• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A vulcanization device (1) for a tire comprising: a mold (4) for vulcanization comprising molding parts defining between them a cooking chamber (7), and cooperating with a central part (18) for supporting and putting into communication of a heat transfer fluid inlet with said cooking chamber (7), according to the invention, said central portion (18) comprises heating elements (37, 42, 50) which are distinct from the means for heating the heat transfer fluid which is located in the cooking chamber (7).
    公开号:FR3028444A1
    申请号:FR1461186
    申请日:2014-11-19
    公开日:2016-05-20
    发明作者:David Michael Massoptier；Franck Guerin；Thomas Simonelli
    申请人:Michelin Recherche et Technique SA Switzerland ；Compagnie Generale des Etablissements Michelin SCA；Michelin Recherche et Technique SA France；
    IPC主号:
    专利说明:

    [0001] The invention relates to the field of tire manufacturing and more particularly to tire vulcanization devices. BACKGROUND OF THE INVENTION Traditionally, these devices are formed of a press comprising a lower bowl and an upper bowl, or lid, whose function is to contain a baking mold and keep it in a closed position during the vulcanization period. As a rule, the mold is connected to the press by two flat surfaces more commonly referred to as trays. [003] The mold, specific to a tire size, is formed by all the parts intended to be placed in contact with the tire to be vulcanized and comprises shells, lower and upper, intended to mold the zone of the flanks, heel rings, lower and upper, intended to mold the beads and the lower zone of the sidewalls, and a set of sectors bearing the imprint of the tread and movable radially under the action of a clamping ring. [4] The internal walls of the mold parts define a cooking chamber intended to be brought into contact with the uncured tire blank. Inside the tire a heat transfer fluid under pressure makes it possible to apply the pressure and to press the blank against the internal walls of the mold as well as to provide the thermal energy necessary for the vulcanization. Part of the thermal vulcanization energy can also be provided to the tire blank from outside, via shells and sectors. [5] In general, a cooking membrane is installed in the central part of the cooking chamber, between two trays, lower and upper, and is deployed under the effect of the pressure of the heat transfer fluid, so that interposing between said coolant and the radially inner portion of the tire. The heat transfer fluid, generally pressurized steam or nitrogen, circulates in the vulcanization device between a supply source and the cooking chamber. [6] The heat transfer fluid is introduced inside the chamber either by being heated beforehand or by being heated by heating elements placed inside the cooking chamber. However, it has been found that, in both cases, because of the high thermal inertia of the parts making up the mold and the press, for a given cooking temperature, the first firing is not done at the right temperature, which causes defects in the tires. [7] To overcome this problem, one solution has been to set a higher setpoint temperature during the first cooking and then to decrease it thereafter. However, it has been found that such a solution is not suitable and this always because of the high thermal inertia of the cooking assembly which accumulates heat and then overheats the tire. [8] Document EP 0 686 492 discloses a unit for heating and mixing a load of heat transfer fluid under pressure comprising a turbine 10 actuated by an electric motor and a heating resistor, these elements being arranged in the enclosure of baking of a vulcanizing press. More particularly, the turbine and its electric drive motor are enclosed in a sealed chamber containing the coolant. An electrical resistance is also immersed in the heat transfer fluid and the temperature of the coolant fluid is regulated by acting on the heat flux dissipated by the resistor. A solution to remedy, using the device described in this document, the drawbacks associated with setting the system to the correct temperature during first cooking is to adjust the cooking time as a function of the number of cooking operations carried out. . For this, correctors are set up which adjust the cooking parameters, in particular the temperature and the pressure cooking time as a function of the number of cooking operations. Thus, in an example of a baking of a passenger car tire, for a molding part temperature of about 174 ° C during the first baking whose cooking temperature is equal to 180 ° C, it establishes a duration of cooking under pressure equal to about 14 min, whereas for the same tire, when the temperature of the molding parts is stabilized after several successive firings, and for the same cooking set point temperature, the pressure time is 9, 5 min. Different values of these parameters had to be established for intermediate instructions and must be applied to each cooking. In addition, these values of the various parameters must be applied to each tire dimension. [9] It is thus possible, of course, to obtain good cooking of the tire by applying these correctors for each cooking cycle, but at the expense of the productivity of the