What are the problems of plastic pipe equipment produced by extruder

Time:2020-10-27

Plastic pipe industry mainly uses extruder for extrusion molding production, plastic pipe is often round, different uses have certain requirements for the roundness of the pipe. We use extruder production line to produce plastic pipe section deformation trend is to a certain extent, but if the deformation of the deformed pipe is too large, the quality of the final product will be affected, which indicates that our production line has failed to carry out proper standard rounding treatment.

1. Elliptic deformation of pipe section

The ellipse deformation of plastic pipe indicates that the deformation is very large. Generally, the degree of ellipse deformation can be determined by ellipticity. Under normal circumstances, we will analyze the causes of this problem: the greater the bending angle, the smaller the bending radius, the larger the diameter, the thinner the pipe wall, and the greater the ellipticity. Our company’s technicians suggest that the bending radius of the pipe should be cold bending elbow, which should be more than 4 times of the nominal diameter and 3.5 times of the hot bending elbow.

2. Tube wall deformation

The problem of pipe wall deformation is very serious. The deformation of pipe wall will cause the pipe wall thickness to fail to meet the requirements of pipe production. It will not only affect the external surface quality and sales of plastic products, but also can not meet the actual physical pressure bearing capacity of the pipe because of the thinning of the pipe wall. If the unqualified pipe is used, it may break or reduce the service life. In short, the deformation of the outer tube wall is caused by the elongation and thinning of the outer tube wall. The farther away from the neutral layer, the more the tube wall elongates, so the more thin it becomes; the shorter and thicker the inner wall is. Generally, we can solve the problem by reducing the traction speed of the pipe or increasing the speed of the main extruder.

3. Wrinkling deformation of inner wall of tube

For example, when using extruder to produce PPR pipe with thin pipe wall, the inner pipe wall of the pipe will wrinkle when it receives the deformation pressure because the structural strength of the pipe wall is not stable enough. Therefore, the thinner the pipe wall is, the worse the structural stability of the pipe is, and the more prone it is to wrinkle deformation.

The above is our Huamei Plastic Machinery Co., Ltd. for your pipe production related information, hope to provide you with some help, if you have more needs, please call us for details or visit the factory on-site investigation of extruder and related production equipment, we will provide you with professional plastic extruder procurement advice and equipment technical guidance.

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