Method and apparatus for manufacturing a tyre tread and a tyre
AssigneeBridgestone Europe NV/SA
InventorRoberto Mattocci
Life of this patent
Estimating the term…
Abstract
A method of manufacturing an agricultural tyre (1) with deep cross-lugs (6), comprising the steps of: (a) proving a tyre case (2) and tread belts (3); (b) applying rubber blocks (206) onto tread belts (3), each of such rubber blocks (206) being arranged to make a respective lug (6) of the final tread (4); (c) winding a rubber ribbon (200) above said rubber blocks (206) so as to completely enclose said rubber blocks (206); (d) curing the rubber blocks (206) together with the wound ribbon (200) in a curing mould (105) negatively reproducing a desired pattern of the tread (4).
Claims20
An apparatus for manufacturing a tire, the tire including a tread comprising a tread base and a number of lugs, each of which projects upwards from the tread base and extends substantially crosswise to a travelling direction of the tire, the apparatus comprising the following units arranged in an operative sequence:
- a rubber mixing and extruding unit configured to output an extruded or calandered ribbon for making the tread base and an extruded or calandered strip for making rubber blocks, each of the rubber blocks being configured to make a respective lug of the tread;
- a drum unit configured to allow a tread casing, tread belts and rubber blocks be arranged one upon the other;
- a ribbon tread applicator, configured to wind the extruded or calandered ribbon about the rubber blocks so as to shield the rubber blocks;
- and
- a curing unit of the rubber blocks and wound ribbon, which curing unit comprises a mould negatively reproducing a desired pattern of the tread.
An apparatus for manufacturing a tire, the apparatus comprising:
- an extruder configured to extrude a green rubber strip;
- a cutter configured to cut the green rubber strip into a plurality of green rubber blocks;
- a drum unit configured to receive tread belts and the green rubber blocks;
- a ribbon tread applicator, configured to wind a green rubber ribbon about the green rubber blocks;
- and
- a vulcanization mold configured to receive the tread belts, the green rubber blocks, and the green rubber ribbon.
An apparatus for manufacturing a tire, the apparatus comprising:
- calander configured to calander a green rubber strip;
- a cutter configured to cut the green rubber strip into a plurality of green rubber blocks;
- a drum unit configured to receive tread belts and the green rubber blocks;
- a ribbon tread applicator, configured to wind a green rubber ribbon about the green rubber blocks;
- and
- a vulcanization mold configured to receive the tread belts, the green rubber blocks, and the green rubber ribbon.
Dependencies are inferred from the claim text.