vulcanization press and also for a higher maneuvering cost, given the settings. which are to be done for a fairly large number of cooking cycles. The object of the invention is to provide a tire vulcanizing device and method which overcomes these drawbacks. [11] For this purpose, the invention proposes a vulcanization device for a tire comprising a vulcanization mold comprising molding parts defining between them a cooking chamber, and cooperating with a central part of support and putting into communication of a heat transfer fluid inlet with said cooking chamber, characterized in that said central portion comprises heating elements which are distinct from the heating means of the coolant which is in the cooking chamber. According to the invention, the central part of the mold which serves as a support and put in communication of the cooking chamber with the heat transfer fluid inlet in the enclosure comprises clean heating elements, other than those used. for heating the coolant of the cooking chamber. It is thus possible to achieve the heating of the central portion of the mold independently of that of the chamber, it is understood to values of the temperature and at different times with respect to the cooking chamber. This makes it possible to bring about a temperature rise and a stabilization of the temperature of the mold before starting the baking of the tire. [013] This limits the temperature losses of the heating from the cooking chamber and thus obtains a cooking of the tire with the correct temperature and pressure cooking time parameters from the first baking. This makes it possible to suppress the various value correctors of the cooking parameters which took into account the number of firings and thus to gain in productivity and in labor cost. [014] Preferably, the device comprises a vulcanization membrane held by its heels on trays and said central portion comprises a housing arranged in an opening of a tray. [015] Advantageously, said heating elements are electric heating elements that condense heat the housing. [016] In an advantageous embodiment of the invention, said heating elements comprise a ring provided with an electric heating resistor which is fixed on the base of the housing. [017] In another advantageous embodiment of the invention, said heating elements comprise several heating cartridges fixed on the base of the housing. [18] In yet another advantageous embodiment of the invention, said heating elements comprise a heating mat arranged on the periphery of the housing. [19] Advantageously, said central portion comprises a temperature sensor connected to means for regulating the power of said heating elements. [20] Preferably, said housing supports a heating and ventilating unit for the heat transfer fluid inside the cooking chamber. [21] Advantageously, said housing sealingly closes the cooking chamber. [22] Preferably, the temperature setpoint values measured with said probe are between 130 and 150 ° C. [023] The objects of the invention are also achieved with a method of vulcanizing a tire using a vulcanizing device according to the invention, comprising a vulcanization mold comprising molding parts defining between them a cooking chamber and cooperating with a central support part and placing in communication a heat transfer fluid inlet with said cooking chamber, characterized in that it comprises a step of heating said central portion made independently of that of heating the fluid in the cooking chamber. [024] Advantageously, the heating step of said central portion is performed before that of heating the cooking chamber. [025] The invention will be better understood thanks to the following description, which is based on the following figures: Figure la is a sectional view of the vulcanization device according to a first embodiment of the invention and Figure 1b an enlarged view of detail B of Figure 1a; FIG. 2 is a sectional view of the vulcanization device according to a second embodiment of the invention; FIG. 3 is a sectional view of the vulcanization device according to a third embodiment of the invention. [026] In the different figures, identical or similar elements bear the same reference. Their description is not systematically repeated. [027] In Figure 1 is shown, in an axial sectional view, a vulcanization device 1 illustrated during a vulcanization operation of a tire 2. In the example shown in the figures, the vulcanization process uses a vulcanizing membrane 3 which contains a coolant during the vulcanization operation of the tire. Preferably, the coolant is a neutral gas, such as, for example, nitrogen. The membrane 3 defines with the molding parts of a mold 4, in particular the rings of the beads 5, 6, the upper and lower shells, and all the circumferential sectors (not shown in the drawings) a cooking chamber 7. The mold 4 thus formed, shown schematically by broken lines in the figures, has a symmetry of revolution about an axis X-X '. [28] The vulcanization membrane 3 is provided with heels 8 which are fixed on trays 10, 12 with the aid of the flanges 14. The plate 12 has a generally annular shape and allows the passage at its center of a sliding rod maneuver (not shown in the drawings) which passes through a protective sleeve 16.
