Establishment of Casting Manufacturing Technology by Introducing Artificial Sand and Realizing Clean Foundry

Abstract

  In general, the working environment of foundries is bad compared to other manufacturing industries. To improve this, dust collection facilities are installed or improved. However, they cannot be installed in some factories. Therefore, we attempted to change the sand type from natural silica sand to artificial sand to improve the working environment. Before switching, we investigated the problems that occur when switched to artificial sand and external shrinkage problems were found. After taking countermeasures for the problem, we changed the sand type. As a result, it was possible to reduce the amount of dust in the working environment, and the control class prescribed by the Ordinance on Prevention of Dust Hazard could be reduced from 3 to 2.