Automatic transfer printing equipment

Abstract

The utility model discloses an automatic pad printing device which comprises a working table and a machine frame arranged on the working table, a printing plate device, an ink supply device, a printing device and a driving device are arranged on the machine frame, and the printing plate device comprises a rubber head, a first driving mechanism and a second driving mechanism. The ink supply device comprises a pad printing oil cup and a third driving mechanism for driving the pad printing oil cup to move back and forth so as to uniformly coat the ink on the steel plate, the printing plate device comprises a steel plate bracket for fixing the steel plate, and the first driving mechanism and the third driving mechanism are connected with a controller. The machine further comprises a visual recognition device for recognizing products subjected to transfer printing machining, the visual recognition device is arranged on the workbench and located on one side of the machine frame, the visual recognition device is connected with the controller, and the visual recognition device comprises a camera. The automatic transfer printing device can be automatically debugged according to the transfer printing effect of products, manual debugging operation can be reduced, and the transfer printing effect is improved.

Description

Technical Field

[0001] The utility model relates to automatic pad printing equipment. Background Art

[0002] Pad printing equipment is a machine used to print on the surface of various products. It transfers ink from the printing plate to the product through a special printing head (pad head). This equipment is particularly suitable for printing on small areas, irregular surfaces or hard-to-reach areas, such as printing trademarks, graphics or text on electronic products, toys, glass products, etc. Pad printing equipment has the characteristics of easy operation, high efficiency and strong adaptability. With the development of technology, pad printing machines are moving towards automation to improve production efficiency and reduce costs.

[0003] Existing pad printing equipment is usually composed of a workbench, a printing plate device, an ink supply device, a printing device, a conveying device, a cleaning device and other devices. Among them, the printing plate device includes a steel plate and a steel plate bracket, and the steel plate is etched with graphics. The ink supply device is used to evenly apply ink on the printing plate. The printing device is used to transfer the ink on the steel plate to the product at the pad printing station. The conveying device is used to transport the product to the pad printing station and send the product out of the pad printing station after the pad printing is completed. The cleaning device is used to clean the rubber head during the printing process to improve the printing quality and the accuracy of overprinting.

[0004] The existing pad printing equipment will have the problem of pad printing position deviation after switching the pad printing steel plate and the type of product to be pad printed. The staff is required to observe the pad printing effect of the product by naked eyes to continuously debug the pad printing equipment. The operation is cumbersome and time-consuming, the work intensity is high, and certain experience and level of the staff are required. Summary of the invention

[0005] The utility model provides an automatic pad printing device which can be adjusted automatically according to the pad printing effect of the product.

[0006] The automatic pad printing device of the utility model comprises a workbench, a frame arranged on the workbench, a printing plate device, an ink supply device, a printing device, and a driving device are arranged on the frame, the printing plate device comprises a rubber head, a first driving mechanism driving the rubber head to move forward and backward, and a second driving mechanism driving the rubber head to move up and down, the ink supply device comprises a pad printing oil cup, and a third driving mechanism driving the pad printing oil cup to move forward and backward to evenly apply ink on a steel plate, the pad printing oil cup is driven by the third driving mechanism to slide along the surface of the steel plate, and when it moves in a direction toward the steel plate, the ink can be evenly applied to the surface of the steel plate, so that the ink is filled on the etched image and text, and when it moves away from the steel plate When the steel plate moves in the direction of the rotation, excess ink on the surface of the steel plate can be scraped off to improve the printing effect. The printing plate device includes a steel plate bracket for fixing the steel plate. The steel plate and the steel plate bracket form a detachable connection and can be disassembled and replaced by switching steel plates with different etched patterns as needed. The first driving mechanism, the second driving mechanism, and the third driving mechanism are connected to a controller. The controller controls the first driving mechanism and the second driving mechanism to drive the rubber head to transfer the ink on the steel plate to the product at the pad printing station. The controller controls the third driving mechanism to evenly coat the ink on the surface of the steel plate and scrape off excess ink at the same time.

[0007] The utility model also includes a visual recognition device for identifying products after pad printing. The visual recognition device is arranged on a workbench and located on one side of a frame. The visual recognition device is connected to a controller. The visual recognition device includes a camera. By using visual recognition technology, the product after pad printing is visually recognized through the camera, and the pad printing effect of the product can be judged. For example, when the pad printing position is offset in the front-to-back direction, the first driving mechanism can be controlled by the controller, so that the end point position of the rubber head along the front-to-back direction translational motion path can be adjusted to achieve deviation correction. For another example, when the image and text at the pad printing location of the product are darker or lighter, the second driving mechanism can be controlled by the controller, so that the lowest position when the rubber head is pressed down can be adjusted to achieve adjustment of the ink density of the pad printing image and text.

