Toyota Jidosha Kabushiki Kaisha

Hidehiko Kadono

Atsushi Ota

Hiroaki Mori

Shinichi Yoshida

Seizi Uda

Mitsuhiro Karaki

Shingo Nakamura

Yasuhiro Yamashita

Hideaki Sukesada

Seiji Uda

Masatada Nakamichi

Tadaaki Togashi

A cavity defined by a casting mold is filled with a molten metal in such a condition that a sliding member movable forward and rearward has been moved into the cavity. The sliding member is drawn out of the cavity when the molten metal solidifies to such a degree as to maintain a certain shape. A separate member to be force-fitted is placed between the distal end of the sliding member and the cavity. The sliding member is then advanced into the cavity so that the separate member is force-fitted into a concave portion formed in the casting before the casting mold enclosing the casting is opened. The separate member is thus force-fitted into the casting while the casting is enclosed in the casting mold.

Method of force-fitting separate member into casting and apparatus

A process for casting a pipe such as a delivery pipe with transversal holes, the pipe having an elongate longitudinal hole and at least one pair of transversal holes communicating with the longitudinal hole in a substantially normal direction thereto. The process comprises the steps of positioning a rod-like center pin for forming the longitudinal hole in a predetermined positional relation to a cavity formation surface of a casting die, positioning a pair of mandrel pins for forming the pair of transversal holes such that end faces thereof are in contact with side surfaces of the center pin, and charging molten metal into a die cavity after the center pin and the pair of mandrel pins have been positioned. The molten metal is charged under the condition that the center pin is prevented from deforming by the pair of mandrel pins.

Process for casting pipe with transversal hole, and casting die for the

A method of casting a pipe having an axially elongate hole of which a front end is closed, comprises the steps of positioning a rod-like center pin for forming the blind hole in a predetermined positional relation to cavity defining surfaces of a die cavity, supporting the positioned center pin sidewise with a support pin to prevent positional deviation of the center pin, charging molten metal into the die cavity, retreating the support pin apart from the center pin, and replenishing a space formed by the retreat of the support pin with molten metal.

Method of and apparatus for casting pipe

A casting mold includes a cavity formed therein, and an auxiliary mold projecting into the cavity. The auxiliary mold forms a concave portion in a cast product, and it exhibits a thermal expansion coefficient being more than a thermal expansion coefficient exhibited by a molten metal to be charged into the cavity. Hence, the auxiliary mold greatly expands thermally during casting, and it keeps the expanded state during the solidification of the molten metal. Accordingly, the casting mold can prevent the casting defects resulting from the shrinkage cavities from arising in the resulting cast products. All in all, the casting mold can obviate to give the auxiliary mold a tapered configuration, and it can reduce the after-casting machining allowance to be provided in the resulting concave portion.

Casting mold

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Toyota, Japan

Hidehiko Kadono