• 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:

    公开号:BE1020734A3
    申请号:E201300195
    申请日:2013-03-26
    公开日:2014-04-01
    发明作者:Loesch Manfred
    申请人:Bosch Gmbh Robert；Bosch Henry；
    IPC主号:
    专利说明:

    Wischqummi-Herstellunq by means of fabric tape
    description
    The present invention relates to a method for producing a wiper blade rubber, a correspondingly produced squeegee and a wiper equipped therewith.
    State of the art e
    Wiper blades for windshield wipers are usually designed to adapt to the contour of a glass pane of a vehicle and to remain flexible at different temperatures.
    However, compared to other materials, such as glass or plastic, elastomers have high coefficients of sliding friction, which can cause noise during wiping and wiping rubber wears quickly.
    It is known to apply to reduce the sliding friction thermoplastic particles on the squeegee and, where appropriate, melt together to form a friction-friction-reducing layer. In the known methods, however, the particles are applied uncontrollably in a random distribution to the squeegee, which can lead to significant fluctuations within the friction-reducing layer.
    Document EP 1 288 089 A2 describes a process for producing a wiper rubber in which a polymer layer in the form of a film is applied to a wiper rubber profile.
    Document US 2010/0095472 A1 describes a squeegee with a particle-formed surface structuring.
    Disclosure of the invention
    The present invention relates to a method for producing a wiper blade rubber, in particular for a (vehicle) windscreen wiper, comprising the method steps: a) providing a squeegee profile which comprises a wiper lip section and a fastening section; and b) applying particles to at least a portion of the squeegee profile through at least one particulate cloth tape.
    The position of the particles can advantageously be predetermined by the fabric band, in particular by the stitches of the fabric band. This, in turn, advantageously makes it possible to achieve a uniform distribution of the particles on the wiper rubber profile and, in particular, also a spacing of the particles from one another. By advantageously both a more uniform wear resistance of the wiper blade rubber and an improved wiping behavior and an improved wiping quality of the wiper blade rubber can be achieved. In particular, a more even and higher wear resistance and a lower noise during wiping can be achieved. In addition, can be dispensed with an elaborate handling of powder by the fabric tape advantageously.
    The at least one subregion of the wiper rubber professional may in particular be at least one subregion of the wiper lip section of the wiper rubber profile. For example, in method step b), particles can be applied to at least one partial area of the wiper lip section of the wiper-rubber profile. In particular, in method step b) particles can be applied to the subregions of the side surfaces of the wiper lip section of the squeegee rubber profile adjacent to the wiping edges.
    The fabric tape may be in the form of a, in particular repetitive, pattern. The pattern may in particular be symmetrical and / or configured such that the meshes are homogeneously distributed and / or equidistant from each other.
    Within the scope of one embodiment, the particles are received in the meshes of the at least one fabric band. For example, the particles can be at least partially pressed into the mesh and / or clamped or held in the mesh or between the mesh-forming fibers of the fabric band.
    Such a particle-provided fabric tape can be produced, for example, by applying particles uniformly distributed, for example, to the fabric tape, or, conversely, by applying, in particular laying on, the fabric tape to a layer of uniformly distributed particles. In this case, if necessary, the fabric tape can be moved back and forth, in particular shaken, in order to allow particles, if appropriate, to be attached to fibers of the fabric tape, to enter the stitches of the fabric tape. The position of the particles can then be fixed on the particle-side side and the fabric tape can be pressed from the other side in such a way that the stitch-forming fibers of the fabric band wrap around the particles. The position of the particles can be fixed, for example, by attaching a plate, a roller or a belt with a smooth surface to the side facing away from the fabric tape side of the particles, wherein the fabric tape through a plate, a roller or a tape with a on the fabric structure, in particular the fiber structure, the fabric band adapted structuring is moved in the direction of the particles.
