FACING SAND COMPOSITION AND METHOD OF INCORPORATION IN A MOLD

A sand casting facing composition comprises a dry mixture of about 77% fine sand, 5% binder, 6% green system sand and 12% burned system sand. The fine sand is mulled with 5.8% wt/wt oil per total dry mixture and cataly st at about 0.5% wt/wt. Preferably, fine sand and binder are mulled with oil, cat...

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Bibliographic Details
Main Author GOODWIN, THOMAS A
Format Patent
LanguageEnglish
French
Published 20.06.2004
Edition7
Subjects
CASTING
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
TRANSPORTING
WORKING CEMENT, CLAY, OR STONE
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Summary:A sand casting facing composition comprises a dry mixture of about 77% fine sand, 5% binder, 6% green system sand and 12% burned system sand. The fine sand is mulled with 5.8% wt/wt oil per total dry mixture and cataly st at about 0.5% wt/wt. Preferably, fine sand and binder are mulled with oil, catalyst, green system sand and screened burned system. The mulled mixture is rested, mulled again and rested again before use as facing sand for achieving accura te reproduction of the pattern's fine detail. A method of preparing the mold an d preserving fine detail comprises riddling the pattern with a thin layer of t he facing sand composition, compacting, riddling with dry system sand and riddling wit h system sand before compacting about the periphery of the pattern. Final laye rs of system sand are applied and compacted over the entire pattern.
Bibliography:Application Number: CA20022414798