Pad printing apparatus

Abstract

This invention provides a pad printing device, including a conveying device and a pad printing device. The conveying device includes a conveying mechanism and a power mechanism. The conveying mechanism includes a fixed frame, a transmission component, a conveying chain, and a positioning component. The conveying chain is movably mounted on the fixed frame via the transmission component. Multiple carriers are evenly distributed on the conveying chain at preset intervals. The carriers are used to place workpieces. The power mechanism actuates to cause the conveying chain to drive the carriers to be conveyed on the fixed frame at preset distances, and the multiple carriers are cyclically conveyed on the fixed frame. The pad printing device is disposed above the conveying device. The area on the conveying mechanism for the pad printing device to perform pad printing is the pad printing area. The positioning component is disposed on the fixed frame and located within the pad printing area. The positioning component actuates to position one or more carriers on the conveying chain within the pad printing area. The workpiece is positioned within the pad printing area along with the carrier for pad printing. The pad printing device of this invention has a wide range of applications, high pad printing efficiency, accurate positioning, and good pad printing effect.

Description

Technical Field

[0001] This invention relates to the field of printing equipment technology, and more particularly to a pad printing device. Background Technology

[0002] Printing is the process of transferring an approved printing plate onto a substrate using printing machinery and specialized inks. The substrate can be the surface of materials such as paper, textiles, plastics, leather, PVC, and PC. Pad printing is one type of printing method that can print text, graphics, and images on irregularly shaped objects. Pad printing is commonly used to print patterns or logos on toys. Some toy cars are small and have delicate structures, leaving limited printing space. If the printing position is off during pad printing, it will affect the overall aesthetics and result in defects. In current technology, the workpiece is generally placed automatically or manually on a specific carrier, and then pad printing is performed using pad printing equipment; however, the material loading and unloading process significantly affects pad printing efficiency. In some cases, a turntable and fixture are used to perform material loading and unloading during pad printing, greatly increasing efficiency; however, because the turntable can be inaccurate in its positioning during transport, and small toy cars are prone to defects due to the turntable's rotational error. Existing pad printing equipment cannot meet the requirements of high-precision and high-efficiency pad printing.

[0003] Therefore, it is necessary to provide a pad printing device that can automatically perform pad printing on workpieces with high efficiency and precise positioning. Summary of the Invention

[0004] The purpose of this invention is to provide a pad printing device that can automatically perform pad printing on workpieces with high efficiency and precise positioning.

[0005] To achieve the above objectives, the present invention provides a pad printing device suitable for single-color or multi-color pad printing on workpieces. The device includes a conveying device and a pad printing device. The conveying device includes a conveying mechanism and a power mechanism. The conveying mechanism includes a fixed frame, a transmission component, a conveying chain, and a positioning component. The conveying chain is movably mounted on the fixed frame via the transmission component. Multiple carriers are evenly distributed on the conveying chain at preset intervals. The carriers are used to place workpieces. The power mechanism actuates to cause the conveying chain to drive the carriers to be conveyed on the fixed frame at preset distances, and the multiple carriers are cyclically conveyed on the fixed frame. The pad printing device is positioned above the conveying device. The area on the conveying mechanism for the pad printing device to perform pad printing is the pad printing area. The positioning component is mounted on the fixed frame and located within the pad printing area. The positioning component actuates to position one or more carriers on the conveying chain within the pad printing area. The workpiece is positioned within the pad printing area along with the carrier for pad printing.

[0006] Preferably, the conveyor chain is provided with a mounting assembly for mounting a vehicle. The mounting assembly includes an interconnected mounting component and a positioning component. The mounting component is fixed to the conveyor chain, and the positioning component is disposed on the mounting component for positioning the vehicle.

