• 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 invention relates to a mold element (2) for a tire mold comprising a marking (20), said mold comprising a shell for molding the sidewall (10) of the tire (1). It is characterized in that said mold element (2) is a removable plate intended to be mounted in a housing of said shell, and in that said marking (20) is intended to mold on said tire a coded matrix symbol making contrast with the sidewall of the tire, said marking (20) having a first set of cavities (201) or protuberances (202) adapted to mold dark portions of the coded matrix symbol (5).
    公开号:FR3020593A1
    申请号:FR1453986
    申请日:2014-04-30
    公开日:2015-11-06
    发明作者:Olivier Muhlhoff；Jean Claude Desvignes
    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 present invention relates to a mold element for a tire mold comprising a marking, said mold comprising a shell intended to mold the sidewall of the tire. DESCRIPTION OF THE PREFERRED EMBODIMENT [02] It also relates to a tire mold in which is mounted said mold member. [03] Finally, it relates to a method of manufacturing said mold member for a tire mold. STATE OF THE ART [04] It is known from EP1636117 to use a matrix symbol coded on the sidewall of a tire, said encoded matrix symbol comprising information such as an individual serial number for said tire, the website tire manufacturer, etc. A coded matrix symbol has dark parts and clear parts and is engraved directly on the sidewall of the tire, after the latter has gone through all the manufacturing phases and by all the conformity tests. After manufacture, each tire is placed on a dedicated coded matrix symbol production line which performs various steps including in particular the positioning of the tire on the manufacturing line, the reading of a position reference on the tire, the alignment of the tire. pneumatic with a laser according to the position reference, the laser engraved marking of the coded matrix symbol. A disadvantage of this state of the art lies in the fact that the dedicated laser engraving production line is complex to implement and also expensive. Moreover, when the tire wears out, the coded matrix symbol becomes less readable. [06] There is today a need to improve the readability of the coded matrix symbols present on the sidewalls of a tire in order to improve their reading while rendering more efficient the manufacturing of the marking of said coded matrix symbols.
    [0002] DEFINITIONS [7] "Pneumatic" means all types of elastic bandages subjected to internal pressure or not. [8] "Rubber material" means a diene elastomer, that is, in a known manner, an elastomer derived from at least a part (i.e., homopolymer or copolymer) of monomers dienes (monomers carrying two carbon-carbon double bonds, conjugated or not). [9] By "encoded matrix symbol" is meant an "intelligent" code where the data is encoded in two dimensions (in the form of a plurality of rows and columns), the data being decodable by an image imager. a machine, such as a mobile phone. An encoded matrix symbol encodes a much larger volume of data for a given given surface than a traditional linear bar code and has an integrated error correction system. [10] The term "tread" of a tire means a quantity of rubber material delimited by lateral surfaces and by two main surfaces, one of which, called a tread surface, is intended to come into contact with a tire. when the tire is rolling. [11] "Sidewall" of a tire means a side surface of the tire disposed between the tread of the tire and a bead of the tire. [12] "Texture" means an organized arrangement of a plurality of elements, all or part of the elements of the arrangement being the repetition of the same basic element, for example, a strand or a lamella. [13] "Strand" means a filamentary element whose height is at least equal to twice the diameter of a disk of the same surface as the mean section of the strand. [14] "Slats" means elongated strands having a length at least twice their height. [15] "Textured material with a sidewall" means that the texture is in the same rubber material as the sidewall of the tire. This gives a texture without adding another material. SUMMARY OF THE INVENTION [16] The invention relates to a mold member for tire mold having a marking, said mold having a shell for molding the sidewall of the tire. Said mold element is a removable plate intended to be mounted in a housing of said shell, and said marking is intended to mold on said tire a coded matrix symbol in contrast with the sidewall of the tire, said marking comprising a first set of cavities or of protuberances adapted to mold dark portions of the encoded matrix symbol. [17] Thus, the realization of the marking on a mold member will allow to produce a symbol symbol encoded on the sidewall of the tire during the manufacture of said tire. It is no longer necessary to have a dedicated production line. Furthermore, the marking makes it possible to produce a coded matrix symbol comprising the dark portions of the matrix symbol encoded in strong contrast with the remainder of the sidewall of the tire and also with respect to the clear portions of said symbol. The reading of the coded matrix symbol is thus improved. [18] According to non-limiting embodiments, the tire may further comprise one or more additional characteristics from the following. [19] In one nonlimiting embodiment, the marking comprises a second set of protuberances protruding from said mold member adapted to mold clear portions of the coded matrix symbol and said protuberances are in the form of spherical caps, each protuberant element being interpenetrated with several adjacent protruding elements. [20] This makes it possible to produce hollow elements with respect to the surface of the sidewall. [21] In a non-limiting embodiment, the marking comprises a set of recesses adapted to mold clear portions of the coded matrix symbol and said recesses are in the form of spherical caps. [22] This makes it possible to produce hump elements with respect to the surface of the sidewall. [23] In a non-limiting embodiment, said mold member includes a second set of cavities adapted to mold a bounding area of the encoded matrix symbol. [24] This makes it possible to produce a texture zone made of material with the sidewall and in contrast with the rest of the tire. [25] In a non-limiting embodiment, the cavities of the first set of cavities are conically shaped and are distributed in the marking at a density of at least one cone per square millimeter (mm 2), each cone having a cross section. average between 0.0005 mm2 and 1 mm2. [26] This allows for elements protruding from the sidewall surface that have a strand shape. [27] In a non-limiting embodiment, the cavities of the first set of cavities have a shape of