A foam pipe extrusion die with good layering effect

Abstract

The invention relates to a forming pipe extruding die with good layering effect, comprising an opening die extending transversely, and a core die arranged in the opening die, wherein a tubular gap between the opening die and the core die becomes a slurry channel; a core shaft extending transversely is arranged on an axial line of the core dire; columnar support rods for connecting the core shaft with an outer wall of the opening die are arranged in the middle of an axial direction, wherein at least one support rod is a baffling core with a rhombic cross section; and a diagonal line of the rhombic cross section goes along a slurry flowing direction. The foaming pipe extruding die provided by the invention is provided with the baffling core having the rhombic cross section in the slurry channel, and has good buffer action on passage of layered slurry instead of traditional square support rods so as to ensure layering effect between a pipe main body and a foaming layer, and increase quality of foaming pipes.

Description

technical field [0001] The invention relates to a die for manufacturing plastic pipes, in particular to an extrusion die for manufacturing foam pipes. Background technique [0002] The production line of PVC foam pipe or PE foam pipe is composed of feeding die, extrusion die and other auxiliary mechanical equipment. The foam pipe material includes a tubular body and an annular foam layer arranged in the middle of the body. The pipe material slurry is compressed and molded through the gradually narrowed slurry channel in the extrusion die, usually with radially extending support rods in the channel, because the tube material slurry of the foamed tube includes the body slurry and the body slurry wrapped in the body For the foamed slurry in the slurry, when the slurry flows, it will inevitably meet the support rods, and the poor mixing of the main slurry and the foamed slurry will easily occur, which will make the foamed tubes obtained from the manufacture unclear. product ra...

AI Technical Summary

Problems solved by technology

The tube material slurry is compressed and formed through the gradually narrowed slurry channel in the extrusion die, and radially extending support rods are usually provided in the channel, because the tube material slurry of the foamed tube includes the body slurry and the body slurry wrapped in the body For the foamed slurry in the slurry, when the slurry flows, it will inevitably meet the support rods, and the poor mixing of the main slurry and the foamed slurry will easily occur, which will make the resulting foamed tubes delaminated and increase the number of times. Product rate

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