. 5.
    [0263] In Figs. 6 to 8, the core (15) has three core edges (A60) in each of the corner areas thereof, which delimit two chamfers (62a) and the side end walls (62) adjoining them.
    [0265] In Figs. 10 and 11, the angled core benders (64b) are configured to press against the four shaping stops (56) in the stop position.
    [0267] Fig. 12 shows a first alternative embodiment of the male bender device, wherein the four male benders (64) are embodied in a single piece, while the four angled male benders (64b) are embodied in respective individual pieces.
    [0269] Fig. 13 shows a second alternative embodiment of the male bender device, wherein two of the male benders (64) have at both of their longitudinal ends extensions corresponding to the angled male benders (64b). In an alternative option not shown in the figures, the four corner forming members may emerge one from one end of each of the four male benders (64).
    [0271] Fig. 14 shows a third alternative embodiment of the core bender device, wherein all of the core benders (64) and corner core benders (64b) are integrated in a single piece.
    [0273] Alternatively, the forming members of the core bender device may be machined on the same core core that integrates the flat lateral sides (62).
    [0274] Fig. 11 shows an embodiment of the core bender device, now mounted on the rear side (63) of a core with four flat lateral sides (62) without chamfers (62a) in the corner areas of the core (15).
    [0276] The first embodiment of the machine (100) for the formation of boxes (B) with four side walls (PL) of Fig. 3 is obtained by the combination resulting from replacing the male (15) of Fig. 1 with the male (15) of Fig. 11.
    [0278] Following in this first embodiment of the machine (100), Figs. 1, 9, 10 and 11 show that the mold (50) of this comprises four shaping stops (56), mutually facing each other and arranged laterally around the cavity (52).
    [0280] Each forming stop (56) can be activated by means of a respective stop actuator (36), between the retracted position of Fig. 9, to insert the plate to be formed in the cavity (52) and where they do not interfere with the box (B ) to be formed from the plate (P), and the stop position of Fig. 10, towards the interior of the cavity (52), allowing the movement of the stops (56) movable between the stop and retracted positions to evacuate each box (B) formed from the cavity (52) passing through the outlet mouth without interfering with the stops (56).
    [0282] Each of the shaping stops (56) includes a flat end face (58, 59), configured to, in its stop position of Fig. 10, be immobilized and located inferiorly adjacent to a position tap bender (64). outstanding.
    [0284] The flat end face (58, 59) of each of the shaping stops (56) is configured to be adjacent to a respective lip fold line (LR) that connects one of the outer ridges (R) with the top of a side wall (PL) of the box (B).
    [0286] In the stop position, the flat end face (58, 59) of each of the stops (56) Formers is further configured to receive pressure from the lips (R) bent outward by the tap benders (64), with the tap (15) in the maximum insertion position (not shown).
    [0288] With the tap (15) of Fig. 11 positioned in the position of maximum insertion within the cavity (52) of Fig. 10, the four angled tap benders (64b) are configured to press superiorly by contacting portions of overlap (A) of said edges (R) bent outwards and located in the corner areas of the box (B), against the flat end faces (58, 59) in their stop position.
    [0290] By pressing superiorly in each corner area, the upper flange portion (R) presses down against the upper face of the lower flange portion (R) at the overlapping portion (A).
    [0292] During this pressure the four angled male benders (64b) are additionally configured to glue flanges (R) against each other by pressure in these overlapping portions (A), together with the points or glue beads (CC) previously deposited by means of the glue injectors (45).
    [0294] This mold (50) of Figs. 9 and 10 also comprise six lateral support faces (C1, C4), movable between a retracted position adjacent to the cavity (52) of Fig. 9 and some stop and / or pressure positions of Fig. 10 towards the interior of the cavity (52), mutually facing each other in pairs, arranged laterally around the cavity (52).
    [0296] Each of the six lateral support faces (C1, C4) has a vertical inclination complementary to that of each of the flat lateral sides (62) of the male (15), the six lateral support faces (C1, C4) being in their stop and / or pressure positions of Fig. 10 configured to press the outside of the box (B) against the four flat lateral sides (62) of the plug (15) into the cavity (52).