[0008] Furthermore, the steel plate support is slidably arranged on the frame, and the printing plate device further comprises a fourth driving mechanism for driving the steel plate support to slide left and right, and the fourth driving mechanism is connected to the controller. The visual recognition device recognizes the pad printing effect of the product, and when it is recognized that the pad printing position of the product is offset in the left and right directions, the controller can control the fourth driving mechanism to adjust the left and right displacement of the steel plate support and the steel plate, thereby realizing the deviation correction in the left and right directions.

[0009] Furthermore, a first sliding seat is provided at the lower end of the steel plate support, and a second sliding seat is provided on the frame. The first sliding seat and the second sliding seat are slidably connected through their guide rails and guide grooves, and the guiding movement of the first sliding seat and the second sliding seat is achieved through the sliding cooperation of the guide rails and the guide grooves. The fourth driving mechanism is fixed on the frame and connected to the first sliding seat. The fourth driving mechanism can drive the first sliding seat to slide relative to the second sliding seat. Since the steel plate support is arranged on the first sliding seat, it can also drive the steel plate support to slide left and right.

[0010] Furthermore, a cleaning device is provided on the frame, and the cleaning device is arranged on the path where the rubber head moves in the front-to-back direction. The cleaning device includes two tape installation shafts that are respectively rotatably arranged on both sides of the path where the rubber head moves in the front-to-back direction, and a support platform that is arranged between the two tape installation shafts, one of which is connected to a fifth driving mechanism for driving its rotation, one of which is used to configure a winding shaft for winding up the discarded tape, and the tape installation shaft is connected to the fifth driving mechanism, and the other tape installation shaft is used to configure a delivery shaft for delivering new tape, and the fifth driving mechanism is connected to a controller, and the controller controls the rotation of the winding shaft through the fifth driving mechanism so that the tape on the delivery shaft is transported to the winding shaft. By controlling the first driving mechanism, the second driving mechanism and the fifth driving mechanism through the controller, the rubber head can cooperate with the support platform and the tape to clean the excess ink on the rubber head after one or more transfers, and can also actively control the rubber head to be cleaned when the product pad printing image is not clear through cooperation with the visual recognition device.

[0011] Furthermore, the cleaning device includes a vertical support plate, which is fixed to the frame in cooperation. A recess is provided on the upper part of the support plate. The design of the recess can give way to the translational movement of the rubber head and is not easy to interfere with the rubber head. The support platform is composed of a plate extending laterally from the lower edge of the recess. The support platform is used to cooperate with the rubber head to press the tape onto the rubber head to improve the cleaning effect. The two tape installation shafts are respectively rotatably connected to the positions on both sides of the recess corresponding to the two ends of the support plate, so that the tape between the winding shaft and the feeding shaft on the two tape installation shafts can be arranged at the recess. The fifth driving mechanism is fixed at the end of the support plate, and the overall structure is simple and compact.

[0012] Furthermore, the visual recognition device includes a vertical bar, a first horizontal bar, and a second horizontal bar. The lower end of the vertical bar is provided with a base, which is connected and fixed with the workbench. One end of the first horizontal bar is connected to the vertical bar, and one end of the first horizontal bar can move and position along the vertical bar. One end of the second horizontal bar is connected to the first horizontal bar, and one end of the second horizontal bar can move and position along the first horizontal bar. The camera is connected to the other end of the second horizontal bar, and the camera can move and position along the second horizontal bar. The camera can adjust the longitudinal and lateral positions of the camera through the connection between the vertical bar, the first horizontal bar, the second horizontal bar, and the camera to improve the recognition effect of the camera.

[0013] Furthermore, the visual recognition device includes a third crossbar and a ring-shaped lighting lamp, one end of the third crossbar is connected to the vertical bar, one end of the third crossbar can move and position along the vertical bar, and the lighting lamp is connected to the third crossbar, and the lighting lamp can move and position along the third crossbar. The lighting lamp can play a role of uniform fill light, which can improve the visual recognition effect of the camera. The lighting lamp can adjust the longitudinal and lateral positions of the lighting lamp through the connection between the vertical bar, the third crossbar and the lighting lamp, so that the inner hole of the lighting lamp is aligned with the camera, thereby improving the fill light effect.

