PP-R (polypropylene) pipe production equipment

Abstract

The invention discloses PP-R (polypropylene) pipe production equipment. The PP-R (polypropylene) pipe production equipment comprises an extruder, a machine head arranged on the extruder, and a forming head arranged at an outlet end of the machine head, wherein the machine head comprises a core model, a mouth model, an adjusting seat, a core model afterbody, an outer model afterbody, and a core model seat; the core model afterbody comprises a flange and a core model section, the core model section of the core model afterbody is conical and is inserted into an inner hole of the outer model afterbody, the core model afterbody is internally provided with a feeding inlet, a spiral chute is arranged in the outer surface of the core model section of the core model afterbody, the depth of the spiral chute is gradually shallower from the head part to the tail part, and the head part of the spiral chute is communicated with the feeding inlet by a distribution hole arranged in the core model afterbody. When materials pass through the spiral chute, the melt flow is changed from the axial direction to the radial direction, thereby playing a good mixing effect and effectively eliminating the stress memory property of a melt.

Description

technical field [0001] The invention relates to pipe production equipment, in particular to a PP-R pipe production equipment. Background technique [0002] Non-return copolymer polypropylene (PP-R) pipes are obtained by continuous extrusion molding with an extruder. To obtain pipes with excellent performance, not only excellent PP-R raw materials and reasonable process technology are required, but also advanced production equipment is required. The advanced extrusion equipment can not only transfer the excellent properties of raw materials to pipes, but also has stable production and high speed, which can meet the needs of production and supply. [0003] The existing PP-R pipe extruder has the following problems: 1. The production speed is low, only 8 m / min; 2. The tube billet is prone to flow orientation effect in the head, and the head pressure is high, so high extrusion volume cannot be achieved , which affects the production speed; 3. The mixing effect of materials in t...

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Problems solved by technology

[0003] The existing PP-R pipe extruder has the following problems: 1. The production speed is low, only 8 m / min; 2. The tube billet is prone to flow orientation effect in the head, and the head pressure is high, so high extrusion volume cannot be achieved , which affects the production speed; 3. The mixing effect of materials in the machine head is not good, and it is easy to produce melt stress memory

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