    [0298] This outer part includes the corner areas of the same, against the four flat lateral sides (62) of the male (15) of Fig. 11 towards the interior of the cavity (52), during said pressing by contact and gluing of the four angled male benders (64b).
    [0300] In Figs. 9 and 10, two lateral flange faces (C4) of these six lateral flange faces (C1, C4) are integrated, each one in a respective forming stop (56), and the other four lateral flange faces (C1) of these six lateral end faces (C1, C4) are integrated, each one in a respective press (46) of the mold (50).
    [0301] In an alternative embodiment of the mold (50) of the machine (100) not shown, the number of lateral faces integrated in each press (46) and / or forming stop (56) is adapted to the formation of boxes of eight, twelve, or sixteen sides. In one example, two, three, or four side end faces (46) are integrated into each press (46) for the formation of these boxes in different ways.
    [0303] Returning to the first embodiment, in Figs. 9 and 10 these four presses (46) are mutually facing each other in pairs, and arranged laterally around the cavity (52). Each press (46) is articulated by respective vertical articulations (48) to each of four lateral ends of the two lateral support faces (C4) integrated in the shaping stops (56).
    [0305] These presses (46) are movable with respect to the respective joints (48) by means of respective press actuators, embodied in pneumatic press cylinders (47). The pneumatic press cylinders (47) are supported on a press support (23) in a movable part of the stopper actuator of each movable forming stop (56), corresponding with the stem (36b) of the stopper pneumatic cylinder actuator (36).
    [0307] On the side of its body, each pneumatic press cylinder (47) is supported on a press support (23) articulately thanks to an auxiliary vertical joint (49a). On the side of its rod (47b), each pneumatic press cylinder (47) is articulated to a respective press (46) thanks to a respective vertical secondary articulation (49).
    [0309] Thus, these presses (46) are movable between the retracted position of Fig. 9, towards the outside of the cavity (52), and the pressure position shown in Fig. 10, towards the inside of the cavity (52) .
    [0311] These presses (46) are dimensioned and positioned to bend and press in the pressure position the outer part of the box (B) on two opposite side walls (PL) against respective flat lateral sides (62) opposite of the male (15, 60 , 80), each pair of presses (46) being configured to bend and press a respective side wall (PL).
    [0312] In Fig. 10, the immobilization of each lateral support face (C4) of each forming stop (56) in the stop position, is thanks to the application of pressurized air on one of the two sides of the movable stem (36b) of a pneumatic cylinder, configured for this purpose.
    [0314] Similarly, in Fig. 10, the immobilization of each side flange face (C1) of each press (46) in the pressure position, is thanks to the application of pressurized air on one of the two sides of the rod (47b) movable pneumatic cylinder press (47), configured for this purpose.
    [0316] In Figs. 9 and 11, the mold (50) comprises two forming stops (56) aligned according to the longitudinal direction (X) have an upper end face (58) but lack side end faces (C1, C2, C3, C4). In Fig. 10 these shaping stops (56) have not been represented.
    [0318] The two forming stops (56) aligned in the transverse direction (Y) and the two forming stops (56) aligned in the longitudinal direction (X) move from their retracted position of Fig. 9 to the stop position of Fig. 10.
    [0320] In these stop positions, and with the presses (47) in the pressure position of Fig. 10, the male bending device (15) cooperates with the flat end faces (58, 59) of these four stops (56) Formers to bend and join flanges (R) with others.
    [0322] Preferably, the presses (46) are configured to move from their retracted positions to their pressure positions of Fig. 10 during movement of the forming stops (56) aligned in the direction (Y) and bearing of these presses (46) .
    [0324] Next, forming presses (46) and stops (56) are moved to their retracted positions to allow evacuation of the box (B) formed.