grooves substantially parallel to each other, the pitch of the grooves being at most equal to 0.5 mm, each streak having an average width of between 0.02 mm and 0.25 mm. [28] This allows for elements protruding from the sidewall surface that have a lamella shape. [29] In a non-limiting embodiment, the cavities of the first set of cavities have a parallelepipedal shape of between 0.05 mm and 0.5 mm, with a depth of between 0.05 mm and 0.5 mm. mm, the distance between two adjacent cavities in the marking being between 0.05 mm and 0.5 mm. [30] This allows for protruding elements that have a parallelepiped shape. [31] In a nonlimiting embodiment, the protuberances of the first set of protuberances have a conical shape and are distributed in the marking 5 in a density at least equal to one protuberance per square millimeter (mm 2), these protuberances having diameters equivalent between 0.01 mm and 1.2 mm. [32] This makes it possible to produce hollow elements with respect to the surface of the sidewall. [33] It is also proposed a tire mold having a shell for molding the sidewall of the tire, said shell having a housing in which is mounted a mold member according to any one of the preceding features. [34] There is also provided a method of manufacturing a mold member for a tire mold, said mold having a shell for molding the sidewall of the tire, said mold member being a removable wafer to be mounted in a mold. housing said shell and having a marking, said method comprising: - extracting said mold member from an aluminum plate; the realization of the marking intended to mold on the tire an encoded matrix symbol in contrast with the sidewall of the tire, said coded matrix symbol comprising dark parts and clear parts, the embodiment of said marking comprising: the embodiment of the marking adapted for molding the clear portions of the matrix symbol encoded in said mold member; and - performing the marking adapted to mold the dark portions of the matrix symbol encoded in said mold member. [35] In a non-limiting embodiment, the steps of making the marking adapted to mold the clear portions and the dark portions of the matrix symbol encoded in said mold member are simultaneously performed by stamping said mold member. [36] In a non-limiting embodiment, the marking is made to mold the clear portions of the matrix symbol encoded in said mold member prior to the extraction of said mold member from the aluminum plate. [37] In a non-limiting embodiment, the marking adapted to mold the clear parts of the coded matrix symbol is made: by a surface treatment of said mold element so that the surface of said mold element corresponds to said clear parts; or by microbeading a second set of protuberances protruding from said mold member to form the marking of the coded matrix symbol such that said protuberances are in the form of spherical caps, each protruding element being interpenetrated in the marking with a plurality of adjacent protruding elements, the second set of protuberances being adapted to mold said clear portions of the coded matrix symbol; or - by molding a set of hollow shaped spherical cap, said set of recesses being adapted to mold said clear portions of the coded matrix symbol. [38] In a non-limiting embodiment, the microbead makes microbeads of diameter between 101.1m and 2001.1m. [39] In a non-limiting embodiment, performing the marking adapted to mold the dark portions of the matrix symbol encoded in said mold member is accomplished by providing a first set of cavities or protuberances in said mold member adapted for molding said dark portions of the encoded matrix symbol, making the first set of cavities in said mold member by laser etching and making the first set of protuberances in said mold member being made by molding. BRIEF DESCRIPTION OF THE DRAWINGS [40] Other characteristics and advantages of the invention will emerge from the following description, given by way of example, without limitation, with reference to the appended drawings, in which: FIG. radial of a mold comprising a mold element according to the invention according to a non-limiting embodiment; FIG. 2 diagrammatically represents a perspective view of the mold element of FIG. 1 including a marking corresponding to the negative of a coded matrix symbol according to a nonlimiting embodiment; - Figure 3 schematically shows a perspective view of a portion of a tire having a side in which is disposed a coded matrix symbol made by means of the mold member of Figure 2; FIG. 4 represents an encoded matrix symbol of the sidewall of FIG. 3 according to a nonlimiting embodiment, the coded matrix symbol comprising dark parts and light parts, the dark parts being composed of a particular texture; FIG. 5 represents the encoded matrix symbol of the flank of FIG. 4 surrounded by a delimitation zone; FIG. 6 represents a sectional view of a portion of the mold element of FIG. 1 which makes it possible to mold dark portions of a coded matrix symbol according to a first nonlimiting embodiment; FIG. 7 represents a sectional view of a portion of the mold element of FIG. 1, which makes it possible to mold dark portions of a coded matrix symbol according to a second nonlimiting embodiment; Fig. 8 shows a portion of the texture composing dark portions of a coded matrix symbol obtained by the mold member of Fig. 6; Fig. 9 shows a portion of the texture composing dark portions of the encoded matrix symbol obtained by the mold member of Fig. 6; FIG. 10 represents a sectional view of a portion of the mold element of FIG. 1 which makes it possible to mold dark portions of a coded matrix symbol according to a third non-limiting embodiment; Fig. 11 shows a portion of the texture composing dark portions of the encoded matrix symbol obtained by the mold member of Fig. 10; FIG. 12 represents a sectional view of a portion of the mold element of FIG. 1 which makes it possible to mold dark portions of a coded matrix symbol according to a fourth nonlimiting embodiment; Fig. 13 shows a portion of the texture composing dark portions of the encoded matrix symbol obtained by the mold member of Fig. 12; FIG. 14 represents a sectional view of a portion of the mold element of FIG. 1 which makes it possible to mold clear portions of a coded matrix symbol according to a first nonlimiting embodiment; FIG. 15 is a perspective representation of a plurality of hollow elements of a pattern constituting clear portions of the encoded matrix symbol obtained by the mold member of FIG. 14; FIG. 16 represents a sectional view of a portion of the mold element of FIG. 1 which makes it possible to mold clear portions of a coded matrix symbol according to a second nonlimiting embodiment; FIG. 17 is a perspective representation of a plurality of hollow elements of a pattern constituting clear