WO1992008603A1 - Procede de rechapage de pneus - Google Patents

Procede de rechapage de pneus Download PDF

Info

Publication number
WO1992008603A1
WO1992008603A1 PCT/US1991/008357 US9108357W WO9208603A1 WO 1992008603 A1 WO1992008603 A1 WO 1992008603A1 US 9108357 W US9108357 W US 9108357W WO 9208603 A1 WO9208603 A1 WO 9208603A1
Authority
WO
WIPO (PCT)
Prior art keywords
assembly
sub
layer
rubber
mandrel
Prior art date
Application number
PCT/US1991/008357
Other languages
English (en)
Inventor
Michael J. King
Original Assignee
Oliver Rubber Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oliver Rubber Company filed Critical Oliver Rubber Company
Publication of WO1992008603A1 publication Critical patent/WO1992008603A1/fr

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

Definitions

  • This invention relates to a method for rebuilding Q tires and more particularly for rebelting and retreading 2 steel-belted radial tires with belts that have become worn - ? or damaged.
  • 3 4 Background of the Invention 5 Radial tires have long utilized annular belts of g steel wire that are embedded in the tire casing under the 7 tread rubber to give the tire strength and durability. 8 Often, during the use of the tire, an upper steel belt 9 layer became damaged or corroded. Heretofore this o prevented the tire from being repaired or recapped and i resulted in its destruction. For larger radial tires used 2 °n trucks, the loss of expensive tires due to steel belt 3 damage presented a significant cost problem.
  • Fig. 1-5 illustrates a series of method steps
  • Fig. 5A is a view in section taken along the line
  • Fig. 6 is a view illustrating the preparation of 23 a tire casing by removal of tread rubber and old steel 24 - belting according to the method of the invention.
  • Fig. 7 is an exploded view in perspective showing
  • Fig. 8 is a view in perspective of a completed 30 rebuilt tire that has been provided with a rebelted tread
  • the present invention comprises a method for 2 simultaneously rebelting and retreading or recapping a 3 steel-belted radial tire that has been severely worn or 4 damaged.
  • Relatively large truck tires of the radial type 5 are particularly adaptable for such rebuilding or 6 rehabilitation because the tire casing is usually quite 7 substantial structurally and it is economically beneficial 8 to rebuild a tire rather than to destroy a worn or damaged 9 casing.
  • the method according to the 10 invention involves three major steps, namely (1) the 11 fabrication of a continuous, annular sub-assembly comprised 12 of new steel belting and tread rubber; (2) the preparation 13 of the worn or damaged tire casing; and (3) the 14 installation of the sub-assembly on the prepared tire 15 casing. 16
  • Figs. 1 and 2 show 17 a circular mandrel 10, preferably of aluminum, on which 18 will be built a sub-assembly 11 comprised of new steel 19 belting and pre-cured tread rubber.
  • the mandrel has an 20 outer cylindrical surface 12 that is slightly convex and 21 with a width that is somewhat greater than the tread width 22 of a standard tire.
  • the mandrel is mounted on an expandable 24 hub 14 of a conventional tire builder apparatus.
  • a small 25 amount of rubber cement 16 is first applied to the outer 26 surface of the mandrel to provide an initial tack for a 27 base layer of steel cord material 18 which is to be placed 28 29 on the mandrel.
  • the steel cord material 18 comprises a flat strip of cured rubber of 30 31 constant width and thickness with bias angled steel wires 32 20 embedded therein.
  • the thickness of the steel - 3 cord material 18 is around 0.050" and its width may vary
  • the subr 25 assembly 11 on the mandrel 10 is covered with a standard, 26 flexible curing envelope 34.
  • a standard, 26 flexible curing envelope 34 Such an envelope, which is 27 well known in the tire recapping field, is generally made 28 of sheet rubber material and has an annular shape with a U- 29 shaped cross-section that provides side wall portions 35.
  • An outlet valve 36 provided in the envelope is connected 31 through a pressure gauge 38 in a conduit 40 connected to a _ 2 vacuum pump (not shown) .
  • the sub-assembly on the mandrel - 3 completely covered by the envelope 34 is now removed from - . the tire building machine 10, and a pair of side plates 42 _ 5 are bolted onto the sides of the mandrel to seal the 36 envelope 34, as shown in Fig. 5A.
  • the entire assembly With the envelope 34 sealed on the sub-assembly 3 11 and mandrel 10, the entire assembly is placed in a 4 curing chamber. Using elevated pressure (e.g. 85 psi) and 5 temperature (e.g. °F) within the chamber, the bonding layer 6 28 is cured for a predetermined period (e.g. 2.5 - 3.0hrs) 7 to unify the sub-assembly as one integral ring comprising 8 the tread rubber 30 and inner steel belts 18 and 24. 9
  • elevated pressure e.g. 85 psi
  • 5 temperature e.g. °F
  • a used tire casing 44 to be rebelted is 11 prepared for receiving the sub-assembly 11.
  • the used tread rubber 48 is 13 removed.
  • a worn or damaged 14 steel belt 50 is removed using a knife or slitter tool 52 15 which is held in a jig and moved under the damaged belt as 16 the tire is rotated on a builder machine. 17
  • the present method provides for the 7 rebuilding and rehabilitation of a valuable but worn or 8 damaged tire carcass that might otherwise have become useless except for salvage value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)