    Within the scope of a preferred embodiment of this embodiment, essentially only one particle each is picked up by a mesh of the at least one fabric band. Thus, advantageously, a particularly uniform distribution of the particles on the squeegee profile and a particularly uniform spacing of the particles to each other can be achieved.
    Such a configuration of the fabric tape can be achieved in particular by a targeted adaptation of the mesh size of the fabric tape to the particle size of the particles to be applied. For example, the mesh size of the fabric tape can be selected such that it is the same size or, if appropriate, slightly smaller than the particle size of the particles to be applied. By a slightly smaller mesh size of the fabric tape, the particles - if so desired - may optionally be held more firmly by the mesh-limiting fibers of the fabric tape. However, this can also be adjusted by other parameters, such as material properties of the fibers, for example the elasticity and / or adhesion properties of the fiber material, and / or tissue properties, for example the elasticity and / or dimensioning of the weave structure.
    In a further embodiment, in method step b), a pressure is exerted on the at least one fabric band and the at least one portion of the squeegee profile. As a result, the particles can advantageously be transferred from the fabric band to the squeegee profile. In particular, the particles can also be physically connected to the squeegee profile.
    In the context of a special embodiment of this embodiment, the pressure is exerted by at least one pressure roller, for example a pressure roller system.
    Within the scope of a further embodiment, in method step b) particles are applied to two, mutually opposite partial regions of the wiper-rubber profile by means of two fabric strips provided with particles. Thus, advantageously, the process steps can be minimized and the process time can be shortened.
    The squeegee profile can in particular be extruded or provided by extrusion in method step a). In particular, in process step a), a wiper-rubber profile in the form of a strand, for example a wiper-rubber double strand, can be provided, in particular extruded.
    In a further embodiment, the method further comprises the method step c): heating at least the at least one subregion of the squeegee profile. By heating, in particular, the physical connection between the squeegee profile and the particles can be reinforced and optionally, in addition, a chemical bond can be formed between the material of the squeegee profile and the material of the particles. The heating in process step c) can be carried out in particular by vulcanizing the at least one subregion of the wiper rubber profile, for example the complete wiper rubber profile. Preferably, in process step a) an unvulcanized or at least only partially vulcanized, in particular an unvulcanized, wiper rubber profile is provided. In method step c), the squeegee profile can then be vulcanized or at least vulcanized, in particular vulcanized.
    The vulcanization can be carried out in particular by means of a heat treatment medium, for example by means of a liquid salt bath. The liquid salt bath may, for example, be a melt containing, for example, a mixture of potassium nitrate and / or sodium nitrate and / or sodium nitrite and / or lithium nitrite. The vulcanization can be carried out, for example, at a temperature in a temperature range of> 150 ° C to <300 ° C.
    Within the scope of a further embodiment of this embodiment, in method step c), the at least one subregion of the squeegee profile is (only) heated in such a way that the particles essentially retain their shape. In this way, the wiper rubber profile can be provided by the particles with a hydrophobic lotus effect, which can affect the wiping behavior and the wiping quality of the wiper blade rubber. By the fabric tape can be achieved a particularly uniform distribution and spacing of the particles to each other, which has an advantageous effect on the lotus effect.
    Within the scope of another embodiment of this embodiment, in method step c), the at least one subregion of the squeegee profile is heated in such a way that the particles fuse together to form a substantially continuous layer. Thus, advantageously, for example, a friction-reducing, coating can be realized. In this case, a particularly uniform coating can be achieved by the fabric tape, whereby both a uniform wear resistance of the wiper blade rubber and an improved wiping behavior and an improved wiping quality of the wiper blade rubber can be achieved.
    Also inasmuch as the particles are melted in process step d), micro-depressions introduced at precisely defined locations advantageously have an effect on the bond between the wiper rubber profile and the coating.
    By the subsequent heating in method step d), the physical connection between the wiper rubber profile and the particles or coating can be intensified and optionally additionally a chemical bond can be formed between the material of the wiper rubber profile and the material of the particles or the coating. It is particularly possible in process step d) to heat the entire squeegee profile.
