Printing apparatus

Abstract

The invention relates to the technical field of printing, and provides a printing device which comprises a jet printing assembly. The transfer printing unit comprises a transfer printing piece and a pressure adjusting unit, the transfer printing piece is suitable for being in a to-be-printed state under the action of the pressure adjusting unit, and the transfer printing piece in the to-be-printed state is suitable for bearing spraying of the spray printing assembly; the first driving assembly is connected with the transfer printing unit, and the first driving assembly is in communication connection with the jet printing assembly; the printing assembly and the jet printing assembly are arranged in a spaced mode, the printing assembly comprises a transfer printing head and a bearing set position, and the bearing set position at least comprises a first bearing key position and a second bearing key position; the second driving assembly is connected with the printing assembly and suitable for driving the transfer printing head and the bearing assembly to move so that the sprayed transfer printing piece can make contact with the to-be-printed part of the printing stock, and the first driving assembly is in communication connection with the second driving assembly, so that the automation level of transfer printing is guaranteed, the production difficulty and the debugging difficulty are reduced, and the production efficiency is improved. And two sets of equipment are not needed, so that the cost is low.

Description

Technical Field

[0001] This invention relates to the field of printing technology, and more specifically to a printing apparatus. Background Technology

[0002] Currently, for everyday ceramic items such as cups and bowls, the main printing techniques include hand-painting, water transfer printing, and pad printing. Hand-painting is difficult and costly, and is only suitable for customized or small-batch production. Water transfer printing requires the preparation of decals and manual application, making the process complex and difficult to automate. Pad printing is currently the primary technique for producing patterns on everyday ceramics.

[0003] In automated production, pad printing typically involves using a laser engraving machine to carve the desired pattern onto a stainless steel printing plate to create an intaglio plate. Then, a pad printing silicone head is made and installed onto the printing plate in the pad printing equipment. Ink is used to fill the pattern, and the pad printing silicone head transfers the pattern directly onto the ceramic substrate to complete the production process.

[0004] However, in pad printing, when printing is required on different locations on ceramics, a single pad printing device is difficult to apply. It is necessary to adjust multiple components on the device, such as the printing plate, and to conduct joint debugging, which takes a long time. In addition, the cost of adding new equipment is high. Summary of the Invention

[0005] In view of this, the present invention provides a printing apparatus to solve the problems of high cost, difficulty and time consumption in the prior art of pad printing equipment for printing on different positions of ceramics separately.

[0006] In a first aspect, the present invention provides a printing apparatus, comprising: a printing assembly; a pad printing unit including a pad printing element and a pressure regulating unit, the pad printing element being adapted to be in a printing-ready state under the action of the pressure regulating unit, the pad printing element in the printing-ready state being adapted to receive spraying from the printing assembly; a first driving assembly connected to the pad printing unit, adapted to drive the pad printing element to move relative to the printing assembly, the first driving assembly being communicatively connected to the printing assembly; a substrate assembly spaced apart from the printing assembly, including a pad printing head and a substrate support assembly, the substrate support assembly including at least a first substrate support position and a second substrate support position, adapted to respectively support a substrate and expose printing-ready portions at different positions; a second driving assembly connected to the substrate assembly, adapted to drive the pad printing head and the substrate support assembly to move, so that the sprayed pad printing element contacts the printing-ready portion of the substrate, the first driving assembly being communicatively connected to the second driving assembly.

[0007] Beneficial effects:

[0008] The printing assembly features different carrier positions on its carrier keys, allowing different areas of the substrate to be printed to be exposed when the substrate is positioned to be printed. The pad printing unit, receiving ink from the inkjet printing assembly, uses the transfer head and second drive assembly to contact the substrate on the corresponding carrier key, enabling the transfer of ink to different areas of the substrate. Simultaneously, because the pad printing unit moves relative to the inkjet printing assembly under the drive of the first drive assembly, it can repeatedly receive ink. In conjunction with the various drive assemblies, the pad printing unit can continue transferring ink to the next carrier key after completing the transfer of ink to the substrate on a single carrier key, ensuring a high level of automation in the pad printing process, reducing production and debugging difficulties, minimizing time consumption, eliminating the need for two sets of equipment, and lowering costs.