[0007] Preferably, the fixed frame is provided with a sliding plate assembly for the positioning member to slide along its outer frame. The fixed frame includes two support components, and a conveying device is disposed between the two support components. Each of the two support components is provided with a sliding plate assembly, and the two sliding plate assemblies protrude from the fixed frame toward the conveyor chain. The positioning member is provided with a sliding part that cooperates with the sliding plate assembly. By sliding the sliding part along the sliding plate assemblies on both sides, the positioning member drives the carrier to circulate and convey along a preset track on the fixed frame.

[0008] Preferably, the skateboard assembly includes a skateboard component and a positioning block. The positioning block is installed below the skateboard component and is located within the pad printing area. The positioning block has a through groove that mates with a positioning component. The positioning component passes through the through groove and acts on the positioning component.

[0009] Preferably, the positioning component includes a positioning cylinder and a positioning push block. The positioning push block is installed at the output end of the positioning cylinder. The positioning component is provided with a positioning groove that cooperates with the positioning push block. The positioning cylinder is activated to make the positioning push block act on the positioning groove so that the carrier is positioned in the pad printing area according to a preset position.

[0010] Preferably, the positioning groove is V-shaped, and the end of the positioning push block used for pushing the material is provided with a positioning part that cooperates with the positioning groove. The positioning part includes two inwardly inclined positioning slopes, which are used to strengthen the cooperation between the positioning push block and the positioning groove.

[0011] Preferably, the power mechanism includes a power component and an upwardly protruding pusher component. The pusher component is elastically mounted on the power component. The power component actuates to cause the pusher component to act on the mounting component and drive the conveyor chain to convey along the fixed frame at a preset distance. The power component drives the pusher component to reset, and the mounting component presses the pusher component to cause the pusher component to elastically contract.

[0012] Preferably, the conveying device is also equipped with a drying device and a discharge port. The drying device is located on one side of the pad printing area. After the workpiece is printed, it is conveyed to the drying device by the conveying device for drying. The discharge port is located on the side of the drying device away from the pad printing area. The discharge port is used for discharging the workpiece.

[0013] Preferably, the pad printing apparatus includes a mounting base and a pad printing mechanism, the pad printing mechanism being movably mounted on the mounting base, the pad printing mechanism including at least one detachable pad printing component, each pad printing component being provided with a print head, the print heads on multiple pad printing components being identical, or the print heads on multiple pad printing components being different.

[0014] Preferably, it also includes a lifting device, which is disposed below the conveying device and is slidably mounted on the mounting base. The lifting device includes a lifting assembly and a traversing assembly, which enable the conveying device to move in the vertical direction and enable the conveying device to move in the horizontal direction.

[0015] After adopting the above technical solution, the pad printing equipment of the present invention is suitable for single-color or multi-color pad printing on workpieces, and can also print one or more workpieces at a time. The pad printing equipment includes a conveying device and a pad printing device. The conveying device includes a conveying mechanism and a power mechanism. The conveying mechanism includes a fixed frame, a transmission assembly, a conveying chain, and a positioning assembly. The conveying chain is movably mounted on the fixed frame via the transmission assembly. Multiple carriers are evenly distributed on the conveying chain at preset intervals, and the carriers are used to place workpieces. The power mechanism actuates to act on the mounting components on the conveying chain, thereby enabling the conveying chain to move around the transmission assembly within the fixed frame, while simultaneously driving the carriers to move along the fixed frame at preset distances. The preset distance can be the distance of one carrier, two carriers, or three, four, five, or six carriers, etc., depending on the actual pad printing needs. One workpiece or a suitable number of workpieces can be printed at a time, and correspondingly, the carriers move the distance of one carrier or a suitable number of carriers each time. Multiple carriers circulate on a fixed frame to ensure uninterrupted loading and unloading during pad printing. The pad printing unit is positioned above the conveyor, with the area on the conveyor for the pad printing unit to process the workpiece. Positioning components are mounted on the fixed frame and located within the pad printing area. The positioning components actuate to position one or more carriers on the conveyor chain within the pad printing area, allowing the workpiece to be positioned with the carrier for printing. There can be one or more positioning components; one positioning component can position multiple carriers simultaneously, or it can position only one carrier. The number of pad printing components on the pad printing unit can be set according to actual needs, suitable for both single-color and multi-color pad printing. Each pad printing component is detachably mounted on a mounting base. In single-color pad printing, the printing heads on multiple pad printing components have identical structures, allowing multiple workpieces to be printed simultaneously. In multi-color pad printing, the printing head structures on multiple pad printing components are different, and the workpiece passes through multiple pad printing components sequentially. The number and specific settings of the printing heads can be configured to other suitable conditions according to actual needs. The pad printing equipment of the present invention can perform monochrome or multicolor pad printing on workpieces, and can also perform pad printing on one or more workpieces at a time. It has high pad printing efficiency, precise positioning, and good pad printing effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of a pad printing device provided in an embodiment of the present invention.

