• 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:
    Fluid or semi-fluid feeding device and method and machine for decoration. The fluid or semi-fluid product feeding device comprises a tank (11) containing a fluid/semi-fluid product (L), product dispensing means (15), a pumping unit (13) connected to the tank (11) and to said means dispensers (15) with connection tubes (14, 16) and configured to transfer the product (L) from the tank (11) to the dispensing means (15), pressure measurement means (19) associated with the connection tubes (16) and a management and control unit (20) that controls the pumping unit (13), product flow measurement means (21) (L) to control the flow of the product and connected to the management unit and control (20) to maintain a substantially constant flow. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2757976A1
    申请号:ES201930952
    申请日:2019-10-30
    公开日:2020-04-30
    发明作者:Paolo Sighinolfi
    申请人:Paolo Sighinolfi；
    IPC主号:
    专利说明:

    [0001]
    [0002] Fluid or semi-fluid feeding device and method and machine for decoration
    [0003]
    [0004] SCOPE
    [0005]
    [0006] The present invention relates to a fluid or semi-fluid product feeding device used for the decoration, personalization or polychromatic finishing of objects, preferably with a flat surface.
    [0007]
    [0008] By way of example only, but not limitation, said flat surface objects can be made of ceramic material, such as ceramic tiles and plates or other similar objects.
    [0009]
    [0010] The present invention furthermore relates to a method of feeding said fluid or semi-fluid products and to a decoration machine comprising said feeding device.
    [0011]
    [0012] With the term "fluid or semi-fluid product" is understood, for example, an enamel, an ink or a paint, that is, any fluid or semi-fluid coloring product capable of contributing a certain coloration to the object to be decorated.
    [0013]
    [0014] STATE OF THE ART
    [0015]
    [0016] Fluid or semi-fluid product feeding devices are known comprising a mixing bucket, configured to contain and keep the product stirring, a pumping unit fluidly connected to the bucket through a first tube, and a dispenser, fluidly connected to the pumping unit through a second tube, and through which the fluid / semi-fluid product is applied to the object to be decorated.
    [0017]
    [0018] In particular, the dispenser has an outlet section appropriately designed to obtain a constant and defined spray area, which depends on the shape and size of the object to be decorated, and on the decoration to be printed on it.
    [0019]
    [0020] In the ceramic sector, the fluid / semi-fluid coloring products used for tile decoration typically have a fairly high density and viscosity high, in order to promote adhesion to the surface to be colored of the fluid / semi-fluid product after the coloring process.
    [0021]
    [0022] On the other hand, the fluid / semi-fluid coloring products contain, in suspension, microparticles that may also have abrasive characteristics, for example to provide the object in question with an intentional surface roughness.
    [0023]
    [0024] Especially in this case, the fluid / semi-fluid coloring product sprayed at high pressure and speed can cause wear phenomena or structural damage to both the second tube and the dispenser.
    [0025]
    [0026] In fact, the latter is particularly subject to wear since it has a narrow outlet section, in order to conveniently direct the flow of the fluid / semi-fluid product to the object to be decorated.
    [0027]
    [0028] A drawback of the systems of the known art is determined by the fact that the fluid or semi-fluid coloring products, due to their characteristics mentioned in the previous paragraphs, that is, viscosity, presence of abrasive particles, deform, widening, the section of dispenser outlet.
    [0029]
    [0030] This widening modifies the spray area on the object to be decorated, which is reached by the fluid / semi-fluid coloring product, compromising the aesthetic result of the decoration.
    [0031]
    [0032] The known feeding devices may also comprise a fluid / semi-fluid product pressure sensor, configured to detect the value of the fluid / semi-fluid pressure at the bottom of the pumping unit, that is, inside the second tube .
    [0033]
    [0034] The pressure sensor is typically connected to a management and control unit, which serves to manage the operation of the said pumping unit.
    [0035]
    [0036] The management and control unit is configured to receive the pressure value detected by the pressure sensor and can produce an operational signal that will be sent to the pumping unit, in order to keep the pressure of the fluid / semi-fluid product constant in the inside the second tube, so that the feeding device works at a constant pressure.
    [0037] In particular, the management and control unit typically comprises a derivative integral proportional circuit (PID) that processes the operating signal that will be sent to the pumping unit based on the difference between the pressure detected by the pressure sensor and a value of predefined reference.
    [0038]
    [0039] The solutions of the known technique that we have just described have some drawbacks.
    [0040]
    [0041] A drawback of fluid / semi-fluid feeding devices operating at constant pressure resides in the fact that due to the deformation, that is, the widening of the outlet section of the dispenser, the pressure of the fluid inside the second tube tends to decrease progressively over time.
