A toy continuous automatic pad printing system and pad printing method

Abstract

The application discloses a kind of toy continuous automatic pad printing system and pad printing method, including continuous conveying mechanism, pad printing machine head, positioning clamping device, control cabinet and support adjusting structure;Horizontal conveyor of continuous conveying mechanism is equipped with multiple sets of positioning jig;Pad printing machine head includes portal frame and vertical lifting pad printing station, integrated silicone pad printing rubber head, plate oil pan and ink scraping assembly;Positioning clamping device is positioned at the two sides of pad printing station;Control cabinet integrates printing timing and conveying linkage control.The method is by horizontal conveyor continuous conveying workpiece, photoelectric sensor triggers positioning clamping, vertical lifting pad printing station automatically completes dip ink, ink scraping and pad printing, realizes continuous automatic pad printing.The application guarantees printing precision by positioning jig and positioning clamping device double positioning, realizes continuous assembly line operation by printing timing and conveying linkage, with the advantages of high degree of automation, high printing precision, high production efficiency, convenient change type and the like.

Description

Technical Field

[0001] This invention belongs to the technical field of toy printing and processing equipment, specifically relating to a continuous automatic pad printing system and pad printing method for toys. Background Technology

[0002] In the toy manufacturing industry, surface printing is a crucial process that determines the appearance quality of toy products. Whether it's the paint job on toy car bodies, the facial designs of cartoon characters, or the alphanumeric markings on educational toys, all require printing. Pad printing, as an indirect printing technology, uses a silicone pad to transfer the design from a printing plate to the workpiece surface. It can adapt to printing needs on flat, curved, and irregular surfaces and is widely used in the toy industry.

[0003] Operators place toy parts one by one onto the fixtures of the pad printing machine, start the machine to complete one printing cycle, and then manually remove the part before placing the next. This method has the following problems: First, it is extremely inefficient, as each part requires manual clamping and handling, making it difficult to meet the needs of mass production; second, the printing position is inconsistent, as the positioning accuracy of manual placement is limited, resulting in deviations in the printing position between different parts; and third, it is labor-intensive, as operators are prone to fatigue from prolonged repetitive work, affecting production efficiency and quality stability.

[0004] Some companies use rotary pad printing equipment. Operators place the workpiece at one station on the turntable, which then rotates to deliver the workpiece to the pad printing station for printing. The turntable then rotates back to the unloading station where the operator retrieves the workpiece. While this method achieves a certain degree of semi-automation, it has the following drawbacks: First, manual placement and retrieval of each workpiece are still required, failing to completely eliminate reliance on manual labor. Second, the number of turntable stations is limited, making continuous assembly line operation impossible. Third, the timing of the turntable rotation and pad printing actions is fixed, making it difficult to flexibly adjust the production cycle.

[0005] In existing pad printing equipment, the workpiece conveying and pad printing actions are mostly controlled independently, lacking linkage and coordination. There are time gaps between the workpiece arrival detection, positioning and clamping, pad printing action, and workpiece delivery stages, affecting overall production efficiency. Furthermore, the lack of linkage adjustment capability between conveying speed and pad printing speed makes it difficult to adapt to the production cycle requirements of different products. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the present invention aims to solve the technical problems of low automation, insufficient positioning accuracy, low production efficiency and lack of linkage between conveying and pad printing in the existing toy pad printing processing method, and provides a continuous automatic pad printing system and pad printing method for toys.

[0007] The technical solution adopted by this invention to solve its technical problem is: A continuous automatic pad printing system for toys, comprising: A continuous conveying mechanism includes a frame and a horizontal conveyor belt mounted on the frame. The horizontal conveyor belt is equipped with multiple sets of toy workpiece positioning fixtures for carrying toy workpieces and realizing continuous feeding in an assembly line. The pad printing head is located in the middle section of the continuous conveying mechanism, including a gantry frame and a vertical lifting pad printing station set on the gantry frame. The vertical lifting pad printing station integrates a silicone pad printing head, a printing plate ink tray and a doctor blade assembly. A positioning and clamping device is provided on both sides of the pad printing head, and is used to position and clamp the toy workpiece during pad printing; The control cabinet, located at the end of the frame, integrates a printing timing control module and a conveyor linkage control module; A support and adjustment structure is provided at the bottom of the frame, including multiple adjustable feet for adjusting the levelness of the equipment.