[0018] Figure 2 yes Figure 1 The structural diagram of the pad printing device is shown in the image below.

[0019] Figure 3 yes Figure 2 Internal structure diagram of the transmission device.

[0020] Figure 4 yes Figure 2 Structural diagram of the central fixed frame.

[0021] Figure 5 yes Figure 3 The structural diagram of the positioning component and the mounting component working together.

[0022] Figure 6 yes Figure 5 The structure explodes diagram.

[0023] Figure 7 yes Figure 3 Structural diagram of the power mechanism.

[0024] Figure 8 yes Figure 3 A structural diagram showing the installation components and their interaction with the conveyor chain.

[0025] Figure 9 yes Figure 3 Another structural diagram showing the alignment of the positioning component with the mounting component.

[0026] Figure 10 yes Figure 3 Structure diagram of the positioning component.

[0027] Figure 11 yes Figure 1 Structural diagram of the pad printing device and lifting device.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Pad printing equipment;

[0030] 101. Conveying device;

[0031] 10. Conveying mechanism; 110. Pad printing area; 11. Fixing frame; 111. Support assembly; 112. Slide assembly; 1121. Slide piece; 1122. Positioning block; 1123. Through slot; 12. Conveyor chain; 13. Transmission assembly; 14. Mounting assembly; 141. Mounting piece; 142. Positioning piece; 1421. Sliding part; 1422. Positioning groove; 143. Bearing piece; 15. Positioning assembly; 151. Positioning cylinder; 152. Positioning push block; 153. Positioning part; 1531. Positioning ramp;

[0032] 20. Power mechanism; 21. Pushing assembly; 22. Power assembly;

[0033] 30. Pad printing device; 31. Mounting base; 32. Pad printing mechanism; 321. Pad printing assembly; 33. Color matching tray;

[0034] 40. Drying device;

[0035] 50. Lifting device; 51. Lifting assembly; 52. Horizontal movement assembly; 53. Support structure;

[0036] 60. Discharge port. Detailed Implementation

[0037] To illustrate the technical content and structural features of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0038] Please see Figure 1This invention provides a pad printing device 100, suitable for monochrome or multicolor pad printing on workpieces, and capable of simultaneously printing one or more workpieces. The pad printing device 100 includes a conveying device 101 and a pad printing device 30. The conveying device 101 is used for cyclically conveying a carrier, enabling uninterrupted material handling. The pad printing device 30 is used for pad printing patterns, text, or other logos on workpieces. The conveying device 101 includes a conveying mechanism 10 and a power mechanism 20. The conveying mechanism 10 includes a fixed frame 11, a transmission assembly 13, a conveying chain 12, and a positioning assembly 15. The conveying chain 12 is movably mounted on the fixed frame 11 via the transmission assembly 13. The transmission assembly 13 may consist of at least two sprockets meshing with the conveying chain 12, and the sprockets are rotatably mounted on the fixed frame 11. The power mechanism 20 drives the conveying chain 12 to cyclically convey along the transmission assembly 13. Specifically, multiple carriers are evenly distributed at preset intervals on the conveyor chain 12, and the carriers are used to place workpieces. The multiple carriers are cyclically transported on the fixed frame 11 via the conveyor chain 12, enabling uninterrupted loading and unloading during the pad printing process. The preset interval can be the distance between two printing heads on the pad printing device 30. On the other hand, the power mechanism 20 actuates to cause the conveyor chain 12 to drive the carriers to be transported on the fixed frame 11 at preset distances, and the multiple carriers cyclically transport on the fixed frame 11. The preset distance can be the distance of one carrier, two carriers, or three, four, five, or six carriers, etc., depending on the actual pad printing needs. One workpiece or a suitable number of workpieces can be pad printed each time, and correspondingly, the carriers move the distance of one carrier or a suitable number of carriers each time. In this embodiment, the pad printing device 30 is disposed above the conveyor device 101, and the area on the conveyor mechanism 10 for pad printing by the pad printing device 30 is the pad printing area 110. The positioning component 15 is disposed on the fixed frame 11 and located within the pad printing area 110. The positioning component 15 is activated to position one or more carriers on the conveyor chain 12 within the pad printing area 110, and the workpiece is positioned within the pad printing area 110 along with the carrier for pad printing.

