• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention is concerned with improvements in the art of making brushes (2), particularly toothbrushes (2). For this purpose, inter alia, a bristle carrier (1), also referred to as carrier plate, is proposed, which has at least one material projection (5) adjacent to a plurality of receiving holes (4) on its front side (3) and associated with at least one of the receiving holes (4) along at least part of its circumference (6) bounded laterally and the surrounding him the front side (3) of the bristle carrier (1).
    公开号:BE1025851B1
    申请号:E2018/5507
    申请日:2018-07-13
    公开日:2019-07-30
    发明作者:Ingo Kumpf；Stefan Zimmermann；Marc König
    申请人:Zahoransky Ag；
    IPC主号:
    专利说明:

    The invention relates to a bristle holder made of plastic for a brush or toothbrush, a brush with a bristle holder equipped with bristle bundles, a method for producing a brush and a device for producing a brush.
    Such methods and devices are previously known from the prior art in various embodiments. For example, the document DE 10 2015 111 312 A1 describes a method and a device for anchoring bristles without anchors in a bristle carrier. Here, a tool part has a heater with which an end face of the tool part can be heated. After the bristles have been inserted into the receiving holes in the bristle carrier, the receiving holes are deformed with the aid of the heated tool part, reducing their cross section, in such a way that the bristles or bundles of bristles are fastened in the receiving holes.
    Depending on the cross-sectional geometries of the bristle bundles, difficulties can be encountered when fastening the bristle bundles in the manner described above. Above all, the attachment of large bundles of bristles or so-called power tufts, which are composed of a large number of individual bristles and which have a comparatively large cross section, is comparatively difficult.
    The object of the invention is therefore to provide a bristle carrier, a brush, a method and a corresponding device for producing a brush, which simplify the attachment of bristle bundles to a bristle carrier.
    This task is carried out with a bristle carrier of the type mentioned
    BE2018 / 5507 solved by the means and features of the independent claim directed to such a bristle carrier. In particular, in order to achieve the object in the bristle holder of the type mentioned at the outset, it is proposed that the bristle holder have at least one material projection on its front side, which laterally delimits at least one of the receiving holes along at least part of its circumference and that projects beyond the front side of the bristle holder surrounding it. The material projection thus assigned to at least one receiving hole of the bristle carrier forms a material reservoir which, when the bristle carrier material is pressed and caked, can be pressed and / or displaced in a targeted manner for anchoring and / or fastening a bristle bundle in the respective receiving hole. In this way, particularly large bundles of bristles that are placed in correspondingly large receiving holes can be reliably attached to the bristle carrier in the manner described above.
    The aforementioned object is also achieved with a bristle carrier of the type mentioned at the outset, which comprises the means and features of the second independent claim directed to such a bristle carrier. In the case of a bristle carrier of the type mentioned at the outset, in order to achieve the object, it is in particular also proposed that the bristle carrier have an elevation in an inner region of its front side remote from the edge, which detects a plurality of receiving holes in the bristle carrier and which extends up to an edge region or up to an edge extends the front of the bristle holder.
    The increase contains a supply of material which, for fastening bristle bundles to the bristle carrier, first heats them, softens them and can finally be pushed under pressure into the receiving holes equipped with bristle bundles. With the result that
    BE2018 / 5507 also bristle bundles with a comparatively large cross section can be securely attached to the bristle carrier.
    It can be provided that a height of the elevation that can be measured above the edge of the front side decreases, preferably continuously, in the course of the elevation toward the edge region or the edge of the front side of the bristle carrier.
    A bristle carrier is thus created which has a body contour on its front side with an increase decreasing towards the edge or towards the edge region of the bristle carrier. As previously mentioned, this increase represents a material supply, the material of which can be displaced into the receiving holes when the bristle carrier is caked and pressed together for a particularly reliable fastening of the bristle bundles to the bristle carrier.
    The stock of material that is kept in the raised portion of the bristle carrier can be softened when the bristle carrier is heated and pressed. If the front side of the bristle carrier is then deformed with the application of pressure when the bristle bundles are attached to the bristle carrier, the material held in the raised portion diverts in the direction of the receiving holes and helps there to reduce the cross sections of the receiving holes. This favors a comparatively simple and reliable anchoring of the individual bristle bundles in the receiving holes of the bristle holder.
    At this point it should be expressly mentioned that the features of the bristle carriers described above can be combined with one another in an advantageous manner. So it can be particularly advantageous if the bristle carrier has at least one material projection on its front side, which has at least one of the receiving holes
    BE2018 / 5507 laterally delimited along at least part of its circumference and projecting beyond the front side of the bristle holder surrounding it and that the bristle holder has an elevation in its front area remote from the edge, which detects several receiving holes and their height measured over an edge of the front side towards one Edge area or the edge of the front of the bristle carrier decreases. In this way, the at least one material projection can be arranged on a front side of the elevation and can project beyond this elevation by a defined amount.
    The elevation on the front of the bristle carrier can be surrounded by a shoulder formed in the edge area of the front and can comprise a plateau and a transition area. The plateau can be connected to the heel by the transition area. Furthermore, the transition area of the increase in its course towards the paragraph may decrease, preferably steadily, until it has reached the level of the paragraph.
    In a variant of the bristle carrier, it can also be provided that the bristle carrier in a section covered by the elevation, in particular in the region of the plateau described above, has a greater material thickness than in an edge region surrounding the elevation, in particular in the region of the heel, or on Has edge of the bristle carrier. In this way, a bristle carrier is created which can be configured essentially flat on its rear side facing away from the front. In addition, a sufficiently large excess of material for the particularly reliable fastening of individual bristle bundles to the bristle holder can be provided in the elevation on the front of the bristle holder.
    The bristle holder can also be raised by a convex
    BE2018 / 5507
    Curvature of the front of the bristle carrier can be formed.
    In one embodiment of the bristle carrier, the elevation can capture at least one receiving hole located at the edge of the bristle carrier or all of the receiving holes located at the edge of the bristle carrier. The receiving hole (s) can preferably be arranged in a transition area between an inner area of the elevation, in particular the plateau previously mentioned, and an edge area lying lower than this, in particular the previously mentioned heel. In this way, a bundle of bristles, which is introduced into a receiving hole located at the edge, can also be fastened in the respective receiving hole with the aid of material originating from the elevation. Furthermore, it is possible for the height of the elevation that can be measured above the edge to decrease continuously toward the edge region or edge of the front of the bristle carrier, in particular in the course of the transition region described above.
