• 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:
    The mold (22) for the vulcanization of a tire according to the invention comprises a lining (2) for molding the tread of this tire, a movable valve (1) intended to ensure venting of the mold (22) , it is characterized in that the valve (1) is in one piece, this valve (1) being guided in a guide portion (200) belonging to the seal (2) and abutting on both sides said guide portion (200) for limiting the movement of the valve (1) in the liner (2) and that said valve (1) and said guiding portion (200) are made of the same material. The movable valve (1) thus produced is integral and non-removable from the guide portion (200), it is therefore faster and more accurate; it is retained in the guide portion (200) by two stops, and since it is made of the same material as the guide portion, they can be made at the same time. The mold (22) generally comprises a plurality of valves (1) for evacuating trapped air during molding of the tire.
    公开号:FR3024068A1
    申请号:FR1457062
    申请日:2014-07-22
    公开日:2016-01-29
    发明作者:Romain Calvel；Anthony Gueugneau
    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] FIELD OF THE INVENTION The present invention relates to movable elements arranged in a liner. BACKGROUND OF THE INVENTION Generally these movable elements must be mounted in the lining, such as a mold or more particularly a tire manufacturing mold, which requires a specific step that lengthens the manufacturing process. This is all the more critical as the parts are small because it forces a careful adjustment which further increases the manufacturing time and therefore its cost. It is also necessary to provide a system for keeping the part in the lining in order to prevent it from escaping.
    [0002] This movable element in a lining may for example be vented by mobile valves for the evacuation of air and which then close in contact with the rubber without leaving a teat on the rubber. The object of the present invention is to provide a mobile element manufactured in situ and which does not require specific mounting or holding system. The mold for the vulcanization of a tire according to the invention comprises a lining for molding the tread of this tire, which comprises a movable valve for venting the mold, it being characterized in that the valve is in one piece, this valve being guided in a guide portion belonging to the seal and abutting on either side of this guide portion to limit the movement of the valve in the seal and in that this valve and this guide part are made of the same material. The movable valve thus formed is integral and non-removable from the guide portion, which allows a time saving and a better positioning accuracy; it is retained in the guide portion by two stops, and since it is made of the same material as the guide portion, they can be made at the same time. The mold generally includes a plurality of valves for venting entrapped air during tire molding. According to a particular provision, the guide portion belongs to a chimney adapted to be detached from the rest of the liner. It is thus adapted to be reported in a mold made of a material different from the mold which may be aluminum for example.
    [0003] Advantageously, the valve has a main body, a lower end and an upper end wider than the main body, each end having an equivalent diameter d1, the guide portion having an equivalent diameter D2, and in that d1 is greater than D2 so that the valve can abut with the guide portion. The valve is thus retained in the guide portion by its two ends which have a peripheral edge of any shape. This edge defines a diameter equivalent to that of a circle containing this edge, which means that the equivalent diameter corresponds to the largest dimension of the edge.
    [0004] Advantageously, the valve is adapted to assume an open position and a closed position and is configured to be flush in the closed position. Thus the guide portion is surmounted by a first zone of equivalent diameter D1, the upper end of the valve has an equivalent diameter d1 such that dl <Dl. The upper end defining the valve head is thus flush in the closed position. Advantageously, the ends are conical flared toward said ends. The valve can thus more easily be positioned in the first zone of the orifice, the flared shape makes it possible to direct the end into the orifice.
    [0005] Advantageously, the movable valve has a guided portion of height h2 and the zone of the second diameter D2 has a height H2 smaller than the height h2. The difference in height of the guided portion and the diameter area D2 of the guide portion defines the movement of the valve in the guide portion. The height h2 of the movable valve being longer than the height H2 of the guide portion of the orifice in which it is placed, the movable valve can therefore move with an amplitude equal to the difference between the two heights h2 and H2 . In a particular arrangement the main body and the ends 10 of the valve are cylindrical. This form is particularly suitable when the guide portion and the first zone are preferably also cylindrical. In another arrangement, the main body is non-cylindrical. It may for example be rectangular, square or triangular. In this case the guide portion and the first zone will preferably also be non-cylindrical, either rectangular, square or triangular. In a particular arrangement, the upper end of the valve has an upper face with at least one non-through hole. The hole is preferably central located on the molding face side, it constitutes a hooking system for opening the movable valves after molding the tire. In fact, unlike the valves of the state of the art, the movable valves according to the invention do not have a return spring, here this function is generated by the penetration of the rubber in the central non-opening hole