    [0042]
    [0043] Consequently, the management and control unit automatically generates an operating signal to increase the pressure of the fluid / semi-fluid product, to compensate for the decrease in pressure and to bring the pressure back to the predetermined reference value.
    [0044]
    [0045] This operational signal determines an increase in the fluid / semi-fluid flow, which, in addition to not guaranteeing the aesthetic purpose of the decoration, is sprayed in greater quantities, with significant economic waste.
    [0046]
    [0047] Another drawback, related to the waste of fluid / semi-fluid coloring product, is that they increase the costs for its elimination, since it is a highly polluting chemical product.
    [0048]
    [0049] In order to guarantee the aesthetic performance of the product, it is therefore necessary to constantly maintain the dispensers.
    [0050]
    [0051] Maintenance, in the current state of the art, is only performed when the dispensers malfunction is verified, which in this case occurs as a result of visual detection of the damaged dispenser by an expert operator.
    [0052]
    [0053] Damage detection can also occur indirectly, thanks to the visual analysis, always by an expert operator, of the spray area generated on the surface of the object to be decorated.
    [0054] Currently, therefore, it is only possible to instrumentally detect the presence of wear phenomena of the dispensers that modify the outlet section of the latter, with a visual control of an operator, because the pressure value of the fluid / semi-fluid product, in the inside of the second tube, detected by the pressure sensor, is immediately corrected by the management and control unit in the way we have described.
    [0055]
    [0056] Another drawback is that machine stops can occur at unpredictable moments in the decoration cycle and with a non-constant rate, which prevents effective and rapid scheduled maintenance interventions and requires the blocking of industrial decoration cycles.
    [0057]
    [0058] An objective of the present invention is to make a device for feeding fluid or semi-fluid products that allows one or more of the indicated drawbacks to be solved.
    [0059]
    [0060] Another objective of the present invention is to make a device for feeding fluid or semi-fluid products that allows the wear status of the dispenser to be automatically monitored and eventually to report any malfunctions associated with it.
    [0061]
    [0062] Yet another objective of the present invention is to make a device for feeding fluid or semi-fluid products that can apply the intended decoration to the objects in question.
    [0063]
    [0064] Yet another objective of the present invention is to realize a fluid or semi-fluid product feeding device capable of minimizing the waste of fluid / semi-fluid coloring product used for decoration.
    [0065]
    [0066] Another objective of the present invention is to make a device for feeding fluid or semi-fluid products that enables predictive maintenance to be incorporated. In this way it is possible to anticipate a possible failure, or the moment when the wear of the dispenser is about to exceed a limit value, above which the fluid / semi-fluid coloring product feeding device cannot provide the objects in question the desired decoration.
    [0067]
    [0068] In this way it is possible to conveniently schedule maintenance interventions, with the consequent reduction of machine stops and increased productivity.
    [0069] To obviate the drawbacks of the known technique and achieve these and other purposes and advantages, the Applicant company has studied, experimented and carried out the present invention.
    [0070]
    [0071] STATEMENT OF THE INVENTION
    [0072]
    [0073] The details and features of the invention are set out in the independent claims.
    [0074]
    [0075] The dependent claims set forth other features of the invention or variants of the main solution idea.
    [0076]
    [0077] In accordance with the objectives set forth above, a fluid or semi-fluid coloring product feeding device according to claim 1 has been provided.
    [0078]
    [0079] An advantage of the feeding device according to the invention is that, by keeping the product flow rate constant in the second tube, the pressure measuring means provide a pressure signal that indicates the wear state of the dispenser.
    [0080]
    [0081] Advantageously, the pressure measuring means quickly detects whether faults or malfunctions have occurred in the operation of the dispenser.
    [0082]
    [0083] Therefore, according to the invention, a fluid or semi-fluid product feeding device can be obtained that minimizes product waste and reduces the possibility of causing aesthetic defects in the decoration, with the consequent increase in productivity.
    [0084]
    [0085] By way of example only, said fluid or semi-fluid product feeding device can be used to decorate ceramic tiles and plates.
    [0086]
    [0087] In accordance with other aspects of the present invention, a method for decorating objects is obtained, and an object decoration machine, where it is foreseen to use a feeding device according to the present invention.
    [0088]
    [0089] ILLUSTRATION OF THE DRAWINGS
    [0090] These and other features of the invention will become clear in the following description of embodiments, given by way of example, not limitation, in relation to the attached figure which schematically illustrates a fluid or semi-fluid product feeding device according to the present invention.
