| 摘要 |
PCT No. PCT/JP81/00163 Sec. 371 Date Dec. 16, 1982 Sec. 102(e) Date Dec. 16, 1982 PCT Filed Jul. 15, 1981 PCT Pub. No. WO83/00301 PCT Pub. Date Feb. 3, 1983.This invention relates to a metal mould for use in die casting. Such a metal mould is required to have a venthole arrangement through which a gas within a cavity is discharged out of the metal mould as molten metal is poured into the cavity. The invention is characterized by a venthole arrangement which comprises inclined grooves (5, 6) being formed in the facing surfaces of two half portions (1, 2) of the metal mould having the cavity defined therebetween, communicating with the cavity and a safe cavity (7), and inclining in a direction opposite to each other. With the arrangement of the invention, a gas can be effectively discharged out of the metal mould without spouting out molten metal.
|
