Pad printer

Abstract

This invention discloses a pad printing machine, comprising: a feeding plate with a plurality of feeding grooves; a support fixture located at the discharge end of the feeding plate for receiving materials on the feeding plate, the support fixture having a plurality of negative pressure suction heads, the support fixture being driven by a first driving mechanism for vertical movement; a blocking fixture having a plurality of U-shaped grooves, the negative pressure suction heads being disposed in the U-shaped grooves, the groove walls of the U-shaped grooves being used to block the materials on the support fixture, the blocking fixture being driven by a second driving mechanism for vertical movement relative to the support fixture; and a pressing mechanism located below the feeding plate, including a pressing plate and a third driving mechanism, the third driving mechanism driving the pressing plate to extend and retract laterally, causing the pressing plate to move closer to or away from the support fixture. This eliminates the need to remove the materials from the support fixture, avoiding material deflection or displacement, resulting in high working efficiency, accurate pad printing, and a low defect rate.

Description

Technical Field

[0001] This invention relates to the field of pad printing machines, and more specifically to a pad printing machine. Background Technology

[0002] Pad printing machines are devices that use concave pads to print patterns onto small objects. Taking inductor products as an example, pad printing machines are used to transfer silver paste onto the surface of the inductor to form conductive electrodes.

[0003] Specifically, taking NR inductors (magnetic adhesive inductors) as an example, the working process of existing NR inductor pad printing machines generally includes feeding, transferring, pad printing, drying, and collecting. Inductor components are fed via a feeding plate with several feeding slots, the size and shape of which match the inductors. The inductors enter the carrier fixture from the feeding plate. The carrier fixture positions the inductors, ensuring their orientation. To improve efficiency, multiple inductors (more than ten) can be carried on the carrier fixture simultaneously. These inductors are arranged neatly at a certain distance according to design requirements. The carrier fixture itself is stationary; it only receives material from the feeding plate. Then, a negative pressure suction mechanism moves above the carrier fixture, descends to contact and absorb the upper surface of the inductors, and transfers multiple inductors simultaneously to the printing fixture for the pad printing process. A fork extends and positions the inductors on the printing fixture. Subsequently, a pad printing head coated with silver paste descends and prints the silver paste onto the surface of the inductors.

[0004] In existing technologies, after the inductor is positioned on the carrier fixture, it needs to be transferred using a negative pressure adsorption mechanism. This can easily lead to the following problems: ① The adsorption force of the negative pressure adsorption mechanism is used to overcome the inductor's own weight. After the pad printing machine has been used for a period of time, the adsorption force of the negative pressure adsorption mechanism may become insufficient or uneven. This can result in the inductor not being able to be completely removed from the carrier fixture when adsorbing material, thus affecting work efficiency; ② The inductor needs to go through three processes from the feeding plate to the pad printing process: fixture positioning, adsorption and transfer, and fork positioning. During the adsorption and transfer process, inductors are easily deflected or displaced. This causes the center distance between adjacent inductors to change and become inconsistent after the inductor is transferred to the printing fixture. When the fork is positioned to insert the inductor into the printing fixture (meaning the fork is inserted into the gap between adjacent inductors), the fork may fail to insert or may experience tooth knocking. In particular, even if the fork can be inserted, the inductor may have already deflected, causing the silver paste to be unable to be accurately printed at the set position of the inductor, which seriously affects the transfer printing quality of the inductor.

[0005] Therefore, it is necessary to improve and optimize existing pad printing machines. Summary of the Invention

[0006] The present invention aims to solve at least one of the aforementioned problems of the prior art. To this end, the present invention provides a pad printing machine that eliminates the need to remove the workpiece from the carrier fixture, thus avoiding workpiece deflection or displacement, resulting in high working efficiency, accurate pad printing position, and low defect rate.

[0007] This invention provides a pad printing machine, comprising:

[0008] A feeding plate, wherein the feeding plate is provided with a plurality of feeding slots;

[0009] The support fixture is located at the discharge end of the feeding plate and is used to receive the material on the feeding plate. The support fixture has several negative pressure suction heads. The support fixture is driven by a first driving mechanism, which drives the support fixture to move up and down.

