PVC-O (oriented polyvinyl chloride) pipe magnetic suction controlled radial stretching device and processing method thereof

Abstract

The invention discloses a PVC-O (oriented polyvinyl chloride) pipe magnetic suction controlled radial stretching device and a processing method thereof and belongs to the field of PVC-O pipe processing equipment. The device is characterized by comprising a processing cylinder (4) transversely mounted on work benches (1), a heating device arranged on the inner side of the processing cylinder (4), an expanding mechanism (5) axially mounted in the processing cylinder (4) and used for radially stretching a PVC-O pipe (7) as well as a pressing mechanism (6) arranged on the processing cylinder (4), wherein the inner end of the pressing mechanism (6) penetrates through the processing cylinder (4) and is close to the expanding mechanism (5) to radially position the PVC-O pipe (7). The device is simultaneously provided with pipe stretching and limiting devices, the PVC-O pipe is arranged between the expanding mechanism and the pressing mechanism in a sleeving manner and matched with the expanding mechanism through the pressing mechanism, so that the pipe is uniformly stretched and expanded in the stretching direction of the expanding mechanism, the overall uniformity of radial stretching of the pipe is effectively guaranteed, and the use strength of the pipe is guaranteed.

Description

technical field [0001] A PVC-O pipe magnetic suction control 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 ...

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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 problems such as uneven wall thickness and easy deformation of the pipe body, which seriously affects the service strength of the pipe.

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