[0009] In one optional embodiment, the pad printing component includes: a pad printing body; a flipping drive, hinged to the pad printing body, adapted to drive the pad printing body to flip and adjust the pad printing surface of the pad printing body to a preset direction; a support, connected to the first drive assembly, adapted to support the pad printing body, the flipping drive, and the pressure regulating unit, and adapted to move relative to the inkjet printing assembly under the action of the first drive assembly; the pad printing body is adapted to move to the printing position under the drive of the support and the action of the flipping drive, and to move towards the printing substrate until they come into contact under the action of the second drive assembly.

[0010] In one optional embodiment, the pressure regulating unit includes: a first adsorption shell disposed between the support and the pad printing body, adapted to adsorb the pad printing body accordingly, wherein the first adsorption shell has a plurality of adsorption holes on the side facing the pad printing body; and a first pressure regulating drive unit communicating with the first adsorption shell and communicating with the printing assembly, wherein the first pressure regulating drive unit is adapted to adjust the pressure inside the first adsorption shell so that the pad printing body is in a flat, ready-to-print state.

[0011] In one optional embodiment, the first driving component includes a first guide portion and a first driving member. The first guide portion is movably connected to the pad printing component and extends toward the printing assembly. The printing trajectory of the inkjet printing assembly points toward the first guide portion. The first driving member is communicatively connected to the pad printing component, the pressure regulating unit, and the inkjet printing assembly, and is adapted to drive the pad printing component to move along the first guide portion.

[0012] In one optional embodiment, the bearing assembly includes: a movable support platform having a plurality of first bearing keys and a plurality of second bearing keys, wherein the first bearing keys are adapted to bear the substrate and expose the protruding part to be printed, and the second bearing keys are adapted to bear the substrate and expose its concave part to be printed; and an auxiliary driving member connected to the movable support platform to drive the movable support platform to rotate along a preset rotation direction, wherein the first bearing keys and the second bearing keys are staggered along the preset rotation direction.

[0013] In one optional embodiment, the printing apparatus further includes: a plurality of bearing holes correspondingly disposed on the movable support platform and distributed correspondingly to the first bearing key, adapted to allow the second driving component to pass through, wherein the first bearing key is adapted to move toward or away from the coated pad under the action of the second driving component.

[0014] In an optional embodiment, the printing apparatus further includes: a plurality of bearing holes correspondingly disposed on the movable support platform and distributed at least corresponding to the first bearing key; a plurality of bearing rods passing through the bearing holes, one end connected to the first bearing key, and the other end provided with a receiving plate, adapted to be detachably connected to the second driving assembly, and adapted to move towards or away from the coated pad under the action of the second driving assembly. A guide sleeve correspondingly disposed on the bearing holes, limited and connected to the outer peripheral side of the bearing holes, adapted to allow the bearing rods to pass through, and guide the bearing rods.

[0015] In one optional embodiment, the second driving assembly includes: a first driving component, comprising a second guide portion and a second driving member, the second guide portion being disposed toward the printing position direction of the pad printing body and movably connected to the pad printing head, the second driving member being communicatively connected to the first driving assembly and cooperating with the pad printing head, adapted to drive the pad printing head to move directionally along the second guide portion; and a second driving component, comprising a third guide portion and a third driving member, the third guide portion extending toward the movable support and parallel to the second guide portion, a driving rod being movably connected thereto, the driving rod being adapted to move along the third guide portion under the action of the third driving member, and correspondingly driving the first bearing key to move toward the printing position direction of the pad printing body.

[0016] In one optional embodiment, the second drive component further includes a limiting part and a limiting adjustment part. The limiting part is disposed at one end of the drive rod facing the bearing assembly. The limiting part is adapted to be limitedly connected to or separated from the bearing plate of the bearing rod under the action of the limiting adjustment part.

[0017] In one optional embodiment, the printing apparatus further includes: a first support platform, which correspondingly supports the pad printing unit and the first driving component, and the inkjet printing component is correspondingly disposed on the upper side of the first support platform; and a second support platform, which is spaced apart from the second support platform and on which the printing component and the second driving component are disposed. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of a printing apparatus according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 The diagram shows the internal structure of the printing apparatus after the pad printing workpiece has been coated and moved to the printing position.

