B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/178
B29D 30/06 (2006.01) B29C 45/26 (2006.01)
Patent
CA 1061967
ABSTRACT OF THE DISCLOSURE: A casting or injection mold for vehicular tires comprises two separable half-shells together defining an annular cavity into which a segmented core is introduced, radially inwardly converging core segments alternating with parallel-sided or radially inwardly diverging core segments to facilitate extrac- tion of the core from the molded tire. In operation, one or more of the non-converging segments are immobilized within the mold, with the aid of mating formations on these segments and on the two half-shells, while the converging segments are ur- ged radially inwardly by resilient or fluidic forces. In a specific embodiment these forces are supplied by a contractile an annular spring with projections received in axially ex- tending undercuts of all the segments.
248722
Drum Adam
Grunner Erich
Lenk Gerhard
Schmidt Oskar
Tompich Horst
Na
Polyair Maschinenbau Ges.m.b.h.
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