A cambered surface printing press

Abstract

The application discloses a dome printing machine and relates to the technical field of printing equipment. The dome printing machine comprises a rack, a rotating positioning mechanism for defining and rotating a tank body is installed on the rack, and a circumferential outer wall printing mechanism and a circumferential inner wall printing mechanism are further installed on the rack. The circumferential outer wall printing mechanism comprises a first driving assembly and a second driving assembly which are installed on the rack, a plane screen assembly is installed on the first driving assembly, a first stamping assembly and a first ink jetting assembly for jetting ink to the plane screen assembly are installed on the second driving assembly, the first driving assembly is used for driving the plane screen assembly to press against the tank body and move, and the second driving assembly is used for driving the first stamping assembly to move, so that the plane screen assembly is pressed against the tank body and ink is transferred to the circumferential outer wall of the tank body along with the movement of the plane screen assembly. The application can facilitate printing on the circumferential outer wall and the circumferential inner wall of the tank body.

Description

Technical Field

[0001] This application relates to the technical field of printing equipment, and in particular to a curved surface printing machine. Background Technology

[0002] Screen printing technology is an important means of information dissemination and graphic reproduction in contemporary society, playing a crucial role in the development of human society. With the increasing diversification of needs across various industries, printing technology is constantly innovating. While existing printing technologies have relatively mature equipment and processes for printing on conventional flat surfaces, printing on objects with special shapes, such as cans, presents numerous challenges. Current printing presses are generally suitable for flat printing and are not ideal for printing on curved surfaces, such as the inner and outer circumferences of cans. This severely limits the application of printing technology in the production of certain special products, such as cylindrical packaging containers and internal pipe markings. Summary of the Invention

[0003] To facilitate printing on the outer and inner circumferential walls of the can, this application provides a curved surface printing machine.

[0004] The curved surface printing machine provided in this application adopts the following technical solution:

[0005] A curved surface printing machine includes a frame, the frame being equipped with a rotation positioning mechanism for defining and rotating a can, and the frame also being equipped with a circumferential outer wall printing mechanism and a circumferential inner wall printing mechanism.

[0006] The circumferential outer wall printing mechanism includes a first drive assembly and a second drive assembly mounted on a frame. A flat screen assembly is mounted on the first drive assembly, and a first impression assembly and a first inkjet assembly for spraying ink onto the flat screen assembly are mounted on the second drive assembly. The first drive assembly is used to drive the flat screen assembly to press against the can body and move. The second drive assembly is used to drive the first impression assembly to move, press the flat screen assembly onto the can body, and transfer ink onto the circumferential outer wall of the can body as the flat screen assembly moves.

[0007] The circumferential inner wall printing mechanism includes a third drive assembly mounted on a frame. A connecting frame is mounted on the third drive assembly, and an annular screen assembly is slidably connected to the connecting frame. The connecting frame and the annular screen assembly are connected to an elastic component that allows the annular screen assembly to return to its original position after sliding. A second imprinting assembly and a second inkjet assembly for spraying ink onto the annular screen assembly are also mounted on the connecting frame. The third drive assembly is configured to drive the annular screen assembly to press against the inner wall of the tank, thereby causing the annular screen assembly to move and contact the second imprinting assembly to transfer ink onto the circumferential inner wall of the tank.

[0008] By adopting the above technical solution, the can is placed on the rotary positioning mechanism. Then, by driving the first driving component, the flat screen assembly is moved above the can and contacts the outer wall of the can. At the same time, the second driving component is driven to drive the first imprinting component to press on the flat screen assembly. After the first inkjet component sprays ink onto the flat screen assembly, driving the first driving component to move the flat screen assembly, in conjunction with the rotary positioning mechanism to rotate the can, transfers the ink to the outer circumference of the can. In addition, driving the third driving component can drive the annular screen assembly to extend into the can. At this time, under the action of the elastic component, the third driving component can press the annular screen assembly against the inner wall of the can. The second imprinting component will contact the annular screen assembly. As the can rotates, the second imprinting component transfers the ink to the inner circumference of the can.

