Mechanism for decreasing rejection rate of PVC double-wall corrugated pipe and method of mechanism

Abstract

The invention relates to the technical field of pipeline product production and application, in particular to a mechanism for decreasing the rejection rate of a PVC double-wall corrugated pipe and a method of the mechanism. According to the mechanism and the method, the structure is compact, and production operation is easier; gas-aided molding is conducted, and therefore an inner layer and an outer layer of a product can be combined more closely; innovative flow channel structure design is adopted, and the problems of production material burning, product yellowing and product cracking in use are solved; the mechanism and the method can be suitable for production of the same kind of PVC pipeline products, and the production rejection rate is decreased.

Description

Technical field [0001] The invention relates to the technical field of production and application of pipeline products, and more specifically, to a mechanism and method for reducing the waste rate of PVC double-wall corrugated pipes. Background technique [0002] The PVC double-wall corrugated pipe product is a double-wall composite structure. When the conventional mold produces pipes, a shunt shuttle is set in the middle of the mold body to split the inner and outer layers. Because the melt in the middle of the mold is gradually compressed, the pressure increases sharply, and the split is difficult to balance, and the product itself It is a thin product, it is easy to burn when the product is formed, and it is easy to appear yellow and crack after the product is formed. In addition, because the outer surface of the pipe is absorbed by the cooling and shaping, it may cause the inner and outer layers of the pipe to not fit closely, which may bring hidden dangers during installatio...

AI Technical Summary

Problems solved by technology

[0002] The PVC double-wall corrugated pipe product is a double-wall composite structure. When producing pipes with conventional molds, a shunt shuttle is set in the middle of the mold body to separate the inner and outer layers. Because the melt in the middle of the mold is gradually compressed, the pressure increases sharply, and the shunt is difficult to balance. And the product itself It is a thin-walled product, which is easy to burn when the product is formed, and is prone to yellowing and cracking after the product is formed

In addition, because the outer surface of the pipe is adsorbed by cooling and shaping, it may cause the inner and outer layers of the pipe to not fit closely, which will bring hidden dangers during installation and use.

Images