A molding die for plastic drainage pipes

Abstract

The invention discloses a molding die of a plastic drainage pipe, belonging to the field of plastic drainage pipes, a plastic drainage pipe and a molding die thereof. In this solution, during the process of cooling and hardening molding of the plastic pipe in the cabin, because the inner The water mist curtain formed under the action of the atomizing nozzle fills all corners of the cabin, cooling the plastic pipe evenly, and some droplets adhering to the surface of the plastic pipe will be cleaned before leaving the cabin. The clusters are wiped and cleaned up, so that the surface of the plastic pipe is not easy to adhere to the water film when it leaves the cabin, and it is not easy to bring the cooling water to the working environment of the plastic pipe forming. The connection strength between the outer covering pipes makes the connection between the inner lining pipe and the outer covering pipe not easy to fall off, and the plastic drainage pipe obtained by compounding two different materials of the inner lining pipe and the outer covering pipe can achieve strength and safety. sexual demands.

Description

technical field [0001] The invention relates to the field of plastic drainage pipes, and more particularly, to a molding die for plastic drainage pipes. Background technique [0002] Plastic is a polymer compound that is made of monomer as raw material and polymerized by addition or polycondensation reaction. Its resistance to deformation is moderate, between fiber and rubber. It is one of the most common chemical materials in daily life. It can be divided into non-toxic plastics represented by pp and pe and micro-toxic plastics represented by pvc and eps according to whether it is toxic or not. Toxic plastics, for the consideration of water ecological safety, plastic drainage pipes generally need to use non-toxic plastics. [0003] Plastic drainage pipes with long dimensions are usually processed by extrusion molding. The molten plastic slurry is extruded by an extrusion device and cooled to a certain extent to form the embryonic shape of the plastic drainage pipe. , and ...

AI Technical Summary

Problems solved by technology

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a molding die for plastic drainpipes, which can realize cooling of the plastic drainpipes by changing the water jet spraying water column used in the water cooling process to use mist-like water curtains to cool the plastic drainpipes. Cooling, so that the plastic drainage pipe is not easy to respond to the uneven temperature drop during the forming and hardening process, resulting in the formation of thermal stress concentration in the plastic drainage pipe, and it is not easy to produce plastic drainage pipes with invisible defects

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