[0009] Preferably, the rotary positioning mechanism includes a first driving member mounted on a frame, the first driving member being connected to a plate, the plate being rotatably connected to a positioning wheel one and a positioning wheel two, a driving member and a second driving member being mounted on the plate, the driving member being connected to the positioning wheel one, the second driving member being rotatably connected to the positioning wheel three, a placement area for placing a can being formed between the positioning wheel one, the positioning wheel two and the positioning wheel three, and the second driving member being able to drive the positioning wheel three to move to confine the can within the placement area.

[0010] By adopting the above technical solution, after the tank is placed in the placement area, the second driving component can drive the positioning wheel three to move so that the tank is pressed against the positioning wheel one and the positioning wheel two, and the driving component can drive the tank to rotate.

[0011] Preferably, the frame is further equipped with a feeding mechanism, which includes a robotic arm mounted on the frame and a clamping component mounted on the robotic arm; the frame is provided with a flow channel for transferring the tank.

[0012] By adopting the above technical solution, a robotic arm can be used to move the clamping components to clamp and place the can in the flow channel within the placement area.

[0013] Preferably, the first imprinting assembly includes a mounting bracket connected to the second drive assembly, on which an imprinting plate is detachably mounted. The imprinting plate has a tapered portion at its end near the planar screen assembly, and the imprinting plate is inclined.

[0014] Preferably, the first inkjet assembly includes a storage tank mounted on a frame for storing ink, an inkjet head mounted on the connecting frame, and a flexible telescopic tube connected to the inkjet head and the storage tank. The flexible telescopic tube is connected to a pressure pump and a regulating valve.

[0015] By adopting the above technical solution, the ink in the storage tank can be controlled to flow to the inkjet head for ejection using a pressure pump and regulating valve.

[0016] Preferably, the elastic component includes a guide post connected to the connecting frame, the annular wire mesh assembly having a guide hole, and the guide post slidably connected to the guide hole; the guide post is connected to a return spring, and the return spring is also connected to the annular wire mesh assembly; the second embossing component includes a mounting rod assembly connected to the connecting frame, a scraper connected to the mounting rod assembly, and the scraper being set in the same direction as the axis of the wire mesh ring.

[0017] By adopting the above technical solution, the third driving component can drive the annular screen assembly to move and press against the inner wall of the tank and then contact the second imprinting component. In conjunction with the inkjet component spraying ink onto the annular screen assembly and the rotation of the tank, the second imprinting component transfers the ink onto the inner circumference of the tank.

[0018] Preferably, the planar wire mesh assembly includes a frame connected to the first drive assembly, the frame having a wire mesh plate snapped into it, and a locking element for locking the wire mesh plate is also installed on the frame.

[0019] By adopting the above technical solution, after the locking parts are released, the wire mesh can be disassembled and replaced with other types of wire mesh.

[0020] Preferably, the frame has a connecting hole, the locking member is threaded into the connecting hole, and the locking member can rotate and move to press and lock the wire mesh plate.

[0021] By adopting the above technical solution, rotating the locking component can press or release the pressure on the wire mesh plate.

[0022] In summary, the present invention has at least one of the following beneficial technical effects:

[0023] 1. The device can place the canister on a rotary positioning mechanism, and then drive the first drive assembly to move the flat screen assembly above the canister and into contact with the outer wall of the canister. At the same time, drive the second drive assembly to move the first imprinting assembly to press it onto the flat screen assembly. After the first inkjet assembly sprays ink onto the flat screen assembly, drive the first drive assembly to move the flat screen assembly and, in conjunction with the rotary positioning mechanism, drive the canister to rotate, thus transferring the ink onto the outer circumference of the canister. In addition, drive the third drive assembly to move the annular screen assembly into the canister. At this time, under the action of the elastic component, the third drive assembly can press the annular screen assembly against the inner wall of the canister. The second imprinting assembly will contact the annular screen assembly. As the canister rotates, the second imprinting assembly transfers the ink onto the inner circumference of the canister.

