The invention provides a preparation method of a nylon
polymer powder material. The preparation method comprises the following steps: adding the following components into a polymerizing pot in percentage by
mass: 85-99.9% of nylon aggregate and 0.1-15% of a thermal medium material, adding a
solvent, and preparing a nylon
powder material taking the thermal medium as a nucleating agent by adopting asolvent
precipitation method; adding 20 parts of nylon
powder material and 0.1-1.5 parts of
carbon black into a
mixing tank, and performing the first high-speed mixing so as to prepare a nylon and
carbon black mixed powder material; adding the nylon and
carbon black mixed powder material, 0.1-1 part of a flow
promoter and 80 parts of the nylon powder material into the mixed powder
barrel, performing the second high-speed mixing and screening, thereby obtaining the nylon
polymer powder material. By adopting the nylon powder taking the thermal medium material as the nucleating agent and the high-speed mixing, the carbon black is uniformly attached onto the nylon powder surface, so that the nylon powder in the prior art is applied to
fiber laser sintering, the surface quality of the parts isexcellent, the structure is fine, and the overall performance is excellent.