Transfer printing silica gel head for digital jet printing and transfer printing system

Abstract

The utility model relates to the technical field of printing, and discloses a pad printing silica gel head for digital jet printing and a pad printing system, the pad printing silica gel head for digital jet printing comprises a pad printing silica gel head, the bottom of the pad printing silica gel head is provided with a printing surface, and the interior of the pad printing silica gel head is provided with a cavity; the shaping mold is connected in the cavity and divides the cavity into an inner cavity and an outer cavity, and a shaping surface is arranged at the bottom of the shaping mold and is a plane or a flat arc surface; a first communicating hole for communicating the inner cavity with the outer cavity is formed in the shaping surface; the negative pressure structure is communicated with the inner cavity and is used for vacuumizing the cavity; the inflating structure is communicated with the inner cavity and is used for inflating the inner cavity; wherein the printing surface is provided with a shaping position which is adsorbed on the shaping surface when the negative pressure structure is vacuumized, and a separating position which is separated from the shaping surface when the inflating structure is inflated. According to the transfer printing silica gel head for digital jet printing, the printing surface is provided with the setting position and the separation position, the jet printing precision can be improved through the setting position, and a good printing effect can be obtained through the separation position.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a pad printing silicone head and a pad printing system for digital inkjet printing. Background Art

[0002] With the development of social economy and the continuous improvement of consumption level, people are pursuing high-quality life and have put forward higher requirements for the quality and appearance of daily necessities. For example, in addition to the functional requirements of daily ceramics, people's requirements for the decorative effects of daily ceramics are also constantly increasing. Porcelain with rich colors and fine and beautiful patterns is more popular with consumers.

[0003] At present, the printing processes for daily-use ceramics mainly include: hand-painted, water transfer and pad printing. Hand-painted is unique, difficult to make, and costly, and is only suitable for customization or small-batch production. Water transfer printing requires the production of flower paper and manual decals, which is a complicated process and difficult to achieve automated production. Pad printing is a printing process that can achieve large-scale automated production. The pad printing system generally prints the required pattern from bottom to top on the printing surface of the pad printing rubber head, and then prints the pattern from top to bottom on the workpiece through the pad printing rubber head. However, the printing surface of the pad printing rubber head has problems such as irregular shape and large difference between the lowest point and the highest point, which can easily lead to low printing accuracy and thus affect the printing effect. Utility Model Content

[0004] In view of this, the utility model provides a pad printing silicone head and a pad printing system for digital printing, so as to solve the problem of low printing accuracy caused by irregular shape or large drop of printing surface.

[0005] In the first aspect, the utility model provides a pad printing silicone head for digital inkjet printing, comprising a pad printing rubber head, a shaping mold, a negative pressure structure and an inflation structure; a printing surface is provided at the bottom of the pad printing rubber head, and a cavity is provided inside; the shaping mold is connected in the cavity and divides the cavity into an inner cavity and an outer cavity, and a shaping surface is provided at the bottom of the shaping mold, and the shaping surface is a plane or a flat arc surface; a first connecting hole connecting the inner cavity and the outer cavity is provided on the shaping surface; the negative pressure structure is connected to the inner cavity for vacuumizing the cavity; the inflation structure is connected to the inner cavity for inflating the inner cavity; wherein the printing surface has a shaping position which is adsorbed on the shaping surface when the negative pressure structure is vacuumed, and a separation position which is separated from the shaping surface when the inflation structure is inflated.

[0006] Beneficial effect: when the negative pressure structure is evacuated, the air pressure in the inner cavity is lower than the atmospheric pressure, and the vacuum suction force sucks the printing surface of the pad printing rubber head through the first connecting hole on the shaping surface, so that it is close to the shaping surface at the bottom of the shaping mold and forms a plane or flat arc surface that matches the shape of the shaping surface. At this time, the shape of the printing surface is regular and the height difference is small, and the printing module has high printing accuracy on the printing surface; after the pattern is sprayed onto the printing surface of the pad printing rubber head, the negative pressure structure stops working, and the inflation structure inflates the inner cavity to make the air pressure in the cavity higher than the atmospheric pressure, and the printing surface of the pad printing rubber head is separated from the shaping surface, and the pad printing rubber head returns to its original shape and maintains a certain elasticity. At this time, the pattern on the printing surface of the pad printing rubber head is printed on the workpiece, and a better printing effect will be obtained.

