Method of and apparatus and plant for manufacturing a tyre for a vehicle wheel
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Abstract
A method of manufacturing a tyre for a vehicle wheel includes inflating a bladder of a building support so that a shape of an outer surface of the bladder correlates with a shape of an inner surface of the tyre, applying elementary components onto the building support, introducing the tyre and building support into a vulcanization mould, and curing the tyre. The bladder includes circumferential edges coaxially spaced apart from each other. During curing, the bladder is over-inflated so that the circumferential edges are radially farther from a geometric axis of the bladder than when the bladder is not over-inflated. An apparatus for building a tyre for a vehicle wheel includes the building support and inflating devices associated with the bladder. The building support includes axially opposite anchoring flanges that engage the circumferential edges. Radially sliding members associated with the anchoring flanges allow a radial movement of the circumferential edges.
13 Citations
57 Claims
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1-28. -28. (canceled)
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29. A method of manufacturing a tyre for a vehicle wheel, comprising:
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inflating a bladder of a building support so that a shape of an outer surface of the bladder correlates with a shape of an inner surface of the tyre;
applying a plurality of elementary components onto the building support in order to build the tyre;
introducing the tyre and the building support into a vulcanization mould; and
curing the tyre;
wherein the bladder comprises circumferential edges coaxially spaced apart from each other, and wherein during curing the tyre, the bladder is over-inflated so that the circumferential edges of the bladder are radially farther from a geometric axis of the bladder than when the bladder is not over-inflated. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. An apparatus for building a tyre for a vehicle wheel, comprising:
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a building support; and
inflating devices;
wherein the building support comprises;
a bladder; and
axially opposite anchoring flanges;
wherein the bladder comprises circumferential edges coaxially spaced apart from each other, wherein the anchoring flanges engage the circumferential edges of the bladder, wherein radially sliding members associated with the anchoring flanges allow radial movement of the circumferential edges of the bladder, wherein the inflating devices are associated with the bladder, wherein the inflating devices allow inflation of the bladder so that a shape of an outer surface of the bladder correlates with a shape of an inner surface of the tyre, and wherein the tyre is built with a plurality of elementary components. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. A plant for manufacturing a tyre for a vehicle wheel, comprising:
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a building apparatus;
inflating devices;
devices for applying a plurality of elementary components of the tyre onto a building support;
at least one mould for curing the tyre; and
devices for transferring the building support into the at least one mould;
wherein the building apparatus comprises the building support, wherein the building support comprises a bladder, wherein the bladder comprises circumferential edges coaxially spaced apart from each other, wherein the inflating devices are associated with the bladder, wherein the inflating devices allow inflation of the bladder so that a shape of an outer surface of the bladder correlates with a shape of an inner surface of the tyre, and wherein the circumferential edges of the bladder are radially movable in order to allow additional radial expansion of the bladder from an inflated condition.
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Specification