WO2000012297A1 - Procede et dispositif de fabrication de pneu - Google Patents

Procede et dispositif de fabrication de pneu Download PDF

Info

Publication number
WO2000012297A1
WO2000012297A1 PCT/US1998/018063 US9818063W WO0012297A1 WO 2000012297 A1 WO2000012297 A1 WO 2000012297A1 US 9818063 W US9818063 W US 9818063W WO 0012297 A1 WO0012297 A1 WO 0012297A1
Authority
WO
WIPO (PCT)
Prior art keywords
inboard
outboard
tire
edge
bladder
Prior art date
Application number
PCT/US1998/018063
Other languages
English (en)
Inventor
William Allen Rex
Original Assignee
The Goodyear Tire & 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 The Goodyear Tire & Rubber Company filed Critical The Goodyear Tire & Rubber Company
Priority to AU89249/98A priority Critical patent/AU8924998A/en
Priority to PCT/US1998/018063 priority patent/WO2000012297A1/fr
Priority to US09/786,244 priority patent/US6585022B1/en
Priority to TW088112880A priority patent/TW442383B/zh
Priority to ZA9905324A priority patent/ZA995324B/xx
Publication of WO2000012297A1 publication Critical patent/WO2000012297A1/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)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
    • 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)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/24—Drums
    • B29D30/244—Drums for manufacturing substantially cylindrical tyre components with cores or beads, e.g. carcasses
    • B29D30/246—Drums for the multiple stage building process, i.e. the building-up of the cylindrical carcass is realised on one drum and the toroidal expansion is realised after transferring on another drum
    • B29D30/247—Arrangements for the first stage only, e.g. means for radially expanding the drum to lock the beads
    • 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)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
    • B29D2030/3214—Locking the beads on the drum; details of the drum in the bead locking areas, e.g. drum shoulders
    • 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)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
    • B29D2030/3221—Folding over means, e.g. bladders or rigid arms
    • B29D2030/3228—Folding over means, e.g. bladders or rigid arms using one bladder acting on each side of the drum

