Plastic part pad printing mechanism

Abstract

The utility model discloses a kind of plastic part pad printing mechanism, including glue head subassembly, steel sheet subassembly, ink scraping and sending subassembly and workstation;Steel sheet subassembly includes concave plate, and the texture to be printed is etched in concave plate;Ink scraping and sending subassembly includes ink roller and doctor blade, and ink roller is used to brush ink on concave plate;Doctor blade is used to scrape away the ink of excess on concave plate;Glue head subassembly includes silica gel head, and silica gel head is used to dip the ink on concave plate, and ink is transferred to workpiece surface;Workstation includes positioning mechanism, tight top mechanism, mounting plate and limit piece;Positioning mechanism is fixed with mounting plate, and the spatial position of mounting plate can be adjusted;Tight top mechanism is threadedly connected with mounting plate, limit piece is fixedly connected with mounting plate, and rotating tight top mechanism can realize workpiece fixed installation by limit piece.The utility model technical scheme aims at realizing the fixation of workpiece, and improving the stability of printing quality.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment for plastic parts, and in particular to a pad printing mechanism for plastic parts. Background Technology

[0002] Pad printing machines for plastic parts are widely used for printing graphics on the surface of plastic products. They typically feature a flexible silicone head that picks up an ink pattern etched onto a flat steel plate and then precisely presses it onto the surface of plastic workpieces of various shapes. This technology is particularly suitable for surface decoration of irregular plastic parts with curved or uneven surfaces.

[0003] In existing technologies, the worktables of the aforementioned pad printing mechanisms often employ fixed bases designed for specific workpiece shapes. These bases typically lack adjustability and are usually dedicated to a specific purpose. Furthermore, under the impact force of the silicone head pressing down, such fixed bases can easily cause slight displacement or vibration of the workpiece, resulting in quality defects such as blurred or ghosting printed patterns. Utility Model Content

[0004] The purpose of this invention is to provide a pad printing mechanism for plastic parts, which aims to fix the workpiece and improve the stability of printing quality.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A pad printing mechanism for plastic parts includes a pad assembly, a steel plate assembly, an ink feeding assembly, and a worktable;

[0007] The steel plate assembly includes a concave plate with a texture to be printed etched on it; the ink feeding assembly includes an ink roller and a scraper, the ink roller being used to roll ink onto the concave plate; the scraper being used to scrape away excess ink from the concave plate; the ink head assembly includes a silicone head, the silicone head being used to pick up the ink from the concave plate and transfer the ink to the surface of the workpiece.

[0008] The worktable includes a positioning mechanism, a clamping mechanism, a mounting plate, and a limiting component;

[0009] The positioning mechanism is fixed to the mounting plate and can adjust the spatial position of the mounting plate; the clamping mechanism is threadedly engaged with the mounting plate, the limiting member is fixedly connected to the mounting plate, and rotating the clamping mechanism can achieve fixed installation of the workpiece through the limiting member.

[0010] In one embodiment, the clamping mechanism further includes a servo motor, a threaded seat, a screw, and a clamping member;

[0011] The servo motor and the threaded seat are fixed to the mounting plate. The screw passes through the threaded seat and is threadedly engaged with the threaded seat. One end of the screw is connected to the servo motor, and the other end is connected to the clamping member.

[0012] In one embodiment, the clamping mechanism further includes a guide member, the clamping member being slidably engaged with the guide member; the screw is connected to the clamping member via a bearing.

[0013] In one embodiment, the clamping mechanism further includes a contour pad having a shaped surface that conforms to the workpiece, and the contour pad is connected to the clamping member by screws.

[0014] In one embodiment, the limiting member includes a first limiting part, a second limiting part, and a mounting part; the mounting part is connected to the mounting plate by screws.

[0015] The first limiting part and the second limiting part are set at an angle, and the first limiting part and the second limiting part are axially symmetrical with respect to the mounting part; the first limiting part, the second limiting part and the clamping mechanism are used together to fix the workpiece.

[0016] In one embodiment, the first limiting part and the second limiting part are respectively formed with a first limiting hole and a second limiting hole; the mounting plate is respectively formed with a first mating groove corresponding to the first limiting hole and a second mating groove corresponding to the second limiting hole;

[0017] The mounting part has a mounting groove, and the mounting plate has a threaded hole corresponding to the mounting groove;

[0018] The cross-sections of the first mating groove, the second mating groove, and the mounting through groove are all racetrack-shaped with the same extension direction.

