Online ink cup type pad printing machine for injection molding production and control method of online ink cup type pad printing machine

Abstract

The invention discloses an online ink cup type pad printing machine for injection molding production and a control method thereof, and relates to the technical field of industrial printing equipment, the online ink cup type pad printing machine comprises a pad printing machine main body, the pad printing machine main body is provided with a working table, the working table is provided with an ink supply assembly, and the pad printing machine main body is provided with a pad printing rubber head above the ink supply assembly; a placing seat for placing a workpiece is arranged on the side wall of the pad printing machine main body, a rubber head cleaning assembly corresponding to the pad printing rubber head in shape is arranged on the working table, the rubber head cleaning assembly comprises a cleaning rubber belt positioned below the pad printing rubber head and a roller for winding and unwinding the cleaning rubber belt, and the pad printing machine main body is provided with a driving motor I for driving the roller to rotate. According to the rubber head cleaning assembly, the cleaning operation of the pad printing rubber head can be automatically completed through the cooperation of the cleaning rubber belt and the roller, shutdown time consumption caused by manual cleaning is prevented, redundant ink, dust and chippings on the surface of the rubber head are effectively removed, printing defects caused by rubber head pollution are reduced from the source, and the product yield and the production efficiency are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of industrial printing equipment technology, and in particular to an online ink cup pad printing machine for injection molding production and its control method. Background Technology

[0002] Injection molding is a widely used core process in the plastics processing industry. After molding, injection molded parts often require surface pad printing to print key information such as product identification and functional patterns to meet product usage requirements and market competitiveness. As the manufacturing industry transforms towards automation, intensification, and efficiency, the pad printing process, as a crucial subsequent step in injection molding production, directly impacts overall production efficiency, product quality, and comprehensive production costs due to its synergy with the injection molding process, equipment integration, and operational continuity. Therefore, achieving seamless integration between pad printing equipment and injection molding production has become an important direction for industry optimization and upgrading.

[0003] Currently, the core components of pad printing equipment used in industrial production for injection molded parts include ink supply components, pad printing head, drive structure for driving the pad printing head, support structure for placing the workpiece, and transfer structure for driving the support structure to move. After the injection molded workpiece is completed, it is transported to the pad printing station for printing via the transfer structure.

[0004] Regarding the aforementioned technologies, the inventors believe that after multiple printings, the printing head will accumulate dust and debris, leading to poor printing quality. Manual cleaning reduces production efficiency and affects process stability. Summary of the Invention

[0005] The purpose of this application is to provide an inline ink cup pad printing machine and its control method for injection molding production, so as to improve the problems that the pad will be contaminated with dust and debris after multiple printings, resulting in poor printing, reduced production efficiency due to pad contamination, and affected process stability due to manual cleaning.

[0006] This application provides an inline ink cup type pad printing machine for injection molding production and its control method, which adopts the following technical solution: An inline ink cup pad printing machine for injection molding production includes a main body, a worktable, an ink supply assembly, a pad printing head and a drive assembly for moving the pad printing head, a workpiece placement seat on the side wall of the main body, a transfer assembly for moving the placement seat, a head cleaning assembly corresponding to the pad printing head on the worktable, the head cleaning assembly including a cleaning tape located below the pad printing head and a roller for receiving and releasing the cleaning tape, and a drive motor for rotating the roller on the main body.

[0007] By adopting the above technical solution, the pad cleaning component can automatically complete the cleaning operation of pad printing pads by using the cleaning tape and roller in conjunction with the power output of the drive motor, replacing the traditional manual cleaning method. This not only avoids the downtime caused by manual cleaning, but also effectively removes excess ink, dust and debris from the surface of the pad, reducing printing defects caused by pad contamination from the source, and significantly improving product yield and production efficiency.

[0008] Optionally, the ink supply assembly includes a pad printing steel plate that moves along the length of the worktable and a closed ink cup that is upside down on the upper surface of the pad printing steel plate. A sealed space for containing ink is formed between the pad printing steel plate and the upside-down closed ink cup. The worktable is provided with a mounting bracket connected to the closed ink cup. The main body of the pad printing machine is provided with a drive cylinder that drives the pad printing steel plate to move directly below the pad printing head.