which, at demolding, will pull the valve upward to open it. This hole can be straight, with undercut, dovetail, have a multiform shape (cruciform, multi hole ...), it will also serve the orifice cleaning system by moving the movable valve to clear the gum or other residue that may be blocked. This will be done either by a rotation through the hole on the inner side of the mold on the top of the movable valve with a standard tool such as a screwdriver, screwdriver or specific tooling. It is also possible to have a magnet in the hole to rotate with a bipolar magnet or an electromagnet. In another arrangement the lower end of the valve has a lower face with a central hole, at least partly conical. The lower face 5 corresponds to the manufacturing side of the plate. The hole, which can be tapered, reduces the volume of the valve (saving time, weight and cost of manufacture) and facilitates the manufacture because it allows to mount the side plate side with a minimum of support. Just support the lower end of the valve and the rest of the end 10 is manufactured without support thanks to a manufacturing angle (> 25 °), which avoids a very wide support that is difficult then to separate from the valve. The outer hole can also be used for the orifice cleaning system by moving the movable valve to disengage the gum or other residue that could be jammed therein, this will be done by a cruciform type tool, hexagon socket, .. The method of manufacturing a movable valve in a liner or mold member according to the invention is characterized in that the lining or the chimney, the movable valve and the guiding portion are made during a single laser sintering operation of powders. The possibilities offered by the laser sintering method make it possible to envisage making this type of mobile valve without having to assemble it. Just leave a game during the manufacturing ranging from 0.05mm to 1mm. A clearance is left between the moving parts (between 0.1 and 0.5 mm, preferably 0.23 mm) and support supports are provided for the moving part which is then broken to release the mobility. The movable valve mounts have an individual grip surface on the very low movable valve, sufficient to support the valve during manufacture, but low enough to easily break after fabrication. The valve is manufactured at the same time as the seal, or at the same time as the chimney according to its disposition. Advantageously, a support holds the valve in mid-open position. The valve holding brackets during manufacture are sized such that the main body of the valve is spaced from the guide portion and the ends are spaced apart from the sides of the orifice so that the valve can easily to be detached from the liner to which it is attached. Advantageously, a powder thickness of at least 0.1 mm is left un-lased between the valve and the guide portion. The space where the powder is not sintered by laser leaves a free space between the parts that can thus move relative to each other. The thickness of 0.1mm is sufficient so that if a part is lased the link will be weak enough to break easily when one will try to move one of the parts. Other advantages may still be apparent to those skilled in the art on reading the examples below, illustrated by the appended figures given by way of example: FIG. 1 represents a perspective view of a mold according to FIG. 2 is a perspective view of a second variant of the mold according to the invention, FIG. 3 is a perspective view of a third variant of the mold according to the invention, FIG. Fig. 5 is a sectional view of the orifice; Figs. 6 and 7 are sectional and perspective views of a first example of a hole on the movable valve; FIGS. 8 and 9 are cross-sectional and perspective views of a second example of a hole on the movable valve, FIGS. 10 to 13 are other examples of holes on the movable valve, FIGS. are cross-sectional and perspective views of another example of a hole on the movable valve. FIG. 16 is a sectional view of the valve, FIG. 17 shows various sections of the valve of FIG. 16, FIG. 18 is a sectional view of the mold of FIG. 1, FIG. Figure 20 is a sectional view of the mold with the valve during manufacture. In the description it will be considered that the top corresponds to the top of the figures and the bottom to the bottom of the figures. The assembly illustrated in Figure 1 comprises a movable valve 1 10 disposed in a liner 2 and a mold 22. The liner 2 comprises an orifice 20 in which is disposed the valve 1. The valve 1 is in one piece (d ' one piece) and is not removable from the liner 2. The liner 2 is placed in the mold 22. In the variant of Figure 2, the movable valve 1 is placed in a chimney 2 '. Here again, the valve 1 is in one piece and can not be dismantled. The chimney 2 'is intended to be arranged in a liner 2. The mold 22 may be of the same material as the valve and the chimney (FIG. 2) or of a different material such as aluminum (FIG. 3).
    [0006] FIG. 4 shows the characteristics of an exemplary movable valve 1. This movable valve 1 has a cylindrical diameter d with ends 11 of diameter d 1, its total height is h 1 and the height corresponding to the cylindrical part h2. The ends 11 are tapered and flared outward at an angle A1 for the upper end and an angle A2 for the lower end. The valve 1 has a hole 12 of diameter d3 and height h3. It also has a recess 13 in the lower part. The portion of diameter d constitutes a guided portion 14. FIG. 5 shows the mold 2 with the orifice 20. The orifice 20 is of substantially cylindrical shape with a zone 201 of a first diameter D1 partly upper and a zone 200 of a second diameter 02 smaller than the first diameter D1 below it, the zone 200 constitutes the guide portion of the valve 1. D2 is larger than the diameter d of the movable valve 1. The first zone 201 has a height H1 and the second zone 200 has a height H2.
