• 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 mold member (18) for attachment to a mold (10) for tire vulcanization, the mold member (30) having a pattern (30) comprising a plurality of hollow or protuberant members from material with said mold member (18).
    公开号:FR3022831A1
    申请号:FR1401467
    申请日:2014-06-30
    公开日:2016-01-01
    发明作者:Anthony Gueugneau；Stephane Montzieux；Etienne Blanchet；Romain Calvel
    申请人:Michelin Recherche et Technique SA Switzerland ；Compagnie Generale des Etablissements Michelin SCA；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION [0001] The present invention relates to a tire mold element comprising a bearing surface and, on the contrary, a molding surface, intended for forming the outer surface of said tire. STATE OF THE PRIOR ART The surface of the tires supports a large amount of markings intended on the one hand to give technical information on the quality of the tire, and on the other hand to enable the consumer to distinguish the mark and the origin of the product. These markings are, as a rule, obtained by relief patterns disposed on the surface of the tire and correspond to recessed patterns formed on the molding surface. Usually, the vulcanization molds are made of metal with a very good surface finish appearance. But the resulting outer surface, smooth and black, has the effect of returning the light. [0003] WO2007 / 045425 describes particular types of textures with high contrast on the tire. These textures have the main effect of trapping the incident light and, by absorption of light, to give a black and matt aspect to a portion of the tire. This absorption of light makes it possible to obtain a more intense black color and forming a better contrast with the rest of the surface of the tire. The contrast is even more important when the texture rubs against glossy surfaces on the tire. The contrast obtained by this absorption of light produces a noticeable visual effect on the finish of the product, often related to the visual appearance of velvet. However, obtaining textures producing such an effect is still a technological challenge that is only partially solved. Indeed, the current methods are relatively expensive and tedious to implement, and can produce only certain types of patterns, in some places, generally easy to access. The patent application WO 2010/076502 proposes a tire mold lining assembly comprising a skin. The skin is delimited by a first and a second opposite surface, the first surface being intended to be in contact with a support block of a tire mold, and a plurality of lining elements projecting from the second surface of the skin. , these elements being intended to form sculptures of a portion of a radially outer surface of a tire. Such an assembly makes it possible to obtain conventional sculptures such as those of the tread of conventional tires. There is now a need for solutions to produce tires with intense black textures with great flexibility and advantageous costs. To overcome these disadvantages, the invention provides different technical means. SUMMARY OF THE INVENTION [0008] Firstly, a first object of the invention is to provide a molding system or mold element allowing use on a large variety of tires, and making it possible to produce different types of patterns or textures. Another object of the invention is to provide a molding system or mold element that can be obtained at costs and following competitive production times. Yet another object of the invention is to provide a molding system or mold element for disposing of patterns without restriction of positioning in the mold, making it possible to obtain on the tire particular textures on the surface of the tread, for example a pile-like texture, or a particular graphic marking. Still another object of the invention is to provide a molding system or mold member for changing easily and quickly the configuration of a mold to produce a tire with one or more different textures. To do this, the invention provides a mold member to be reported in a mold for the vulcanization of tires. The mold member has a pattern comprising a plurality of recessed or protruding members integral with said mold member. Such a mold element provides a very high flexibility for the configuration and evolution of the molds, while allowing the reuse of the same sectors. [0014] Advantageously, this mold element is shaped as a mold pattern such as a cord, lamella, or plurality of cords and / or lamellae. Such an architecture makes it possible to mold the tire texture in a groove (corresponding to the bead of the wafer) or an incision (corresponding to a wafer of the wafer) and provides an additional aesthetic appearance, for example a depth effect. According to an advantageous embodiment, the depth of the hollow elements is less than or equal to 30% of the thickness of the mold element or the height of the protuberances is less than or equal to 30% of the thickness. of the mold element, and more preferably, the depth of the patterns is less than or equal to 15% of the thickness of the mold element or the height of the protuberances is less than or equal to 15% of the thickness of the mold element. According to an advantageous embodiment, all or part of the pattern is formed by conical cavities distributed in the pattern according to a density at least equal to a conical cavity per square millimeter (mm 2), each conical cavity having an average cross section. between 0.0005 mm2 and 1 mm2. Alternatively, all or part of the pattern is formed by striations substantially parallel to each other, the pitch of the streaks in the pattern being at most equal to 0.5 mm, each streak having an average width of between 0.02. mm and 0.5 mm. According to another variant, all or part of the pattern forms recessed side parallelepipeds (C) of between 0.05 mm and 0.5 mm, of height (Hp) between 0.05 mm and 0. , 5 mm, the distance between two adjacent parallelepipeds in the texture being between 