    [0326] Similarly to Figs. 9 and 10, in an alternative variant not shown, the mold (50) comprises four stops (56) that are shaping and aligned in pairs according to a linear direction, for example, according to the longitudinal (X) or transverse (Y) direction, each one integrated with a side strut face (C4). Additionally, the mold (50) comprises a press (46) integrated with a lateral support face (C1) articulated by means of respective joints (48) with respect to the lateral support faces (C4) integrated in the forming stops (56), and preferably articulated. at the ends of these.
    [0328] In Figs. 9 and 10, the mold (50) comprises molding edges (A50) defined by the lateral end faces (C1, C4), and include respective edge portions of essentially coincident lengths with each of the male edges (A60) positioned and included in the corner areas of the male (15, 60, 80).
    [0330] In Figs. 6 to 14, the lateral end faces (C1, C4) and the corner areas of the male (15, 60, 80) defined by flat lateral sides (62) of the male (15, 60, 80) are machined on nylon blocks .
    [0332] Fig. 7 shows that the male (15) comprises an ejector device (75) integrated in the flat bottom surface (65) of the male (15, 60, 80). The ejector device (75) is configured to facilitate the extraction of the core (15, 60, 80) from the box (B) formed. The Ejector device (75) is one or more vacuum cups.
    [0334] Returning to Fig. 11 of the first embodiment, it is shown that the corner core benders (64b) are configured to press against the forming stops (56) in the stop position.
    [0336] Figs. 9, 10 and 11 show that each of the four shaping stops (56) also has an integrated horizontal bending edge (AH) adjacent to the flat end face (58, 59), being four in total.
    [0338] Each of the horizontal bending edges (AH) is configured to bend around the lip fold line (LR) each lip (R) outward, in cooperation with a respective forming member (64, 64b) of the bending device. of male.
    [0340] In Figs. 9, 10 and 11 it is shown that each horizontal bending edge (AH) is configured to position itself in the abutment position adjacent to the lip bend line (LR) during the pressure of the lateral shoulder faces (C1, C4) of the stops (56) and presses (47) against the outside of the box (B).
    [0342] Two of the forming stops (56) mutually facing each other according to the longitudinal direction (X) have a flat and horizontal upper nose face (58) and the other two forming stops (56) mutually facing each other according to the transverse direction (Y) have a shoulder face top (59) flat and horizontal.
    [0344] In Fig. 11, the eight male benders (64, 64b) of the bender device are screwed fixedly mounted on the storage side (63) of the male (15) on said nylon core thereof.
    [0346] Each of the eight tap benders (64, 64b) is provided with a flat, horizontal pressure surface configured to exert pressure against the flat end faces (58, 59) of the shaper stops (56).
    [0348] In Figs. 9, 10 and 11, the eight male benders (64, 64b) of the male bender device are separated, with the male (15, 60, 80) in the inserted position and the forming members in the protrusion position in use, two different distances from the end faces (58, 59) of the forming stops (56).
    [0350] Along the two alternate ridges (R), mutually parallel, and aligned according to the longitudinal direction (X) in Fig. 11, a first distance is associated with the thickness of the plate (P) positioned along the ridges (R) in the portions of the flanges (R) of Fig. 3 where they do not overlap each other.
    [0352] Along the other two alternate ridges (R), mutually parallel, and aligned according to In the transverse direction (Y) of Fig. 11, a second distance is associated with twice the plate thickness (P) associated with the overlapping portions (A) of the box (B) of Fig. 3.
    [0354] Furthermore, in Figs. 9 to 11, the upper shoulder faces (58) of the forming stops (56) aligned according to the longitudinal direction (X) are leveled at a different level, higher or lower, with respect to the upper shoulder faces (59) of the stops ( 56) formers aligned according to the transverse direction (Y).
    [0356] In Fig. 11, the two forming stops (56) aligned along the longitudinal direction (X) have an upper end face (58) but lack side end faces (C1, C2, C3, C4).
    [0358] Each upper end face (58) is attached to the movable rod (36b) of a stop pneumatic cylinder (36), each of the rods (36b) being guided by a cylinder guide device (37) that guides each rod (36b) movable according to the longitudinal direction (X).