    [0007] FIGS. 6 and 7 illustrate an example of a hole 12 with an undercut, FIGS. 8 and 9 a dovetail hole 120, FIGS. 10 and 12 multi-hole (three holes 121 or two holes 123), FIG. 11 the hole 122 is cruciform, the hole 124 is linear in Figure 13. The movable valve 1 also has a recess 13 in the lower part which is hexagon in Figures 14 and 15, to be able to operate but it could also be cruciform and thus constitutes a hooking system. The valve illustrated in FIG. 16 may have a rectangular, square, triangular or hexagonal profile (FIG. 17), in which case the orifice preferably has a similar profile wider by a few tenths of a millimeter in order to allow the movement of the valve. FIG. 18 shows a complete mold 22 with valves 1 according to the embodiment of FIG. 1. FIG. 19 shows a mold 22 complete with chimneys 2 '20 like those illustrated in FIG. 3. We will describe the process Manufacturing. FIG. 20 shows a valve in a manufacturing support, this support comprises a manufacturing platform 4, packing supports 3, and valve supports 5. The packing 2 and the movable valve 1 are made in one piece by laser sintering of powders, the movable valve 1 is connected to the manufacturing plate by the valve supports 5 in order to make a single piece. The recess 13 makes it possible to support the lower end of the valve which is thus of reduced size and the remainder of the end is manufactured without support thanks to a manufacturing angle of> 25 °, which avoids the use of a very wide support for making a lower surface of the rectilinear valve which would then be difficult to separate from the valve.
    [0008] The supports 5 comprise refined parts (not shown) in connection with the valve 1 which are broken and removed in order to make it movable. The hole 12 which constitutes a hooking system can make it possible to move the movable valve 1 to detach the support elements 5 from the mobile valve 1. The lining supports 3 are removed by machining the rear face of the lining 2. The supports 5 can also be broken during the machining phase of the back of the gasket 2. In the case of an inclined manufacture of the gasket 2, the valve supports 5 are not necessarily necessary under the valves. Indeed, the clearance of 0.1 mm between the valve and the lining can locally allow agglomeration of the powder by diffusion of the heat of fusion and thus a local grip, this agglomeration will be broken by moving the valve 1.
    [0009] In use, the movable valve 1 is open when it is positioned in the up position and closed in the down position. This movable valve 1 allows venting in the tire manufacturing mold 22 by evacuation of the trapped air during the molding of the tire. The movable valve 1 is opened by adhesion of the eraser on the movable valve 1 or by penetration of rubber in the central hole 12 which does not open and which at the demolding will pull it upwards. Closing of the mobile valve 1 is achieved by the pressure of the rubber in contact during molding. The surface roughness obtained by this process allows a slight vent even after closing. The hole 12 is also a cleaning system, moving the movable valve 1 to disengage the gum or other blocked residue, rotate through the hole 12 on the top of the movable valve 1 with a standard screwdriver or screwdriver or with specific tools.
    权利要求:
    Claims (13)
    [0001]
    REVENDICATIONS1. Mold (22) for vulcanizing a tire comprising a lining (2) for molding the tread of said tire, a movable valve (1) for venting the mold, characterized in that the valve ( 1) is in one piece, this valve (1) being guided in a guide portion (200) belonging to the lining (2) and abutting on either side of this guide portion (200) to limit the movement of the valve (1) in the seal (2) and in that this valve (1) and this guide portion are made of the same material.
    [0002]
    2. Mold (22) according to claim 1, characterized in that the guide portion (200) belongs to a chimney (2 ') adapted to be detached from the rest of the liner (2).
    [0003]
    3. Mold (22) according to one of claims 1 to 2 characterized in that the valve (1) has a main body, a lower end and an upper end (11) wider than the main body, each end (11). ) having an equivalent diameter d1, the guide portion (200) having an equivalent diameter D2, and that d1 is greater than D2 so that the valve (1) can abut with the guide portion (200).
    [0004]
    4. Mold (22) according to one of the preceding claims, characterized in that the valve (1) is adapted to take an open position and a closed position and is configured to be flush in the closed position. 3024068 10
    [0005]
    5. Mold (22) according to one of claims 3 or 4 characterized in that the ends (11) are conical flared towards said ends (11).
    [0006]
    6. Mold (22) according to one of claims 3 to 5, characterized in that the movable valve (1) has a guided portion (14) of height h2 and the area of the second diameter D2 has a height H2 lower than the height h2. 10
    [0007]
    7. Mold (22) according to one of claims 3 to 6, characterized in that the main body and the guide portion (200) and the ends (11) of the valve are cylindrical.
    [0008]
    8. Mold (22) according to one of claims 3 to 6, characterized in that the main body and the guide portion (200) is non-cylindrical.
