Plastic pipe bending process

Abstract

The invention discloses a plastic pipe bending process and belongs to the technical field of plastic pipe machining. An energy-saving anti-pulling pipe set used in cooperation with the process is adopted in the plastic pipe bending process, and by arranging the energy-saving anti-pulling pipe set, the use amount of hot sand can be remarkably reduced, heat waste is reduced, the energy-saving and environment-friendly performance is improved, and a PVC pipe which is heated and softened can be effectively prevented from being stretched and deformed in the moving process. When the PVC pipe is heated by hot sand, a hot soft filling body in the energy-saving anti-pulling pipe set can be heated and softened, so that when the PVC pipe which is heated and softened is bent, the hot sand can extrude and push a movable heat insulation block to counteract extrusion from the PVC pipe, so that deformation of the PVC pipe caused by mutual extrusion between the hot sand and the PVC pipe is prevented, and the working quality of bending machining can be effectively improved. The hot soft filling body can be cooled and hardened in an original state after bending is completed, so that the energy-saving anti-pulling pipe set can be repeatedly used, and the practicability is greatly improved.

Description

technical field [0001] The invention relates to the technical field of plastic pipe processing, and more specifically, relates to a plastic pipe bending process. Background technique [0002] Plastic pipes are generally made of synthetic resin, that is, polyester, added with stabilizers, lubricants, plasticizers, etc., and extruded in a pipe making machine by a "plastic" method. It is mainly used for water supply system piping, drainage, exhaust and sewage sanitary pipes, underground drainage pipe systems, rainwater pipes, and threading pipes for wire installation in housing construction. [0003] PVC pipe is a kind of plastic pipe, and it is also a synthetic material widely used in the world today. Its main component is polyvinyl chloride. In some usage scenarios, the PVC pipe needs to be bent, that is, the PVC pipe needs to be bent. Pour a large amount of high-temperature hot sand into the PVC pipe to soften the entire PVC pipe, and then put the softened PVC pipe into a ...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned process of bending PVC pipes with hot sand has the following advantages: the hot sand can heat the PVC pipe evenly, and the filling of the hot sand can make the bending of the pipe difficult to deform, but it also has the following disadvantages: first, For some PVC pipes that only need to be bent at a certain part in the middle, pouring a large amount of hot sand to soften the entire pipe will cause waste of heat, especially for long PVC pipes. Secondly, after the pipe is softened, put it into During the mold, the pipe is easily stretched and deformed, which needs to be improved

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