Extrusion device and method for directional chopped carbon fiber reinforced thermoplastic composites

Abstract

The invention discloses an extruding device and method for directional chopped carbon fiber reinforced thermoplastic composite materials in the field of composite material processing. A multifunctional stirring device is installed in the middle of the inside of the melting chamber, and the bottom of the melting chamber is connected to extruders arranged horizontally on the left and right through gate valves. The material chamber, the left side of the extrusion chamber is a telescopic hydraulic cylinder arranged horizontally, the right end of the telescopic hydraulic cylinder is connected with a first-stage sleeve piston, and the second-stage sleeve piston is coaxially connected with the first-stage sleeve piston; The outlet at the right end is coaxially connected and connected to the tapered stepped pipe nozzle. The tapered stepped pipe nozzle has a multi-stage tapered stepped pipe from left to right inside, and the inner diameter of the tapered stepped pipe decreases from left to right. And the left and right lengths decrease successively from left to right; the invention integrates the three processes of blanking, stirring and extruding into one, and guides the directional arrangement of chopped carbon fiber filaments in the thermoplastic resin matrix along the direction of material extrusion, and the chopped carbon fiber Filament and thermoplastic resin matrix raw materials are directly processed into continuous filaments.

Description

technical field [0001] The invention relates to the field of composite material processing, in particular to a wire extrusion device and method for directional chopped carbon fiber reinforced thermoplastic composite materials. Background technique [0002] Carbon fiber is a kind of fibrous carbon material, which has the advantages of high temperature resistance, corrosion resistance, high thermal conductivity, etc. It is mainly used as carbon fiber reinforced composite materials. In actual use, carbon fiber-reinforced composite materials have performance advantages that other fiber-reinforced composite materials cannot match. This composite material has high strength, fatigue resistance, corrosion resistance, and good electrical and thermal conductivity. With the application of 3D printing technology, the use of 3D printing technology to produce new components of carbon fiber reinforced composite materials has become an emerging manufacturing process. Common 3D printing for...

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Problems solved by technology

[0008] In order to overcome the difficulty in uniform mixing of chopped carbon fiber filaments and thermoplastic composite materials existing in the traditional 3D printing extrusion device and the above-mentioned oriented alignment processing device for mixing chopped carbon fiber and thermoplastic composite materials, the chopped carbon fiber filaments are in the molten thermoplastic composite material. It is difficult to achieve orientation alignment, and the melted thermoplastic composite material is easy to block with the decrease of temperature during the extrusion process. The present invention provides an extrusion device for directional chopped carbon fiber reinforced thermoplastic composite material, which can effectively avoid the above-mentioned problems through the combination of various structures. the occurrence of problems

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