    [0009]
    9. Mold (22) according to one of claims 3 to 8, characterized in that the upper end of the valve (1) has an upper face with at least one hole (12) non-opening. 20
    [0010]
    10. Mold (22) according to one of claims 3 to 9, characterized in that the lower end of the valve (1) has a lower face with a central hole (13), at least partly conical. 25
    [0011]
    Method for manufacturing a mobile valve (1) of a mold according to one of the preceding claims, in a lining (2) or a chimney (2 '), characterized in that the lining (2) or the chimney ( 2 '), the valve (1) and the guiding part (200) are produced during the same laser sintering operation of powders. 3024068 11
    [0012]
    12. Method according to the preceding claim characterized in that a valve support (5) holds the valve (1) in mid-open position during manufacture. 5
    [0013]
    13. Method according to one of claims 11 or 12 characterized in that it leaves a powder thickness of at least 0.1 mm non-lasée between the valve (1) and the guide portion (200). 10
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    同族专利:
    公开号 | 公开日
    EP3172043A1|2017-05-31|
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    CN106470828A|2017-03-01|
    US10046531B2|2018-08-14|
    EP3172043B1|2020-02-12|
    FR3024068B1|2016-08-12|
    CN106470828B|2020-01-21|
    US20170197374A1|2017-07-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB922788A|1958-08-25|1963-04-03|Dunlop Rubber Co|Venting means for moulds|
    DE19543276C1|1995-11-20|1997-02-06|Continental Ag|Tire vulcanization mold with ventilation|
    US5939101A|1997-04-29|1999-08-17|Dunlop Tyres Ltd.|Mold vents|
    US6871831B1|2003-12-19|2005-03-29|The Goodyear Tire & Rubber Company|Mold vent|
    DE102004052766A1|2004-10-30|2006-05-04|Continental Aktiengesellschaft|Tire vulcanizing mold with a plurality of profile segments which can be joined together to form a circumferentially closed mold|
    US20090053354A1|2006-03-03|2009-02-26|Jaroslav Hajduch|Venting valve to be used in venting bores of vulcanization molds|
    WO2014060208A1|2012-10-17|2014-04-24|Compagnie Generale Des Etablissements Michelin|Part for a mould for a tyre, comprising an insert|
    NL7610516A|1975-09-30|1977-04-01|Sekisui Plastics|STEAM DRAINING DEVICE.|
    GB9623770D0|1996-11-15|1997-01-08|Sp Tyres Uk Ltd|Mould vents|
    JP5291976B2|2008-04-21|2013-09-18|東洋ゴム工業株式会社|Vent plug for tire vulcanization mold, tire vulcanization mold, and method for manufacturing pneumatic tire using tire vulcanization mold|
    JP5593688B2|2009-12-02|2014-09-24|横浜ゴム株式会社|Tire molding die plug, tire molding die and tire|JP6514049B2|2015-06-09|2019-05-15|株式会社ブリヂストン|Mold for rubber article and method for manufacturing mold for rubber article|
    DE102016209913A1|2016-06-06|2017-12-07|Continental Reifen Deutschland Gmbh|Venting unit for a vulcanization mold of a pneumatic vehicle tire|
    DE102018207743A1|2018-05-17|2019-11-21|Continental Reifen Deutschland Gmbh|Venting unit for a vulcanization mold of a pneumatic vehicle tire and vulcanization mold|
    CN112356349A|2020-10-15|2021-02-12|正新橡胶（中国）有限公司|Tire vulcanization mould and exhaust valve for tire vulcanization mould|
    法律状态:
    2015-06-26| PLFP| Fee payment|Year of fee payment: 2 |
    2016-01-29| PLSC| Publication of the preliminary search report|Effective date: 20160129 |
    2016-07-21| PLFP| Fee payment|Year of fee payment: 3 |
    2017-07-24| PLFP| Fee payment|Year of fee payment: 4 |
    2018-07-25| PLFP| Fee payment|Year of fee payment: 5 |
    2020-04-10| ST| Notification of lapse|Effective date: 20200306 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1457062A|FR3024068B1|2014-07-22|2014-07-22|MOLD FOR THE VULCANIZATION OF A PNEUMATIC COMPRISING MOBILE ELEMENTS OBTAINED BY LASER FRITTAGE|FR1457062A| FR3024068B1|2014-07-22|2014-07-22|MOLD FOR THE VULCANIZATION OF A PNEUMATIC COMPRISING MOBILE ELEMENTS OBTAINED BY LASER FRITTAGE|
    US15/327,910| US10046531B2|2014-07-22|2015-07-10|Mould for vulcanising a tire comprising movable elements obtained by laser sintering|
    CN201580036714.0A| CN106470828B|2014-07-22|2015-07-10|Mould for vulcanizing a tyre comprising a movable element obtained by laser sintering|
    PCT/FR2015/051908| WO2016012690A1|2014-07-22|2015-07-10|Mould for vulcanising a tyre comprising movable elements obtained by laser sintering|
    EP15753390.2A| EP3172043B1|2014-07-22|2015-07-10|Tire curing mould comprising moveable elements obtained by laser sintering|
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