Composite mold for making rubber covered rolls and method for ma

Details Composite mold for making rubber covered rolls and method for ma Composite mold for making rubber covered rolls and method for ma

1979-09-17

1981-09-08

Czaja, Donald E.

Static molds

Container-type molding device

Of named component

249114R, 249127, 264127, 264225, 264262, B28B 734

Patent

active

042880580

ABSTRACT:
A composite cylindrical mold for making rubber covered rolls comprises an outer rigid tube and an inner hollow cylindrical sleeve, with the space between the tube and the sleeve being filled with a cured elastomer. In preparing the mold, a heat shrinkable polytetrafluoroethylene tube etched on the outer surface is disposed around a rigid mandrel and heat shrunk thereon. The mandrel and sleeve are then inserted into the rigid tube in concentric relation. Curable rubber is then injected under pressure between the tube and the sleeve and the rubber is cured, causing the inner surface of the sleeve to conform exactly to the surface of the mandrel. The mandrel is then removed, and the inner surface of the sleeve is used as a molding surface for rubber covered rolls.

REFERENCES:
patent: 2724864 (1955-11-01), Krotz
patent: 3325434 (1967-06-01), Tully
patent: 3355772 (1967-12-01), Kolberg
patent: 3619446 (1971-11-01), Nauta
patent: 4098631 (1978-07-01), Stryjewski
patent: 4113825 (1978-09-01), Hill et al.

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