High density polyethylene outer protective pipe molding device

Abstract

The invention relates to a high density polyethylene outer protective pipe molding device which comprises a machine head body, a spure spreader, a spit-flow support, a mouth mold and a core mold, wherein the spure spreader is arranged in the machine head body, the core mold is arranged in the mouth mold, the machine head body and the mouth mold are connected through the spit-flow support and a sieve plate, the spure spreader and the core mold are connected by a core mold connecting piece, and therefore, an inner runner is formed between the connected machine head body and mouth mold, and the connected spure spreader and core mold; a core mold blocking plate is arranged at one end of the core mold, which is far away from the spure spreader, a mouth mold flange is arranged on the mouth mold; the molding device also comprises a sizing water jacket which is connected with the mouth mold and the core mold; and the inner runner formed between the connected machine head body and mouth mold, and the connected spure spreader and core mold is communicated with the sizing water jacket. The high density polyethylene outer protective pipe molding device has the beneficial effects: the structure is simple, an extrusion compression ratio can be controlled and the thickness of a produced outer protective sleeve is uniform.

Description

technical field [0001] The invention relates to a molding production device specially used for the two-step method, that is, the "pipe-in-pipe method" to produce direct-buried thermal insulation pipes, and high-density polyethylene outer protective pipes. Background technique [0002] The direct-buried thermal insulation pipe is an advanced thermal insulation pipe at home and abroad. It replaces the original rock wool thermal insulation material. During the manufacturing process of rock wool thermal insulation material, it is harmful and pollutes the environment seriously. There are many thermal insulation construction procedures and great difficulty. It must also be constructed and installed in the open air, which consumes a lot of overhead steel, which affects the appearance of the city, and has a high heat loss rate and a short service life. It needs to be repaired or replaced every year, which greatly increases the cost. Buried underground, easy to construct, good therma...

AI Technical Summary

Problems solved by technology

[0003] The quality of the outer protective tube of the directly buried thermal insulation pipe directly affects the overall performance of the thermal insulation tube. However, the existing outer protective tube forming device has a relatively complicated structure and unreasonable design, which makes the thickness of the outer protective tube produced uneven and the quality cannot be obtained. ensure

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