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1. 发明专利

GB765340A Improvements relating to the manufacture of pipes by the centrifugal spinning process 未知
公开(公告)号：GB765340A
公开(公告)日：1957-01-09
申请号：GB2202953
申请日：1953-08-10
申请人： NORCON LTD
发明人： BETESTA ARTHUR WILLIAM
IPC分类号： B28B21/80
摘要： 765,340. Centrifugal-moulding machines. NORCON, Ltd. Aug. 10, 1954 [Aug. 10, 1953], No. 22029/53. Class 87(2). A pipe-casting mould in two semi-circular parts having flanges by which they are bolted together and belled or flared at one end to form a socket end of the pipe has a rim or flange at each end to which is fixed a master ring which is rotated and which carries pipe end shaping members. The mould is belled or flared at one end, as shown at the lift in Fig. 3, and circumferential L-sectioned rims 8, 9 are riveted on the outside of the mould on the two ends and the master rings 10, 11 are bolted to them, their outer circumferential surfaces being shaped to engage driving members (not shown) to rotate the mould. Two pairs of inset members are shown, one, 12, 13, being used to adapt the mould for the formation of a self-inverting pipe and the other 14b, 15, being for a flexible joint pipe. The inset 12 forms, between its outside face and the flared inside end of the mould, a pipe socket of stepped form, and the inset 13 forms a stepped spigot to fit into a socket of the shape mentioned. The inset 15 for forming the spigot end of a flexible joint pipe adapted to a socket end as formed by the inset 14b is a thin ring adapted to spring in between the mould end and the inside of the flange on'the end of the master ring 11. The ring insets can be changed without changing the master rings, whereby pipes with ends of varying forms can be moulded in the same mould.

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