A pvc-o pipe radial stretching device and its processing method

Abstract

A PVC-O pipe radial stretching device and a processing method thereof belong to the field of PVC-O pipe processing equipment. It is characterized in that: the processing cylinder (4) is equipped with a heating device, a stretching mechanism (5) for radially stretching the PVC-O pipe body (7) and a compression mechanism for pressing the PVC-O pipe body (7) (6), the spreading mechanism (5) is axially installed in the processing cylinder (4), the pressing mechanism (6) is arranged on the processing cylinder (4), and the inner end passes through the processing cylinder (4) and is close to the spreading mechanism ( 5), the PVC‑O pipe body (7) is set between the expansion mechanism (5) and the compression mechanism (6). In the processing method, the pipe body stretching and the pipe body limit device are used at the same time, the PVC‑O pipe body is set between the expansion mechanism and the compression mechanism, and the compression mechanism cooperates with the expansion mechanism to force it to expand according to the expansion mechanism. The stretching direction of the mechanism uniformly stretches and expands, and the invention effectively ensures the overall uniformity of the radial stretching of the pipe body and ensures the use strength of the pipe.

Description

technical field [0001] A PVC-O pipe radial stretching device and a processing method thereof belong to the field of PVC-O pipe processing equipment. Background technique [0002] Biaxially oriented polyvinyl chloride (PVC-O) is the latest evolution of PVC pipes. The pipes manufactured by special orientation processing technology are generally PVC-U pipes produced by extrusion method for axial stretching and radial stretching. Stretching, so that the PVC long-chain molecules in the pipe are regularly arranged in the biaxial direction, and a new type of PVC pipe with high strength, high toughness, high impact resistance, and fatigue resistance is obtained. The performance is far superior to that of ordinary PVC-U pipes. Research and development of PVC-O Pipes can greatly save raw material resources, reduce costs, improve product performance, and have obvious economic and social benefits. [0003] PVC is a non-crystalline, amorphous plastic. Since the chlorine in the molecule ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the axial stretching of PVC-O pipes is easy to realize, but there are certain technical problems in the realization of radial (that is, hoop) stretching. The expansion of the existing radial expansion device is due to the The defects of its own structure cannot guarantee the uniformity of the overall expansion of the pipe, so that the stretched pipe has uneven wall thickness and easy deformation of the pipe body, which seriously affects the service strength of the pipe.

Images