Definitions

  • This invention relates to a method and apparatus for building and shaping a tire with preshaped components positioned in the tire at the same spacing as in the cured tire so that the other components will substantially conform to the shape of the preshaped components in the shaped tire. Also by substantially preshaping the tire to the cured shape the edges of the plies are turned up around the bead and set in predetermined turned up positions that will not be in appreciably hanged the tire press.
  • Tire shaping drums such as the drum shown in U.S. Patent No. 5,405,484 have been utilized for shaping tire components, however, no provision has been made for shaping the uncured components to the cured tire shape.
  • One of the reasons for not fully shaping the tire has been the limited force available for pushing the beads toward the cured tire positions.
  • the bladder hinge points are not secured to prevent pulling the plies under the tire bead.
  • a new and improved shaping drum and method of building a tire with preshaped components is provided.
  • the shaping drum has segmented pocket assemblies for gripping preshaped bead apexes and moving them to the spacing of the cured tire during shaping of the tire into a belt-tread assembly.
  • the tread may also be precured so that when the tire is cured, the only time required for vulcanization in the tire press is the curing time required for the remaining uncured components.
  • a method of building a tire with a shaping drum having an expandable inboard pocket assembly, an expandable outboard pocket assembly, an inflatable inboard turnup bladder, an inflatable outboard turnup bladder, an inboard sealing flap and an outboard sealing flap connected to said outboard pocket assembly and said inboard pocket assembly comprising: a. transferring a tire band to a position over the drum, b. positioning an outboard tire bead over the outboard pocket assembly and an inboard tire bead over the inboard pocket assembly, c. expanding the outboard pocket assembly and the inboard pocket assembly into sealing engagement with the inboard tire bead and the outboard tire bead, d. transferring a tread belt assembly to a position over the tire band, e.
  • inflating the inboard turnup bladder, the outboard turnup bladder and the tire band to expand the tire band into the tread belt assembly characterized by: f. simultaneously moving the inboard pocket assembly and the outboard pocket assembly toward a center line of a drum to positions spaced apart a distance which is substantially the same as the distance between the beads of the tire in the cured condition, g. applying a preshaped component of the tire to the tire band in the cured shape of the tire, h. stitching the tire tread belt assembly to the expanded tire band with a roller, i . deflating the inboard turnup bladder, the outboard turnup bladder and the tire band, j. retracting the inboard pocket assembly and the outboard pocket assembly; and k. removing the tire from the drum
  • a tire shaping drum comprising a shaft rotatably mounted on a support member at an inboard end of the shaft, an outboard drum section and an inboard section slidably mounted on the shaft at spaced apart positions, screw means mounted in the shaft and operatively connected to the inboard drum section and the outboard section for moving the inboard drum section and the outboard dram section together and apart upon rotation of the screw, each inboard drum section and outboard drum section having a cylindrical frame, a plurality of bead pocket segments mounted on each frame and spaced circumferentially around the shaft, radially extending spoke members attached to each of the bead pocket segments and slidably mounted in radially extending slots in the frame, piston cylinder assemblies mounted on the drum sections having pistons connected to sliding cams engagable with the spoke members to radially expand the pocket segments for retaining a shaping bladder and providing a bead seat characterized by each of the segments having a circumferentially extending channel for mounting
  • a pocket assembly for a tire building drum of the type having a plurality of circumferentially spaced expandable segments for retaining a shaping bladder and providing a bead seat characterized by each of the segments having a circumferentially extending channel for mounting a first edge and a second edge of the bladder, a flange on a first side of the channel, and a removable nose piece on a second side of the channel for removal during mounting of the first edge and the second edge of the bladder in the channel with a minimum stretching of the first edge and the second edge of the bladder.
  • Fig. 1 is a cross section of the shaping drum embodying the invention showing the tire band on the drum and the bead apexes in position for seating in the pockets.
  • Fig. 2 is a view like Fig. 1 of one half of the shaping drum in the expanded condition with the tread belt applied, the sidewall turned up and the bead pocket assembly moved to a position where the distance between the beads is the same as the bead spacing in the cured tire. The position of the ply edges after shaping is also shown in detail.
  • Fig. 3 is a schematic sectional view taken along line 3-3 in Fig. 1 showing the expanded positions of the pocket segments with parts being broken away at the outside edge of the pocket segments.
  • Fig. 4 is a schematic view taken along line 4-4 in Fig. 2 showing the expanded position of the pocket segments with parts being broken away.
  • Fig. 5 is a detailed fragmentary view in perspective of a pocket segment showing the cam for expanding the pocket segment.
  • a tire shaping drum 10 is shown in the retracted condition having a drum shaft 12 with a mounting flange 14 for attachment to a rotatable drum support assembly in a supporting housing (not shown).
  • Slidably mounted on the drum shaft 12 are an outboard drum section 16 and an inboard drum section 18.
  • Radially outward of the inboard drum section 18 is a cylindrical support assembly 20, slidably mounted on the dram section 18.
  • Radially outward of the outboard dram section 16 and inboard dram section 18 are cylindrical support assemblies 20 and 22 mounted on the dram sections 16 and 18.
  • the drum sections 16 and 18 are connected to a screw drive (not shown) extending through the dram shaft 12 and rotatable to adjust the spacing of the inboard dram section 18 and the outboard drum section 16 and thereby provide the desired spacing of an inboard bead pocket assembly 24 and an outboard pocket assembly 26 mounted on the dram sections 18 and 16 respectively.
  • the inboard bead pocket assembly 24 has a plurality of circumferentially spaced expandable cylindrical segments 28. In this embodiment there are eight segments 28 and each of the segments is mounted on a radially extending spoke 30 supported in a slot 32 in a cylindrical frame 34 mounted on the inboard dram section 18.
  • the spoke 30 may have a cam roller 36 for rolling engagement with a cam surface 38 on an axially extending sliding cam 40.
  • Each sliding cam 40 may be connected to a piston cylinder assembly 42 mounted on the inboard dram section 18.
  • a piston 44 of the piston cylinder assembly 42 is connected to the cam 40 and is movable upon communication of air pressure to a cylinder 46.
  • the air pressure may be factory air pressure of 100 p.s.i. (7.03 kg sq cm) and with the enlarged diameter of the piston 44 provides a substantially high pressure for extending the spoke 30 radially outward and moving the cylindrical segment 28 radially outward.
  • Each cylinder segment 28 has circumferentially extending fingers in meshing engagement with fingers of an adjacent segment to provide a continuous cylindrical surface 50 around the dram for supporting a shaping bladder 52.
  • each of the cylindrical segments 28 has a pocket 54 in the form of a circumferentially extending channel for receiving an inboard edge 56 and an outboard edge 58 of the bladder 52.
  • the outboard edge 58 of the bladder 52 may be enlarged with a thickness "t" of about 0.9 inches (2.28 cm) for seating in the pocket 54.
  • the thickness "t" of the outboard edge 58 is less than the depth "d" of the pocket 54 so that a tire bead 60 will not be pulled out of the respective pocket when the outboard dram section 16 and inboard drum section 18 are moved together to the spacing of the cured tire as shown in Fig. 2.
  • a sealing flap 62 has an outer edge 64 which is clamped between a nose piece 66 and corresponding cylinder segment 28 of each pocket 54.
  • the nose pieces 6 may be removed to install the outboard edge 55 of the bladder. Screws 68 may be used to fasten the nose piece 66 to the segment 28.
  • the sealing flap 62 also has an inner edge 70 which may be attached to a flange 72 connected to the inboard dram section 18.
  • the dram 10 is shown in more detail supporting a tire 74 with bead apexes 76,76 positioned at the same spacing or distance "O" from the centerline X-X of the tire as the spacing of the beads for a cured tire.
  • the dram 10 is shown in the retracted condition with a tire band 74 supported on the dram.
  • An outboard bead apex 76 and an inboard bead apex 78 are shown positioned over the bead pocket assemblies 24 and 26.
  • the bead apex 76 and bead apex 78 are preshaped to the same shape they have in a cured tire and may be precured.
  • a carriage (not shown) with magnets may be used to carry the bead apexes 76 and 78 to the positions shown in Fig. 1 where they are held until the tire band 74 is shaped.
  • the tire band 74 may also be assembled on a band dram (not shown) after which the band is transferred by means well known in the art to a position over the shaping dram 10 as shown in Fig. 1.
  • the tire band 74 shown in Fig. 1 includes an inner liner 80, a barrier 82, a ply 84, a sidewall 86 and other components such as chafers, fabric chafers, apex members and gum chafers.
  • a tread belt assembly 88, shown in Fig. 2 may also be preassembled and transferred to a position over the dram 10 prior to expansion of the dram.
  • Inflation means is provided in communication with the space. "A" enclosed by the tire 74 and sealing flaps 62.
  • the inboard bead pocket assembly 24 and the outboard bead pocket assembly 26 are expanded by communicating air under pressure to the cylinder 46 of each inboard pocket assembly 24 and to cylinder 46' of each outboard pocket assembly 26, causing the cams 40 or 40' to engage the rollers 36 and 36' on the spokes 30 and 30' and move the spokes radially outward and expanding the cylindrical segments 28 and 28'.
  • the outboard bead apex assembly 76 and the inboard bead apex assembly 78 are then seated in the pockets 54 and 54' providing a sealed space "A" within the tire band 54,54'.
  • outboard drum section 16 and inboard drum section 18 are then moved together while the tire band 74 is inflated and expanded to the shape shown in Fig. 2. Also the shaping bladders
  • the tread-belt assembly 88 is positioned over the tire band 74 during the shaping and receives the expanded crown portion of the tire band as shown in Fig. 2.
  • the outboard dram section 16 and inboard drum section 18 are moved together by air pressure communicated to the piston cylinder assemblies 42 for each of the cylindrical segments 28.
  • a distance D which is in this embodiment is about 6 inches (15.18 cm). This distance is substantially the same as the distance between the beads 60,60' of the tire band 74 in the cured condition.
  • the shaping bladders 52,52' are then deflated and the tread belt assembly 88 is stitched to the tire band. In this manner the preshaped bead/apex assemblies 76 and 78 are positioned in the tire band with the other components which have now been shaped to the cured tire shape.
  • the tire band 54,54' may then be deflated and the spokes 30 may be retracted radially for removal of the assembled tire band 74, which is now ready for curing in a tire vulcanizer (not shown). It is evident that the tire band 74 in the fully cured shape may be cured in the tire vulcanizer with substantially little additional shaping and therefore avoid the possibility of altering the positions of the tire components. This is especially true with respect to the ply edges 92 and 92' where it is important that they not be pulled down during the vulcanization process.

