Plastic article or earthenware shaping or treating: apparatus – Reshaping – resizing or vulcanizing means for tire – tire... – Sectional female mold including locking or clamping assembly...
Patent
1987-11-24
1989-11-28
Hoag, Willard
Plastic article or earthenware shaping or treating: apparatus
Reshaping, resizing or vulcanizing means for tire, tire...
Sectional female mold including locking or clamping assembly...
425DIG5, B29C 3304, B29C 3500
Patent
active
048834157
ABSTRACT:
The present invention relates to a vulcanizing mold for elastomeric or plastomeric to toroidal articles, comprising, a first cheek and a second cheek being axially opposed to each other, the first cheek and the second cheek delimit the flanks of an article to be molded; and, a crown of radially contractile and expansible sectors interposed between the first cheek and the second cheek which delimit a radially outer surface of the article to be molded, the sectors comprising two connected pieces wherein a first connected piece is a matrix that has a radially inner surface substantially corresponding to a portion of the crown surface of the article to be molded, and a second connecting piece which is a support for the matrix that has a radially outer surface inclined with respect to an axis of the mold, the support having means for solidly locking the matrix onto the support and the matrix being freely movable with respect to a corresponding support in at least the axial direction along the coupling surface between the first connecting piece and the second connecting piece; the support and a corresponding matrix therefor being operatively associated with one another through at least one fixing device that is alternatively shiftable between two operative positions, a first operative position being a working position wherein the matrix is solidly locked on the support, and a second operative position being a rest position wherein the matrix and the support are freely movable with respect to one another.
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Hoag Willard
Pirelli Coordinamento Pneumatici S.p.A.
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