Double-spray-nozzle 3D printing system and method of thermoplastic resin base continuous fiber prepreg material

Abstract

The invention provides a double-spray-nozzle 3D printing system and method of a thermoplastic resin base continuous fiber prepreg material. Double spray nozzles include a thermoplastic resin base continuous fiber prepreg material printing spray nozzle and a thermoplastic pure resin printing spray nozzle. The thermoplastic resin base continuous fiber prepreg material printing spray nozzle has the functions of thermoplastic resin base continuous fiber prepreg material feeding, guiding, clipping, heating and printing compaction, and all functions can be controlled through G codes. By the adoption of the method, the optimal design of a structural part to be printed is conducted according to the practical load condition, then 3D printing of the thermoplastic resin base continuous fiber prepreg material is conducted according to a mechanical optimized structure, and therefore the printed structural part enables thermoplastic resin base continuous fibers to achieve the highest utilization ratio, the consumption of raw materials is reduced, and the processing cost is reduced. In addition, the design of the double spray nozzles can achieve printing of parts with cantilever structures, and the cantilever structure portions can be printed and supported by the use of the thermoplastic pure resin printing spray nozzle.

Description

technical field [0001] The invention mainly relates to the technical field of 3D printing of composite materials, and specifically designs a dual-nozzle 3D printing system and method for thermoplastic resin-based continuous fiber prepreg. Background technique [0002] 3D printing is a kind of rapid prototyping method. The principle is to reduce the dimensionality of the three-dimensional model to two-dimensional by slicing, and then print out the three-dimensional structure layer by layer. This molding process of 3D printing is an additive manufacturing method different from traditional subtractive processing, which not only reduces the waste of raw materials, but also reduces the processing difficulty of complex structural parts. [0003] In addition to metal 3D printing, the current 3D printing technology has insufficient mechanical strength for structural parts printed by other 3D printing processes, so it can only be used as handicrafts or display models, and cannot be u...

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Problems solved by technology

[0005] The present invention is aimed at the problems that the existing non-metallic 3D printing structural parts have low mechanical properties and the continuous fiber 3D printing method does not give full play to the continuous fiber reinforcement performance, etc., and proposes a dual-nozzle 3D printing of thermoplastic resin-based continuous fiber prepreg systems and methods

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