Round flattening type high-speed screen printing machine

Abstract

The invention discloses a circular flattening type high-speed screen printing machine, and relates to the technical field of printing machines. The circular flattening type high-speed screen printing machine comprises a first unit, a second unit, a paper positioning system, a first double-diameter roller, a drying system, a second double-diameter roller and a paper conveying roller. According to the circular flattening type high-speed screen printing machine, the first double-diameter roller and the second double-diameter roller are doubled as traditional rollers, a 270-degree printing contact surface is ensured, the problem that printing ink is not sufficiently transferred at a high speed is solved, through the design of the drying system, the printing surface is efficiently dried, and the printing quality is ensured; by adopting a circular flattening silk-screen printing mode and matching with the two double-diameter rollers, staggered printing is performed on odd and even surfaces of the two units, the silk-screen printing speed can be increased to 10000 printing per hour, meanwhile, the circular flattening mode is adopted, the printing pressure is better, and therefore it is guaranteed that the printing machine is high in printing speed and good in quality, and the use requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of printing presses, and specifically to a high-speed screen printing press in a flat-bed cylinder form. Background Art

[0002] The core principle of a screen printing press is to use the basic principle that the mesh holes in the graphic part of the screen printing plate can pass through the ink, while the mesh holes in the non-graphic part are blocked and cannot pass through the ink for printing. Specifically, the screen printing plate consists of a screen frame and a screen. A photosensitive glue is coated on the screen. Through processes such as exposure and development, the photosensitive glue in the graphic part is dissolved and removed, forming permeable mesh holes, while the photosensitive glue in the non-graphic part solidifies and blocks the mesh holes. During printing, a squeegee applies a certain pressure on the screen printing plate and moves at a constant speed, so that the ink is squeezed by the squeegee and transferred to the printing substrate through the mesh holes in the graphic part, forming the same graphics as the original manuscript.

[0003] Due to structural reasons, traditional screen printing presses have low speed and low automation, and are not suitable for the current fast-paced printing form. After single-sided printing, it is necessary to stop the machine to replace the screen printing plate or adjust the working station, and continuous operation cannot be carried out. The natural drying or inefficient drying system results in a slow drying speed of the ink, which is prone to smudging. The diameter of the drum is proportional to the printing time, and a small-diameter drum cannot meet the requirements of high-speed printing. In view of the deficiencies of the prior art, the present invention provides a high-speed screen printing press in a flat-bed cylinder form to solve the above problems. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a high-speed screen printing press in a flat-bed cylinder form. The first double-diameter drum and the second double-diameter drum are twice the size of traditional drums, ensuring a 270° printing contact surface to solve the problem of insufficient ink transfer at high speeds. Through the design of the drying system, the printing surface is efficiently dried to ensure printing quality. Using the flat-bed cylinder screen printing method and cooperating with two double-diameter drums, printing on the odd and even sides of two units alternately can increase the screen printing speed to 10,000 impressions per hour. At the same time, using the flat-bed cylinder method, the printing pressure is better. Therefore, it ensures that the printing press has a fast printing speed and good quality, meeting the usage requirements.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A high-speed screen printing press in a flat-bed cylinder form, comprising a first unit, a second unit, a paper positioning system, a first double-diameter drum, a drying system, a second double-diameter drum, and a paper transfer drum;

[0006] The first unit is arranged on the ground, and internally provided with a first screen printing plate, a first inkjet system, and a first squeegee;

[0007] The second unit is arranged on the side of the first unit, and internally provided with a second screen printing plate, a second inkjet system, and a second squeegee;

[0008] The paper positioning system is set at the feeding position of the first unit;

[0009] The first double-diameter cylinder is set inside the first unit and is located below the first screen printing plate;

[0010] The drying system is set inside the first unit;

[0011] The second double-diameter cylinder is set inside the second unit and is located below the second screen printing plate;

[0012] The paper transfer cylinder is set between the first double-diameter cylinder and the second double-diameter cylinder.

