Stacked sizing sleeve for plastic pipe production

Abstract

The invention aims to provide a stacked sizing sleeve for plastic pipe production, which can effectively solve the problems of complicated assembly / disassembly process, high production cost and the like in the prior art. The stacked sizing sleeve for plastic pipe production comprises two or more classification and sizing sleeves connected together, wherein a connection device is arranged between two adjacent classification and sizing sleeves; and the central axes of two adjacent classification and sizing sleeves are collinear. According to the invention, various plastic pipes which have different wall thicknesses or are made of different raw materials can be produced by using one length-variable sizing sleeve, and the deformation of the outer diameter of the pipe is prevented at the same time; the workload in the production as well as the production cost is reduced; and moreover, the stacked sizing sleeve also has a plastic pipe blank pre-cooling function.

Description

technical field [0001] The invention relates to a sizing sleeve for producing plastic pipes, in particular to a stacked sizing sleeve for producing plastic pipes. Background technique [0002] In the plastic pipe production process, the polymer raw materials in the molten state are generally injected into the plastic pipe mold to obtain an unshaped high-temperature plastic pipe blank, and the plastic pipe blank enters a vacuum box to cool and solidify. There is a sizing sleeve at the entrance of the vacuum box to shape the plastic tube blank, thereby determining the inner diameter and wall thickness of the tube. When the production raw material changes, the shrinkage rate of the plastic pipe will also change. The inner diameter and length of the ordinary sizing sleeve are fixed, so the outer diameter of the plastic pipe will change, which cannot meet the product requirements, so it needs to be replaced. Sizing sleeve. When the factory needs to produce plastic pipes with di...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a superimposed sizing sleeve for the production of plastic pipes, which can effectively solve the problems of troublesome disassembly and installation and high production costs in the prior art.

Images