PE plastic thin film preparation method

Abstract

The invention relates to a plastic thin film preparation method. Air ring cooling equipment is used in the preparation method, and the air ring cooling equipment comprises a mounting seat, a lifting device, air rings and a cleaning device. The specific method for preparing a plastic thin film by using the air ring cooling equipment comprises the following steps of plasticizing extrusion, blowing forming, air ring cooling, folding flattening and thin film coiling, and the cleaning device comprises a mounting frame, a connecting sliding block, a lifting air cylinder, a lifting plate, a first connecting rod, a cleaning brush, a second connecting rod, a driving mechanism, a connecting ring, convex teeth, a driving gear and a driving motor. According to the preparation method, the height of the air rings is properly adjusted through the lifting device so as to meet actual working requirements, the function of adjusting the height of the two air rings at the same time or adjusting the height of one air ring can be achieved without arranging a plurality of large driving pieces, after the air ring cooling equipment is used for a long time, air outlets of the air rings can be cleaned through the cleaning device, and pollution of dust and other impurities accumulated in the air outlet to film bubbles is avoided.

Description

technical field [0001] The invention relates to the field of plastics, in particular to a method for preparing a PE plastic film. Background technique [0002] PE film, that is, polyethylene film, refers to a film produced with PE particles. PE film has moisture resistance and low moisture permeability. According to different manufacturing methods and control means, polyethylene film can produce products with different properties such as low-density, medium-density, high-density polyethylene and cross-linked polyethylene. [0003] In the preparation process of PE plastic film, it is necessary to use the air ring to cool the film bubble, but the existing air ring has the following problems in the cooling process: [0004] (1) In order to improve the cooling efficiency of the air ring, double air ring cooling equipment appeared. In order to adjust the cooling position according to the actual characteristics of the film bubble to be cooled, the double air ring can be set as a...

AI Technical Summary

Problems solved by technology

[0004] (1) In order to improve the cooling efficiency of the air ring, double air ring cooling equipment appeared. In order to adjust the cooling position according to the actual characteristics of the film bubble to be cooled, the double air ring can be set as a height-adjustable structure, and in order to To adjust the height of the two air rings, it is often necessary to set up multiple cylinders or similar driving parts, and the investment cost is relatively high;

[0005] (2) When the air ring is used for a long time, impurities such as dust will accumulate in the air outlet. These impurities will be sprayed out with the cold air during the cooling process and adhere to the surface of the film bubble, which will affect the production quality of the film bubble. However, due to the small size of the air outlet, it is difficult for existing equipment to effectively clean it, and there are still impurities in the air outlet after cleaning

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