[0010] A material blocking fixture has several U-shaped grooves. The negative pressure adsorption head is disposed in the U-shaped grooves. The groove walls of the U-shaped grooves are used to block the material on the supporting fixture. The material blocking fixture is driven by a second driving mechanism, which drives the material blocking fixture to move up and down relative to the supporting fixture.

[0011] The pressing mechanism is located below the feeding plate and includes a pressing plate and a third driving mechanism. The third driving mechanism drives the pressing plate to extend and retract laterally, so that the pressing plate moves closer to or further away from the supporting fixture.

[0012] Optionally, the upper end face of the U-shaped groove is recessed to form a platform.

[0013] Optionally, the bearing fixture is mounted on the first support, the second drive mechanism is fixedly connected to the first support, the first support is provided with a clearance groove, and also includes a connecting plate, the connecting plate is located in the clearance groove, one end of the connecting plate is fixedly connected to the blocking fixture, and the other end is fixedly connected to the output end of the second drive mechanism, the second drive mechanism drives the blocking fixture to move up and down through the connecting plate.

[0014] Optionally, the second drive mechanism is disposed on the side of the first support near the feeding plate. A first slider and a first slide rail are disposed on the first support on the side of the second drive motor. The output end of the second drive mechanism is fixed to the connecting plate through the first slider, and the first slider is fixed to the connecting plate.

[0015] Optionally, it also includes a second support, the first support being slidably connected to the second support and driven by the first drive mechanism fixed to the second support; it also includes a fourth drive mechanism, the output end of which is connected to the second support, the fourth drive mechanism driving the second support to move laterally, so as to move the bearing fixture closer to or away from the feeding plate.

[0016] Optionally, there is a gap between the first support and the second support to accommodate the second slider and the second slide rail. The first support is slidably connected to the second support through the second slider and the second slide rail. The first drive mechanism is at least partially disposed in the gap.

[0017] Optionally, it also includes a third support, on which two second supports are provided. Each second support is provided with a first support, a bearing fixture, and a material blocking fixture. The third support is driven by a fifth drive mechanism, which drives the third support to move longitudinally, so that the bearing fixtures on the two second supports alternately approach the feeding plate to receive material.

[0018] Optionally, the feeding plate includes an inclined feeding plate and an arc-shaped feeding plate connected to the inclined feeding plate; or the feeding plate is horizontally arranged and the feeding plate is driven by a vibrator to form a vibrating plate.

[0019] Optionally, the pressing end of the pressure plate is provided with an elastic component.

[0020] Optionally, the elastic component is an adhesive strip, which is disposed in a slot provided on the pressure plate, or the adhesive strip is bonded and fixed on the pressure plate; or the elastic component is a spring and a pressure plate disposed at the end of the spring.

[0021] The beneficial effects of this invention are as follows: In this embodiment, a retaining fixture is provided at the position of the supporting fixture. Both the supporting fixture and the retaining fixture are vertically movable. The retaining fixture has a U-shaped groove, and a negative pressure suction head on the supporting fixture is positioned within the U-shaped groove. When receiving material from the feeding plate, the retaining fixture can rise until the groove wall of the U-shaped groove is higher than the negative pressure suction head. The groove wall of the U-shaped groove blocks the material, thus positioning the material on the supporting fixture. After receiving the material, the supporting fixture lowers the material to the pressure plate position. Simultaneously, the retaining fixture lowers until the upper surface of the material is exposed above the retaining fixture. The pressure plate applies force to the side of the material, ensuring that the materials on the supporting fixture are neatly arranged. This invention enables silver paste printing to be completed directly on the substrate, eliminating the need for the existing method of using a negative pressure adsorption mechanism to pick up the substrate from the substrate and then transfer it. This avoids issues such as incomplete substrate gripping and substrate deflection during the adsorption, gripping, and transfer process, and also avoids problems such as the inability of the fork to insert or tooth breakage found in existing pad printing machines. In this embodiment, because the center distance between adjacent substrates on the substrate remains consistent and the position is accurate, precise printing is achieved, and the working efficiency of the pad printing machine is improved. Compared with existing pad printing machines, the pad printing machine described in this embodiment has a simpler structure and reduces the manufacturing cost. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the support fixture and related parts in an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A magnified view of part A in the image;

