Preparation method of high-molecular nylon powder material used for 3D printing

Abstract

The invention discloses a preparation method of a high-molecular nylon powder material used for 3D printing. The method comprises the following steps: 1)placing a nylon material, a nucleating agent and alcohol in a high pressure reaction vessel; 2)operating the high pressure reaction vessel for stirring, introducing nitrogen for protection, heating the material in the high pressure reaction vessel to 130-160 DEG C; 3)insulating and dissolving, insulating the reaction vessel for 2-3 hours, fully stirring, dissolving the nylon material; 4)cooling, depositing and precipitating, controlling the stirring speed of the high pressure reaction vessel, slowly cooling, and gradually completing the precipitation and moulding of the nylon powder; 5)filtering, cooling the material in the high pressure reaction vessel to less than 70 DEG C, transferring the mixture to a filter tank, separating the solvent from the solid; 6)centrifuging, transferring the filter residue to a centrifuge for removing the solvent; 7)drying under vacuum; thoroughly removing the solvent in a vacuum drying machine; and 8)sieving the dried nylon powder, and controlling the particle size of nylon powder at 35-50 mum to obtain the required material.

Description

Technical field: [0001] The invention relates to the technical field of 3D printing materials, in particular to a method for preparing a polymer nylon powder material for 3D printing. Background technique: [0002] 3D printing technology is a rapid prototyping technology that has developed rapidly in recent years. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. [0003] 3D printing can be used in mold manufacturing, industrial design and other fields to make models, and is gradually used in the direct manufacturing of some products. There are already parts printed using this technology. The technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, and other fields. [0004] According to the...

AI Technical Summary

Problems solved by technology

When this material is used, it is sprayed out by the material printing nozzle after thermal melting. The precision of the product printed by this printing process is not high, and the surface smoothness is not enough, so it can only be used for general product printing. For industrial-grade 3D printing materials As far as the country is concerned, the current domestic market is still in a blank area.

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