The commonly used methods of RP technology are (), (), () and ().

A: Layered solid manufacturing method, selective laser sintering method, fused deposition molding method and three-dimensional printing system method.

Analysis: First, the single-layer paper coated with hot melt adhesive is heated, bonded together by adding rollers, and the parts are cut by the above laser cutter according to the data obtained from the CAD layered model. This method does not need design support, only needs to cut the outline, does not need filling scanning, and has small warping deformation of parts and low manufacturing cost. However, the surface quality is poor, the garbage separation is troublesome, the material utilization rate is low, the types are limited, and the post-treatment is difficult.

Second, the selective laser sintering method is to use laser to sinter thermoplastic powder in layers and solidify and pile up to form parts. Its advantages are good mechanical properties and high prototype strength; There is no need to design and build a bracket; The mol material has wide selectivity and high utilization rate; The disadvantages are low precision, rough surface and post-treatment.

Thirdly, the filamentary material is heated in the nozzle to be slightly higher than the melting point, and it is in a semi-flowing state. It is extruded from the nozzle and solidified rapidly to form accurate layers, which are superimposed layer by layer and finally form a whole. Its advantages are high material utilization rate, low material cost, many optional materials and high speed. The disadvantage is that the precision is low, the cantilever part needs to be supported, and it is easy to get stuck during molding.

4. Using special powder materials and binders, the binders are selectively sprayed on the paved layer of powder materials with similar printing nozzles, so that the powders where there are binders are bonded together, and the rest are still powders, so that the layers are bonded to form a spatial entity. The advantages of TDP method are low cost and high speed. The main problem is rough surface.