[0007] In an optional embodiment, the shaping surface is a flat arc surface, and the height difference δ between the highest point and the lowest point of the flat arc surface satisfies, δ≤5mm.

[0008] Beneficial effect: A regular arc with a low and gentle arc surface can be formed, so that when the printing surface is close to the shaping surface, a regular arc with a low and gentle arc surface can also be formed, thereby ensuring the printing accuracy of the printing module on the printing surface.

[0009] In an optional embodiment, a second connecting hole is provided on the pad printing rubber head, and the second connecting hole is connected to the inner cavity; the pad printing silicone head for digital inkjet printing also includes a three-way valve, and the second connecting hole is connected to the negative pressure structure and the inflation structure through the three-way valve.

[0010] In an optional embodiment, the pad printing rubber head is a hemispherical structure, and the shaping mold is a cylindrical structure.

[0011] In an optional embodiment, the negative pressure structure is a vacuum pump.

[0012] In an optional embodiment, the inflatable structure is a compressed air tank.

[0013] In an optional embodiment, there are multiple first connecting holes, and the multiple first connecting holes are evenly distributed on the shaping surface.

[0014] In a second aspect, the utility model further provides a pad printing system, comprising:

[0015] The above-mentioned pad printing silicone head for digital printing;

[0016] A printing module, arranged at the bottom of the pad printing head, for printing the printing surface at the shaping position;

[0017] The fixing position is arranged at the bottom of the pad printing rubber head and is used to carry and fix the workpiece to be printed.

[0018] In an optional implementation, it also includes:

[0019] A working slide, the printing module and the fixing position are arranged at intervals on the top of the working slide;

[0020] The translation driving structure has a power output end connected to the working slide and is used to drive the working slide to translate.

[0021] In an optional embodiment, it further includes a lifting drive structure, wherein a power output end of the lifting drive structure is connected to the pad printing rubber head for driving the pad printing rubber head to lift and lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a pad printing system according to an embodiment of the utility model;

[0024] Figure 2 A cross-sectional view of a shaping mold of a pad printing system according to an embodiment of the utility model;

[0025] Figure 3 A schematic diagram of a shaping mold of a pad printing system according to an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of a printing start position and a printing end position of a printing module according to an embodiment of the utility model;

[0027] Figure 5 A schematic diagram of a working state of a pad printing system according to an embodiment of the utility model;

[0028] Figure 6 A second schematic diagram of a working state of a pad printing system according to an embodiment of the utility model;

[0029] Figure 7 The third schematic diagram of the working state of a pad printing system according to an embodiment of the utility model;

[0030] Figure 8 A fourth schematic diagram of a working state of a pad printing system according to an embodiment of the utility model;

[0031] Fig. 9 A fifth schematic diagram of a working state of a pad printing system according to an embodiment of the utility model;

[0032] Fig.10 A sixth schematic diagram of a working state of a pad printing system according to an embodiment of the utility model;

[0033] Fig.11 A seventh schematic diagram of a working state of a pad printing system according to an embodiment of the utility model;

[0034] Fig.12 FIG8 is a schematic diagram of the working state of a pad printing system according to an embodiment of the present utility model.

[0035] Description of reference numerals:

[0036] 1. Pad printing rubber head; 11. Printing surface; 12. Inner cavity; 13. Outer cavity; 14. Second connecting hole; 2. Shaping mold; 21. Shaping surface; 22. First connecting hole; 3. Negative pressure structure; 4. Inflatable structure; 5. Three-way valve; 6. Printing module; 7. Fixed position; 8. Workpiece; 9. Working slide. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0038] Combine the following Figures 1 to 12 , describing an embodiment of the utility model.

[0039] According to an embodiment of the utility model, on the one hand, a pad printing silicone head for digital inkjet printing is provided, comprising a pad printing rubber head 1, a shaping mold 2, a negative pressure structure 3 and an inflatable structure 4; a printing surface 11 is provided at the bottom of the pad printing rubber head 1, and a cavity is provided inside; the shaping mold 2 is connected in the cavity and divides the cavity into an inner cavity 12 and an outer cavity 13, and a shaping surface 21 is provided at the bottom of the shaping mold 2, and the shaping surface 21 is a plane or a flat arc surface; a first connecting hole 22 connecting the inner cavity 12 and the outer cavity 13 is provided on the shaping surface 21; the negative pressure structure 3 is connected to the inner cavity 12 for vacuumizing the cavity; the inflatable structure 4 is connected to the inner cavity 12 for inflating the inner cavity 12; wherein the printing surface 11 has a shaping position adsorbed on the shaping surface 21 when the negative pressure structure 3 is vacuumed, and a separation position separated from the shaping surface 21 when the inflatable structure 4 is inflated.

