山东快速成型技术通过与精密铸造、机械加工等制造手段相结合，已经成为模型和零件制造的有效方法，在航空、汽车、电子、军事装备、建筑模型等领域得到了广泛应用。下面就来讲讲快速成型技术在熔模精密铸造中的应用内容吧。

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.

选择性激光烧结技术

Selective laser sintering technology

选择性激光烧结技术成型过程与零件的复杂程度无关，是真正的自由成型。SLS几乎可以成型任意几何外形的零件，对中空结构（hollowedareas）、槽中套槽（notcheswithinnotches）及悬臂结构（overhangs）等结构的零件成型特殊有效。

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.

选择性激光烧结通常采用塑料、金属、陶瓷的粉末作为成型材料。其工艺过程是：先在工作台上铺上一层粉末，在计算机掌握下用激光束有选择地进行烧结（零件的空心部分不烧结，仍为粉末材料），被烧结部分则固化在一起构成零件的实心部分。一层完成后再进行下一层，新一层与其上一层牢牢地烧结在一起。全部烧结完成后，去除多余的粉末，便得到烧结成的零件。

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.

选择性激光烧结采用PSB粉料在熔模精密铸造上的应用

Application of PSB powder in investment casting by selective laser sintering

目前，熔模精密铸造在生产结构复杂，用模具几乎无法实现产品时通常采用快速成型制作其生产所用的蜡模。采用选择性激光烧结与熔模精密铸造结合在一起解决生产难题的方法已经得到了很好的应用。即用PSB粉烧结成的零件用毛刷及其它专用工具将零件上的浮粉，终用压缩空气将残余的粉末吹掉。

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.

说明：激光功率的大小影响成型零件的强度和变形，激光功率高，成型零件的强度高，但激光功率过高在烧结过程中会引起变形，一激光功率设定为12.5～15W（实际激光功率设置参数近似为总功率百分比，所以10～20W大致对应为20%～40%）。

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%).

快速成型技术在熔模精密铸造中的应用相关内容就到这里了，如果您对此有什么疑惑或者说什么想法，都可以来我们网站http://www.metferro.com咨询了解更多。

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.metferro.com Consult to learn more.