Black oxide coating treatment is widely used as one kind of surface treatments for investment castings. Such surface treatment can help to an anti-rust layer to increase the lifetime and release the stress of the castings caused during hardening process. Surface of investment castings after black ox......

Lost wax casting is the main technology of investment castings.The engineers in Tongda foundry have been in this field for many years with mature technology.So we are in great confidence to ensure good quality.The main process of lost wax castings is:mould design--mould making--wax injection--tree a......

Lost foam casting process(LFC), also called type of evaporative pattern casting, is one technic of investment casting processes.The operating principle is, making foam models with same dimensions as actual products, assembling foam models by welding, painting the foam models with fire resistant mate......

Tongda foundry is professional on casting products in silica sol casting process. Silica sol casting is a typical investment casting process for stainless steel investment castings.The main process of silica sol casting is mould desigh & making--wax making--tree assembling--dewax--pouring--grinding-......

General investing casting processes contains five steps, wax injection, shell moulding, casting, surface treatment, and inspection. Below are the detail step descriptions of the investment casting processes.

Investment castings after casting process could only reach freedom tolerances itself.For more accurate tolerances,we have to meet by rough machining,some even require secondary machining.To serve our customers better,we have developed a machining line to machine parts we could not reach by investmen......