Abstract: A casting device for operating stably while suppressing leakage from a gap between a tip and a sleeve is disclosed. The casting device includes: a sliding member in the center of which a rod slides, and in which a gap is formed between the rod and the sleeve; a seal member arranged at an outer periphery of the sliding member; and a suction device for suctioning air inside the sleeve. When the seal member is positioned in a center section closer to a cavity than a pouring hole, and the air in a space between the sliding member and the tip is suctioned, the seal member assumes a first state in which the seal member adheres to the center section, and in the first state, the tip advances toward the cavity.

Abstract: Provided is a casting device that is able to operate stably while suppressing leakage from a gap between a tip and a sleeve. The casting device comprises: a sliding member in the center of which a rod slides, and in which a gap is formed between the rod and a sleeve; a seal member arranged at the outer periphery of the sliding member; and a suction device for suctioning air inside the sleeve. When the seal member is positioned in a center section closer to a cavity than the pouring hole, and the air in a space between the sliding member and the tip is suctioned, the seal member assumes a first state in which the seal member adheres to the center section, and in the first state the tip advanced toward the cavity.

Abstract: A liquid feeding pump includes two coaxial cylinder chambers, a piston mounted in each chamber, and a piston rod connecting the pistons. A head side of one cylinder chamber functions as a liquid chamber, a rod side functions as a first air chamber, a rod-side of the other cylinder chamber functions as a second air chamber, and a head side functions as a third air chamber. The liquid chamber is formed with liquid inlets or outlets. Each of the air chambers is formed with air inlets or outlets, a part of the supplying pipes connected to the liquid inlet or outlet of the liquid chamber is wound around an outer periphery of the other cylinder chamber, or a peripheral wall of the other cylinder chamber is formed with a liquid cooling chamber and supplying pipes communicated with and connected to the liquid inlets or outlets of the liquid chamber are connected to the liquid cooling chamber.