Folding type wide film extrusion die design method

Abstract

The invention discloses a folding type wide film extrusion die design method which comprises an upper die and a lower die. At a die closing state, a flow distributor holding chamber on the front part and a V-shaped runner chamber on the back part are formed between the upper die and the lower die; a flow distributor is clamped and fixed into the flow distributor holding chamber; a circular blind hole chamber is arranged in the front part of the flow distributor; the V-shaped fishtail-type runner chamber is arranged on the back part of the flow distributor; the front end of the V-shaped fishtail-type runner chamber communicates with the circular blind hole chamber; the back end of the V-shaped fishtail-type runner chamber communicates with the front end of the V-shaped runner chamber; a die extrusion port is formed in the back end surface, passing through the upper die and the lower die, of the back end of the V-shaped runner chamber; and an extrusion port is formed in the front end surface, communicating with the upper die and the lower end, of the front end of the circular blind hole chamber. According to the folding type wide film extrusion die design method provided by the invention, an extrusion melt body is innovatively designed to be of a V-shaped folding type structure at a pre-forming section and a forming section, and the dimension of a die along a width direction is reduced, so that the difficulty in casting and designing the die is reduced.

Description

technical field [0001] The invention relates to a wide-width film extrusion technology, in particular to a design method of a folded wide-width film extrusion die. Background technique [0002] The conveyor belt is the traction and carrying part of the belt conveyor, which can transport materials such as lumps, powders and pieces, and is widely used in large-scale continuous transportation of coal, mining, metallurgy, chemical industry, construction and transportation. production line. Usually, at a given belt speed, the transport capacity of the belt conveyor increases with the increase of the width of the conveyor belt. When the conveyor belt runs at high speed, it needs to be stable, so that the large pieces of the lumpy and powdery mixture will not be transported close to each other. The edge of the belt, resulting in serious spilling phenomenon. [0003] The rubber conveyor belt has the characteristics of high elasticity, impact resistance, heat resistance and corrosi...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention proposes a design method of a folding wide-width film extrusion die to solve the problems of high casting and design difficulty, high manufacturing cost and extrusion rate deviation control in the existing wide-width extrusion die design Difficulty and other issues

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