[0039] Please see Figures 3 to 8 In some optional embodiments, the conveyor chain 12 is provided with a mounting assembly 14 for mounting a carrier. The mounting assembly 14 includes a mounting member 141, a positioning member 142, and a carrier member 143. The mounting member 141 is fixed to the conveyor chain 12. The positioning member 142 is disposed on the mounting member 141 and can be used to position the carrier, or the positioning member 142 is provided with the carrier member 143, which is used to mount the carrier.

[0040] Please see Figures 3 to 6In some optional embodiments, the fixing frame 11 is provided with a sliding plate assembly 112 along its outer frame for the positioning member 142 to slide. The fixing frame 11 includes two support assemblies 111, and the conveying device 101 is disposed between the two support assemblies 111. The two support assemblies 111 are used to support and fix the entire conveying device 101. Specifically, a sliding plate assembly 112 is provided on each of the two sets of support assemblies 111, and the two sliding plate assemblies 112 protrude from the fixing frame 11 towards the conveyor chain 12 to cooperate with the positioning member 142 on the conveyor chain 12. The positioning member 142 is provided with a sliding portion 1421 that cooperates with the sliding plate assembly 112. Sliding portions 1421 are provided on both sides of the positioning member 142, and the sliding portions 1421 have an inwardly recessed structure. Through the sliding portions 1421 on both sides, the positioning member 142 can slide along the sliding plate assemblies 112 on both sides, thereby causing the positioning member 142 to drive the carrier to circulate along a preset track on the fixing frame 11. The preset trajectory is the conveying path along which the workpiece on the carrier on the conveyor chain 12 can be accurately transferred by the pad printing device 30 during the conveyor chain 12's transport. Understandably, the carrier is mounted on the conveyor chain 12 via the mounting assembly 14, and the carrier is transported along with the conveyor chain 12. The conveyor chain 12 moves between two sprockets, and there will be a certain degree of floating or swaying. During pad printing, even slight swaying can affect the printing effect. The positioning component 142, in cooperation with the sliding plate assembly 112, ensures the carrier's sliding trajectory, making the carrier's transport smoother. During pad printing, the sliding portions 1421 on both sides of the positioning component 142 cooperate with the sliding plate assembly 112, allowing the carrier to be positioned more stably within the pad printing area 110. Further positioning by the positioning assembly 15 results in higher positional accuracy and better printing effect.

