English
+86-574-87410555
English
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 developped a machining line to machine parts we could not reach by investment casting.
Tongda investment casting foundry can supply you with the below investment casting services.
Normally,our customers pay more attention to whether we could make investment castings they need.In fact,even the best casting foundry could also make out unqualified products.So we also need to do quality control of investment castings to serve our customer better.
The surface of investment castings would be oxidized for high temperature during metal liquid pouring and solidification process.As the oxide layer is uneven and metal oxide on the casting surface would have effect on oxide in shell.Prompting uneven falling from of investment casting surface,which will obviously add the surface roughness of investment castings.
Tongda foundry has the ability and skills to deliver investment castings for oil and gas industry.We have been supplying quality investment castings to the oil and gas industry for more than 30 years.As these investment castings are used in high temperature and high working power,so they encounter hard working conditions(water,mud,crude,ect).
Lost Foam casting is, in terms of casting processes, a relatively recent innovation that exhibits characteristics of both Investment casting and Sand Casting. It is a form of evaporative pattern casting where the pattern is of foam rather than wax. The foam pattern is covered in refractory material, as in investment casting, but the ‘shell’ is then surrounded by compacted un-bonded sand to give it strength. When molten metal is poured into the shell the foam pattern vaporises on contact. The result is a process that delivers the quality and accuracy of investment casting with the lower costs and greater flexibility of sand casting.