[0024] Figure 3 yes Figure 1 Another perspective illustration;

[0025] Figure 4 yes Figure 1 A partial exploded view (the angle of placement is slightly different);

[0026] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure after concealing the second support, load-bearing fixture, and other structures (and...). Figure 1 (Different placement angles)

[0027] Figure 6 yes Figure 5 Another perspective illustration;

[0028] Figure 7 yes Figure 5 A schematic diagram of the three-dimensional structure after concealing the first support, the material stop fixture, and other structures (and) Figure 5 (Different placement angles)

[0029] Figure 8 yes Figure 7 Another perspective illustration;

[0030] Figure 9 This is a three-dimensional structural diagram of the support fixture in an embodiment of the present invention;

[0031] Figure 10 This is a three-dimensional structural diagram of the material-blocking fixture in an embodiment of the present invention;

[0032] Figure 10-1 yes Figure 10 A magnified view of a portion of G;

[0033] Figures 11-12 This is a three-dimensional structural diagram of the first support (part) at two angles in an embodiment of the present invention;

[0034] Figure 13 This is a three-dimensional structural diagram of the feeding plate and other structures in an embodiment of the present invention;

[0035] Figure 14 yes Figure 13 A schematic diagram of the side projection;

[0036] Figure 15This is a three-dimensional structural diagram of the pressure plate and the third driving structure in an embodiment of the present invention;

[0037] Figure 16 yes Figure 15 A magnified view of part B in the image;

[0038] Figure 17 This is a three-dimensional structural diagram of an embodiment of the present invention, including a support fixture, a feeding plate, and other structures.

[0039] Figure 18 yes Figure 17 A magnified view of part C;

[0040] Figure 19 yes Figure 17 A schematic diagram of the side projection;

[0041] Figure 20 yes Figure 19 A magnified view of part D (with pattern filling on some parts to facilitate differentiation of components).

[0042] Figure 21 This is a three-dimensional structural diagram of an embodiment of the present invention including a third support;

[0043] Figure 22 yes Figure 21 A magnified view of part E in the image;

[0044] Figure 23 yes Figure 22 A magnified view of part F.

[0045] Reference numerals: 10-Feeding plate, 11-Feeding trough, 12-Inclined feeding plate, 13-Arc-shaped feeding plate, 20-Bearing fixture, 21-Negative pressure adsorption head, 22-First slider, 23-First slide rail, 30-Blocking fixture, 31-U-shaped groove, 33-Sinking platform, 32-Connecting plate, 40-Pressure mechanism, 41-Pressure plate, 42-Glue strip, 43-Card slot, 50-First support, 51-Second slider, 52-Second slide rail, 53-Leaning through groove, 60-Second support, 70-Third support, 71-Third slide rail, 80-Inductor, 101-First drive mechanism, 102-Second drive mechanism, 103-Third drive structure, 104-Fourth drive structure, 105-Fifth drive mechanism. Detailed Implementation

[0046] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, inside, outside, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0048] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0049] In the description of this invention, unless otherwise explicitly defined, terms such as setting, installing, connecting, assembling, and cooperating should be interpreted broadly, and those skilled in the art can reasonably determine the meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0050] The present invention will now be described using NR inductor products as an example to facilitate understanding by those skilled in the art. Here, "vertical" refers to the Z-direction, "lateral" refers to the X-direction, and "vertical" refers to the Y-direction.

