Continuous filament prepreg 3D printing spray head and 3D printer and printing method thereof

Abstract

The invention discloses a continuous filament prepreg 3D printing spray head and a 3D printer and a printing method thereof. The continuous filament prepreg 3D printing spray head comprises a rotating mechanism, a fixed support, a heat dissipation device, a heating device, a guide channel and pressing wheels. The heat dissipation device is screwed to the lower end of the fixed support, the heating device is connected to the lower end of the heat dissipation device, the guide channel sequentially penetrates the fixed support, the heat dissipation device and the heating device and used for downwards supplying prepreg, and the pressing wheels are arranged at the lower end of the heating device, distributed on the two sides of the guide channel and used for compacting the continuous filament prepreg which is in a molten state. The fixed support is provided with a feeding device, a shearing mechanism and a shearing and re-feeding device, wherein the feeding device and the shearing and re-feeding device are used for providing power for downward feeding, and the shearing mechanism is used for shearing off the prepreg according to needs. By means of the continuous filament prepreg 3D printing spray head and the 3D printer and the printing method thereof, continuous filament prepreg 3D printing is achieved, the overall strength and the interlaminar shear strength of non-metal 3D printing are improved, and the technical difficulty of continuous filament prepreg structural component forming is lowered.

Description

technical field [0001] The invention belongs to the technical field of continuous fiber prepreg 3D printing, and in particular relates to a continuous fiber prepreg 3D printing nozzle, a 3D printer, and a printing method thereof. Background technique [0002] 3D printing technology has the advantages of increasing materials, reducing waste of raw materials and saving costs during processing. 3D printing technology combines different disciplines such as materials, computers, and control. It is a technology based on digital model files and bonding different materials layer by layer to construct objects. Divided by material, 3D printing technology can be divided into metal 3D printing and non-metal 3D printing. Non-metallic materials are mainly some thermoplastic resin materials. Due to the relationship between raw materials, the strength of non-metal 3D printed parts is not high and cannot be used directly. This is one of the reasons why there are no industrial-grade 3D print...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned shortcomings of low strength of non-metallic 3D printing parts and the lack of obvious strength improvement of existing continuous fiber reinforced non-metallic 3D printing parts, the present invention provides a continuous fiber prepreg 3D printing nozzle and its 3D printing And, the printing method, the present invention uses the thermoplastic resin-based continuous fiber prepreg to process the composite material parts by means of 3D printing, which reduces the processing technical difficulty of the traditional continuous fiber prepreg, and greatly improves the non-metallic 3D printing. strength

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