Multi-layer laminating counter-rotating blown film device

Abstract

The invention discloses a multilayer laminated counter-rotating blown film device, and relates to the technical field of plastic film production equipment, the multilayer laminated counter-rotating blown film device comprises an inner rotating core mold, and the inner rotating core mold is internally provided with an air channel penetrating through the whole inner rotating core mold; the outer rotating mold ring is sleeved outside the inner rotating core mold, and a gap is formed between the outer rotating mold ring and the inner rotating core mold so as to form a melt runner; the driving assembly comprises an input gear, an internal rotation transmission gear connected with the internal rotation core mold and an external rotation transmission gear connected with the external rotation mold ring, one side of the input gear is meshed with the internal rotation transmission gear to drive the internal rotation core mold to rotate, and the other side of the input gear is meshed with the external rotation transmission gear to drive the external rotation core mold to rotate. And therefore, the inner rotating core mold and the outer rotating mold ring can rotate in different directions. According to the invention, the anisotropy of a plastic blow-molded film with high orientation degree is reduced, so that the film tends to be isotropic, the stability of a melt runner gap of a blow-molded film molding die is improved, and the thickness uniformity of the film is improved.

Description

technical field [0001] The invention relates to the technical field of plastic film production equipment, in particular to a multi-layer laminated counter-rotating blown film device. Background technique [0002] The principle of plastic film forming is to press the viscous melt from the front end of the screw extruder into the die, so that the melt is extruded into a tube embryo through the die, and the tube is blown by the compressed air from the bottom of the die. The embryo is blown uniformly and freely into a film with a larger diameter, and at the same time, the tubular film is stretched longitudinally during the upward traction process, then flattened by the herringbone plate, pulled by the traction roller, and finally wound into a tube. However, this traditional blown film forming equipment has anisotropy for plastics with a high degree of orientation, such as thermotropic liquid crystal polymers (LCP for short), and the anisotropic properties of the films are quite ...

AI Technical Summary

Problems solved by technology

However, this traditional blown film forming equipment has anisotropy for plastics with a high degree of orientation, such as thermotropic liquid crystal polymers (LCP for short), and the anisotropic properties of the films are quite different. , often cannot meet the practical engineering application

In addition, the gap between the melt channel of the blown film forming die is unstable, resulting in uneven film thickness, and even affecting the stability or continuity of production

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