@article{oai:kansai-u.repo.nii.ac.jp:00011572, author = {黒川, 豊 and 水田, 豊昭 and 矢尾井, 潤 and 太田, 英明 and 三宅, 秀和}, issue = {5}, journal = {鋳造工学}, month = {}, note = {As a result of Analysis of green sand properties on 100 lines of system sand in 1985 and 1998 respectively, it showed a tendency that green sand, analyzed in 1998, had lower compactability and higher strength compared with those in 1985. Also lower deviation was recognized. So it can be said that green sands in 1998 have changed to higher quality one with better flowability, while they are almost same properties among them. This change corresponds to an improvement of recent molding machine which have higher productivity and better dimensional precision. Green sand properties in 1998 were assorted into each type of molding machine. As a result, it has experienced that hey have such properties as higher strength in case of shock wave type of molding machine. Then, green sand control indexes for each molding machine have been obtained. The relationship between green sand properties and additional volume of green materials, used volume of core sand, and sand-metal ratio were checked. As a result, additional volume of each green materials such as bentonite, starch and sea coal has been able to be calculated by remained volume of each materials, used volume of new sand and core sand, and sand-metal ratio. Then, objective standard of judgment for additional volume has been clear by comparing calculated and measured volume.}, pages = {346--350}, title = {生型砂特性の統計解析}, volume = {72}, year = {2000} }