[0019] In one embodiment, anti-slip pads are provided on the inner sides of both the first limiting portion and the second limiting portion, and the anti-slip pads are used to contact the workpiece.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This utility model effectively solves the technical problems of the fixed base being dedicated to a single purpose, lacking adjustability, and prone to workpiece displacement in the prior art by setting up a worktable. Specifically, the positioning mechanism of this technical solution adjusts the spatial position of the mounting plate, achieving precise alignment of the worktable relative to the silicone head. Furthermore, by rotating the clamping mechanism, it works in conjunction with the fixed limiting component to stably clamp the workpiece from different sides, breaking the limitation that the fixed base can only be used for a single purpose, forming a reliable fixing force, thereby eliminating the slight displacement or vibration of the workpiece when the silicone head is pressed down, fundamentally avoiding the quality defects such as blurry printing patterns and ghosting mentioned in the prior art, and improving the stability of printing quality. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the plastic part pad printing mechanism of this utility model;

[0025] Figure 2 for Figure 1 Enlarged view of part A in the image;

[0026] Figure 3 for Figure 1 A structural diagram from another angle;

[0027] Figure 4 for Figure 3 Enlarged view of part B in the image;

[0028] Illustrations: 100, Plastic part pad printing mechanism; 110, ink head assembly; 111, silicone head; 120, steel plate assembly; 121, concave plate; 130, ink feeding assembly; 131, ink roller; 132, doctor blade; 140, worktable; 141, positioning mechanism; 142, clamping mechanism; 1421, servo motor; 1422, threaded seat; 1423, screw; 1424, clamping component; 1425, guide component; 1426, contour pad; 143, mounting plate; 145, limiting component; 1451, first limiting part; 1452, second limiting part; 1453, mounting part; 145a, first limiting hole; 145b, second limiting hole; 145c, mounting through groove; 146, anti-slip pad; 20, workpiece. Detailed Implementation

[0029] To make the technical objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] This utility model embodiment provides a plastic part pad printing mechanism 100.

[0033] Please see Figures 1 to 4 The plastic part pad printing mechanism 100 includes a glue head assembly 110, a steel plate assembly 120, an ink feeding assembly 130, and a worktable 140.

[0034] The steel plate assembly 120 includes a concave plate 121, which is etched with a texture to be printed; the ink feeding assembly 130 includes an ink roller 131 and a doctor blade 132, the ink roller 131 being used to roll ink onto the concave plate 121; the doctor blade 132 being used to scrape away excess ink from the concave plate 121; the ink head assembly 110 includes a silicone head 111, which is used to pick up the ink on the concave plate 121 and transfer the ink to the surface of the workpiece 20.

[0035] The workbench 140 includes a positioning mechanism 141, a clamping mechanism 142, a mounting plate 143, and a limiting component 145;

[0036] The positioning mechanism 141 is fixed to the mounting plate 143 and can adjust the spatial position of the mounting plate 143; the clamping mechanism 142 is threadedly engaged with the mounting plate 143, and the limiting member 145 is fixedly connected to the mounting plate 143. Rotating the clamping mechanism 142 can achieve fixed installation of the workpiece 20 through the limiting member 145.

[0037] It is understood that the technical solution of this embodiment effectively solves the technical problems of the fixed base being dedicated to a single purpose, unable to be adjusted, and the workpiece 20 being prone to displacement in the background art by setting up the worktable 140. Specifically, the positioning mechanism 141 of this technical solution adjusts the spatial position of the mounting plate 143, realizing the precise alignment of the worktable 140 relative to the silicone head 111; furthermore, by rotating the clamping mechanism 142, it works in conjunction with the fixed limiting member 145 to stably clamp the workpiece 20 from different sides, breaking the limitation that the fixed base can only be dedicated to a single purpose, forming a reliable fixing force, thereby eliminating the slight displacement or vibration of the workpiece 20 when the silicone head 111 is pressed down, fundamentally avoiding the quality defects such as blurry printing patterns and ghosting mentioned in the background art, and improving the stability of printing quality.