[0013] Preferably, the first unit and the second unit are respectively provided with a first gripper and a second gripper, and the first gripper and the second gripper are respectively arranged inside the first double-diameter cylinder and the second double-diameter cylinder.

[0014] Preferably, both the first double-diameter cylinder and the second double-diameter cylinder are divided into two sides, namely side A and side B. When the first double-diameter cylinder runs to side A, the first screen printing plate moves in a following linear motion along with side A. At the same time, the first double-diameter cylinder rotates uniformly from side A to side B. When the printing on side A is completed, the first screen printing plate starts to move in the opposite direction and returns to the initial position. When the first double-diameter cylinder rotates to side B, the substrate on side B is not printed.

[0015] Preferably, when the first double-diameter cylinder rotates to side B, the first screen printing plate makes preparations for printing the next side A.

[0016] Preferably, both the first gripper and the second gripper adopt a cam drive mode.

[0017] Preferably, the drying system uses a UV circulation device to quickly dry the substrate.

[0018] Preferably, the first unit and the second unit are respectively provided with a driving structure for driving the first double-diameter cylinder and the second double-diameter cylinder.

[0019] Preferably, the paper transfer cylinder is set inside the first unit and the second unit, and the first unit and the second unit are respectively provided with a driving structure for driving the paper transfer cylinder.

[0020] Preferably, both the first double-diameter cylinder and the second double-diameter cylinder adopt air suction cylinders.

[0021] Preferably, the operation of the first unit and the second unit is staggered. When the A side of the first double-diameter cylinder of the first unit is printing, the A side of the second double-diameter cylinder of the second unit is not printing. When the first double-diameter cylinder of the first unit rotates to the B side, it only plays a role in paper transfer and does not print, and the first screen plate returns to the initial position. When the paper passes through the transfer cylinder and reaches the B side of the second double-diameter cylinder of the second unit, printing is carried out.

[0022] The present invention discloses a high-speed screen printing machine in a flat-bed cylinder form, and the beneficial effects thereof are as follows:

[0023] 1. For this high-speed screen printing machine in a flat-bed cylinder form, the first double-diameter cylinder and the second double-diameter cylinder are twice the diameter of the traditional cylinder, ensuring a 270° printing contact surface, solving the problem of insufficient ink transfer at high speeds. Through the design of the drying system, the printed surface is efficiently dried to ensure printing quality. Using the flat-bed cylinder screen printing method and cooperating with two double-diameter cylinders, printing is carried out alternately on the odd and even sides of two units respectively, which can increase the screen printing speed to 10,000 impressions per hour. At the same time, using the flat-bed cylinder method, the printing pressure is better. Therefore, it is ensured that the printing machine has a fast printing speed and good quality, meeting the usage requirements.

[0024] 2. For this high-speed screen printing machine in a flat-bed cylinder form, both the first double-diameter cylinder and the second double-diameter cylinder are suction cylinders, with φ0.5mm micropores densely distributed on the surface. Cooperating with an -80kPa vacuum pump, instantaneous adsorption and positioning of the paper are realized. The transfer cylinder uses gear transmission to ensure zero-speed difference transfer of the paper from the first unit to the second unit, ensuring stable operation of the equipment. The clamping force of the first gripper and the second gripper can be finely adjusted according to the material and thickness of the printed matter to avoid damage to the printed matter. At the same time, the opening and closing actions of the grippers are synchronized with the rotation of the double-diameter cylinder, ensuring the stability of the printed matter during transfer.

[0025] 3. For this high-speed screen printing machine in a flat-bed cylinder form, the drying system uses a UV circulation device to quickly dry the printed matter. The UV circulation device integrates a PID temperature control module, with an air volume of 20m 3 / min and a temperature accuracy of ±2°C, saving 40% energy compared with traditional infrared drying, ensuring energy-saving, high-efficiency, green and environmental protection of the equipment. The temperature and wind speed of the drying system can be adjusted according to the material of the printed matter and the characteristics of the printing ink to ensure the best balance between the drying effect and the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the first double-diameter roller and the second double-diameter roller of the present invention.