[0008] Preferably, the horizontal conveyor belt is a circular conveyor belt, and the multiple sets of toy workpiece positioning fixtures are distributed at equal intervals along the length of the horizontal conveyor belt.

[0009] Preferably, the gantry spans above the horizontal conveyor belt, and the vertical lifting and printing station is located on the top crossbeam of the gantry and can be lifted and lowered in the vertical direction.

[0010] Preferably, the vertical lifting pad printing station includes a lifting drive and a lifting slide. The lifting drive drives the lifting slide to move up and down in the vertical direction, and the silicone pad printing head is installed at the bottom of the lifting slide.

[0011] Preferably, the pad printing head further includes a lateral movement component, which is disposed on the top crossbeam of the gantry frame and is used to drive the vertical lifting pad printing station to move in the horizontal direction.

[0012] Preferably, the positioning and clamping device includes positioning cylinders and clamping blocks symmetrically arranged on both sides of the horizontal conveyor belt. The positioning cylinders drive the clamping blocks to move towards the center and clamp the toy workpiece from both sides.

[0013] Preferably, the control cabinet is equipped with a human-machine interface for displaying equipment operating status, printing parameters and fault information, and receiving user operation commands.

[0014] Preferably, the continuous conveying mechanism further includes a conveying drive motor, which is connected to the horizontal conveyor belt for driving the horizontal conveyor belt to operate intermittently or continuously.

[0015] Preferably, the pad printing head also includes a photoelectric sensor, which is located on the front side of the gantry and is used to detect whether the toy workpiece has reached the pad printing station and trigger the pad printing action.

[0016] Another technical problem to be solved by the present invention is to provide a continuous automatic pad printing method for toys, comprising the following steps: Step S1: Place the toy workpiece on the positioning fixture of the horizontal conveyor belt, and the horizontal conveyor belt continuously transports the toy workpiece to the pad printing station. Step S2: When the toy workpiece arrives at the pad printing station, the positioning and clamping device clamps the toy workpiece from both sides and fixes it in the pad printing position; Step S3: The vertical lifting and lowering station of the pad printing head descends, and the silicone pad printing head dips into the ink from the printing plate ink tray and continues to descend, transferring the ink pattern to the surface of the toy workpiece; Step S4: After pad printing is completed, the silicone pad printing head rises and resets, and the positioning clamping device releases the toy workpiece; Step S5: The horizontal conveyor belt sends the toy workpiece that has been pad-printed out of the pad-printing station and transports the next toy workpiece to be pad-printed to the pad-printing station. Steps S2 to S4 are repeated to achieve continuous automatic pad-printing.

[0017] The beneficial effects of this invention are as follows: A horizontal conveyor belt carrying multiple sets of toy workpiece positioning fixtures enables continuous conveying and assembly line operation of toy workpieces. Operators only need to place the workpieces at the inlet; the conveyor belt automatically transports the workpieces sequentially to the pad printing station for printing, and the finished products are then discharged from the outlet. Compared to single-machine manual pad printing, production efficiency can be increased several times, meeting the needs of large-scale production. Multiple sets of toy workpiece positioning fixtures are set on the horizontal conveyor belt to achieve initial positioning of the workpieces on the conveyor belt; simultaneously, positioning clamping devices are installed on both sides of the pad printing station to clamp the workpieces from both sides before pad printing, eliminating positional deviations during the conveying process. This dual positioning mechanism ensures that the printing position of each workpiece is highly consistent, and the printing accuracy and product quality stability are significantly better than manual placement methods.

[0018] By integrating a printing sequence control module and a conveyor linkage control module into the control cabinet, automatic sequence control of conveying, positioning, pad printing, and release is achieved. The intermittent or continuous operation of the horizontal conveyor belt is precisely linked with the lifting and lowering movements of the pad printing head. Upon arrival of the workpiece at the pad printing station, positioning, pad printing, and delivery actions are automatically triggered, ensuring tight coordination between processes and eliminating time gaps caused by manual operation in traditional methods. A photoelectric sensor is installed on the front of the gantry; when a toy workpiece is detected arriving at the pad printing station, the pad printing action is automatically triggered without manual intervention. The silicone pad printing head automatically completes the ink application, ink scraping, and pad printing actions, achieving full automation from workpiece conveying to pad printing completion, significantly reducing labor costs and operational labor intensity. A vertical lifting pad printing station is installed on the gantry, integrating the silicone pad printing head, printing plate ink tray, and ink scraping assembly into one unit. Ink application, ink scraping, and pad printing are completed in the same station, resulting in a compact structure and small footprint. The short vertical lifting motion and fast movement help shorten the pad printing cycle of a single workpiece and improve production efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the toy continuous automatic pad printing system of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0021] Example like Figure 1 As shown, a toy continuous automatic pad printing system includes a continuous conveying mechanism 10, a pad printing head 20, a positioning and clamping device 30, a control cabinet 40, and a support and adjustment structure 50.