[0041] Please see Figure 5 , Figure 6 , Figure 8 and Figure 9 In some optional embodiments, the slide plate assembly 112 includes a slide plate 1121 and a positioning block 1122. The slide plate 1121 is mounted on the support assembly 111 along the conveyor track of the conveyor chain 12, and the positioning block 1122 is mounted below the slide plate 1121 and is only disposed within the pad printing area 110. The slide plate 1121 is used to cooperate with the positioning member 142 on the mounting assembly 14, and the positioning block 1122 is used to cooperate with the positioning assembly 15. Specifically, the positioning block 1122 has a through groove 1123 that cooperates with the positioning assembly 15, and the positioning assembly 15 passes through the through groove 1123 and acts on the positioning member 142. Understandably, one end of the positioning push block 152 on the positioning component 15 is always located in the through groove 1123. The positioning of the positioning push block 152 by the through groove 1123 enables the positioning push block 152 to act better on the positioning component 142 when it moves, so that the carrier can be better positioned in the pad printing area 110 for pad printing.

[0042] Please see Figure 5 , Figure 6 and Figures 8 to 10 In some optional embodiments, the positioning component 15 includes a positioning cylinder 151 and a positioning push block 152, with the positioning push block 152 mounted on the output end of the positioning cylinder 151. The positioning member 142 is provided with a positioning groove 1422 that cooperates with the positioning push block 152. The positioning cylinder 151 actuates to cause the positioning push block 152 to act on the positioning groove 1422, thereby positioning the carrier within the pad printing area 110 at a preset position. It is understood that when the power mechanism 20 drives the conveyor chain 12 and the carrier for conveying, after the workpiece to be printed enters the pad printing area 110, the conveyor chain 12, due to its flexible structure, may cause the workpiece on the carrier to shake, thus affecting the pad printing effect. The cooperation between the sliding part 1421 on the positioning member 142 and the sliding plate assembly 112 can position the workpiece on the carrier to a certain extent. However, due to the sliding gap between the sliding part 1421 and the sliding plate assembly 112, the carrier on the conveyor chain 12 will still experience a certain range of shaking. A positioning component 15 is provided within the pad printing area 110. This component positions the mounting component 14 below the workpiece to be printed, preventing wobbling and ensuring more precise positioning for better printing results. The preset position is the location where the pad printing device 30 prints the workpiece. Specifically, the positioning groove 1422 is V-shaped. One end of the positioning push block 152, used for pushing the material, has a positioning part 153 that cooperates with the positioning groove 1422. The positioning part 153 includes two inwardly inclined positioning ramps 1531, which reinforce the cooperation between the positioning push block 152 and the positioning groove 1422. The two positioning ramps 1531 are symmetrically arranged and slope inwards from top to bottom to better engage within the V-shaped positioning groove 1422. The angle at which the extended lines of the two positioning inclined surfaces 1531 intersect is approximately the same as the angle of the positioning groove 1422, so that the positioning part 153 can better cooperate with the positioning groove 1422.

[0043] Please see Figure 7In some optional embodiments, the power mechanism 20 includes a power component 22 and an upwardly protruding pusher component 21, which is elastically mounted on the power component 22. The power component 22 includes a motor, a lead screw, a nut seat, etc. The pusher component 21 is mounted on the nut seat. When the motor is activated, the pusher component 21 moves back and forth along the lead screw with the nut seat to push material onto the mounting component 14. Specifically, the power component 22 actuates to cause the pusher component 21 to act on the mounting component 14 and drive the conveyor chain 12 to convey material along the fixed frame 11 at a preset distance. When the power component 22 causes the pusher component 21 to reset, the mounting component 14 presses down on the pusher component 21 to cause it to elastically contract. It is understood that the pusher component 21 includes a pusher block installed at a certain angle, and an elastic element is provided inside the pusher block. There is a certain gap between the two carriers. The pusher assembly 21 is located in the gap between the two carriers. When the motor rotates in one direction, the upward-tilting pusher assembly 21 hooks onto the mounting assembly 14 and carries the mounting assembly 14, the conveyor chain 12 connected to the mounting assembly 14, and the carrier forward together to send the workpiece after pad printing out of the pad printing area 110 and send the workpiece to be pad printed into the pad printing area 110. After feeding is completed, the motor rotates in another direction, and the pusher assembly 21 moves. At this time, during the movement, the back of the pusher assembly 21 first contacts the other mounting assembly 14. The mounting assembly 14 will elastically press the pusher block on the pusher assembly 21 from the back of the pusher assembly 21 along the tilt direction of the pusher assembly 21, so that when the pusher assembly 21 is reset with the power assembly 22, it will not push the mounting assembly 14, thus not affecting the workpiece on the carrier. After the pusher assembly 21 resets and disengages from the pressing of the mounting assembly 14, the elastic element automatically drives the pusher block to reset, so that it can once again push the mounting assembly 14, the conveyor chain 12 connected to the mounting assembly 14, and the carrier to be conveyed on the conveyor assembly.

