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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.
Shell mould casting is one technology of casting. Products are casted from thin cast shells directly. Materials include carbon steel, alloy steel, etc. can all be casted in shell mould casting process.
1.A foam pattern (see images above) is made using expanded Polystyrene (2.5% Polystyrene, 97.5% air). This can be formed by closed-die moulding, machining or assembly from multiple parts. Risers and gates are included at this stage.