[0014] The beneficial effects of the utility model are as follows: the automatic pad printing equipment of the utility model utilizes visual recognition technology to identify the products after pad printing, and can debug the equipment automatically according to the pad printing effect of the products, which can reduce manual operation, lower the requirements for manual level, improve production efficiency, and can provide real-time feedback on pad printing effects, reduce unqualified products, and improve product pad printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0016] Figure 2 It is a top view of a part of an embodiment of the utility model;

[0017] Figure 3 A partial three-dimensional diagram of an embodiment of the utility model;

[0018] Figure 4 This is a structural diagram of a cleaning device according to an embodiment of the utility model;

[0019] Figure 5 This is an exploded view of a printing plate device according to an embodiment of the utility model;

[0020] Figure 6 This is a structural diagram of a visual device according to an embodiment of the utility model;

[0021] In the figure: 1. workbench; 2. frame; 31. rubber head; 32. first drive mechanism; 33. second drive mechanism; 41. pad printing oil cup; 42. third drive mechanism; 51. steel plate; 52. steel plate bracket; 53. fourth drive mechanism; 54. first sliding seat; 55. second sliding seat; 6. visual recognition device; 61. camera; 62. vertical bar; 63. first cross bar; 64. second cross bar; 65. third cross bar; 66. lighting lamp; 67. base; 7. cleaning device; 71. tape installation shaft; 72. support table; 73. fifth drive mechanism; 74. support plate; 741. notch. DETAILED DESCRIPTION

[0022] The embodiment of the automatic pad printing device of the utility model is as follows Figure 1-6 As shown, the machine comprises a workbench 1, a frame 2 arranged on the workbench 1, a printing plate device, an ink supply device, a printing device, and a driving device arranged on the frame 2, the printing plate device comprises a rubber head 31, a first driving mechanism 32 driving the rubber head 31 to move forward and backward, and a second driving mechanism 33 driving the rubber head 31 to move up and down, the ink supply device comprises a pad printing oil cup 41, and a third driving mechanism 42 driving the pad printing oil cup 41 to move forward and backward to evenly apply ink on the steel plate, the pad printing oil cup 41 is driven by the third driving mechanism 42 to slide along the surface of the steel plate 51, and when it moves toward the steel plate 51, it can evenly apply ink on the surface of the steel plate 51, so that the ink fills the etched image groove, and when it is driven by the third driving mechanism 42 to move away from the steel plate 51, the pad printing oil cup 41 can slide along ... When the plate 51 moves in the direction of rotation, excess ink on the surface of the steel plate 51 can be scraped off to improve the printing effect. The printing plate device includes a steel plate bracket 52 for fixing the steel plate 51. The steel plate 51 and the steel plate bracket 52 form a detachable connection. The steel plate 51 with different etched patterns can be disassembled and replaced as needed. The first driving mechanism 32, the second driving mechanism 33, and the third driving mechanism 42 are connected to a controller. The controller controls the first driving mechanism 32 and the second driving mechanism 33 to drive the rubber head 31 to transfer the ink on the steel plate 51 to the product of the pad printing station. The controller controls the third driving mechanism 42 to evenly coat the ink on the surface of the steel plate 51 and scrape off excess ink at the same time.

[0023] The utility model also includes a visual recognition device 6 for identifying the product after pad printing. Figure 1As shown, the visual recognition device 6 is arranged on the workbench 1 and is located on one side of the frame 2. When the utility model is actually applied, it is also necessary to cooperate with a conveying device, through which the product is conveyed to the pad printing station, and then conveyed to the visual recognition station of the visual recognition device 6 after the pad printing process is completed. The visual recognition device 6 is connected to the controller, and the visual recognition device 6 includes a camera 61. By using visual recognition technology, the product after pad printing is visually recognized by the camera 61, and the pad printing effect of the product can be judged. For example, when the pad printing position is offset in the front and rear directions, it can be detected by The first driving mechanism 32 is controlled by the controller, so that the end point position of the translational motion path of the rubber head 31 along the front-to-back direction corresponding to the pad printing station can be adjusted to achieve deviation correction. For example, when the image and text at the pad printing location of the product is darker or lighter, the second driving mechanism 33 can be controlled by the controller, so that the lowest position of the rubber head 31 when pressed down can be adjusted to adjust the ink density of the pad printed image and text. Generally speaking, when the rubber head 31 is pressed down to a greater extent, the ink printed on the product is usually relatively darker, and when the pressure is less, the ink printed on the product is usually relatively lighter.