    The particulate fabric tape may be a consumable.
    Preferably, however, the fabric tape is reused.
    In the context of a further embodiment, therefore, the at least one fabric band is guided in a circle and provided again with particles after method step b).
    In a further embodiment, the particles comprise polymer particles, in particular thermoplastic polymer particles, and / or friction-reducing particles. In particular, the particles may be polymer particles, in particular thermoplastic polymer particles, and / or friction-reducing particles.
    Polymer particles may advantageously enter into a physical and / or chemical bond with the squeegee profile during process step c). For example, the particles may include ultrahigh molecular weight polyethylene (UHMW-PE) particles, high density polyethylene (HD-PE) particles, low density polyethylene (LD-PE) particles, isotactic polypropylene (PP) particles, polyamide particles (PA) particles, Polytetrafluoroethylene particles (PTFE) or a mixture thereof include or be. In particular, the particles may be polyolefin particles, for example crystalline polyolefin particles, in particular ultrahigh molecular weight polyethylene (UHMW-PE) particles. For example, particles made of ultrahigh molecular weight polyethylene (UHMW-PE) sold under the trade name MIPELON by Mitsui Chemicals can be used.
    However, the particles can also comprise or be friction-reducing particles, for example inorganic friction-reducing particles, for example soot particles, graphite particles, molybdenum disulfide particles and / or silicate particles.
    Within the scope of a further embodiment, the meshes of the at least one fabric band have an average mesh size in a range of> 5 pm to <100 pm, in particular of> 5 pm to <20 pm, for example of> 4 pm to 19 pm Dimensioning of the fabric tape may be advantageous, for example, if particles having an average particle size in a range of from 5 pm to s 100 pm, in particular from> 5 pm to <20 pm, are used. In this case, the fabric tape may, for example, an average thickness in a range of> 1 pm to 5 50 pm, for example from> 1 pm to slOpm have. Preferably, the average mesh size of the fabric tape, the average thickness of the fabric tape and the average particle size are matched to one another such that the particles can be taken up in the meshes and held in particular and thereby project beyond the surface of the fabric tape at least on one side, optionally on both sides. For example, the average mesh size of the fabric tape may substantially correspond to the average particle size and / or the average thickness of the fabric tape may be substantially smaller than the average particle size.
    Within the scope of a further embodiment, the particles have an average particle size in a range from> 5 pm to> 100 pm, for example from> 5 pm to <20 pm. By applying a plurality of, preferably spaced-apart, particles having a particle size of> 5 pm to ^ 20 pm, the squeegee can be advantageously provided with a hydrophobic lotus effect.
    In the context of a further embodiment, the fibers or fiber strands of the at least one fabric strip, in particular, form an average fiber diameter or fiber strand diameter in a range from 5 gm to 2 100 gm, for example from 5 5 gm to 60 gm. In this way, the tissue band advantageously allows the average distance between the particles to be predetermined. To achieve a lotus effect, it has proven to be advantageous to choose the average fiber strand diameter of the mesh-forming fibers or fiber strands and thus the average distance between the particles such that it is in a range of s 5 gm to 2 50 gm is located.
    The squeegee profile may in particular comprise or be formed from at least one elastomeric material. For example, the elastomeric material may be selected from the group consisting of ethylene-propylene-diene monomer rubber (EPDM), ethylene-propylene monomer rubber (EPM), chlorobutyl rubber, bromobutyl rubber, chloroprene rubber (CR), Natural rubber (NR), polyurethane rubber and combinations thereof. In particular, the squeegee profile may be polyolefin-based.