portions of the encoded matrix symbol obtained by the mold member of FIG. 16; FIG. 18 is a flowchart of a method for manufacturing a mold element of FIGS. 6, 7, 10, 12, 14, 16 according to a nonlimiting embodiment. [41] In the following description, FIGS. substantially identical or similar elements will be designated by identical references. [42] Figure 1 illustrates a mold 3 comprising: - a shell 4 for molding the sidewall 10 of a tire 1, said shell having a housing 40 in which is mounted a mold member 2; a sector 30 kept closed by a conical ring 31; - A mold element 2 having a marking 20. [43] The mold element 2 is a removable plate intended to be mounted in the housing 40 of the shell 4. In a non-limiting embodiment, said plate 2 is in position. aluminum. This makes it possible to have a ductile removable plate and this thus facilitates the realization of the marking in the plate 2. The marking 20 is intended to mold on the tire an encoded matrix symbol 5 which contrasts with the sidewall of the tire. Marking 20 therefore corresponds to the negative of the coded matrix symbol 5 to be written on the tire. [44] Figure 2 illustrates a non-limiting example of a mold element 2 having such a marking 20. Note that the removable plate 2 is slightly curved so as to match the shape of the mold 3. As a result the coded matrix symbol 5 which results will follow the curvature C1 of the sidewall of the tire 1, said curvature Cl (illustrated in Figure 3) being defined in a parallel with respect to the axis of rotation of the tire. In other words, the coded matrix symbol 5 will be bent around the axis of rotation of the tire 1. This will give a more aesthetic appearance to the tire since the coded symbol 5 will appear as an integral part of the sidewall 10. Moreover, in a non-limiting embodiment, the marking 20 is rectangular and oriented in the direction of the wafer 2 as shown in Figure 2. The coded matrix symbol 5 resulting therefrom will be rectangular in shape. [45] As illustrated in FIG. 2, the marking 20 comprises a first set of cavities 201 or protuberances 202 adapted to mold the dark portions 50 of the coded matrix symbol 5. Furthermore, the marking 20 comprises a second set of protuberances 203 projecting from said plate 2 and adapted to mold them to clear portions 51 of the coded matrix symbol 5. [46] Figure 3 illustrates the sidewall 10 of a tire 1, said sidewall 10 comprising a coded matrix symbol 5 obtained with the aid of the marking 20 of the mold element 2. [47] Note that in non-limiting embodiments, the coded symbol 30 is selected from the following symbols: a datamatrixTM; - a QRTM - a QR codeTM; - a MaxiCodeTM; - a PDF-417TM; - a 16KTM code; - a 49TM code; - an AztecTM code, or any other coded matrix symbol. It will be recalled that a coded matrix symbol 5 makes it possible to encode information such as the manufacturer's mark, the manufacturer's website, etc. Thanks to reading / decoding means such as an imager incorporated in a non-limiting example in a mobile phone, an observer of the tire will be able to read and decode the coded symbol 5 and access the website of the manufacturer, for example to order a new tire. [48] In FIG. 4 is shown a first non-limiting embodiment of a coded matrix symbol 5. As can be seen in the figure, the coded symbol 5 comprises dark portions 50 and clear portions 51. In a known manner those skilled in the art, in a non-limiting embodiment, the dark portions 50 and clear 51 are dark boxes, respectively light boxes, a portion corresponding to a box. The encoded matrix symbol 5 thus comprises columns and rows of boxes (or squares). In a non-limiting embodiment, a box has a size between 0.5x0.5mm to 2x2mm. Beyond this, the encoded matrix symbol 5 becomes too intrusive or is much too miniaturized and therefore too fragile to be decoded at the end of wear of the tire 1. In a non-limiting embodiment variant, a box has a size of 1x lmm. In another non-limiting embodiment, the dark 50 and clear portions 51 are dark circles, respectively light circles. In another non-limiting embodiment, one can have a combination of boxes and circles. [49] The dark portions 50 are composed of a texture integral with said sidewall 10. The texture contrasts with the rest of the tire 1 and in particular the remainder of the sidewall 10 of the tire 1 so that the code symbol coded 5 is clearly visible on the sidewall 10 by an observer of the tire. FIG. 5 is a second non-limiting embodiment of a coded matrix symbol 5. As can be seen in the figure, in addition to the dark portions 50 and the light portions 51, the encoded symbol 5 is surrounded by a texture zone (or delimitation) 52 made of material with the sidewall and in contrast with the rest of the tire 1. In a non-limiting embodiment, this zone 52 is at least 2mm wide Ld. This delimitation zone 52 does not touch the dark areas 50 of the coded matrix symbol 4. It is composed of the same "velvet" type texture (described in the following description) as the dark parts 50, so that the quantity black area in the shooting area around the coded matrix symbol 5 is increased. Thus, thus increasing the amount of black surface, the contrast between the light and dark regions of the matrix symbol 5 in the processing performed by the mobile phone is increased. The reading / decoding of the symbol 5 is therefore improved. 1521 The dark parts 50, the light parts 51 and the bounding area 52 of the coded symbol 5 are produced by means of the mold element 2 in 20 different modes. nonlimiting embodiments presented in the following description. The dark portions 50 of the encoded matrix symbol 4 are made in the following manner. As previously explained, the marking 20 of the removable wafer 2 includes a first set of cavities 201 or protuberances 202 adapted to mold the dark portions 50 of the coded matrix symbol 5. 1551 The first set of cavities 201 has different shapes presented herein. -after, to realize the dark parts 50 according to different forms. 1561 The cavities 201 correspond to the negative of the dark portions 50. In other words, a plurality of cavities 201 corresponds to the negative of a dark box 50. As shown in FIG. 6, in a first non-limiting embodiment, the cavities of the first set of cavities 201 have a conical shape and are distributed in the marking 20 in a density at least equal to one cone per square millimeter mm 2, each cone 201 having a mean section Sc of between 0.0005 mm 2 and 1 mm 2. [58] This makes it possible to produce a texture forming the dark portions 50 which has a plurality of protruding elements with respect to the surface of the flank 10 which are in the form of strands 110 as illustrated in FIG. 8. In this figure , the strands 110 have a generally conical shape with a section decreasing in the height Hb of these strands.
