The Goodyear & Tire Rubber Company

Other

David Lowell Wolfe

Timothy Michael Rooney

Norbert Majerus

Robert Leon Benedict

William Allen Rex

Albert James Yovichin

Thomas Andrew Laurich

John S Rambacher

Alan Greenwood

Bernard Byron Jacobs

Douglas Edward Pryor

Larry E Chlebina

Mohammad Eghbal Sobhanie

Daniel Patrick Hentosz

Veronique Moris-Herbeuval

Werner Hillman

Ronda R Bayer-Thayer

Ronda Renee Thayer

Walter George Macesich

Paul T Hardy

A poppet valve assembly having a spring for holding the valve in a closed position and permitting opening of the valve in response to air pressure including valve stem alignment provided by a sleeve in engagement with the spring and having a cross pin supporting surface for engagement with the pin in shear to avoid bending.

Poppet valve with sleeve

Molds for injection molding tire components have controlled temperature passages leading to a manifold surrounding each mold cavity. The manifold is positioned to minimize weld lines in the injected tire component. In addition, a narrow gate opening between the manifold and mold cavity provides an elevated temperature of the injected material for decreasing the curing time of the tire component in the mold. Blade members may support and position tire components such as bead apex assemblies in the mold. These tire components may be unloaded by an unloader ring in communication with a source of vacuum for pulling the tire component out of the mold.

Injection molding of a tire component

Making a tire mold by spraying molten atomized metal on a model to form a metal shell and then reinforcing the shell with a resin backing to form a mold segment for the tire mold. Modular shoe container assemblies have replaceable backing members for making different size molds and flat plate spacers for providing different thicknesses of the mold segment. In one embodiment a slide block is used for one side of the cavity whereby a sole plate is eliminated.

Method and apparatus for making a tire mold

Growing community of inventors

Akron, OH, United States of America

David Lowell Wolfe