[0044] Please see Figure 1 and Figure 2In some optional embodiments, the conveying device 101 is also equipped with a drying device 40 and a discharge port 60. The drying device 40 is located on one side of the pad printing area 110; after pad printing, the workpiece is conveyed to the drying device 40 by the conveying device 101 for drying. On the other hand, the discharge port 60 is located on the side of the drying device 40 away from the pad printing area 110, and is used for discharging the workpiece. It is understood that the pad-printed workpiece needs to be dried before discharge to avoid rubbing against the undried pad printing content. After the workpiece is pad-printed, the power mechanism 20 drives the conveyor chain 12 to automatically send the workpiece into the drying device 40 for drying, and the dried workpiece is discharged from the discharge port 60. The carrier is constantly circulated within the fixed frame 11 along with the conveyor chain 12. Specifically, different carriers can be used to suit different workpieces, which can be toy cars, other parts of toy cars, or any other suitable product.

[0045] Please see Figure 1 and Figure 11 In some optional embodiments, the pad printing apparatus 30 includes a mounting base 31 and a pad printing mechanism 32, the pad printing mechanism 32 being movably mounted on the mounting base 31. The pad printing mechanism 32 includes at least one detachable pad printing component 321, each of which is provided with a printing head. The printing heads on multiple pad printing components 321 may be identical, or the printing heads on multiple pad printing components 321 may be different. A plurality of color matching trays 33 are also provided on one side of the pad printing mechanism 32 for holding the ink used for pad printing. On the other hand, the pad printing equipment 100 also includes a lifting device 50, which is disposed below the conveying device 101 and is slidably mounted on the mounting base 31. The lifting device 50 includes a lifting component 51, a traversing component 52, and a support structure 53. The fixing frame 11 and other structures on the fixing frame 11 are mounted on the support structure 53. The lifting assembly 51 enables the conveying device 101 to move vertically, and the lateral movement assembly 52 enables the conveying device 101 to move horizontally. By adjusting the position of the conveying device 101 vertically with the lifting assembly 51 and horizontally with the lateral movement assembly 52, the conveying device 101 can better cooperate with the pad printing device 30, thereby enabling better pad printing of the workpiece.

[0046] like Figures 1 to 11As shown, exemplarily, in monochrome pad printing, if three sets of pad printing components 321 are provided, with identical printing heads on each component 321, and all three sets of components 321 operate simultaneously, then three workpieces are printed each time. Correspondingly, the power mechanism 20 pushes the conveyor chain 12 a distance of three carriers each time, and positions the three workpieces to be printed within the pad printing area 110 via three positioning components 15 for printing. If six sets of pad printing components 321 are provided, with identical printing heads on each component 321, and all six sets of components 321 operate simultaneously, then six workpieces are printed each time. Correspondingly, the power mechanism 20 pushes the conveyor chain 12 a distance of six carriers each time, and positions the six workpieces to be printed within the pad printing area 110 via six positioning components 15 or a positioning element 142 on one positioning component 15 for printing. Of course, depending on actual needs, one, two, or other suitable numbers of workpieces can also be printed each time. In multi-color pad printing, if three sets of pad printing components 321 are provided, each with a different printing head, the three sets of pad printing components 321 operate simultaneously, printing three workpieces at a time, but each printing head prints different content. Each time, the workpieces advance the distance of one carrier, and the printing is completed after each workpiece passes through the three pad printing components 321 in sequence. Correspondingly, the power mechanism 20 pushes the conveyor chain 12 one carrier distance each time, and positions the three workpieces to be printed within the pad printing area 110 using three positioning components 15 for printing. If the printing needs to be completed in six steps, six sets of pad printing components 321 are provided, with each workpiece advancing the distance of one carrier at a time until each workpiece has passed through each pad printing component 321 in sequence. Of course, the number and specific settings of the printing heads can be adjusted according to actual needs.