[0022] The continuous conveying mechanism 10 includes a frame 11 and a horizontal conveyor belt 12 mounted on the frame 11. The frame 11 is a long, rectangular frame structure, welded from aluminum alloy profiles or square steel tubes, extending horizontally and possessing sufficient structural strength and rigidity. The length of the frame 11 is 2000-4000 mm, and the width is 300-600 mm; the specific dimensions are determined based on the specifications of the toy workpiece and the production cycle.

[0023] The horizontal conveyor belt 12 is a circular conveyor belt made of food-grade PVC or PU material, with an anti-slip texture on the surface to prevent toy workpieces from sliding during transportation.

[0024] Multiple sets of toy workpiece positioning fixtures 13 are installed on the horizontal conveyor belt 12, evenly spaced along its length. Each positioning fixture 13 is a contour-following fixture, its shape matching the contour of the bottom of the toy workpiece, used to support and position the toy workpiece at a preset position on the horizontal conveyor belt 12. The positioning fixtures 13 are made of engineering plastic or aluminum alloy, detachably mounted on the horizontal conveyor belt 12, and can be replaced according to the shape and size of different toy workpieces.

[0025] The upper surface of the positioning fixture 13 is provided with a positioning groove or a positioning boss, which cooperates with the positioning structure on the bottom of the toy workpiece to ensure that the workpiece is in a consistent position on the conveyor belt. The center position of the positioning fixture 13 is aligned with the center of the width direction of the horizontal conveyor belt 12 to ensure that the workpiece is located in the central area of ​​the conveyor belt during the conveying process.

[0026] Side plates 14 are provided on both sides of the frame 11, extending along the length of the horizontal conveyor belt 12, to prevent toy workpieces from falling off the sides during transport. The inner surface of the side plates 14 is smooth and will not cause damage when in contact with the workpieces.

[0027] The pad printing head 20 is located in the middle section of the continuous conveying mechanism 10 and is used for automatic pad printing on toy workpieces. The pad printing head 20 includes a gantry frame 21 and a vertical lifting pad printing station 22 disposed on the gantry frame 21.

[0028] The gantry frame 21 spans across the horizontal conveyor belt 12 and is fixedly installed on both sides of the frame 11. The gantry frame 21 has an inverted U-shaped structure, made of aluminum alloy profiles or square steel tubing, and possesses sufficient structural rigidity to support the weight of the vertically lifting pad printing station 22. The top crossbeam 211 of the gantry frame 21 extends along the width of the horizontal conveyor belt 12, and its height is 300-500mm higher than the surface of the horizontal conveyor belt 12, providing sufficient lifting space for the vertically lifting pad printing station 22.

[0029] The vertical lifting pad printing station 22 is installed on the top crossbeam 211 of the gantry 21 and can be lifted and lowered in the vertical direction. The vertical lifting pad printing station 22 includes a lifting drive 221, a lifting slide 222, and a horizontal movement assembly 223.

[0030] The lateral movement assembly 223 is mounted on the top beam 211 of the gantry 21 and includes a horizontal guide rail and a lateral drive component. It drives the vertically lifting pad printing station 22 to move horizontally (i.e., along the length of the beam 211). The lateral drive component is a servo motor or cylinder, connected to the lifting slide 222 via a lead screw or synchronous belt. The lateral movement assembly 223 allows the pad printing head 20 to be adjusted horizontally to accommodate printing needs at different positions on workpieces of different sizes.

[0031] The lifting drive component 221 is mounted on the horizontal movement component 223. It is a servo motor or cylinder and is connected to the lifting slide 222 via a lead screw or synchronous belt to drive the lifting slide 222 to move up and down in the vertical direction.

