Method and apparatus for manufacturing rubber mixtures
US5415823A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Mar 24, 1994 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Mar 24, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B7/90
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing a rubber mixture includes the step of mixing at a first temperature in a batchwise operation a base mixture of rubber and non-reactive additives in a ram mixer. In a subsequent step the base mixture is removed from the ram mixer and formed to a strand. The strand is cooled to a temperature at which the strand is still warm. The warm strand is then fed to a ramless mixer and reactive additives are added. In a batchwise operation the base mixture and the reactive additives are mixed at a second temperature that is lower than the first temperature in order to form a finished rubber mixture. Preferably, cooling and feeding of the strand are performed simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.