[0051] See details Figures 1-23As shown, an embodiment of the pad printing machine of the present invention includes a feeding plate 10, on which a plurality of feeding grooves 11 are provided; a supporting fixture 20, located at the discharge end of the feeding plate 10, is used to receive the material, namely an NR inductor, on the feeding plate 10. The supporting fixture 20 has a plurality of negative pressure suction heads 21, each with air holes. The air holes are connected to a negative pressure generating mechanism through air channels and air pipes, thereby generating negative pressure in the air channels. The material above the air holes is reliably fixed on the negative pressure suction heads 21, allowing the material on the supporting fixture 20 to move with the supporting fixture; the supporting fixture 20 is driven by a first driving mechanism 101, which drives the supporting fixture 20 to move up and down. Lifting and lowering mechanism; a material blocking fixture 30, which has several U-shaped grooves 31, with the negative pressure adsorption head 21 disposed in the U-shaped grooves 31. The groove walls of the U-shaped grooves 31 are used to block the material on the supporting fixture 20. The material blocking fixture 30 is driven by a second driving mechanism 102, which drives the material blocking fixture 30 to move up and down relative to the supporting fixture 20; a pressing mechanism 40, disposed below the feeding plate 10, includes a pressing plate 41 and a third driving mechanism 103. The third driving mechanism 103 drives the pressing plate 41 to extend and retract laterally, so that the pressing plate 41 moves closer to or away from the supporting fixture 20, so as to press the material on the supporting fixture 20, making the multiple material on the supporting fixture 20 neat. When receiving material from the feeding plate 10, the negative pressure suction head 21 is flush with the bottom wall of the feeding trough 11, allowing the inductor in the feeding trough 11 to slide smoothly onto the negative pressure suction head 21. Then, the negative pressure suction head 21 generates a negative pressure suction force to hold the inductor in place. Then, the second drive mechanism 102 drives the material blocking fixture 30 to descend, so that the upper surface of the inductor is exposed from the U-shaped groove 31. At the same time, the first drive mechanism 101 drives the carrying fixture 20 to descend to a predetermined position. The third drive mechanism 103 is activated, and the pressure plate 41 presses down on the side of the inductor, so that multiple inductors are aligned in a straight line on the carrying fixture 20. At this time, the pad printing head only needs to move to directly above the inductor and press down to complete the printing. The pad printing head can reciprocate between the two stations of applying silver paste and printing silver paste through a motor screw and a slide rail slider mechanism. This is a well-known technology in the art and will not be described in detail here.

[0052] See details Figure 10 , Figure 10-1 As shown, in some embodiments of the present invention, the upper end face of the U-shaped groove 31 is recessed to form a recessed platform 33. For NR inductors, when printing silver paste, it is necessary to print about 1 / 3 of the inductor height on the side of the inductor. However, the pad printing head is a soft pad, which deforms during printing. Therefore, by setting the recessed platform 33, the side wall of the recessed platform 33 is used to limit the deformed pad printing head, so that the deformation of the pad printing head is controlled, ensuring that the silver paste printed on the side wall of the inductor is straight and improving the printing quality.

[0053] In some embodiments of the present invention, the supporting fixture 20 is mounted on the first support 50. In this embodiment, for example... Figure 1 , Figure 3 and Figure 4 As shown, the first support 50 is inverted L-shape. To facilitate the manufacture of the first support 50, it is divided into two parts, which are connected by screws to form an L-shape. The second drive mechanism 102 is fixedly connected to the first support 50, specifically by screw fixing; see details below. Figures 4-8 , Figure 11 , Figure 12 , Figure 20 As shown, the first support 50 is provided with a clearance groove 53 that runs vertically through the entire structure. It also includes a connecting plate 32 located within the clearance groove 53. One end of the connecting plate 32 is fixedly connected to the material stop fixture 20, and the other end is fixedly connected to the output end of the second drive mechanism 102. The second drive mechanism 102 drives the material stop fixture 30 to move up and down via the connecting plate 32. The clearance groove 53 and the connecting plate 32 allow for a concealed design of the connecting plate 32, resulting in a more compact overall layout and facilitating the miniaturization of the pad printing machine.

[0054] In some embodiments of the present invention, the second driving mechanism 102 is disposed on the side of the first support 50 near the feeding plate 10. A first slider 22 and a first slide rail 23 are disposed on the first support 50 on the side of the second driving motor 102. The output end of the second driving mechanism 102 is fixed to the connecting plate 32 via the first slider 22, and the first slider 22 is fixed to the connecting plate 32. This structure conceals the second driving mechanism 102, the first slider 22, the first slide rail 23, and other structures within the corner area of ​​the L-shaped first support 50, further improving the compactness and miniaturization of the overall structure.

