Preparation method of 3D printing component and 3D printing space component

Abstract

The invention provides a preparation method of a 3D printing component and a 3D printing space component. The preparation method comprises the following steps of preparing 3D printing material granules, wherein the 3D printing material granules comprise a plurality of modified chopped fibers and components at least containing thermoplastic resin, an active group is grafted on the end surface of any of the modified chopped fibers, and the other parts except the end surfaces of the modified chopped fibers are coated with inert resin, and the inert resin and the active groups do not react; and conveying the 3D printing material particles into a nozzle to be fused and then squeezed out, and then on a pre-printing plane, carry out stacking and forming on the squeezed out fusant. According to the printing method of the 3D printing space component, prepared printing materials are improved, the concept of the reaction connection of the modified chopped fibers, namely, reinforced item fragments, is brought into continuous fiber reinforced thermoplastic material, so that on one hand, the advantages of continuous fibers in 3D printing can be achieved, and on the other hand, on the basis of keeping the advantages, printing and forming of a hollow structure or a spatial three-dimensional structure can be realized.

Description

technical field [0001] The invention relates to the technical field of 3D molding, in particular to a preparation method of a 3D printing component and a 3D printing space component. Background technique [0002] 3D printing, also known as additive manufacturing, is a technology that adds materials layer by layer through printing equipment to manufacture three-dimensional objects based on a pre-designed three-dimensional model. This technology integrates cutting-edge technologies in the fields of digital modeling technology, electromechanical control technology, information technology, material science and chemistry. It is a kind of rapid prototyping technology and is known as the core technology of the "third industrial revolution". The printing technology of thermoplastic resin is the main component, especially the printing technology of continuous fiber reinforcement shows a more prominent prospect with its excellent mechanics and high load-bearing capacity. [0003] At ...

AI Technical Summary

Problems solved by technology

[0003] At present, the printing method of continuous fiber reinforced 3D has good advantages in printing planar structure or simple structure, with high tensile strength and modulus, but it is difficult to use continuous fiber as 3D printing raw material in non-printing plane. Add fibers; in this case, if only relying on the adhesive force of resin, compared with fibers, there will be a significant difference in load bearing, thus restricting the application of continuous fiber printed parts on structural parts

At the same time, because the wire contains continuous fibers, it is difficult to use 3D printing technology when forming spatial components (such as lattices), which limits the application of continuous fiber printing technology in lightweight structures or hollow structures.

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