Method and apparatus for manufacturing rubber mixtures
AssigneesJulius Peter, Continental Aktiengesellschaft
InventorJulius Peter
Life of this patent
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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.
Claims11
A method of manufacturing a rubber mixture, said method comprising the steps of:
- mixing at a first temperature in a batchwise operation a base mixture of rubber and non-reactive additives in a ram mixer;
- removing the base mixture from the ram mixer;
- forming the base mixture to a strand;
- cooling the strand to a temperature at which the strand is still warm;
- feeding the warm strand to a ramless mixer;
- adding reactive additives to the base mixture in the ramless mixer;
- and
- finishing in a batchwise operation mixing of the base mixture and the reactive additives at a second temperature lower than the first temperature to form a finished rubber mixture;
- wherein in said step of cooling the strand is cooled to a temperature range of between 50.degree. C. to 100.degree. C.
A device for manufacturing a rubber mixture, said device comprising:
- a ram mixer for mixing at a first temperature in a batchwise operation a base mixture of rubber and non-reactive additives;
- means for supplying the non-reactive additives to said ram mixer;
- means for supplying rubber to said ram mixer;
- a ramless mixer for finishing in a batchwise operation mixing of the base mixture and reactive additives at a second temperature lower than the first temperature to form a finished rubber mixture, said ramless mixer having a feed mouth;
- means for adding reactive additives to the base mixture in said ramless mixer;
- means for forming the base mixture coming from said ram mixer to a strand of a flat rectangular cross-section;
- a conveyor belt, positioned between said means for forming and said ramless mixer, for conveying the base mixture from said means for forming to said ramless mixer;
- and
- means for cooling the strand during conveying to a temperature range of between 50.degree. C. to 100.degree. C.
Dependencies are inferred from the claim text.