[0024] The steel plate support 52 is slidably arranged on the frame 2, and the printing plate device further comprises a fourth driving mechanism 53 for driving the steel plate support 52 to slide left and right, and the fourth driving mechanism 53 is connected to the controller. The visual recognition device 6 recognizes the pad printing effect of the product, and when it is recognized that the pad printing position of the product is offset in the left and right directions, the controller can control the fourth driving mechanism 53 to adjust the left and right displacement of the steel plate support 52 and the steel plate 51, so as to realize the deviation correction in the left and right directions.

[0025] like Figure 5 As shown, a first sliding seat 54 is provided at the lower end of the steel plate bracket 52, and a second sliding seat 55 is provided on the frame 2. The first sliding seat 54 and the second sliding seat 55 are slidably connected through their guide rails and guide grooves, and the guiding movement of the first sliding seat 54 and the second sliding seat 55 is achieved through the sliding cooperation of the guide rails and the guide grooves. The fourth driving mechanism 53 is fixed on the frame 2 and connected to the first sliding seat 54. The fourth driving mechanism 53 can drive the first sliding seat 54 to slide relative to the second sliding seat 55. Since the steel plate bracket 52 is arranged on the first sliding seat 54, it can also drive the steel plate bracket 52 to slide left and right.

[0026] The frame 2 is provided with a cleaning device 7, which is arranged on the path where the rubber head 31 moves in the front-rear direction, and has a compact structure, which reduces the movement stroke of the rubber head 31. Figure 4As shown, the cleaning device 7 includes two tape installation shafts 71 which are rotatably arranged on both sides of the movement path of the adhesive head 31 along the front-back direction, and a support platform 72 which is arranged between the two tape installation shafts 71, one of the tape installation shafts 71 is connected to a fifth driving mechanism 73 for driving the rotation thereof, one of the tape installation shafts 71 is used to configure a winding shaft for winding up the discarded tape, the tape installation shaft 71 is connected to the fifth driving mechanism 73, and the other tape installation shaft 71 is used to configure a delivery shaft for delivering a new tape, the fifth driving mechanism 73 is connected to the controller, and the controller controls the rotation of the winding shaft through the fifth driving mechanism 73 so that the tape on the delivery shaft is transported to the winding shaft, and the controller controls the first driving mechanism 32, the second driving mechanism 33 and the fifth driving mechanism 73 to realize that the adhesive head 31 cooperates with the support platform 72 and the tape to clean the excess ink on the adhesive head 31 after one or more transfers, and can also cooperate with the visual recognition device 6 to actively control the adhesive head 31 to be cleaned when the product pad printing image is not clear.

[0027] The cleaning device 7 includes a vertical support plate 74, which is fixed to the frame 2. A recess 741 is provided on the upper portion of the support plate 74. The design of the recess 741 can give way to the translational movement of the rubber head 31 and is not easy to interfere with the rubber head 31. The support platform 72 is composed of a plate extending laterally from the lower edge of the recess 741. The support platform 72 is used to cooperate with the rubber head 31 to press the tape onto the rubber head 31 to improve the cleaning effect. The two tape mounting shafts 71 are respectively rotatably connected to the positions on both sides of the recess 741 at both ends of the support plate 74, so that the tape between the winding shaft and the feeding shaft on the two tape mounting shafts 71 can be arranged at the recess 741. The fifth driving mechanism 73 is fixed to the end of the support plate 74, and the overall structure is simple and compact.

[0028] In this embodiment, each driving mechanism adopts a servo motor and a screw transmission mechanism.

[0029] like Figure 6 As shown, the visual recognition device 6 includes a vertical rod 62, a first cross bar 63, a second cross bar 64, a third cross bar 65, and a lighting lamp 66. A base 67 is provided at the lower end of the vertical rod 62, and the base 67 is connected and fixed to the workbench 1. One end of the first cross bar 63 is connected to the vertical rod 62, and one end of the first cross bar 63 can move and position along the vertical rod 62. One end of the second cross bar 64 is connected to the first cross bar 63, and one end of the second cross bar 64 can move and position along the first cross bar 63. The camera 61 is connected to the other end of the second cross bar 64, and the camera 61 can move and position along the second cross bar 64. One end of the third cross bar 65 is connected to the vertical rod 62, and one end of the third cross bar 65 can move and position along the vertical rod 62. The lighting lamp 66 is connected to the third cross bar 65, and the lighting lamp 66 can move and position along the third cross bar 65. The lighting lamp 66 is a ring structure.