    [0359] This cylinder guide device (37) is embodied in particular in a linear guide supported on the support (21) next to the stop pneumatic cylinder (36), and a linear slide (38) coupled to the linear guide (37), which is joined in turn to the stem (36b).
    [0361] The two forming stops (56) aligned in the transverse direction (Y) each have a stop member (57a). Each stop member (56) is attached to the movable rod (36b) of a respective stop pneumatic cylinder (36), each of the rods (36b) being guided by a cylinder guide device (37) embodied in two linear rods that they guide each movable stem (36b) in the transverse direction (Y).
    [0363] Each of these stop members (57a) is said cast nylon block having a machined side end face (C4) and a horizontal bending edge (AH).
    [0365] Alternatively, in an option not shown, the stop member (57a) may comprise a plate at the top, bolted to the nylon block of the stop member (57). The plate integrates the horizontal bending edge (AH).
    [0367] The first embodiment of the machine (100) is useful for the formation of the box (B) of Figs. 3 and / or 16, where each corner zone of said boxes includes lateral portions of two contiguous lateral walls (PL) that define it.
    [0369] The second embodiment of the machine (100) is obtained by the combination resulting from replacing the cores (60) and molds (50) of Fig. 15 with those of Figs. 9 to 11.
    [0370] The machine (100) of Fig. 15 comprises some variations with respect to the first embodiment, and they are described below.
    [0371] The machine (100) comprises two forming stations, each one equipped with a core (60) and a mold (50), and supported on the same chassis (1). The machine (100) also comprises two plate conveyors supported on this same chassis (1), each equipped with two plate guides (40), and each configured to transport plates (P) to a respective forming station , with respective four glue injectors (45) being suspended on each conveyor.
    [0373] Each mold (50) comprises benders that include a plurality of first and second benders (51, 53) arranged around the cavity (52) located in correspondence with the lateral envelope of the box (B) to be formed in each station.
    [0375] Any of the first and second embodiments may have a guiding device (not shown) associated with said mold (50), provided with two mutually facing box guides, configured to guide the boxes through said outlet mouth.
    [0376] Preferably, the Z direction of the figures corresponds to the vertical, with the male (15, 60) and the mold (50) being aligned according to the vertical, and said inlet and outlet openings being mutually aligned according to the vertical, so that said device of Guiding is configured so that the boxes (B) exit below the outlet mouth.
    [0378] In the figures, the flat flange faces (58, 59) of each of said stops (56) are horizontal and said tap benders (64) are configured to horizontally press the overlapping portions of said outer flanges against said flat flange faces. (58, 59).
    [0380] In Figs. 15, 19 and 20, the male benders (64) of the male bender device are operatively connected to a male actuator integrated in the male (60), the activation of which is independent of the male actuation (10).
    [0382] The tap actuator is configured to move the tap benders (64) linearly, each in a linear expansive direction not aligned with the vertical linear (Z) direction, between the protrusion position of Fig. 20, where they protrude toward the outside of the flat lateral sides (62), and a retracted position of Figs. 15 and 19 where they do not project outwards from said flat lateral sides (62).
    [0384] Each linear expansive direction is perpendicular to the vertical linear (Z) direction. The corner core benders (64b) are screwed to the core of the core materialized in a machined cast nylon block.
    [0385] The plug actuator is a pneumatic rotary cylinder (not shown) provided with a rotary shaft (67). The male (60) further comprises four guides (69) and four conjugate guides (70). Each guide (69) is integral with a respective forming member (64a) and is linearly coupled to run in a corresponding mating guide. Each conjugate guide is a recess made in the core of the core (60) on each flat lateral side (62). Therefore, the conjugate guides are integral with the flat lateral sides (62).
    [0387] The male (60) further comprises four arms (68), each one articulated by its respective proximal end at a respective point integral with the axis of rotation (67), and each one articulated at its respective distal end with respect to each forming member ( 64a) embodied in a male bender.