[0055] In some embodiments of the present invention, a second support 60 is further included, the first support 50 is slidably connected to the second support 60 and driven by the first drive mechanism 101 fixed to the second support 60. In order to realize the sliding connection of the first support 50 on the second support 60, a slider and slide rail structure can be provided; a fourth drive mechanism 104 is also included, the output end of the fourth drive mechanism 104 is connected to the second support 60, and the fourth drive mechanism 104 drives the second support 60 to move laterally, so as to move the bearing fixture 20 closer to or away from the feeding plate 10. After the material is received on the feed plate 10 on the support fixture 20, the fourth drive mechanism 104 actuates, causing the material on the support fixture 20 to move away from the feed plate 10. This serves two purposes: first, for NR inductors, silver paste needs to be printed on two sides of the inductor (the side closest to the feed plate 10 and the opposite side). Moving the material laterally away from the feed plate 10 prevents the feed plate 10 from obstructing the printing head as it descends, allowing the printing head to print silver paste on the side; second, it prevents the silver paste on the printing head from sticking to the feed plate 10. If the silver paste solidifies on the feed plate 10, it will become a hard lump, affecting the normal sliding of the material on the feed plate 10. It is understandable that setting the lateral depth of the groove 31 on the stop fixture 30 to be deeper would also allow the material falling onto the support fixture 20 to be appropriately further away from the feed plate 10, but this would increase the material's travel and slightly reduce the efficiency of the pad printing machine.

[0056] In some embodiments of the present invention, the first support 50 and the second support 60 are spaced apart to accommodate the second slider 51 and the second slide rail 52. The first support 50 is slidably connected to the second support 60 through the second slider 51 and the second slide rail 52, thereby driving the support fixture 20 to move up and down. The first drive mechanism 101 is at least partially disposed in the space. That is, the space where the second slider 51 and the second slide rail 52 are located is used to install the first drive mechanism 101, avoiding the first drive mechanism 101 occupying other space, thereby improving the compactness and miniaturization of the pad printing machine.

[0057] See details Figure 21As shown, in some embodiments of the present invention, a third support 70 is also included, on which two second supports 60 are provided. Each second support 60 is provided with a first support 50, a bearing fixture 20, and a material blocking fixture 30. The third support 70 is driven by a fifth drive mechanism 105, which drives the third support 70 to move longitudinally, specifically by sliding longitudinally on a third slide rail 71, so that the bearing fixtures 20 on the two second supports 60 alternately approach the feeding plate 10 to receive materials. Two sets of carrier fixtures are set up so that when the first set of carrier fixtures receives material from the feeding plate, the other set of carrier fixtures is at the unloading station to unload the material with printed silver paste. After unloading, the first set of carrier fixtures has completed receiving material and printing silver paste. The fifth drive mechanism 105 is activated to bring the first set of carrier fixtures to the unloading station for unloading, while the other set of carrier fixtures moves to the receiving station to receive material from the feeding plate 10. This process is repeated, so that unloading and receiving are carried out simultaneously, which improves the working efficiency of the pad printing machine.

[0058] In some embodiments of the present invention, the feeding plate 10 is horizontally arranged, and the feeding plate 10 is driven by a vibrator to form a vibratory plate, that is, the vibration of the feeding plate 10 is used to transport the material on the feeding plate 10, so that the material moves forward in the feeding trough. The vibrator is a known technology in the art and will not be described in detail here. To improve efficiency, the feeding plate 10 has multiple feeding slots, allowing multiple inductors to be fed onto the support fixture 20 at once. Therefore, the feeding plate 10 has a large longitudinal dimension, forming a large plate. When using a vibrator structure, if the vibrator's power is too low, the material will have difficulty moving forward on the feeding plate 10 or will move slowly. If the vibrator's power is too high, the material may jump on the feeding plate 10, potentially causing stacking between adjacent inductors and affecting normal feeding. Therefore, in other embodiments of the invention, the feeding plate 10 includes an inclined feeding plate 12 and an arc-shaped feeding plate 13 connected to the inclined feeding plate 12. The inductors enter the feeding slot 11 from the high end of the inclined feeding plate 12, slide freely under gravity, and then move horizontally via the arc-shaped feeding plate 13 before sliding onto the negative pressure suction head 21 of the support fixture 20. This simplifies the feeding structure, prevents material jumping or slow movement, eliminates the need for a vibrator, and reduces costs.

