@article{oai:niigata-u.repo.nii.ac.jp:00002932, author = {渡辺, 孝一 and 大川, 成剛 and 金谷, 貢 and 中野, 周二 and 宮川, 修 and 小林, 正義}, issue = {6}, journal = {歯科材料・器械, 歯科材料・器械}, month = {Nov}, note = {U字型キャビティにチタンを鋳込み, 標識元素による湯流れ観察と, X線透過像による欠陥検査を行った.これらの結果を基に, 差圧鋳造と遠心鋳造の違い, スプルー直径やその植立条件が充満過程へ及ぼす影響を検討した.ほとんどの場合, スプルーから噴流として流入し, 咬合面部はF型で充満することが確認された.脚の部分では, 差圧鋳造ではB型.遠心鋳造ではF型の充満であった.内部欠陥に関しては差圧鋳造の場合はスプルー線の太さ, 遠心鋳造の場合はスプルー線の植立位置および角度が重要な因子であることが推定された., By combining information from X-ray transparency and from molten titanium flow, the casting process in a U-type cavity simulating crown section was investigated under several conditions, such as type of casting machine or sprue diameter. Despite the machine type, centrifugal(CT) or two-chamber pressure(PR)machine, jet flow and F type filling were observed in the occlusal area. The flow pattern in the axial area, however, was controlled by the main body force of each casting machine; it was the B type for PR and the F type for CT. Major factors related to internal defects were sprue diameter for PR and sprue-attachment position and angle for CT.}, pages = {532--539}, title = {U字型キャビティ内のチタン湯流れ}, volume = {15}, year = {1996} }