US20060137805A1 - Shaping drum for crown reinforcement plies - Google Patents

Shaping drum for crown reinforcement plies Download PDF

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Publication number
US20060137805A1
US20060137805A1 US11/313,557 US31355705A US2006137805A1 US 20060137805 A1 US20060137805 A1 US 20060137805A1 US 31355705 A US31355705 A US 31355705A US 2006137805 A1 US2006137805 A1 US 2006137805A1
Authority
US
United States
Prior art keywords
drum
ply
crown
diameter
adhere
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.)
Abandoned
Application number
US11/313,557
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English (en)
Inventor
Jacques Auclair
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Michelin Recherche et Technique SA Switzerland
Michelin Recherche et Technique SA France
Original Assignee
Michelin Recherche et Technique SA Switzerland
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 Michelin Recherche et Technique SA Switzerland filed Critical Michelin Recherche et Technique SA Switzerland
Assigned to MICHELIN RECHERCHE ET TECHNIQUE S.A. reassignment MICHELIN RECHERCHE ET TECHNIQUE S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AUCLAIR, JACQUES
Publication of US20060137805A1 publication Critical patent/US20060137805A1/en
Priority to US12/384,160 priority Critical patent/US8168021B2/en
Abandoned legal-status Critical Current

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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
    • B29D30/24—Drums
    • B29D30/242—Drums for manufacturing substantially cylindrical tyre components without cores or beads, e.g. treads or belts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10765—Characterized by belt or breaker structure