    The squeegee profile can in particular be a squeegee double profile whose cross-sectional area corresponds to the cross-sectional area of two squeegee rubbers which are connected to one another via the two wiper lip sections. The squeegee double profile can be designed in particular in the form of a strand, for example an extrusion strand. In this case, the method can, in particular, furthermore comprise the method step: d): separating the wiper rubber double profile into individual wiper rubbers. The squeegee double profile can be separated, for example, in particular horizontally, between the two wiper lip sections. Insofar as the wiper-rubber double profile is designed in the form of a strand, the strand can also be separated, in particular several times, perpendicular to the longitudinal extension of the wiper-rubber strand, for example to produce a plurality of wiper-rubbers.
    With regard to further technical features and advantages of the method according to the invention, reference is hereby explicitly made to the explanations in connection with the squeegee and wiper according to the invention and with the figures.
    Further objects of the present invention are a squeegee made by a method according to the invention and a windshield wiper comprising such a squeegee.
    With regard to further technical features and advantages of the wiper rubber and windscreen wiper according to the invention, reference is hereby explicitly made to the explanations in connection with the method according to the invention and with the figures.
    drawings
    Further advantages and advantageous embodiments of the subject invention are illustrated by the drawings and explained in the following description. It should be noted that the drawings have only descriptive character and are not intended to limit the invention in any way. Show it
    1 shows a schematic cross section through a Anlange for carrying out an embodiment of the method according to the invention.
    2 shows a schematic cross section through a system for carrying out another embodiment of the method according to the invention;
    FIG. 3a is a schematic plan view of an embodiment of a particulate fabric band; FIG.
    FIG. 3b shows a schematic cross section through the fabric band shown in FIG. 3a; FIG.
    Fig. 3c is a schematic plan view of a side surface of the wiper lip portion of a squeegee profile to which particles have been applied by the fabric tape shown in Figs. 3a and 3b;
    FIG. 3d shows a schematic cross section through the wiper lip section shown in FIG. 3c; FIG. and
    4 shows a schematic cross section through an embodiment of a wiper rubber produced according to the invention.
    FIG. 1 illustrates that a process step a) extrudes a strand-like wiper rubber profile 1, which comprises a wiper lip section and a fastening section. In FIG. 1, in particular, the wiper lip section of the wiper rubber profile 1 is shown, which has two opposite side surfaces 2c, 2c '. FIG. 1 illustrates that in a method step b) particles 5, for example thermoplastic polymer particles and / or sliding friction reducing particles 5, are applied to the two opposite side surfaces 2cm 2c 'of the wiper lip section by two fabric strips 21, 21' provided with particles 5. In order to better illustrate the method according to the invention, the particles 5 are shown greatly enlarged in the figures. By means of a pressure roller system 22, 22 ', a pressure p is exerted on the fabric tapes 21, 21' and the side surfaces 2 c, 2 c 'of the wiper lip section and thus also on the particles 5. By means of this pressure p, a physical connection can be effected between the particles 5 and the side surfaces 2c, 2c 'of the wiper lip section. Alternatively or additionally, the wiper rubber profile 1 and / or the particles 5 can be heated for this purpose. Preferably, the particles 5 are applied as soon as possible after the extrusion of the squeegee profile, since then the dimensional stability of the extruded material is still low and thereby a bond between the particles 5 and the squeegee profile 1 can be easily effected. After application of the particles 5, the wiping rubber profile provided with particles 5 can be vulcanized in a method step c), wherein the bond between the particles 5 and the wiper rubber profile 1 can be further solidified. In the context of the embodiment shown in FIG. 1, the fabric strips 21, 21 'provided with particles 5 are consumables which are unwound from dispenser rolls 23, 23'.
    The embodiment shown in FIG. 2 differs in the essential only from the embodiment shown in FIG. 1 in that the two fabric tapes 21, 21 'are guided in a circle and are provided again with particles 5 after method step b).
    FIG. 3a is a schematic plan view of an embodiment of a fabric band 21 provided with particles 5. FIG. 3a shows that the particles 5 are received, in particular clamped, in meshes 21a of the fabric band 21. In each case only one particle 5 is picked up by a mesh 21a of the fabric belt 21.
