Tire mold
US4063861A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1976 |
| Grant date | Dec 20, 1977 |
| Priority date | — |
| Expiry date | Mar 23, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/044
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A casting or injection mold for vehicle tires comprises two separable half-shells together defining an annular cavity into which a segmented core is introduced, radially inwardly converging core segments alternating with parallel-sided or radially inwardly diverging core segments to facilitate extraction of the core from the molded tire. In operation, one or more of the non-converging segments are immobilized within the mold, with the aid of mating formations on these segments and on the two half-shells, while the converging segments are urged radially inwardly by resilient or fluidic forces. In a specific embodiment these forces are supplied by a contractile annular spring with projections received in axially extending undercuts of all the segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.