Improvements relating to the manufacture of cast iron pipes such as rainwater and soil pipes

摘要

868,655. Centrifugal casting. MACFARLANE & CO. Ltd., WALTER. March 11, 1960 [March 13, 1959], No. 8816/59. Addition to 808,573. Class 83 (1). In the method of centrifugally casting cast iron pipes with an ear or ears as claimed in the parent Specification, the metal mould is provided with an internal compacted liner of clay bonded or green sand. The socket core may be shaped to form a double ear 20 extending transversely of the socket and joined thereto by webs 23.