@article{oai:niigata-u.repo.nii.ac.jp:00002934, 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 = {一室加圧型チタン鋳造機について, 欠陥の発生と鋳型内湯流れをX線透過法と標識元素溶解法とを用いて観察した.また湯流れと欠陥との関係を明らかにするため, 形状の異なる3種のワックスパターンを同時に埋没して鋳込んだ.通気性の影響を調べるため, 通気度が非常に異なる3種の埋没材を用いた.その結果, 鋳型通気度が大きいと, 厚いパターンでは内部に, 薄いパターンやメッシュパターンでは外部に欠陥が発生しており, それぞれキャビティ内湯流れに関係していた.また, 通気度の小さい埋没材を使用した場合, ほとんど欠陥が認められなかった., Casting defects and titanium flow using a one-chamber pressure casting machine were observed by the transparent X-ray method and molten tracer element method, respectively. To clarify the relation between casting defects and filling types, three types of wax patterns were invested at one time. To estimate the influence of mold permaebility, three types of investment which significantly differed in permeability were used. As a result, investments with high permeability cause many internal defects in thick plate castings and external defects on thin plate castings and mesh castings. These defects were closely related to the flow in the cavity. Low permeable investment caused few casting defects despite the cavity type.}, pages = {668--676}, title = {一室加圧型チタン鋳造機に関する研究 第2報 鋳型通気性が鋳造欠陥に及ぼす影響}, volume = {14}, year = {1995} }