Interlayer reinforcement technology for 3D printing of fiber reinforced composite

Abstract

The invention relates to an interlayer reinforcement technology for 3D printing of a fiber reinforced composite and belongs to the technical field of interlayer reinforcement technologies for 3D printing of continuous fiber reinforced thermoplastic resin matrix composites. 3D printing equipment involved in the interlayer reinforcement technology comprises at least two printing nozzles, namely a fiber reinforced thermoplastic resin printing nozzle (an in-plane nozzle) and an interlayer reinforcement nozzle. The interlayer reinforcement technology comprises the following working steps: firstly,printing certain layers of an in-plane material by using the in-plane nozzle till the thickness reaches 0.5 mm to 30 mm; secondly, according to the design space, implanting a thin bar into a multi-point position of the printed layered area by using the interlayer reinforcement nozzle so as to complete the one-layer reinforcement operation; and thirdly, repeating step 1 to step 2 so as to completethe multi-layer printing and reinforcement operation till a product is printed. The interlayer reinforcement technology provided by the invention has the beneficial effects that the cost is low; the degree of automation is high; and the weak interlayer performance of a 3D printing product can be greatly improved.

Description

technical field [0001] The invention relates to the field of 3D printing of fiber-reinforced composite materials, in particular to an interlayer reinforcement technology for 3D printing of continuous fiber-reinforced thermoplastic resin-based composite materials. Background technique [0002] 3D printing technology is an emerging technology in the field of rapid prototyping, which comprehensively applies new manufacturing processes in cutting-edge technology fields such as computer-aided design, polymer material science, and digital control. 3D printing technology omits the processing and manufacturing of product molds, greatly shortens the product development cycle in terms of time, and is not limited by the complexity of the shape of the parts, and is receiving more and more attention. [0003] In the early stage of the development of 3D printing technology, thermoplastic resin consumables that can be heated and melted are generally used as molding materials. The material ...

AI Technical Summary

Problems solved by technology

However, the 3D printing technology of continuous fiber reinforced thermoplastic resin matrix composites adopts the same layer-by-layer lay-up process as the traditional technology to form products, and the poor interlayer bonding force of the products has not been improved, especially in many fields such as aerospace. The requirements for light weight and high strength of parts are becoming increasingly stringent, and any defect will limit its development in the industry

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