Extrusion device and method for oriented chopped carbon fiber reinforced thermoplastic composite

Abstract

The invention discloses an extrusion device and method for an oriented chopped carbon fiber reinforced thermoplastic composite, and belongs to the field of composite processing. A multifunctional stirring device is arranged in the middle of the interior of a melting chamber; the bottom of the melting chamber is connected to an extrusion chamber horizontally arranged left and right by a gate valve;a telescopic hydraulic cylinder which is horizontally arranged is located at the left side of the extrusion chamber; the right end of the telescopic hydraulic cylinder is connected to a first-stage sleeve piston; a second-stage sleeve piston is coaxially connected to the first-stage sleeve piston; a right end outlet of the extrusion cavity is coaxially connected and communicates with a tapered stepped pipe type nozzle; the interior of the tapered stepped pipe type nozzle is provided with multiple-stage tapered stepped pipes from left to right; and the inner diameters of pipelines of the tapered stepped pipes decrease in sequence from left to right, and the left and right lengths sequentially decrease from left to right. The extrusion device and method integrate the three processes of blanking, stirring and extruding, guide chopped carbon fiber yarns to be directionally arranged in a thermoplastic resin matrix in a material extrusion direction, and directly process the chopped carbon fiber yarns and thermoplastic resin matrix raw materials into continuous wires.

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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