    Figure 3b is a schematic cross-section through the fabric tape shown in Figure 3a.
    FIG. 3c is a schematic plan view of a side surface 2c of the wiper lip section of a squeegee profile 1 onto which particles 5 have been applied by the fabric belt 21 shown in FIGS. 3a and 3b.
    FIG. 3d is a schematic cross-section through the wiper lip section shown in FIG. 3c and illustrates that particles 5 were also applied to the other, opposite side surface 2c 'by a further fabric band 21' provided with particles 5 as shown in FIGS. 3a and 3b ,
    FIG. 4 shows a schematic cross section through an embodiment of a wiper rubber 10 produced according to the invention. FIG. 4 illustrates that the squeegee 10 comprises a wiper rubber base body 1 which has a wiper lip section 2 which is connected to a fastening section 4 via a tilting web section 3. FIG. 4 illustrates that the wiper lip section 2 has two wiping edges 2a, 2a ', between which an end face 2b is formed and to which a side face 2c, 2c' adjoins the 2a, 2a '. In addition to the two wiping edges 2a, 2a 'of the wiper lip section 2, the subregions of the two side faces 2c, 2c', which adjoin the wiping edges 2a, 2a ', are involved in the wiping function of the wiper blade rubber 10. It has proven to be advantageous, in particular, to provide the side surfaces 2c, 2c 'of the wiper lip section 2 with a functional layer 5, for example a water-repellent or other, friction-friction-reducing layer 5.
    FIG. 4 illustrates that the partial regions of the side surfaces 2c, 2c 'of the wiper lip section 2 adjacent to the wiping edges 2a, 2a' each have a functional layer 5 which can be formed by the applied particles 5. In this case, the layer 5 may be an open layer of, in particular spaced-apart, particles 5. However, it is also possible that the layer 5 is a substantially continuous thin layer formed by fusing the particles 5 together.
    权利要求:
    Claims (15)
    [1]
    1. Verfahren zur Herstellung eines Wischgummis (10), insbesondere für einen Scheibenwischer, umfassend die Verfahrensschritte:
    a) Prepare a Wischgummi-Profils (1) with a Wischlippenabschnitt (2) und einem Befestigungsabschnitt (4); und
    b) Aufbringen von Partikeln (5) on mindestens einen Teilbereich (2c, 2c ') des Wischgummi-Profils (1) durch mindestens ein mit Partikeln (5) versehenes Gewebeband (21.2T).
    [2]
    2. Verfahren nach Anspruch 1, wobei that Partikel (5) in the Maschen (21a) of mind mind einen Gewebebeses (21,21 ').
    [3]
    3. Verfahren nach Anspruch 1 or 2, wobei im Wesentlichen jeweils nur ein Particle (5) von einer Masche (21a) des mindestens einen Gewebebandes (21,21 ') aufgenommen wird.
    [4]
    4. Verfahren nach einem der Ansprüche 1 bis 3, wobei in Verfahrensschritt b) ein Druck (p) auf das mindestens eine Gewebeband (21,21 ') und den mindestens einen Teilbereich (2c, 2c') des Wischgummi-Profils (1) ausgeübt wird.
    [5]
    5. Verfahren nach Anspruch 4, wobei der Druck (p) durch mindestens eine Anpresswalze (22.22 '), beispielsweise ein Anpresswalzensystem, ausgeübt wird.
    [6]
    6. Verfahren nach einem der Ansprüche 1 bis 5, wobei in Verfahrensschritt b) Particle (5) durch zwei, mit Partikeln (5) versehene Gewebebänder (21,21 ') auf zwei, einander gegenüber Flying Teilbereiche (2c, 2c') des Wischgum -mi-Profils (1) were introduced.