Abstract

Procédé pour rechaper un pneu radial à ceinture acier afin de reconstituer la ceinture endommagée ainsi que la gomme de bande de roulement. Le procédé consiste à confectionner sur un mandrin (10) un sous-ensemble annulaire continu constitué d'une ou de plusieurs nappes de ceinture acier (18) revêtues de gomme, plus des bandes de gomme crue de liaison, et recouvert par une bande extérieure de gomme de bande de roulement pré-vulcanisée (30). Le sous-ensemble est vulcanisé sur le mandrin (10) à température et pression élevées pour former un ensemble monobloc. A la suite de la préparation d'une enveloppe de pneu par élimination de sa gomme de bande de roulement et de sa ceinture endommagée ou usée, une nappe de gomme de liaison crue est appliquée sur la face extérieure de la bande de roulement. Le sous-ensemble est ensuite posé sur l'enveloppe préparée et l'ensemble complet est vulcanisé dans une chambre à pression et température élevées.
PCT/US1991/008357 1990-11-20 1991-11-08 Procede de rechapage de pneus WO1992008603A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61605990A 1990-11-20 1990-11-20
US616,059 1990-11-20

Publications (1)

Publication Number Publication Date
WO1992008603A1 true WO1992008603A1 (fr) 1992-05-29

Family

ID=24467872

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/008357 WO1992008603A1 (fr) 1990-11-20 1991-11-08 Procede de rechapage de pneus

Country Status (2)

Country Link
AU (1) AU9075291A (fr)
WO (1) WO1992008603A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5311915A (en) * 1991-05-23 1994-05-17 Compagnie Generale Des Etablissements Michelin - Michelin & Cie Tire tread and tire having marking to facilitate removal of tread for recapping
EP0610712A1 (fr) * 1993-02-09 1994-08-17 The Goodyear Tire & Rubber Company Procédé d'application de bandes de roulement prévulcanisées à des carcasses de pneumatique utilisant un appareil de vulcanisation sans tissu perméable
EP2700496A4 (fr) * 2011-04-21 2015-12-30 Bridgestone Corp Procédé de fabrication de pneumatiques rechapés et pneumatique approprié pour ce procédé de fabrication
US9302439B2 (en) 2011-04-30 2016-04-05 Compagnie Generale Des Etablissements Michelin Methods and apparatus for joining treads
US9757916B2 (en) 2011-06-30 2017-09-12 Compagnie Generale Des Etablissements Michelin Methods and apparatus for installing a tread ring upon a tire carcass

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1399864A (en) * 1971-07-21 1975-07-02 Dunlop Ltd Manufacutre of pneumatic tyres
US4226655A (en) * 1979-01-02 1980-10-07 The B. F. Goodrich Company Method for building a tire
EP0189826A2 (fr) * 1985-01-31 1986-08-06 Bandag Licensing Corporation Procédé de rechapage des pneus comprenant l'enlèvement et le remplacement des bandes renforcées d'acier
US4971643A (en) * 1987-06-04 1990-11-20 Continental Aktiengesellschaft Method for retreading and partially replacing the belt of a pneumatic vehicle tire having a radial carcass tire body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1399864A (en) * 1971-07-21 1975-07-02 Dunlop Ltd Manufacutre of pneumatic tyres
US4226655A (en) * 1979-01-02 1980-10-07 The B. F. Goodrich Company Method for building a tire
EP0189826A2 (fr) * 1985-01-31 1986-08-06 Bandag Licensing Corporation Procédé de rechapage des pneus comprenant l'enlèvement et le remplacement des bandes renforcées d'acier
US4971643A (en) * 1987-06-04 1990-11-20 Continental Aktiengesellschaft Method for retreading and partially replacing the belt of a pneumatic vehicle tire having a radial carcass tire body

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5311915A (en) * 1991-05-23 1994-05-17 Compagnie Generale Des Etablissements Michelin - Michelin & Cie Tire tread and tire having marking to facilitate removal of tread for recapping
EP0610712A1 (fr) * 1993-02-09 1994-08-17 The Goodyear Tire & Rubber Company Procédé d'application de bandes de roulement prévulcanisées à des carcasses de pneumatique utilisant un appareil de vulcanisation sans tissu perméable
TR28585A (tr) * 1993-02-09 1996-11-01 Goodyear Tire & Rubber Fitilsiz bir vulkanize etme aygiti kullanilarak ön-vulkanizasyondan gecmis taban yüzlerinin ic lastik kusaklarina baglanmasi icin bir yöntem.
EP2700496A4 (fr) * 2011-04-21 2015-12-30 Bridgestone Corp Procédé de fabrication de pneumatiques rechapés et pneumatique approprié pour ce procédé de fabrication
US9327465B2 (en) 2011-04-21 2016-05-03 Bridgestone Corporation Retreaded tire manufacturing method and tires suited therefor
US9302439B2 (en) 2011-04-30 2016-04-05 Compagnie Generale Des Etablissements Michelin Methods and apparatus for joining treads
US9757916B2 (en) 2011-06-30 2017-09-12 Compagnie Generale Des Etablissements Michelin Methods and apparatus for installing a tread ring upon a tire carcass
US10843428B2 (en) 2011-06-30 2020-11-24 Compagnie Generale Des Etablissements Michelin Methods and apparatus for installing a tread ring upon a tire carcass

Also Published As

Publication number Publication date
AU9075291A (en) 1992-06-11

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