[0032] The lifting slide 222 is slidably mounted on the vertical guide rail of the gantry frame 21 and is driven to rise and fall by the lifting drive component 221. A silicone pad printing head 23 is installed at the bottom of the lifting slide 222.

[0033] The vertical lifting pad printing station 22 also integrates a printing plate ink tray 24 and a doctor blade assembly. The printing plate ink tray 24 is located on one side or below the lifting slide 222 and is used to hold ink. The printing plate ink tray 24 has a shallow tray structure and contains a printing plate with the pattern to be printed engraved on it. The doctor blade assembly is located on one side of the printing plate ink tray 24 and includes a doctor blade and a doctor blade drive. It is used to scrape off excess ink from the surface of the printing plate before the silicone pad printing head 23 dips in ink, leaving only the ink in the grooves of the pattern.

[0034] The vertical lifting pad printing station 22 has two lifting actions: the first stage is the ink dipping stroke, where the lifting slide 222 descends until the silicone pad printing head 23 contacts the printing plate in the printing plate ink tray 24, dips in ink, and then rises to reset; the second stage is the pad printing stroke, where the lifting slide 222 descends until the silicone pad printing head 23 contacts the surface of the toy workpiece, transfers the ink pattern onto the workpiece, and then rises to reset.

[0035] The pad printing head 20 also includes a photoelectric sensor, which is located on the front side of the gantry 21 (i.e., the upstream side in the material conveying direction), and installed at the front end of the crossbeam 211 or on both sides of the frame 11. The photoelectric sensor is a through-beam photoelectric sensor or a reflective photoelectric sensor, used to detect whether the toy workpiece has reached the pad printing station. When the workpiece passes through the detection area of ​​the photoelectric sensor, the sensor sends a trigger signal to the control cabinet 40 to start the pad printing action.

[0036] The horizontal distance between the photoelectric sensor and the vertical lifting pad printing station 22 is matched with the spacing of the positioning fixture 13 to ensure that when the photoelectric sensor detects the workpiece, the workpiece is exactly below the vertical lifting pad printing station 22.

[0037] The positioning and clamping device 30 is located on both sides of the pad printing head 20, that is, on the frame 11 on both sides of the gantry 21, and is used to position and clamp the toy workpiece during pad printing to ensure the accuracy of the printing position.

[0038] The working process of the positioning and clamping device 30 is as follows: when the toy workpiece arrives at the pad printing station with the horizontal conveyor belt 12, the horizontal conveyor belt 12 stops (intermittent operation mode), and the positioning and clamping device 30 clamps the toy workpiece from both sides to fix the workpiece in the pad printing position; after the pad printing is completed, the positioning and clamping device 30 retracts, the horizontal conveyor belt 12 continues to run, and sends out the pad-printed workpiece.

[0039] The control cabinet 40 is located at the end or side of the frame 11 and integrates a printing timing control module and a conveyor linkage control module. The control cabinet 40 is a closed box structure made of metal sheet, which has good electromagnetic shielding and heat dissipation performance.

[0040] The printing timing control module is a programmable logic controller (PLC) or an embedded controller, electrically connected to the lifting drive 221, the horizontal movement component 223, and the squeegee component of the vertical lifting pad printing station 22. It controls the timing of the actions of each actuator in the pad printing head 20. The printing timing control module contains built-in pad printing process parameters, including ink dipping time, pad printing pressure, pad printing time, and the lifting speed of the silicone pad printing head.

[0041] The conveyor linkage control module is electrically connected to the conveyor drive motor, the positioning and clamping device 30, and the photoelectric sensor. It is used to control the operation of the horizontal conveyor belt 12 and the action of the positioning and clamping device 30, and to receive the trigger signal from the photoelectric sensor to realize the linkage control of conveying and pad printing.

[0042] The control cabinet 40 is equipped with a human-machine interface, which is a touch screen display installed on the front panel of the control cabinet 40. The human-machine interface is used to display the equipment operating status, printing parameters and fault information, and to receive user operation commands, such as parameter setting, mode switching, manual control, etc.

[0043] The control cabinet 40 is also equipped with a power supply module, which is a switching power supply that converts external AC power into DC power required by each module to power each actuator and control module.

[0044] The support and adjustment structure 50 is located at the bottom of the frame 11 and includes multiple adjustable feet 51. There are four adjustable feet 51, which are respectively located at the four corners of the bottom of the frame 11, and are used to support the entire device and adjust the level of the equipment.