    [7]
    7. Verfahren nach einem der Ansprüche 1 bis 6, wobei in Verfahrensschritt b) Particle (5) auf mindestens einen Teilbereich des Wischlippenabschnitts (2) des Wischgummi-Profils (1), insbesondere auf an die Wischkanten (2a, 2a ') anicheende der Seitenflächen (2c, 2c ') des Wischlippenabschnitts (2) des Wischgummi-Profils (1).
    [8]
    8. Verfahren nach einem der Ansprüche 1 bis 7, wobei das Verfahren weiterhin den Verfahrensschritt:
    c) Erhitzen, insbesondere Volcanisieren, zumindest des mindestens einen Teilbereichs (2c, 2c ') des Wischgummi-Profils (1), umfasst.
    [9]
    9. Verfahren nach einem der Ansprüche 1 bis 8, wobei das mindestens eine Gewebeband (21,21 ') im Kreis geführt wird und nach Verfahrensschritt b) erneut mit Partikeln (5) versehen wird.
    [10]
    10. Verfahren nach einem der Ansprüche 1 bis 9, wobei die Partikel (5) Polymer Particle, insbesondere thermoplastic Polymer Particle, and / or gleitreibungssenkende Particle umfassen.
    [11]
    11. Verfahren nach einem der Ansprüche 1 bis 10, wobei die Maschen (21a) des mindestens ein Gewebebeses (21,21 ') eine durchschnittliche Maschengröße in einem Bereich von> 5 pm bis <100 pm aufweisen.
    [12]
    12. Verfahren nach einem der Ansprüche 1 bis 11, wobei die Fasern (21b) beziehungsweise Faserstränge des mindestens einen Gewebebandes (21,21 ') einen durchschnittlichen Faserdurchmesser beziehungsweise Faserstrangdurchmesser in 1 aweuf pm a.
    [13]
    13. Verfahren nach einem der Ansprüche 1 bis 12, wobei die Partikel (5) eine durchschnittliche Partikelgröße in einem Bereich von ä 5 pm bis ^ 100 pm aufweisen.
    [14]
    14. Wischgummi, hergestellt durch ein Verfahren nach einem der Ansprüche 1 bis 13.
    [15]
    15. Scheibenwischer, umfassend ein Wischgummi nach Anspruch 14.
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    同族专利:
    公开号 | 公开日
    FR2988355B1|2015-04-10|
    FR2988355A1|2013-09-27|
    MX2013003273A|2013-09-25|
    DE102012204764A1|2013-09-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1288089A2|2001-08-29|2003-03-05|National Gummi AB|Wiper blade and a method for the manufacturing thereof|
    EP1561656A2|2004-02-09|2005-08-10|Robert Bosch Gmbh|Wiper blade and a method for the manufacturing thereof|
    US20100095472A1|2007-03-19|2010-04-22|Robert Bosch Gmbh|Wiper blade rubber and method for the production thereof|
    DE102009000912A1|2009-02-17|2010-08-19|Robert Bosch Gmbh|Method for producing a rope-shaped profile|
    BE555621A|1953-12-10|1900-01-01|
    US2908028A|1957-08-22|1959-10-13|Russell Mfg Co|Windshield wiper or the like|
    EP0487801A1|1990-11-28|1992-06-03|Adrian Cavenago|Wiper blade|FR3034734B1|2015-04-10|2018-09-07|Valeo Systemes D'essuyage|WIPER BLADE FOR WIPER BLADE|
    NL2016033B1|2015-12-24|2017-07-21|Federal-Mogul S A|Windscreen wiper device.|
    法律状态:
    2020-12-23| MM| Lapsed because of non-payment of the annual fee|Effective date: 20200331 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102012204764|2012-03-26|
    DE201210204764|DE102012204764A1|2012-03-26|2012-03-26|Method for manufacturing wiper rubber part for windshield wiper of glass pane of vehicle, involves providing wiping rubber extrusion, and introducing particles into portions of wiping rubber extrusion through fabric strips|
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