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Shell moulding involves coating fine sand with resin and pressing it against a hot metal pattern to form a thin shell. Two shells are assembled around cores if needed and filled with molten metal. This produces castings with excellent dimensional accuracy and surface finish due to the fine sand and metal pattern. CO2 moulding also uses a chemical reaction between sodium silicate and CO2 to harden sand, eliminating the need to dry or bake moulds.

Author

suneel kumar rathore

Language

EN