0.05 mm and 0.5 mm. [0019] Advantageously, the insert comprises elements allowing attachment, for example by gluing, screwing or mechanical anchoring, removable or not. Disassembly is advantageously useful to allow the cleaning of the sculpture in case of fouling or to change the insert. According to an advantageous embodiment, the thickness of the mold element is advantageously between 0.25 and 10 mm (or even more), and more preferably between 0.25 and 6 mm. The addition of protruding patterns stiffens the insert. The recessed patterns do not weaken the insert because of their very small relative thickness. According to another advantageous embodiment, the protruding elements form strands, said strands being distributed in the pattern according to a density of at least one strand per square millimeter (mm 2). each strand having an average section S of between 0.0005 mm 2 and 1 mm 2. Alternatively the protruding elements form parallel blades 5 between them, the pitch of the blades in the pattern being at most equal to 0.5 mm, each blade having an average width of between 0.02 mm and 0.5 mm. According to yet another variant, all or part of the hollow patterns form side parallelepipeds (C) of between 0.05 mm and 0.5 mm, of height 10 (Hp) between 0.05 mm and 0, 5 mm, the distance between two adjacent parallelepipeds in the texture being between 0.05 mm and 0.5 mm. According to another advantageous embodiment, the hollow elements or protuberance have shapes and variable distances between them. According to yet another advantageous embodiment, the protruding elements form cones on the surface of the mold and the texture comprises a plurality of cones, said cones being distributed in the texture in a density at least equal to a cone. per square millimeter (mm 2), these cones 20 having on the surface of the mold equivalent diameters (Dt) of between 0.03 mm and 1.2 mm. The mold element according to the invention may be configured for molding a tire sidewall area, or for molding a tire tread area. Advantageously, the mold element is made by laser sintering. The implementation is planned so that the inserts comprise a texture, also manufactured not laser sintering. Thus, the mold elements, including the textures, are advantageously made by laser sintering, this method of manufacture providing the advantage of allowing the shaping of very fine and / or very complex textures, as described in what follows. follows. P10-3377-EN - 6 - [0029] The inserts are advantageously intended to be reported in a lining, mainly aluminum. The invention also provides a sector mold for the vulcanization of tires, each sector comprising a solid support block and a set of lining attached to the support block, provided with at least one support surface, the sector mold comprising at least one mold element as previously described, attached to the support surface of the packing assembly.
    [0002] DESCRIPTION OF THE FIGURES [0031] All the details of embodiment are given in the description which follows, supplemented by FIGS. 1 to 8, presented solely for purposes of non-limiting examples, and in which: FIG. 1 is a view in perspective of a first example of mold elements reported on a support block of a mold according to the invention; FIG. 2a is a perspective view of an example of mold elements according to the invention before attachment to a sector; FIG 2b is a perspective view of another example of mold element according to the invention before attachment to a sector, with three views in side section to illustrate examples of fastening means of the element of mold on a support; FIG. 3 shows a mold element comprising a pattern formed of grooves in the mold; FIG. 4 shows a mold element in which the streaks of the pattern have a pyramidal type section; FIG. 5 represents a pattern comprising a plurality of holes; Figure 6 is an enlarged view of the pattern of Figure 5; - Figure 7 shows a mold member having a pattern formed of protruding strands on the mold; P10-3377-EN - 7 - - Figure 8 shows a mold element having a pattern of blades. DETAILED DESCRIPTION OF THE INVENTION "Pattern" on a mold means an organized arrangement of a plurality of elements (streaks, holes, strands, blades), all or part of these elements being the repetition of the same basic element, the pattern on the mold for obtaining a particular texture on a tire. In the description which follows, substantially identical or similar elements will be designated by identical references. [0034] FIG. 1 illustrates a sector 10 of a sector mold (not shown) for the vulcanization of tires. This sector 10 comprises a set 14 of packing advantageously made of aluminum alloy and comprising in particular a plurality of support surfaces 16 intended to receive mold elements 18. A mold element 18 comprises first 20 and second 22 opposite surfaces, the first surface 20 being intended to be in contact with the support surface 16 of the sector. The mold member 18 may comprise one or a plurality of trim members 24 projecting from the second surface 22. These trim members 24 are intended to form the tread portions of a tread portion of the tire to be molded. . Among the elements 24 of gaskets, the assembly 14 comprises in particular slats 26 intended to form circumferential slots in the tread of the tire, or circumferential cords 28 intended to form a longitudinal groove on the tread of the tire. The various cords 28 are connected by axial strips 29 so as to form a network 30 of elements 24 of packing. The thickness of each insert is between 0.25 and 10 millimeters or even more, and the various elements 24 of packing are integrally formed with the insert 18. In other words, each insert 18, including the textures 30, is made in one piece. To achieve such an insert 18 is advantageously by selective laser sintering of a metal powder. During the manufacture of the insert, it is ensured that the shape of the first surface 20 is complementary to the shape of the support surface 16 of the