Thermoplastic pultrusion once-forming process

A molding process and yarn technology, which is applied in the field of thermoplastic composite material production and processing, can solve the problems of complex production process and production speed limitation, and achieve the effects of full penetration, fast one-time pultrusion and fast dipping speed

Inactive Publication Date: 2019-03-08
ZHENSHI GRP HUAMEI NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The prepolymer pultrusion process uses the monomer and initiator to soak the glass fiber in the melting stage, and the resin polymerizes during the soak; the monomer and the initiator ne

Method used

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  • Thermoplastic pultrusion once-forming process
  • Thermoplastic pultrusion once-forming process
  • Thermoplastic pultrusion once-forming process

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0027] Example.

[0028] see image 3 , The thermoplastic pultrusion one-time molding process of this embodiment is characterized in that it includes the following steps: (1) Yarn distribution: placing the yarn on the creel.

[0029] (2) Arranging yarn: threading and arranging the yarn on the creel.

[0030] (3) Glass fiber impregnation: After the yarn is arranged and carded, the yarn is extruded through the screw extrusion equipment, and the material is injected into the impregnation area in a high-temperature mode, and the resin is melted at a high temperature to achieve glass fiber impregnation.

[0031] (4) Forming traction: The impregnated resin is directly formed through the preformed mold after heat preserv...

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Abstract

The invention relates to a thermoplastic pultrusion once-forming process and belongs to the field of thermoplastic composite material production and processing. The thermoplastic pultrusion once-forming process sequentially comprises the following steps of yarn distribution, wherein yarn is placed on a yarn rack; yarn arranging, wherein the yarn on the yarn rack is subjected to threading, arranging and carding; glass fiber infiltration, wherein the arranged and carded yarn is injected into a gum dipping area by means of extrusion by screw rod extrusion equipment and high temperature, and resinmelts at high temperature to realize glass fiber infiltration; forming traction, wherein resin obtained after gum dipping passes through a preforming mold and is directly formed after heat preservation and cooling, and then a product is pulled out through traction; and cutting. The thermoplastic pultrusion once-forming is simple and reasonable in process design, stable, reliable and quick in forming, realizes continuous pultrusion once-forming, and meets use requirements.

Description

technical field [0001] The invention relates to a process, in particular to a thermoplastic pultrusion one-time molding process, which belongs to the field of production and processing of thermoplastic composite materials. Background technique [0002] Thermoplastic pultrusion has the characteristics of strong flexibility, impact resistance, good damage resistance, recyclability, and reusability. However, this process is restricted by the following disadvantages: such as high melt viscosity, high molding temperature, solid matrix at room temperature, precise control of cooling and large shrinkage during melt cooling, and large fluctuations in product quality. [0003] The key problems encountered in thermoplastic matrix pultrusion mainly include: the matrix is ​​solid at room temperature, poor fluidity (high viscosity) at melting temperature, and large shrinkage when the melt is cooled. [0004] Generally, the thermoplastic composite pultrusion process can be divided into t...

Claims

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Application Information

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IPC IPC(8): B29C70/52B29C70/54
CPCB29C70/52B29C70/54
Inventor 王运明李杰李雪建姚诗荣
Owner ZHENSHI GRP HUAMEI NEW MATERIALS
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