    [0389] In Figs. 21 and 22, the male (80) comprises two elastic elements (71), materialized in helical compression springs, which connect the front side (61) with the rear (63), and some rods (72) joined by screws to the side front (61) and aligned according to the linear direction (Z), operatively connected to pivot each of the male benders (64) around a respective joint (73) in the presence or absence of pressure on the front side (61 ), between the protruding position of Fig. 22, where said flat lateral sides (62) project outwards, and a retracted position of Fig. 21, where said flat lateral sides do not protrude outwards (62). The presence or absence of pressure on said front side (61) is determined by its pressure on the bottom (F) of the plate (P).
    [0391] Fig. 22 shows that the male (80) comprises at least four limiting elements (74), materialized in helical tension springs. Each one of them has its proximal end connected to the front side (61) and its opposite end connected to one of the male benders (64), being compactly integrated in said male (80) by the lateral envelope defined by the sides. flat sides (62), to keep the male benders (64) in a retracted position in the absence of pressure on the front side (61).
    [0393] In a complementary embodiment not shown, each press (46) and / or stop (56) has integrated a plurality of lateral flange faces (C1, C4), each of these pluralities including at least two to seven lateral flange faces (C1 , C4).
    [0395] The scope of the present invention is defined by the following claims.
    权利要求:
    Claims (20)
    [1]
    1.- Machine (100) for the formation of boxes with flanges located in the upper part of the side walls of the same and folded towards the outside of said boxes, said machine (100) comprising:
    a chassis (1);
    a mold (50) supported on said chassis (1), comprising a cavity (52) corresponding to the box to be formed and in which a male (15, 60, 80) is insertable, a plate entrance opening to said cavity (52) and an outlet mouth of said formed box cavity (52), mutually facing each other according to a direction (Z), and benders arranged around said cavity (52);
    a male drive (10) supported on said chassis (1), configured to move said male (15, 60, 80) linearly in a guided manner according to said direction (Z) in opposite directions, between a position of maximum extraction where said male (15, 60, 80) is outside said cavity (52), and a position of maximum introduction where said male (15, 60, 80) is inside said cavity (52);
    said male (15, 60, 80), supported on a connection support (11) of said male drive (10), aligned with said mold (50) according to a direction (Z), and having essentially the shape of a truncated pyramid inverted, said male (15, 60, 80) comprising:
    a front side (61) and a rear side (63) according to the direction of insertion of the core (15, 60, 80) into the mold (50), and four flat lateral sides (62) arranged mutually facing each other two by two around an arm, each of which forms an inclined angle with respect to said direction (Z); and
    wherein said front side (61) comprises a flat bottom surface (65) configured to press a bottom portion of a plate positioned in said inlet mouth and insert it into the cavity (52), and
    on said rear side (63) four male benders (64) are mounted, facing each other in pairs, one associated with each of the flat lateral sides (62), and configured to protrude outwards with respect to said flat lateral sides (62 ) and bend outward four flanges located at the upper ends of the side walls of the box; and
    characterized because
    said mold (50) further comprises stops (56), mutually facing and arranged around the cavity (52), each activated by one or more stop actuators (36), between a retracted position adjacent to the cavity (52) where they do not interfere with the box to be formed, and a stop position in where one or more flat end faces (58, 59) of each of said stops (56) are configured to be located adjacent to the fold lines that connect the outer flanges with the side walls of the box, and said one or more expensive flat nose pads (58, 59) in said abutment position to receive pressure from the outer flanges upon their bending outward by the male benders (64);
    said male benders (64) are configured to press the overlapping portions of said outer flanges against said one or more flat nose faces (58, 59) in their abutting position with the male (15, 60, 80) inserted into the box in the position of maximum introduction, and are configured to glue some outer edges with others in their overlapping portions by means of points or glue beads;
    the movement of the stops (56) from their stop position to their retracted position allows the formed boxes to pass through said outlet mouth;
    The mold (50) further comprises at least six lateral end faces (C1, C4), movable between respective retracted positions adjacent to the cavity (52) and respective abutment positions towards the interior of the cavity (52), arranged laterally around the cavity (52), each of them having an inclination with respect to the linear direction (Z) complementary to that of each of the flat lateral sides (62) of the male (15, 60, 80), the at least six state side end faces (C1, C4) in their stop positions configured to press the outer part of the box (B), this outer part including the corner areas thereof, against the four flat lateral sides (62) of the male ( 15, 60, 80) into the cavity (52);
    being two lateral flange faces (C4) of these six integrated, each one in a respective stop (56), and the other four lateral flange faces (C1) of these six integrated, each one in a respective press (46) of the mold (fifty),
    these four presses (46) being mutually opposite in pairs, and arranged laterally around the cavity (52), each press (46) being articulated in a respective press joint (48) with respect to the lateral support faces (C4) integrated in the forming stops (56), and
    these presses (46) being movable, between a retracted position, towards the outside of the cavity (52), and a pressure position, towards the inside of the cavity (52) where they are dimensioned and positioned to bend and press the part outside of the box (B) in two Opposing side walls (PL) against respective opposite flat side sides (62) of the core (15, 60, 80).
