| 主权项 |
1. A casting die assembly comprising:
a first die and a second die, which face each other and are configured to be movable toward and away from each other; wherein at least one of the first die and the second die includes: a cavity die; a plate-shaped base having a flat attachment surface to which a rear surface of the cavity die is attached; and a flange that projects from the base toward the cavity die, abuts against a side surface of the cavity die, and extends over a full width of the base; and a joint member joining the flange and the cavity die to each other; wherein a main die body formed of the base and the flange is substantially L-shaped as viewed in side elevation; the base includes a region held in contact with the rear surface of the cavity die; the region having: a support configured to support the cavity die; and a pressure boosting unit configured to increase a pressure applied through the support to the cavity die when the first die and the second die are combined with each other; wherein the pressure boosting unit has a deformable portion, which is less rigid than the support, the deformable portion being configured to be elastically deformed to become convex away from the cavity die when the first die and the second die are combined with each other; wherein: the flange has a first surface facing the cavity die, and the first surface has a first recess in which a portion of a sprue sleeve or a portion of a sprue pin is disposed; the cavity die has a second surface facing the flange, and the second surface has a second recess in which another portion of the sprue sleeve or another portion of the sprue pin is disposed; and when the sprue sleeve or the sprue pin is disposed in the first recess and the second recess, the cavity die is positioned with respect to the base along a direction perpendicular to a direction in which the flange projects, and perpendicular to a direction in which the first surface faces. |