[0029] In the figure: 1. The first unit; 2. The second unit; 3. The paper positioning system; 4. The first double-diameter roller; 41. The first screen printing plate; 42. The first gripper; 43. The first inkjet system; 44. The first squeegee; 5. The drying system; 6. The paper transfer roller; 7. The second double-diameter roller; 71. The second screen printing plate; 72. The second gripper; 73. The second inkjet system; 74. The second squeegee. Specific embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] The embodiments of the present application provide a high-speed screen printing machine in a flat-bed cylinder form, which solves the problems of low speed, low automation degree of traditional screen printing machines, inadaptability to the current fast-paced printing form, the need to stop the machine to replace the screen printing plate or adjust the working station after single-sided printing, inability to operate continuously, slow ink drying speed caused by natural drying or inefficient drying systems, easy smudging, and the fact that the drum diameter is proportional to the printing time, and small-diameter drums cannot meet the requirements of high-speed printing.

[0032] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0033] Embodiment 1:

[0034] The embodiments of the present invention disclose a high-speed screen printing machine in a flat-bed cylinder form. As shown in the attached Figure 1-2 figure, it includes a first unit 1, a second unit 2, a paper positioning system 3, a first double-diameter roller 4, a drying system 5, a second double-diameter roller 7, and a paper transfer roller 6;

[0035] The first unit 1 is arranged on the ground, and a first screen printing plate 41, a first inkjet system 43, and a first squeegee 44 are provided inside it;

[0036] The second unit 2 is arranged on the side of the first unit 1, and a second screen printing plate 71, a second inkjet system 73, and a second squeegee 74 are provided inside it;

[0037] The first unit 1 and the second unit 2 are arranged in a mirror image;

[0038] The first screen printing plate 41 and the second screen printing plate 71 adopt a high-tension metal frame and achieve a precise displacement compensation of ±5 mm through the drive of a servo motor.

[0039] The first inkjet system 43 and the second inkjet system 73 adopt piezoelectric nozzles and jet functional ink as needed.

[0040] The first squeegee 44 and the second squeegee 74 adopt pneumatic suspension technology, and the pressure can be automatically adjusted according to the printing speed.

[0041] The paper positioning system 3 is set at the feeding position of the first unit 1;

[0042] The first double-diameter drum 4 is set inside the first unit 1 and is located below the first screen printing plate 41;

[0043] The drying system 5 is set inside the first unit 1;

[0044] The second double-diameter drum 7 is set inside the second unit 2 and is located below the second screen printing plate 71;

[0045] The first double-diameter drum 4 and the second double-diameter drum 7 have a diameter of φ600 mm, which is twice that of a traditional drum, ensuring a 270° printing contact surface and solving the problem of insufficient ink transfer at high speeds. Both the first double-diameter drum 4 and the second double-diameter drum 7 adopt suction drums, with φ0.5 mm micropores densely distributed on the surface, and cooperate with an -80 kPa vacuum pump to achieve instantaneous adsorption and positioning of the paper.

[0046] The paper transfer drum 6 is set between the first double-diameter drum 4 and the second double-diameter drum 7. The paper transfer drum 6 adopts gear transmission to ensure zero-speed difference transfer of the paper from the first unit 1 to the second unit 2.

[0047] The first gripper 42 and the second gripper 72 are respectively set inside the first unit 1 and the second unit 2, and the first gripper 42 and the second gripper 72 are respectively set inside the first double-diameter drum 4 and the second double-diameter drum 7; both the first gripper 42 and the second gripper 72 adopt a cam drive method.

[0048] The first gripper 42 and the second gripper 72 are used to stably grip the printing substrate during the printing process to prevent it from shifting or falling off. The clamping force of the first gripper 42 and the second gripper 72 can be finely adjusted according to the material and thickness of the printing substrate to avoid damaging the printing substrate. At the same time, the opening and closing actions of the grippers are synchronized with the rotation of the double-diameter drum to ensure the stability of the printing substrate during transfer.