    [2]
    2. - Machine (100) according to claim 1, wherein the mold benders (50) comprise a plurality of first and second benders (51, 53).
    [3]
    3. - Machine (100) according to claim 1 or 2, wherein the mold benders (50) are integrated into the stops (56).
    [4]
    4. - Machine (100) according to claim 1, 2 or 3, comprising a guiding device associated with said mold (50), provided with two mutually facing box guides, configured to guide the boxes through said outlet mouth.
    [5]
    5. - Machine (100) according to claim 4, in which the Z direction corresponds to the vertical, leaving the male (15, 60, 80) and the mold (50) aligned according to the vertical, and said inlet and outlet openings are mutually aligned according to the vertical, so that said guiding device is configured so that the boxes (B) exit below the outlet mouth.
    [6]
    6. - Machine (100) according to claim 5, further comprising a conveyor supported on the chassis (1), equipped with two horizontal plate guides (40) configured to be one on each side of the plate to be transported from a position initial position towards its position in the inlet mouth, and a plurality of glue injectors (45), supported on the chassis (1) and suspended on said guides (40), configured to deposit dots or glue cords on the plate during its transport.
    [7]
    7. - Machine (100) according to claim 5 or 6, wherein said flat end faces (58, 59) of each of said stops (56) are horizontal and said male benders (64) are configured to horizontally press the overlapping portions of said outer flanges against said flat end faces (58, 59).
    [8]
    8. - Machine (100) according to any one of the preceding claims, wherein these presses (46) are movable with respect to the respective press joints (48) by means of respective press actuators supported on a movable part of a stop actuator of each stop (56).
    [9]
    9. - Machine (100) according to claim 8, wherein each press (46) is articulated by means of the respective press joints (48) to respective lateral ends of the lateral support faces (C4) integrated in the forming stops (56) .
    [10]
    10. - Machine (100) according to claim 8 or 9, wherein each press actuator is a pneumatic press cylinder (47), and each stop actuator is a pneumatic stop cylinder (36).
    [11]
    11. - Machine (100) according to any one of the preceding claims, wherein the flat flange faces (58, 59), and the lateral flange faces (C1, C4) of stops (56) and presses (47), are configured to be immobilized in the stop position.
    [12]
    12. - Machine (100) according to claim 11, wherein each stop (56) also has an integrated horizontal bending edge (AH) adjacent to the flat end face (58, 59), configured to bend around the line of lip bend (LR) each lip (R) outward, and to be positioned at the stop position adjacent to the lip bend line (LR) during pressure of the side flange faces (C1, C4) of the stops (56) and presses (47) against the outside of the box (B).
    [13]
    13. - Machine (100) according to claim 11 or 12, wherein each press (46) and / or stop (56) has integrated a plurality of side flange faces (C1, C4), which includes at least two to seven side end faces (C1, C4).