[0047] like Figures 1 to 11As shown, the pad printing equipment 100 of the present invention is suitable for monochrome or multicolor pad printing on workpieces, and can also print one or more workpieces at a time, thus having a wide range of applications. The pad printing equipment 100 includes a conveying device 101 and a pad printing device 30. The conveying device 101 includes a conveying mechanism 10 and a power mechanism 20. The conveying mechanism 10 includes a fixed frame 11, a transmission assembly 13, a conveying chain 12, and a positioning assembly 15. The conveying chain 12 is movably mounted on the fixed frame 11 via the transmission assembly 13. Multiple carriers are evenly distributed on the conveying chain 12 at preset intervals. The carriers are used to place workpieces, and different carriers can be used for different workpieces. The power mechanism 20 operates to act on the mounting assembly 14 on the conveying chain 12, thereby enabling the conveying chain 12 to circulate within the fixed frame 11 around the transmission assembly 13, while simultaneously driving the carriers to move along the fixed frame 11 at preset distances. The preset distance can be the distance of one carrier, two carriers, or three, four, five, or six carriers, etc. Depending on the actual pad printing needs, one or more suitable workpieces can be pad printed each time. Correspondingly, the carrier moves the distance of one carrier or more suitable carriers each time. Multiple carriers are cyclically conveyed on the fixed frame 11 to achieve uninterrupted loading and unloading during the pad printing process. On the other hand, the pad printing device 30 is positioned above the conveying device 101, and the area on the conveying mechanism 10 for pad printing by the pad printing device 30 is the pad printing area 110. The positioning component 15 is positioned on the fixed frame 11 and located within the pad printing area 110. The positioning component 15 actuates to position one or more carriers on the conveyor chain 12 within the pad printing area 110, and the workpiece is positioned within the pad printing area 110 along with the carrier for pad printing. The number of positioning components 15 can be one or more; one positioning component 15 can simultaneously position multiple carriers, or one positioning component 15 can position only one carrier. The number of pad printing components 321 on the pad printing device 30 can be set according to actual needs, and it can be used for both single-color and multi-color pad printing. Each pad printing component 321 is detachably mounted on the mounting base 31. In single-color pad printing, the printing heads on multiple pad printing components 321 have the same structure, and multiple workpieces can be printed at once. In multi-color pad printing, the printing head structures on multiple pad printing components 321 are different, and the workpieces pass through multiple pad printing components 321 sequentially. The number and specific settings of the pad printing heads can be set to other suitable situations according to actual needs. According to the pad printing requirements of different workpieces, the position of the conveying device 101 can also be adjusted in the vertical and horizontal directions by the lifting device 50. The pad printing device 100 of the present invention can perform single-color or multi-color pad printing on workpieces, and can also print one or more workpieces at once, with high pad printing efficiency, accurate positioning, and good pad printing effect.

[0048] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are within the scope of the present invention.