    At this point it should be mentioned that the elevation on the front of the bristle holder can be designed such that all of the receiving holes on the front of the bristle holder, which together form a perforated field of the bristle holder, are at least partially covered by the elevation. Sufficient material is therefore available in the elevation in order to be able to reliably secure bundles of bristles in all of the receiving holes in the bristle holder.
    In particular, where less material of the bristle holder is required and has to be displaced when fastening individual bristle bundles, it can be expedient if the bristle holder has at least one recess on its front side, which at least partially covers at least one receiving hole of the bristle holder.
    BE2018 / 5507
    The bristle carrier can preferably consist of a thermoplastic. The bristles that are used to form the bristle bundles to be attached to the bristle carrier can also consist of such a thermoplastic. In this context, however, it can be advantageous if the bristle filaments consist of such a thermoplastic which has a higher melting temperature than the thermoplastic from which the bristle carrier is formed. In this way, the bristle carrier can be softened when heated or heated, without the bristles losing any significant stability or even becoming soft or liquid.
    The invention is also achieved by a brush with the means and features of the independent claim directed to a brush. In particular, in order to achieve the object in the case of a brush of the type mentioned in the introduction, it is proposed that the bristle carrier is a bristle carrier according to one of claims 1 to 7.
    To achieve the object, a method for producing a brush is also proposed which has a bristle carrier made of thermoplastic material with at least one receiving hole, into which at least one bristle made of thermoplastic material is inserted and fastened, the method having the features and means of such a Method directed independent claim includes. In particular, in order to achieve the object in a method of the type mentioned at the outset, it is proposed that the at least one bristle with a fastening end is inserted into a receiving hole of a bristle holder according to one of claims 1 to 7, after which the bristle holder heats up and reduces at least one cross section of the receiving hole is pressed and baked with the at least one bristle in such a way that the at least one bristle on the
    BE2018 / 5507
    Bristle holder is attached.
    In this case, the at least one material projection and / or the elevation on the front of the bristle carrier can be softened and the material located therein can preferably be displaced into the latter in order to reduce the cross section of the at least one receiving hole. At least a part of the material contained in the at least one material projection and / or in the elevation can be displaced, preferably in the at least one receiving hole.
    When carrying out the method, it is possible for the at least one bristle to be pushed into the receiving hole with a press ram and / or also using a profile plate and / or fastened to the bristle carrier. As will be explained in more detail below, the press ram can have at least one corresponding bristle holder for this purpose. The bristle can be arranged in this bristle holder and inserted into the receiving hole of the bristle holder. With the aid of the press ram, the bristle carrier can then be pressed in the manner described above, reducing the cross section of the receiving hole into which the bristle was previously inserted, in such a way that the bristle is attached to the bristle carrier.
    In particular for the production of so-called profiled bristle fields, it can also be expedient to use a so-called profile plate when inserting several bristles, which can also be in the form of bundles of bristles. This profile plate can define a position of the at least one bristle when the bristle carrier is pressed and caked. By using a profile plate, the accuracy in the manufacture of the brush can be increased according to the previously described method.
    BE2018 / 5507
    The at least one bristle can be sucked in against the direction of insertion, at least when inserted into the receiving hole of the bristle carrier, and can thus be held on the aforementioned press ram and / or on the profile plate. In this way, an unintentional loss or slipping of the bristle when inserted into the receiving hole of the bristle holder can be avoided. For this purpose, a press ram and / or a profile plate used can each have at least one air channel through which a vacuum for suction can be exerted on the at least one bristle.
    After it has been attached to the bristle carrier, the at least one bristle can be detached again by blowing in air from, for example, the press ram mentioned above. For this purpose, the air can be blown in, for example, through the at least one air duct of the press ram mentioned above. An overpressure will thus be generated in the bristle receptacle of the press plunger, by means of which a bristle located therein or also a plurality of bristles or a bristle bundle which comprises a plurality of bristles is more easily released from the bristle receptacle.
    Furthermore, it is possible to cool the bristle carrier after the at least one bristle has been fastened, in particular by blowing in air. The previously mentioned air channels of the press ram or the profile plate can be used to blow air onto the bristle carrier to cool it.
    The at least one bristle can be melted at its fastening end before the bristle is pushed into the receiving hole. It is possible to form a thickened portion at the attachment end of the bristle. This thickening at the attachment end of the
    BE2018 / 5507
    Bristle can be mushroom-shaped. The thickening at the attachment end can favor a reliable attachment of the bristle to a bristle holder according to the previously described method.
    At this point, it should be pointed out that wherever there was previously talk of at least one bristle that is to be fastened in or on a bristle carrier, bristle bundles that consist of several bristles can of course also be meant. Of course, it is possible to melt bristle bundles, which consist of several bristles, in the manner described above, before being inserted into the receiving hole of the bristle holder in which they are to be fastened, at their fastening end and thereby, in particular a mushroom-shaped, thickening on the To produce the fastening end of the respective bristle bundle.
    It is particularly advantageous if the at least one bristle is melted in the manner described above immediately before the bristle is inserted into the receiving hole and a thickening is formed at its fastening end.
    A pressing tool, a pressing die, at least one mold half of a pressing mold and / or the bristle carrier and optionally also a thickening at the fastening end of the at least one bristle can be heated at least before the bristle is inserted into the receptacle of the bristle carrier. This can be accompanied by the advantage that the bristle carrier keeps its heat, which is favorable for pressing, longer and does not give off so quickly. The deformation of the bristle carrier for fastening the at least one bristle in the receiving hole of the bristle carrier can thus be carried out more efficiently and with better results.
    BE2018 / 5507
    In particular, even if a thickening, which is formed at the fastening end of the at least one bristle to be fastened, is heated before the bristle is pushed into the receiving hole assigned to it, a material connection between the material of the at least a bristle and the material of the bristle carrier are produced. Put simply, the bristle and the bristle carrier can be glued to one another when the bristle carrier is pressed, as a result of which the anchoring of the at least one bristle on the bristle carrier can be even more resilient.
    Finally, the object is also achieved by a device of the type mentioned at the outset, in which the means and features of the independent claim directed to such a device are provided. In particular, in order to achieve the object, it is proposed that the device be set up to carry out the method according to claim 9.