    [0002] One of the ends of the sliding rod is fixed to the plate 10 and the other end to a drive mechanism in translation along the axis XX 'in order to move the plate 10 and thus to allow the membrane 3 to deploy and bend in operation. [29] The plate 12 supports a central portion 18 of the device which ensures the communication of the heat transfer fluid with the cooking chamber 7 and the support of the heat transfer fluid inlet duct. In the examples shown in the accompanying figures, the central portion 18 also supports a heating and ventilation unit 20 of the coolant. The central portion 18 is defined at the central passage in the plate 12, said passage being closed by a housing 22. The housing 22 is fixed on the plate 12 for example by a screw fastener. The housing 22 encloses an electric motor 24 whose stator 25 is fixed to the housing 22 via a flange 26 and the rotor 27 is mounted on a tube 28, itself mounted on bearings 28 keyed on the sleeve 16. The tube 28 drives in rotation a turbine 30 formed by blades 31. The turbine is arranged around an electrical resistor 32. The electrical resistor 32 is supported by the flange 26 and is supplied with energy 3028444 6 at its connection pads 33. The housing 22 is made of a conductive metal material, for example aluminum. [030] The coolant is introduced inside the cooking chamber 7 and is extracted from it via a conduit 35 provided with a self-closing valve, the duct being supported at one of its ends of the housing base 22. In a manner similar to the device described in EP 0 686 492, the cooking chamber 7 forms with the housing 22 and the operating rod of the plate 10 a sealed enclosure inside which circulates the coolant, sealing rings being provided for this purpose between the various components of the central portion 18. [031] As in the aforementioned document, the coolant is introduced at ambient temperature and under pressure into the enclosure 7 and is then circulated by the turbine 30 being heated by the electrical resistance 32. [032] According to the invention, the central portion 18 has its own heating elements. More particularly in the embodiment of FIGS. 1a and 1b, a metal ring 36 is fixed on the base of the housing 22, outside thereof, and encloses an electrical resistance 37. The ring 36 is advantageously an aluminum ring and the electrical resistance 37 is a shielded resistor placed inside the ring 36. When energized, the electrical resistance 37 heats the housing 22 by conduction. [033] In the example of embodiment of Figure 2, a support member 40 coaxial with the axis XX 'carries a plurality of cylindrical heating cartridges 42 arranged with their longitudinal axis parallel to the axis X-X'. The support piece 40 comprises a ring 41 fixed on the base of the housing 22 concentrically to the axis X-X ', columns 43 which connect the ring 41 and a base 43, parallel to the ring 43. L The longitudinal axis of each column 43 is parallel to the axis XX 'and each column contains a heating cartridge 42, for example a shielded electrical resistance. The base of each column 43 is provided with orifices 45 for cooling the base 43 of the support piece 40. [034] In the example illustrated in FIG. 3, the casing 22 is heated by conduction 30 using an electrical heating mat 50 disposed at the periphery of the housing 22 on the lateral surface thereof. The heating mat 50 extends from the base of the housing 22 to a height equal to about 2/3 of its height. The membrane 3 has not been shown in FIGS. 2 and 3, but it is understood that it is held on the plates 10, 12 with the aid of the flanges, as in the example of FIGS. 1a and 3028444. . [35] A temperature sensor 38 mounted on the ring 36, respectively on the ring 41 sends the measured values of the temperature of the ring 36, 41 to a control unit (not shown in the drawings) which controls the temperature. supplying the shielded electrical resistor 37, respectively the heating cartridges 42 or the heating mat 50. [36] In operation, the control unit controls the heating of the ring 36, 41 at a pre-set recording temperature included between 130 and 150 ° C, depending on the type of tire to be vulcanized. As soon as the set temperature is reached, the control unit 10 informs the central control unit of the vulcanizer that the vulcanization cycle can begin. The tire blank being loaded into the vulcanization device and the heat transfer fluid under pressure being present in the cooking chamber, it is controlled to circulate it by the rotation of the turbine 30 and its heating