Process for manufacturing cores and moulds

摘要

In the manufacture of cores and moulds, an inflatable pattern for use in the production of a foundry mould with a fluidal moulding material. The pattern includes a thin-walled flexible body having inlet means for the admission of gas. In addition, the thin-walled body is made from either elastomers or extendible plastics and is preshaped and dimensioned so that in its inflated condition the pattern defines the desired profile for the moulding material.