    The device can have a press tool which comprises a press mold with at least one mold cavity for receiving a bristle carrier and at least one press stamp. A bristle carrier, as has already been described in detail above, can be inserted into the mold cavity of the press mold. With the aid of the press ram, the at least one bristle can be fastened to the bristle carrier after it has been inserted or inserted into the receiving hole provided for it, by pressing the bristle carrier onto it. Furthermore, the press ram can be set up to insert the at least one bristle with its fastening end into the receiving hole of the bristle carrier provided for it before the bristle carrier is actually pressed.
    BE2018 / 5507
    The press mold can have two mold halves, the at least one mold cavity being formed in a first mold half of the two mold halves and a second mold half of the two mold halves comprising a stamp opening through which the press stamp can be passed for pressing a bristle carrier arranged in the mold cavity. When the press tool is closed, the first and the second mold halves of the press mold can close so tightly that a pressure applied by the press ram to a bristle carrier positioned in the mold cavity acts almost completely on the bristle carrier and is not lost. In this case, the pressure applied by the press ram can be directed such that the material displacement which favors the fastening of the at least one bristle in the receiving hole of the bristle carrier takes place essentially in the direction of the at least one receiving hole. The punch opening of the press mold, through which the punch can be passed for deforming and pressing the bristle carrier, can preferably have a smaller cross section than the mold cavity for receiving the bristle carrier. In this way, an unintentional evasion of the material when pressing the press ram onto the bristle carrier can be avoided.
    The press ram can be set up to insert the at least one bristle into the receiving hole provided for it before the bristle carrier is actually pressed. For this purpose, the press ram can have at least one bristle holder in which the at least one bristle can be arranged and fed to the bristle carrier. By moving the press ram in the direction of the mold cavity and thus in the direction of a bristle carrier located therein, a bristle located in this bristle holder can be inserted into the receiving hole of the bristle holder. The press ram can preferably have a plurality of bristle receptacles, in number and arrangement
    BE2018 / 5507 correspond to a number and arrangement of receiving holes of a bristle carrier to be machined on the device.
    The pressing tool can have a profile plate. The profile plate has already been explained in connection with the method for producing a brush. The profile plate can be used to support at least one bristle when inserted into a receiving hole of a bristle holder and / or to specify a desired position of the bristle on the bristle holder and can be set up accordingly. Such profile plates are used in particular in devices which are intended for the production of brushes which have what is known as a profiled bristle field, the individual bristles or bristle bundles of which protrude to different extents from a front side of the bristle carrier.
    In one embodiment of the device, the profile plate can have at least one profile pin or a plurality of profile pins. The at least one profile pin can be arranged in the use position of the profile plate, in particular in the previously mentioned bristle holder of the press ram. The profile plate can preferably have a plurality of profile pins, the number and arrangement of which correspond to a number and arrangement of receiving holes of a bristle carrier to be machined on the device. In addition, it is possible for the profiled pins to have contoured and / or inclined end faces. With these end faces, free ends of contoured bristle bundles, which consist of several bristles, can be supported accordingly.
    It can be advantageous if a longitudinal axis of the at least one profile pin with the profile plate in the use position
    BE2018 / 5507 is congruent with a longitudinal axis of a bristle holder of the press ram assigned to the at least one profile pin.
    For the production of brushes with contoured bristle fields, it can also be advantageous if the profile pins of the profile plate have different lengths. Long profile pins can then support correspondingly short bristles or bundles of bristles, while short profile pins are provided for supporting those bristles or bundles of bristles which protrude in or on the bristle field of the brush to be produced with a correspondingly greater length on the front of the bristle carrier.
    For the sake of completeness, it should be mentioned that the profile plate can have at least one profile recess in addition to or instead of at least one profile pin. The at least one profile recess can be used to support the bristle bundles or bristles when they are pushed into the bristle carrier. Furthermore, free bundle ends of bristle bundles can be contoured with the aid of such a profile recess if the at least one profile recess is itself contoured, that is to say, for example, has a contoured base. In addition, it can be advantageous if the at least one profile recess, when the profile plate is in the position of use, is aligned or arranged with the associated bristle holder of the press ram. Here, a longitudinal axis of the profile recess can be congruent with a longitudinal axis of the bristle holder of the press ram.
    The pressing tool can also have an air connection, for example an intake port. The press ram mentioned above and / or the profile plate can each have at least one air duct. Via the air connection and the at least one
    BE2018 / 5507
    Air duct, a negative pressure and / or, if necessary, an excess pressure can be applied to the pressing tool. An overpressure can be applied to the pressing tool in order to discharge air through the air duct onto a bristle or a bristle carrier. With the aid of air or compressed air, a bristle can be more easily detached from the pressing tool, in particular from the pressing die and its bristle holder, after it is attached to a bristle carrier. Furthermore, it is possible to cool the bristle carrier by blowing it off with compressed air or air after the at least one bristle has been attached to the bristle carrier. The air required for this can be inflated onto the bristle carrier via the at least one air duct and the air connection.
    The pressing tool can have a chamber. The air connection of the pressing tool can be connected via this chamber to the at least one air duct of the pressing die and / or the profile plate. Therefore, the chamber can also be called an intake chamber. It is also possible that the profile plate is arranged in the chamber.
    It can be particularly advantageous if each profile pin of the profile plate and / or each bristle holder of the press ram each has an air channel. In this way, a plurality of bristles or bundles of bristles can be sucked in when inserted into receiving holes of a bristle carrier by negative pressure, which acts on the bristles and / or bristle bundles through the air duct, and at least temporarily held on the profile plate and / or the press ram. Furthermore, it is possible to deliver air in a targeted manner through each of the air channels in order to cool the bristle carrier after fastening at least one bristle and / or to detach the at least one bristle from the press ram.
    BE2018 / 5507
    Each profile pin of a profile plate, for example the one already mentioned above, can be arranged in a bristle receptacle of the press ram when the profile plate is in the use position, in order to be able to support at least one bristle located therein when it is inserted into a receiving hole of a bristle carrier.
    The profile plate can be movable relative to the press ram against the restoring force of a restoring element, in particular a restoring spring. This restoring force is preferably aligned in the pressing-in direction of the press ram and thus in the direction of insertion of the bristles into the receiving holes of a bristle carrier. The restoring element can be arranged in a particularly protected manner in the chamber of the pressing tool described above.
