B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/108
B29C 33/14 (2006.01) B29C 33/00 (2006.01) B29C 45/14 (2006.01) B29C 70/68 (2006.01)
Patent
CA 1237861
ABSTRACT OF THE DISCLOSURE The invention relates to molds adapted to receive and position a rigid seal casing element, normally an annular unit made from metal, and adapted to form contoured annular rubber sections lying along and having at least one surface bonded to such casing, while confining the elastomer to a carefully predetermined area. According to the invention, radially movable parts of the mold, upon mold closing, move slightly radially inwardly to urge a stamping skirt portion into snug relationship with a radially outwardly directed counterpart or cooperating surface of the mold core to form a flash barrier. The invention also includes a mold having a core element, with a portion thereof including surfaces defining part of a mold cavity, a multipart, segmented element resembling a collet or the like surrounding a portion of the core, with each of its elements or segments and having a radially inwardly directed land adapted to engage the skirt, exterior cam surfaces, a cam actuating unit, and one or more additional movable or stationary portions of the mold adapted to define the mold cavity, to locate the casing material or the like. Preferably at least one of these parts includes an additional ridge or land adapted to form another flash barrier with another part of the casing in the closed posi- tion of the mold.
483936
Chicago Rawhide Manufacturing Co.
Osler Hoskin & Harcourt Llp
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