by the resistance 32 at a pre-set return temperature and for a given pressure cooking time, these parameters being set depending on the tire to be vulcanized. Thus, for a passenger car tire, a set temperature is set when cooking at 180 ° C. and a cooking time under pressure of 9.5 min, these parameters being kept constant during all the cooking operations carried out with the device. vulcanization of the invention. This is due to the fact that the central part of the mold is at the right temperature from the start and no longer acts as a heat sink through which the calories flowing from the cooking chamber 7 flow. to ensure cooking in the preset optimal parameters from the start and during all the cooking with the vulcanization device of the invention, which allows to gain productivity, the heating of the central part can be done in masked time ( for example during the loading of the tire in the mold). [37] The embodiments described above are of course not limiting and one skilled in the art may consider other equivalent means for heating independently the central portion of the vulcanizer. Thus, a cylindrical electrical heating element in the form of an electric heating film may be arranged on the cylindrical lateral surface, outside and / or inside the housing 22. The use of other electric heating means, such as induction heating means can also be envisaged, the housing 22 then being made of a ferromagnetic material. [038] It is also conceivable to apply the solution of the invention to a vulcanization device in which the coolant is heated in a circuit located upstream of the cooking chamber, such fluid may be water, steam mixed or not with a neutral gas or even a neutral gas. 5
    权利要求:
    Claims (12)
    [0001]
    CLAIMS1) Device (1) vulcanizing tire comprising - a vulcanization mold (4) comprising molding parts defining between them a cooking chamber (7), and cooperating with a central portion (18) support and placing in communication a heat transfer fluid inlet with said cooking chamber (7), characterized in that said central portion (18) comprises heating elements (37, 42, 50) which are distinct from the heating medium of the heat transfer fluid which is located in the cooking chamber (7).
    [0002]
    2) Device according to claim 1, characterized in that it comprises a membrane (3) of vulcanization maintained by his heels (8) on trays (10, 12) and in that said central portion (18) comprises a housing (22) arranged in an opening of a tray (12).
    [0003]
    3) Device according to claim 2, characterized in that said heating elements (37, 42, 50) are electric heating elements that conductive heat the housing (22).
    [0004]
    4) Device according to one of claims 2 or 3, characterized in that said heating elements comprise a ring (36) provided with an electric heating resistor (37) which is fixed on the base of the housing (22).
    [0005]
    5) Device according to one of claims 2 or 3, characterized in that said heating elements comprise several heating cartridges (42) fixed on the base of the housing (22).
    [0006]
    6) Device according to one of claims 2 or 3, characterized in that said heating elements comprise a heating web (50) arranged on the periphery of the housing (22).
    [0007]
    7) Device according to one of the preceding claims, characterized in that said central portion (18) comprises a temperature sensor (38) connected to means for regulating the power of said heating elements (37, 42, 50). 3028444 10
    [0008]
    8) Device according to one of claims 2 to 7, characterized in that said housing (22) supports a heating unit and ventilation (20) of the heat transfer fluid inside the cooking chamber (7).
    [0009]
    9) Device according to the preceding claim, characterized in that said housing (22) 5 sealingly closes the cooking chamber (7).
    [0010]
    10) Device according to one of claims 7 to 9, characterized in that the temperature setpoint values measured with said probe (38) are between 130 and 150 ° C.
    [0011]
    11) A method of vulcanizing a tire with a vulcanization device 10 according to one of claims 1 to 10, comprising vulcanization mold (4) comprising molding parts defining between them a cooking chamber (7). ) and cooperating with a central portion (18) for supporting and placing in communication a heat transfer fluid inlet with said cooking chamber (7), characterized in that it comprises a step of heating said central portion (18). ) independently of that of heating the fluid in the cooking chamber (7).
