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Process and apparatus for manufacturing tyres

A technology of tires and raw tires, applied in the field of tire manufacturing, can solve problems such as large thermal stress and mechanical stress, complex manufacturing, huge investment, etc., to achieve increased surface smoothness, high structure and dimensional accuracy, and eliminate the risk of irregular forces Effect

Inactive Publication Date: 2013-08-28
PIRELLI TYRE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the reinforcing bladder itself is complex to manufacture and is subject to a great deal of thermal and mechanical stress, making it necessary to replace said bladder after several vulcanization cycles
The applicant is also aware that the large number of inflatable toroidal supports required for the operation of a build shop under normal working conditions involves huge investments and high costs for installation management and service

Method used

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  • Process and apparatus for manufacturing tyres
  • Process and apparatus for manufacturing tyres
  • Process and apparatus for manufacturing tyres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0140] Referring to the accompanying drawings, an apparatus for manufacturing tires according to the invention is indicated generally at 1 .

[0141] Equipment 1 is designed to make tire 2 ( figure 2 ), which essentially comprises at least one carcass ply 3 internally coated with a layer of gas-tight elastomeric material or a so-called innerliner 4, the peripheral edge of the carcass ply close to an area commonly referred to as a "bead" 5 The joined two annular anchoring structures 5a, the belt structure 6 arranged circumferentially around the carcass ply 3, the tread blocks 7 circumferentially superimposed on the belt structure 6 and the carcass at laterally opposite positions Sidewalls 8 on the ply 3 , each said sidewall 8 extending from a respective bead 5 to a respective side edge of a tread block 7 .

[0142] Plant 1 basically comprises means for building said tire 2 and operating along a building line generally indicated at 9 , and means for vulcanizing the built tire ...

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PUM

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Abstract

A green tyre is either directly formed or, when building is over, engaged on an expandable toroidal support to be then introduced into a vulcanisation mould. The expandable toroidal support includes an expandable bladder and a pair of pressure rings, each including fast and second pressure sectors circumferentially distributed and operating at axially opposite positions on the expandable bladder. Driving devices act on the pressure rings to selectively translate them between a work condition at which the pressure sectors of each pressure ring, circumferentially aligned with each other, extend radially away from the geometric axis, and a rest condition at which the pressure sectors are disposed close to the geometric axis. Kinematic synchronisation members operatively associated with the driving devices mechanically mutually constrain the pressure rings, so as to impose a simultaneous and mutually symmetric movement on them.

Description

technical field [0001] The present invention relates to a method and apparatus for manufacturing tyres. Background technique [0002] Tires for wheels generally comprise a carcass structure comprising at least one carcass ply with respective opposite end straps engaged with respective annular anchoring structures, integrally into the area commonly referred to as the "bead". [0003] Associated with the carcass structure is a belt structure comprising one or more belt layers arranged in radially overlapping relationship with respect to each other and with respect to the carcass ply, and having a woven or metallic The reinforcing cords are cross-oriented and / or substantially parallel to the direction of circumferential extension of the tyre. Arranged onto the belt structure at a radially outer position are tread bands, also of elastomeric material like the other semifinished products constituting the tyre. [0004] Respective sidewalls of elastomeric material are also provi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D30/12B29D30/10B29D30/06
CPCB29D30/0645B29D30/12B29D30/0601B29D2030/105B29D2030/0647
Inventor M·马尔基尼F·马利亚尼P·G·皮安塔尼达
Owner PIRELLI TYRE SPA