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Vol.4, No.4, 116 ~ 128, 1966

Title

Study on the Mechanical Properties for Molding Sand Added with Bentonite as a Binder

이계완 , 이희관 Ke Wan Lee , Hey Kwan Lee

Abstract

For the time being, many foundry shops in our country have been used naturally bonded clay sand as a molding sand. It is difficult to improve the quality of casting with the naturally bonded clay sand mold, compared with synthetic sand added bentonite as a binder. Most of the foundry shops in the developed country have been used synthetic molding sand for about 30 years. Recently, some foundries in our country where produce malleable cast iron have been used synthetic molding sand and other foundry shops are planning to use it to decrease casting defects. It is important and necessary to study mechanical properties of molding sand added bentonite as a binder in the foundry industry in our country. In this study, the mechanical properties of synthetic molding sands with the various amount of domestic bentonite were examined and tested.

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