Abstract
In Japan,the rice-bran open mould is used in the manafacture of wrought brass mill because the yield is increased as compared with an ordinary metal mould employed in making a large slab. A slight amount of unevenness and oxidation occurs on the surface of the melted in a mould. This surface,however,is never to be a casting fault,like oxide inclusions and gas cavities produced by a metal mould. In spite of the fact that rice-bran mould is widely used in small-scaleed plants of our country, studies on the said mould have not yet been carried out systematically. In the present paper, the authors treated this problem. (1) The stability of a mould is affected by moisture,hardness and amount of new bran added. (2) The permeability of a mould is affected by moisture and the property is improved in the case of moderate moisture and new mixture of bran. (3) The strength of a mould is affected by moisture rather than by the amount of new bran added.
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