[0045] Each adjustable leveling cup 51 includes a screw 511, an adjusting nut threadedly connected to the screw 511, and a base fixed to the bottom end of the screw 511. The upper end of the screw 511 is fixedly connected to the frame 11, and the lower end is fixedly connected to the base. The adjusting nut is fitted onto the screw 511 and threadedly engages with it. Rotating the adjusting nut changes the extension length of the screw 511, thereby adjusting the height of each corner of the frame 11 and achieving levelness adjustment of the equipment.

[0046] The chassis has a circular or square disc-shaped structure with anti-slip pads on the bottom. The anti-slip pads are made of rubber or silicone material to increase friction with the ground and prevent the equipment from sliding during operation.

[0047] The operator places the toy workpieces to be pad-printed one by one onto the positioning fixture 13 at the feed end of the horizontal conveyor belt 12. The positioning groove or positioning boss of the positioning fixture 13 cooperates with the positioning structure on the bottom of the toy workpiece to achieve the initial positioning of the workpiece.

[0048] The conveyor drive motor starts, driving the horizontal conveyor belt 12 to operate intermittently. The horizontal conveyor belt 12 moves the positioning fixture 13, which is loaded with toy workpieces, forward step by step along the conveying direction, realizing continuous feeding of the assembly line.

[0049] The positioning fixture 13, loaded with toy workpieces, moves to the pad printing station along the horizontal conveyor belt 12. When the toy workpiece reaches the detection area of ​​the photoelectric sensor, the photoelectric sensor detects the arrival of the workpiece and sends a trigger signal to the control cabinet 40.

[0050] After receiving the trigger signal, the control cabinet 40 stops the control conveyor drive motor and the horizontal conveyor belt 12 stops operating. At this time, the toy workpiece is exactly below the vertical lifting and pad printing station 22.

[0051] The control cabinet 40 controls the positioning cylinders 31 on both sides to extend simultaneously, driving the clamping blocks 32 to move towards the center, clamping the toy workpiece from both sides and fixing the workpiece in the transfer printing position. The elastic pad 321 buffers the clamping force during clamping, protecting the workpiece surface from damage.

[0052] After the positioning and clamping are completed, the control cabinet 40 starts the vertical lifting and lowering of the pad printing head 20 and the pad printing station 22 to perform the pad printing action.

[0053] The specific transfer printing process is as follows: (1) Ink-dipping stage: The lifting drive 221 drives the lifting slide 222 to descend, and the silicone pad printing head 23 descends to contact the printing plate in the printing plate ink tray 24. The silicone pad printing head 23 briefly stays on the printing plate (ink-dipping time 0.1-0.5 seconds) to pick up the ink in the groove of the printing plate pattern. Then the lifting drive 221 drives the lifting slide 222 to rise and reset.

[0054] (2) Scraping stage: After the ink is dipped, the scraper blade of the scraper assembly moves horizontally on the printing plate surface to scrape off the excess ink on the printing plate surface, leaving only the ink in the pattern groove.

[0055] (3) Pad Printing Stage: The lifting drive 221 drives the lifting slide 222 to descend again, and the silicone pad printing head 23 descends to contact the surface of the toy workpiece. The silicone pad printing head 23 stays on the workpiece surface briefly (pad printing time 0.2-0.8 seconds) to transfer the ink pattern to the surface of the toy workpiece. Then the lifting drive 221 drives the lifting slide 222 to rise and reset, completing one pad printing action.

[0056] (4) After pad printing is completed, the control cabinet 40 controls the positioning cylinders 31 on both sides to retract simultaneously, and the clamping block 32 releases the toy workpiece. The control cabinet 40 controls the conveyor drive motor to restart, and the horizontal conveyor belt 12 continues to run, sending the pad-printed toy workpiece forward out of the pad printing station.

[0057] (5) The horizontal conveyor belt 12 transports the next toy workpiece to be pad printed to the pad printing station, and repeats the above steps S2 to S4 to achieve continuous automatic pad printing. During the entire pad printing process, if the pad printing head 20 needs to adapt to the printing requirements of different positions on workpieces of different sizes, the horizontal moving component 223 can drive the vertical lifting pad printing station 22 to move in the horizontal direction to adjust the horizontal position of the silicone pad printing head 23.

