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Building drum for building tires for vehicle wheels and method for controlling the geometry of the building drum

A technology for forming drums and wheels, applied in tires, applications, household appliances, etc., can solve problems such as low diameter difference

Active Publication Date: 2022-06-03
PIRELLI TYRE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0031] However, the Applicant has observed that building drums of the type described in EP 2572872 A1 are intended to build tires for two-wheeled vehicles with a fitting diameter between 16 inches and 17 inches, and that tires of this type have The diameter difference between the fit diameter and the rolling diameter is very low, at least not comparable to the applicant's needs

Method used

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  • Building drum for building tires for vehicle wheels and method for controlling the geometry of the building drum
  • Building drum for building tires for vehicle wheels and method for controlling the geometry of the building drum
  • Building drum for building tires for vehicle wheels and method for controlling the geometry of the building drum

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Embodiment Construction

[0113] exist Figure 1-13 , the reference numeral 1 as a whole designates a building drum for tires for vehicle wheels according to the present invention.

[0114] The drum 1 comprises a central shaft 2 having an axial extension that intersects the geometrical axis X around which the drum 1 rotates.

[0115] In a radially outer position relative to the central axis 2 there are provided a plurality of first segments 3 which are movable away from and towards the central axis 2 in the radial direction.

[0116] Each first segment 3 includes a first radially outer surface 4 and a first radially inner surface 5 opposite the first radially outer surface 4 .

[0117] Each first sector comprises a first central portion 6 delimited by a first end portion 7 opposite in the circumferential direction and by a first axially outer edge 8 opposite each other.

[0118] The first central part 6 has a substantially cylindrical sector-shaped extension, in other words a curved extension with a ...

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Abstract

A building drum for building tires for vehicle wheels, comprising: a central shaft; a first segment movable radially between a contracted state and an expanded state; a second segment capable of moving between a contracted state and an expanded state Radial movement between; a radial movement device, which acts between the central axis and the first sector, so that the first sector moves between the contracted state and the expanded state. A kinematic mechanism acts between and kinematically connects the first segment and the second segment for radial movement of the first segment between a contracted state and an expanded state The second segment is caused to move radially between the contracted state and the expanded state, and vice versa. When the first segment and the second segment are in their respective expanded states, the first segment and the second segment are circumferentially aligned to define a substantially continuous annular surface, and when the first segment and the second segment are in the In the respective contracted states, the second sector is located radially inside relative to the first sector.

Description

technical field [0001] The present invention relates to a building drum for tires for vehicle wheels and a method for controlling the geometry of the building drum in a process for building tires for vehicle wheels. [0002] More particularly, the present invention relates to a building drum for use in building green tires that are subsequently subjected to a building and vulcanization cycle to obtain a final product, and a method of moving such a building drum. Background technique [0003] Tyres for vehicle wheels generally comprise a carcass structure comprising at least one carcass ply formed from reinforcing cords incorporated in a matrix of elastomeric material. The carcass plies have end edges respectively engaged with the annular anchoring structures. Said annular anchoring structure is arranged in the area of ​​the tire usually designated by the "bead" and is usually formed by a substantially circumferential annular insert on which at least one filling insert is ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D30/24
CPCB29D30/242B29D30/246
Inventor G·曼奇尼C·德科尔
Owner PIRELLI TYRE SPA