B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
25/75
B28B 21/22 (2006.01)
Patent
CA 1054781
Abstract of the Disclosure A tapered mould consisting essentially of a rigid outer frame formed of a set of radially arranged longi- tudinally extending guide members and a set of axially spaced encircling rings, and a gapped frustoconical tubular casing of resilient sheet material having a set of longitudinal stiffening members arranged thereon for sliding engagement with the respective guide members. The gap in the wall of the tubular casing, extending along a longitudinal line on the periphery of the casing, is opened and closed automatically as the tubular casing inserted in the outer frame is moved axially in opposite directions. Labor - consuming bolt - clamping and releasing operation is completely eliminated and the mould operation can be mechani- zed with ease, as desired. Packing means interposed bet- ween a pair of stiffening members arranged on the opposite sides of the gap further ensures leak - proof gap closing. Any accidental gap opening during casting operation can be prevented by arranging wedge means between one of the encircling rings on the outer frame and the two stiffening members.
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