Method and apparatus for producing one or more hollow sand cores suitable for casting moulds

摘要

An apparatus and method for producing one or more hollow sand cores suitable for casting moulds using a bipartite core box defining a mould cavity into which sand and a catalyst or a curing agent are introduced. The method includes the steps of establishing a pressure gradient which decreases from the interior to the exterior of a non-heated core box of porous material; introducing sand and a catalyst or a curing agent into the mould cavity defined by the non-heated core box; and directing the introduced sand and catalyst or curing agent against the interior surface of the non-heated core box, which step of directing, at least in part, is obtained by the pressure gradient established between the interior and exterior of the non-heated core box. The apparatus provides structure for accomplishing the above described method.