[0040] When the negative pressure structure 3 is evacuated, the air pressure in the inner cavity 12 is lower than the atmospheric pressure, and the vacuum suction force sucks the printing surface 11 of the pad printing rubber head 1 through the first connecting hole 22 on the shaping surface 21, so that it is close to the shaping surface 21 at the bottom of the shaping mold 2 and forms a plane or a flat arc surface that matches the shape of the shaping surface 21. At this time, the printing surface 11 has a regular shape and a small drop, and the printing module 6 has high printing accuracy on the printing surface 11; after the pattern is printed on the printing surface 11 of the pad printing rubber head 1, the negative pressure structure 3 stops working, and the inflation structure 4 inflates the inner cavity 12 to make the air pressure in the cavity higher than the atmospheric pressure, and the printing surface 11 of the pad printing rubber head 1 is separated from the shaping surface 21, and the pad printing rubber head 1 returns to its original shape and maintains a certain elastic force. At this time, the pattern on the printing surface 11 of the pad printing rubber head 1 is printed on the workpiece 8, and a better printing effect will be obtained. The pad printing silicone head for digital printing provided in this embodiment has a printing surface 11 of the pad printing silicone head 1 having a shaping position and a separation position. The shaping position can be used to improve the printing accuracy, and the separation position can be used to obtain a better printing effect.

[0041] In this embodiment, the flat arc surface refers to an arc surface that is lower in curvature than a general arc surface and is close to a plane, that is, an arc surface with a smaller height difference between the highest point and the lowest point of the arc surface.

[0042] In one embodiment, the height difference δ between the highest point and the lowest point of the flat arc surface satisfies δ≤5mm.

[0043] A regular arc with a low and gentle arc surface can be formed, so that when the printing surface 11 is close to the shaping surface 21, a regular arc with a low and gentle arc surface can also be formed, ensuring the printing accuracy of the printing module 6 on the printing surface 11. In a specific implementation, the drop δ between the highest point and the lowest point of the flat arc surface can be 5mm.

[0044] In one embodiment, a second connecting hole 14 is provided on the pad printing rubber head 1, and the second connecting hole 14 is connected to the inner cavity 12; the pad printing silicone head for digital printing also includes a three-way valve 5, and the second connecting hole 14 is connected to the negative pressure structure 3 and the inflation structure 4 through the three-way valve 5.

[0045] The connection or disconnection of the negative pressure structure 3 and the inflatable structure 4 with the inner cavity 12 can be controlled by the three-way valve 5. The three-way valve 5 can control the inflatable structure 4 to be disconnected from the second connecting hole 14 when the negative pressure structure 3 is connected to the second connecting hole 14; the three-way valve 5 can also control the inflatable structure 4 to be connected to the second connecting hole 14 when the negative pressure structure 3 is disconnected from the second connecting hole 14; the three-way valve 5 can also control the negative pressure structure 3 and the inflatable structure 4 to be disconnected from the second connecting hole 14.

[0046] In a specific implementation, the three-way valve 5 may be an electromagnetic three-way valve 5 , which can realize automatic control.

[0047] As a convertible embodiment, the pad printing rubber head 1 may be provided with a second connecting hole 14 , which is connected to the inner cavity 12 ; there are two second connecting holes 14 , one second connecting hole 14 is connected to the negative pressure structure 3 , and the other second connecting hole 14 is connected to the inflation structure 4 .

[0048] In one embodiment, the pad printing rubber head 1 is a hemispherical structure, and the shaping mold 2 is a cylindrical structure.

[0049] The pad printing rubber head 1 is a hemispherical structure with elasticity, and can be easily deformed according to the shape of the workpiece 8 to be printed, so as to perform printing better. The shaping mold 2 is a cylindrical structure, and the shaping surface 21 is located on the bottom surface of the cylindrical structure. The cylindrical structure itself is relatively regular, and when the printing surface 11 is adsorbed, it will not cause a large deformation of the printing surface 11.

[0050] In one embodiment, the negative pressure structure 3 is a vacuum pump.

