Machine head of seven-layer coextrusion high barrier film blow molding machine

Abstract

The invention relates to a machine head of a seven-layer coextrusion high barrier film blow molding machine, which comprises a core model, a flow passage tray, a connecting tray, a top tray, an inner neck mold, an outer neck mold, bolts and copper bars. A plane superposition machine head adopts a disc-shaped film design to ensure that superposed layers reach seven layers and U-shaped flow passages are fully distributed on each one of the superposed layers; a structure in which one part is divided into two parts, the two parts are divided into four parts, the four parts are divided into eight parts and the eight parts are combined into the four parts ensures that a material is heated more sufficiently; a computer centralized control detection system automatically adjusts the temperature to ensure that the material is not fluidized because the temperature of the machine head is over-high, so the flow property of the material is effectively improved; and the material is fed from a lateral surface to ensure that the material is uniformly distributed in the machine head and is heated uniformly, so the densities of extruded film products are consistent, and the flow passages in the machine head have fewer inflection points and have no dead corners.

Description

technical field [0001] The invention relates to an extrusion blow molding machine head for making a multilayer film, which is a double-helix plane 7-layer co-extrusion superposition type blown film machine head. Background technique [0002] With the development and progress of society, people's quality of life has been continuously improved, and the requirements for the performance of various plastic packaging films are also getting higher and higher. In the past, the head of the three-layer and five-layer co-extrusion blow molding unit still stays in the inclined flow channel head. The disadvantages are: there is a dead angle in the discharge of the head, and there is no melt pressure sensor, which causes blockage and is difficult to clean; Poor uniformity and uneven thickness; the compression density of the machine head is low, and the tensile strength and elongation at break of the product produced are low; the plasticity of the product is poor, and there are clouds, str...

AI Technical Summary

Problems solved by technology

In the past, the head of the three-layer and five-layer co-extrusion blow molding unit still stays in the inclined flow channel head. The disadvantages are: there is a dead angle in the discharge of the head, and there is no melt pressure sensor, which causes blockage and is difficult to clean; Poor uniformity and uneven thickness; the compression density of the machine head is low, and the tensile strength and elongation at break of the product produced are low; the plasticity of the product is poor, and there are clouds, streaks, and water lines; the output is low, and the air cooling system Slow cooling rate, slow cooling of bubbles

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