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US 11,148,381 B2Granted
Methods for manufacturing a tread for agricultural tire using a dinitrile oxide cure system
AssigneeBridgestone Americas Tire Operations, LLC
InventorsRobert Barned, Joshua Abell, David Bender
Life of this patent
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Abstract
A method of manufacturing a tread for agricultural tires, the method comprising providing an agricultural tire casing, providing a cured rubber component having first and second planar surfaces, providing a plurality of cushion gums, wherein the plurality of cushion gums contains a cure system comprising a stable dinitrile oxide compound, providing a plurality of lugs, and forming an agricultural tread composite by mating the lugs to a planar surface of the cured rubber component using the cushion gum.
Claims12
A method of retreading a used agricultural tire, the method comprising:
- (i) providing a used agricultural tire casing from the used agricultural tire;
- (ii) providing a cured rubber component having first and second planar surfaces;
- (iii) providing a plurality of lug cushion gums by directly extruding a composition for forming the plurality of lug cushion gums onto the first surface of the cured rubber component, wherein each lug cushion gum of the plurality of lug cushion gums contains a cure system comprising a stable dinitrile oxide compound, and where each lug cushion gum of the plurality of lug cushion gums includes first and second surfaces;
- (iv) providing a plurality of lugs having a mating surface;
- (v) mating the lugs to the cured rubber component by mating the first surface of the plurality of lug cushion gums to the mating surface of the plurality of lugs, respectively, and mating the second surface of the plurality of lug cushion gums to the first surface of the cured rubber component;
- (vi) providing a casing cushion gum for mating the cured rubber component to the tire casing, wherein the casing cushion gum contains a cure system comprising a stable dinitrile oxide compound, and wherein the casing cushion gum including first and second surfaces;
- (vii) mating the cured rubber component to the used agricultural tire casing by mating the first surface of the casing cushion gum to the tire casing and mating the second surface of the casing cushion gum to the second surface of the cured rubber component to thereby form a pre-cured re-treaded agricultural tire;
- (viii) encasing the pre-cured re-treaded agricultural tire in an envelope;
- (ix) placing the enveloped pre-cured re-treaded agricultural tire in a pressure chamber;
- and
- (x) applying pressure to the enveloped pre-cured re-treaded agricultural tire and allowing the plurality of lug cushion gums and the casing cushion gum to cure and thereby form a re-treaded agricultural tire.
8 more elements
Dependencies are inferred from the claim text.