[0038] Specifically, the worktable 140 is used to position and fix the workpiece 20 to be printed. The positioning mechanism 141 is used to adjust the overall position of the worktable 140. Its specific implementation may include: one or more linear slides, such as a two-dimensional or three-dimensional linear slide using guide rails and sliders, which is adjusted by a locking handle. Its main function is to move the entire mounting plate 143 and its components in space to adjust their position, ensuring that the workpiece 20 is accurately aligned with the silicone head 111 above.

[0039] Specifically, the mounting plate 143 can be an aluminum plate, a steel plate, or a high-strength engineering plastic plate. It is usually machined with threaded holes, T-slots, or smooth holes for fixing the positioning mechanism 141, the clamping mechanism 142, and the limiting member 145.

[0040] Specifically, the clamping mechanism 142 can be achieved by manually rotating a screw 1423 with a handle, or by driving a motor to rotate a screw 1423. By driving the screw 1423 to rotate, it converts rotational motion into linear motion, thereby pushing or clamping the workpiece 20. The limiting member 145 is used to position and block the workpiece 20 from the other side or other directions. It can be a stop block or a contour block that can be customized according to the shape of the workpiece 20. It can be connected to the mounting plate 143 by bolts, pins, or welding.

[0041] In a specific embodiment, the clamping mechanism 142 further includes a servo motor 1421, a threaded seat 1422, a screw 1423, and a clamping member 1424;

[0042] The servo motor 1421 and the threaded seat 1422 are fixed to the mounting plate 143. The screw 1423 passes through the threaded seat 1422 and is threadedly engaged with the threaded seat 1422. One end of the screw 1423 is connected to the servo motor 1421, and the other end is connected to the clamping member 1424.

[0043] Understandably, the servo motor 1421 drives the screw 1423 to advance the clamping member 1424, realizing the automated control of workpiece 20 clamping and improving clamping efficiency, stability and consistency.

[0044] Furthermore, the clamping mechanism 142 also includes a guide member 1425, and the clamping member 1424 is slidably engaged with the guide member 1425; the screw 1423 is connected to the clamping member 1424 via a bearing. It can be understood that by adding the guide member 1425 and the bearing, the precision and stability of the linear movement of the clamping member 1424 are ensured, effectively eliminating lateral swaying and rotational friction, making the clamping action smoother and more stable.

[0045] Furthermore, the clamping mechanism 142 also includes a contour pad 1426, which has a shaped surface that conforms to the workpiece 20. The contour pad 1426 is connected to the clamping member 1424 by screws. Specifically, in this embodiment, the shaped surface of the contour pad 1426 fully conforms to the curved surface of the workpiece 20, increasing the contact area and making the clamping force evenly distributed. This effectively prevents the workpiece 20 from being crushed and deformed, and also improves the clamping stability.

[0046] Please continue reading. Figures 1 to 4 In a specific embodiment of this utility model, the limiting member 145 includes a first limiting part 1451, a second limiting part 1452, and a mounting part 1453; the mounting part 1453 is connected to the mounting plate 143 by screws.

[0047] The first limiting part 1451 and the second limiting part 1452 are set at an angle, and the first limiting part 1451 and the second limiting part 1452 are symmetrical about the mounting part 1453. The first limiting part 1451, the second limiting part 1452 and the clamping mechanism 142 are used together to fix the workpiece 20.

[0048] Specifically, the mounting part 1453 can be locked by engaging with pre-drilled threaded holes or nuts on the mounting plate 143. Further, the first limiting part 1451, the second limiting part 1452, and the clamping mechanism 142 jointly restrict the workpiece 20's freedom of movement in multiple directions. Then, the clamping mechanism 142 applies a pushing force from a direction approximately opposite to the two limiting parts, pressing the workpiece 20 tightly against the first limiting part 1451 and the second limiting part 1452, thereby achieving reliable positioning and clamping simultaneously in three directions, forming a stable triangular clamping area. This improves the positioning accuracy and clamping reliability of the complex-shaped workpiece 20, ensuring the stability of the transfer quality.

