Method of shaping a mould under a reduced pressure

摘要

A method of producing a reduced-pressure-shaped mould in which at least in the region of a sprue runner of the mould to be formed and in regions where a shield material for the mould material is likely to be destroyed during introduction of the molten material to be moulded, the mould material partially or entirely comprises moulding sand mixed with substantially 0.5% to substantially 3.0% by weight of binder.