    The profile plate sprung by the restoring element can ensure that the at least one bristle and / or the bristle bundle with its fastening end stand up at the base of the receiving hole of the bristle carrier before the actual pressing of the bristle carrier takes place with the aid of the press die. In this way, the at least one bristle can be positioned in the receiving hole with very high accuracy and finally attached to the bristle carrier.
    The device can have a heating device. The heating device can, for example, be designed as a heating plate and / or be set up to heat or keep the press mold, the press ram and / or a brush body arranged in the mold cavity of the press mold. For this purpose, the heating device can have a heating surface facing the pressing mold in the heating position and / or a heating surface facing the pressing die. With the help of the heating surface facing the press stamp
    BE2018 / 5507, fastening ends of the bristles or bristle bundles to be fastened can also be heated, fused and deformed into preferably mushroom-shaped thickenings. Such, preferably mushroom-shaped, thickenings can of course also be produced in a separate melting device or melting unit, which in turn can be part of the device. The melting device or melting unit can be arranged upstream of the pressing tool. Bristle bundles or bristles already provided with such thickenings can then be fed to the pressing tool.
    The press ram can have a heating device with which its end face facing the mold cavity can be heated. In this case, a brush body can be heated with the press ram to a temperature required for fastening the at least one bristle.
    In order to heat the mold or to keep it warm and thus to prevent premature dissipation of heat from the bristle carrier which is heated for shaping and pressing and which is arranged in the mold cavity of the one mold half of the mold, the mold can comprise at least one heating element. At least one heating element of the mold can be arranged on or in the first mold half. At least one heating element can be arranged in or on the second mold half. For example, a heating cartridge can be used as the heating element. Such a heating cartridge can be arranged in a corresponding recess or receptacle in or on the pressing tool, in particular in the first and / or in the second mold half of the pressing tool. The use of pin-shaped heating cartridges, which are arranged in or on the pressing tool, around the first and / or the second is particularly expedient
    BE2018 / 5507
    To heat or keep the mold half and the mold cavity and a bristle carrier located therein.
    Embodiments of the invention will now be described with reference to the drawing. They show in a partially highly schematic representation
    Fig. 1 a perspective view of a first bristle carrier inShape of a brush body, Fig. 2 2 shows an end view of the bristle holder shown in FIG. 1, an elevation serving as a material reservoir being visible on a front side of the bristle holder, the height of which continuously decreases from an inner region of the front side of the bristle holder remote from the edge towards an edge region or edge of the bristle holder, Fig. 3 a side view of that shown in Figures 1 and 2Bristle carrier, Fig. 4 2 shows a perspective view of a further bristle carrier, an elevation in an inner region of the front side of the bristle carrier remote from the edge and a total of three material projections associated with three individual receiving holes and a material recess being recognizable, the material recess capturing a total of four of the receiving holes of the bristle carrier, Fig. 5 an end view of the shown in Figure 4Bristle carrier,
    BE2018 / 5507
    18 Fig. 6 3 shows a partially sectioned side view of the bristle carrier shown in FIGS. 4 and 5, Fig. 7 2 shows a schematic exploded illustration of a pressing tool of a device for producing a brush, Fig. 8 7 shows a sectional side view of the pressing tool shown in FIG. 7 with a heating device located between a pressing die and a pressing mold, Fig. 9 the pressing tool shown in FIGS. 7 and 8 with the pressing die located in the pressing position on a bristle carrier, and Fig. 10 the detail marked with the circle D in FIG. 9 in an enlarged representation.
    In the following description of various embodiments of the invention, elements that correspond in terms of their function receive corresponding reference numbers even with a different design or shape.
    All of the figures show a bristle carrier made of a thermoplastic material, designated as a whole by 1. This bristle carrier 1 is used to produce a brush, in the present case a toothbrush, designated as a whole by 2. The bristle carrier 1 has a plurality of receiving holes 4 for bristle bundles on its front side 3. For the sake of clarity, the bristle bundles to be placed in the receiving holes 4 are not shown in FIGS. 1 to 6.
    BE2018 / 5507
    In the embodiment of the bristle carrier 1, which is shown in FIGS. 4 to 6, this bristle carrier 1 has a total of three material projections 5 on its front side 3. Each of these material projections 5 is assigned to at least one of the receiving holes 4. The material projections 5 limit their receiving holes 4 laterally along at least part of the respective circumference 6 of the receiving holes 4. In addition, the material projections 5 project beyond the front side 3 of the bristle carrier 1 surrounding them.
    The material projections 5 are assigned to particularly large receiving holes 4. So-called power tufts, that is to say bundles of bristles, which comprise a comparatively high number of individual bristle filaments, can be inserted into such particularly large receiving holes 4. The attachment of such power tufts to a bristle carrier 1 is particularly demanding. It was found that the additional material held in the material projections 5 promotes reliable fastening of precisely such power tufts when the bristle carrier 1 is pressed and caked with the bristle bundles, which are then introduced into the receiving holes 4.
    It can be seen in the bristle carrier 1 shown in FIGS. 1 to 3 that it comprises an elevation 7 on its front side 3 in addition to the plurality of receiving holes 4. This elevation 7 extends from an inner region 8 of the front side 3 of the bristle carrier 1 remote from the edge, which can also be referred to here as the central region 8 of the bristle carrier 1, to an edge region 9 or an edge 10 of the front side 3 of the bristle carrier 1 Elevation 7 detects at least partially all of the receiving holes 4 which together form a hole field of the bristle carrier 1.
    BE2018 / 5507
    Starting from the area 8 remote from the edge, the elevation 7 towards the edge 9 or the edge area 10 decreases continuously in height, which can be measured over the edge 10 of the bristle carrier 1. Starting from the central region 8 of the bristle carrier 1 remote from the edge, the elevation 7 has a contour with a continuous or flowing, stepless course toward the edge 10 or the edge region 9 of the front surface 3 of the bristle carrier 1.
    In both bristle carriers 1, the elevation 7 is in each case surrounded by a shoulder 11 formed in the edge region 9 of the front 3. Furthermore, each of the elevations 7 in the inner region 8 comprises a plateau 12, which is connected to the heel 11 by a transitional region 13 of the elevation 7 that slopes continuously towards the shoulder 11.
