Two-way stretching equipment for PTFE ultra-fine filtering membrane production

Abstract

The invention relates to two-way stretching equipment for PTFE ultra-fine filtering membrane production. The two-way stretching equipment comprises an expanding machine and a winding mechanism arranged at the discharging end of the expanding machine, the expanding machine comprises a machine frame and a drying oven, the machine frame is provided with a pair of conveying chains clamping the two sides of a film to convey the film to penetrate through the drying oven, the return stroke ends of the conveying chains are located on the outer side of the drying oven, a plurality of sections of cooling boxes are arranged on the outer sides of the return stroke ends of the conveying chains, each section of cooling box is connected with a suction pipe, the suction pipes are connected with cooling fans, a secondary cooling box is arranged on the outer side of the forward stroke end of the conveying chain at the front end of the drying oven, blowpipes blowing towards the conveying chain are arranged on the front side and the rear side of the secondary cooling box, and the blowpipes are connected with blowing fans. The return stroke ends of the conveying chains on the expanding machine are arranged on the outer side of the drying oven, and then the cooling boxes arranged at the return stroke ends of the conveying chains are matched, so that the temperature of the conveying chains can be reduced through air suction cooling, and the expanding quality of products is improved.

Description

technical field [0001] The invention belongs to the technical field of film production, and in particular relates to a bidirectional stretching equipment for producing PTFE ultrafine filter membranes. Background technique [0002] PTFE ultra-fine filter membrane is prepared by biaxial stretching method, and is mainly used in chips, semiconductors, electronics and other environments that require very clean. It belongs to a high-precision product, and its filtration accuracy can reach more than 99.9995% under the particle detection condition of 0.1um. In the production process of PTFE ultra-fine filter membrane, an expander is needed to stretch the short PTFE filter membrane in the oven, so that It is made of PTFE ultra-fine filter membrane, but the current expander is to put the chain clamping the two ends of the filter membrane in and out of the oven, which causes the chain to stay in the oven for a long time. After a long time, the temperature of the chain will be greatly h...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of bidirectional stretching equipment for producing PTFE ultra-fine filter membrane, so as to solve the problem that the temperature of the current expander chain is too high, resulting in unqualified products, and the winding mechanism needs to be manually unfolded at both ends, which not only wastes manpower, but also Labor-intensive problems

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