Shandong rapid prototyping technology, combined with precision casting, machining and other manufacturing means, has become an effective method for model and part manufacturing, and has been widely used in aviation, automobile, electronics, military equipment, building models and other fields. Let's talk about the application of rapid prototyping technology in investment casting.
Selective laser sintering technology
The forming process of selective laser sintering technology has nothing to do with the complexity of parts, and it is truly free forming. SLS can form parts with almost any geometric shape, and is particularly effective for forming parts with hollow structures, notches within notches and overhangs.
Selective laser sintering usually uses plastic, metal and ceramic powders as molding materials. The technological process is as follows: first, a layer of powder is laid on the workbench, and then the laser beam is used to selectively sinter (the hollow part of the part is not sintered, but is still powder material) under the control of the computer. The sintered parts are solidified together to form the solid part of the part. After the completion of one layer, the next layer shall be carried out, and the new layer shall be firmly sintered with the previous layer. After all sintering is completed, the excess powder is removed to obtain the sintered parts.
Application of PSB powder in investment casting by selective laser sintering
At present, when the production structure of investment casting is complex and the products can hardly be realized with the mold, the wax mold used in the production is usually made by rapid prototyping. The method of combining selective laser sintering with investment casting to solve production problems has been well applied. That is, the floating powder on the parts sintered with PSB powder is removed with a brush and other special tools, and the residual powder is finally blown off with compressed air.
Note: the size of laser power affects the strength and deformation of formed parts. High laser power has high strength, but too high laser power will cause deformation during sintering. The first laser power is set to 12.5-15w (the actual laser power setting parameter is approximately the percentage of total power, so 10-20w roughly corresponds to 20% - 40%).
This is all about the application of rapid prototyping technology in investment casting. If you have any doubts or ideas about this, you can come to our website http://www.jrjmockup.com Consult to learn more.