Process of manufacturing pneumatic tires and apparatus for carrying out the process
First Claim
1. A process of manufacturing pneumatic tires made of synthetic elastomers, particularly of polyurethane, and comprising an inner tire layer, a tire body, which is anchored in the inner tire layer by means of bead cores, a belt, and an outer tire layer provided with a tread portion, said process being characterized in that the tire body is made in that a cord or cable is wound radially from one bead core to the other bead core over the periphery of a forming core but spaced from the surface of said forming core while being anchored in alternation on at least one of the two bead cores provided on both sides of the tire by being completely slung around each bead core, that a peripherally extending belt is applied, and that finally the outer tire layer and the tread portion are applied.
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Accused Products
Abstract
The process for manufacturing pneumatic tires comprises as essential step the manufacture of a tire body by winding cords or cables (3, 23, 35). The cord or cable is withdrawn from a supply reel (7) under constant tension and laid around and anchored to the bead cores (2; 22; 36; 39) arranged at both sides of the tire. In addition a peripherally extending belt is applied which again can be formed by winding cords or cables, and the tire is completed by injection molding or die casting elastomeric material. An apparatus suitable for performing said process comprises in addition to an interior mold (1, 21, 38) two sets of outer molds, the first set allowing the shaping of an inner tire layer provided with protrusions serving as spacers for the winding of cables or cords and the second set corresponding to the external shape of the tire (FIG. 2).
43 Citations
13 Claims
- 1. A process of manufacturing pneumatic tires made of synthetic elastomers, particularly of polyurethane, and comprising an inner tire layer, a tire body, which is anchored in the inner tire layer by means of bead cores, a belt, and an outer tire layer provided with a tread portion, said process being characterized in that the tire body is made in that a cord or cable is wound radially from one bead core to the other bead core over the periphery of a forming core but spaced from the surface of said forming core while being anchored in alternation on at least one of the two bead cores provided on both sides of the tire by being completely slung around each bead core, that a peripherally extending belt is applied, and that finally the outer tire layer and the tread portion are applied.
Specification