[0058] (6) Operators set pad printing parameters (inking time, pad printing pressure, pad printing time, lifting speed, etc.) and monitor the equipment's operating status through the human-machine interface. When a fault occurs, the human-machine interface displays fault information, the equipment automatically stops running and alarms.

[0059] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention. The implementation of the present invention is not limited thereto. All other modifications, substitutions or alterations made to the above structure of the present invention based on the above content of the present invention, in accordance with ordinary technical knowledge and common practice in the field, without departing from the basic technical idea of ​​the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A continuous automatic pad printing system for toys, characterized in that, include: A continuous conveying mechanism includes a frame and a horizontal conveyor belt mounted on the frame. The horizontal conveyor belt is equipped with multiple sets of toy workpiece positioning fixtures for carrying toy workpieces and realizing continuous feeding in an assembly line. The pad printing head is located in the middle section of the continuous conveying mechanism, including a gantry frame and a vertical lifting pad printing station set on the gantry frame. The vertical lifting pad printing station integrates a silicone pad printing head, a printing plate ink tray and a doctor blade assembly. A positioning and clamping device is provided on both sides of the pad printing head, and is used to position and clamp the toy workpiece during pad printing; The control cabinet, located at the end of the frame, integrates a printing timing control module and a conveyor linkage control module; A support and adjustment structure is provided at the bottom of the frame, including multiple adjustable feet for adjusting the levelness of the equipment.

2. The continuous automatic pad printing system for toys according to claim 1, characterized in that: The horizontal conveyor belt is a circular conveyor belt, and the multiple sets of toy workpiece positioning fixtures are distributed at equal intervals along the length of the horizontal conveyor belt.

3. The toy continuous automatic pad printing system according to claim 1, characterized in that: The gantry spans above the horizontal conveyor belt, and the vertical lifting and printing station is located on the top beam of the gantry and can be raised and lowered vertically.

4. The continuous automatic pad printing system for toys according to claim 1, characterized in that: The vertical lifting pad printing station includes a lifting drive and a lifting slide. The lifting drive drives the lifting slide to move up and down in the vertical direction, and the silicone pad printing head is installed at the bottom of the lifting slide.

5. The continuous automatic pad printing system for toys according to claim 1, characterized in that: The pad printing head also includes a lateral movement component, which is disposed on the top crossbeam of the gantry frame and is used to drive the vertical lifting pad printing station to move horizontally.

6. The continuous automatic pad printing system for toys according to claim 1, characterized in that: The positioning and clamping device includes positioning cylinders and clamping blocks symmetrically arranged on both sides of the horizontal conveyor belt. The positioning cylinders drive the clamping blocks to move closer to the center, clamping the toy workpiece from both sides.

7. The continuous automatic pad printing system for toys according to claim 1, characterized in that: The control cabinet is equipped with a human-machine interface for displaying equipment operating status, printing parameters and fault information, and receiving user operation commands.

8. The continuous automatic pad printing system for toys according to claim 1, characterized in that: The continuous conveying mechanism also includes a conveying drive motor, which is connected to the horizontal conveyor belt for driving the horizontal conveyor belt to operate intermittently or continuously.

9. The continuous automatic pad printing system for toys according to claim 1, characterized in that: The pad printing head also includes a photoelectric sensor, which is located on the front side of the gantry frame and is used to detect whether the toy workpiece has reached the pad printing station and trigger the pad printing action.

10. A method for continuous automatic pad printing of toys, implemented using the system described in any one of claims 1-9, characterized in that, Includes the following steps: Step S1: Place the toy workpiece on the positioning fixture of the horizontal conveyor belt, and the horizontal conveyor belt continuously transports the toy workpiece to the pad printing station. Step S2: When the toy workpiece arrives at the pad printing station, the positioning and clamping device clamps the toy workpiece from both sides and fixes it in the pad printing position; Step S3: The vertical lifting and lowering station of the pad printing head descends, and the silicone pad printing head dips into the ink from the printing plate ink tray and continues to descend, transferring the ink pattern to the surface of the toy workpiece; Step S4: After pad printing is completed, the silicone pad printing head rises and resets, and the positioning clamping device releases the toy workpiece; Step S5: The horizontal conveyor belt sends the toy workpiece that has been pad-printed out of the pad-printing station and transports the next toy workpiece to be pad-printed to the pad-printing station. Steps S2 to S4 are repeated to achieve continuous automatic pad-printing.

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