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Process for building tyres and tyre obtained thereof

A tire and carcass structure technology, which is applied to the reinforcement layer of pneumatic tires, tire parts, tires, etc., can solve the problems of insufficient work efficiency and inability to ensure positioning accuracy, and achieve the effect of great work flexibility

Inactive Publication Date: 2010-09-01
PIRELLI TYRE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The applicant has noticed that a liner insert as described in patent documents EP 0976585 and EP 1170151, for example made according to the construction method disclosed in patent documents US 3990931 and EP 0613757, will not ensure satisfactory positioning Accuracy, the positioning accuracy refers to the accuracy of positioning the insert relative to the axially outer edge of the belt structure, especially in the industry of manufacturing tires for high performance and ultra-high performance vehicles, this accuracy requirement is not Dispensable
Furthermore, the performance of these tires may not be sufficient compared to the required indicators due to the unavoidable joints between the different semi-finished products to be assembled

Method used

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  • Process for building tyres and tyre obtained thereof
  • Process for building tyres and tyre obtained thereof
  • Process for building tyres and tyre obtained thereof

Examples

Experimental program
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Effect test

Embodiment Construction

[0068] Referring to the accompanying drawings, an apparatus for manufacturing tires for vehicle wheels is generally designated with numeral 1 , which apparatus is intended to carry out the method according to the invention.

[0069] Equipment 1 is used to manufacture tires 2 (see Figure 5 with Figure 10 ), the tire essentially comprising a carcass structure 2a having at least one carcass ply 3 . Inside one or more carcass plies is attached an airtight layer of elastomeric material - the so-called tire liner. Engaged to the two corresponding end flaps 3a of the carcass ply 3 are two annular anchoring structures 5, each comprising a so-called "bead core" 5a connected to a filler 5b of elastomeric material. Said annular anchoring structure 5 is enclosed by two regions commonly referred to as "beads" 6, where the engagement of the tire 2 with the corresponding mounting rim is usually carried out.

[0070] A belt structure 7 comprising one or more belt layers 7a, 7b, 7c is att...

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PUM

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Abstract

In a process for building tyres, a carcass structure (2a) comprising at least one carcass ply (3) and a belt structure (7) are formed. Manufacture of the belt structure (7) comprises the steps of: forming a first portion (24) of at least one cushion insert (10) through spiralling of a continuous elongated element; forming at least one first belt layer (7a) in a radially external position to said first portion (24) in such a manner that said first portion (24) axially projects from one of the axially opposite side edges of the first belt layer (7a); forming a second portion (26) of the cushion insert (10) through spiralling of a continuous elongated element in a radially external position to the side edge of the first belt layer (7a) and to a stretch of the first portion (24) projecting from the side edge itself, so as to enclose the side edge between the first and second portions (24, 26) of the cushion insert (10).

Description

technical field [0001] The invention relates to a method for building tires and tires obtained by said method. Background technique [0002] Tires for vehicle wheels generally have a carcass structure comprising at least one carcass ply with opposing end flaps engaging corresponding annular anchoring structures, the annular anchoring structures Contained within the region commonly referred to as the "bead", the bead region constitutes the radially inner circumferential edge of the tyre. [0003] A belt structure comprising one or more belt layers is connected to the carcass structure, said belt layers being arranged radially overlying each other and onto the carcass ply, the belt layers having a fabric or metallic reinforcing threads, the orientation of which is intersecting and / or substantially parallel to the direction of circumferential extension of the tyre. A tread strip is attached to the belt structure at a radially outer position, this tread strip being made of ela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/16B29D30/24B29D30/30B60C9/18
CPCB29D30/1621B29D30/3021B29D30/242B29D30/3028B29D30/305B29D30/3057B29D30/70B60C9/1835Y10T152/10054Y10T152/10783
Inventor G·曼奇尼
Owner PIRELLI TYRE SPA