A foam tube extrusion die with adjustable feed flow rate

Abstract

The invention relates to a foaming pipe extrusion die capable of adjusting the flow rate of a feeding material. The foaming pipe extrusion die comprises a tubular extrusion die which is transversely extended and a columnar core die which is arranged inside the extrusion die, wherein a tubular gap between the extrusion die and the core die becomes a slurry channel, a central spindle which is transversely extended is arranged on an axis of the core die, and a columnar supporting bar for connecting the central spindle with the outer wall of the extrusion die is arranged on the axial middle part. The foaming pipe extrusion die is characterized in that the transverse two ends of the foaming pipe extrusion die are an inlet end and an outlet end, an adjuster of which head of in a cone shape and an axial distance relative to the core die can be adjusted, is arranged on the core die at the inlet end, the adjuster is connected with the core die by bolts and the head of the core die is towards outside. According to the foaming pipe extrusion die, the adjuster of which the axial distance can be adjusted is arranged at the inlet end of the extrusion die, the outlet end flow rate of a channel inside a feeding die for matching use is changed, so that the flexible control of an operator is convenient, and the quality stability of the foaming pipe is guaranteed. An elastic sealing spacer can be arranged between the adjuster and the core die inlet end of the die, so that the sealing performance of the slurry channel can be guaranteed and metal connection components are protected.

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 foamed pipe material includes a tubular body and an annular foam layer arranged in the middle of the body. Correspondingly, the pipe material slurry also includes the body slurry and the foam slurry wrapped in the body slurry. The feeding mold is equipped with inner and outer three-layer passages, in which the inner and outer passages use the body slurry, and the middle passage uses the foaming slurry. At the intersection end is the outlet end of the feeding mold, the inner and outer body slurry wraps the foaming slurry in the middle to form Pipe material slurry, because the slurry channel of the extrusion die is tubular, when the main body slurry in the inn...

AI Technical Summary

Problems solved by technology

However, since the position of the regulator relative to the feed mold is not variable, the width of the inner passage which becomes ring-shaped at the outlet end of the feed mold is fixed, and the operator has poor control over the slurry flow

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