Unbonded sand - Lost Foam process

3 D-CAD product Splitting of design into design foam pattern sections 

Manufacture of Manufacture of foam Assembly of foam pattern 

Ceramic coating Diy coated cluster Sand filling and compaction of cluster 

The sand, mostly quartz, needs to be very permeable, in order to ensure the evacuation of the pyrolysis gases. Sand with an AFS-number of 35 - 50 is used. Interruption of the pouring may cause a collapse of the sand mould. Therefore an automatic casting system is often used. 

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Lost Foam process moulding technique using foam models in unbonded sand, in which the model is lost upon pouring of the metal, used for series production... 

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