[0009] By adopting the above technical solution, the ink supply component uses an inverted, closed ink cup in conjunction with the pad printing steel plate to form a sealed ink-containing space, blocking the evaporation path of the ink solvent. This not only maintains the long-term stability of ink viscosity, ensuring that the printed pattern is always clear and complete, and preventing problems such as blurry or incomplete patterns caused by ink evaporation, but also prevents the spread of irritating odors, improves the workshop working environment, and meets environmental protection production requirements. The mounting frame provides stable installation support for the closed ink cup, preventing the ink cup from shifting during equipment operation and ensuring ink supply stability. The drive cylinder can precisely drive the pad printing steel plate to move directly below the pad printing head, so that the pattern area on the pad printing steel plate is precisely aligned with the pad printing head, providing precise positional assurance for subsequent ink dipping operations and improving the accuracy of printing position.

[0010] Optionally, the transfer assembly includes a movable seat disposed on the side wall of the pad printing machine body and a second drive cylinder for driving the movable seat to move along the height direction of the pad printing machine body. The movable seat is provided with a linear drive module for driving the placement seat to move toward the worktable surface.

[0011] By adopting the above technical solution, the transfer component carries the placement seat through the moving seat, and the second drive cylinder can flexibly adjust the position of the moving seat along the height direction of the pad printing machine body, which can adapt to the printing needs of injection molded parts of different heights and specifications, greatly improving the versatility of the equipment; the first linear drive module on the moving seat can drive the placement seat to move towards the worktable, realizing the workpiece moving from the placement position to the printing station, eliminating the need for manual handling of the workpiece, reducing the risk of collision and scratch during the handling process, shortening the workpiece transfer path, improving the production cycle, and laying the foundation for automated continuous production.

[0012] Optionally, the driving end of the linear drive module one is provided with a linear drive module two that drives the placement seat to move along the length direction of the cleaning tape. The linear drive module two is arranged perpendicular to the driving direction of the linear drive module one, and the bottom of the moving seat is provided with a guide rod that is slidably connected to the pad printing machine body.

[0013] By adopting the above technical solution, the second linear drive module and the first linear drive module are set vertically, forming a two-dimensional drive system. This system can drive the placement seat to move flexibly in multiple directions on the horizontal plane. It can accurately adjust the position of the placement seat according to workpieces of different sizes and printing position requirements, ensuring that the printing area of ​​the workpiece is precisely aligned with the pad printing head.

[0014] Optionally, a support plate is provided on the upper surface of the workbench below the pad printing head. The upper part of the support plate is in contact with the cleaning tape. The pad printing steel plate extends out and is located above the support plate, with a clearance between the steel plate and the support plate corresponding to the cleaning tape.

[0015] By adopting the above technical solution, the support plate on the workbench provides a stable support base for the cleaning tape. When the pad printing head presses down and contacts the cleaning tape, the support plate can offset part of the downward pressure, allowing the cleaning tape to fully adhere to the surface of the printing head, improving the effect of removing impurities and preventing the problem of incomplete cleaning due to the lack of support for the tape. After the pad printing steel plate extends out, it is located above the support plate, and the clearance reserved between the two can prevent the pad printing steel plate from colliding or rubbing with the support plate or the cleaning tape during the movement, ensuring that the movement of the pad printing steel plate of the ink supply component and the cleaning operation of the printing head cleaning component do not interfere with each other.

[0016] Optionally, the driving assembly includes a third driving cylinder for driving the pad printing head downward, a movable frame connected to the third driving cylinder is slidably arranged on the side wall of the pad printing machine body above the worktable, and a fourth driving cylinder for driving the movable frame to move is arranged on the side wall of the pad printing machine body.

[0017] By adopting the above technical solution, the drive assembly directly controls the up and down movement of the pad printing head through the drive cylinder three. This allows for precise adjustment of the downward pressure of the head, ensuring full contact between the head and the workpiece surface and the pad printing plate to complete ink transfer and printing. Excessive pressure prevents workpiece damage or head deformation, ensuring both printing quality and workpiece integrity. The sliding frame connected to the side wall of the pad printing machine provides a mounting carrier for the pad printing head. The drive cylinder four drives the frame to move laterally, enabling the pad printing head to flexibly switch between the ink-dipping station above the pad printing plate and the printing station above the workpiece. This high-precision movement shortens station switching time and improves production efficiency.

[0018] Optionally, the support plate has an extension plate rotatably connected to the roller on its side wall, and a guide roller corresponding to the cleaning tape is rotatably provided on the side wall of the extension plate. The guide roller guides the cleaning tape to the upper surface of the support plate so that the pad printing head is pressed down and abuts against the cleaning tape and the support plate to clean the pad printing head.

