국산 벤토나이트를 사용한 시스템사의 성질에 미치는 증자사의 영향에 관한 연구

Effect of Core Sand on the Properties of System Sands Using Domestic Active Bentonite

  • 천병욱 (동아대학교 금속공학과) ;
  • 최창옥 (동아대학교 금속공학과)
  • 발행 : 1989.10.20

초록

This study has been carried out to investigate into the properties of molding sands containing various core sands, $CO_2$, Shell, Furan, Pep Set and Cold Box, in the system sands using domestic active bentonite. The properties of system sands with 5% bentonite and 3% moistures containing baked core sands and no-baked core sands were varied by the ratio of core sands. The system sand containing no-baked core sands had been the poor bonding force and rough grain surface than those of the baked core sands. The L. O. I of system sand containing 30% organic binders core sands were more than inorganic binders core sands. It has been found that the no-baked core sands were necessary have to reclaim for using molding sand.

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