WO2006033364A1 - Dispositif et procédé de vulcanisation - Google Patents

Dispositif et procédé de vulcanisation Download PDF

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Publication number
WO2006033364A1
WO2006033364A1 PCT/JP2005/017405 JP2005017405W WO2006033364A1 WO 2006033364 A1 WO2006033364 A1 WO 2006033364A1 JP 2005017405 W JP2005017405 W JP 2005017405W WO 2006033364 A1 WO2006033364 A1 WO 2006033364A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
tire
inner mold
vulcanization
vulcanizing
Prior art date
Application number
PCT/JP2005/017405
Other languages
English (en)
Japanese (ja)
Inventor
Ryusaku Obuchi
Original Assignee
Bridgestone Corporation
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 Bridgestone Corporation filed Critical Bridgestone Corporation
Publication of WO2006033364A1 publication Critical patent/WO2006033364A1/fr

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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)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00—Pneumatic or solid tyres or parts thereof

Definitions

  • the present invention includes an outer mold that defines an outer shape of a tire and an inner mold that defines an inner shape of the tire, and pressurizes and heats a raw tire formed on the inner mold during vulcanization.
  • the present invention relates to a vulcanizing apparatus and a vulcanizing method.
  • a rubber material such as a carcass ply, a belt, and a tread rubber is sequentially pasted or wound on a main body portion of an inner mold.
  • the inner mold with the green tire formed in this way is set in the outer mold, and a vulcanization molding is performed by enclosing or circulating a pressurized heating medium such as hot air in the inner mold.
  • Patent Document 1 JP 2000-141380 A
  • the present invention has been made to solve the above-mentioned conventional problems in the inner mold vulcanization molding, and its purpose is to freely control the pressure and temperature of the pressurizing and heating medium to increase the pressure.
  • high temperature and high pressure are applied to the green tire to ensure adhesion between the interfaces of the laminated rubber layers and to prevent separation of the ribbon layer, thereby improving quality. It is.
  • the invention of claim 1 includes an outer mold that defines the outer surface shape of the tire and an inner mold that defines the inner surface shape of the tire, and the raw tire is formed by the outer mold and the inner mold.
  • a vulcanization mold for forming a toroidal cavity for vulcanization molding is provided, and the inner mold has a stretchable film body on its outer surface, and the inner mold outer surface and the aforementioned mold It is characterized in that means for supplying a pressurized fluid for pressing the green tire against the outer mold is provided between the film bodies.
  • the invention according to claim 2 is the vulcanizing apparatus according to claim 1, wherein the pressurized fluid is an incompressible fluid whose pressure and temperature can be controlled independently and is heated to a predetermined temperature. It is characterized by.
  • the means for supplying the pressurized fluid applies pressurized fluid recirculated from between the outer surface of the inner mold and the film body. Characterized by pressure / heating means!
  • the invention according to claim 4 is the vulcanizing apparatus according to any one of claims 1 and 3, wherein the green tire is formed by ribbon-wrapping a rubber material layer on an inner mold. It is characterized by that.
  • the invention of claim 5 includes a step of forming a green tire on the inner mold, a step of accommodating the inner mold in the outer mold, an outer surface of the inner mold, and an expansion / contraction attached to the outer surface. Supplying a pressurized fluid having a predetermined pressure between the flexible film body and the incompressible fluid. And a step of pressing the gear against the outer mold.
  • the invention of claim 6 is the vulcanization molding method according to claim 5, wherein the pressurized fluid is an incompressible fluid whose pressure and temperature can be controlled independently and is heated to a predetermined temperature. It is characterized by that.
  • the present invention by using an incompressible fluid as the heating and pressurizing medium, heat exchange with the inner mold is improved, the inner mold is efficiently heated, and the outer surface of the inner mold has heat resistance and Equipped with a stretchable membrane body, and during vulcanization, the incompressible fluid in which the heat and pressure are independently controlled to a predetermined value is transferred from the inside mold membrane to the inside mold membrane.
  • the raw tire is pressurized at a predetermined pressure in the vulcanizing mold from the initial stage of vulcanization and maintained at the predetermined pressure.
  • an incompressible fluid instead of hot air, the efficiency of heat exchange with the metal inner mold is increased, and the inner mold is heated faster.
  • a predetermined pressure and temperature can be applied to a raw tire at the initial stage of vulcanization. Therefore, during the vulcanization reaction, between the interfaces of the laminated rubber material layers constituting the raw tire. A high pressure can be applied to improve the adhesiveness, and a tire with excellent quality performance can be provided without rubber material peeling off at the interface.
  • Fig. 1 shows a cross-sectional view of a vulcanization mold of a vulcanizer.