[0019] By adopting the above technical solution, the guide roller can guide and tension the cleaning tape, smoothly guide the cleaning tape to the upper surface of the support plate and keep it in a close fit, prevent the cleaning tape from shifting, wrinkling or loosening during the movement, and ensure that the pad printing head can make full and uniform contact with the cleaning tape when it is pressed down, thereby improving the cleaning effect.

[0020] Optionally, the placement seat is provided with positioning blocks for fixing the workpiece at both ends, and a limiting protrusion that abuts against the side wall of the workpiece is provided on one side of the placement seat.

[0021] By adopting the above technical solution, the positioning blocks at both ends of the placement seat can limit and fix the workpiece from both axial ends, while the limiting protrusion on one side of the placement seat abuts against the radial side wall of the workpiece. The two form a multi-directional positioning constraint structure, which can firmly fix the workpiece on the placement seat, effectively preventing the workpiece from being displaced or shaken due to vibration or movement during the transfer process or due to the pressure of the printing head during printing. This ensures that the printed pattern is always accurately printed in the preset position, significantly improving printing accuracy and product qualification rate.

[0022] A control method for an inline ink cup pad printing machine used in injection molding production includes the following steps: S100: The workpiece to be printed is placed on the placement seat. The workpiece is positioned and fixed by the positioning blocks at both ends of the placement seat and the limiting protrusion on one side. The pad printing steel plate moves to the bottom of the pad printing head, the pad printing head moves down to pick up the ink pattern, and then the pad printing steel plate is reset. S200, the transfer component drives the placement seat and workpiece to move to the preset printing height. Then, the linear drive module one and the linear drive module two move in sequence, driving the placement seat and the positioned workpiece to move toward the worktable and accurately transfer them to the printing station directly below the pad printing head along the length of the cleaning tape. S300: The pad printing head moves above the workpiece to complete printing and then resets. The pad cleaning component starts to clean the pad printing head, and the transfer component moves the printed workpiece out of the printing station.

[0023] The control method for an online ink cup pad printing machine also includes the following steps: S110, the pad printing steel plate is driven to move by the first drive cylinder, which forms a sealed space with the inverted closed ink cup to ensure ink stability; the pad printing head is driven by the fourth drive cylinder to move laterally to the top of the pad printing steel plate, and then driven by the third drive cylinder to move down to complete the ink dipping. After dipping, the pad printing steel plate automatically returns to the initial position. S310: The pad printing head is driven to the top of the workpiece by the fourth drive cylinder, and the third drive cylinder controls the downward pressure to complete the printing. When cleaning the pad printing head, the support plate and cleaning tape are exposed after the pad printing steel plate is reset. The first drive motor drives the roller to rotate, and the guide roller guides the cleaning tape to the upper surface of the support plate. The pad printing head moves down and abuts against the cleaning tape and the support plate to remove excess ink and impurities from the surface. After cleaning is completed, the pad printing head is reset.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The pad cleaning assembly automatically cleans the pad printing pad by using a cleaning tape and roller, preventing downtime caused by manual cleaning. It effectively removes excess ink, dust and debris from the pad surface, reducing printing defects caused by pad contamination at the source and significantly improving product yield and production efficiency. 2. The ink supply assembly uses an inverted, closed ink cup in conjunction with the pad printing steel plate to form a sealed ink-containing space, blocking the evaporation path of the ink solvent. This not only maintains the long-term stability of the ink viscosity, ensuring that the printed pattern is always clear and complete, and preventing problems such as blurry or incomplete patterns caused by ink evaporation, but also prevents the spread of irritating odors, improves the workshop working environment, and meets the requirements of environmentally friendly production. 3. The support plate on the workbench provides a stable support base for the cleaning tape. When the pad printing head presses down and contacts the cleaning tape, the support plate can offset part of the downward pressure, allowing the cleaning tape to fully adhere to the surface of the printing head, improving the effect of removing impurities and preventing incomplete cleaning due to the lack of support for the tape. The pad printing steel plate extends out and is located above the support plate, and the clearance reserved between the two can prevent the pad printing steel plate from colliding or rubbing against the support plate or cleaning tape during movement, ensuring that the movement of the pad printing steel plate of the ink supply assembly and the cleaning operation of the printing head cleaning assembly do not interfere with each other. Attached Figure Description

[0025] Figure 1 This is an overall schematic diagram of an inline ink cup pad printing machine used in injection molding production. Figure 2 This is a partial sectional view of an inline ink cup pad printing machine; Figure 3 yes Figure 2 A magnified view of part A in the middle.