[0051] The vacuum pump can obtain a vacuum by evacuating the inner cavity 12 so that the gas in the outer cavity 13 is evacuated through the first connecting hole 22 and the inner cavity 12 , and the air pressure in the cavity is lower than the atmospheric pressure, so that the printing surface 11 can be adsorbed on the shaping surface 21 .

[0052] In one embodiment, the inflatable structure 4 is a compressed air tank.

[0053] The compressed air storage tank can inflate the inner cavity 12 and enter the outer cavity 13 through the first connecting hole 22 on the shaping surface 21 of the inner cavity 12, so that the air pressure in the cavity is greater than the atmospheric pressure, and the pad printing rubber head 1 returns to its original shape and maintains a certain elastic force.

[0054] In one embodiment, there are a plurality of first communicating holes 22 , and the plurality of first communicating holes 22 are evenly distributed on the shaping surface 21 .

[0055] The plurality of first connecting holes 22 can adsorb the printing surface 11 more evenly, thereby preventing the printing surface 11 from being greatly deformed due to strong local suction.

[0056] According to an embodiment of the utility model, on the other hand, a pad printing system is also provided, comprising the above-mentioned pad printing silicone head for digital printing, a printing module 6 and a fixing position 7; the printing module 6 is arranged at the bottom of the pad printing rubber head 1, and is used to print on the printing surface 11 in a fixed position; the fixing position 7 is arranged at the bottom of the pad printing rubber head 1, and is used to carry and fix the workpiece 8 to be printed.

[0057] The printing module 6 can print on the printing surface 11 in the fixed position, and the fixing position 7 can fix the workpiece 8 to be printed, so as to facilitate the pad printing head 1 to print on the workpiece 8 and prevent defects such as printing misalignment caused by the movement of the workpiece 8 when the pad printing head 1 prints on the workpiece 8.

[0058] Specifically, the workpiece 8 to be printed may be a ceramic product such as a bowl or plate. The printing module 6 is a digital printing module 6, which includes a plurality of color nozzles, an ink supply system and a control system.

[0059] In one embodiment, it also includes a working slide 9 and a translation drive structure; the printing module 6 and the fixing position 7 are spaced apart on the top of the working slide 9; the power output end of the translation drive structure is connected to the working slide 9 for driving the working slide 9 to translate.

[0060] The translation drive structure drives the working slide 9 to translate. The translation of the working slide 9 can drive the 6 fixed positions 7 of the printing module to move back and forth, so that the printing module 6 and the fixed positions 7 move alternately to the bottom of the pad printing rubber head 1, and the printing module 6 prints on the pad printing rubber head 1 and the pad printing rubber head 1 prints the printed pattern onto the workpiece 8 alternately, thereby ensuring printing efficiency.

[0061] In one embodiment, a lifting drive structure is also included, and a power output end of the lifting drive structure is connected to the pad printing rubber head 1 for driving the pad printing rubber head 1 to move up and down.

[0062] In this embodiment, Figures 5 to 12 As shown ( Figures 5 to 12 The different working states of the pad printing system are shown in the figure, and each working state is performed in sequence according to the accompanying drawings). The working process of the pad printing system includes: Figure 5 As shown, after the pad printing system receives the printing command (or completes the working cycle of the previous workpiece 8), the pad printing head 1 moves downward under the drive of the lifting device, the working slide 9 translates under the drive of the translation drive structure, the fixed position 7 moves away, and the printing module 6 moves toward the bottom of the pad printing head 1; Figure 6 As shown, when the pad printing head 1 moves downward, the three-way valve 5 connects the negative pressure structure 3 with the inner cavity 12, and the negative pressure structure 3 makes the pressure of the inner cavity 12 of the pad printing head 1 lower than the atmospheric pressure, and the vacuum suction force sucks the printing surface 11 at the bottom of the pad printing head 1 through the first connecting hole 22 on the shaping surface 21 of the shaping mold 2, so that it is closely attached to the shaping surface 21 and forms a plane or a flat arc surface close to a plane; as shown in FIG. Figure 7 As shown, when the pad printing head 1 moves down to the right position, the printing module 6 moves horizontally to the printing start position driven by the working slide 9, and starts to print on the printing surface 11 of the pad printing head 1; Figure 8As shown, during the printing process, the printing module 6 moves from the printing start position to the printing end position driven by the working slide 9 to complete the printing on the printing surface 11; after the printing is completed, the working slide 9 moves in the reverse direction, and the pad printing head 1 moves upward; Fig. 9 As shown, during the rising process of the pad printing rubber head 1, the three-way valve 5 disconnects the connection between the negative pressure structure 3 and the inner cavity 12, and connects the inflation structure 4 and the inner cavity 12, so that the air pressure in the cavity is higher than the atmospheric pressure, the pad printing rubber head 1 returns to its original shape and maintains a certain elastic force, and the pad printing rubber head 1 starts to move downward after rising to the end point; Fig.10 As shown, while the pad printing rubber head 1 moves downward, the working slide 9 moves in the opposite direction to the pad printing position, at which time the fixed position 7 and the workpiece 8 fixed thereon are located directly below the pad printing rubber head 1; Fig.11 As shown, the pad printing head 1 continues to move downward, and prints the pattern from the printing surface 11 of the pad printing head 1 onto the workpiece 8, completing the pad printing; Fig.12 As shown, after the pad printing is completed, the pad printing rubber head 1 moves upward and stops after reaching the rising end point, and the pad printing work of the pad printing system is completed, or the next work cycle begins.

