Method for flattening backing of wind-uproll in thin film production

Abstract

The invention relates to a method for flattening backing of a wind-uproll in thin film production. The method includes that a watering can is arranged near the upper right of a roller to be changed when a winder frame is at a lap changing position and also includes the following steps: a, when rolling to a preset length, the winder frame rotates clockwise by 300-330 degrees and stops at the lap changing position; b, the watering can sprays water evenly at the upper right of the roller to be changed, so as to cause a thin film to be clung on the roller to be changed; c, the winder frame contrarotates by 120-150 degrees, the roller to be changed arrives at a rolling position and the wind-uproll arrives at a lap dismounting position, the wind-roll is dismounted, and a roller is mounted for anext periodic operation. The invention has simple operation and high safety rate, backing of the wind-uproll is flat, and yield and efficiency of the thin film production are improved.

Description

A method of flattening the bottom of winding roll in film production technical field The invention relates to a film production method, in particular to a method for rolling and flattening the film during film production. Background technique Polyester film is widely used in various fields due to its good mechanical properties, thermal properties and chemical inertness. Biaxial stretching method is the main production method of polyester film. The production process of the biaxially oriented polyester film is as follows: the polyester chip is crystallized and dried to reduce its moisture content to below 50ppm, and the dried polyester chip enters the extruder to melt into a polyester melt, and filters out impurities through a filter. The melt metered by the metering pump flows from the die into sheets to the casting rollers, and is rapidly cooled into thick sheets without shape. The thick sheets are stretched 3 times after being preheated by the preheating rollers of the...

AI Technical Summary

Problems solved by technology

However, the pressing hand is easy to get involved in the film, which will cause personal equipment safety accidents

In order to ensure that the winding shaft core is flat and flat during winding, some companies use compressed air to blow the film when changing rolls, so that the film head is close to the shaft core to be replaced, but this method does not affect the blowing angle of compressed air. The requirements are relatively high. In addition, a large amount of compressed air is easily involved in the film layer. The first few layers of the film on the reeling master shaft have a lot of air involved, and the winding is not tight, causing the film to slip on the axis and cause scratches and shrinkage. roll folds

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