    [0012]
    12) Process according to claim 11, characterized in that the step of heating said central portion (18) is performed before that of heating the coolant.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB2091173A|1981-01-14|1982-07-28|Michelin & Cie|Apparatus for heating pneumatic tyre assemblies under pressure|
    EP0578105A2|1992-07-01|1994-01-12|Bridgestone Corporation|Road vehicle tire curing reactor|
    US6474968B1|1999-09-17|2002-11-05|Kabushiki Kaisha Kobe Seiko Sho |Vulcanizer|
    US20060012076A1|2002-04-29|2006-01-19|Renato Caretta|Method and apparatus for moulding and curing a tyre for vehicle|
    US20080277815A1|2004-05-06|2008-11-13|Bridgestone Corporation|Tire Vulcanizing Method and Method of Setting Tire Vulcanization Process|
    WO2013164282A1|2012-05-02|2013-11-07|Compagnie Generale Des Etablissements Michelin|Chamber for vulcanizing the inner portion of a tire and including a fan|
    DE102012108803A1|2012-09-19|2014-03-20|Continental Reifen Deutschland Gmbh|Device for vulcanization of vehicle tire, has shell and/or ring thermally decoupled from upper mold plate of vulcanization container and center mechanism by circular heat insulation at shell such that temperature difference is adjusted|
    JPH0316249B2|1983-03-14|1991-03-05|Kazumasa Sarumaru|
    IT1240402B|1990-07-17|1993-12-10|Firestone Int Dev Spa|TIRE VULCANIZATION DEVICE|
    FR2720972A1|1994-06-09|1995-12-15|Sedepro|Vulcanization of tires: intake of calories from the inside.|
    CN2701616Y|2004-03-09|2005-05-25|广东巨轮模具股份有限公司|Injection capsule mould|
    FR2966075B1|2010-10-19|2012-12-14|Michelin Soc Tech|DEVICE FOR VULCANIZING A TIRE COMPRISING AN INTERNAL RECOVERY ENCLOSURE|EP3192647B1|2016-01-14|2019-03-06|Compagnie Générale des Etablissements Michelin|Operation of a tire vulcanization system|
    EP3192648B1|2016-01-14|2019-03-06|Compagnie Générale des Etablissements Michelin|Regulating temperature during tire vulcanization|
    FR3048913B1|2016-03-21|2018-03-09|Compagnie Generale Des Etablissements Michelin|MAXIMIZE THE LIFETIME OF GUIDING MEANS IN TIRE VULCANIZATION SYSTEMS WITHOUT AFFECTING THERMAL STABILITY|
    CN111923462B|2020-10-15|2021-01-12|永一橡胶有限公司|Curing bladder mechanism and using method thereof|
    法律状态:
    2015-11-19| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-20| PLSC| Search report ready|Effective date: 20160520 |
    2016-11-18| PLFP| Fee payment|Year of fee payment: 3 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1461186A|FR3028444B1|2014-11-19|2014-11-19|DEVICE AND METHOD FOR VULCANIZING TIRES|FR1461186A| FR3028444B1|2014-11-19|2014-11-19|DEVICE AND METHOD FOR VULCANIZING TIRES|
    PCT/EP2015/077125| WO2016079249A1|2014-11-19|2015-11-19|Device and method for vulcanizing tyres|
    EP15798046.7A| EP3221136B1|2014-11-19|2015-11-19|Apparatus and method for vulcanizing tyres|
    CN201580062810.2A| CN107073856B|2014-11-19|2015-11-19|For tire curing device and method|
    MX2017006331A| MX2017006331A|2014-11-19|2015-11-19|Device and method for vulcanizing tyres.|
    US15/524,773| US10124550B2|2014-11-19|2015-11-19|Device and method for vulcanizing tires|
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