support block so that the insert 18 can cooperate properly with the element of filling. On the other hand, the shape of the different elements 24 of lining provided on each insert can be any and is defined according to the type of sculpture that one wishes to obtain on the tire to be molded. Thus, one can design different types of inserts 18 whose 24 trim elements vary, each of these inserts can be positioned on the surface 16 of the same sector. This allows to be able to mold different types of tires in the same mold without having to change the sectors constituting the mold. FIG. 2a illustrates some embodiments of inserts 18 provided with textures 30 on the areas that will be visible after fixation on a sector 10. FIG. 2b shows an example of insert 18 provided with a texture. With various examples of how to attach to a support surface 16. The illustrated examples include dovetail attachment, gluing or screwing. The dovetail corresponds to an anchorage during the casting of the aluminum alloy of the packing element. In the examples such as those of FIGS. 1, 2a and 2b, the extent of the textured zones, the profiles as well as the positioning of the textured zones vary according to the embodiments, the illustrated examples only being provided. for illustrative and not limiting. In addition, the patterns may take striated forms, as shown for example in Figure 3, showing grooves 19 in the form of a slot, or in Figure 4, showing streaks 21 in the form of a pyramid. P10-3377-EN - 9 - [0041] Figure 5 illustrates the pattern according to a first non-limiting embodiment of the first embodiment. In this variant, the pattern is formed by a plurality of cavities 112. The cavities 112 are here in the form of cones which extend into the depth of the mold and open onto the mold forming circular openings 111. The cavities 112 thus have a section that decreases in the depth of the mold. It will be noted that in this variant, the openings 111 of the cavities 112 do not touch each other. The openings 111 are separated by intermediate zones 113. In addition, the openings 111 are evenly distributed over the mold so that the distance d between each opening of the pattern is generally similar. Figure 6 is an enlarged view of the pattern of Figure 5. All or part of the cavities here has at least one wall 114 which, in a sectional view, forms an angle 13 between 10 ° and 60 ° relative to at a direction Z perpendicular to the pattern. FIG. 7 illustrates an embodiment in which the pattern 30 comprises a plurality of strands 106. The strands 106 being distributed in the pattern according to a density at least equal to one strand per mm 2, each strand having an average cross section. S between 0.0005 mm2 and 1 mm2. It will be noted that the average section of each strand corresponds to the average of the sections S measured at regular intervals from the base of the strand. The strands 106 have a generally conical shape with a decreasing section in the Hb height of these strands. FIG. 8 illustrates an embodiment in which the pattern 30 comprises a plurality of blades 107 parallel to one another, the pitch of the blades 107 in the pattern 30 being at most equal to 0.5 mm, each blade 107 having a average width between 0.02 mm and 0.5 mm. It will be noted that the average width corresponds to the average of the widths I measured at regular intervals in the height HI of the blade, the height of each blade being between 0.05 and 0.5 MM. In another variant embodiment, the pattern comprises a combination of strands 106 and / or and blades 107. [0047] The invention is not limited to the examples described and represented. and various modifications can be made without departing from its scope. Thus, according to another non-limiting embodiment, the blades 107 of Figure 8 may be discontinuous. They have a flat part between them. In addition, they may have section differences between them. In addition, the blades may have curvatures or angles, especially in their length. They can also be of variable length. Thus, according to another non-limiting embodiment, the cavities 112 may have a parallelepipedal section C side between 0.05 mm and 0.5 mm, Hp height between 0.05 mm and 0.5 mm, the distance between two adjacent cavities in the texture being between 0.05 mm and 0.5 mm. Alternatively the section of the cavities may be circular, polygonal (for example hexagonal). With the square or polygonal structures, it is possible to more easily organize the openings 111 relative to each other so as to limit the area of the intermediate zones 113 between these openings. With such forms of openings, it is possible to arrive more easily at substantial rates of occupation of the openings on the mold. In the case where the inserts are removable, to adapt a mold to the manufacture of a new type of tire, simply remove the inserts carried by the support blocks that correspond to the old type of tire manufactured, then to report, advantageously in a single operation, the new inserts 18 on the corresponding surfaces 16 of the sector. In the case where the sectors of a mold are made by casting aluminum, the inserts according to the invention are advantageously anchored during casting in a plaster mold or a steel matrix. However, it is also possible to provide a fixing by gluing or screwing or in a lining of aluminum or other alloy. In the first case, the inserts are not removable, while in the second case, the inserts can be disassembled, either to allow their replacement or cleaning or other. The invention has been described in connection with a sector-type mold. It can also be implemented in connection with a mold of another type. P10-3377-EN
    权利要求:
    Claims (14)
    [0001]
    REVENDICATIONS1. Mold element (18) to be attached in a mold (10) for tire vulcanization, characterized in that the mold element (30) has a pattern (30) comprising a plurality of hollow elements (19). , 21, 112) or protrusion (106, 107) integral with said mold member (18).
