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US 2018/0009186 A1Published application
Process for manufacturing tyres for vehicle wheels
AssigneePirelli Tyre S.p.A.
InventorsMaurizio Marchini, Gianni Mancini
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AssigneePirelli Tyre S.p.A.
InventorsMaurizio Marchini, Gianni Mancini
Estimating the term…
In the building of a carcass structure for tyres of vehicle wheels, the step of reinforcing with a loop at least one annular anchoring structure (10) associated at the axially opposite end edges of a carcass ply is carried out. Said reinforcement step is carried out on at least one radially expandable/contractable service drum (107a, 107b) and comprises the steps of: setting the service drum (107a, 107b) to a predetermined radial dimension selected according to the fitting diameter of the tyre to be manufactured, depositing the loop (5) on the service drum (107a, 107b), loading the annular anchoring structure (10) onto the service drum (107a, 107b) in a radially outer position with respect to the loop (5), radially expanding the service drum (107a, 107b) up to lock in position the annular anchoring structure (10), rotating the service drum (107a, 107b) about a longitudinal axis (X-X) thereof and, during such a rotation, turning the loop (5) up about the annular anchoring structure (10).
Process for manufacturing tyres for vehicle wheels, comprising the step of building a carcass structure comprising at least one carcass ply associated, at axially opposite end edges thereof, with respective annular anchoring structures (10);
Process for reinforcing with a loop (5) an annular anchoring structure (10) of a tyre for vehicle wheels, comprising the steps of:
Process according to any one of the previous claims, wherein at least one of the aforementioned steps a) and b) is carried out at least in part simultaneously to at least part of at least one of the aforementioned steps c) to g).
Process according to any one of the previous claims, wherein the step of turning the loop (5) up is carried out at least in part simultaneously to at least part of at least one from step g) of unloading the reinforced annular anchoring structure (15) from the service drum (107a, 107b) and step c) of loading a new annular anchoring structure (10) onto the service drum (107a, 107b).
Process according to any one of the previous claims, wherein step c) of loading the annular anchoring structure (10) onto the service drum (107a, 107b) comprises the steps of:
Process according to any one of the previous claims, wherein step g) of unloading the reinforced annular anchoring structure (15) from the service drum (107a, 107b) comprises the steps of:
Process according to any one of the previous claims, wherein step a) of setting the service drum (107a, 107b) to a predetermined operative radial dimension, comprises a step of radially expanding the service drum (107a, 107b) until the annular outer surface (108) thereof reaches a predetermined diameter selected according to the fitting diameter of the tyre to be manufactured.
Process according to any one of the previous claims, comprising, between step b) of depositing the loop (5) onto an annular portion of an annular outer surface (108) of the service drum (107a, 107b) and step c) of loading the annular anchoring structure (10) onto the service drum (107a, 107b) in a radially outer position with respect to the loop (5), a step of moving the service drum (107a, 107b) from a first work station defined at a feeding device (140) of the loop (5) to a second work station defined at a device (130) for loading/unloading the annular anchoring structure (10) onto/from the service drum (107a, 107b).
Process according to any one of the previous claims, wherein the loop (5) is obtained by cutting to size a band-like reinforcement element (50) and step b) of depositing the loop (5) onto an annular portion of an annular outer surface (108) of the service drum (107a, 107b) comprises the steps of:
Process according to any one of the previous claims, wherein said annular portion of annular outer surface (108) of the service drum (107a, 107b) is in an offset axial position with respect to a transversal middle plane (C) of the service drum (107a, 107b).
Process according to any one of the previous claims, wherein step c) of loading the annular anchoring structure (10) onto the service drum (107a, 107b) comprises the step of positioning the annular anchoring structure (10) in a centred position with respect to a transversal middle plane (C) of the service drum (107a, 107b).
Process according to any one of the previous claims, wherein the step of turning the loop (5) up is carried out by moving in synchrony at least one pair of turning members (181, 182) with a combined motion along a first direction (A) parallel to the longitudinal axis (X-X) of the service drum (107a, 107b) and along a second direction (B) perpendicular to the longitudinal axis (X-X) of the service drum (107a, 107b), said turning members (181, 182) being arranged on opposite sides with respect to a transversal middle plane (C) of the service drum (107a, 107b).
Apparatus (100) for reinforcing with a loop (5) an annular anchoring structure (10) of a tyre for vehicle wheels, the apparatus comprising:
Dependencies are inferred from the claim text.