[0024] 2. Rotating the locking mechanism will release the pressure on the wire mesh, allowing you to replace it with another type of wire mesh. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a curved surface printing machine according to an embodiment of this application;

[0026] Figure 2 This is a structural diagram illustrating the printing mechanism on the outer wall of the circle;

[0027] Figure 3 This is a structural diagram illustrating the rotary positioning mechanism;

[0028] Figure 4 This is a structural schematic diagram used to illustrate a planar wire mesh assembly;

[0029] Figure 5 yes Figure 1 Enlarged view of section A;

[0030] Figure 6 This is a structural diagram illustrating the ring-shaped wire mesh assembly.

[0031] In the attached diagram, the following components are labeled: 1. Frame; 11. Flow channel; 2. Rotary positioning mechanism; 21. First driving component; 22. Plate; 23. Positioning wheel one; 24. Positioning wheel two; 25. Driving component; 26. Second driving component; 27. Positioning wheel three; 28. Placement area; 3. Feeding mechanism; 31. Robotic arm; 32. Clamping component; 4. Circumferential outer wall printing mechanism; 41. First driving assembly; 411. First horizontal driving component; 412. First vertical driving component; 42. Second driving assembly; 421. Second horizontal driving component; 422. Second vertical driving component; 43. Planar screen assembly; 431. Frame; 4311. Connecting hole; 4312. Locking component; 432. Screen plate; 44. First imprinting assembly; 4 41. Mounting bracket; 442. Imprint plate; 4421. Cone; 45. First inkjet assembly; 451. Storage tank; 452. Inkjet head; 453. Flexible telescopic tube; 5. Circumferential inner wall printing mechanism; 51. Third drive assembly; 511. Third horizontal drive component; 512. Third vertical drive component; 52. Connecting frame; 53. Annular screen assembly; 531. Linkage component; 5311. Guide hole; 532. Circular plate; 5321. Groove; 533. Screen ring; 54. Second imprint assembly; 541. Mounting rod assembly; 542. Squeegee; 55. Second inkjet assembly; 551. Flexible telescopic tube; 552. Ink nozzle; 56. Elastic component; 561. Guide post; 562. Return spring. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0034] This application discloses a curved surface printing machine. It is used to print on the inner and outer circumferential walls of a can.

[0035] Reference Figure 1 A curved surface printing machine includes a frame 1, on which a flow channel 11 for transferring cans is provided. The cans manufactured in the previous process flow in the flow channel 11 to the next process. The frame 1 is equipped with a rotation positioning mechanism 2 for limiting and rotating the cans and a feeding mechanism 3 for feeding materials. The frame 1 is also equipped with a circumferential outer wall printing mechanism 4 and a circumferential inner wall printing mechanism 5.

[0036] The feeding mechanism 3 picks up the can in the flow channel 11 and places it in the rotary positioning mechanism 2. The rotary positioning mechanism 2 fixes the can and drives the can to rotate. Then, the outer circumferential printing mechanism 4 is driven to print on the outer circumferential wall of the can, and the inner circumferential printing mechanism 5 is driven to print on the inner circumferential wall of the can.

[0037] Reference Figure 1 and Figure 2 The rotary positioning mechanism 2 includes a first driving member 21 mounted on the frame 1. The first driving member 21 is a cylinder, and a plate 22 is connected to the first driving member 21. The first driving member can drive the plate 22 to move up and down. Figure 3 The plate 22 is rotatably connected to positioning wheel 1 23 and positioning wheel 24. The plate 22 is also equipped with a drive component 25 and a second drive component 26. The drive component 25 is a motor and the second drive component 26 is a cylinder. The drive component 25 is connected to positioning wheel 1 23 and can drive positioning wheel 1 23 to rotate. The second drive component 26 is rotatably connected to positioning wheel 3 27 and can drive positioning wheel 3 27 to move up and down. A placement area 28 for placing the tank is formed between positioning wheel 1 23, positioning wheel 24 and positioning wheel 3 27.

[0038] The robot arm 31 and the clamping member 32 are used to place the can in the placement area 28 and ensure that the opening of the can is facing right. The second driving member 26 is driven to move the positioning wheel 27 upward to confine the can within the placement area 28. The positioning wheel 23, the positioning wheel 24 and the positioning wheel 27 fix the can for three-point positioning.