[0049] The first double-diameter drum 4 and the second double-diameter drum 7 are both divided into two sides, A and B. When the first double-diameter drum 4 runs to side A, the first screen printing plate 41 moves in a straight line following side A. At the same time, the first double-diameter drum 4 rotates uniformly from side A to side B. When the printing on side A is completed, the first screen printing plate 41 starts to move in the opposite direction and returns to its original position. When the first double-diameter drum 4 rotates to side B, the substrate on side B is not printed.

[0050] When the first double-diameter drum 4 rotates to side B, the first screen printing plate 41 prepares for printing the next side A.

[0051] Embodiment 2:

[0052] This embodiment of the present invention discloses a high-speed screen printing machine in a flat-bed cylinder form. As shown in the attached Figure 1-2 figure, it includes a first unit 1, a second unit 2, a paper positioning system 3, a first double-diameter drum 4, a drying system 5, a second double-diameter drum 7, and a paper transfer drum 6;

[0053] The first unit 1 is arranged on the ground, and inside it there is a first screen printing plate 41, a first inkjet system 43, and a first squeegee 44;

[0054] The second unit 2 is arranged on the side of the first unit 1, and inside it there is a second screen printing plate 71, a second inkjet system 73, and a second squeegee 74;

[0055] The paper positioning system 3 is arranged at the feeding position of the first unit 1;

[0056] The first double-diameter drum 4 is arranged inside the first unit 1 and is located below the first screen printing plate 41;

[0057] The drying system 5 is arranged inside the first unit 1;

[0058] The second double-diameter drum 7 is arranged inside the second unit 2 and is located below the second screen printing plate 71;

[0059] The paper transfer drum 6 is arranged between the first double-diameter drum 4 and the second double-diameter drum 7.

[0060] The drying system 5 uses a UV circulation device to quickly dry the substrate. The UV circulation device integrates a PID temperature control module, with an air volume of 20m 3 / min, a temperature accuracy of ±2°C, and 40% energy saving compared to traditional infrared drying.

[0061] The temperature and wind speed of the drying system 5 can be adjusted according to the material of the substrate and the characteristics of the printing ink to ensure the best balance between the drying effect and the printing quality.

[0062] Inside the first unit 1 and the second unit 2, there are respectively driving structures for driving the first double-diameter cylinder 4 and the second double-diameter cylinder 7. The sheet transfer cylinder 6 is arranged inside the first unit 1 and the second unit 2, and inside the first unit 1 and the second unit 2, there is a driving structure for driving the sheet transfer cylinder 6. The driving structure uses an electric motor for driving.

[0063] The operations of the first unit 1 and the second unit 2 are staggered. When the A side of the first double-diameter cylinder 4 of the first unit 1 is being printed, the B side of the second double-diameter cylinder 7 of the second unit 2 is being printed. When the first double-diameter cylinder 4 of the first unit 1 rotates to the B side, it only serves as a sheet transfer function and does not print. The first screen plate 41 returns to the initial position. When the paper passes through the sheet transfer cylinder and reaches the B side of the second double-diameter cylinder 7 of the second unit 2, printing is carried out.

[0064] This high-speed screen printing machine in the form of a flat-bed cylinder press adopts the form of two units, namely the first unit 1 and the second unit 2, that is, the printing double-diameter cylinders composed of the first double-diameter cylinder 4 and the second double-diameter cylinder 7. Now the first double-diameter cylinder 4 and the second double-diameter cylinder 7 are evenly divided into two sides, A and B. When the first double-diameter cylinder 4 runs to the A side, the first screen plate 41 makes a following linear motion along with the A side. At this time, the first double-diameter cylinder 4 under the first screen plate 41 rotates uniformly from the A side to the B side. When the printing of the A side is completed, the first screen plate 41 starts to move in the opposite direction and returns to the initial position. When the first double-diameter cylinder 4 rotates to the B side, the substrate on the B side is not printed, and the first screen plate 41 makes preparations for printing the next A side. The printed substrate is dried by the drying system 5 and then passed through the sheet transfer cylinder 6 to the second unit 2, and is held by the second gripper 72 at the A side position of the second double-diameter cylinder 7 of the second unit 2. When the next substrate of the B side paper rotates over, the second screen plate 71 starts to follow and print the B side again. Similarly, because the paper on the A side has been printed, the second unit 2 uses the B side of the second double-diameter cylinder 7 for printing. Through this staggered printing method, the printing speed is doubled to 10,000 impressions per hour.