[0049] Furthermore, the first limiting part 1451 and the second limiting part 1452 are respectively formed with a first limiting hole 145a and a second limiting hole 145b; the mounting plate 143 is respectively formed with a first mating groove corresponding to the first limiting hole 145a and a second mating groove corresponding to the second limiting hole 145b.

[0050] The mounting portion 1453 has a mounting groove 145c, and the mounting plate 143 has a threaded hole corresponding to the mounting groove 145c.

[0051] The cross-sections of the first mating groove, the second mating groove, and the mounting through groove 145c are all racetrack-shaped with the same extension direction.

[0052] Understandably, the cross-sections of the first mating groove, the second mating groove, and the mounting through groove 145c are all racetrack-shaped with the same extension direction, meaning that the major axes of these three grooves are parallel to each other. This allows the entire limiting member 145 to be translated and adjusted along a fixed direction on the mounting plate 143, such as the X-axis or Y-axis. Therefore, this arrangement ensures the accuracy of the positioning reference while simplifying the one-way adjustment of the positioning mechanism 141, thus reducing equipment costs.

[0053] Preferably, anti-slip pads 146 are provided on the inner sides of both the first limiting part 1451 and the second limiting part 1452, and the anti-slip pads 146 are used to contact the workpiece 20.

[0054] It is understandable that by setting the anti-slip pad 146 on the inner side of the limiting part, the friction force in contact with the workpiece 20 is increased, which effectively prevents the workpiece 20 from slipping during the printing process and ensures the accuracy and stability of the printing position.

[0055] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pad printing mechanism for plastic parts, characterized in that, Includes the glue head assembly, steel plate assembly, ink scraper assembly, and worktable; The steel plate assembly includes a concave plate with a texture to be printed etched on it; the ink feeding assembly includes an ink roller and a scraper, the ink roller being used to roll ink onto the concave plate; the scraper being used to scrape away excess ink from the concave plate; the ink head assembly includes a silicone head, the silicone head being used to pick up the ink from the concave plate and transfer the ink to the surface of the workpiece. The worktable includes a positioning mechanism, a clamping mechanism, a mounting plate, and a limiting component; The positioning mechanism is fixed to the mounting plate and can adjust the spatial position of the mounting plate; the clamping mechanism is threadedly engaged with the mounting plate, the limiting member is fixedly connected to the mounting plate, and rotating the clamping mechanism can achieve fixed installation of the workpiece through the limiting member.

2. The plastic part pad printing mechanism as described in claim 1, characterized in that, The clamping mechanism also includes a servo motor, a threaded seat, a screw, and a clamping component; The servo motor and the threaded seat are fixed to the mounting plate. The screw passes through the threaded seat and is threadedly engaged with the threaded seat. One end of the screw is connected to the servo motor, and the other end is connected to the clamping member.

3. The plastic part pad printing mechanism as described in claim 2, characterized in that, The clamping mechanism further includes a guide member, which is slidably engaged with the guide member; the screw is connected to the clamping member via a bearing.

4. The plastic part pad printing mechanism as described in claim 3, characterized in that, The clamping mechanism also includes a contour pad, which has a shaped surface that fits against the workpiece, and the contour pad is connected to the clamping member by screws.

5. The plastic part pad printing mechanism as described in any one of claims 1 to 4, characterized in that, The limiting component includes a first limiting part, a second limiting part, and a mounting part; the mounting part is connected to the mounting plate by screws. The first limiting part and the second limiting part are set at an angle, and the first limiting part and the second limiting part are axially symmetrical with respect to the mounting part; the first limiting part, the second limiting part and the clamping mechanism are used together to fix the workpiece.

6. The plastic part pad printing mechanism as described in claim 5, characterized in that, The first limiting part and the second limiting part are respectively formed with a first limiting hole and a second limiting hole; the mounting plate is respectively formed with a first mating groove corresponding to the first limiting hole and a second mating groove corresponding to the second limiting hole; The mounting part has a mounting groove, and the mounting plate has a threaded hole corresponding to the mounting groove; The cross-sections of the first mating groove, the second mating groove, and the mounting through groove are all racetrack-shaped with the same extension direction.

7. The plastic part pad printing mechanism as described in claim 5, characterized in that, Both the first limiting part and the second limiting part are provided with anti-slip pads on their inner sides, and the anti-slip pads are used to contact the workpiece.

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