1.What is investment casting?
Investment casting is also called as precision casting, with processes of mould making, wax injection, wax tree assembling, metal melting, pouring, clearing, heat treatment,ect.
2.What are the main differences between investment casting and sand casting?
Investment casting is suitable for small castings from 0.1kg~80kg with high accuracy on dimensions. However,we prefer sand casting process to make bigger parts, which the surface is relatively rough.
3.What materials are commonly used in investment casting process?
Steel:Alloy steel,carbon steel,stainless steel.
Iron:Gray iron,ductile iron.
4.Does lost wax casting belong to investment casting?
Yes,besides lost wax casting,lost foam casting also belongs to investment casting.
5.How long does it usually take to make pattern and samples? How about mass production?
It usually takes 30-40 working days to make pattern and samples. And another 30 working days for mass production after sample is approved.
6.How could Tongda foundry ensure good quality of investment castings?
First of all,all the engineers and technicists have rich theory and practice experience in our foundry.Secondly,we will make a strict quality control procedure for each production step.When our sample is finished,we will test samples ourselves and size report&material report could also be offered.Beside,sample could also be sent to our customers directly for inspection.If there is any quality problem,we will resend to you until approved.
7.What is the payment terms of Tongda foundry for investment casting?
100% payment of tooling cost prepaid with order by T/T,30% payment of production paid by T/T after our sample is approved,balance 70% payment paid once you receive the copy of faxed bill of lading.