[0065] The present invention lies in adopting the flat-bed cylinder screen printing method, using two double-diameter cylinders, and printing alternately on the odd and even sides of two units, which can increase the screen printing speed to 10,000 impressions per hour. At the same time, by adopting the flat-bed cylinder method, the printing pressure is better.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0067] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-speed screen printing machine of round flattening type, characterized in that: include: A first machine unit (1) is arranged on the ground and is provided with a first screen plate (41), a first inkjet system (43) and a first scraper (44) therein; A second machine group (2) is arranged behind the first machine group (1), and is provided with a second screen plate (71), a second inkjet system (73) and a second scraper (74) therein; A paper positioning system (3) is arranged at the feeding position of the first machine unit (1); A first double-diameter roller (4) is arranged inside the first machine unit (1) and below the first screen plate (41); A drying system (5) is arranged inside the first machine unit (1); A second double-diameter roller (7) is arranged inside the second machine unit (2) and below the second screen plate (71); The paper transfer roller (6) is arranged between the first double-diameter roller (4) and the second double-diameter roller (7).

2. A high-speed screen printing machine of round flattening type according to claim 1, characterized in that: A first gripper (42) and a second gripper (72) are respectively arranged inside the first unit (1) and the second unit (2); the first gripper (42) and the second gripper (72) are respectively arranged inside the first double-diameter roller (4) and the second double-diameter roller (7).

3. A high-speed screen printing machine of round flattening type according to claim 1, characterized in that: The first double-diameter roller (4) and the second double-diameter roller (7) are each divided into two sides, A and B. When the first double-diameter roller (4) moves to side A, the first screen plate (41) follows side A to make a linear motion. At the same time, the first double-diameter roller (4) rotates at a constant speed from side A to side B. When the printing of side A is completed, the first screen plate (41) starts to move in the opposite direction to return to the initial position. When the first double-diameter roller (4) moves to side B, the substrate on side B is not printed.

4. A high-speed screen printing machine of round flattening type according to claim 3, characterized in that: When the first double-diameter roller (4) runs to the B side, the first screen plate (41) prepares for printing the next A side.

5. The high-speed screen printing machine of round flattening type according to claim 2, characterized in that: The first gripper (42) and the second gripper (72) are both driven by a cam.

6. A round flattening type high-speed screen printing machine according to claim 1, characterized in that: The drying system (5) uses a UV circulation device to quickly dry the printed material.

7. A round flattening type high-speed screen printing machine according to claim 1, characterized in that: The first machine unit (1) and the second machine unit (2) are provided with driving structures for driving the first double-diameter roller (4) and the second double-diameter roller (7) respectively.

8. A high-speed screen printing machine of round flattening type according to claim 7, characterized in that: The paper transfer cylinder (6) is arranged inside the first machine unit (1) and the second machine unit (2), and a driving structure for driving the paper transfer cylinder (6) is provided inside the first machine unit (1) and the second machine unit (2).

9. The high-speed screen printing machine of round flattening type according to claim 1, characterized in that: The first double-diameter roller (4) and the second double-diameter roller (7) are both suction rollers.

10. The high-speed screen printing machine of round flattening type according to claim 1, characterized in that: The first unit (1) and the second unit (2) work in an alternating manner. When the A side of the first double-diameter roller (4) of the first unit (1) is printed, the A side of the second double-diameter roller (7) of the second unit (2) is not printed. When the first double-diameter roller (4) of the first unit (1) runs to the B side, it only plays a paper transfer role and does not print. The first screen plate (41) returns to the initial position, and the paper is printed when it passes through the paper transfer roller and reaches the B side of the second double-diameter roller (7) of the second unit (2).

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