Method for producing rubber and like molded articles

Abstract

Abstract An apparatus which includes a plurality of molds which open and close, means for closing the molds, for holding them closed under a first pressure or force, and for moving them into registry with a clamping station where a second, much greater force or pressure may be applied, while a charge of article-forming material is forced into the molds, one at a time, as they are brought into position, and means for maintaining the lower force on the molds after the material has been introduced into the molds, whereby only one high force cylinder assembly is needed for a plurality of molds, since each mold requires a high force to remain closed only during a short period within a molding and vulcanizing cycle. The process is particularly described with respect to a hydraulically operated machine in which molding is by way of injection of rubber into mold units mounted on a turntable so as to permit free but limited axial movement, to simplify operation of the clamping and high force-applying steps, and continuous operation.

Inventors

• 👤 L Bertrandi

Bibliographic Details