  • the vulcanizing mold 1 includes a tread forming mold 2 constituting an outer mold, an upper side mold 3 and a lower side mold 4 arranged above and below the tread forming mold 2, It consists of a tread forming mold 2 and a toroidal inner mold 5 accommodated in a recess formed by upper and lower side molds 3 and 4, and each of these when the outer and inner molds are closed.
  • a toroid-like cavity is formed with a mold, and the green tire 10 is vulcanized and molded in this cavity.
  • the tread forming mold 2 is formed of a rigid body such as an aluminum base material or an iron base material, and has a molding surface for forming the outer shape of the tread portion 11 of the tire 10, and inside and outside in the radial direction thereof. Transfer It consists of many movable segments, and these segments form a ring as a whole.
  • the upper and lower side molds 3, 4 are made of a rigid body such as an aluminum base material or an iron base material, and have molding surfaces for forming the outer surface shape of the sidewall portion 12 of the tire 10. At least one of the side molds 3 and 4 is configured to be movable in the mold opening direction so that the raw tire can be inserted into the cavity and the vulcanized tire can be taken out. .
  • the inner mold 5 is a toroid-shaped metal rigid body such as an aluminum base material or an iron base material, and has a molding surface for forming the inner surface shape of the tire 10, and the outer surface of the inner mold 5
  • an incompressible fluid such as hot water, oil or other liquid is supplied through the inner mold 5 as a heating and pressurizing medium. It is done.
  • FIG. 2 is a diagram showing a change in pressure acting on the tire during vulcanization in comparison with the conventional one.
  • the inner mold 5 is heated with hot air, and the raw tire is thermally expanded by the heat conduction from the inner mold 5 to tread. Since the forming mold 2 and the upper and lower side molds 3 and 4 are pressurized, there is a time lag until the vulcanization start force green tire is heated and expanded and the pressure reaches a predetermined value, causing the above-mentioned problems.
  • the inner surface of the green tire is pressurized and pressed between the inner mold 5 and the film body, that is, the elastic body thin film 14. Since the incompressible fluid to be heated is supplied, the lower surface of the green tire is pressurized through the elastic thin film 14 simultaneously with the start of vulcanization, and the thermal expansion of the green tire due to the heating of the incompressible fluid force is added. The prescribed pressure is reached more quickly.
  • FIG. 3 is a diagram schematically showing a system for supplying a heating fluid into the inner mold 5.
  • the incompressible fluid is pressurized to, for example, 1 to: LOMpa by a hydraulic pump P having an arbitrary configuration, and is heated to a predetermined temperature, for example, 373 to 473 k by the heating device 15 and is supplied from the inlet 20 to the inside. It is fed into the side mold 5.
  • the incompressible fluid supplied from the inside of the inner mold 5 flows between the outer surface of the inner mold 5 and the inner surface of the elastic thin film 14, and from the outlet 21 to the conduit 23, the hydraulic pump P and It passes through the heating device H and is maintained and controlled at a predetermined pressure and temperature.
  • the incompressible fluid always circulates between the outer surface of the inner mold 5 and the elastic thin film 14, while the incompressible fluid is maintained at a substantially constant pressure and temperature. Maintained.
  • the heated and pressurized incompressible fluid is not limited to the above-described configuration, and the inner mold 5 and the inner mold 5 A configuration in which sealing is performed between the outer surface and the film body (elastic thin film) 14 can also be employed.
  • the elastic thin film 14 expands upon receiving the pressure of the incompressible fluid, presses the back surface of the raw tire, and heats to promote thermal expansion of the raw tire. And the upper and lower side molds 3 and 4 are in close contact with the inner surface. At that time, the interfaces are joined by a compressive force acting between the ribbon layer interfaces of the laminated rubber materials constituting the green tire.
  • the incompressible fluid is first used as compared with the case where the conventional hot air is sent into the inner mold by using the incompressible fluid to raise the temperature of the metal inner mold.
  • the heat exchange between the metal mold and the metal inner mold is greatly improved, so that the temperature of the inner mold can be increased rapidly, and the heat of the incompressible fluid is transferred to the green tire through the elastic thin film 14. Therefore, the temperature of the green tire itself is quickly increased and the thermal expansion of the tire is promoted.
  • the non-compressed fluid is pressurized to a predetermined high pressure, so in the initial stage of vulcanization, the tire is tread-molding mold 2, upper and lower side molds 3, 4 inner surfaces at the high pressure of the uncompressed fluid. Pressed. In this way, the rubber layer interface between the tire materials constituting the green tire is strongly compressed and strongly joined during the vulcanization reaction.
  • FIG. 1 is a cross-sectional view of a vulcanization mold according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing how the pressure acting on the back side of the green tire in the vulcanizing mold changes with time.
  • FIG. 3 is a diagram schematically showing a system for supplying an incompressible fluid to a vulcanization mold. Explanation of symbols 1 ... ⁇ Elastic thin film