    [0091]
    [0092] It is understood that elements and features of one embodiment can be conveniently incorporated into other embodiments without new specifications.
    [0093]
    [0094] DESCRIPTION OF FORMS OF REALIZATION
    [0095]
    [0096] Referring to Figure 1, a device for feeding fluid or semi-fluid coloring products can be seen, indicated as a whole with reference number 10.
    [0097]
    [0098] According to embodiments of the invention, the fluid or semi-fluid feeding device 10 is configured to dispense a fluid / semi-fluid L on at least one surface of a flat object O to decorate the latter, that is, to provide it with certain characteristics, by a For example, a certain decoration or a desired surface roughness.
    [0099]
    [0100] The fluid / semi-fluid product L can be precisely pigmented to give the decoration a certain color, and can be chosen from a group comprising enamels, inks, paints or other similar or assimilable fluid / semi-fluid products.
    [0101]
    [0102] The fluid / semi-fluid product L can have a variable density between approximately 1000 kg / m3 and 2000 kg / m3 and a variable viscosity between approximately 0.368 and 1,106 poise.
    [0103]
    [0104] Furthermore, the fluid / semi-fluid product L may contain, dispersed therein, solid microparticles configured to provide particular characteristics to the surface of the flat object O.
    [0105]
    [0106] The feeding device 10 is configured to decorate objects made of different materials or better, object O can be made of ceramic, metal, plastic, paper or other material, including fabrics.
    [0107]
    [0108] The flat object O, in the illustrated example presented as a square ceramic tile, is typically placed on conveyor means 28, configured by example as belts or conveyor belts of the known art that advance it in the direction indicated in the figure by arrow F.
    [0109]
    [0110] Said feeding device 10 comprises at least one tank 11, with a sufficient capacity, suitable for containing the fluid / semi-fluid product L.
    [0111]
    [0112] The tank 11 can be configured as a closed or open tray at the top, or it can be associated with a lid (not shown) in order to avoid drying, or partial drying, of the fluid / semi-fluid product L.
    [0113]
    [0114] Furthermore, the tank 11 can be equipped with means for removing 12, of a type known in the art, the fluid / semi-fluid product L contained therein.
    [0115]
    [0116] According to possible embodiments, the tank 11 can have spaces inside it separated from each other to allow one or more fluids / semi-fluids L.
    [0117]
    [0118] According to possible embodiment variants, the tank 11 can incorporate thermoregulatory means configured to timely control the density and the viscosity of the fluid / semi-fluid product L.
    [0119]
    [0120] The feeding device 10 also comprises a pumping unit 13 associated with the tank 11 through a first tube 14.
    [0121]
    [0122] The first tube 14 allows the fluid / semi-fluid product L to pass from the reservoir 11, located at a first end 24 of the first tube 14, to the pumping unit 13, located at a second end 25 of the first tube 14.
    [0123]
    [0124] The pumping unit 13 is designed to send the fluid / semi-fluid product L at least to a dispenser 15 by means of a second tube 16.
    [0125]
    [0126] The second tube 16 leads the fluid / semi-fluid product L from the pumping unit 13, located at a first end 26 of the second tube 16, to at least one dispenser 15, located at a second end 27 of the second tube 16.
    [0127]
    [0128] In accordance with one aspect of the invention, the dispenser 15 is configured to spray a predetermined amount of fluid / semi-fluid product L on at least a part of the surface of the flat object O that is to be decorated.
    [0129] Typically, the supply of the fluid / semi-fluid product L is carried out from above, since the dispenser 15 is located at the top and is oriented substantially perpendicular to the surface of the object O to be decorated.
    [0130]
    [0131] The dispenser 15 can have at least one outlet section 17 appropriately designed and dimensioned to obtain a chosen spray zone 18 on the surface of the flat object O that is to be decorated.
    [0132]
    [0133] The spray zone 18 has relative dimensions, shape and position with respect to the object O to be decorated, which are determined in the design phase, and which correspond directly to the outlet section 17.
    [0134]
    [0135] In some embodiments, dispenser 15 may have a plurality of selectively selectable and mutually selectable outlet sections 17 in order to obtain distinct shapes of spray area 18.
    [0136]
    [0137] Although in the illustrations of the embodiments the spray area 18 has an elliptical shape, other shapes can be envisaged, such as circular, square, rectangular or others of varied perimeter.
    [0138]
    [0139] Due to the phenomenon of wear and tear, after a variable time interval that depends on the hours of operation of the feeding device 10, the dispenser 15 can have a larger outlet section 17 with respect to the corresponding section in the initial operating conditions.