[0021] Figure 3 for Figure 1 The diagram shows the internal structure of the printing apparatus when the printing plate comes into contact with the printing head.

[0022] Figure 4 for Figure 3 A schematic diagram of the internal structure of the printing apparatus from another angle;

[0023] Figure 5 for Figure 1 A partial structural schematic diagram of the pad printing unit and the first drive assembly of the printing apparatus shown;

[0024] Figure 6 for Figure 1 The diagram shown is a simplified structural diagram of the printing apparatus.

[0025] Figure 7 for Figure 1 The diagram shows the state changes of the pad printing subject.

[0026] Figure 8 for Figure 1 A schematic diagram of the process of transferring the printing material onto the first carrier key of the printing apparatus shown.

[0027] Figure 9 for Figure 1 A schematic diagram of the process of transferring the printing substrate onto the second carrier key of the printing apparatus shown.

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

[0029] 1. Printing assembly; 2. Pad printing component; 21. Pad printing body; 211. Elastic printing substrate; 212. Limiting frame; 22. Flipping drive; 23. Support platform; 3. Pressure regulating unit; 31. First suction shell; 32. First pressure regulating drive; 4. First drive assembly; 41. First guide; 42. First drive; 5. Pad printing head; 6. Bearing assembly; 61. First bearing key; 62. Second bearing key; 63. Movable support platform; 64. Auxiliary drive; 65. Bearing hole; 66. Bearing rod; 67. Guide sleeve; 7. Second drive assembly; 71. First drive component; 711. Second guide; 712. Second drive; 72. Second drive component; 721. Third guide; 722. Third drive; 73. Limiting part; 74. Limiting adjustment part; 75. Drive rod; 8. First support platform; 9. Second support platform; 10. Printing substrate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1-9 In a first aspect, the present invention provides a printing apparatus, comprising: a printing assembly 1, a pad printing unit, a first driving assembly 4, a printing substrate assembly, and a second driving assembly 7.

[0032] The printing assembly 1 is used to spray patterns onto the pad printing unit's printing plate 2. Preferably, the printing assembly 1 can be a digital inkjet printer, which may include an ink source, a digital printing body, and a printing control unit. The digital printing body is connected to the ink source and includes several monochrome printing units, each of which is arranged along an opening in the same direction. In this embodiment, the digital printing body is arranged in a CMYK four-color mode, but other color modes may also be used. The printing control unit may specifically be a built-in microcontroller or other microcontroller, which is electrically connected to at least one of the pad printing unit, the first driving assembly 4, the printing substrate assembly, and the second driving assembly 7.

[0033] The pad printing unit includes a pad printing component 2 and a pressure regulating unit 3. The pad printing component 2 is adapted to be in a ready-to-print state under the action of the pressure regulating unit 3. In this embodiment, the pad printing component 2 in the ready-to-print state is set in a planar state, which facilitates stable support of the spraying of the inkjet printing component 1 and avoids the problem of spraying deviation when it is deformed.

[0034] The first driving component 4 is connected to the pad printing unit and is adapted to drive the pad printing element 2 to reciprocate relative to the inkjet printing component 1. The first driving component 4 is communicatively connected to the inkjet printing component 1, specifically through a remote signal connection or an electrical connection via wires. In this embodiment, the pad printing element 2 and the pressure regulating unit 3 are interconnected, and the first driving component 4 drives both to move together. As a possible implementation, only the pad printing element 2 can be driven to move. In this embodiment, the direction of movement of the pad printing element 2 driven by the first driving component 4 is towards or away from the direction of the printing component.

[0035] The printing assembly and the inkjet assembly 1 are spaced apart to ensure that the inkjet assembly 1 has sufficient spray space for the pad 2. The printing assembly includes a pad 5 and a carrier group 6, wherein the carrier group 6 includes a first carrier key 61 and a second carrier key 62. The first carrier key 61 and the second carrier key 62 are adapted to respectively carry and limit the printing material 10 and expose the printing parts at different positions. In this embodiment, the printing parts at different positions are specifically the inner wall and outer wall of the printing material 10, and their specific shapes are not the same. They can be concave and convex, such as the inner and outer walls of a bowl, or they can be concave at different depths or convex at different degrees. The specific form of each carrier key is set according to the printing material 10, and can be bowl-shaped or round convex.

