A kind of additive manufacturing method of continuous fiber unidirectional prepreg tape

Abstract

The invention discloses a continuous fiber unidirectional prepreg tape additive manufacturing method, which includes three-dimensional modeling of a product, and stress simulation of the product based on the three-dimensional model through software to obtain a stress simulation diagram of the product; and a 3D printer based on the three-dimensional model. Pre-set printing path, according to the printing path, use the flat-mouth printing head to pre-stress the continuous fiber prepreg flat tape layer by layer, and rotate the flat-mouth printing head to lay the continuous fiber pre-impregnated flat tape on each layer directionally according to the stress simulation diagram. A product preform is obtained; a high pressure curing process is performed on the product preform to obtain a product embryo; the product embryo is machined and coated to obtain a final product. The invention provides a reliable, fast and low-cost manufacturing method for rapid prototyping of continuous fiber composite materials and three-dimensional fiber preforms, opens up a development direction for composite material additive manufacturing, and will subvert the composite material manufacturing industry model of high-performance thermosetting resins .

Description

technical field [0001] The present invention relates to the technical field of 3D printing, in particular to a continuous fiber unidirectional prepreg tape additive manufacturing method. Background technique [0002] With the wide application of fiber composite materials and the rapid development of 3D printing technology, the 3D printing of continuous fibers of composite materials is in a new stage of accumulation. In the fields of new product development, mold manufacturing and mechanical processing, explosive growth trend. [0003] At present, methods such as in-situ dipping, tow co-extrusion, tow extrusion, and in-situ merging have been used to solve some of the problems of continuous fiber additive manufacturing, but it also brings some new problems, such as the reduction of comprehensive fiber properties, Higher resin quality requirements and other issues; at the same time, continuous fiber prepreg tapes with a circular cross-section are prone to printing gaps, the pr...

AI Technical Summary

Problems solved by technology

[0003] At present, methods such as in-situ impregnation, tow co-extrusion, tow extrusion, and in-situ merging have been used to solve some of the problems of continuous fiber additive manufacturing, but they have also brought some new problems, such as the reduction of fiber comprehensive properties, Higher resin quality requirements and other issues; at the same time, continuous fiber prepreg tapes with circular cross-sections are prone to printing gaps, printing thickness is not easy to control, and finished products are easy to crack, etc.

Images