GAS DRAINAGE DEVICE FOR MOLD

To provide a gas drainage device for a mold suppressing the infiltration of a molten metal into a gap between the outer circumferential face of a pressure receiving pin 8 and the inner circumferential face of a fit hole 9a to be fitted with the pressure receiving pin 8 as much as possible.SOLUTION:...

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Bibliographische Detailangaben
Hauptverfasser:	OISHI HIROKAZU, NAKAHARA YUKI, SHIRAKAMI TOMOYUKI, KANEKO TETSUYA, ITO KEIICHI, YAMAMOTO HIROSHI, MURAO YUSAKU
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES FOUNDRY MOULDING PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING
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Beschreibung
Zusammenfassung:	To provide a gas drainage device for a mold suppressing the infiltration of a molten metal into a gap between the outer circumferential face of a pressure receiving pin 8 and the inner circumferential face of a fit hole 9a to be fitted with the pressure receiving pin 8 as much as possible.SOLUTION: The tip face as the edge face on the side of an exhaust passage 4 of a pressure receiving pin 8 is formed with a columnar recessed part 8c whose inside diameter is fixed in the axial direction of the pressure receiving pin 8 concentrically with the pressure receiving pin 8, and the recessed part 8c is formed in such a manner that the 1/2 of a value obtained by subtracting the inside diameter of the recessed part 8c from the outside diameter of the pressure receiving pin 8 is controlled to the higher than zero and also reaches a prescribed value or lower.SELECTED DRAWING: Figure 2 【課題】金型用ガス抜き装置において、受圧ピン８の外周面と受圧ピン８が嵌合する嵌合孔９ａの内周面との間の隙間に溶湯が入り込むのを出来る限り抑制する。【解決手段】受圧ピン８の排気通路４側の端面である先端面に、該受圧ピン８と同心状に、該受圧ピン８の軸方向に内径が一定の円柱状の窪み部８ｃを形成し、この窪み部８ｃを、受圧ピン８の外径から窪み部８ｃの内径を引いた値の１／２が、０よりも大きくかつ所定値以下になるように形成する。【選択図】図２