Claims

1. Pad printing apparatus suitable for single colour pad printing or multi-colour pad printing on a workpiece, characterised in that, The device includes a conveying device and a pad printing device. The conveying device includes a conveying mechanism and a power mechanism. The conveying mechanism includes a fixed frame, a transmission assembly, a conveying chain, and a positioning assembly. The conveying chain is movably mounted on the fixed frame via the transmission assembly. Multiple carriers are evenly distributed on the conveying chain at preset intervals. The carriers are used to place the workpiece. The power mechanism actuates to cause the conveying chain to drive the carriers to move along the fixed frame at preset distances, and the multiple carriers circulate along the fixed frame. The pad printing device is positioned above the conveying device. The area on the conveying mechanism for the pad printing device to perform the printing is the printing area. The positioning assembly is mounted on the fixed frame and located within the printing area. The positioning assembly actuates to position one or more carriers on the conveying chain within the printing area. The workpiece is positioned within the printing area along with the carrier for printing. The conveying chain is provided with a mounting assembly for mounting the carriers. The mounting assembly includes interconnected mounting parts and... A positioning component is provided on the mounting component, which is fixed to the conveyor chain. The positioning component is used to position and install the carrier. The power mechanism includes a power component and an upwardly protruding pusher component. The pusher component is elastically mounted on the power component and includes a pusher block installed at a certain angle, with an elastic element inside the pusher block. There is a certain gap between the two carriers. The pusher component is located in the gap between the two carriers. The power component moves to make the pusher component act on the mounting component and drive the conveyor chain to convey the workpiece on the fixed frame at a preset distance. When the power component moves in another direction, the pusher component moves. During the movement, the back of the pusher component first contacts the other mounting components. The mounting components will elastically press the pusher block from the back of the pusher component along the tilt direction of the pusher component, so that when the pusher component returns to its original position with the power component, it will not push the mounting component, thus not affecting the workpiece on the carrier.

2. Pad printing apparatus according to claim 1, characterized in that The fixed frame is provided with a sliding plate assembly for the positioning member to slide along its outer frame. The fixed frame includes two support components, and the conveying device is disposed between the two support components. The sliding plate assembly is provided on both support components, and the two sliding plate assemblies protrude from the fixed frame toward the conveyor chain. The positioning member is provided with a sliding part that cooperates with the sliding plate assembly. By sliding the sliding part along the sliding plate assemblies on both sides, the positioning member drives the carrier to circulate and convey along a preset track on the fixed frame.

3. Pad printing apparatus according to claim 2, characterized in that The skateboard assembly includes a skateboard component and a positioning block. The positioning block is installed below the skateboard component and is located within the pad printing area. The positioning block has a through groove that mates with the positioning component. The positioning component passes through the through groove and acts on the positioning component.

4. Pad printing apparatus according to claim 1, characterized in that The positioning component includes a positioning cylinder and a positioning push block. The positioning push block is installed at the output end of the positioning cylinder. The positioning component is provided with a positioning groove that cooperates with the positioning push block. The positioning cylinder is actuated to make the positioning push block act on the positioning groove so that the carrier is positioned in the pad printing area at a preset position.

5. Pad printing apparatus according to claim 4, characterized in that The positioning groove is V-shaped, and the end of the positioning push block used for pushing the material is provided with a positioning part that cooperates with the positioning groove. The positioning part includes two inwardly inclined positioning slopes, which are used to reinforce the cooperation between the positioning push block and the positioning groove.

6. The pad printing apparatus according to claim 1, characterized by The conveying device is also equipped with a drying device and a discharge port. The drying device is located on one side of the pad printing area. After the workpiece is pad printed, it is conveyed to the drying device by the conveying device for drying. The discharge port is located on the side of the drying device away from the pad printing area. The discharge port is used for discharging the workpiece.

7. The pad printing apparatus of claim 1, wherein The pad printing device includes a mounting base and a pad printing mechanism. The pad printing mechanism is movably mounted on the mounting base. The pad printing mechanism includes at least one detachable pad printing component. Each pad printing component is provided with a printing head. The printing heads on multiple pad printing components are all the same, or the printing heads on multiple pad printing components are all different.

8. The pad printing apparatus according to claim 7, characterized in that, It also includes a lifting device, which is disposed below the conveying device and is slidably mounted on the mounting base. The lifting device includes a lifting assembly and a lateral movement assembly, which enables the conveying device to move in the vertical direction and the lateral movement assembly enables the conveying device to move in the horizontal direction.

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