Apparatus for use in centrifugal moulding

Claim 1

Apparatus suitable for use in producing a mould for use in centrifugal moulding, which apparatus comprises a drivable turntable having a central axis about which it is rotatable and a moulding case securable on said turntable for spinning about said central axis, said moulding case comprising an upper plate and a lower plate, each said plate having a central opening therethrough on said axis, and spacing means between and engaging the facing surfaces of said plates to define the outer periphery of a moulding chamber, the top and bottom of which is defined by said plates and which communicates with said openings, the openings in the two plates being identical whereby the moulding case is reversable on the turntable, the opening in the lower plate being closed by said turntable and the opening in the upper plate being adapted for receipt of moulding material, said spacing means comprising a pair of similar spacing rings, one of said spacing rings having an upper surface engaging the facing surface of the upper plate and the other of said rings having a lower surface engaging the facing surface of said lower plate, the spacing rings being separable from each other at a location spaced from the facing surfaces of the upper and lower plates to permit the moulding of two separable upper and lower mould halves in the moulding chamber.