Method and apparatus for molding a tire
US4333899A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1979 |
| Grant date | Jun 8, 1982 |
| Priority date | — |
| Expiry date | Dec 3, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/812
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tire is cast and cured in a stationary mold having an annular mold cavity, an inlet opening and an outlet vent. The mold is tilted for optimum foam flow and minimum air or bubble entrapment. A liquid reactive mixture is injected into the mold through the inlet opening and moves through the mold cavity in different directions providing two leading surfaces which meet to form an interface adjacent the outlet vent. The air, foam gases and interface portion are extruded from the mold cavity through a slot in the vent into a reservoir. After curing of the elastomeric material formed by the liquid reactive mixture in the mold, the material in the slot and reservoir may be severed from the tire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.