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

Selon le procédé de l'invention une température élevée et une pression élevée sont appliquées, dans une phase initiale de vulcanisation du cœur, à un matériau de caoutchouc constituant un pneu brut pour joindre solidement l’interface d’une couche de caoutchouc. L’invention concerne un dispositif de vulcanisation comprenant une matrice de formation d’écartement des roues (2) pour définir la forme superficielle externe d’un pneu (10), une matrice supérieure et une matrice inférieure (3, 4) de même qu’une matrice interne (5) pour définir la forme superficielle interne du pneu (10). Le pneu brut (10) est moulé et vulcanisé dans une cavité définie par les matrices (2-4) et la matrice interne (5). La matrice interne (5) est pourvue, à la surface externe de celle-ci, d’un film mince étirable (14) d’un corps élastique, et le pneu brut (10) est dilaté par chauffage et pressurisé au moment de la vulcanisation à l’aide d’un fluide de chauffage/pressurisation non compressif que l’on injecte entre la surface externe de la matrice interne (5) et le film mince (14).
PCT/JP2005/017405 2004-09-22 2005-09-21 Dispositif et procédé de vulcanisation WO2006033364A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004-275839 2004-09-22
JP2004275839A JP2006088472A (ja) 2004-09-22 2004-09-22 加硫装置及び加硫方法

Publications (1)

Publication Number Publication Date
WO2006033364A1 true WO2006033364A1 (fr) 2006-03-30

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PCT/JP2005/017405 WO2006033364A1 (fr) 2004-09-22 2005-09-21 Dispositif et procédé de vulcanisation

Country Status (2)

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JP (1) JP2006088472A (fr)
WO (1) WO2006033364A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101863095A (zh) * 2010-06-25 2010-10-20 鞍山市宏图防腐工程有限公司 橡胶硫化新工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55150339A (en) * 1979-05-12 1980-11-22 Ohtsu Tire & Rubber Co Ltd Manufacturing of casting tire and flexible hollow core used therefor
JPH01113213A (ja) * 1987-09-30 1989-05-01 Uniroyal Goodrich Tire Co:The 肉厚物品の硬化方法及び装置
JPH04332611A (ja) * 1991-05-09 1992-11-19 Yokohama Rubber Co Ltd:The タイヤの温水加硫法における加熱媒体の回収方法
JP2003039436A (ja) * 2001-07-31 2003-02-13 Bridgestone Corp タイヤの加硫方法およびそれに用いる加硫金型
JP2003320534A (ja) * 2002-04-30 2003-11-11 Bridgestone Corp 空気入りタイヤの製造方法および装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55150339A (en) * 1979-05-12 1980-11-22 Ohtsu Tire & Rubber Co Ltd Manufacturing of casting tire and flexible hollow core used therefor
JPH01113213A (ja) * 1987-09-30 1989-05-01 Uniroyal Goodrich Tire Co:The 肉厚物品の硬化方法及び装置
JPH04332611A (ja) * 1991-05-09 1992-11-19 Yokohama Rubber Co Ltd:The タイヤの温水加硫法における加熱媒体の回収方法
JP2003039436A (ja) * 2001-07-31 2003-02-13 Bridgestone Corp タイヤの加硫方法およびそれに用いる加硫金型
JP2003320534A (ja) * 2002-04-30 2003-11-11 Bridgestone Corp 空気入りタイヤの製造方法および装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101863095A (zh) * 2010-06-25 2010-10-20 鞍山市宏图防腐工程有限公司 橡胶硫化新工艺

Also Published As

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