    As FIGS. 4 to 6 clearly illustrate, the bristle carrier 1 shown in these figures is also equipped with such an elevation 7. It should be noted that the material projections 5 described above still protrude beyond the elevation 7 by which they are surrounded. In this respect, the advantages associated with the use of material projections 5 and the elevation 7 in the bristle carrier 1, as shown in FIGS. 4 to 6, are combined with one another in a particularly positive manner.
    FIGS. 5 and 6 in particular show that the bristle carrier 1 in a section 14 covered by the elevation 7, in particular in the region of the plateau 12, has a greater material thickness than in an edge region 9 surrounding the elevation 7, namely the shoulder 11, of the front side 3 or at the edge 10 of the bristle carrier 1.
    The increase 7 can be in a not shown in the figures
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    Embodiment of a bristle holder may also be a convex curvature of the front 3 of the bristle holder 1.
    According to FIGS. 1 to 6, the elevation 7 also detects the receiving holes 4 located at the edge 10 of the bristle carrier 1. The receiving holes 4 near the edge are detected by the transition region 13 between the plateau 12 and the shoulder 11. Furthermore, as already mentioned, the height of the elevation 7 decreases continuously toward the edge region 9 and towards the edge 10 of the front 3 of the bristle carrier 1.
    According to FIGS. 4 to 6, the bristle carrier 1 has at least one recess 15 on its front side 3, which can also be referred to as a material recess. The depression 15 is introduced into the front side 3 of the bristle holder 1 in such a way that it partially covers a total of four individual receiving holes 4 of the bristle holder 1. Such depressions 15 can be provided in those areas of the front 3 of the bristle holder 1 in which an increased material displacement or an increased material supply for fastening individual bristle bundles to the bristle holder 1 is not absolutely necessary. In this way, material for producing the bristle carrier 1 can be saved if necessary.
    The bristle carriers 1 shown in the figures consist of a thermoplastic. Such a thermoplastic is particularly well suited for thermoplastic deformation with the application of pressure and heat to the bristle carrier 1 and thus particularly well for fastening individual bristle bundles to the bristle carrier 1 by the method described below.
    The bristle carrier 1 can be particularly expediently attached to one, in particular after fastening individual bristle bundles to the bristle carrier 1
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    Fasten brush 2, which in the present exemplary embodiment is designed as a toothbrush 2. In the two exemplary embodiments of bristle carriers 1 shown in FIGS. 1 to 6, these are designed as brush bodies 16, each of which forms a toothbrush 2 when fitted with bristle bundles.
    FIGS. 7 to 10 now show a pressing tool 18 which can be used in the device 17 for producing a brush 2, which is shown only in a highly schematic manner in the previous figures.
    The pressing tool 18 comprises a pressing mold 19 with at least one mold cavity 20. The mold cavity 20 serves to receive a bristle carrier 1, as has already been explained in detail in connection with FIGS. 1 to 6. Furthermore, the pressing tool 18 also has a pressing die 21. With the aid of this press ram 21, the bristle carrier 1 inserted into the mold cavity 20 can be deformed for the attachment of at least one bristle 22 in one of the existing receiving holes 14 of the bristle carrier 1 using pressure and heat.
    According to FIGS. 7 to 10, a plurality of bristles 22 are each inserted jointly into one of the receiving holes 4 of the bristle carrier 1 and then pressed and baked with the latter. The bristles 22, which are inserted together into a receiving hole 4 of the bristle holder 1 and fastened therein, together form a bristle bundle 23.
    The compression mold 19 comprises two mold halves 24 and 25, the at least one mold cavity 20 being formed in a mold half 24 of the two mold halves 24 and 25 which is lower in the figures. This lower one
    BE2018 / 5507
    Mold half 24 can also be referred to as the first mold half 24 of the two mold halves 24 and 25.
    A second or upper mold half 25 of the two mold halves 24 and 25 has a punch opening 26. The punch opening 26 is arranged opposite the mold cavity 20 when the mold 19 is closed. In this way, the press punch 21 can be passed through the punch opening 26 in the upper or second mold half 25 and can be fed in the direction of the mold nest 20. This is with the aim of pressing a bristle carrier 1 arranged in the mold cavity 20 for fastening the bristles 22 and bristle bundles 23 in the receiving holes 4 of the bristle carrier 1. The punch opening 26 has a smaller cross section than the mold cavity 20 for receiving the bristle carrier 1, which is formed in the lower mold half 24 of the die 19.
    The press ram 21 has as many bristle receptacles 27 as the bristle carrier 1 receiving holes 4. In this way it is possible to use the press ram to insert the bristle bundles 23 with their bristles 22 into the receiving holes 4 of the bristle carrier 1, which is kept in the mold cavity 20 21 introduce. The bristles 22 or bundles of bristles 23 are inserted into the receiving holes 4 using the press ram 21 before the press ram 21 contacts the bristle carrier 1 and, using pressure to fasten the bristles 22 and bristle bundles 23 in the receiving holes 4, in the manner already described in detail above and deformed way.
    The pressing tool 18 further comprises a profile plate 28. The profile plate 28 serves to support the bristles 22 and bristle bundles 23 when they are inserted into the receiving holes 4 of the bristle carrier 1. Furthermore, the profile plate 28 can be used to set a desired position of the bristles 22
    BE2018 / 5507 or the bristle bundle 22 can be specified on the bristle carrier 1.
    The profile plate 28 comprises as many profile pins 29 as the pressing die 21, bristle receptacles 27 and the bristle carrier 1, receptacle holes 4 for bristles 22 and bristle bundles 23, respectively. FIGS. 7 to 9 also illustrate that in each of the existing bristle receptacles 27, a profile pin 29 of the one in the position of use Profile plate 28 is arranged. Both the profile pins 29 of the profile plate 28 and the bristle receptacles 27 of the press die 21 have an arrangement which corresponds to an arrangement of the receiving holes 4 of the bristle carrier 1 to be processed with the device 17. Instead of a profile plate 28 with profile pins 29, for example, a profile plate 28 with profile recesses can also be used. The profile recesses can perform the same function as the profile pins 29 of the profile plate 28 shown in the figures.
    It is thus possible to support the bristle bundles 23 both with the profile pins 29 and with profile recesses, not shown in the figures, of a profile plate when inserted into the receiving holes 4 of the bristle carrier 1. In particular, when the bristles 22 of a bristle bundle 23 are still displaceable relative to one another, free bundle ends 23a of the bristle bundles 23 can be contoured both with the aid of the profile pins 29 shown in the figures and with profile recesses of a profile plate, not shown in the figures.
