Qingdao Refidus is supplying precise OEM investment casting parts for global valuable customers with strict quality standard.  We are manufacturing fasteners, for example investment casting butterfly screw nut.

Investment casting is a technology which producing complex shape and high surface quality parts. Our silica sol and water glass investment casting parts are used in farm machinery parts, chemical machinery parts, medical equipment components, auto parts, decorative accessories, etc.

Our investment casting tolerance is according to Germany investment casting tolerance standard VDG Merkblad P69 D1 level.  Surface roughness is Ra3.2.

Besides the basic casting process, we also provide various surface treatment and deep machining service.

Silica sol investment casting process: