Film-drawing extruder die head with high safety

Abstract

The invention relates to a film-drawing extruder die head with high safety. The film-drawing extruder die head is characterized by comprising a die head body (1); the lower portion of the die head body (1) is connected with a chilling drum (2) through a pipe, anti-static wires (3) are arranged on the chilling drum (2), the side wall of the bottom of the die head body (1) is provided with a side seal (2.1), and a collecting device (4) is arranged under the side seal (2.1) and is used for collecting PET melt leaked from the side seal (2.1); the die head body (1) is connected to a melt pipe (5), the front and back ends of the die head body (1) are each adjacently connected with a steam pipe (6) which is connected with a steam leading-in pipe (7), and valves (8) are arranged at the connecting positions of the steam leading-in pipes (7) and the steam pipes (6); and meanwhile, a humidifier (9) is further fixed to the periphery of the die head body (1). By means of the film-drawing extruder die head with high safety, production stopping is not needed, and occurrence of a die lip line can be prevented.

Description

technical field [0001] The invention relates to a die head, in particular to a die head on a film stretching extruder, which is used for stretching PET melt into a film. Background technique [0002] The film drawing production process needs to use PET material to draw the film, and the PET material must first pass through the die of the film drawing extruder to carry out the drawing process. Usually, the side wall of the die head is relatively thin, and the side wall of the die head is easy to crack when the torque is applied, resulting in the leakage of the PET melt on the side of the die head, which drips onto the antistatic wire under the die head, causing production to stop and affecting the production. Work properly. In addition, it is necessary to stop the machine to cool down the side seal leaking material, and the processing time is relatively long, which affects the production efficiency; at the same time, when the film drawing production line is pulling the film,...

AI Technical Summary

Problems solved by technology

Usually, the side wall of the die head is relatively thin, and the side wall of the die head is easy to crack when the torque is applied, resulting in the leakage of the PET melt on the side of the die head, which drips onto the antistatic wire under the die head, causing production to stop and affecting the production. Work properly

In addition, it is necessary to stop the machine to cool down the side seal leaking material, and the processing time is relatively long, which affects the production efficiency; at the same time, when the film drawing production line is pulling the film, there are often lip lines on the surface of the film, and these lip lines will affect the film thickness and product quality. , especially in winter, the weather is cold and dry, and the lip line is more likely to appear. Sometimes the lip line will appear again within a day after cleaning the die head. It is necessary to clean the die head frequently, which not only wastes raw materials, but also affects production stability and product quality

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