A manufacturing method of automobile glass heater wire printing screen plate

Abstract

The invention relates to a manufacturing method of an automobile glass heater wire printing screen plate, comprising the following steps: (1) manufacturing a bottom film; (2) tensioning a net; (3) performing alignment; 4)pasting the covering substrate; (5) photoresist coating; (6) drying; (7) exposure; (8) development; and (9) post-processing. Compared with the prior art, the method has the following advantages: A subbar and a bus bar are arranged on the same printing plate to produce a thickness difference between the two area of the photoresist, the thickness difference generated by the silver paste lay between the glass sub-bar and the bus bar area after glass printing is achieved, the temperature of each part of the glass is stable, At that same time, the invention can prevent the heatfrom generating at the welding joint of the bus bar from burning the silver paste, damaging the wrapping edge bar and causing burns of personnel, and can also meet the requirement of heating power differentiation of different parts of automobile glass.

Description

Technical field: [0001] The invention relates to a method for manufacturing a silk screen printing screen, in particular to a method for manufacturing an automobile glass heating wire printing screen. Background technique: [0002] Screen printing, in short, is to weave silk, synthetic fiber or metal wire into a net, stretch it tightly on the screen frame, and make a screen by manual engraving or photochemical plate-making. The principle of screen printing Yes: Utilize the photochemical changes of the photosensitive glue, that is, the light-receiving part of the photosensitive glue is cross-linked and hardened and firmly combined with the screen to form a plate film, and the unphotosensitive part is rinsed and developed with water or other developing solutions to form through holes, and the screen is made . The pattern part on the screen has through holes that allow ink to pass through, while the meshes of the non-graphic part are all blocked and ink cannot pass through. D...

AI Technical Summary

Problems solved by technology

Different positions of a piece of automotive glass have different requirements for heat generation, especially the position of the welding tongue at the busbar, that is, the welding joint is determined according to the wiring harness of the car. If the position is unreasonable, it will easily cause the heat in this area to exceed the standard. In order to reduce the temperature in these areas, It is necessary to increase the thickness of the silver paste at the busbar under the condition of defrosting and defogging, so as to prevent the silver paste from being burned by excessive heat and damage the car interior

Since the thickness of the sub-lines and busbars printed by a single screen in screen printing is the same, in order to achieve the purpose of ensuring the heating temperature of the sub-line area and reducing the temperature of the busbar area, the current conventional method is to use Two printing equipments repeat the printing of the busbar twice to increase the thickness of the silver paste at the busbar and reduce the resistance value at the busbar. However, it is extremely cumbersome to use this process of printing once in production and then printing a thicker busbar. Adding a process brings risks to the yield rate, and also increases the input of equipment, manpower, and material resources, thereby increasing the manufacturing cost of glass

[0004] In order to solve the above problems, the Chinese invention patent CN201410432833.5 discloses a method of screen printing of automobile glass heating wire and its printing screen, which is used to print and form metal heating wires and / or welding heads with different thicknesses on the inner surface of automobile glass , the method includes the following steps: S1, plate making: making the metal heating wire and / or welding head that needs to be printed into a screen screen; S2, clamping: fixing the automobile glass that needs to be printed on the printing table; and making the main The printing part is kept basically horizontal; S3, printing: use the scraper to scrape the screen to print the metal heating wire and / or welding head to be printed on the inner surface of the automobile glass to be printed; where before printing, the On the side of the screen facing the automobile glass that needs to be printed, a number of mesh patches need to be printed on the position of the thickened metal heating wire and / or the welding head; The problem that the printing thickness of the metal heating wire and welding head cannot be adjusted

However, this method actually has the following problems in the screen operation: 1. A large number of mesh patches can only be manually set, resulting in uneven bonding of the mesh patches, and poor positioning of the bonding position; 2. Mesh stickers The meshes of the sheet and the screen are different, and the holes are easy to interfere and overlap, so that the screen is easy to block when printing the heating line, and the heating line printed at the junction of the mesh patch and the heating line is prone to breakage

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