Definitions

  • the invention relates to the field of the manufacture of tyres, and in particular the field of the manufacture of crown reinforcement belts.
  • These crown reinforcement belts are usually composed of one or more plies stacked one on another. Each of these plies is formed from cables which are parallel to each other and are coated in a rubber-nature mix. These cables form a given angle with the circumferential direction of the tyre.
  • the cables may be constituted of one or more strands, which themselves are formed from unit cords made of textile or more generally of metal in the case of crown reinforcement plies.
  • the reinforcement belts are generally formed of at least two plies the cables of which form, relative to the circumferential direction, angles having opposite signs, of absolute values which are close to one another but not necessarily identical. Once in place, these plies effect triangulation with the plies of the carcass reinforcement, the cables of which generally form an angle of 90° with the longitudinal direction.
  • the crown reinforcement plies are laid after the carcass obtained in a first stage has been shaped, that is to say after a toric form has been imparted to the tyre blank of substantially cylindrical form.
  • Said carcass generally comprises a carcass reinforcement ply anchored at its two ends to rings for reinforcing the bead.
  • the belt plies are laid when the diameter of the blank is close to the definitive diameter of the tyre. This diameter is calculated to permit insertion of said final blank in the vulcanisation press.
  • Another method consists of producing the whole of the crown on a cylindrical form referred to as a crown form, the diameter of which is also close to the definitive diameter, and on which are deposited in succession the crown reinforcement plies and the profiled elements constituting the crown section of the tyre and comprising, inter alia, the tread.
  • the finished crown is then transferred by a transfer ring to the carcass which, by conforming thereto, adheres to the inner part of the crown.
  • a process for producing this particular form of crown belt is set forth in the aforementioned patent FR 2 037 520. It consists of depositing two crown reinforcement plies one on the other, making them adhere strongly over their entire length and over part of their width, and stretching the whole in the longitudinal direction.
  • One variant of this process consists of including a separating element over part of the width, so as to permit sliding of the plies and to define the zones of the ply edge in which it is desired to modify this angle. Once stabilised, the ply is laid directly on the carcass of the tyre which has beforehand been curved into its toric form.
  • the invention which is the subject of the present application relates to a process and a device for producing an assembly on a crown form of the crown reinforcement plies the cables of which form variable angles with the circumferential direction over their length, while precisely controlling the geometry and the position on the drum for laying the ring thus obtained.
  • the crown belt plies are assembled by positioning the drum at a first diameter.
  • the first crown belt reinforcement ply the reinforcement cables of which form a given angle with the circumferential direction, is deposited while activating the first and second means so as to make the entire ply adhere to the surface of the drum.
  • the second crown belt ply composed of reinforcement cables forming with the circumferential direction a given angle of the opposite sign to the angle of the reinforcing threads forming the first ply, is deposited. Then the second ply is made to adhere strongly to the first ply.
  • the second means are activated so as to permit sliding of the first ply level with said second means, and the drum is positioned at a second diameter greater than the first diameter.
  • crown reinforcement plies which may form a possibly zero angle with the circumferential direction but also rubber profiled elements, including the tread of the tyre.
  • the final production of the tyre then takes place entirely conventionally by gripping the crown thus produced using a transfer ring and depositing it on the shaped carcass.
  • FIG. 1 is a diagrammatic front view of a drum in accordance with the invention positioned at its first diameter
  • FIG. 2 is a diagrammatic front view of a drum in accordance with the invention positioned at its second diameter
  • FIG. 3 is a diagrammatic perspective view of the drum positioned at its first diameter
  • FIG. 4 is a diagrammatic perspective view of the drum positioned at its second diameter
  • FIG. 5 is a front view of a drum at its first diameter on which crown reinforcement plies have been deposited
  • FIG. 6 is a front view of a drum at its second diameter on which crown reinforcement plies have been deposited
  • FIGS. 7 to 9 are diagrammatic views of the main phases of operation of the holding means.
  • the drum 1 shown in FIG. 1 comprises a set of elements 2 arranged equidistantly about an axis of rotation XX′. These elements are radially mobile and make it possible to vary the substantially cylindrical surface of the drum from a first diameter D 1 to a second diameter D 2 .
  • Each element 2 has in its axial direction receptacles 20 , into which are placed the first holding means 3 and the second holding means 4 respectively.
  • the first holding means 3 are arranged axially in the middle of each of the elements 2 , which makes it possible to form a set of first holding means arranged circumferentially on the equator EE′ of the drum 1 .
  • the equator is defined as the intersection of a plane, perpendicular to the axis of rotation XX′ of the drum and extending axially in the middle of the surface of the drum, with the cylinder formed by the surface of said drum.
  • FIG. 7 An example of embodiment of a first holding means 3 is shown in FIG. 7 and can be likened to a tyre valve 40 .