    FIGS. 7 to 9 in particular show that the profiled pins 29 have at their free ends with which they contact free bundle ends 23a of the bristle bundles 23 when the bristle bundles 23 are inserted into the receiving holes 4 of the mail carrier 1, end faces 29a oriented obliquely to their respective longitudinal axes. The profile pins 29 shown in FIGS. 7 to 9 are due to their thus contoured end faces 29a
    BE2018 / 5507 of the profile plate 28 is set up to fully support the bristle bundles 23 at their correspondingly contoured bundle ends 23a. Depending on the shape of the bristle bundles 23 to be inserted into the bristle carrier, at least some or all of the profile pins 29 of the profile plate 28 can have end faces 29aA which are aligned at right angles to a longitudinal axis of the respective profile pin 29.
    According to FIGS. 7 to 10, the pressing tool 18 also has an air connection 30. The profile plate 28 is penetrated by a plurality of air channels 31, at least two of which can be clearly seen in FIGS. 8 and 9.
    The air channels 31 are connected to the air connection 30 of the pressing tool 18 and open into the bristle receptacles 27 of the press ram 21. Via the air connection 30 and the air channels 31, a negative pressure can be applied to the bristle receptacles 27 with which the bristles 22 located in the bristle receptacles 27 and bristle bundles 23 can be sucked in and held.
    After the bristle bundles 23 have been fastened in the receiving holes 4 of the bristle carrier 1, air or compressed air can be blown into the bristle receptacles 27 via the air connection 30 and the air channels 31. As a result, the bristle bundles are more easily detached from the press ram 21 and the bristle carrier 1 is cooled. It is clear from the exploded view of the pressing tool 18 according to FIG. 7 that each profiled pin 29 of the profiled plate 28 and thus at least indirectly also each bristle receptacle 27 of the pressing die 21 is provided with an air channel 31.
    The profile plate 28 is against the restoring force of a restoring element 32, namely a restoring spring 32 relative to the
    BE2018 / 5507
    Press stamp 21 movable. In this way, the bristles 22 and bristle bundles 23 supported by the profile pins 29 of the profile plate with their fastening ends 38 can be inserted into the receiving holes 4 of the bristle carrier 1 as far as is necessary for their fastening to the bristle carrier 1. This is before the ram 21 contacts and deforms the bristle carrier 1 located in the mold cavity 20. The restoring force of the restoring spring 32 is oriented in the pressing direction of the ram 21. The restoring element 32 and also the profile plate 28 are arranged in a chamber 40 of the pressing tool 18. The chamber 40 is shown in FIG. 7 for better clarity because it is open at the side and carries the press ram 21 at its lower end. The air connection 30 and the air channels 31 in the profile pins 29 of the profile plate 28 are connected to one another via the chamber 40. The chamber 40 can therefore also be referred to as a suction chamber 40.
    The device 17 also has a heating device 33, which is shown in FIGS. 7 to 9. The heating device 33 of the exemplary embodiment of the device 17 shown in the figures is designed as a heating plate 33 which has a heating surface 34 facing the press mold 19 and a heating surface 35 facing the pressing die 21. With the help of its heating surface 35, the heating plate 33 can heat the press die 21 and the bristles 22 or bristle bundles 23 located therein. With the help of the second heating surface 34 of the heating plate 33, the mold 19 and also a bristle carrier 1 arranged in the mold cavity 20 of the mold 19 can be heated and / or kept at temperature.
    With its heating surface 35 facing the pressing die 21, the heating plate 33 is also set up to melt fastening ends 38 of the bristle bundles 23 or bristles 22 in such a way that mushroom-shaped thickenings 39 form on the fastening ends 38 of the FIG
    BE2018 / 5507
    Form bristles 22 or bristle bundles 23. With the thickenings 39, the bristles 22 or bristle bundles 23 can be fixed in the receiving holes 4 of the bristle carrier 1 in a particularly reliable manner. The heating plate 33 can be moved back and forth between a heating position, in which it is arranged according to FIG. 8 between the press die 21 and the die 19, and a rest position (see FIG. 9). Of course, the mushroom-shaped thickenings 39 can also be produced in an upstream melting device or melting unit, which is not shown in the figures.
    The mold 19 shown in the figures has a total of three heating elements 36 in the form of pin-shaped heating cartridges 36. The pin-shaped heating cartridges 36 are arranged in appropriately shaped cartridge receptacles 37 and are used to heat the first mold half 24 and the second mold half 25 or to keep them at temperature as required. The heating cartridges 36 can prevent premature cooling of a bristle carrier 1 arranged in the mold cavity 20.
    In the method for producing the brush 2, bundles of bristles are inserted into mounting holes 4 of a brush holder 1, which is made of thermoplastic, and fastened therein. The bristles 22, which form the bristle bundles 23, also consist of thermoplastic. At least one bristle 22 with a fastening end 38 is pushed into a receiving hole 4 of the bristle holder 1. The bristle carrier 1 is then or previously heated. While reducing at least one cross-section of the receiving hole 4 into which the at least one bristle 22 has been inserted, the bristle carrier 1 is pressed and baked with the at least one bristle 22. This happens in such a way that the at least one
    BE2018 / 5507
    Bristle 22 is then attached to the bristle carrier 1.
    The bristle carrier 1 can be heated, for example, by means of hot air, radiant heat, or also by contact with a heated tool part, for example with the press ram 31 mentioned above. It can be particularly advantageous if the bristle carrier 1 is heated with such a tool part, which in turn has a heater that heats its end face and with which the at least one bristle 22 and / or the at least one bristle bundle is inserted into a receiving hole 4 of the bristle carrier 1 and finally baked with this.
    The material projections 5 and the elevation 7 on the front side 3 of the bristle carrier 1 are softened and the material located therein is reduced to reduce the cross section of the at least one receiving hole 4, here all the receiving holes 4. In particular, the press die 31 described above can itself have a heating device with which its end face can be heated.
    The method described above can be carried out on a device 17 for producing a brush 2 and / or using a pressing tool 18, which is indicated only schematically in the figures, as is shown in FIGS. 7 to 10 and has been described previously.