    [0003] More particularly, the average section of each strand, corresponding to the average of sections S measured at regular intervals from the base of the strand, is between 0.0005 mm 2 and 1 mm 2. In the texture, the strands are distributed at a density of at least one strand per square millimeter. [59] As illustrated in FIG. 6 also, in a second nonlimiting embodiment, the cavities of the first set of cavities 201 have a shape of striations substantially parallel to each other, the pitch Pi of the streaks being at least equal to 0.05 mm and at most equal to 0.5 mm, each streak 201 having an average width of between 0.02 mm and 0.25 mm. [60] This allows for a dark-part texture 50 which has a plurality of protruding elements with respect to the flank surface 10 which are slat-shaped 111 as shown in Fig. 9. In this figure , the lamellae 111 have a generally triangular section and the average width of each lamella, corresponding to the average widths 1 measured at regular intervals in the height HI of the lamella, is between 0.02 mm and 0.25 mm. In the texture, the lamellae 111 are substantially parallel to each other and the pitch P of the lamellae is at least equal to 0.05 mm and at most equal to 0.5 mm. [61] In another embodiment, the cavities of the first set of cavities 201 have a combination of cones and ridges so as to provide a dark-part texture 50 which has a combination of strands 110 and lamellae 111. [62] As illustrated in Figure 7, in a non-limiting embodiment, the mold element 2 comprises a second set of cavities 205 adapted to mold the delimiting zone 52 of the coded matrix symbol 5, zone 52 described. previously. [63] As illustrated in FIG. 10, in a third nonlimiting embodiment, the cavities of the first set of cavities 201 have a parallelepipedal shape with a Cp side of between 0.05 mm and 0.5 mm, H depth between 0.05 mm and 0.5 mm, the distance D between two adjacent cavities in the marking 20 is between 0.05 mm and 0.5 mm. [64] This makes it possible to produce a texture forming the dark portions 50 which comprises a plurality of protruding elements with respect to the surface of the sidewall 10 which are in the form of parallelepipeds 112 as illustrated in FIG. , the parallelepipeds 112 have a side C between 0.05 mm and 0.5 mm, a height Hp between 0.05 mm and 0.5 mm, and a distance Dp between two adjacent parallelepipeds 112 in the texture between 0 , 05 mm and 0.5 mm. [65] In another embodiment, the cavities of the first set of cavities 201 have a combination of cones, striae and parallelepipeds, or striations and parallelepipeds or cones and parallelepipeds described above. [66] In a fourth nonlimiting embodiment not illustrated, the cavities of the first set of cavities 201 have shapes and distances between variable cavities. This allows for protruding elements of variable shapes. This creates randomness in the texture forming the dark portions 50, which makes these elements less visible. [67] These protruding elements 110 to 112 form the material texture integral with the sidewall 10 and are therefore of rubbery material. In other words, a dark box 50 has a plurality of elements 110, 111 and / or 112. The effect of the protruding elements 110 to 112 is to "trap" a large amount of incident light rays that meet the texture. The texture (called "velvet") provides a "velvet" type of visual because the protruding elements absorb the light and thus make the dark portions 51 of the blacker coded matrix symbol 5 black. An observer of the tire will distinguish well these dark parts 50 with respect to the clear parts 51 and the rest of the sidewall 10. Moreover, the texture is of the "velvet" type because it is pleasant to the touch. [68] After the first set of cavities 201, the first set of protuberances 202 of the marking 20 is presented below according to a non-limiting embodiment as illustrated in FIG. 12. The marking 20 comprises a plurality of protuberances 202 projecting from the mold member 2 and the intermediate portions 202 'separating the protuberances 202. The protuberances 202 have a conical shape and are distributed in the marking 20 in a density at least equal to one protuberance per square millimeter (mm 2 ), these protuberances 202 having a base Bc having a generally circular shape and having an equivalent diameter Dc of between 0.01 mm and 1.2 mm. The density of the protuberances and / or the equivalent diameter Dc are selected so that the protrusions 202 occupy a certain percentage of the marking 20. In a nonlimiting example, the protuberances 202 occupy at least 30% of the marking 20. According to FIG. other non-limiting embodiments, the protuberances 202 occupy 50% or even more than 70% of the marking 20. [69] Moreover, in a non-limiting embodiment, the protuberances 202 have a height Hc of at least 0.1 mm . In a non-limiting embodiment, the height Hc is between 0.2 mm and 0.6 mm. [70] The protruding elements 202 correspond to the negative of the dark portions 50. In other words, a plurality of protruding elements 202 corresponds to the negative of a dark box 50. [71] The protuberance elements 202 make it possible to produce a texture forming the dark portions 50 which has first recessed elements 113 (also called 25 holes) as illustrated in FIG. 13. [72] The recessed elements 113 are composed of openings 114 on the surface of the sidewall 10 and associated cavities 115 extending in the depth of the surface of the flank 10. The openings 114 extend into the depth of the surface of the flank 10 to form cavities 115. [73] The cavities 115 are cone-shaped and have section which decreases in the depth of the surface of the sidewall 10. In this way, the contrast of the texture and therefore of the coded matrix symbol 5 is improved with respect to the remainder of the tire 1 and more particularly by In this variant, the openings 114 of the cavities 115 do not touch each other. The openings 114 are separated by intermediate zones 116. In addition, the openings 114 are evenly distributed in the texture so that the distance d between each opening of the texture is generally similar. It should be noted that the higher the degree of occupation of the apertures on the texture, the better is the contrast quality of this texture and therefore the dark portions 50 of the coded matrix symbol 4 with respect to the clear portions 51 and to the remainder of the sidewall 10. [74] The effect of these cavities 115 is to "trap" a large quantity of the incident light rays that meet the texture, but also to offer a greater durability of the texture. Indeed, as the cavities 115 are recessed in the surface of the sidewall 10, the impact of mechanical aggression on the texture, such as friction of a roadway is lower than for protuberances. In this embodiment, the texture (called "velvet") makes it possible to obtain a "velvet" type of visual because the cavities absorb the light and thus make the dark portions 50 of the coded matrix symbol 5 blacker. [75] After describing the making of the dark portions 50 of the coded symbol 5, the remainder of the description describes the making of the light portions 51 of the coded symbol 5. [76] In a first non-limiting embodiment, the The mold element 2 in itself makes it possible to make the light parts 51. In fact, in this case, the clear parts 51 are composed of a part of the surface of the blank 10 that has not been covered by the blank. "velvet" type texture described above, part of the surface of the sidewall delimited by the space occupied by the coded matrix symbol 5. Indeed, the surface of the sidewall 10 is smooth and reflects the light. An observer of the tire will perceive a gray-white color. Thus, the light portions 51 will contrast with the dark portions 50 previously described. [77] In a second nonlimiting embodiment illustrated in FIG. 14, the marking 20 comprises a second set of protuberances 203 projecting from said mold element 2 and adapted to mold the clear portions 51 of the coded symbol 5 and said protuberances 203 are in the form of spherical caps, each protruding element 203 being interpenetrated with a plurality of adjacent protruding elements. Thus, these protuberances 203 correspond to the negative of the clear parts 51. In other words, a plurality of protuberances 203 corresponds to the negative of a clear box 51. [78] By "protruding element interpenetrated with other elements in adjacent protuberance", it is meant that the spherical cap formed by the protuberance element is interrupted by the other adjacent protuberance elements, so that the distance between the vertex of the spherical cap and the top of another adjacent protuberance element is less than diameter of this spherical cap. [79] The second protruding elements 203 make it possible to produce a pattern forming the clear parts 51 which has hollow elements 117 as illustrated in FIG. 15. The second hollow elements 117 all have the same shape. The shape is an open surface. The form is a part of sphere. In the nonlimiting embodiment illustrated, the second hollow elements 117 are aligned with each other. This makes it possible to clearly define the light parts 51. Each second hollow element 117 is adjacent with another second hollow element 117. In addition, the second hollow elements 411 are connected to each other at connection zones 118. In a third embodiment illustrated in Figure 16, the marking 20 includes a set of recesses 204 adapted to mold the clear portions 51 of the coded matrix symbol 5 and said recesses 204 are in the form of concave spherical caps 25. [81] Holes 204 provide a light-patterned pattern 51 which has bump elements 119 as shown in FIG. 17. Bump elements 119 all have the same shape. The shape is a closed surface. The shape is a spherical cap, also called shell or microlens. In the nonlimiting embodiment illustrated, the bump elements 119 are aligned with each other. This makes it possible to clearly delineate the clear portions 51. The geometric shape of the bump elements 119 is thus convex. Each spherical cap 119 is interpenetrated with several adjacent hump elements. [82] In a fourth nonlimiting embodiment (not shown), the marking 20 comprises a combination of second protrusion elements 203 and recesses 204 to provide a combination of recessed elements 117 and elements 119. [83] Thus, the clear portions 51 are composed of a pattern comprising: - a plurality of hollow elements 117; or - a plurality of hump elements 119; or 10 - a combination of hollow elements 117 and hump elements 119. In other words, a clear box 51 has a plurality of elements 117 and / or 119. This makes it possible to make the parts 51 that the smooth surface of the sidewall 10. The pattern is also integral with said sidewall 10. It is in the same rubber material as the sidewall of the tire. The elements 117 and 119 are thus made of rubber. [84] Thus, thanks to these second hollow elements 117/119 in the bump, the coded matrix symbol 5 has portions 51 which appear clearer to an observer of the tire 1 than the dark parts 50 and therefore distinct from these dark portions 50. This facilitates the reading / decoding of the coded matrix symbol 20. [85] In order to obtain a manufacturing method that is easy to implement, in a nonlimiting embodiment, the density of hollow elements 117 and bump elements 119 in the pattern is greater than or equal to 0.2 elements per mm 2. [86] The method of manufacturing the mold element 2 for tire mold 3 and its marking 20 is described below with reference to FIG. 18. [87] Said method P comprises: - extraction said mold member 2 from an aluminum plate (step 1 illustrated EXT E (2)); the embodiment of the marking 20 for molding on the tire 1 the coded matrix symbol 5 in contrast with the sidewall 10 of the tire 1, said coded matrix symbol 5 comprising dark portions 50 and clear parts 51, the embodiment of said marking 20 comprising - making a portion of the marking 20 adapted to mold the clear portions 51 of the coded matrix symbol 5 in said mold member 2 (step 2 illustrated MA PC (2)); and - producing a portion of the marking 20 adapted to mold the dark portions 50 of the coded matrix symbol 5 in said mold member 2 (step 3 illustrated MA PS (2)). [88] Note that one or more platelets 2 can be extracted simultaneously from an aluminum plate. Furthermore, in non-limiting embodiments, the extraction is by a stamping or trimming process. [89] In a first nonlimiting embodiment, the realization of the negative of the clear portions 51 (step 2) and the realization of the negative of the dark portions 50 (step 3) is performed sequentially. Thus, the negative (ie the second protruding elements 203 or the set of recesses 204 seen previously) of the clear portions 51, then the negative (ie the first set of cavities 201 or protuberances 202 viewed previously) dark portions 50. The light boxes 51 are thus made before the dark boxes 50. [90] In a first non-limiting embodiment, the embodiment of the marking adapted to mold the clear portions 51 of the symbol coded coding 5 in said mold member 2 is performed after extraction of said mold member 2 from an aluminum plate. [91] In a second, non-limiting, embodiment, the embodiment of the marking adapted to mold the clear portions 51 of the coded matrix symbol 5 in said mold member 2 is effected prior to the extraction of said mold member 2 from an aluminum plate. The realization is thus faster. [92] In a second nonlimiting embodiment, the steps of making the parts of the marking 20 suitable for molding the light portions 51 (step 2) and the dark portions 50 (step 3) of the coded symbol 5 in said element of mold 2 are carried out simultaneously by stamping said mold member 2. [93] This makes it possible to obtain an inexpensive manufacturing method for producing matrix symbols coded in very large numbers. [94] The embodiment of the part of the marking 20 adapted to mold the clear portions 51 of the coded symbol 5 (step 2) is carried out: by a surface treatment of said mold element 2 so that the surface of said element of mold 2 corresponds to said clear portions 51 (illustrated operation TR S (2)); or by microbeading the second set of protuberances 203 projecting from said mold element 2 to form the marking 20 of the encoded symbol 5 so that said protuberances 203 are in the form of spherical caps, each protruding element 203 being interpenetrated in the marking 20 with a plurality of adjacent protuberance elements, the second set of protrusions 203 being adapted to mold said clear portions 51 of the coded matrix symbol 5 (illustrated operation MC P (203)); or - by molding the set of depressions 204 in said mold member 2 so that said recesses 204 are in the form of spherical caps and are adapted to mold said clear portions 51 of the coded matrix symbol 5 (illustrated operation MO _C (204 )). [95] The surface treatment is carried out so that the arithmetic mean-deviation parameter Ra representative of the surface roughness of the mold element 2 is very small and is less than 30 μm. The mold element 2 thus comprises a smooth, reflective surface which regulates the average light intensity returned. The clear portions 51 will thus have a surface roughness of parameter Ra less than 30 μm. The amount of light returned is thus maximized. [96] In a non-limiting embodiment, the microbead makes microbeads of diameter between 10pm and 204m. In a non-limiting embodiment variant, the diameter is 50 μm. [97] Furthermore, the embodiment of the portion of the marking 20 adapted to mold the dark portions 50 of the coded matrix symbol 5 in said mold member 2 (step 3) 30 is performed by providing a first set of cavities 201 or protuberances 202 in said mold element 2 corresponding to the dark portions 50 of the coded symbol 5, the production of the first set of cavities 201 in said mold element 2 being carried out by laser etching (operation illustrated GR C (201)) and the embodiment the first set of protuberances 202 in said mold member 2 being made by molding (illustrated by MO P (202)). [98] The invention is not limited to the examples described and shown and various modifications can be made without departing from its scope. [99] Thus, the invention has been described with a marking 20. However, in another nonlimiting exemplary embodiment, the mold element 2 may comprise several markings 20 so as to produce several coded matrix symbols 5 on the 10 side of the tire 10. [100] Thus, according to another non-limiting embodiment, the microbeading operation can be replaced by a plastic deformation operation to form microlenses, for example by stamping, knurling, embossing, etc. [101] Thus, according to another non-limiting embodiment, the operation of engraving dark boxes 51 can be performed not by laser, but by mechanical machining or punching (plastic deformation). [102] The invention described has the following advantages in particular: - the manufacture of the coded matrix symbol 5 can be integrated during the manufacture of the tire 1 by means of an integrated mold, and not after the manufacture of the tire. The realization is thus simplified and the cost is reduced; this makes it possible to produce a composition of the coded matrix symbol 4 with a "velvet" type texture made of material with the sidewall of the tire for the dark parts 50 and with second hollow / hump elements for the clear parts 51.
    权利要求:
    Claims (15)
    [0001]
    REVENDICATIONS1. Mold element (2) for tire mold (3) having a marking (20), said mold (3) having a shell (4) for molding the sidewall (10) of the tire (1), characterized in that said mold element (2) is a removable plate intended to be mounted in a housing (40) of said shell (4), and in that said marking (20) is intended to mold on said tire (1) an encoded matrix symbol (5) in contrast with the sidewall (10) of the tire (1), said marking (20) having a first set of cavities (201) or protuberances (202) adapted to mold dark portions (50); ) of the coded matrix symbol (5).
    [0002]
    Mold element (2) according to claim 1, characterized in that the marking (20) comprises a second set of protuberances (203) projecting from said mold element (2) adapted to mold clear parts (51). ) of the coded matrix symbol (5) and in that said protuberances (203) are in the form of spherical caps, each protruding element (203) being interpenetrated (20) with a plurality of adjacent protruding elements. 20
    [0003]
    Mold element (2) according to claim 1 or claim 2, characterized in that the marking (20) comprises a set of recesses (204) adapted to mold clear portions (51) of the coded matrix symbol (5). and in that said depressions (204) have the shape of spherical caps. 25
    [0004]
    4. Mold element (2) according to any one of claims 1 to 3, characterized in that said mold element (2) comprises a second set of cavities (205) adapted to mold a delimitation zone (52) of the symbol coded matrix (5). 30
    [0005]
    5. mold element (2) according to any one of claims 1 to 4, characterized in that the cavities of the first set of cavities (201) have a formeconic and are distributed in the marking (20) in a density at least equal to one cone per square millimeter (mm2), each cone (201) having a mean section of between 0.0005 mm2 and 1 mm2.
    [0006]
    6. mold element (2) according to any one of claims 1 to 5, characterized in that the cavities of the first set of cavities (201) have a form of ridges substantially parallel to each other, the pitch of the streaks being at most equal to 0.5 mm, each streak (201) having an average width of between 0.02 mm and 0.25 mm.
    [0007]
    7. mold element (2) according to any one of claims 1 to 6, characterized in that the cavities of the first set of cavities (201) have a shape of side parallelepipeds (C) between 0.05 mm and 0.5 mm, depth (H) between 0.05 mm and 0.5 mm, the distance between two adjacent cavities in the marking (20) being between 0.05 mm and 0.5 mm.
    [0008]
    8. Mold element (2) according to any one of claims 1 to 7, characterized in that the protuberances of the first set of protuberances (202) have a conical shape and are distributed in the marking (20) in a density at less equal to one protuberance per square millimeter (mm 2), these protuberances having equivalent diameters of between 0.01 mm and 1.2 mm.
    [0009]
    9. Mold (6) for a tire (1) comprising a shell (4) intended to mold the sidewall (10) of the tire (1), characterized in that said shell (4) comprises a housing (40) in which is mounted a mold element (2) characterized in accordance with any one of the preceding claims.
