Precooling apparatus of plastic tube product line

Abstract

The invention discloses a pre-cooling device of a plastic tubular product manufacture line, which includes a shell with a sandwich; the inlet end of a material circulating channel in the inner cavity of the shell is communicated with the material outlet of a handpiece finish mold; the outlet end is communicated with the inlet of a sizing sleeve; the two ends of the sandwich of the shell are closed; the sandwich of the shell and the two end surfaces of the sandwich form the refrigerating channel of the pre-cooling device; a refrigerant inlet on the refrigerating channel is arranged on the refrigerating channel near the end of the handpiece finish mold; the outlet is arranged on the refrigerating channel near the end of the sizing sleeve. The pre-cooling device of the invention has the advantages that a high temperature material blank extruded from the handpiece finish mold is cooled by the pre-cooling device of the plastic tubular product manufacture line; therefore, the temperature of the extruded material blank is reduced and the material blank is contracted; the outer diameter of the material blank is almost consistent with the inner diameter of the sizing sleeve, thus being easier to enter the sizing sleeve, reducing the heat transferring action between the material blank and the sizing sleeve and avoiding the problems of over-heating of the sizing sleeve and blocking of the material blank from happening; thereby effectively improving the manufacture speed of the plastic tubular product manufacture line and stabilizing the manufacture.

Description

technical field [0001] The invention relates to a plastic pipe production line, in particular to a precooling device for a plastic pipe production line. Background technique [0002] The existing plastic pipe production line is mainly composed of a blanking device, an extruder, a nose die, a sizing sleeve device, a vacuum box, a tractor, a cutting machine, and other equipment. The cylindrical blank is then cooled by the sizing sleeve and vacuumized, so that the cylindrical blank is cooled and shaped to meet the specified size requirements. In this way of assembly line, after the billet exits the mold, it directly enters the sizing sleeve for cooling and sizing. Since the temperature of the billet just after exiting the mold is generally about 200 degrees, and the billet of the export mold has a certain degree of expansion, it is often The sizing sleeve will heat up quickly, greatly affecting the normal cooling and shrinkage of the billet, affecting the normal traction of th...

AI Technical Summary

Problems solved by technology

The existing method can only be improved by controlling the raw material formula and production process, so the appearance of the pipes produced in this way can basically only achieve matt brightness, and it is difficult to achieve a good gloss effect like a mirror surface

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