A solar cell composite material screen secondary stretching net reuse process

Abstract

The invention discloses a secondary screen tensioning and reusing technology of a solar cell sheet composite material screen plate. The technology comprises the following steps that an old screen plate is stripped, hot melt adhesive stripping is carried out on the screen plate needing to be reused by utilizing a plane stripping machine, so that a stainless steel wire mesh is separated from an oldpolyester screen; a combined false frame is manufactured, a new polyester screen and a fixing frame are prepared, the new polyester screen is adhered to the fixing frame, and the new polyester screenand the fixing frame are combined into the combined false frame; a new screen plate is manufactured, the stainless steel wire mesh stripped from the old screen plate is utilized for the second time, the stainless steel wire mesh is adhered to the polyester screen in the combined false frame through hot melt adhesive, and the polyester screen at the middle position of the stainless steel wire meshis removed, then an upper frame is bonded on the polyester screen, and the fixing frame in the combined false frame is removed. According to the technology, the stainless steel wire mesh of the screenplate can be secondarily tensioned and reused, the plate making cost is reduced, and the waste is reduced.

Description

technical field [0001] The invention relates to the technical field of screen printing screen plates for solar cell sheets, in particular to a secondary stretching and reuse process of screen plates made of solar cell sheet composite materials. Background technique [0002] Existing solar cell printing screens are made of composite materials, that is, expensive stainless steel screens are used in the central area of ​​the screen in the range of 200*200mm, and relatively cheap polyester screens are used in other areas. The joints are glued together with hot-melt glue. [0003] In the stretching process of the plate making process, once the normal stretching process is over, the screen tension and screen frame model are all fixed and cannot be changed, and in the plate making process, it is easy to cause the screen tension to attenuate, which is lower than the value required by the customer. Moreover, the stainless steel screen used in the existing solar cell sheet printing s...

AI Technical Summary

Problems solved by technology

[0003] In the stretching process of the plate making process, once the normal stretching process is over, the screen tension and screen frame model are all fixed and cannot be changed, and in the plate making process, it is easy to cause the screen tension to attenuate, which is lower than the value required by the customer

Moreover, the stainless steel screen used in the existing solar cell sheet printing screen is about 18-28 microns, which is very soft. The tension of the stretched stainless steel screen is attenuated or once the tension is lost, it will form a shrinking screen. The process can no longer be used for secondary stretching

In the prior art, in view of these defects, the screen plate can only be scrapped, resulting in very serious waste

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