Ultrasonic auxiliary impregnation composite material 3D printing device

Abstract

The invention relates to an ultrasonic auxiliary impregnation composite material 3D printing device. The 3D printing device comprises a printing support, a composite module and a ultrasonic vibrationmodule, wherein the ultrasonic vibration module comprises a vibration rod, an amplitude bar and a vibration generator; the outer surface of the vibration rod is in clearance fit with the inner wall ofa melting cavity of a blending unit; one end, away from a nozzle, of the vibration rod protrudes out of the blending unit; the vibration generator is fixedly arranged on the printing support; one endof the amplitude bar is connected with the vibration generator; and the other end of the amplitude bar is connected with one end, away from the nozzle, of the vibration rod. According to the 3D printing device, through auxiliary ultrasonic vibration, full soaking of fibers and molten resin is promoted, internal defects of a formed composite material are reduced, and mechanical properties and forming efficiency of a composite material workpiece are improved; and meanwhile, the ultrasonic vibration direction is well controlled to be pure torsional vibration, and the ultrasonic energy is only applied on the fibers and a molten matrix, so that the forming precision of the 3D printing composite material is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a composite material 3D printing device for ultrasonic-assisted impregnation. Background technique [0002] Due to its light weight, high strength and fatigue resistance, fiber reinforced composite materials have been widely used as a new generation of structural materials in biomedical, aerospace and other fields. 3D printing (additive manufacturing), as an innovative manufacturing process for composite materials, realizes low-cost and rapid manufacturing of composite materials, and further promotes the application range of composite materials. [0003] The current research on 3D printing of continuous fiber reinforced composites (CFRC) is mainly based on the fused deposition modeling (FDM) process. According to the different structural forms of raw materials supplied, they can be divided into two categories. One is to use continuous fiber / thermoplastic matrix ...

AI Technical Summary

Problems solved by technology

However, at present, this technology still has problems such as high internal defects of composite parts and unstable molding quality. This problem is especially obvious in the case of high-viscosity resin and fast printing speed. It is difficult to fully impregnate the fiber bundles with the resin matrix, resulting in The strength and stiffness of the part are obviously lower than the theoretical value, which limits its further application

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