[0026] In the diagram, 1. Main body of the pad printing machine; 11. Worktable; 12. Support plate; 13. Clearance; 2. Ink supply assembly; 21. Pad printing steel plate; 22. Enclosed ink cup; 23. Mounting bracket; 24. Drive cylinder one; 3. Pad printing pad; 4. Drive assembly; 41. Drive cylinder three; 42. Moving frame; 43. Drive cylinder four; 5. Placement seat; 51. Positioning block; 52. Limiting protrusion; 6. Workpiece; 7. Transfer assembly; 71. Moving seat; 72. Drive cylinder two; 73. Linear drive module one; 74. Linear drive module two; 75. Guide rod; 8. Pad cleaning assembly; 81. Cleaning tape; 82. Roller; 83. Drive motor one; 84. Extension plate; 85. Guide roller. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below. Example

[0028] An inline ink cup pad printing machine for injection molding production, with reference to Figure 1 and Figure 2 The system includes a pad printing machine body 1, a flat worktable 11 installed in the pad printing machine body 1, and an ink supply assembly 2 installed in a preset area on the worktable 11. The ink supply assembly 2 includes a pad printing steel plate 21 that is slidably connected to the worktable 11 along the length of the worktable 11 via a sliding block, and a closed ink cup 22 that is upside down and set on the upper surface of the pad printing steel plate 21. A mounting bracket 23 connected to the closed ink cup 22 is installed on the worktable 11. The height and angle of the mounting bracket 23 are adjusted to ensure that the closed ink cup 22 can be accurately upside down on the upper surface of the pad printing steel plate 21, forming a well-sealed space between them to contain ink. The pad printing machine body 1 is provided with a drive cylinder 24 that drives the pad printing steel plate 21 to move directly below the pad printing head 3. The cylinder body of the drive cylinder 24 is fixed inside the pad printing machine body 1, and its piston rod is connected to the bottom of the pad printing steel plate 21, which can drive the pad printing steel plate 21 to move back and forth along the sliding direction.

[0029] Reference Figure 1 and Figure 2The pad printing machine body 1 is located directly above the ink supply assembly 2 and has a pad printing head 3 and a drive assembly 4 for moving the pad printing head 3. The side wall of the pad printing machine body 1 is slidably connected to the moving frame 42 in the drive assembly 4 via a slide rail. The drive cylinder 43 in the drive assembly 4 is installed in the pad printing machine body 1. The piston rod of the drive cylinder 43 is fixedly connected to the moving frame 42 and can drive the moving frame 42 to slide up and down along the slide rail. The drive cylinder 41 is installed on the moving frame 42. Its piston rod is fixedly connected to the pad printing head 3 with its piston rod facing down. The up and down movement of the pad printing head 3 is achieved by the extension and retraction of the drive cylinder 41, thereby adjusting the distance between the head and the pad printing steel plate 21 and the workpiece 6.

[0030] Reference Figure 1 and Figure 2 A transfer assembly 7 is installed on one side wall of the pad printing machine body 1. The transfer assembly 7 includes a movable seat 71 disposed on the side wall of the pad printing machine body 1, and a second drive cylinder 72 for driving the movable seat 71 to move along the height direction of the pad printing machine body 1. The cylinder body of the second drive cylinder 72 is fixed to the lower part of the pad printing machine body 1, and the piston rod of the second drive cylinder 72 is connected to the bottom of the movable seat 71 for driving the movable seat 71 to rise and fall along the height direction. A guide rod 75 that is slidably connected to the pad printing machine body 1 is installed at the bottom of the movable seat 71. A linear drive module 1 that is electrically connected to a power source is installed on the movable seat 71 to drive the placement seat 5 to move. 73, whose driving direction is towards the worktable 11, the driving end of linear drive module 1 73 is connected to linear drive module 2 74, the driving direction of linear drive module 2 74 is perpendicular to linear drive module 1 73 and moves along the length of cleaning tape 81, fixing the placement seat 5 to the driving end of linear drive module 2 74, and realizing multi-directional movement with the linkage of the two modules; the two ends of the placement seat 5 are symmetrically provided with adjustable positioning blocks 51, and one side is integrally formed with a limiting protrusion 52. The positions of the positioning blocks 51 and the limiting protrusion 52 are preset according to the common workpiece 6 size to ensure that the workpiece 6 can be accurately positioned after placement.

