Internal-heating-type extruding device

Abstract

The invention provides an internal-heating-type extruding device, comprising a flange disc, a machine head connecting body, a pressing cover, an opening module, a core rod and a sprue spreader, wherein the flange disc is sleeved on the outer side of the machine head connecting body, and the opening module is sleeved inside the machine head connecting body and is tightly buckled by virtue of the pressing cover; the sprue spreader is fixed inside the machine head connecting piece through a flat key; the core rod is connected with the sprue spreader through a bolt, is sleeved in the opening module and is fixedly connected with the machine head connecting body by a fastening bolt; a mounting hole is formed in the middle of the core rod; and a heating device is distributed inside the mounting hole. The internal-heating-type extruding device has the beneficial effects that grain materials are heated from outside to inside in a heating cavity before extrusion molding, and the heating device in the core rod also can be used for heating the grain materials from inside to outside in an extrusion process, so that the heating and fusing degree of the grain materials inside are more uniform, raw materials are sufficiently fused, the quality of a tubular product produced by the extrusion molding process is good, and the performance of the tubular product is stable; and the heating equipment is convenient to maintain, is easy to operate and has high yield.

Description

Technical field [0001] The invention belongs to the field of plastic pipe processing, and in particular relates to a heating type extrusion device in a plastic pipe extruder. Background technique [0002] In recent years, thermoplastic materials based on resin synthetic materials have become more and more important in people's lives, and their processing equipment and processing techniques are gradually improving. Especially in the preparation of plastic pipes, new plastics such as PVC, PE, PPR have gradually replaced metal pipes with their advantages. This puts forward higher requirements for the production quality, yield and stability of plastic pipes. [0003] In the general plastic pipe processing process, the raw material particles need to be dehumidified, heated, extruded, shaped, etc., and heated in a heater before extrusion. The heating in this process is due to a certain volume of heating chamber Done in. Because the outer wall of the heating chamber heats the granular ...

AI Technical Summary

Problems solved by technology

Since the outer wall of the heating chamber heats the granular material, the degree of heating and melting of the inner particles may be uneven, resulting in a small amount of raw materials that cannot be fully melted, and uneven particles may appear inside the pipe produced during extrusion

Particles on these pipes may become blasting points in the future, bringing hidden dangers to use

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