Knotless screen printing device

Abstract

The utility model provides a knotless screen printing device which comprises a knotless screen, a scraper component and a printing table. The knotless screen printing plate is composed of a screen frame and screen wires. The scraper component comprises a scraper base and a scraper, and the scraper is mounted on the scraper base; the mesh wires comprise transverse mesh wires parallel to the printing direction and longitudinal mesh wires perpendicular to the printing direction, and the included angle between the scraper and the longitudinal mesh wires is 5-70 degrees. According to the net-knot-free screen printing device, in the advancing process of the scraper, each point of the screen is subjected to stretching force in two directions, and it is avoided that when a net-knot-free screen is used for printing in a traditional printing mode, screen deformation is aggravated due to the fact that the screen in the vertical direction bears most force. Therefore, the printing life of the knotless screen printing plate is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar cell production and silk screen printing field especially relates to a knotless screen printing device. BACKGROUND

[0002] In recent years, it is increasingly difficult for the efficiency of the conventional process solar cell to be further improved. The ultra-fine grid solar cell technology can reduce the shading loss and further optimize the aspect ratio of the sub-grid line. With the continuous updating and upgrading of the conductive paste and printing equipment, the metallization of the ultra-fine grid solar cell is gradually becoming possible. However, with the decrease of the sub-grid line opening, the defects of the traditional screen mesh screen (diagonal tension screen) gradually become prominent, and the shielding disadvantage of the knot becomes more and more obvious, which begins to affect the trend of further narrowing of the ultra-fine grid printing and the sub-grid line opening. Therefore, the demand for knotless screen in the photovoltaic industry is increasingly strong.

[0003] The knotless screen adopts orthogonal weaving. Compared with the diagonal tension screen mesh printing, each point is pulled by two steel wires in the printing direction. The stress of the steel wire in the printing direction is much larger than that of the steel wire in the horizontal direction during the printing operation, which causes uneven stress of the steel wire, easy tensioning of the plate, deformation of the line width, and finally leads to the fact that the service life of the knotless screen is generally lower than that of the diagonal tension screen. Therefore, the prior art has defects. SUMMARY

[0004] To solve the problems in the prior art, the utility model provides a knotless screen printing device, which adjusts the angle of the doctor blade and the steel wire of the screen, reduces the tensioning phenomenon caused by uneven stress of the screen, and greatly improves the service life of the knotless screen.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A knotless screen printing device, which comprises a knotless screen, a doctor blade component and a printing table; the knotless screen is composed of a screen frame and a screen wire; the doctor blade component comprises a doctor blade base and a doctor blade, and the doctor blade is installed on the doctor blade base; the screen wire comprises a transverse screen wire parallel to the printing direction and a longitudinal screen wire perpendicular to the printing direction, and the doctor blade and the longitudinal screen wire form an angle of 5-70°.

[0007] Further, preferably, in the direction perpendicular to the movement direction of the doctor blade, the doctor blade and the longitudinal screen wire form an angle of 10-50°.

[0008] Further, the knotless screen printing device further comprises a ink return blade, which is arranged in front of the doctor blade in the printing direction; and the installation angle of the ink return blade is perpendicular to the movement direction thereof.

[0009] Further, the scraper base is one of iron material, steel material, or aluminum alloy material.

[0010] Further, the scraper is one of glass fiber or carbon fiber.

[0011] Compared with the prior art, the above design scheme is adopted in the utility model, so that every point of the screen gauze is subjected to the stretching force of two directions of screen wires during the movement of the scraper, and the deformation of the screen plate caused by the screen wires in the vertical direction bearing most of the force during the printing of the screen plate without screen knots in the traditional printing mode is avoided, so that the printing life of the screen plate without screen knots is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The present application is not limited by the accompanying drawings.

[0013] Fig. 1 is a partial structure schematic view of an embodiment of the screen plate without screen knots printing device provided by the utility model;

[0014] Fig. 2 is a top view schematic view of an embodiment of the screen plate without screen knots printing device provided by the utility model;

[0015] Fig. 3 is a top view schematic view of another embodiment of the screen plate without screen knots printing device provided by the utility model;

[0016] Fig. 4 is a top view schematic view of another embodiment of the screen plate without screen knots printing device provided by the utility model;

[0017] Fig. 5 is a top view schematic view of another embodiment of the screen plate without screen knots printing device provided by the utility model.

[0018] Explanation of the reference signs: screen plate without screen knots 1; screen frame 11; screen wire 12; scraper component 2; scraper base 21; scraper 22; ink return blade 3. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear and understandable, the utility model is further described in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and do not limit the utility model.

[0020] As shown in Figures 1-5, the utility model provides a kind of net knot screen printing device, it includes net knot screen 1, doctor blade component 2 and printing platform;The net knot screen 1 is composed of screen frame 11, screen wire 12;The doctor blade component 2 includes doctor blade base 21 and doctor blade 22, the doctor blade 22 is installed on doctor blade base 21;The screen wire 12 includes horizontal screen wire parallel with printing direction and longitudinal screen wire vertical with printing direction, the doctor blade 22 is 5-70 ° angle of inclusion with longitudinal screen wire.

[0021] Wherein, the doctor blade 22 is 10-50 ° angle of inclusion with longitudinal screen wire in priority;The net knot screen printing device further includes ink return blade 3, the ink return blade 3 is set in the front of doctor blade 22 along printing direction;The installation angle of the ink return blade 3 is perpendicular to its movement direction;The doctor blade base 21 is one of iron material, steel material or aluminum alloy material;The doctor blade 22 is one of glass fiber and carbon fiber.

[0022] As shown in Figures 2-4, the doctor blade 22 is 5-70 ° angle of inclusion with longitudinal screen wire multiple embodiment schematic diagram.

[0023] The utility model provides net knot screen printing device, make doctor blade in the course of travel, every point of net yarn has two directional screen wire to receive tensile force effect, avoid the net knot screen in traditional printing mode when printing vertical direction screen wire is subjected to most force and lead to screen deformation intensifies of net knot screen printing device. To greatly improve the printing life of net knot screen.

[0024] The above only is the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A webless screen printing apparatus, characterized by, The screen printing device without screen joint comprises a screen without screen joint, a scraper member and a printing table; the screen without screen joint is composed of a screen frame and screen wires; the scraper member comprises a scraper base and a scraper, the scraper is installed on the scraper base; the screen wires comprise transverse screen wires parallel to the printing direction and longitudinal screen wires vertical to the printing direction, the scraper forms an angle of 5-70° with the longitudinal screen wires.

2. The webless screen printing apparatus according to claim 1, characterized in that, The scraper forms an angle of 10-50° with the longitudinal screen wires.

3. The webless screen printing apparatus according to claim 1, characterized in that, The screen printing device without screen joint further comprises a return ink blade, the return ink blade is arranged in front of the scraper along the printing direction; the installation angle of the return ink blade is perpendicular to the movement direction of the return ink blade.

4. The webless screen printing apparatus according to claim 1, characterized by The scraper base is one of iron material, steel material or aluminum alloy material.

5. The webless screen printing apparatus according to claim 1, characterized in that, The scraper is one of glass fiber and carbon fiber.

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