Thin film longitudinal stretching machine

Abstract

The invention discloses a thin film longitudinal stretching machine. The thin film longitudinal stretching machine comprises a rack; a preheating station, a stretching station and a shaping station are sequentially arranged on the rack from left to right; a plurality of working roller assemblies are arranged in the preheating station, the stretching station and the shaping station respectively, and all the working roller assemblies in the stretching station are collectively called as stretching roller assemblies; the stretching roller assemblies comprise a first stretching roller, a second stretching roller and a third stretching roller which are arranged in the left-right direction; the first stretching roller is rotatably connected with the rack; a second lifting mechanism is arranged onthe rack and drives the second stretching roller to move up and down; a third lifting mechanism is arranged on the rack, the third lifting mechanism drives the third stretching roller to move up anddown; and a maintaining assembly is further arranged on the rack and used for enabling a thin film to be attached to the second stretching roller and adjusting the size of a wrap angle between the thin film and the second stretching roller. The invention provides the longitudinal stretching machine capable of adjusting the size of the wrap angle between the thin film and the stretching roller.

Description

technical field [0001] The invention relates to the field of film stretching, in particular to a film longitudinal stretching machine. Background technique [0002] In the stretching device in the art, the air cylinder directly drives the holding roller up and down to drive the glue roller up and down. The working point of the glue roller and the second stretch roller is fixed, and the wrap angle of the stretch roller cannot be adjusted according to different film thicknesses. [0003] For example, the Chinese Patent Publication No. is CN204566670U's publication: "A Stretching Roller Set for Film Longitudinal Stretching". In this publication, its rubber pressing roller is a passive wheel, and the rubber pressing roller can move up and down, but the rubber pressing roller needs to be supported upward by the holding roller so that the rubber pressing roller presses the film on the stretching roller, and the holding roller and The rubber pressing rollers abut against each othe...

AI Technical Summary

Problems solved by technology

Moreover, if this method is adopted, the rubber pressure roller is likely to vibrate due to the vibration of the frame during the process of the up and down reciprocating movement driven by the holding roller, which may cause the rubber pressure roller to jump. Affect the quality of the produced film, which may cause problems such as uneven thickness of the film

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