Tilt casting apparatus and tilt casting method

A tilt casting apparatus, comprising:

• a tilt casting mold that includes a cope and a drag, in which when the cope and the drag are combined, a predetermined cavity is formed therein and a riser is formed on a side of the cavity, a pouring cup is coupled to a surface having the riser of the drag, molten material is injected into the pouring cup and then the molten metal in the pouring cup is injected into the cavity by tilting a mold assembly composed of the cope, the drag, and the pouring cup;
• a tilting apparatus injecting molten metal into the cavity by tilting the tilt casting mold at a predetermined speed;
• and
• a pressing apparatus pressing the riser,
• wherein the pressing apparatus includes:
• a riser cover formed to accommodate the outer surface of the riser of the tilt casting mold and forming a predetermined sealed space including the riser by being fixed to the tilt casting mold;
• and
• a piston accommodated inside the riser cover and pressing the riser in the sealed space formed by the riser cover fixed to the tilt casting mold, in which the pouring cup is separated after the molten metal is injected into the cavity by operating the tilting apparatus and the riser is pressed by the piston after the riser cover is fixed to the tilt casting mold to accommodate the riser, and
• the tilt casting apparatus further includes a hydraulic apparatus pressing the riser cover, the piston, the cope, and the drag through a single hydraulic circuit,
• wherein the hydraulic apparatus is controlled such that {circle around (1)} the magnitude of the pressure applied to the tilt casting mold by the riser cover is larger than the magnitude of the pressure applied to the molten metal by the piston and {circle around (2)} the magnitude of the pressure applied to the cope and the drag is larger than the magnitude of the pressure applied to the riser cover.