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후란자경성 (自硬性) 주형용 (鑄型用) 국산인조규사의 (國産人造硅砂) 활용에 관한 연구
최창옥,이상윤 ( Chang Ock Choi,Sang Yun Lee ) 한국주조공학회 1981 한국주조공학회지 Vol.1 No.3
N/A An emphasis has been placed on the importance of selecting a sand for furan sand process, which ie affected by the properties of sand. Investigations have been carried out to use the domestic artificial sands for the furan sand process. For laboratory investigations, the sands have been prepared and tested for chemical analysis, loss on ignition, sieve analysis, AFS grain fineness number, grain shape, PH value, acid demand, surface shape, theoretical surface area, moisture absorption, crushing durability and compressive strength and S. S. I. of molding sands. Most commercial sands have been found to be able to be used. The main requirement of the sands has been shown to be that 3 or 4 screen sands, AFS no.40-70 (or 100), of low acid demand, good surface area and good grain shape require less resin and catalyst to give an adequate strength.