  • the body of the valve 40 of substantially radial axis AA′, is arranged in the receptacle 20 of the element 2 .
  • the body of the valve 40 comprises a series of orifices 45 located on its lateral part. The orifices communicate with a chamber 46 .
  • the body of the valve contains a tubular slider 41 which slides along the same axis AA′ and comprises at each of its ends a seat 43 and an outlet 47 respectively.
  • the seat of the slider 43 lies on the bearing surface 44 under the action of the spring 42 , and prevents air from passing between the orifices 45 and the chamber 46 .
  • the body of the slider 41 comprises a conduit which connects the chamber 46 and the outlet 47 .
  • the outlet 47 is arranged so as to be radially slightly to the outside of the plane formed by the surface of the element 2 .
  • the orifices 45 are connected to a vacuum source (not shown).
  • the second means are similar to the first means. They are arranged axially on either side of the equator EE′. They nevertheless differ from the first means 3 in that the orifices 45 may be connected alternately to a vacuum source and function like suction cups, as explained previously, or to a pressurised air source. In this second case, the operation of the second means is illustrated in FIG. 9 .
  • the slider 41 is held in the retracted position by the action of the ply N 1 on the outlet 47 .
  • the air can then circulate freely in the direction of the arrows from the orifices 45 towards the outlet 47 .
  • a thin cushion of air is created between the surface of the element 2 and the ply N 1 , the effect of which is to promote the sliding of the ply on the surface of the drum located in the immediate vicinity of the outlet 47 .
  • the setting of the spring 42 and of the air pressure at the entrance to the orifices 45 is adjusted so as to permit closure of the communication between the chamber 46 and the orifices 45 when the ply N 1 is removed.
  • first means and second means based on pneumatics valves proves particularly simple to carry out.
  • first means which are electromagnetic in nature which may prove of particularly high performance when the belt plies of the crown are metal plies, is not ruled out.
  • FIG. 2 shows the drum 1 positioned at its diameter D 2
  • FIGS. 3 and 4 show the drum 1 at the diameters D 1 and D 2 in a perspective view.
  • the mechanisms controlling the radial movement of the elements 2 , and also the means enabling the drum to be supported and caused to rotate about the axis XX′ are widely known to the person skilled in the art and are not the subject of the present description, and so are not shown in the figures.
  • FIGS. 5 and 6 show, in diagrammatic view, the stages of the shaping of a crown reinforcement belt composed of two plies N 1 and N 2 of widths L 1 and L 2 respectively, L 2 generally being less than L 1 .
  • the reinforcement cables forming the plies form angles ⁇ 1 and ⁇ 2 , of opposite signs, with the circumferential direction.
  • the drum 1 is positioned at a first diameter D 1 and the orifices 45 of the second means are connected to a vacuum connection.
  • the outlets 47 of the sliders 41 are forced back radially, the effect of which, as has previously been seen, is to keep the ply N 1 securely in position on the surface of the drum 1 .
  • the centre of the ply is also made to coincide with the equator EE′ so as to ensure the geometric alignment of the constituents of the tyre relative to a known reference.
  • the triangulation of the plies By bringing the diameter of the drum to the diameter D 2 , the triangulation of the plies, the width of which changes from L 1 to L 1 ′ and from L 2 to L 2 ′ respectively, is brought about.
  • the angles ⁇ 1 and ⁇ 2 formed by the cables with the circumferential direction at the equator change respectively to the values ⁇ 1′ and ⁇ 2′ which are less than ⁇ 1 and ⁇ 2 respectively.
  • These values ⁇ 1′ and ⁇ 2′ are substantially constant over the length of the cables, but it is observed that these angles increase greatly at each of the ends of the cables in the edge zone of the plies N 1 and N 2 to impart an S-shaped form to the cables of the plies.
  • the difference between the angle formed by a cable with the circumferential direction at its ends may vary from 2° to 15° compared with the angle formed by the same cable with the circumferential direction at the centre of the ply.
  • the device as has just been described makes it possible to take advantage of this known phenomenon. This is because in reducing the pitch and increasing the cable density at the centre, the flexural strength of the crown is increased and the wear life of the tyre improved.
  • the shaping ratio is equal to the ratio of the second diameter D 2 and the first diameter D 1 .
  • the shaping ratio may vary between 1.03 and 1.5.
  • This method of implemention makes it possible, at the same time, to simplify the industrial complexity by reducing the reference number of plies of different pitches P 1 , and to give additional room for manoeuvre in the choice of cables which it becomes possible to select from among cables of lesser diameter, the use of which is permitted by increasing the density by shaping, in accordance with the process which is the subject of the invention, so as to obtain a structural resistance similar to that which would have been obtained with cables of greater strength and of a greater pitch.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
  • Tires In General (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
US11/313,557 2004-12-24 2005-12-20 Shaping drum for crown reinforcement plies Abandoned US20060137805A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/384,160 US8168021B2 (en) 2004-12-24 2009-04-01 Process for assembling a tire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0413955A FR2879957B1 (fr) 2004-12-24 2004-12-24 Tambour de conformation des nappes d'armature sommet
FR04/13955 2004-12-24