    [0010]
    10. A manufacturing method (P) of a mold element (2) for a mold (3) of a tire (1), said mold (3) comprising a shell (4) intended to mold the sidewall (10) of the tire ( 1), said mold element (2) being a removable plate 30 intended to be mounted in a housing (40) of said shell (4) and having a marking (20), characterized in that said method (P) comprises: extracting said mold member (2) from an aluminum plate; producing the marking (20) for molding on the tire (1) an encoded matrix symbol (5) in contrast with the sidewall (10); ) of the tire (1), said coded matrix symbol (5) having dark portions (50) and clear portions (51), the embodiment of said marking (20) comprising: producing the marking adapted to mold the clear portions (51); ) the coded matrix symbol (5) in said mold element (2); and - producing the marking adapted to mold the dark portions (50) of the coded matrix symbol (5) in said mold member (2).
    [0011]
    11. Manufacturing method according to the preceding claim 10, characterized in that the steps of producing the marking adapted to mold the clear portions (51) and the dark portions (50) of the coded symbol (5) in said mold member ( 2) are carried out simultaneously by stamping said mold member (2).
    [0012]
    12. The manufacturing method as claimed in claim 10, characterized in that the embodiment of the marking adapted to mold the clear parts (51) of the coded symbol (5) in said mold element (2) takes place before the extraction. said mold member (2) from the aluminum plate.
    [0013]
    13. Manufacturing process according to claim 10 or claim 12, characterized in that the embodiment of the marking suitable for molding the clear portions (51) of the coded symbol (5) is effected: by a surface treatment of said mold member (2) so that the surface of said mold member (2) corresponds to said light portions (51); or by microbeading a second set of protuberances (203) projecting from said mold member (2) to form the marking (20) of the coded matrix symbol (5) so that said protuberances (203) are cap-shaped spherical, each protuberance member (203) being interpenetrated in the marking (20) with a plurality of adjacent protruding elements, the second set of protuberances (203) being adapted to mold said clear portions (51) of the coded matrix symbol (5); or - by molding a set of cavities (204) having the shape of a spherical cap, said set of recesses (204) being adapted to mold said clear portions (51) of the coded matrix symbol (5).
    [0014]
    14. The manufacturing method according to the preceding claim 13, characterized in that the microbead making microbeads of diameter between 10 nm and 200 nm.
    [0015]
    15. The manufacturing method according to claim 10 or any one of the preceding claims 12 to 14, characterized in that the embodiment of the marking (20) adapted to mold the dark portions (50) of the coded matrix symbol (5). in said mold member (2) is effected by providing a first set of cavities (201) or protuberances (202) in said mold member (2) adapted to mold said dark portions (50) of the coded matrix symbol (5) , making the first set of cavities (201) in said mold member (2) by laser etching and producing the first set of protuberances (202) in said mold member (2) being made by molding.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3137289B1|2021-07-14|Tire mould moulding element comprising marking features
    EP3137318B1|2020-07-29|Tyre comprising a high-contrast matrix symbol on the sidewall thereof
    EP2895340B1|2017-05-03|Tyre comprising a high contrast pattern comprising a plurality of cavities
    EP2895338B1|2017-02-22|Heavy duty tread and tire
    EP3439901B1|2021-06-09|Tire
    FR2883508A1|2006-09-29|WEAR INDICATOR FOR PNEUMATIC
    WO2012171802A1|2012-12-20|Tyre comprising a high-contrast pattern and ribs for protecting the pattern
    WO2016005573A2|2016-01-14|Tyre comprising a mark formed by a plurality of linear patterns
    EP3166802A1|2017-05-17|Tyre comprising a mark including a plurality of grey levels
    EP3074247B1|2018-05-09|Tyre comprising a defect-masking pattern on a sidewall
    EP2307209A1|2011-04-13|Tyre wear indicator
    FR3079168A1|2019-09-27|PNEUMATIC HAVING A PARTICULAR PATTERN COMPRISING A PLURALITY OF CAVITIES
    EP3439900B1|2021-03-10|Tire
    EP3484698B1|2020-05-13|Textured blade for the lining of a mold used for vulcanizing a tire
    FR3102394A1|2021-04-30|Tire baking mold comprising a removable insert, and associated manufacturing process
    FR2832091A1|2003-05-16|TIRE MOLD
    FR3075099A1|2019-06-21|PNEUMATIC HAVING A PARTICULAR PATTERN COMPRISING A PLURALITY OF PROTUBERANCES
    FR3063455A1|2018-09-07|PNEUMATIC HAVING A TEXTURE ON A FLANK
    EP2552624B1|2014-02-26|Molded aluminum alloy vehicle wheel comprising a stylized pattern, method for obtaining such a wheel and mold used by said method
    同族专利:
    公开号 | 公开日
    WO2015165862A1|2015-11-05|
    EP3137289A1|2017-03-08|
    FR3020593B1|2016-12-23|
    JP2017514728A|2017-06-08|
    CN106457711A|2017-02-22|
    BR112016024933A2|2018-12-04|
    US20170080656A1|2017-03-23|
    EP3137289B1|2021-07-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1567402A|1922-05-17|1925-12-29|Century Rubber Works|Tire mold|
