Process for producing a casting mould and cast members

Details Process for producing a casting mould and cast members Process for producing a casting mould and cast members

B - Operations, Transporting

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C

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B22C 5/12 (2006.01) B22C 9/00 (2006.01)

Patent

CA 1219728

ABSTRACT OF THE DISCLOSURE A process for producing a casting mold with chemi- cally bound moulding material using a pattern is intended to make it possible to forego the use of clay-bound sand, in particular for the mass production of cast members, and to provide a casting mould of adequate gas permeability, which is simple to produce, with a low level of consumption of moulding material, and inexpensive, and which also provides a high level of casting quality with a low degree of environ- mental pollution. For that purpose, the moulding material which has become pourable or fluid due to the operation of casting a cast member is removed from a first casting mould comprising a single moulding material, whereas the remaining portion of the moulding material is left, and the hollow space formed when the pattern is re-fitted is filled with moulding material. In addition, the moulding material which has been reduced in strength may be also removed, being for example blown or brushed out.

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