[0036] As a variable implementation, the shapes of the printing areas at different positions can also be the same. As a variable implementation, the carrier assembly 6 includes other carrier keys, such as a third carrier key and a fourth carrier key, so that when carrying and limiting the substrate 10, the printing areas in more directions and positions can be exposed, thereby improving the applicability of the printing device.

[0037] The second drive assembly 7 is connected to the printing assembly and is suitable for driving the pad printing head 5 and the carrier assembly 6 to move so that the sprayed pad printing part 2 comes into contact with the printing part of the substrate 10. The contact process is specifically a transfer process. The first drive assembly 4 and the second drive assembly 7 are connected in communication, specifically wirelessly or by wire.

[0038] The printing assembly includes different carrier positions 6 for different carrier keys, allowing different printing areas of the substrate 10 to be exposed when the substrate 10 is positioned to be printed. The pad printing unit 2, which receives ink sprayed from the inkjet printing assembly 1, can contact the substrate 10 on the corresponding carrier key via the printing head 5 and the second drive assembly 7, thus transferring the printing to different printing areas of the substrate 10. Simultaneously, because the pad printing unit 2 moves relative to the inkjet printing assembly 1 under the drive of the first drive assembly 4, it can repeatedly receive ink sprayed. In conjunction with the various drive assemblies, the pad printing unit 2 can continue to transfer the printing of the substrate 10 on the next carrier key after completing the transfer of the printing on a single carrier key, ensuring a high level of automation in the pad printing process, reducing production and debugging difficulties, minimizing time consumption, eliminating the need for two sets of equipment, and lowering costs.

[0039] The pad printing component 2 includes a pad printing body 21, a flipping drive component 22, and a support platform 23.

[0040] The pad printing body 21 includes an elastic printing substrate 211 and a limiting frame 212. The elastic printing substrate 211 is made of an elastic material, such as silicone or rubber, while the limiting frame 212 is made of a rigid material, such as metal or plastic, and is located around the elastic printing substrate 211. The pad printing body 21 is adapted to move to the printing position under the action of the platform 23 and the flipping drive 22, and under the action of the second drive assembly 7, moves towards the printing substrate 10 until they come into contact.

[0041] The flipping drive 22 is hinged to the limiting frame 212 of the pad printing body 21, specifically a rotary cylinder or motor, etc., used to drive the pad printing body 21 to flip and adjust the pad printing surface of the pad printing body 21 to a preset direction; the support platform 23 is a flat platform, connected to the first drive assembly 4, and can support the pad printing body 21, the flipping drive 22 and the pressure regulating unit 3, and is suitable for moving relative to the inkjet printing assembly 1 under the action of the first drive assembly 4.

[0042] The pressure regulating unit 3 includes: a first adsorption shell 31 and a first pressure regulating drive 32.

[0043] The first adsorption shell 31 is disposed between the support 23 and the pad printing body 21, and is adapted to adsorb the pad printing body 21. The side of the first adsorption shell 31 facing the pad printing body 21 is planar, and a plurality of adsorption holes are provided thereon. Preferably, the adsorption holes are evenly spaced.

[0044] The first pressure regulating drive 32 is specifically an air pump, which is connected to the first adsorption shell 31 through an air guide pipe. The air pump is remotely or electrically connected to the printing assembly 1. The first pressure regulating drive 32 is adapted to adjust the pressure inside the first adsorption shell 31. By adjusting the pressure and adsorbing, the elastic printing portion 211 in the pad printing component 2 overcomes gravity and is in a flat, ready-to-print state.

[0045] This configuration allows the portion of the pad printing body 21 that receives the pattern to be retracted due to gravity or other factors and become flat or nearly flat when the pattern is printed on the pad printing component 1. This avoids the problem of reduced printing accuracy caused by irregular shape or large drop on the side receiving the pattern.