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/384,160 Division US8168021B2 (en) 2004-12-24 2009-04-01 Process for assembling a tire

Publications (1)

Publication Number Publication Date
US20060137805A1 true US20060137805A1 (en) 2006-06-29

Family

ID=34954280

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/313,557 Abandoned US20060137805A1 (en) 2004-12-24 2005-12-20 Shaping drum for crown reinforcement plies
US12/384,160 Expired - Fee Related US8168021B2 (en) 2004-12-24 2009-04-01 Process for assembling a tire

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/384,160 Expired - Fee Related US8168021B2 (en) 2004-12-24 2009-04-01 Process for assembling a tire

Country Status (8)

Country Link
US (2) US20060137805A1 (ja)
EP (1) EP1674250B1 (ja)
JP (1) JP4975323B2 (ja)
CN (1) CN100566984C (ja)
AT (1) ATE416909T1 (ja)
BR (1) BRPI0505591A (ja)
DE (1) DE602005011563D1 (ja)
FR (1) FR2879957B1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100116414A1 (en) * 2007-06-11 2010-05-13 Pirelli Tyre S.P.A. Process and apparatus for manufacturing tyres
WO2010126507A1 (en) * 2009-04-30 2010-11-04 Societe De Technologie Michelin Apparatus and method for forming tire belts having cords posed at variable angles
US20160176138A1 (en) * 2014-12-23 2016-06-23 The Goodyear Tire & Rubber Company Sleeveless tire building drum

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101172400B (zh) * 2006-11-02 2011-01-19 韩国轮胎株式会社 使用了电磁铁的轮胎成形滚筒
US20090151873A1 (en) * 2007-12-18 2009-06-18 Pinto Ricardo De Mello Sleeveless tire building drum
ITMI20121608A1 (it) * 2012-09-26 2014-03-27 Pirelli Metodo per controllare il confezionamento di una struttura di rinforzo di pneumatici per ruote di veicoli e processo ed apparato per la produzione di tali pneumatici
KR101512350B1 (ko) 2013-11-06 2015-04-15 한국타이어 주식회사 타이어 제조용 진공흡착식 성형드럼
CN105774007A (zh) * 2014-12-26 2016-07-20 鼎汉科技(厦门)有限公司 一种用于轮胎成型可膨胀收缩的布圈鼓装置
CN106273589A (zh) * 2015-05-23 2017-01-04 福建建阳龙翔科技开发有限公司 二段一次法子午线轮胎成型机
CN111674070A (zh) * 2020-06-12 2020-09-18 赛轮集团股份有限公司 一种新型轮胎成型机带束层鼓及轮胎成型方法
CN112848807A (zh) * 2021-01-29 2021-05-28 山东玲珑轮胎股份有限公司 一种曲面贴合鼓设计方法及曲面贴合鼓
CN114311781B (zh) * 2022-03-16 2022-05-20 山东华盛橡胶有限公司 一种全钢子午胎带束鼓及一种胎冠材料贴合方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503829A (en) * 1965-08-25 1970-03-31 Continental Gummi Werke Ag Pneumatic tire building machine
US4976804A (en) * 1989-05-05 1990-12-11 The Goodyear Tire & Rubber Company Expandable tire building drum
US20010000582A1 (en) * 1997-09-24 2001-05-03 Continental Aktiengesellschaft Process and drum for constructing a green tire
US20030051816A1 (en) * 2001-09-14 2003-03-20 Cavalotti Marie-Laure Benedicte Josette False Drum with a variable area vacuum-surface
US20030168152A1 (en) * 2001-06-19 2003-09-11 Nobuyuki Suda Method of forming tire component member