[0063] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A pad printing silicone head for digital printing, It is characterized in that include: A pad printing rubber head (1) is provided with a printing surface (11) at the bottom and a cavity inside; A shaping mold (2) is connected in the cavity and divides the cavity into an inner cavity (12) and an outer cavity (13); a shaping surface (21) is provided at the bottom of the shaping mold (2); the shaping surface (21) is a plane or a flat arc surface; a first connecting hole (22) is provided on the shaping surface (21) and connects the inner cavity (12) and the outer cavity (13); A negative pressure structure (3) is communicated with the inner cavity (12) and is used to evacuate the cavity; an inflatable structure (4), which is in communication with the inner cavity (12) and is used to inflate the inner cavity (12); The printing surface (11) has a shaping position where it is adsorbed on the shaping surface (21) when the negative pressure structure (3) is evacuated, and a separation position where it is separated from the shaping surface (21) when the inflatable structure (4) is inflated.

2. The pad printing silicone head for digital printing according to claim 1, It is characterized in that The shaping surface (21) is a flat arc surface, and the height difference δ between the highest point and the lowest point of the flat arc surface satisfies δ≤5mm.

3. The pad printing silicone head for digital printing according to claim 1, It is characterized in that The pad printing rubber head (1) is provided with a second connecting hole (14), and the second connecting hole (14) is connected to the inner cavity (12); the pad printing silicone head for digital printing also includes a three-way valve (5), and the second connecting hole (14) is connected to the negative pressure structure (3) and the inflation structure (4) through the three-way valve (5).

4. The pad printing silicone head for digital printing according to claim 3, It is characterized in that The second connecting hole (14) is arranged on the top of the pad printing rubber head (1).

5. The pad printing silicone head for digital printing according to any one of claims 1 to 4, It is characterized in that The pad printing rubber head (1) is a hemispherical structure, and the shaping mold (2) is a cylindrical structure.

6. The pad printing silicone head for digital printing according to any one of claims 1 to 4, It is characterized in that The negative pressure structure (3) is a vacuum pump; and / or the inflation structure (4) is a compressed air storage tank.

7. The pad printing silicone head for digital printing according to any one of claims 1 to 4, It is characterized in that There are a plurality of the first connecting holes (22), and the plurality of the first connecting holes (22) are evenly distributed on the shaping surface (21).

8. A pad printing system, It is characterized in that include: The pad printing silicone head for digital inkjet printing according to any one of claims 1 to 7; A printing module (6) is arranged at the bottom of the pad printing head (1) and is used for printing the printing surface (11) at the shaping position; A fixing position (7) is arranged at the bottom of the pad printing rubber head (1) and is used to carry and fix a workpiece (8) to be printed.

9. The pad printing system according to claim 8, It is characterized in that Also includes: A working slide (9), wherein the printing module (6) and the fixing position (7) are arranged at intervals on the top of the working slide (9); A translation driving structure, wherein a power output end is connected to the working slide (9) and is used to drive the working slide (9) to translate.

10. The pad printing system according to claim 8, It is characterized in that It also comprises a lifting drive structure, wherein a power output end of the lifting drive structure is connected to the pad printing rubber head (1) and is used to drive the pad printing rubber head (1) to lift and lower.

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