    Thus, the at least one bristle 22 is first inserted into the receiving hole 4 with the press die 21 of the pressing tool 19 already mentioned and using the profile plate 28 and then fastened to the bristle carrier 1. At least when inserting into the receiving hole 4 of the bristle carrier 1, the at least one bristle 22 is sucked in and thereby held on the press ram 21 and the profile plate 28. For this purpose, the
    BE2018 / 5507
    Air connection 30 applied a negative pressure and transferred via the chamber 40 and the air channels 31 in the profile pins 29 of the profile plate 28, which protrude into the bristle receptacles 27 of the press die 21, to the bristle receptacles 27 and the bristles 22 or bristle bundles 23 arranged therein.
    After their attachment, the bristles 22 are released from the press ram 21 by blowing air through these air channels 31. If necessary, air can also be blown onto the bristle carrier 1 via the air channels 31 in order to cool it down after the bristles 22 have been fastened in the receiving holes 4.
    In a variant of the method, the at least one bristle 22 can preferably be melted at its fastening end 38 immediately before the bristle 22 is inserted into the receiving hole 4 of the bristle holder 1 provided for it. A thickening 39 can be produced at the respective fastening end 38, by means of which the bristles 22 of a bundle of bristles 23 are connected to one another on the one hand and, on the other hand, the bundle of bristles 23 can be fastened even more easily in the receiving hole 4 of the bristle holder 1.
    As already indicated above, the pressing tool 18, namely in particular the pressing die 21, at least one of the two mold halves 24 or 25 of the pressing mold 19 and the bristle carrier 1 and / or a thickening 39 generated at the attachment end 38 of a bristle 22 or a bristle bundle 23 can at least pre- the insertion of the bristles 22 or bundles of bristles 23 are heated. For this purpose, the previously mentioned and described in detail heating device 33 can be used.
    BE2018 / 5507
    The invention is concerned with improvements in the technical field of the production of brushes 2, in particular toothbrushes 2. For this purpose, a bristle carrier 1, also referred to as a carrier plate, is proposed, which has at least one material projection 5 on its front side 3 in addition to a plurality of receiving holes 4 , which is assigned to at least one of the receiving holes 4 and laterally delimits this along at least part of its circumference 6 and which projects beyond the front side 3 of the bristle carrier 1 surrounding it.
    BE2018 / 5507
    LIST OF REFERENCE NUMBERS
    bristle carrier
    brush
    front
    receiving hole
    material advantage
    Extent of 4
    Increase in 1 area from 3 to the edge
    Border area of 1
    Edge of 1
    Paragraph on 3rd
    plateau
    Transition area between 11 and 12
    Section of 3
    Deepening in 3rd
    brush body
    Device for making a brush
    press tool
    mold
    cavity
    press die
    bristle
    bristle bundles
    23a free bundle end of 23 first, lower mold half second, upper mold half
    Stamp opening in 25th
    Bristle shots in 21
    profile plate
    BE2018 / 5507
    profile pen
    29a end face of 29
    air connection
    air duct
    Restoring element / return spring
    Heater / heating plate
    heating surface
    heating surface
    Heater / heating cartridge
    cartridge receiver
    Fastening end from 22/23
    thickening
    chamber
    BE2018 / 5507
    权利要求:
    Claims (25)
    [1]
    1. Bristle carrier (1) made of plastic for a brush or toothbrush (2), the bristle carrier (1) on its front side (3) having a plurality of receiving holes (4) for bristle bundles, characterized in that the bristle carrier (1) its front side (3) has at least one material projection (5) which laterally delimits at least one of the receiving holes (4) along at least part of its circumference (6) and projects beyond the front side (3) of the bristle carrier (1) surrounding it.
    [2]
    2. bristle carrier (1) made of plastic for a brush or toothbrush (1), in particular according to claim 1, wherein the bristle carrier (1) on its front side (3) has a plurality of receiving holes (4) for bristle bundles, characterized in that the Bristle carrier (1) has an elevation (7) in an inner region (8) of its front side (3) that is distant from the edge and that detects several receiving holes (4) and that extends up to an edge region (9) or up to an edge (10) the front (3) of the bristle carrier (1) extends.
    [3]
    3. bristle carrier (1) according to claim 2, characterized in that a measurable over the edge (10) of the front (3) height of the elevation (7) in the course of the elevation (7) towards the edge region (9) or the edge (10) the front (3) of the bristle carrier (1), preferably continuously, decreases, and / or that the elevation (7) is surrounded by a shoulder (11) formed in the edge region (9) of the front (3) and a plateau (12) and a transition area (13), the transition area (13) connecting the plateau (12) to the shoulder (11) and falling in its course to the shoulder (11), preferably steadily.
    BE2018 / 5507
    [4]
    4. bristle carrier (1) according to claim 2 or 3, characterized in that the bristle carrier (1) in a portion (11) covered by the elevation (7), in particular in the region of the plateau (12), a greater material thickness than in one the edge region (9) surrounding the elevation (7), in particular in the region of the shoulder (11), the front side (3) or on the edge (10) of the bristle carrier (1).
    [5]
    5. bristle carrier (1) according to one of claims 2 to 4, characterized in that the elevation (7) is formed by a convex curvature of the front (3) of the bristle carrier (1).
    [6]
    6. bristle carrier (1) according to one of claims 2 to 5, characterized in that the elevation (7), in particular with its transition region (13), detects at least one receiving hole (4) located on the edge (10) of the bristle carrier (1) , and / or that the bristle carrier (1) has at least one recess (15) on its front side (3) which at least partially covers at least one receiving hole (4).
    [7]
    7. bristle carrier (1) according to one of claims 1 to 6, characterized in that all the receiving holes (4) on the front (3) of the bristle carrier (1) are at least partially covered by the elevation (7) and / or that Bristle carrier (1) consists of a thermoplastic.
    [8]
    8. Brush (2), in particular toothbrush (2), with a bristle carrier (1) equipped with bristle bundles according to one of claims 1 to 7.
    [9]
    9. A method for producing a brush (2) having a bristle carrier (1) made of thermoplastic with at least one
    BE2018 / 5507
    Receiving hole (4), in which at least one bristle made of thermoplastic plastic is inserted and fastened therein, wherein the at least one bristle is inserted with a fastening end into a receiving hole (4) of a bristle carrier (1) according to one of claims 1 to 7, after which the bristle carrier (1) is heated and pressed while reducing at least one cross-section of the receiving hole (4) and baked with the at least one bristle in such a way that the at least one bristle is attached to the bristle carrier (1).
    [10]
    10. The method according to claim 9, characterized in that the at least one material projection (5) and / or the elevation (7) on the front (3) softens and the material located therein to reduce the cross section of the at least one receiving hole (4) preferably is pushed into this.
    [11]
    11. The method according to any one of the preceding claims, characterized in that the at least one bristle (22) with a press ram (21) and / or using a profile plate (28) inserted into the receiving hole (4) and / or on the bristle carrier ( 1), and / or that the at least one bristle (22) is sucked into the receiving hole (4) at least when it is pushed in and is thereby held on the press ram (21) and / or the profile plate (28).
    [12]
    12. The method according to any one of the preceding claims, characterized in that the at least one bristle (22) is detached from one or the press ram (21) after being fastened by blowing in air, and / or that the bristle carrier (1) after the fastening the at least one bristle (22) is cooled, in particular by blowing in air.
    BE2018 / 5507
    [13]
    13. The method according to any one of the preceding claims, characterized in that the at least one bristle (22), preferably immediately before the insertion of the bristle (22) in the receiving hole (4) at its fastening end (38) melted and thereby one, in particular mushroom-shaped, thickening (39) is formed on the fastening end (38).
    [14]
    14. The method according to any one of the preceding claims, characterized in that a press tool (18), a press punch (21), at least one mold half (24, 25) of a press mold (19) and / or the bristle carrier (1) and / or Thickening (39) at the fastening end (38) of the at least one bristle (22) at least before the bristle (22) is pushed in, in particular with a heating device (33).
    [15]
    15. Device (17) for producing a brush (2), in particular a brush (2) according to claim 8, set up to carry out the method according to one of the preceding claims.
    [16]
    16. The device (17) according to claim 15, characterized in that the device (17) has a press tool (18) which has a press mold (19) with at least one mold cavity (20) for receiving a bristle carrier (1) and at least one press stamp (21).
    [17]
    17. Device (17) according to one of the preceding claims, characterized in that the compression mold (19) has two mold halves (24, 25), the at least one mold cavity (20) in a first mold half (24) of the two mold halves (24 , 25) and a second mold half (25) of the two mold halves (24, 25) comprises a punch opening (26) through which the press punch (21) for
    BE2018 / 5507
    A bristle carrier (1) arranged in the mold cavity (20) can be pressed through, in particular wherein the punch opening (26) has a smaller cross section than the mold cavity (20) for receiving the bristle carrier (1).
    [18]
    18. Device (17) according to one of the preceding claims, characterized in that the press ram (21) has at least one bristle holder (27).
    [19]
    19. Device (17) according to one of the preceding claims, characterized in that the pressing tool (18) has a profile plate (28) which is used to support at least one bristle (22) when inserted into a receiving hole (4) of a bristle carrier (1) and / or for specifying a desired position of the bristle (22) on the bristle carrier (1).
    [20]
    20. Device (17) according to any one of the preceding claims, characterized in that the profile plate (28) has at least one profile pin (29) or a plurality of profile pins (29), in particular in the number and arrangement of a number and arrangement of receiving holes ( 4) correspond to a bristle carrier (1) to be processed on the device (17) and / or bristle receptacles (27) of the press ram (21).
    [21]
    21. Device (17) according to one of the preceding claims, characterized in that the pressing tool (18) has an air connection (30) and / or that the pressing die (21) and / or the profile plate (28) has at least one air duct (31). has / have.
    [22]
    22. Device (17) according to one of the preceding claims, characterized in that each profile pin (29) of the profile plate (28)
    BE2018 / 5507 and / or each bristle holder (27) of the press ram (21) each has / have an air channel (31), and / or that each profile pin (29) in the use position of the profile plate (28) in a bristle holder (27) of the press ram (21) is arranged.
    [23]
    23. Device (17) according to one of the preceding claims, characterized in that the profile plate (28) against the restoring force of a restoring element (32), in particular a restoring spring (32), is movable relative to the press ram (21), preferably wherein the Restoring force is aligned in the pressing direction of the press ram (21).
    [24]
    24. Device (17) according to one of the preceding claims, characterized in that the device (17) has a heating device (33), in particular a heating plate (33), which one of the mold (19) and / or the mold cavity (19th ) facing heating surface (34) and / or a pressing surface (21) facing heating surface (35).
    [25]
    25. Device (17) according to one of the preceding claims, characterized in that the press mold (19) has at least one heating element (36), in particular wherein the at least one or at least one heating element (36) on or in the first mold half (24) and / or wherein the at least one or at least one heating element (36) is arranged or formed on or in the second mold half (25).
    类似技术:
    公开号 | 公开日 | 专利标题
    EP0405204B1|1994-09-07|Method and apparatus for forming zones or tufts of bristles
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    WO2021185988A1|2021-09-23|Bristle carrier, brush, and method for producing the bristle carrier and the brush
    DE3007608A1|1981-09-24|Tool holder with perforated plate - has hooked couplings above each hole in plate
    同族专利:
    公开号 | 公开日
    BE1025851A1|2019-07-23|
    DE102018111934A1|2019-02-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0150785A2|1984-02-01|1985-08-07|CORONET-WERKE Heinrich Schlerf GmbH|Method for binding bristles on a bristle carrier|
    EP0355412A1|1988-08-23|1990-02-28|CORONET-WERKE Heinrich Schlerf GmbH|Method for manufacturing brushware|
    EP0472857A1|1990-08-28|1992-03-04|CORONET-Werke Gesellschaft mit beschränkter Haftung|Method and apparatus for fixing bristle tufts to a plastic bristle carrier|
    US5224763A|1991-12-30|1993-07-06|The Procter & Gamble Company|Method of fastening bristle tufts to bristle carrier|
    DE19738256A1|1997-09-02|1999-03-11|Rueb F A Holding Gmbh|Method and device for producing bristle fields and bristle field produced therewith|
    DE102015111312C5|2015-07-13|2020-06-25|Gb Boucherie Nv|Method and device for making a brush|
    法律状态:
    2019-08-28| FG| Patent granted|Effective date: 20190730 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102017117506.7|2017-08-02|
    DE102017117506|2017-08-02|
    DE102018111934.8A|DE102018111934A1|2017-08-02|2018-05-17|Bristle carrier, brush, and method and apparatus for making brushes|
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