[0039] Reference Figure 1The feeding mechanism 3 includes a robot arm 31 mounted on the frame 1, and a clamping component 32 is mounted on the robot arm 31. The clamping component 32 is a clamping cylinder.

[0040] The drive robot 31 can move the gripper 32 to clamp the can in the flow channel 11 and place it in the placement area 28.

[0041] Reference Figure 2 The circumferential outer wall printing mechanism 4 includes a first drive assembly 41 and a second drive assembly 42 mounted on the frame 1. A flat screen assembly 43 is mounted on the first drive assembly 41, and a first impression assembly 44 and a first inkjet assembly 45 for spraying ink onto the flat screen assembly 43 are mounted on the second drive assembly 42. The first drive assembly 41 is used to drive the flat screen assembly 43 to press against the can body and move. The second drive assembly 42 is used to drive the first impression assembly 44 to move, press the flat screen assembly 43 onto the can body, and transfer ink onto the circumferential outer wall of the can body as the flat screen assembly 43 moves.

[0042] Reference Figure 2 Specifically, the first drive assembly 41 includes a first horizontal drive member 411 and a first vertical drive member 412. The first vertical drive member 412 is mounted on the frame 1. The first horizontal drive member 411 is connected to the first vertical drive member 412. Both the first horizontal drive member 411 and the first vertical drive member 412 are cylinders. The flat wire mesh assembly 43 is mounted on the first horizontal drive member 411.

[0043] Reference Figure 2 and Figure 4 The planar screen printing assembly 43 includes a frame 431 connected to the first transverse drive member 411. A screen printing plate 432 is snapped onto the frame 431. When ink is present on the upper end of the screen printing plate 432, the pattern on the screen printing plate 432 can be transferred to the product by scraping and pressing the screen printing plate 432. The specific structure of the screen printing plate 432 is existing technology and will not be described in detail here. A locking member 4312 for locking the screen printing plate 432 is also installed on the frame 431. Specifically, a connecting hole 4311 is opened on the frame 431, and the locking member 4312 is threaded into the connecting hole 4311. The locking member 4312 can rotate and move to press and lock the screen printing plate 432. After rotating the locking member 4312 to move it upwards, the screen printing plate 432 can be directly pulled out to the right.

[0044] Reference Figure 2 The second drive assembly 42 includes a second horizontal drive member 421 mounted on the frame 1 and a second vertical drive member 422 mounted on the second horizontal drive member 421. Both the second horizontal drive member 421 and the second vertical drive member 422 are cylinders. The first imprinting assembly 44 and the first inkjet assembly 45 are both mounted on the second vertical drive member 422.

[0045] Reference Figure 2 The first imprinting assembly 44 includes a mounting bracket 441 connected to the second vertical drive member 422. An imprinting plate 442 is mounted on the mounting bracket 441 by screws. The lower end of the imprinting plate 442 has a tapered portion 4421, and the imprinting plate 442 is tilted to the left. The first inkjet assembly 45 includes a storage tank 451 mounted on the frame 1 for storing ink. An inkjet head 452 is mounted on the connecting bracket 52. The inkjet head 452 is located to the left of the imprinting plate 442. The inkjet head 452 and the storage tank 451 are connected together to a flexible telescopic tube 453. The flexible telescopic tube 453 is connected to a pressure pump and a regulating valve.

[0046] Reference Figure 5 and Figure 6 The circumferential inner wall printing mechanism 5 includes a third drive assembly 51 mounted on the frame 1. A connecting frame 52 is mounted on the third drive assembly 51. An annular screen assembly 53 is slidably connected to the connecting frame 52. The connecting frame 52 and the annular screen assembly 53 are connected together by an elastic component 56 that enables the annular screen assembly 53 to return to its original position after sliding. A second imprinting assembly 54 and a second inkjet assembly 55 for spraying ink onto the annular screen assembly 53 are also mounted on the connecting frame 52. The third drive assembly 51 is configured to drive the annular screen assembly 53 to press against the inner wall of the tank, thereby causing the annular screen assembly 53 to move and contact the second imprinting assembly 54 to transfer ink onto the circumferential inner wall of the tank.

