Thermoplastic composite product

Abstract

The invention discloses a thermoplastic composite product.The product is characterized by being obtained by processing carbon fiber, thermoplastic plastic and additive through injection molding, and the length of 50% or above of carbon fiber in the processed product is larger than or equal to 5 mm.The product has the advantages that the length of most (50% or above) of carbon fiber in the processed product is 5 mm to 30 mm, so the processed product is good in impact resistance and can be used as a functional structural piece such as an automobile hub, a bumper, a reinforcing beam and a supporting frame; the product is obtained by online mixing injection molding of an injection molding machine, a connecting pipeline of a twin-screw extruder and the injection molding machine is in a closed state during processing, the temperature and pressure of polymer are controllable in the whole process, and the product is stable in quality, can be processed into a product of a complex structure, and is precise in size, free of post-processing and high in production efficiency; in addition, through the combination of the injection molding process technology during processing, the more precise thermoplastic composite product is obtained through processing.

Description

technical field [0001] The invention relates to products processed from composite materials, in particular to a thermoplastic composite product with better impact resistance. Background technique [0002] Carbon fiber composites are widely used in many fields because of their light weight, good strength and other good material properties. At present, the processing and molding processes of carbon fiber composite materials mainly include: hand lay-up molding, winding molding, resin transfer molding and pellet injection molding. Among them: hand lay-up molding and winding molding have low production efficiency, high labor intensity, and difficult product quality. Control, and the use of thermosetting resin materials, can not be recycled and other shortcomings, mainly used in the production of simple-shaped parts in automobile parts, it is difficult to meet the requirements of industrial production and environmental protection of automobiles; the main characteristics of the res...

AI Technical Summary

Problems solved by technology

At present, the processing and molding processes of carbon fiber composite materials mainly include: hand lay-up molding, winding molding, resin transfer molding and pellet injection molding. Among them: hand lay-up molding and winding molding have low production efficiency, high labor intensity, and difficult product quality. Control, and the use of thermosetting resin materials, can not be recycled and other shortcomings, mainly used in the production of simple-shaped parts in automobile parts, it is difficult to meet the requirements of industrial production and environmental protection of automobiles; the main characteristics of the resin transfer molding process are closed mold operation, No pollution, low molding pressure, reinforcing materials can be laid according to design requirements, both sides of the product are smooth, and large-scale products with complex shapes can be made, etc. However, the resin transfer molding process uses thermosetting resin materials, which cannot be recycled, and it is difficult to meet the industrial production of automobiles and environmental protection requirements; and pellet injection molding is to process carbon fiber composite materials into long pellets with a diameter of about 3mm and a length of about 15mm, and then add the long pellets to a conventional injection molding machine for injection molding, which uses thermoplastic Composite materials, compared with the previous molding processes, have high production efficiency, the processed products can be recycled, and the impact resistance has been significantly improved, but they still cannot be used to manufacture parts with strong stress, such as manufacturing automobile wheels, Functional structural parts such as bumpers, reinforcing beams and support frames

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