Powder material used for 3D printing and powder 3D printing forming method

Abstract

The present invention relates to a powder material used for 3D printing and a powder 3D printing forming method. The surface of a powder sectional material is wrapped by a layer of binder, a printing spray head sprays a curing agent and do not need to spray the binder, thereby avoiding blockage of the printing spray head. By adoption of the powder material and the method, the technical problem that the 3D printing spray head is easy to block is solved, products with complicated structures can be printed, no complicated and expensive manufacturing equipment is required, the printing cost is greatly lowered, and application of the 3D printing technology is further popularized.

Description

technical field

[0001] The invention relates to solid forming technology, in particular to a powder material for 3D printing and a powder 3D printing forming method. Background technique

[0002] Selective Laser Sintering (SLS) is a commercial rapid prototyping method. Its working method is: first spread a very thin layer of powder evenly on the workbench, and the laser beam is selectively sintered according to the layered contour of the part under computer control, so that the powder is solidified into a cross-sectional shape. The working plane of the working cylinder is lowered by one layer thickness, and the powder spreading device spreads another layer of powder on the sintered surface for the next layer of sintering. This process is repeated until the entire 3D model is produced. After all the sintering is completed, the excess powder is removed, and then the required parts are obtained after grinding and drying. SLS can use a variety of powder materials, such as cer...