Abstract: A process for counter gravity sand casting including providing precision cores in a sand mould supported in a casting machine for rotation about a horizontal axis through the center of the mould, providing primary casting risers fed by a launder section, a pressure riser connected to the launder section and the primary risers, rising upwardly beside the mould, whereby on rotation the molten metal in the pressure riser will maintain an internal constant pressure in the mould until the casting risers are upper most, so as to maintain the internal pressure during the cooling of the mould.

Abstract: An engine block mold, including at least one barrel slab core (10), the or each barrel slab core (10) including a slab portion (12), and at least one barrel portion (14) adapted to receive a cylinder liner (1), wherein the barrel portion (14) of the or each barrel slab core (10) has an outer diametral taper along at least a portion of its length, and the or each liner (1) has a substantially matching internal diametral taper along at least a portion of its length. Inserting the or each slab barrel core (10) with the or each liner (1) disposed upon it, into a substantially completed mold casing, filling the mold, and then machining the cylinder liners (1) so that they have a substantially constant internal diameter along their length.

Abstract: A process for counter gravity sand casting including providing precision cores in a sand mould supported in a casting machine for rotation about a horizontal axis through the center of the mould, providing primary casting risers fed by a launder section, a pressure riser connected to the launder section and the primary risers, rising upwardly beside the mould, whereby on rotation a the molten metal in the pressure riser will maintain a internal constant pressure in the mould until the casting risers are upper most, so as to maintain the internal pressure during the cooling of the mould.

Abstract: The present invention relates to casting and more particularly to an improved apparatus and method of aluminum casting. The casting system 10 includes a furnace 12, a pump 14 and a mold 16. A semi-permanent mold cope 30 is mounted to the top of the mold 16 to quickly cool the adjacent portion of the casting 20. The semi-permanent mold cope 30 is movable with respect to the mold so that it can be moved between an open and closed position. The mold 16 can be brought to the semi-permanent mold cope 30 when the semi-permanent mold cope 30 is open and the semi-permanent mold cope 30 can then be closed onto the casting 20. The molten metal is then pumped into the mold 16 with the semi-permanent mold cope 30 in place. A laser 34 monitors the rate of mold fill by monitoring the fill rate of the riser 28.