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

Abstract

L'invention concerne un procédé et un dispositif (10) de mise à la forme d'un pneu. Dans ce dispositif, un ensemble extérieur (26) présentant une forme en creux et un ensemble intérieur (24) présentant une forme en creux sont déplaçables radialement vers l'extérieur pour être en prise avec des ensembles préformés talon/sommet (60, 76) d'une carcasse de pneu (74). Ces ensembles (24, 26) sont déplaçables axialement pour être amenés à une largeur des ensembles talon/sommet correspondant à la largeur du pneu vulcanisé. En outre le procédé et le dispositif selon l'invention servent à la mise en forme d'autres composants du pneu, et servent aussi à positionner les bords de plis en des emplacements préétablis du pneu vulcanisé.
PCT/US1998/018063 1998-09-01 1998-09-01 Procede et dispositif de fabrication de pneu WO2000012297A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU89249/98A AU8924998A (en) 1998-09-01 1998-09-01 Tire building method and apparatus
PCT/US1998/018063 WO2000012297A1 (fr) 1998-09-01 1998-09-01 Procede et dispositif de fabrication de pneu
US09/786,244 US6585022B1 (en) 1998-09-01 1998-09-01 Tire building method and apparatus
TW088112880A TW442383B (en) 1998-09-01 1999-07-29 Method of building a tire, tire building drum, and pocket assembly for a tire building drum
ZA9905324A ZA995324B (en) 1998-09-01 1999-08-20 Tire building method and apparatus.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1998/018063 WO2000012297A1 (fr) 1998-09-01 1998-09-01 Procede et dispositif de fabrication de pneu

