Process and plant for producing tyres
AssigneePirelli Tyre S.p.A.
InventorsStefano TESTI, Alan BOTTOMLEY, Alessio LONGONI
Life of this patent
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Abstract
A compound plant for processing elastomeric compounds for tyres with both a high quality and a high throughput includes at least one batch mixing device in combination with at least one multi-shaft continuous mixing device having a high number of shafts. For example, the multi-shaft continuous mixing device could be a ring extruder having a plurality of co-rotating screws disposed to form a ring. In operation, a first elastomeric compound is discharged from the at least one batch mixing device and processed with the at least one multi-shaft continuous mixing device to obtain a second elastomeric compound.
Claims23
1-71. (canceled)
A plant for manufacturing a tyre, comprising:
- a compounding plant capable of being adapted to produce at least one crosslinkable elastomeric compound;
- at least one manufacturing machine capable of being adapted for preparing a green tyre using a plurality of structural elements;
- at least one device capable of being adapted for preparing at least one structural element of said plurality of structural elements, wherein said at least one structural element comprises said at least one crosslinkable elastomeric compound;
- and
- at least one vulcanization press capable of being adapted to moulding and crosslinking said green tyre to obtain a finished tyre,
- wherein the compounding plant comprises:
- a mixing apparatus comprising at least one batch mixing device, said mixing apparatus capable of being adapted to produce a first elastomeric compound;
- and
- at least one multi-shaft continuous mixing device, said multi-shaft continuous mixing device being a ring extruder and comprising an inner core, an outer housing defining with said inner core an annular chamber, and at least six rotating screws, wherein said ring extruder comprises at least one gas outlet opening provided in said outer housing, said multi-shaft continuous mixing device capable of being adapted to receive said first elastomeric compound and to produce a second elastomeric compound;
- and
- a vacuum device configured to apply a vacuum to said at least one gas outlet opening during mixing of said first elastomeric compound in said ring extruder.
Dependencies are inferred from the claim text.