[0031] Reference Figure 2 and Figure 3A pad cleaning assembly 8, corresponding to the pad printing pad 3, is installed on the worktable 11. The pad cleaning assembly 8 includes a cleaning tape 81 located below the pad printing pad 3 and a roller 82 for receiving and releasing the cleaning tape 81. The pad printing machine body 1 is equipped with a drive motor 83 that drives the roller 82 to rotate. A support plate 12 is installed on the upper surface of the worktable 11 below the pad printing pad 3. Its top surface remains horizontal and in contact with the cleaning tape 81, and corresponds to the downward movement trajectory of the pad printing pad 3. An extension plate 84 extends from one side of the support plate 12. The roller 82 is rotatably connected to the side wall of the extension plate 84 via bearings. The middle part of 4 is rotatably connected to the guide roller 85 via a bearing. One end of the cleaning tape 81 is wound around the take-up end of the roller 82, and the other end passes around the guide roller 85 and is connected to the unwinding end of the roller 82, so that the middle section of the cleaning tape 81 is attached to the upper surface of the support plate 12 to form a flat cleaning contact surface. After the pad printing steel plate 21 extends out, it is located above the support plate 12 and a clearance 13 corresponding to the cleaning tape 81 is left between it and the support plate 12. The housing of the drive motor 83 is fixed on the outside of the extension plate 84, and its output shaft is connected to one end of the roller 82 via a coupling to provide power for the rotation of the roller 82. Example

[0032] A control method for an inline ink cup pad printing machine used in injection molding production includes the following steps: S100, the workpiece 6 to be printed is placed on the placement seat 5. The workpiece 6 is positioned and fixed by the positioning blocks 51 at both ends of the placement seat 5 and the limiting protrusion 52 on one side. The pad printing steel plate 21 moves to the bottom of the pad printing head 3. The pad printing head 3 moves down to pick up the ink pattern. Then the pad printing steel plate 21 is reset. S110, the pad printing plate 21 is driven to move by the first drive cylinder 24, which forms a sealed space with the inverted closed ink cup 22 to ensure ink stability; the pad printing head 3 is driven by the fourth drive cylinder 43 to move laterally to the top of the pad printing plate 21, and then driven by the third drive cylinder 41 to move down to complete the ink dipping. After dipping, the pad printing plate 21 automatically returns to the initial position. S200, the transfer component 7 drives the placement seat 5 and the workpiece 6 to move to the preset printing height. Then, the linear drive module 1 73 and the linear drive module 2 74 move in sequence, driving the placement seat 5 and the positioned workpiece 6 to move toward the worktable 11, and accurately transfer them along the length of the cleaning tape 81 to the printing station directly below the pad printing head 3. S300, the pad printing head 3 moves above the workpiece 6 to complete the printing and resets. The head cleaning component 8 starts to clean the pad printing head 3. The transfer component 7 moves the printed workpiece 6 out of the printing station. S310, the pad printing head 3 is driven to the top of the workpiece 6 by the drive cylinder 43, and the drive cylinder 41 controls the downward pressure to complete the printing; when cleaning the head, after the pad printing steel plate 21 is reset, the support plate 12 and the cleaning tape 81 are exposed. The drive motor 83 drives the roller 82 to rotate, and the guide roller 85 guides the cleaning tape 81 to the upper surface of the support plate 12. The pad printing head 3 moves down and abuts against the cleaning tape 81 and the support plate 12 to remove excess ink and impurities from the surface. After cleaning is completed, the pad printing head 3 is reset.