    [0140]
    [0141] For this reason, a spraying area 18 is obtained with a shape and dimensions different from those desired and, consequently, an incorrect decoration of the flat object O is obtained.
    [0142]
    [0143] The feeding device 10, according to the present invention, also comprises pressure measuring means 19, associated with the second tube 16, configured to detect the pressure value of the fluid / semi-fluid product L in said tube.
    [0144]
    [0145] In accordance with the embodiments of the present invention, the feeding device 10 comprises a management and control unit 20, configured to manage the operation of the pumping unit 13.
    [0146] In particular, the control unit 20 is configured to generate an operational signal that will be sent to the pumping unit 13.
    [0147]
    [0148] Said signal can be generated, for example, by an integral proportional controller (PI) or a derivative integral proportional circuit (PID).
    [0149]
    [0150] According to an aspect of the invention, the pressure measuring means 19 can be operatively associated with the management and control unit 20, as illustrated in Figure 1.
    [0151]
    [0152] In this case, the management and control unit 20 may include storage means, not shown, configured to store the pressure values of the fluid / semi-fluid product L measured by the pressure measurement means 19 in predetermined periods of time, in order to assess the evolution of the pressure of the fluid / semi-fluid product L inside the second tube 16 for a long time.
    [0153]
    [0154] According to a variant embodiment, not illustrated, said pressure measuring means 19 can be independent, that is, not associated with the management and control unit 20.
    [0155]
    [0156] In this case, the pressure measuring means 19 can be configured as a manometer provided with display means, not illustrated, configured to allow the visualization of the instantaneous value of the fluid / semi-fluid pressure L by an operator.
    [0157]
    [0158] According to possible variants of embodiment, the display means can be physically connected to the pressure measurement means 19 or be associated with a mobile device, used by the operators, with a wireless connection to the pressure measurement means 19.
    [0159]
    [0160] According to a characteristic aspect of the present invention, the supply device 10 also comprises flow measurement means 21, preferably associated with the second tube 16 to measure the flow value of the fluid / semi-fluid product L.
    [0161]
    [0162] According to the embodiments, the flow measurement means 21 can also be located in the first tube 14, immediately above the pumping unit 13 (see the broken line in Figure 1) and associated with the flow unit. management and control 20, to which they send the detected flow value of the fluid / semi-fluid product L.
    [0163]
    [0164] By way of non-limiting example, the flow measurement means 21 can be chosen from a group comprising electromagnetic, numbered disk, gear, lobe, volumetric meters.
    [0165]
    [0166] In a possible way of using the feeding device 10, the management and control unit 20, through the values measured by the flow measurement means, acts on the pumping unit 13 in order to have a controlled flow of the fluid / semi-fluid L inside the second tube 16.
    [0167]
    [0168] In fact, in case the flow rate of the fluid / semi-fluid product L is constant, if the outlet section 17 increases due to wear, a decrease in the pressure of the fluid / semi-fluid product L occurs inside the second tube 16, which is detected by the pressure measuring means 19.
    [0169]
    [0170] According to an embodiment, through the display means associated with the pressure measuring means 19, an operator can check the change in the pressure value and, consequently, stop the feeding device 10 to replace the dispenser 15 .
    [0171]
    [0172] As an alternative, according to a variant, the management and control unit 20, through the pressure measuring means 19, is capable of evaluating if the pressure value of the fluid / semi-fluid product L is approaching a preset threshold value and, accordingly, it can automatically stop the feeding device 10 and indicate the need to replace the dispenser 15.
    [0173]
    [0174] Other embodiments of the invention also refer to a fluid or semi-fluid feeding method L related to the feeding device embodiments 10 described above, which provides:
    [0175]
    [0176] - the aspiration by the pumping unit 13 of the fluid / semi-fluid product L, located in the tank;
    [0177] - the transfer of the fluid / semi-fluid product L from the tank 11 to the dispenser 15, through connection tubes;
    [0178] - the measurement of the flow rate of the fluid / semifluid product L inside a section of the connection tubes comprised between the pumping unit and the dispenser 15 through the flow measurement means 21;
    [0179] - control of the flow of the fluid / semi-fluid product, thanks to the actuation of the pumping unit by the management and control unit, depending on the values measured by the flow measurement means, to keep the product flow constant fluid / semi-fluid at least in said section of the connection tubes;
    [0180] - monitoring the pressure of the fluid / semi-fluid product inside the said section through the pressure measuring means.