[0030] The above-mentioned "activity" includes relative rotation and sliding. The longitudinal height and lateral position of the camera 61 and the lighting lamp 66 can be adjusted through the connection between the camera 61, the vertical rod 62, the first horizontal rod 63, the second horizontal rod 64, the third horizontal rod 65, and the lighting lamp 66 to improve the visual recognition effect. When in use, the camera 61 is set in a position aligned with the inner hole of the lighting lamp 66, and the lighting lamp can play a role of fill light, and the fill light is relatively uniform.

[0031] The utility model relies on visual recognition technology, which is widely used in industrial production lines and is a relatively mature technology. Its general principle is: the product after pad printing is photographed and image recognition is performed through a camera 61, and compared with a standard image that meets the requirements and is pre-stored in a memory connected to a controller. When there is a difference between the recognized image and the pre-stored image, the driving mechanism of the pad printing device is controlled by the controller according to the specific difference, so as to achieve adjustment of the automatic pad printing device.

[0032] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An automatic pad printing device, comprising a workbench, a frame arranged on the workbench, a printing plate device, an ink supply device, a printing device, and a driving device arranged on the frame, the printing plate device comprising a pad head, a first driving mechanism for driving the pad head to move forward and backward, and a second driving mechanism for driving the pad head to move up and down, the ink supply device comprising a pad printing oil cup, and a third driving mechanism for driving the pad printing oil cup to move forward and backward to evenly apply ink on a steel plate, the printing plate device comprising a steel plate bracket for fixing the steel plate, the first driving mechanism, the second driving mechanism, and the third driving mechanism are connected to a controller, characterized in that: It also includes a visual recognition device for identifying products after pad printing. The visual recognition device is arranged on a workbench and located on one side of the frame. The visual recognition device is connected to a controller and includes a camera.

2. The automatic pad printing device according to claim 1, characterized in that: The steel plate support is slidably arranged on the frame, and the printing plate device also includes a fourth driving mechanism for driving the steel plate support to slide left and right, and the fourth driving mechanism is connected to the controller.

3. The automatic pad printing device according to claim 2, characterized in that: A first sliding seat is arranged at the lower end of the steel plate support, and a second sliding seat is arranged on the frame. The first sliding seat and the second sliding seat are slidably connected through their guide rails and guide grooves. The fourth driving mechanism is fixed on the frame and connected to the first sliding seat.

4. The automatic pad printing device according to claim 1, characterized in that: A cleaning device is arranged on the frame, and the cleaning device is arranged on the path where the adhesive head moves in the front-to-back direction. The cleaning device includes two tape installation shafts which are respectively rotatably arranged on both sides of the path where the adhesive head moves in the front-to-back direction, and a support platform which is arranged between the two tape installation shafts, wherein one of the tape installation shafts is connected to a fifth driving mechanism for driving the rotation thereof, and the fifth driving mechanism is connected to a controller.

5. The automatic pad printing device according to claim 4, characterized in that: The cleaning device includes a vertical support plate, which is fixed to the frame in cooperation, a notch is provided on the upper part of the support plate, and the support platform is composed of a plate extending laterally from the lower edge of the notch, and two tape mounting shafts are rotatably connected to positions at both ends of the support plate corresponding to the two sides of the notch, and the fifth driving mechanism is fixed to the end of the support plate.

6. The automatic pad printing device according to claim 1, characterized in that: The visual recognition device includes a vertical rod, a first cross rod, and a second cross rod. A base is provided at the lower end of the vertical rod, and the base is connected and fixed to the workbench. One end of the first cross rod is connected to the vertical rod, and one end of the first cross rod can move and position along the vertical rod. One end of the second cross rod is connected to the first cross rod, and one end of the second cross rod can move and position along the first cross rod. A camera is connected to the other end of the second cross rod, and the camera can move and position along the second cross rod.

7. The automatic pad printing device according to claim 5, characterized in that: The visual recognition device includes a third crossbar and a ring-shaped lighting lamp. One end of the third crossbar is connected to the vertical rod, and one end of the third crossbar can move and position along the vertical rod. The lighting lamp is connected to the third crossbar and can move and position along the third crossbar.

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