[0047] Reference Figure 4 and Figure 5 The third drive assembly 51 includes a third lateral drive member 511, on which a third vertical drive member 512 is mounted. Both the third lateral drive member 511 and the third vertical drive member 512 are cylinders. A connecting frame 52 is connected to the third vertical drive member 512. The elastic assembly 56 includes a guide post 561, which is vertically arranged and connected to the connecting frame 52. The annular wire mesh assembly 53 has a guide hole 5311, and the guide post 561 is slidably connected to the guide hole 5311, allowing the annular wire mesh assembly 53 to move slightly up and down. A return spring 562 is connected to the guide post 561, and the lower end of the return spring 562 is connected to the annular wire mesh assembly 53.

[0048] Reference Figure 5 The annular screen assembly 53 includes a linkage 531, a guide hole 5311 on the linkage 531, a circular plate 532 rotatably connected to the linkage 531, and a screen ring 533 fixedly connected to the circular plate 532. The left end of the screen ring 533 has a constriction to prevent ink from flowing out. The circular plate 532 can rotate synchronously with the screen ring 533. When there is ink on the inner wall of the screen ring 533, the pattern on the screen ring 533 can be transferred to the product by scraping and pressing the screen ring 533.

[0049] Reference Figure 5and Figure 6 The second printing assembly 54 includes a serpentine mounting rod assembly 541 connected to a connecting frame 52. The mounting rod assembly 541 extends into the screen ring 533 and is connected to a scraper 542. The circular plate 532 has a slot 5321 for the mounting rod assembly 541 to move slightly relative to the screen ring 533. The scraper 542 is oriented in the same direction as the axis of the screen ring 533. The second inkjet assembly 55 includes a flexible telescopic tube 551 connected to a storage tank 451. The flexible telescopic tube 551 extends into the screen ring 533 and is connected to an ink nozzle 552. The ink nozzle 552 is fixed to the mounting rod assembly 541 and is located inside the screen ring 533 and on one side of the scraper 542. The flexible telescopic tube 551 is also equipped with a pressure pump and a regulating valve.

[0050] In this application, the printing on the outer circumference of the can and the printing on the inner circumference of the can can be performed simultaneously.

[0051] The implementation principle of a curved surface printing machine in this application embodiment is as follows:

[0052] The driving robot 31 and the clamping member 32 clamp the can in the flow channel 11 and place it in the placement area 28 with the can opening facing right. The driving second driving member 26 drives the positioning wheel 27 to move upward to limit the can in the placement area 28. The positioning wheel 23, positioning wheel 24 and positioning wheel 27 fix the can for three-point positioning.

[0053] The first vertical drive member 412 drives the screen plate 432 to move down and contact the outer wall of the tank. The second horizontal drive member 421 and the second vertical drive member 422 drive the imprint plate 442 to move and press against the upper end of the screen plate 432. At the same time, the pressure pump and the regulating valve are used to spray the ink in the storage tank 451 from the inkjet head 452 to the upper end of the screen plate 432. Then, the first horizontal drive member 411 drives the screen plate 432 to move laterally and cooperates with the drive drive member 25 to drive the positioning wheel 23 to rotate so as to drive the tank to rotate. The pattern on the screen plate 432 will be transferred to the outer wall of the tank.

[0054] The third horizontal drive member 511 and the third vertical drive member 512 drive the screen ring 533 into the can body. Then, the third vertical drive member 512 is driven alone to move the screen ring 533 downward to abut against the inner wall of the can body. The screen ring 533 will move upward, the return spring 562 will be compressed, and the scraper 542 will press on the screen ring 533. At this time, in conjunction with the rotation of the can body, the follow-up movement of the screen ring 533, and the ink spraying of ink from the ink nozzle 552 onto the inner wall of the screen ring 533, the scraper 542 will transfer the pattern on the screen ring 533 to the inner wall of the can body.

