EP3086936A1 - Procédé de rechapage d'une enveloppe de pneumatique par dépression - Google Patents
Procédé de rechapage d'une enveloppe de pneumatique par dépressionInfo
- Publication number
- EP3086936A1 EP3086936A1 EP14828247.8A EP14828247A EP3086936A1 EP 3086936 A1 EP3086936 A1 EP 3086936A1 EP 14828247 A EP14828247 A EP 14828247A EP 3086936 A1 EP3086936 A1 EP 3086936A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carcass
- tread
- retreading
- internal volume
- depression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
- B29D30/54—Retreading
- B29D30/56—Retreading with prevulcanised tread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
- B29D2030/523—Ring-shaped treads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
- B29K2021/003—Thermoplastic elastomers
Definitions
- the invention relates to the retreading of tire tires.
- the retreading operation conventionally consists in eliminating the worn tread of a tire casing and replacing it with a new tread.
- a bonding layer of hot melt material binding the tread to the carcass.
- the softening binder is heated, which makes it easy to remove the tread.
- a tread that is compatible with use on a wheel is then laid.
- This layer is then heated to a predetermined temperature characteristic of the material so as to soften it and then allowed to cool. By cooling, the layer ensures the adhesion of the band to the carcass.
- the purpose of the invention is to improve the laying of the tread.
- a closed ring vulcanized tread is provided, and
- the tread is placed on the carcass
- the carcass and / or the tread carrying a thermofusible or thermoplastic bonding layer.
- the depression is carried out by lowering a pressure in the internal volume of at least 0.5 ⁇ 10 5 Pa, and preferably at least 0.8 ⁇ 10 5 Pa.
- lobes are generated on the carcass.
- Such lobes can significantly reduce the radius of the carcass and further facilitate the installation of the tread.
- a pressure is applied in at least one point of an outer face of the carcass.
- the pressure is applied by means of an organ and the organ is removed before the laying step.
- the formation of the lobes can occur naturally when the internal volume of the carcass is depressurized without external action. In other cases, it is necessary for this to apply an external pressure at one or more points of the carcass.
- the tread has a longitudinal rigidity greater than 1 Gpa.
- the tread thus has a role of mechanical hooping during rolling.
- the binding layer is heated.
- the bonding layer is in the pasty state at the time of laying.
- the tie layer comprises a thermoplastic elastomer.
- the latter is inflated.
- the carcass then resumes its original shape and is pressed against the tread.
- the bonding layer is then firmly pressed and pressurized between these two parts. By cooling to a temperature below its melting temperature, it creates the adhesion of the tread to the carcass.
- the tire casing is then ready to be mounted on a wheel.
- FIG. 1 is a radial sectional view of a tire casing which is the subject of a method according to one embodiment of the invention
- FIGS. 2 and 3 are respectively views in radial and longitudinal section of the positioning the tread with respect to the carcass while the latter is under a vacuum;
- FIG. 4 is an axial sectional view of the casing of Figure 1 and a vacuum device.
- a tire casing comprising a carcass and a tread. When it is used, it must be removed before installing a new tread.
- the envelope is provided with a bonding layer comprising a thermofusible or thermoplastic material, the layer is heated until its softening, which loses its adhesiveness. The band can then be gripped and completely separated from the rest of the casing by peeling.
- the bare carcass is then subject to the retreading process.
- the carcass 4 of the tire envelope 2 is mounted on a rim 16.
- An outer surface of the carcass then follows a circular ring contour 20.
- lobes 12 may form naturally on the carcass. The number of lobes thus formed varies according to the geometric parameters of the carcass and its composition. However, if they do not appear naturally, manually apply pressure locally at least one point of the carcass to force their formation. The presence of five lobes can be observed in FIG. 1.
- a carcass ply provided with reinforcements at 90 ° in textile in particular nylon, rayon, polyester or polyethylene terephthalate (PET),
- a closed ring vulcanized tread 6 is then provided with a tie layer 10 on an inner face and which may have a radius slightly less than that of the carcass.
- a tie layer 10 is a layer made of a hot melt material known in itself.
- thermofusible material there is understood a material capable of softening when heated to bring it to a predetermined temperature characteristic of the material, said softening temperature.
- a material may be selected from thermoplastic elastomers such as SBS (styrene-butadiene-styrene) or SIS (styrene-isoprene-styrene).
- SBS styrene-butadiene-styrene
- SIS styrene-isoprene-styrene
- hot melt material capable of softening at a temperature of between 140 ° C and 200 ° C.
- This bonding layer is heated to a sufficient temperature so that it is in a pasty state.
- the heating may for example be by infrared radiation.
- the tread is then laid on the carcass by grasping it by its external face. It is understood that the vacuum of the carcass and the lobes formed considerably reduce the size of the carcass, as indicated by the contours 20 and 22, and therefore that there is no need to stretch the tread too much, which can thus include reinforcements having a rigidity greater than 70 MPa.
- the tread Following the positioning of the tread on the carcass, it inflates the latter to achieve the assembly of the envelope.
- the layer of the link still in the pasty state, is then firmly pressed and pressed between the carcass and the tread. It is then allowed to cool to a temperature below its melting temperature, which creates the adhesion of the assembly.
- the envelope is then removed from the rim.
- the envelope can then be mounted on a wheel.
- the tie layer may comprise a hot melt material other than a thermoplastic elastomer.
- the carcass may be provided with a heat-fusible tie layer, instead of or in addition to that worn on the tread.
- the carcass may have a different architecture and other dimensions.