[0059] In some embodiments of the present invention, the pressing end of the pressure plate 41 is provided with an elastic component. The elastic component is provided to avoid the pressure plate 41 making hard contact with the side of the workpiece and scratching it. In some specific embodiments, the elastic component is a spring and a pressure plate (not shown) provided at the end of the spring, and there are multiple sets of springs and pressure plates. In other specific embodiments, the elastic component is an adhesive strip 42, which is provided in a slot 43 provided on the pressure plate 41, or the adhesive strip 42 is bonded to the pressure plate 41. This embodiment cleverly uses a long strip of adhesive strip to replace the spring and pressure plate, which can ensure that the multiple inductors on the bearing fixture 20 remain neat after the adhesive strip is pressed, and will not scratch the surface of the inductor. At the same time, compared with springs and pressure plates, the structure is greatly simplified and the cost is lower.

[0060] In some embodiments of the present invention, the first drive mechanism 101 to the fifth drive mechanism 105 are cylinders, or lead screw mechanisms, or a combination of cylinders and lead screw mechanisms.

[0061] The working process of the pad printing machine in this embodiment of the invention is as follows: When the support fixture 20 moves to the position of the feeding plate 10, the negative pressure suction head 21 of the support fixture 20 is flush with the bottom wall of the feeding groove 11, and the groove wall of the U-shaped groove 31 on the blocking fixture 30 is higher than the upper surface of the negative pressure suction head 21. The inductor 80 in the feeding groove 11 slides into the negative pressure suction head 21 and is blocked by the groove wall of the U-shaped groove 31 and stays on the negative pressure suction head 21. The air passage in the negative pressure suction head 21 generates negative pressure, which adsorbs and fixes the inductor 80 on the negative pressure suction head 21. The first driving mechanism 101, the second driving mechanism 102, and the fourth driving mechanism 104 are activated. The first driving mechanism 101 drives the support fixture 20 to descend, so that the inductor 80 on the support fixture 20 reaches the position of the pressure plate 41 (specifically, the side of the inductor can extend out of the pressure plate 41). When the material is pressed by the adhesive strip 42, the second drive mechanism 102 drives the stop fixture 30 to descend, so that the upper surface of the inductor 80 on the carrier fixture 20 is higher than the stop fixture 30 and exposed (the purpose of the exposure is to allow the pad printing head to contact the inductor surface when descending, so as to avoid the stop fixture 30 blocking the pad printing head); the fourth drive mechanism 104 drives the inductor on the carrier fixture 20 to move laterally away from the feed plate 10, and then the third drive mechanism 103 acts, so that the adhesive strip 42 abuts against the side wall of the inductor 80 on the carrier fixture 20. Due to the action of the groove wall of the U-shaped groove 31 and the adhesive strip 42, the multiple inductors 80 on the carrier fixture 20 are neatly arranged in a straight line. The third drive mechanism 103 returns to its original position, and the pad printing head with silver paste moves to directly above the inductor 80 and descends, so that the silver paste on the pad printing head is printed on the surface of the inductor. After printing is completed, the pad printing head moves to the silver paste tank to pick up the silver paste, while the fifth drive mechanism 105 is activated, so that the inductor 80 printed with silver paste is transferred to the unloading process. At this time, another set of supporting fixtures 20 moves synchronously to the feeding plate 10 position under the drive of the fifth drive mechanism 105 to receive the inductor 80 in the feeding tank 11. This process is repeated to realize the continuous operation of receiving inductors, inductor descent, pressing, silver paste printing, and unloading.

[0062] By setting a retaining fixture 30 at the position of the supporting fixture 20, the supporting fixture 20 and the retaining fixture 30 can be raised and lowered. The retaining fixture 30 has a U-shaped groove 31, and the negative pressure suction head 21 on the supporting fixture 20 is set in the U-shaped groove 31. When receiving material from the feeding plate 10, the retaining fixture 30 can be raised until the groove wall of the U-shaped groove 31 is higher than the negative pressure suction head 21. The groove wall of the U-shaped groove 31 blocks the material, so that the material is positioned on the supporting fixture 20. After receiving the material, the supporting fixture 20 drives the material to descend to the pressure plate position. At the same time, the retaining fixture 30 descends until the upper surface of the material is exposed above the retaining fixture 30. The pressure plate 41 moves to apply force to the side of the material, so that the supporting fixture 20... The materials on the support fixture 20 are neatly arranged, enabling silver paste printing to be completed directly on the support fixture. This eliminates the need for the existing method of using a negative pressure adsorption mechanism to pick up the materials from the support fixture and then transfer them, thus avoiding problems such as incomplete material gripping or material deflection during the adsorption, picking, and transfer process. It also avoids issues such as the inability of the fork to insert or tooth knocking as seen in existing pad printing machines. In this embodiment of the invention, because the center distance between adjacent materials on the support fixture 20 remains consistent and the position is accurate, precise printing is achieved, and the working efficiency of the pad printing machine is improved. Compared with existing pad printing machines, the pad printing machine described in this embodiment of the invention has a simpler structure and reduces the manufacturing cost of the pad printing machine.

[0063] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A pad printing machine, characterized in that: include A feeding plate, wherein the feeding plate is provided with a plurality of feeding slots; The support fixture is located at the discharge end of the feeding plate and is used to receive the material conveyed by the feeding trough of the feeding plate. The support fixture has several negative pressure suction heads and is driven by a first driving mechanism, which drives the support fixture to move up and down. A material blocking fixture has several U-shaped grooves. The negative pressure adsorption head is disposed in the U-shaped grooves. The groove wall of the U-shaped groove is used to block the material on the carrying fixture, so that the material conveyed to the carrying fixture by the feeding groove can be positioned. The material blocking fixture is driven by a second driving mechanism, which drives the material blocking fixture to move up and down relative to the carrying fixture. The pressing mechanism is located below the feeding plate and includes a pressing plate and a third driving mechanism. The third driving mechanism drives the pressing plate to extend and retract laterally, so that the pressing plate moves closer to or away from the bearing fixture. The pressing plate that is close to the bearing fixture can push the side of the material, so that the material on the bearing fixture is neatly arranged. The upper end face of the U-shaped groove is recessed to form a platform; The pressing end of the pressing plate is provided with an elastic component.

2. The pad printing machine according to claim 1, characterized in that: The bearing fixture is mounted on the first support, and the second drive mechanism is fixedly connected to the first support. The first support is provided with a clearance groove and also includes a connecting plate. The connecting plate is located in the clearance groove. One end of the connecting plate is fixedly connected to the material blocking fixture, and the other end is fixedly connected to the output end of the second drive mechanism. The second drive mechanism drives the material blocking fixture to move up and down through the connecting plate.

3. A pad printing machine according to claim 2, characterized in that: The second drive mechanism is disposed on the side of the first support near the feeding plate. A first slider and a first slide rail are disposed on the side of the second drive mechanism on the first support. The output end of the second drive mechanism is fixed to the connecting plate through the first slider. The first slider is fixed to the connecting plate.

4. A pad printing machine according to claim 3, characterized in that: It also includes a second support, the first support being slidably connected to the second support and driven by the first drive mechanism fixed to the second support; it also includes a fourth drive mechanism, the output end of which is connected to the second support, and the fourth drive mechanism drives the second support to move laterally so as to move the bearing fixture closer to or away from the feeding plate.

5. A pad printing machine according to claim 4, characterized in that: The first support and the second support are spaced apart to accommodate the second slider and the second slide rail. The first support is slidably connected to the second support through the second slider and the second slide rail. The first drive mechanism is at least partially disposed in the space.

6. A pad printing machine according to claim 5, characterized in that: It also includes a third support, on which two second supports are provided. Each second support is provided with a first support, a bearing fixture, and a material blocking fixture. The third support is driven by a fifth drive mechanism, which drives the third support to move longitudinally, so that the bearing fixtures on the two second supports alternately approach the feeding plate to receive material.

7. A pad printing machine according to claim 1, characterized in that: The feeding plate includes an inclined feeding plate and an arc-shaped feeding plate connected to the inclined feeding plate; or the feeding plate is horizontally arranged and the feeding plate is driven by a vibrator to form a vibrating plate.

8. A pad printing machine according to claim 1, characterized in that: The elastic component is an adhesive strip, which is disposed in a slot provided on the pressure plate, or the adhesive strip is bonded and fixed on the pressure plate; Alternatively, the elastic component may be a spring and a pressure plate disposed at the end of the spring.

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