    [14]
    14. - Machine (100) according to any one of the preceding claims, wherein the lateral support faces (C1, C4) of the mold (50) include respective pressure surfaces of dimensions essentially coinciding with each of the counter pressure surfaces of the flat lateral sides (62) of the male (15, 60, 80).
    [15]
    15. - Machine (100) according to claim 14, the mold (50) comprises molding edges (A50) defined by the lateral end faces (C1, C4), and include respective edge portions of essentially coincident lengths with each of the male edges (A60) positioned and included in the corner areas of the male (15, 60, 80).
    [16]
    16. - Machine (100) according to claim 14 or 15, wherein the lateral end faces (C1, C4) and the corner areas of the male (15, 60, 80) defined by flat lateral sides (62) of the male ( 15, 60, 80) are machined on nylon blocks.
    [17]
    17. - Machine (100) according to any one of the preceding claims, wherein the four male benders (64) are part of a male bender device, which further comprises four angled male benders (64b), distributed around the support connection (11), each of them positioned in a corner area of the male (15, 60, 80) sandwiched between two contiguous male benders (64), and positioned in use in a protruding position towards the outside of the male (15, 60, 80) in the corner zone of the same defined by the four flat lateral sides (62); being the four angled male benders (64b) configured to, with the male (15, 60, 80) positioned in the maximum insertion position, superiorly pressing by contact the overlapping portions (A) of the flanges (R) located in the corner areas of the box (B) and previously bent towards the outside of the same, and glue these edges (R) against others by pressure in these overlapping portions (A), by means of points or glue beads (CC).
    [18]
    18. Machine (100) according to claim 17, wherein the angled core benders (64b) are configured to press against the shaping stops (56) in the stop position.
    [19]
    19. Machine (100) according to any of claims 17 or 18, wherein the mold (50) additionally comprises two stops (56), and the eight male benders (64, 64b) of the male bender device are separated, with the male (15, 60, 80) in the inserted position and the male benders in the protruding position in use, two different distances from the flat end faces (58, 59) of the forming stops (56): a first distance associated with the plate thickness (P) positioned along the flanges (R) in the portions of the flanges (R) where they do not overlap each other, and a second distance associated with twice the plate thickness ( P) associated with the overlapping portions (A).
    [20]
    20. Machine (100) according to any one of claims 17 to 19, wherein the male (15, 60, 80) comprises an ejector device (75) integrated in the flat bottom surface (65) of the male (15, 60, 80), the ejector device (75) being configured to facilitate the extraction of the core (15, 60, 80) from the box (B) formed.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB1490301A|1974-04-16|1977-11-02|Machida Shigyo Co Ltd|Manufacturing containers by folding blanks|
    EP0022139A1|1979-07-06|1981-01-14|Kliklok Corporation|Method and apparatus for forming a flanged tray|
    US4522618A|1982-04-08|1985-06-11|Sprinter Systems Incorporated|Mechanism for assembling tapered, nested containers|
    ES8609031A1|1984-05-04|1986-09-01|Metal Box Plc|Methods and apparatus for erecting tray-type cartons.|
    ES2593823A1|2015-06-08|2016-12-13|Telesforo Gonzalez Maquinaria Slu|Machine for forming bases or caps of prismatic boxes by bending and joining of die-cut plates |
    ES1231506U|2019-06-04|2019-06-25|Telesforo Gonzalez Maqu Slu|MACHINE FOR CASTING MACHINE, AND SAID MACHINE |
    法律状态:
    2022-01-18| GD2A| Contractual licences|Effective date: 20220118 |
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    ES202030190|2020-03-05|
    ES202030980A|ES2851825A1|2020-03-05|2020-09-29|MACHINE AND METHOD FOR THE FORMATION OF BOXES, INTENDED TO BE NESTED AND WITH EDGES LOCATED ON THE TOP OF THE SIDE WALLS OF THE SAME AND FOLDED TOWARDS THE OUTSIDE OF THESE |
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