Fiber reinforced thermoplastics composite material section bar and molding technology

Abstract

The invention discloses a fiber reinforced thermoplastics composite material section bar relating to a new molding technology for producing continuous fiber thermoplastics composite material section bar. Glass fiber yarn, fiber glass cloth and a glass fiber mat form a fiber preimpregnating board in a fiber laying and weaving area (1) by a beam concentration weaving device. The fiber preimpregnating board which is in beam concentration weaving forms a composite blank board after fully rolled and infiltrated by a material pressing roller in a constant-temperature gum dipping slot. The compositeblank plate is successively subject to pressure preforming (3) and pressure forming (4), is cooled by a cooling device to form continuous finished product section bar and is cut into required finished product section bar by a board shearing device. The product of the invention can automatically determine material and proportioning according to different requirements of the product, and burdening degree of freedom is high; in the molding process, the product of the invention has extra low abrasion degree on fiber, and all glass fiber in the product is continuous filament; according to different using requirements, the fiber is laid to be designed and adjusted to ensure that the final finished product has excellent mechanical property and appearance; and the product has smaller abrasion on molding equipment and is easier to recycle and reuse the recycled scrap.

Description

technical field [0001] The invention relates to a profile forming technology for producing continuous fiber thermoplastic composite material. Background technique [0002] At present, the continuous fiber-reinforced thermoplastic composite profile products are mainly manufactured by pultrusion process. Pultrusion molding can be said to be the most highly automated and most suitable technology for continuous production in composite material processing methods. As long as it is a workpiece with a fixed cross-sectional shape, almost all can be used. Processing by pultrusion. However, this process is restricted by the following disadvantages, such as high melt viscosity, poor fluidity at melting temperature, high molding temperature, precise control of cooling is required, the matrix is ​​solid at room temperature, large shrinkage when the melt is cooled, and large fluctuations in product quality Wait. [0003] In addition, the above-mentioned shortcomings are more obvious whe...

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Problems solved by technology

However, this process is restricted by the following disadvantages, such as high melt viscosity, poor fluidity at melting temperature, high molding temperature, precise control of cooling is required, the matrix is ​​solid at room temperature, large shrinkage when the melt is cooled, and large fluctuations in product quality Wait

[0003] In addition, the above-mentioned shortcomings are more obvious when the pultrusion process is used to produce products with a larger cross-sectional width, such as the production of plate products.

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