RESIN-COATED SAND HAVING IMPROVED MOLD COLLAPSIBILITY

RESIN-COATED SAND HAVING IMPROVED MOLD COLLAPSIBILITY

To provide a resin-coated sand (RCS) that makes it possible to shape, in practically advantageous manner, a mold having improved collapsibility after casting, while having improved molding properties.SOLUTION: Refractory aggregate and a resin binder are mixed, to coat the surface of the refractory a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OGAWA FUMIYUKI, IWAKIRI SHUN
Format: Patent
Sprache:eng ; jpn
Schlagworte:
CASTING
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Beschreibung
Zusammenfassung:To provide a resin-coated sand (RCS) that makes it possible to shape, in practically advantageous manner, a mold having improved collapsibility after casting, while having improved molding properties.SOLUTION: Refractory aggregate and a resin binder are mixed, to coat the surface of the refractory aggregate with the resin binder, forming the RCS. The refractory aggregate contains 50 mass% or more of SiO2 and has a filling factor of 53% or more, and the RCS has a thermal conductivity of 0.30 W/m K or more.SELECTED DRAWING: None 【課題】鋳型特性の向上を図りつつ、鋳造後における鋳型の崩壊性がより一層高められ得た鋳型を、実用的に有利に造型することの出来るレジンコーテッドサンド（ＲＣＳ）を提供する。【解決手段】耐火性骨材と樹脂粘結剤とを混練して、かかる耐火性骨材の表面を樹脂粘結剤にて被覆してなるＲＣＳにおいて、かかる耐火性骨材が、５０質量％以上のＳｉＯ2を含有し、充填率が５３％以上であると共に、ＲＣＳが、０．３０Ｗ／ｍ・Ｋ以上の熱伝導率を有していることを特徴とする。【選択図】なし