[0046] The first driving assembly 4 includes a first guide portion 41 and a first driving member 42. The first guide portion 41 is preferably slidably connected to the pad printing member 2. The first guide portion 41 extends toward the printing assembly. The printing trajectory of the inkjet printing assembly 1 points toward the first guide portion 41. The first driving member 42 is electrically connected to the pad printing member 2, the pressure regulating unit 3 and the inkjet printing assembly 1 respectively, and is suitable for driving the pad printing member 2 to move along the first guide portion 41.

[0047] The bearing assembly 6 includes: a movable support 63 and an auxiliary drive component 64.

[0048] The movable support 63 is circular in shape and is provided with a number of first support keys 61 and a number of second support keys 62. The first support keys 61 are suitable for supporting the substrate 10 and exposing the convex part to be printed, and the second support keys 62 are suitable for supporting the substrate 10 and exposing its concave part to be printed.

[0049] The auxiliary drive component 64 is connected to the movable platform 63, driving the movable platform 63 to rotate along a preset rotation direction. The first bearing key 61 and the second bearing key 62 are staggered along the preset rotation direction. Preferably, to ensure the stable movement of the movable platform 63, the auxiliary drive component 64 includes a divider and a drive motor. The divider facilitates accurate positioning of the rotation position of the bearing key. Understandably, the auxiliary drive component 64 may only include the drive motor.

[0050] As an alternative implementation, the movable platform 63 can also be elongated, and it reciprocates along a fixed direction under the action of the auxiliary drive member 64.

[0051] The printing device also includes a number of bearing holes 65, which are correspondingly arranged on the movable support 63 and distributed in correspondence with the first bearing key 61, suitable for the second drive assembly 7 to pass through. The first bearing key 61 is suitable for moving towards or away from the printed part 2 after spraying under the action of the second drive assembly 7.

[0052] In one alternative embodiment, the printing apparatus further includes a plurality of bearing holes 65, a plurality of bearing rods 66, and a guide sleeve 67.

[0053] A plurality of bearing holes 65 are correspondingly disposed on the movable support 63, and the bearing holes 65 are distributed correspondingly to the first bearing key 61. As an alternative implementation, the bearing holes 65 may also be distributed together corresponding to the first bearing key 61 and the second bearing key 62, and the inner diameter of the bearing holes 65 is smaller than the outer diameter of the first bearing key 61. Preferably, the movable support 63 may be provided with a limiting groove for the bearing key to prevent it from slipping.

[0054] Several support rods 66 pass through the support holes 65, one end of which is connected to the first support key 61, and the other end is provided with a support plate. Other structures suitable for bearing force can also be provided, such as support blocks or support rings. The support plate is suitable for detachably connecting to the second drive assembly 7 and is suitable for moving towards or away from the sprayed pad 2 under the action of the second drive assembly 7.

[0055] The guide sleeve 67 is correspondingly disposed on the bearing hole 65 and is in a limiting connection with the movable bearing platform 63 at the outer periphery of the bearing hole 65, such as by screws or welding. The guide sleeve 67 is suitable for the bearing rod 66 to pass through and guide the bearing rod 66.

[0056] As an alternative implementation, the printing apparatus may include only a number of bearing holes 65, which are correspondingly arranged on the movable support 63 and distributed in correspondence with the first bearing key 61, suitable for the passage of the second drive assembly 7. The first bearing key 61 is suitable for moving towards or away from the coated pad 2 under the action of the second drive assembly 7.

[0057] The second drive component 7 includes: a first drive component 71 and a second drive component 72.

[0058] The first driving component 71 includes a second guide part 711 and a second driving component 712. The second guide part 711 is arranged toward the printing position of the pad printing body 21 and is movably connected to the pad printing head 5. The second driving component 712 is communicatively connected to the first driving assembly 4 and is arranged in cooperation with the pad printing head 5, and is suitable for driving the pad printing head 5 to move in a directional manner along the second guide part 711.

[0059] The second drive component 72 includes a third guide portion 721 and a third drive component 722. The third guide portion 721 extends toward the movable support 63 and is parallel to the second guide portion 711. A drive rod 75 is movably connected to it. The drive rod 75 is adapted to move along the third guide portion 721 under the action of the third drive component 722 and correspondingly drive the first bearing key 61 to move toward the printing position of the pad printing body 21.