[0033] The implementation principle of this application embodiment is as follows: In use, the injection molded part to be printed is placed on the placement seat 5, with both ends of the workpiece 6 abutting against the positioning block 51 and the sidewalls fitting against the limiting protrusion 52, thus completing the positioning and fixing of the workpiece 6. Then, the drive cylinder 1 24 is activated, pushing the pad printing steel plate 21 to move directly below the pad printing head 3, so that the preset pattern area on the pad printing steel plate 21 is precisely aligned with the pad printing head 3. At this time, the ink in the sealed space formed by the closed ink cup 22 and the pad printing steel plate 21 is evenly distributed in the pattern area. The drive cylinder 43 drives the moving frame 42 to move the pad printing head 3 downward to above the pad printing steel plate 21. The drive cylinder 3 41 is activated, pushing the pad printing head 3 downward to contact the ink pattern on the pad printing steel plate 21. After ink dipping is completed, the drive cylinder 3 41 moves the pad printing head 3 upward to reset, and the drive cylinder 1 24 pulls the pad printing steel plate 21 back to its initial position. The transfer assembly 7 is then activated. Drive cylinder 2 72 drives the moving seat 71 to adjust to the preset position along the height direction according to the printing height requirement of the workpiece 6. The guide rod 75 plays a guiding and stabilizing role during the movement of the moving seat 71. The linear drive module 1 73 is activated, pushing the placement seat 5 and the workpiece 6 to move towards the worktable 11. When it approaches the printing area, the linear drive module 2 74 is activated, driving the placement seat 5 to make a slight adjustment along the length direction of the cleaning tape 81, accurately transferring the printing area of ​​the workpiece 6 to directly below the pad printing head 3. Drive cylinder 43 drives the moving frame 42 again to move the pad printing head 3 after ink dipping to above the workpiece 6. Drive cylinder 3 41 is activated, controlling the pad printing head 3 to move down and contact the surface of the workpiece 6 with a preset pressure. After the printing operation is completed, drive cylinder 3 41 drives the pad printing head 3 to move up and reset. At the same time, the pad cleaning assembly 8 is activated, and the drive motor 83 drives the roller 82 to rotate, so that the new cleaning tape 81 at the unwinding end passes around the guide roller 85 and adheres to the upper surface of the support plate 12. The rewinding end then recycles the used cleaning tape 81. The drive cylinder 41 drives the pad printing pad 3 to move down again, so that the surface of the pad makes full contact with the new cleaning tape 81 on the support plate 12. The adhesiveness of the tape removes excess ink, dust and debris remaining on the surface. After cleaning, the pad printing pad 3 moves up and resets. Finally, the linear drive modules 73 and 74 start in reverse, moving the placement seat 5 along with the printed workpiece 6 out of the printing station. The drive cylinder 75 drives the moving seat 71 to reset to the initial position, completing one complete pad printing cycle. By using the cleaning tape 81 and roller 82 together, the cleaning operation of pad printing pad 3 can be completed automatically, preventing downtime caused by manual cleaning, effectively removing excess ink, dust and debris from the surface of the pad, reducing printing defects caused by pad contamination from the source, and significantly improving product yield and production efficiency.

[0034] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An inline ink cup pad printing machine for injection molding production, characterized in that: The device includes a pad printing machine body (1), which is provided with a worktable (11). The worktable (11) is provided with an ink supply assembly (2). The pad printing machine body (1) is provided with a pad printing head (3) and a drive assembly (4) for moving the pad printing head (3) above the ink supply assembly (2). The side wall of the pad printing machine body (1) is provided with a placement seat (5) for placing workpieces (6). The side wall of the pad printing machine body (1) is provided with a transfer assembly (7) for moving the placement seat (5). The worktable (11) is provided with a head cleaning assembly (8) corresponding to the pad printing head (3). The head cleaning assembly (8) includes a cleaning tape (81) located below the pad printing head (3) and a roller (82) for receiving and releasing the cleaning tape (81). The pad printing machine body (1) is provided with a drive motor (83) for rotating the roller (82).

2. The inline ink cup pad printing machine for injection molding production according to claim 1, characterized in that: The ink supply assembly (2) includes a pad printing steel plate (21) that moves along the length of the workbench (11) and a closed ink cup (22) that is upside down on the upper surface of the pad printing steel plate (21). A sealed space for containing ink is formed between the pad printing steel plate (21) and the upside-down closed ink cup (22). The workbench (11) is provided with a mounting bracket (23) that is connected to the closed ink cup (22). The pad printing machine body (1) is provided with a drive cylinder (24) that drives the pad printing steel plate (21) to move directly below the pad printing head (3).

3. The inline ink cup type pad printing machine for injection molding production according to claim 2, characterized in that: The transfer assembly (7) includes a movable seat (71) disposed on the side wall of the pad printing machine body (1) and a second drive cylinder (72) for driving the movable seat (71) to move along the height direction of the pad printing machine body (1). The movable seat (71) is provided with a linear drive module (73) for driving the placement seat (5) to move toward the worktable (11).