[0055] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A curved surface printing machine, characterized in that: Includes a frame (1), the frame (1) is equipped with a rotation positioning mechanism (2) for defining and rotating the tank, and the frame (1) is also equipped with a circumferential outer wall printing mechanism (4) and a circumferential inner wall printing mechanism (5); The circumferential outer wall printing mechanism (4) includes a first drive assembly (41) and a second drive assembly (42) mounted on a frame (1). A flat screen assembly (43) is mounted on the first drive assembly (41), and a first impression assembly (44) and a first inkjet assembly (45) for spraying ink onto the flat screen assembly (43) are mounted on the second drive assembly (42). The first drive assembly (41) is used to drive the flat screen assembly (43) to press against the can body and move. The second drive assembly (42) is used to drive the first impression assembly (44) to move and press the flat screen assembly (43) onto the can body and transfer ink onto the circumferential outer wall of the can body as the flat screen assembly (43) moves. The circumferential inner wall printing mechanism (5) includes a third drive assembly (51) mounted on a frame (1). A connecting frame (52) is mounted on the third drive assembly (51). An annular screen assembly (53) is slidably connected to the connecting frame (52). The connecting frame (52) and the annular screen assembly (53) are connected together by an elastic component (56) that enables the annular screen assembly (53) to return to its original position after sliding. A second imprinting assembly (54) and a second inkjet assembly (55) for spraying ink onto the annular screen assembly (53) are also mounted on the connecting frame (52). The third drive assembly (51) is configured to drive the annular screen assembly (53) to press against the inner wall of the tank, thereby causing the annular screen assembly (53) to move and contact the second imprinting assembly (54) to transfer ink onto the circumferential inner wall of the tank.

2. The curved surface printing machine according to claim 1, characterized in that: The rotary positioning mechanism (2) includes a first driving member (21) mounted on a frame (1). The first driving member (21) is connected to a plate (22). The plate (22) is rotatably connected to a positioning wheel one (23) and a positioning wheel two (24). The plate (22) is also equipped with a driving member (25) and a second driving member (26). The driving member (25) is connected to the positioning wheel one (23). The second driving member (26) is rotatably connected to the positioning wheel three (27). A placement area (28) for placing a can is formed between the positioning wheel one (23), the positioning wheel two (24) and the positioning wheel three (27). The second driving member (26) can drive the positioning wheel three (27) to move so as to confine the can within the placement area (28).

3. The curved surface printing machine according to claim 2, characterized in that: The frame (1) is also equipped with a feeding mechanism (3), which includes a robot arm (31) mounted on the frame (1) and a clamping component (32) mounted on the robot arm (31); the frame (1) is provided with a flow channel (11) for transferring the tank.

4. The curved surface printing machine according to claim 1, characterized in that: The first embossing assembly (44) includes a mounting bracket (441) connected to the second drive assembly (42), on which an embossing plate (442) is detachably mounted. The embossing plate (442) has a tapered portion (4421) at the end near the flat screen assembly (43), and the embossing plate (442) is inclined.

5. A curved surface printing machine according to claim 4, characterized in that: The first inkjet assembly (45) includes a storage tank (451) mounted on a frame (1) for storing ink. An inkjet head (452) is mounted on the connecting frame (52). The inkjet head (452) and the storage tank (451) are connected together by a flexible telescopic tube (453). The flexible telescopic tube (453) is connected to a pressure pump and a regulating valve.

6. A curved surface printing machine according to claim 1, characterized in that: The elastic component (56) includes a guide post (561) connected to the connecting frame (52). The annular wire mesh assembly (53) has a guide hole (5311), and the guide post (561) is slidably connected to the guide hole (5311). The guide post (561) is connected to a return spring (562), which is also connected to the annular wire mesh assembly (53). The second embossing component (54) includes a mounting rod assembly (541) connected to the connecting frame (52). A scraper (542) is connected to the mounting rod assembly (541), and the scraper (542) is set in the same direction as the axis of the wire mesh ring (533).

7. A curved surface printing machine according to claim 1, characterized in that: The planar wire mesh assembly (43) includes a frame (431) connected to the first drive assembly (41), the frame (431) being snapped with a wire mesh plate (432), and a locking member (4312) for locking the wire mesh plate (432) is also installed on the frame (431).

8. A curved surface printing machine according to claim 7, characterized in that: The frame (431) has a connecting hole (4311), and the locking member (4312) is threaded to the connecting hole (4311). The locking member (4312) can rotate and move to press and lock the wire mesh plate (432).

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