    [0002]
    2. mold element according to claim 1, the mold member (18) being shaped mold pattern such as a cord, lamella, or plurality of cords and / or lamellae.
    [0003]
    3. mold element (18) according to one of claims 1 or 2, wherein the depth of the recessed elements is less than or equal to 30% of the thickness of the mold element or the height of the protuberances is' less than or equal to 30% of the thickness of the mold element.
    [0004]
    A mold element (18) according to any one of claims 1 or 2, wherein the depth of the patterns (30) is less than or equal to 15% of the thickness of the mold member or the height of the protuberances is less than or equal to 15% of the thickness of the mold member.
    [0005]
    5. mold element (18) according to any one of claims 1 to 4, characterized in that all or part of the pattern is formed by conical cavities distributed in the pattern (30) in a density at least equal to a cavity conical per square millimeter (mm 2), each conical cavity having a mean section of between 0.0005 mm 2 and 1 mm 2.
    [0006]
    6. Mold element (18) according to any one of claims 1 to 4, characterized in that all or part of the pattern is formed by striations substantially parallel to each other, the pitch of the streaks in the pattern (30) being at more equal to 0.5 mm, each streak having an average width of between 0.02 mm and 0.5 mm.
    [0007]
    7. Mold element (18) according to any one of claims 1 to 4, characterized in that all or part of the pattern forms parallelepipeds P10-3377-FR-13- side (C) between 0, 05 mm and 0.5 mm, height (Hp) between 0.05 mm and 0.5 mm, the distance between two adjacent parallelepipeds in the texture being between 0.05 mm and 0.5 mm.
    [0008]
    8. Mold element (18) according to any one of claims 1 to 4, characterized in that the protruding elements form strands, said strands being distributed in the pattern (30) in a density at least equal to one strand per square millimeter (mm 2), each strand having an average section S of between 0.0005 mm 2 and 1 mm 2.
    [0009]
    9. Mold element according to any one of claims 1 to 4, characterized in that the protruding elements form blades parallel to each other, the pitch of the blades in the pattern being at most equal to 0.5 mm, each blade having an average width of between 0.02 mm and 0.5 mm.
    [0010]
    10. Mold element (18) according to any one of claims 1 to 9, characterized in that the hollow elements or protuberance have shapes and distances variable between them.
    [0011]
    Mold element (18) according to any one of claims 1 to 10, configured for molding a tire sidewall area.
    [0012]
    Mold element (18) according to any one of claims 1 to 10, configured for molding a tire tread area.
    [0013]
    13. mold element (18) according to any one of the preceding claims, produced by laser sintering.
    [0014]
    14. A sector mold for vulcanizing tires, each sector (10) comprising a solid support block and a set of lining attached to the support block, provided with at least one support surface (16), the sector mold comprising at least one mold element (18) according to one of claims 1 to 13, attached to the support surface (16) of the lining assembly. P10-3377-EN
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    同族专利:
    公开号 | 公开日
    CN106470826A|2017-03-01|
    FR3022831B1|2017-03-03|
    CN106470826B|2019-12-31|
    EP3160722A1|2017-05-03|
    EP3160722B1|2019-12-04|
    WO2016001732A1|2016-01-07|
    US9987811B2|2018-06-05|
    US20170157870A1|2017-06-08|
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    法律状态:
    2015-06-19| PLFP| Fee payment|Year of fee payment: 2 |
    2016-01-01| PLSC| Search report ready|Effective date: 20160101 |
    2016-06-27| PLFP| Fee payment|Year of fee payment: 3 |
    2017-06-21| PLFP| Fee payment|Year of fee payment: 4 |
    2018-06-20| PLFP| Fee payment|Year of fee payment: 5 |
    2020-03-13| ST| Notification of lapse|Effective date: 20200206 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1401467A|FR3022831B1|2014-06-30|2014-06-30|PNEUMATIC MOLD INSERT HAVING HIGH CONTRAST TEXTURE|FR1401467A| FR3022831B1|2014-06-30|2014-06-30|PNEUMATIC MOLD INSERT HAVING HIGH CONTRAST TEXTURE|
    PCT/IB2015/001067| WO2016001732A1|2014-06-30|2015-06-28|Mould insert comprising a high-contrast texture|
    US15/322,562| US9987811B2|2014-06-30|2015-06-28|Mould insert comprising a high-contrast texture|
    CN201580035885.1A| CN106470826B|2014-06-30|2015-06-28|Mold insert including high contrast texture|
    EP15742060.5A| EP3160722B1|2014-06-30|2015-06-28|Mould insert having a high-contrast textured surface|
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