[0060] In this embodiment, the various guide parts can be a combination structure of linear guide rail and ball screw, and the various driving components can be a drive motor, or a cylinder, electric cylinder, etc., preferably a servo motor.

[0061] The second driving component 72 also includes a limiting part 73 and a limiting adjustment part 74. The limiting part 73 is disposed at the end of the driving rod 75 facing the bearing assembly 6. The limiting part 73 is adapted to be limitedly connected to or separated from the receiving plate of the bearing rod 66 under the action of the limiting adjustment part 74. In this embodiment, the limiting part 73 is specifically a second adsorption shell, and the limiting adjustment part 74 is specifically a second pressure regulating driving component. Its structure is similar to that of the pressure regulating unit 3, and it can adsorb or disconnect from the receiving plate by adjusting the pressure.

[0062] As an alternative implementation, the limiting part 73 and the limiting adjustment part 74 may also be an electromagnetic adsorption component and a power switch, etc.

[0063] The printing apparatus also includes a first support platform 8 and a second support platform 9. The first support platform 8 supports the pad printing unit and the first drive assembly 4, and the inkjet printing assembly 1 is disposed on the upper side of the first support platform 8. The second support platform 9 is disposed at a distance from the first support platform 8, and a printing assembly and a second drive assembly 7 are disposed on it. Preferably, each support platform 23 is provided with a protective housing corresponding to the respective device.

[0064] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A printing device characterized by comprising: The application relates to a printing device. The printing device comprises a spraying assembly (1), a pad printing unit, a first driving assembly (4), a printing assembly and a second driving assembly (7). The pad printing unit comprises a pad printing piece (2) and a pressure regulating unit (3), the pad printing piece (2) is adapted to be in a printing state under the action of the pressure regulating unit (3), and the pad printing piece (2) in the printing state is adapted to receive spraying of the spraying assembly (1). The first driving assembly (4) is connected with the pad printing unit and is adapted to drive the pad printing piece (2) to move relative to the spraying assembly (1), and the first driving assembly (4) is communicatively connected with the spraying assembly (1). The printing assembly is arranged in a spaced manner relative to the spraying assembly (1) and comprises a pad printing head (5) and a bearing group position (6), the bearing group position (6) comprises at least a first bearing key position (61) and a second bearing key position (62) and is adapted to bear a limited printing object (10) and expose different printing parts of the printing object (10) respectively. The second driving assembly (7) is connected with the printing assembly and is adapted to drive the pad printing head (5) and the bearing group position (6) to move so that the pad printing piece (2) after spraying is in contact with the printing part of the printing object (10), and the first driving assembly (4) is communicatively connected with the second driving assembly (7).

2. The printing apparatus of claim 1, wherein The pad printing piece (2) comprises a pad printing body (21), a turnover driving piece (22) and a bearing platform (23). The turnover driving piece (22) is hinged with the pad printing body (21) and is adapted to drive the pad printing body (21) to turn over and adjust the pad printing surface of the pad printing body (21) to a preset direction. The bearing platform (23) is connected with the first driving assembly (4) and is adapted to bear the pad printing body (21), the turnover driving piece (22) and the pressure regulating unit (3) and move relative to the spraying assembly (1) under the action of the first driving assembly (4). The pad printing body (21) is adapted to move to a printing position under the action of the bearing platform (23) and the turnover driving piece (22) and move relative to the printing object (10) to mutual contact under the action of the second driving assembly (7). The pressure regulating unit (3) comprises a first adsorption shell (31) and a first pressure regulating driving piece (32).

