Forming method of thermoplastic continuous fiber-reinforced composite material piece

A reinforced composite material and continuous fiber technology, which is applied in the molding field of thermoplastic continuous fiber-reinforced composite parts, can solve the problems such as the material strength of continuous fiber composite board and the limited design space of product wall thickness, and achieve easy industrial implementation and combination The effect of strong force and simple post-processing process

Active Publication Date: 2020-02-07
中广核俊尔(浙江)新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention is a blending process of impregnated continuous fiber preparation and pelletizing. The listed strength is slightly higher than that of traditional twin-screw modified resin, but far less than the strength of continuous fiber composite board material, and the design space for product wall thickness is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] (1) Preparation of organic sheet

[0043] The thermoplastic continuous fiber prepreg tape is symmetrically laminated and molded into an organic composite board in a certain way, and the thickness of the prepreg tape is 0.12-0.35mm. Teflon belt compound machine is used, the compound temperature is 180-260 ℃, and the thickness is controlled at 0.5-2.2mm. This time, the organic board with a thickness of 1.6mm was verified, and the cutting shape was 218×138mm.

[0044] (2) Place the cut organic sheet on the stainless steel grid tray, and the grid tray can be removed from the middle.

[0045] (3) Move the cut organic board horizontally into a horizontal infrared oven. The oven is heated on both sides, and the set temperature is 230-280°C. The best state is to preheat the resin matrix on the surface of the board to soften but not flow. The heating time is adjusted according to the temperature setting and the heating power of the oven, and is generally controlled within 1 to...

Embodiment 1

[0057] Continuous glass fiber PP prepreg tape, thickness 0.2mm, layering method (0 / 45 / -45 / 0)s, injection molding material adopts PP+T20, adding chemical foaming agent 2wt%, mold temperature 90℃; injection molding products without Warping, the shrinkage of the ribs is not obvious, the binding surface of the edge is not obvious, and the flat part of the product is smooth and clean.

Embodiment 2

[0059] Continuous glass fiber PP prepreg tape, thickness 0.2mm, layering method (0 / 45 / -45 / 0)s, injection molding material adopts PP+GF30, add chemical foaming agent 2wt%, mold temperature 110℃; injection molding products without Warping, the shrinkage of the ribs is not obvious, the binding surface of the edge is not obvious, and the flat part of the product is smooth and clean.

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Abstract

The invention discloses a forming method of a thermoplastic continuous fiber-reinforced composite material piece. The forming method comprises the steps that (1) thermoplastic continuous fiber prepregtape is subjected to overlaying and mould pressing, and an organic composite plate is obtained; (2) the organic composite plate obtained in the step (1) is subjected to two-dimensional cutting, and a2D organic plate is obtained; (3) the 2D organic plate obtained in the step (2) is heated, softened and then moved into a forming mould; and (4) mould assembling and micro-foam injection molding areconducted, and after cooling and mould opening, the thermoplastic continuous fiber-reinforced composite material piece is obtained. According to the forming method, the thermoplastic continuous fibercomposite material and the micro-foam injection molding material are combined, integrated forming is achieved through mould pressing-injection moulding, materials, moulds and the forming technique arecooperated, and the prepared composite material piece is smooth and even in surface, free of reduction and low in warping angle and is suitable for subsequent spraying and coating. The product rigidity is high, the weight is low, and the piece is suitable for preparation of television and computer shells as well as automobile accessory light-weight outer parts.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials and molding, in particular to a molding method of thermoplastic continuous fiber reinforced composite material parts. Background technique [0002] With the continuous development of industrial manufacturing technology and plastic modification technology, plastic instead of steel has formed a trend in automobile manufacturing, mobile office and home furnishing industries. Many traditional metal parts are gradually replaced by high-performance plastics, but Due to the limited strength of general-purpose modified engineering plastics, it is more difficult to replace metal parts with higher structural strength requirements. The composite material is mainly made of continuous fibers, and the polymer resin plays the role of impregnation and bonding. The strength of the composite material can reach the level of high-strength fibers contained in it. In recent years, it has been applie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B29C45/17B29C70/34B29C45/72B29C44/12B29K201/00
CPCB29C44/1209B29C45/0001B29C45/1418B29C45/14221B29C70/34B29C2045/14237B29C2045/14286B29K2201/00
Inventor 黄瑞杰陈光剑宋玉兴张成周功浪张磊陈晓敏
Owner 中广核俊尔(浙江)新材料有限公司
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