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Method for manufacturing pipeline through reaction injection-rotation moulding, pipeline die and pipeline moulding device

A rotational molding and injection molding technology, which is applied in applications, household appliances, tubular objects, etc., can solve the problems of polymer material pipes that are hard to come out, and achieve the effect of easy quality control, easy demoulding, and smooth outer wall

Inactive Publication Date: 2017-04-05
张航
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing pipes by reaction injection-rotomolding, so as to solve the problem that the existing polymer material pipes are difficult to escape from the mold

Method used

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  • Method for manufacturing pipeline through reaction injection-rotation moulding, pipeline die and pipeline moulding device
  • Method for manufacturing pipeline through reaction injection-rotation moulding, pipeline die and pipeline moulding device
  • Method for manufacturing pipeline through reaction injection-rotation moulding, pipeline die and pipeline moulding device

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Embodiments of the pipe forming apparatus of the present invention, such as Figure 1 to Figure 4 As shown, the pipeline mold is comprised, and the pipeline mold comprises a mold body 1, and the mold body 1 comprises an upper mold 14 and a lower mold 15, and the upper mold and the lower mold are all provided with arc-shaped inner concave surfaces. The arc-shaped inner concave surface is combined to form a cylindrical mold cavity. Flanges 2 are provided at the front and rear ends of the mold body 1, and the flanges are connected to the corresponding flange covers 6 and realized circular through flange cover fixing screws 5. The two ends of the cylindrical mold cavity are sealed, and an injection port (not shown in the figure) is opened at the center of one of the flange covers; four fastening sleeves are set at intervals along the axial d...

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Abstract

The invention relates to a method for manufacturing a pipeline through reaction injection-rotation moulding, a pipeline die and a pipeline moulding device. The method comprises injecting reaction injection moulding raw materials in a pipeline die with a closed cylindrical die cavity, rotating the pipeline die around an axis of the cylindrical die cavity, allowing the reaction injection moulding raw materials to spread on an inner wall of the closed cylindrical die cavity, forming a tube structure, performing curing and performing demoulding to obtain the pipeline. According to the method, the characteristic that the normal reaction injection moulding raw materials are low in viscosity is used, the curing reaction is controlled to be performed in a rotation condition, and the raw materials can be uniformly spread inside the die cavity for a curing reaction, so that the manufactured pipeline is good in pipeline uniformity. Since shrinkage happens after curing and no die core is used, the final pipeline product can be conveniently demoulded from the die.

Description

technical field [0001] The invention belongs to the field of reaction injection molding, and in particular relates to a method for preparing a pipeline by reaction injection-rotation molding, a pipeline mold and pipeline forming equipment. The pipe mold and pipe forming method are suitable for reaction injection molding of polydicyclopentadiene, polyurethane elastomer, unsaturated polyester resin, epoxy resin and other polymer material pipes. Background technique [0002] Pipelines for conveying corrosive liquids are often used in chemical and environmental protection equipment, which require acid and alkali corrosion resistance and high mechanical strength. Metal alloy materials have poor corrosion resistance and high cost, so most of these pipes are made of FRP. The production process of FRP has serious pollution and low production efficiency. At the same time, FRP pipe products have high density, poor comprehensive performance, short service life and low cost performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C41/04B29C41/38B29C41/42B29L22/00
CPCB29C41/042B29C41/38B29C41/42B29L2023/22
Inventor 张航
Owner 张航
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