Bidirectional drawing machine for polymide films

Abstract

The invention provides a bidirectional drawing machine for polymide films; the bidirectional drawing machine comprises a needle plate type chain mechanism, a drawing machine box body, a vertical chain and transmission mechanism, an automatic expanding mechanism, an automatic closed loop heating system and an inner circulating air bellows, wherein the vertical chain and transmission mechanism comprises a main driving motor, a belt pulley, a main shaft, a guide key and a chain wheel; the automatic expanding mechanism comprises a speed reducing motor, a small chain wheel, a breadth adjusting screw rod, a nut and a sliding seat; the electric heating system comprises an embedded type electric heater, a temperature sensor, a temperature controller and an upper computer; by adopting the bidirectional drawing machine, the films are uniformly stressed during stretching and have consistent thickness and high quality, the space of a heating area is reduced, the heating power is minimized, the electric energy is saved, and the exhaust emission is reduced; and therefore, the bidirectional drawing machine is more environmental-friendly.

Description

Technical field [0001] The invention relates to a plastic machine, in particular to a film bidirectional stretching machine. technical background [0002] Polyimide film is a new type of high temperature resistant organic polymer film, which is formed by polycondensation of pyromellitic dianhydride and diaminodiphenyl ether in a very strong solvent dimethylacetamide and then salivated. imidized. It is currently the best film insulating material in the world, with excellent mechanical properties, electrical properties, chemical stability, high radiation resistance, high temperature resistance and low temperature resistance -269°C to +400°C. In 1959, DuPont Company of the United States first synthesized aromatic polyimide. In 1962, it tried to make a polyimide film (PI film). In 1965, it began production. The brand name is KAPTON. At the end of the 1960s, my country could produce polyimide films in small batches, mainly producing unidirectional films. In recent years, the b...

AI Technical Summary

Problems solved by technology

Due to its good comprehensive performance, its use has gradually expanded, and it has been widely used in aviation and navigation. However, due to the high requirements for the production equipment of polyamide biaxially stretched films, continuous heating is required, and general biaxially stretched machines cannot Production, and high energy consumption, expensive products, can not meet the needs of the domestic market

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