Pultrusion method and equipment for thermoplastic composite material of continuous fiber

Abstract

The invention relates to a pultrusion method for a thermoplastic composite material of a continuous fiber, which is characterized by comprising the following steps of: firstly, after leading a continuous fiber made of a thermoplastic composite material out of a constant tension creel (1) to pass through a yarn collecting plate (2), delivering the continuous fiber into a dehumidifier (3) for dehumidifying and controlling the water content of the continuous fiber below 3 percent; secondly, delivering the dehumidified continuous fiber into a soaking device (5) for soaking; thirdly, controlling the heating temperature of a moulding die to be 150-300 DEG C to obtain a needed section bar; and fourthly, after delivering the moulded section bar into a cooling tank (7) for cooling, delivering the moulded section bar into a synchronous automatic cutting machine under the traction of a tractor (8) for cutting and packaging according to needed size. The invention also discloses complete equipment which comprises the constant tension creel (1), the yarn collecting plate (2), the dehumidifier (3), the soaking device (5), the moulding die (6), the cooling tank (7), the tractor (8) and the cutting machine (9). The invention has simple method, low equipment cost and high production efficiency.

Description

technical field [0001] The present invention relates to a composite material continuous molding method and equipment, especially a continuous pultrusion molding method of continuous fiber thermoplastic composite materials (such as reinforced polystyrene, reinforced polypropylene, polyvinyl chloride, polyphenylene sulfide, etc.) And equipment, specifically a continuous fiber thermoplastic composite material pultrusion method and equipment. Background technique [0002] Since the 1980s, thermoplastic resins and their composite materials have aroused great interest and made great progress. Thermoplastic composites avoid the inherent poor environmental friendliness, long processing cycle, and difficulty in recycling of thermosetting composites, and have strong flexibility and impact resistance, good damage resistance and damping properties. Thermoplastic composites can be reused. Continuous fiber thermoplastic composite profiles of various cross-sections (such as reinforced po...

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Problems solved by technology

[0003] The existing well-known traditional process method is based on the pultrusion process using glass fiber and carbon fiber-added thermosetting resin as the matrix. Due to the following shortcomings, it cannot be directly applied to the processing of continuous fiber thermoplastic composite materials:

[0004] 1. The parts cannot be reshaped, because the cross-linking of resin molecules is irreversible;

[0005] 2. Harmful chemical solvents must be used, such as styrene, methyl diphenylamine, etc.;

[0006] 3. The best fiber / resin volume ratio cannot be obtained, and the maximum mechanical strength cannot be achieved, that is, compression, tensile, bending strength, and product surface roughness

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