    US2296016A|1940-11-12|1942-09-15|Akron Standard Mold Co|Tire mold|
    US4444713A|1982-08-09|1984-04-24|The Goodyear Tire & Rubber Company|Decorative ornamentation for a rubber article and method of making same|
    DE102004010060A1|2004-03-02|2005-09-22|Continental Ag|Vehicle tyre comprises surface raised areas and depressions, and a height or depth equivalent to the wavelength of visible light|
    US20090218019A1|2005-10-21|2009-09-03|Antoine Paturle|Mark with Improved Visibility and Marketing Method|
    WO2009007790A1|2007-07-11|2009-01-15|Pirelli Tyre S.P.A.|Process and apparatus for vulcanization and moulding of vehicles tyres|
    US7883326B1|2010-01-27|2011-02-08|The Goodyear Tire & Rubber Company|Apparatus and assembly for interchanging indicia of tire molds|FR3075099A1|2017-12-18|2019-06-21|Compagnie Generale Des Etablissements Michelin|PNEUMATIC HAVING A PARTICULAR PATTERN COMPRISING A PLURALITY OF PROTUBERANCES|US4198774A|1977-11-18|1980-04-22|The Goodyear Tire & Rubber Company|Indicia for rubber articles|
    JPH04191013A|1990-11-27|1992-07-09|Sumitomo Rubber Ind Ltd|Manufacture of tire mold|
    JPH0596914A|1991-10-04|1993-04-20|Matsushita Electric Ind Co Ltd|Tire, identification control method and code forming method thereof|
    EP0576892B1|1992-07-02|1996-01-10|Compagnie Generale Des Etablissements Michelin-Michelin & Cie|Tire mould, manufacturing process for such a mould and tire molding process using such a mould|
    JP2603179B2|1992-11-10|1997-04-23|住友ゴム工業株式会社|Tire molding vulcanization mold|
    JP3831072B2|1997-07-08|2006-10-11|株式会社ブリヂストン|Pneumatic tire with a decorative body consisting of many ridges|
    ES2307051T3|2003-06-23|2008-11-16|Bridgestone/Firestone North American Tire, Llc|PROCEDURE AND SYSTEM FOR MARKING TIRES.|
    US20080283169A1|2007-02-22|2008-11-20|Toyo Tire & Rubber Co., Ltd.|Pneumatic Tire|
    FR2950566B1|2009-09-28|2011-08-26|Michelin Soc Tech|HIGH CONTRAST PNEUMATIC PATTERN AND METHOD OF OBTAINING|
    FR2976523B1|2011-06-15|2014-07-25|Michelin Soc Tech|PNEUMATIC COMPRISING A HIGH-CONTRAST PATTERN AND PATTERN PROTECTION RIBS|
    CN103182908B|2011-12-31|2016-02-24|赛轮金宇集团股份有限公司|A kind of tire with multicolour pattern and production method thereof|FR3059585A1|2016-12-06|2018-06-08|Compagnie Generale Des Etablissements Michelin|MOLD ELEMENT FOR PNEUMATIC MOLD INCLUDING REMOVABLE INSERT|
    JP6259137B1|2017-03-13|2018-01-10|東洋ゴム工業株式会社|Tire vulcanization mold and tire manufacturing method using the same|
    KR102098798B1|2017-03-28|2020-04-08|요코하마 고무 가부시키가이샤|Pneumatic tire, mold of pneumatic tire, inspection method of two-dimensional code engraving, and method of manufacturing pneumatic tire|
    WO2018194081A1|2017-04-20|2018-10-25|横浜ゴム株式会社|Method for producing pneumatic tires, tire mold, and pneumatic tires|
    JP2020517499A|2017-04-26|2020-06-18|クーパー タイヤ アンド ラバー カンパニーＣｏｏｐｅｒ Ｔｉｒｅ ＆ Ｒｕｂｂｅｒ Ｃｏｍｐａｎｙ|Ball Hitch Tip Out Plug, Triangle Leg Tip Out Plug, Combination, and Tip Out Plug Tool|
    IT201800020395A1|2018-12-20|2020-06-20|Pirelli|Method of controlling a molding and vulcanization process of a tire and tire obtained through a manufacturing process that implements this method|
    IT201800020410A1|2018-12-20|2020-06-20|Pirelli|Process and apparatus for marking a panel containing information to be printed on a tire and panel made through this process and apparatus|
    DE102019213874A1|2019-09-11|2021-03-11|Continental Reifen Deutschland Gmbh|Combined manufacturing process for a molding tool for shaping vulcanization of vehicle tires and vehicle tires|
    WO2021065294A1|2019-09-30|2021-04-08|横浜ゴム株式会社|Pneumatic tire|
    FR3102394A1|2019-10-24|2021-04-30|Compagnie Generale Des Etablissements Michelin|Tire baking mold comprising a removable insert, and associated manufacturing process|
    DE102019219669A1|2019-12-16|2021-06-17|Continental Reifen Deutschland Gmbh|3D printing of tire moldings|
    法律状态:
    2015-04-21| PLFP| Fee payment|Year of fee payment: 2 |
    2015-11-06| PLSC| Publication of the preliminary search report|Effective date: 20151106 |
    2016-04-21| PLFP| Fee payment|Year of fee payment: 3 |
    2017-04-19| PLFP| Fee payment|Year of fee payment: 4 |
    2018-04-20| PLFP| Fee payment|Year of fee payment: 5 |
    2019-04-18| PLFP| Fee payment|Year of fee payment: 6 |
    2020-04-20| PLFP| Fee payment|Year of fee payment: 7 |
    2021-04-23| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1453986A|FR3020593B1|2014-04-30|2014-04-30|MOLD ELEMENT FOR PNEUMATIC MOLD COMPRISING A MARKING|FR1453986A| FR3020593B1|2014-04-30|2014-04-30|MOLD ELEMENT FOR PNEUMATIC MOLD COMPRISING A MARKING|
    US15/307,996| US20170080656A1|2014-04-30|2015-04-28|Mould Element For A Tire Mould Comprising A Mark|
    CN201580023043.4A| CN106457711A|2014-04-30|2015-04-28|Mould element for a tyre mould comprising a mark|
    BR112016024933A| BR112016024933A2|2014-04-30|2015-04-28|tire mold molding element comprising a marking|
    PCT/EP2015/059121| WO2015165862A1|2014-04-30|2015-04-28|Mould element for a tyre mould comprising a mark|
    JP2016565441A| JP2017514728A|2014-04-30|2015-04-28|Mold element for a tire mold having a mark|
    EP15718499.5A| EP3137289B1|2014-04-30|2015-04-28|Tire mould moulding element comprising marking features|
    [返回顶部]