US 2003/0209309 A1 · Tire core package for use in manufacturing a tire with belts, plies and beads and process of tire manufacture

Abstract

A system for manufacturing an elastomeric tire utilizing a separate formation of a package having a tire core shape and containing tire belts, plies and beads. The package is formed by a laying up of layers of pre-cure elastomer intradigitated with sections of porous fabric, where the fabric fibers are placed at desired crossing angles to one another, and the pre-cure elastomer layers are positioned therebetween as a sandwich, with the sandwich then cold rolled into the tire core shape. Inelastic hoop shaped beads are fitted to and encapsulated in the tire core side walls ends and, as required, an inelastic belt is fitted around the tire core tread area that is secured thereto as by cold rolling a layer of pre-cure elastomer thereover, completing the tire core package. The tire core package is fitted into a mold, preferably a spin casting mold, and is supported therein equidistant from the mold cavity walls to receive an elastomer sprayed therein as the mold is spun. During spinning, the exothermic heat of reaction of the sprayed elastomer constituents as is generated as they are mixed and sprayed into the mold, completes the cure of the pre-cure elastomer, providing a homogenous finished tire with the belts, plies and beads optimally positioned therein.

Claims21

Dependent claims

A tire core package for fitting in a mold to receive an elastomeric material flow therearound, encapsulating the tire core package in the elastomeric material in the formation of a tire comprising, laying up layers of fabric whose fibers are positioned at desired crossing angles to one another, between layers of a material that will bind to said layers of fabric and form a sandwich that will hold a shape;

forming the sandwich into a tire core shape as a package;
and securing inelastic hoop beads to the ends of sides of the tire core package.

A system for encapsulating a package of belts, plies and beads, within an elastomeric tire as a tire core, in a tire casting process comprising, forming a pre-cure elastomer into thin flat sections;

intradigitating layers of said pre-cure elastomer sections with sections of fabric material having that are laid up at desired crossing angles to each other, forming a sandwich of alternating layers of pre-cure elastomer and sections of fabric;
cold rolling said sandwich into a tire core shape with ends of said sandwich rolled together with parallel edges of said tire core shape closed around encapsulating inelastic beads, completing a tire core package;
and fitting and supporting said core package in a mold with said tire core package side walls are equidistant from opposing walls of said mold.

Dependencies are inferred from the claim text.

Tire core package for use in manufacturing a tire with belts, plies and beads and process of tire manufacture

Life of this patent

Tire core package for use in manufacturing a tire with belts, plies and beads and process of tire manufacture

Life of this patent

Abstract

Claims21