Abstract: A sand blowing head includes an air accumulator above a tank in which a metered quantity of sand may be charged. The tank is charged when offset from the accumulator and is movable to a blowing position in which an upper tank inlet is aligned with a downwardly extending outlet from the accumulator. A seal between the inlet and outlet is provided.

Abstract: A moulding process includes closing a multi-part die onto hollow-forming members to produce a hollow core mould. The mould is used in the "cold" process to produce a hardened foundry core about the cavity-forming members. Parting the die causes the cavity-forming members and the hardened core to be pivoted so that the hardened core rests on a conveyor belt with the longitudinal axes of the cavity forming members aligned with the longitudinal axis of the conveyor belt and with the cavity forming members lying in respective slots in a web fixed transverse to the conveyor belt. Subsequent movement of the conveyor belt causes the web to abut the hardened core and to extract the cavity-forming member from the hardened core as the hardened core is moved on the conveyor belt. In a modification of the process, the cavity forming members are partly extracted from the hardened core before the pivoting movement takes place.