Publications (1)

Publication Number Publication Date
WO2000012297A1 true WO2000012297A1 (fr) 2000-03-09

Family

ID=22267791

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/018063 WO2000012297A1 (fr) 1998-09-01 1998-09-01 Procede et dispositif de fabrication de pneu

Country Status (4)

Country Link
AU (1) AU8924998A (fr)
TW (1) TW442383B (fr)
WO (1) WO2000012297A1 (fr)
ZA (1) ZA995324B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1568475A1 (fr) * 2002-11-25 2005-08-31 Bridgestone Corporation Systeme de moulage de pneumatiques, systeme de production de pneumatiques comprenant celui-ci et procede de production associe
EP1671780A1 (fr) * 2004-12-17 2006-06-21 The Goodyear Tire & Rubber Company Segments interlacés pour le support de bourrelet pour un tambour de fabrication de pneu
CN109421301A (zh) * 2017-09-01 2019-03-05 固特异轮胎和橡胶公司 轮胎成型鼓

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281305A (en) * 1961-12-15 1966-10-25 Continental Gummi Werke Ag Tire building drum variable in diameter
US3990931A (en) * 1972-07-06 1976-11-09 Uniroyal, S.A. Tire building apparatus and method
EP0016570A1 (fr) * 1979-03-21 1980-10-01 Nrm Corporation Machine de confection de pneumatiques
US4226656A (en) * 1979-04-02 1980-10-07 The Goodyear Tire & Rubber Company Tire carcass assembly
EP0181984A1 (fr) * 1984-11-23 1986-05-28 The Goodyear Tire & Rubber Company Tambour pour la confection des pneumatiques
EP0492239A2 (fr) * 1990-12-24 1992-07-01 Bridgestone/Firestone, Inc. Vessie latéralement stabilisée pour retourner les couches des tringles pour tambour de fabrication de pneus
JPH0732446A (ja) * 1993-07-22 1995-02-03 Sumitomo Rubber Ind Ltd タイヤの製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281305A (en) * 1961-12-15 1966-10-25 Continental Gummi Werke Ag Tire building drum variable in diameter
US3990931A (en) * 1972-07-06 1976-11-09 Uniroyal, S.A. Tire building apparatus and method
EP0016570A1 (fr) * 1979-03-21 1980-10-01 Nrm Corporation Machine de confection de pneumatiques
US4226656A (en) * 1979-04-02 1980-10-07 The Goodyear Tire & Rubber Company Tire carcass assembly
EP0181984A1 (fr) * 1984-11-23 1986-05-28 The Goodyear Tire & Rubber Company Tambour pour la confection des pneumatiques
EP0492239A2 (fr) * 1990-12-24 1992-07-01 Bridgestone/Firestone, Inc. Vessie latéralement stabilisée pour retourner les couches des tringles pour tambour de fabrication de pneus
JPH0732446A (ja) * 1993-07-22 1995-02-03 Sumitomo Rubber Ind Ltd タイヤの製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 9515, Derwent World Patents Index; AN 95-110041, XP002100956 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1568475A1 (fr) * 2002-11-25 2005-08-31 Bridgestone Corporation Systeme de moulage de pneumatiques, systeme de production de pneumatiques comprenant celui-ci et procede de production associe
EP1568475A4 (fr) * 2002-11-25 2006-04-05 Bridgestone Corp Systeme de moulage de pneumatiques, systeme de production de pneumatiques comprenant celui-ci et procede de production associe
EP1671780A1 (fr) * 2004-12-17 2006-06-21 The Goodyear Tire & Rubber Company Segments interlacés pour le support de bourrelet pour un tambour de fabrication de pneu
CN109421301A (zh) * 2017-09-01 2019-03-05 固特异轮胎和橡胶公司 轮胎成型鼓
CN109421301B (zh) * 2017-09-01 2021-09-17 固特异轮胎和橡胶公司 轮胎成型鼓

Also Published As

Publication number Publication date
ZA995324B (en) 2000-02-22
AU8924998A (en) 2000-03-21
TW442383B (en) 2001-06-23

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