Multi-stage temperature control machining and forming device and machining method for PVC-O tube

Abstract

The invention discloses a multi-stage temperature control machining and forming device for a PVC-O tube. The multi-stage temperature control machining and forming device comprises an extruder, a cooling device, a traction apparatus and an expansion mandrel; the right side of the head of the extruder is provided with a first cooling device; the end, close to the head of the extruder, of the first cooling device is provided with a fixed-diameter sleeve; the other side of the first cooling device is provided with a first traction apparatus; the end, far away from the first cooling device, of thefirst traction apparatus is provided with the expansion mandrel; the expansion mandrel is positioned inside a water tank; the water tank is divided into a region I, a region II and a region III by using heat insulating plates; the inside of the expansion mandrel is of a hollow core structure; the expansion mandrel is divided into a first cylinder, a cone and a second cylinder by virtue of the heatinsulating plates; a hollow connecting rod is arranged inside the expansion mandrel; the expansion mandrel is connected with the head of the extruder through the hollow connecting rod; the end, far away from the first traction apparatus, of the expansion mandrel is provided with a second cooling device; and the end, far away from the expansion mandrel, of the second cooling device is provided with a second traction apparatus. The multi-stage temperature control machining and forming device disclosed by the invention solves the problem that the wall thickness of the tube is not uniform, and guarantees the quality of a tube blank.

Description

technical field [0001] The invention relates to the field of PVC-O pipe processing equipment, in particular to a PVC-O pipe multi-stage temperature-controlled processing molding device and processing method. Background technique [0002] PVC-O pipe is the latest evolution form of PVC pipe. The pipe manufactured by special orientation processing technology is generally PVC-U pipe produced by extrusion method for axial stretching and radial stretching, so that the The long-chain molecules are regularly arranged in biaxial orientation to obtain a new type of PVC pipe with high strength, high toughness, high impact resistance, and fatigue resistance. The performance is far superior to ordinary PVC-U pipes. PVC-O pipes can greatly save raw material resources and reduce cost, improve product performance, and have obvious economic and social benefits. [0003] The production process of PVC-O pipe is mainly divided into one-step method and two-step method. The production efficiency...

AI Technical Summary

Problems solved by technology

[0003] The production process of PVC-O pipe is mainly divided into one-step method and two-step method. The production efficiency of PVC-O pipe produced by two-step method is relatively low. The degree and tolerance are also difficult to control, the scrap rate is high, and the orientation degree of the produced pipes is difficult to guarantee

The PVC-O pipe obtained by the existing one-step production process has the problem of uneven wall thickness, which seriously affects the service strength of the pipe

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