Nylon powder material for selective laser sintering and preparation method of nylon power material

Abstract

The invention provides a nylon powder material for selective laser sintering and a preparation method of the nylon power material. The nylon powder material is prepared from, by weight, 50-80 parts of nylon powder, 1-20 parts of resin coloring agents, 0.05-2 parts of dispersing agents, 0.1-1.5 part of surface modification agents, 0.5-2 parts of antioxidants and 0.1-1.5 parts of light stabilizers. The nylon powder material for selective laser sintering is colored. The colored nylon powder material can directly form 3D printed products uniform in luster and different in color through the SLS technology under the condition that the printed products do not need to be post-processed, and different requirements of clients in various fields for product colors can be met.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a nylon powder material for selective laser sintering and a preparation method thereof. Background technique [0002] Selective Laser Sintering (SLS) technology is a kind of rapid prototyping & manufacturing (RP & M) technology, which is a kind of computer-aided design and manufacturing, using the principle of layered superposition manufacturing, directly forming powder materials into three-dimensional Solid parts are not limited by the complexity of the shape of the formed parts, and do not require any tooling and mold technology. SLS technology forming materials are very extensive, including polymers, metals, ceramic powder materials, etc. Compared with metals and ceramic materials, polymer materials have the advantages of low laser sintering forming temperature, low laser power required, and high precision of sintered parts. It is the earliest, most widely used and most s...

AI Technical Summary

Problems solved by technology

However, for nylon materials used in SLS technology, due to the limitation of its powder-making process (solvent precipitation method), it is more difficult to color in the raw material molding stage

Therefore, at present, the parts prepared by SLS technology are all the original color of nylon powder material, which is white, and the color is relatively single. Usually, in order to meet the requirements of product appearance in various fields, it is necessary to carry out post-coloring treatment on SLS parts. Generally, the following two methods are used: Method: 1. Choose water-soluble / oil-soluble dyes for soaking and dyeing. The coloring effect is affected by the solubility and dispersion of the dyes, and it is easy to have different shades of color, or even decolorization; 2. Spray paint on the parts. Generally, in order to improve the tinting strength of the surface of nylon parts, it is necessary to spray a layer of primer first, and then spray the surface paint. This method will easily cause the size of SLS parts to be too large, and it is not easy for parts with high dimensional accuracy requirements. use this method

The above two methods consume a lot of people, time and cost, and the coloring effect is also uneven

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