3. The printing apparatus of claim 2, wherein The first adsorption shell (31) is arranged between the bearing platform (23) and the pad printing body (21) and is adapted to correspondingly adsorb the pad printing body (21), and a side of the first adsorption shell (31) facing the pad printing body (21) is provided with a plurality of adsorption holes. The first pressure regulating driving piece (32) is in communication with the first adsorption shell (31) and is communicatively connected with the spraying assembly (1), and the first pressure regulating driving piece (32) is adapted to adjust the pressure in the first adsorption shell (31) so that the pad printing piece (2) is in a flat printing state. The first driving assembly (4) comprises a first guide part (41) and a first driving piece (42), the first guide part (41) is movably connected with the pad printing piece (2) and extends towards the printing assembly, the spraying track of the spraying assembly (1) points to the first guide part (41), and the first driving piece (42) is communicatively connected with the pad printing piece (2), the pressure regulating unit (3) and the spraying assembly (1) respectively and is adapted to drive the pad printing piece (2) to move along the first guide part (41).

4. The printing apparatus of claim 2, wherein ​ 5. The printing apparatus of claim 4, wherein The bearing group position (6) comprises: A movable bearing platform (63) is provided with a plurality of first bearing key positions (61) and a plurality of second bearing key positions (62), the first bearing key position (61) is suitable for bearing the printing material (10) and exposing the outer convex printing position, and the second bearing key position (62) is suitable for bearing the printing material (10) and exposing the inner concave printing position thereof; An auxiliary driving member (64) is connected with the movable bearing platform (63) and drives the movable bearing platform (63) to rotate in a predetermined rotation direction, and the first bearing key position (61) and the second bearing key position (62) are arranged in a staggered manner along the predetermined rotation direction.

6. The printing apparatus of claim 5, wherein Further comprising: A plurality of bearing holes (65) are correspondingly provided on the movable bearing platform (63) and are distributed correspondingly with the first bearing key position (61), and are suitable for being passed through by the second driving assembly (7), and the first bearing key position (61) is suitable for moving towards or away from the direction of the printed member (2) after spraying under the action of the second driving assembly (7).

7. The printing apparatus of claim 5, wherein Further comprising: A plurality of bearing holes (65) are correspondingly provided on the movable bearing platform (63) and are distributed correspondingly with the first bearing key position (61); A plurality of bearing rods (66) pass through the bearing holes (65), one end of the bearing rod (66) is connected with the first bearing key position (61), and the other end of the bearing rod (66) is provided with a bearing plate and is suitable for detachably and cooperatively connecting the second driving assembly (7) and is suitable for moving towards or away from the direction of the printed member (2) after spraying under the action of the second driving assembly (7); A guide sleeve (67) is correspondingly provided on the bearing hole (65) and is limitingly connected with the outer extension circumferential side position of the bearing hole (65), is suitable for being passed through by the bearing rod (66), and guides the bearing rod (66).

8. The printing apparatus of claim 7, wherein The second driving assembly (7) comprises: A first driving subassembly (71) comprises a second guide portion (711) and a second driving member (712), the second guide portion (711) is provided towards the printing position direction of the printing main body (21) and is movably connected with the printing head (5), the second driving member (712) is communicatively connected with the first driving assembly (4) and is cooperatively provided with the printing head (5) and is suitable for driving the printing head (5) to move along the second guide portion (711) in a directional manner; A second driving subassembly (72) comprises a third guide portion (721) and a third driving member (722), the third guide portion (721) extends towards the movable bearing platform (63) and is parallel with the second guide portion (711), a driving rod (75) is movably connected on the third guide portion (721), the driving rod (75) is suitable for moving along the third guide portion (721) under the action of the third driving member (722) and correspondingly driving the first bearing key position (61) to move towards the printing position direction of the printing main body (21).

9. The printing apparatus of claim 8, wherein, The second driving subassembly (72) further comprises a limiting part (73) and a limiting adjusting part (74), the limiting part (73) is arranged at one end of the driving rod (75) towards the bearing group (6), and the limiting part (73) is suitable for being connected or separated with the bearing plate of the bearing rod (66) under the action of the limiting adjusting part (74).

10. The printing apparatus according to any one of claims 1 to 9, characterized by Further comprising: A first bearing platform (8) corresponding to bearing the pad printing unit and the first driving assembly (4), the pad printing assembly (1) is arranged on the upper side of the first bearing platform (8); A second bearing platform (9) is arranged at intervals with the second bearing platform (9), and the pad printing assembly and the second driving assembly (7) are arranged on the second bearing platform (9).

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