4. The inline ink cup pad printing machine for injection molding production according to claim 3, characterized in that: The driving end of the linear drive module one (73) is provided with a linear drive module two (74) that moves the drive placement seat (5) along the length direction of the cleaning tape (81). The linear drive module two (74) is arranged perpendicular to the driving direction of the linear drive module one (73). The bottom of the moving seat (71) is provided with a guide rod (75) that is slidably connected to the pad printing machine body (1).

5. The inline ink cup type pad printing machine for injection molding production according to claim 4, characterized in that: The upper surface of the workbench (11) is provided with a support plate (12) located below the pad printing head (3). The upper part of the support plate (12) is in contact with the cleaning tape (81). The pad printing steel plate (21) extends out and is located above the support plate (12), with a clearance gap (13) between it and the support plate (12) corresponding to the cleaning tape (81).

6. The inline ink cup type pad printing machine for injection molding production according to claim 5, characterized in that: The drive assembly (4) includes a third drive cylinder (41) for driving the pad printing head (3) to move downwards. A movable frame (42) connected to the third drive cylinder (41) is slidably arranged on the side wall of the pad printing machine body (1) above the worktable (11). A fourth drive cylinder (43) for driving the movable frame (42) to move is arranged on the side wall of the pad printing machine body (1).

7. An inline ink cup pad printing machine for injection molding production according to claim 6, characterized in that: The support plate (12) has an extension plate (84) rotatably connected to the roller (82) on its side wall. The extension plate (84) has a guide roller (85) rotatably connected to the cleaning tape (81) on its side wall. The guide roller (85) guides the cleaning tape (81) to the upper surface of the support plate (12) so that the pad printing head (3) is pressed down and abuts against the cleaning tape (81) and the support plate (12) to clean the pad printing head (3).

8. An inline ink cup pad printing machine for injection molding production according to claim 7, characterized in that: The placement seat (5) is provided with positioning blocks (51) for fixing the workpiece (6) at both ends, and a limiting protrusion (52) that abuts against the side wall of the workpiece (6) is provided on one side of the placement seat (5).

9. A control method for an inline ink cup pad printing machine used in injection molding production, characterized in that: Including the inline ink cup pad printing machine for injection molding production as described in claim 8, S100, the workpiece (6) to be printed is placed on the placement seat (5). The workpiece (6) is positioned and fixed by the positioning blocks (51) at both ends of the placement seat (5) and the limiting protrusion (52) on one side. The pad printing steel plate (21) moves to the bottom of the pad printing head (3). The pad printing head (3) moves down to pick up the ink pattern. Then the pad printing steel plate (21) is reset. S200, the transfer component (7) drives the placement seat (5) and the workpiece (6) to move to the preset printing height. Then, the linear drive module one (73) and the linear drive module two (74) move in sequence, driving the placement seat (5) and the positioned workpiece (6) to move toward the worktable (11) and accurately transfer them along the length of the cleaning tape (81) to the printing station directly below the pad printing head (3). S300, the pad printing head (3) moves above the workpiece (6) to complete the printing and resets. The pad cleaning component (8) starts to clean the pad printing head (3). The transfer component (7) moves the printed workpiece (6) out of the printing station.

10. A control method for an inline ink cup pad printing machine for injection molding production according to claim 9, characterized in that: S110, the pad printing plate (21) is driven to move by the first driving cylinder (24), and it forms a sealed space with the inverted closed ink cup (22) to ensure ink stability; the pad printing head (3) is driven by the fourth driving cylinder (43) to move laterally to the top of the pad printing plate (21), and then driven by the third driving cylinder (41) to move down to complete the ink dipping. After dipping, the pad printing plate (21) automatically returns to the initial position; S310, the pad printing head (3) is driven by the fourth driving cylinder (43) to the top of the workpiece (6), and the third driving cylinder (41) controls the downward pressure to complete the printing; when the head is cleaned, the support plate (12) and the cleaning tape (81) are exposed after the pad printing steel plate (21) is reset. The first driving motor (83) drives the roller (82) to rotate, and the guide roller (85) guides the cleaning tape (81) to the upper surface of the support plate (12). The pad printing head (3) moves down and abuts against the cleaning tape (81) and the support plate (12) to remove excess ink and impurities from the surface. After cleaning is completed, the pad printing head (3) is reset.

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