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US3373066A (en) * 1964-01-02 1968-03-12 Uniroyal Inc Method and intermediate article of manufacture for making radial tires
DE2008729A1 (de) 1969-03-06 1971-01-07 Pirelli S p A , Mailand (Italien) Verfahren zum Herstellen von Verstar kungsgebilden, insbesondere als Gürtel oder Breaker von Luftreifen
SU444690A1 (ru) 1973-05-14 1974-09-30 Научно-Исследовательский Конструкторско-Технологический Институт Шинной Промышленности Приспособление дл удержани ленточного материала
JPS5225876A (en) * 1975-08-25 1977-02-26 Mitsubishi Heavy Ind Ltd Apparatus for forming breaker layer of radial tire
IT1099513B (it) * 1978-10-25 1985-09-18 Pirelli Procedimento e apparecchiatura per la fabbricazione di pneumatici radiali
GB8312994D0 (en) * 1983-05-11 1983-06-15 Dunlop Ltd Tyre building machinery
JPH07112762B2 (ja) 1987-10-13 1995-12-06 住友ゴム工業株式会社 空気入りラジアルタイヤ
IT1236885B (it) * 1989-12-19 1993-04-26 Pirelli Procedimento per la fabbricazione di pneumatici con profilo torico ad elevata curvatura trasversale,apparato per la sua attuazione e prodotto ottenuto
JPH071603A (ja) * 1993-06-15 1995-01-06 Bridgestone Corp グリーンタイヤ成型ドラム用ゴムバンド
JPH07164555A (ja) * 1993-12-14 1995-06-27 Bridgestone Corp タイヤ成型ドラム
JP3737602B2 (ja) * 1997-03-04 2006-01-18 住友ゴム工業株式会社 タイヤの製造方法及び同装置
FR2797213B1 (fr) 1999-08-02 2002-08-30 Michelin Soc Tech Procede de fabrication d'un pneumatique avec preconformation d'une nappe de carcasse radiale pour rendre obliques les cables de la partie centrale
JP2001212889A (ja) * 2000-02-02 2001-08-07 Bridgestone Corp タイヤ成型ドラム、タイヤの製造方法及び一対のタイヤ補強部材固定ガイド
US6343638B1 (en) * 2000-02-23 2002-02-05 The Goodyear Tire & Rubber Company Tire belt folding drum
JP4685276B2 (ja) * 2001-06-12 2011-05-18 住友ゴム工業株式会社 ベルト成形ドラム
JP2004034613A (ja) * 2002-07-05 2004-02-05 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤの製造方法及びその方法により製造された空気入りラジアルタイヤ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503829A (en) * 1965-08-25 1970-03-31 Continental Gummi Werke Ag Pneumatic tire building machine
US4976804A (en) * 1989-05-05 1990-12-11 The Goodyear Tire & Rubber Company Expandable tire building drum
US20010000582A1 (en) * 1997-09-24 2001-05-03 Continental Aktiengesellschaft Process and drum for constructing a green tire
US20030168152A1 (en) * 2001-06-19 2003-09-11 Nobuyuki Suda Method of forming tire component member
US20030051816A1 (en) * 2001-09-14 2003-03-20 Cavalotti Marie-Laure Benedicte Josette False Drum with a variable area vacuum-surface

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100116414A1 (en) * 2007-06-11 2010-05-13 Pirelli Tyre S.P.A. Process and apparatus for manufacturing tyres
US9216551B2 (en) * 2007-06-11 2015-12-22 Pirelli Tyre S.P.A. Process and apparatus for manufacturing tyres
US10155351B2 (en) 2007-06-11 2018-12-18 Pirelli Tyre S.P.A. Process and apparatus for manufacturing tyres
WO2010126507A1 (en) * 2009-04-30 2010-11-04 Societe De Technologie Michelin Apparatus and method for forming tire belts having cords posed at variable angles
US20160176138A1 (en) * 2014-12-23 2016-06-23 The Goodyear Tire & Rubber Company Sleeveless tire building drum

Also Published As

Publication number Publication date
JP2006192895A (ja) 2006-07-27
ATE416909T1 (de) 2008-12-15
US20090188609A1 (en) 2009-07-30
US8168021B2 (en) 2012-05-01
CN1792624A (zh) 2006-06-28
CN100566984C (zh) 2009-12-09
JP4975323B2 (ja) 2012-07-11
DE602005011563D1 (de) 2009-01-22
FR2879957A1 (fr) 2006-06-30
FR2879957B1 (fr) 2007-03-02
EP1674250A1 (fr) 2006-06-28
EP1674250B1 (fr) 2008-12-10
BRPI0505591A (pt) 2006-09-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MICHELIN RECHERCHE ET TECHNIQUE S.A., SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AUCLAIR, JACQUES;REEL/FRAME:017413/0257

Effective date: 20051214

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION