Film guiding device of film threading system of film longitudinal drawing machine and running method of film guiding device

Abstract

The invention relates to a film guiding device of a film threading system of a film longitudinal drawing machine and a running method of the film guiding device. Film guiding clamps are mounted on a film threading chain plate, a vertical portion of an L-shaped fixed plate of each film guiding clamp is fixedly connected with the chain plate, the bottom surface of each inverted-n-shaped clamp body is positioned on the bottom surface of a horizontal portion of the corresponding fixed plate, and the lateral side of each clamp body extending above the corresponding fixed plate is connected with the horizontal portion of the corresponding fixed plate by a spring. When the clamp bodies are free of stress, the bottom surfaces of the clamp bodies cling to the horizontal portions of the fixed plates under action of the springs. Releasing plates controlled by cylinders are mounted above film threading chains at an entrance of the longitudinal drawing machine, and piston rods of the cylinders are mounted on mounting plates downwards. The running method of the film guiding device includes that when the film guiding clamps advance to positions below the releasing plates, the film threading chains stop, the cylinder act, the releasing plates press the film guiding clamps to release the same, and then close to clamp a thick film after the thick film is placed in the film guiding clamps, the film threading chains advance to drive the thick film to reach an exit of the longitudinal drawing machine, so that the thick film is drawn out from the film guiding clamps. The film guiding clamps act synchronously, the thick film is clamped accurately, quickly and simultaneously, and accordingly reliability in clamping and convenience in operation are achieved.

Description

technical field [0001] The invention belongs to the technical field of film stretching equipment, and in particular relates to a film guiding device and an operating method of a film threading system of a film longitudinal stretching machine. Background technique [0002] At present, the sheet threading system of the longitudinal stretching machine in the known film stretching equipment is mainly that the sheet threading chain on one side is installed along the ends of the plurality of rollers through which the sheet will pass. When threading the sheet, tie one side of the end of the slab to be stretched to the chain with a cord, press the start button at the entrance of the longitudinal stretching machine, the chain drives the slab to run, when the slab passes through each The roller is brought to the exit of the longitudinal stretching machine. When leaving the cooling roller, press the stop button at the exit of the longitudinal stretching machine to stop the chain, cut t...

AI Technical Summary

Problems solved by technology

[0003] This manual method and clips are complicated to operate, low in efficiency, and easy to remove the film during the threading process, which affects the quality of the film threading and the stability and reliability of the longitudinal stretching machine, and also reduces the automation of the entire longitudinal stretching equipment.

In addition, the current guide system uses a single row of chains, the operation process is not stable, and the reliability is not high

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