- Another number of lobes can be formed on the carcass when it is placed under vacuum.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
- Tires In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1363450A FR3015354B1 (fr) | 2013-12-23 | 2013-12-23 | Procede de rechapage d'une enveloppe de pneumatique par depression |
PCT/FR2014/053416 WO2015097375A1 (fr) | 2013-12-23 | 2014-12-18 | Procédé de rechapage d'une enveloppe de pneumatique par dépression |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3086936A1 true EP3086936A1 (fr) | 2016-11-02 |
Family
ID=50179834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14828247.8A Withdrawn EP3086936A1 (fr) | 2013-12-23 | 2014-12-18 | Procédé de rechapage d'une enveloppe de pneumatique par dépression |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160318273A1 (fr) |
EP (1) | EP3086936A1 (fr) |
FR (1) | FR3015354B1 (fr) |
WO (1) | WO2015097375A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3601986A4 (fr) | 2017-03-22 | 2021-01-06 | Bridgestone Bandag, LLC | Procédé et système de test de fuite d'enceintes |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1707014A (en) * | 1923-08-17 | 1929-03-26 | Hopkinson Ernest | Tire and process of making same |
US2957677A (en) * | 1959-02-24 | 1960-10-25 | Super Mold Corp | Method of and apparatus for reducing the diameter of a tire |
US3315319A (en) * | 1965-05-07 | 1967-04-25 | Hawkinson Paul E Co | Tire retreading mold |
US3614969A (en) * | 1969-03-07 | 1971-10-26 | Carl M Breiner | Tire recapping rim |
US3970493A (en) * | 1972-11-24 | 1976-07-20 | Caterpillar Tractor Co. | Belt replacement method for tube tires |
US20050016663A1 (en) * | 2003-07-23 | 2005-01-27 | Lockridge James Francis | Method of changing very large tires |
JP5680266B2 (ja) * | 2008-05-16 | 2015-03-04 | 横浜ゴム株式会社 | 空気入りタイヤおよび更生タイヤの製造方法 |
FR2988644B1 (fr) * | 2012-04-02 | 2014-04-11 | Michelin & Cie | Procede de rechapage d'un pneumatique dont la zone sommet est pourvue d'une sous-couche comportant un elastomere thermoplastique |
-
2013
- 2013-12-23 FR FR1363450A patent/FR3015354B1/fr not_active Expired - Fee Related
-
2014
- 2014-12-18 US US15/107,754 patent/US20160318273A1/en not_active Abandoned
- 2014-12-18 EP EP14828247.8A patent/EP3086936A1/fr not_active Withdrawn
- 2014-12-18 WO PCT/FR2014/053416 patent/WO2015097375A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2015097375A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR3015354B1 (fr) | 2016-08-05 |
FR3015354A1 (fr) | 2015-06-26 |
US20160318273A1 (en) | 2016-11-03 |
WO2015097375A1 (fr) | 2015-07-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3452308B1 (fr) | Adaptateur pour ensemble roulant et ensemble roulant le comprenant | |
EP0956212B1 (fr) | Dispositif de roulage a plat pour vehicule automobile et son procede de montage | |
WO2015097375A1 (fr) | Procédé de rechapage d'une enveloppe de pneumatique par dépression | |
EP2748021B1 (fr) | Kit et procede pour la fixation temporaire d'un dispositif electronique sur un support d'une enveloppe pneumatique | |
FR2654989A1 (fr) | Dispositif d'anneau pour roulage a plat. | |
EP3237236A1 (fr) | Procede pour l'assemblage d'une ebauche de pneumatique | |
EP2536874A2 (fr) | Procede d'exploitation d'une machine de tressage de fibres renforcantes | |
EP1719642B1 (fr) | Pneumatique et procédé de fabrication | |
EP3233456B1 (fr) | Moule et procédé pour la vulcanisation d'un adaptateur annulaire de pneumatique sur une jante | |
JP5495698B2 (ja) | プレキュアトレッド、更生タイヤ及び更生タイヤの製造方法 | |
EP1798022A1 (fr) | Membrane de retournement zone basse | |
EP3554817B1 (fr) | Dispositif et methode de prehension de transfert et de depose d'une bande de roulement sur le sommet d'une enveloppe de pneumatique | |
FR2999974A1 (fr) | Systeme et procede d'application d'un kit de reparation sur une structure endommagee permettant l'application d'une contre-pression optimale | |
EP4007694B1 (fr) | Tambour expansible pour la conformation de bandages pneumatiques comprenant un dispositif extenseur a parallélogramme pour le maintien de la tringle | |
WO1995000322A1 (fr) | Procede de fabrication d'un pneumatique a armature de carcasse, formee d'au moins une nappe de fils ou cables | |
FR2467714A1 (fr) | Ensemble d'un seul bloc a roue et bandage pneumatique | |
EP2931510B1 (fr) | Procédé de rechapage d'une enveloppe de pneumatique de véhicule | |
EP3086935B1 (fr) | Procédé de rechapage d'une enveloppe de pneumatique au moyen d'un rouleau | |
EP3086931B1 (fr) | Procédés de fabrication et de rechapage d'une enveloppe de pneumatique et enveloppes de pneumatique. | |
FR2464835A1 (fr) | Dispositif antiderapant adaptable sur une roue a pneumatique de vehicule | |
FR2917007A1 (fr) | Procede et dispositif pour la fabrication d'une ebauche de pneumatique. | |
FR2727900A1 (fr) | Garniture de protection du bord d'une jante d'une roue de vehicule lors du demontage d'un pneumatique au moyen d'une machine | |
FR2961155A1 (fr) | Volant a cordon integre pour la desolidarisation de sa garniture | |
BE373135A (fr) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20160531 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN Owner name: MICHELIN RECHERCHE ET TECHNIQUE S.A. |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20180703 |