    [0181]
    [0182] Other embodiments also refer to a decoration machine for decorating flat objects OR, for example ceramic tiles.
    [0183]
    [0184] According to the invention, the decoration machine (not shown) comprises at least one fluid or semi-fluid product feeding device 10 according to the present invention, and is provided with conveyor means 28 that move objects O in the direction indicated by arrow F .
    [0185]
    [0186] It is clear that modifications and / or additions can be made to the feeding device 10, the corresponding feeding method and the corresponding decorating machine described heretofore, without thereby leaving the scope of the present invention.
    [0187]
    [0188] It is also understood that, although the invention has been described with reference to specific examples, a person skilled in this field will obviously be able to make many other equivalent forms of a feeding device 10, of the corresponding feeding method and of the corresponding machine for decorate, having the characteristics expressed in the claims and therefore included in the scope of protection defined by the latter.
    权利要求:
    Claims (8)
    [1]
    1. A fluid or semi-fluid product feeding device comprising a tank (11) suitable for containing a fluid / semi-fluid product (L), dispensing means (15) for said fluid / semi-fluid product, a pumping unit (13) connected to said reservoir (11) and said dispensing means (15) through connection tubes (14, 16) and configured to transfer said fluid / semi-fluid product (L) from said reservoir (11) towards said dispensing means (15), means for measuring pressure (19) associated with said connection tubes (14, 16), and a management and control unit (20) configured to control said pumping unit (13), said feeding device being characterized by the fact that further comprising means for measuring the flow rate (21) of the fluid / semi-fluid product (L), configured to control the flow of the fluid / semi-fluid product and connected to said management and control unit (20), so that the latter controls said pumping unit (13) to maintain a substantially constant flow rate of said fluid / semi-fluid product (L) at least in a section of said connection tubes (14, 16) that extends between said pumping unit (13) and discs dispensing means (15).
    [2]
    2. Feeding device according to claim 1, wherein said pressure measuring means (19) are connected to the management and control unit (20).
    [3]
    3. Feeding device according to claim 2, wherein said control unit (20) comprises memorizing means, configured to memorize the pressure values of the fluid / semi-fluid product (L) measured by the pressure measuring means (19).
    [4]
    4. Feeding device according to any one of the preceding claims, wherein said management and control unit (20) is configured to stop the feeding device, intervening in the pumping unit (13), if the pressure value of the fluid / semi-fluid product (L) detected by said pressure measurement means (19) reaches a predetermined threshold value.
    [5]
    5. A feeding device according to claim 1, wherein said pressure measuring means (19) comprises display means showing the operator a detected pressure value.
    [6]
    6. Feeding device according to claim 5, wherein said means of display are connected to the pressure measuring means (19) with a wired connection or with a wireless connection.
    [7]
    7. Method for feeding fluid or semi-fluid products in a feeding device as in any one of the preceding claims, which includes the steps of:
    - sucking, by means of the pumping unit (13), said fluid / semi-fluid product (L), located in said tank (11);
    - transferring said fluid / semi-fluid product (L) from said tank (11) towards said dispensing means (15), with connection tubes (14, 16);
    characterized by the fact that the method also includes the phases of:
    - measuring the flow rate of the fluid / semi-fluid product (L) inside a section of said connection tubes (16) comprised between said pumping unit (13) and said dispensing means (15) through said means for measuring the caudal (21);
    - controlling the flow of the fluid / semi-fluid product, by actuating said pumping unit (13) by said management and control unit (20), depending on the values detected by the flow measurement means (21) , to maintain constant the flow rate of the fluid / semi-fluid product at least in a section of said connection tubes (14, 16) that extends between said pumping unit (13) and said dispensing means (15); - monitoring the pressure of the fluid / semi-fluid product (L) inside said section through said pressure measurement means (19).
    [8]
    8. Decoration machine characterized in that it comprises at least one fluid or semi-fluid product feeding device as in any one of claims 1 to 6, and in that it is provided with conveyor means (28 ) suitable for moving objects (O) to be decorated near said dispensing means (15) so that the latter can supply the fluid / semi-fluid coloring product in at least one spraying area (18) comprised on the surface to decorate of said objects (O).
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    同族专利:
    公开号 | 公开日
    IT201800009935A1|2020-05-01|
    ES2757976B2|2021-10-25|
    引用文献:
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    优先权:
    申请号 | 申请日 | 专利标题
    IT102018000009935A|IT201800009935A1|2018-10-31|2018-10-31|DEVICE AND METHOD FOR FEEDING FLUIDS OR SEMI-FLUIDS AND RELATED DECORATION MACHINE|
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