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Curing membrane for a tyre

A technology of vulcanizing bladders and bladders, which is applied in the field of tires to achieve the effect of increasing the surface area

Active Publication Date: 2020-10-02
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it does have better air-expelling capabilities than the capsules of the previous document, said document deals with a specific configuration of the green tire and thus with appropriate molding equipment, elastomeric components, etc.

Method used

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  • Curing membrane for a tyre
  • Curing membrane for a tyre
  • Curing membrane for a tyre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In the various figures, identical or similar elements have the same reference numerals. The description thereof will therefore not be repeated systematically.

[0028] figure 1 One half of a vulcanization mold 1 for a tire is schematically shown, showing the mold in a closed position, corresponding to the operation of vulcanizing a green green tire 2 . figure 1 The mold shown in is of the type with two molding parts 4 and 5 in contact with each other at the equatorial plane E of the green blank. In a known manner, the molded part consists of several rigid parts defining, in the closed position of the mould, a molding cavity 6 having a shape that rotates around a central axis XX', the molding cavity The inner walls of the body 6 are formed to define the outer surface of the tyre, after moulding. The molding parts 4 and 5 are driven and moved by actuators provided for this purpose, so as to close the molding cavity 6 before the vulcanization of the green blank begins a...

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PUM

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Abstract

A curing membrane (7) for a tyre comprises a flexible cross-linked rubber wall, the external surface of which is designed to come into contact with the internal surface of a tyre blank during curing,the external surface having a relief structure comprising a plurality of air vent channels. Said relief structure has first channels which form air vent grooves (100) arranged at a distance of 2 to 5mm and having a depth of 0.4 to 1 mm, two adjacent grooves defining, between them, an inter-groove region (500) which comprises second channels which form furrows (1000) for channeling air which are constructed so as to communicate with each other and with at least one of the grooves (100), the furrows each having a depth of 0.01 to 0.4 mm and being located at a distance of 0.2 to 1 mm from each other.

Description

technical field [0001] The present invention relates to the field of tyres, and to curing bladders used in the process of manufacturing tyres. Background technique [0002] Generally, a green green tire is molded and vulcanized in a vulcanization mold, thereby obtaining a tire. The outer wall of the green green body is pressed against the rigid inner wall of the vulcanization mold by a flexible curing bladder, which expands inside the green green body under the influence of a pressurized fluid. Thus, the tread pattern on the mold insert and casing is imprinted onto the green casing, which is vulcanized by heat. The curing bladder is unfolded inside the green tire shell before vulcanization and is folded at the end of vulcanization; the curing bladder must withstand mechanical stress, thermal stress and wear and must be able to be easily detached from the cured tire. [0003] The green green body of a tire is usually obtained by bending and successively laying up various el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/06
CPCB29D30/0654B29D2030/0655B29C33/10B29C33/42
Inventor F·皮亚洛A·福杰拉斯J·梅里诺洛佩兹
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN