FR2988357A1 - WIPING BLADE WITH REDUCED FRICTION COEFFICIENT - Google Patents

Abstract

A wiper blade for wiper blade, particularly for a vehicle comprising: a fixing segment (1), and a wiping lip segment (2). The surface (Q) of the section of the fixing segment (1) and / or the wiping lip segment (2) varies in the longitudinal direction (L) of the wiper blade.

Description

Field of the Invention The present invention relates to a wiper blade for a wiper blade, in particular for equipping a vehicle as well as to its manufacturing process.

STATE OF THE ART Multiple processes are known with the aim of improving the frictional behavior of a wiper blade of a motor vehicle wiper blade according to the different states of the surface of the window pane such as dry, wet or dirty.

The current materials used for the wiper blades are aging and thus their friction characteristics are changing. However, the increase in the coefficient of friction results in an annoying effect of chatter producing bad wiping and noise. The following documents US 2004/0237229 A1, EP 1 390 430 B1, JR 2001091609, WO 1998/1010965 A1, JP 2003-138216, DE 2008 004 636 A1, TW 412487 B, WO 2004/002791 and US 2003/0233722 A1. , describe different possibilities for improving the wiper blade. DESCRIPTION AND ADVANTAGES OF THE INVENTION The object of the present invention is to remedy the drawbacks of the known solutions and thus to provide a windscreen wiper blade, in particular for equipping a vehicle comprising, a segment of fixing and a wiping lip segment, characterized in that the surface of the section of the fixing segment and / or the wiping lip segment varies in the longitudinal direction of the wiper blade. This wiping blade makes it possible to reduce its coefficient of friction as well as the effect of the differences in friction between the wiper blade and the window to be wiped as well as the noise and chatter of the wiper blade or the wiper blade. wiper. In other words, it is advantageous that the wiper blade and in particular the fixing segment and / or the segment of the blade wiper lip have a geometry which is not uniform or constant according to the invention. longitudinal extension of the wiper blade.

It has been found according to the invention, that in a simple manner, the friction of the wiper blade on the window is advantageously reduced by a factor ranging from 2 to 10. Because of the surface of the section which varies in In the longitudinal direction of the wiper blade, such wiper blades can not be produced by an extrusion method, but by injection, which corresponds to a preferential development. The surface area of the securing segment section and / or the segment of the wiper lip can be varied in the longitudinal direction of the wiper blade by different shapes used alone or in combination and which will be detailed. below. According to one development, the area of the section of the securing segment and / or the segment of the wiping lip at both ends of the wiper blade is larger or smaller than in the central area of the wiper blade. 'wiping. The term "central zone" of the wiper blade designates in particular the area of the wiper blade located between the two ends of the blade and in which is located the middle of the wiper blade.

According to a development, the surface of the section of the fastening segment and / or the wiper lip segment at the two ends of the blade, laterally and / or vertically and in particular laterally, is greater than in the central segment of the blade. the wiper blade.

According to another alternative or complementary development, the surface of the section of the fixing segment and / or of the wiping lip segment at the two ends of the wiper blade is smaller laterally and / or vertically and in particular vertically. , only in the central area of the wiper blade.

The term "lateral (e)" refers to a lateral extension of the wiper blade, in particular that of the attachment segment and / or the wiping lip segment (see FIGS. 2 and 6 as well as their description). The term "vertical (e)" refers to the extension of the wiper blade along a radius passing through the wiper lip segment through the attachment segment regardless of the spatial direction or the position of the wiper blade and the vertical direction (see Figures 3, 4, 5a, and their description). According to a particular development, the fixing segment and / or the wiper lip segment decreases from one end of the wiper blade in the longitudinal direction of the blade, in particular laterally, and then widens again towards the other end of the wiper blade, especially laterally. According to another particular development, the fixing segment and / or the wiper lip segment, in particular the fixing segment, widen from one end of the wiper blade in the longitudinal direction of the wiper blade. wiping first in particular vertically, and then they decrease again towards the other end, in particular in the vertical direction.

By way of example, the fixing segment and / or the wiper lip segment decreases from both ends of the wiper blade towards the middle of the wiper blade, in particular laterally and / or they widen notably vertically. Such different curvatures (see also FIGS. 2 to 6) of the wiping blade advantageously allow the wiper blade to adapt optimally along its length to the specific window of the vehicle both by the rigidity and by its deflection and take into account the tribological needs. According to a development, the wiper blade has a developed profile in the longitudinal direction of the wiper blade and which, in particular, varies in this longitudinal direction. In particular, the wiping lip segment comprises profiling. The wiper lip segment may include two wiping edges, a front surface between these two edges, and two side surfaces each adjacent to a wiping edge. According to a development of this embodiment, the side surfaces and / or the wiping edges and / or the front surface of the wiping lip segment, have a profiling performed in the longitudinal direction of the wiping lip, variable , especially along the longitudinal direction of the wiper blade.

The wiper lip segment can be profiled both by microstructures and also by macrostructures. According to a particular development in its longitudinal direction, the wiper blade has microstructures in the side surfaces and / or the wiping edges and / or the front surface of the wiping lip segment. In particular, the microstructure can be made in the wiping edges and / or in areas adjacent to the wiping edges of the side surfaces of the wiping lip segment. The microstructure may comprise in particular bosses and cavities and the bosses will have a height and / or an average width ranging from 5 gm up to 100 gm or else 50 gm or even 20 gm and the cavities will have a depth and or an average width ranging from 5 gm up to 100 gm or 50 gm or 20 gm. Thanks to such a microstructure (see also FIGS. 4, 7a-7e), a lotus effect is advantageously achieved, which attracts interestingly to the friction characteristics and the wiping quality of the blade. wiping. According to another special development, alternative or additional, the lateral surfaces of the wiping lip segment have, in the longitudinal direction of the wiping blade, a series of material weakening, for example macroscopic, by example in the form of blind holes and / or a series of reinforcements, for example microscopic material in the form for example of bumps or adjacent reliefs. The weakening of the material and / or the reinforcements of the material can be achieved for example in the central area of the side surfaces of the wiping lip segment. The term "macroscopic weakening of the material" or "macroscopic reinforcements of the material" means in particular a weakening or strengthening of the material by more than one or several millimeters, possibly even up to several centimeters. Making such recesses and / or laterally protruding elements (see also FIGS. 5a and 6), in the wiper blade, makes it possible advantageously to adapt the wiper blade optimally over its length or else by its rigidity. or its deflection behavior, to the specific window of the vehicle and in response to the tribological requirements. An interesting combination of the design elements described above (curved shape, macroscopic structure) makes it possible to advantageously regulate the behavior of the shape of the sweeping blade along its length. By giving a microstructure, one can moreover produce a lotus effect. By adjusting a targeted deformation behavior and / or by introducing a lotus effect, it is advantageous to reduce the coefficient of friction of the wiper blade, reduce the effect of the friction / slip differences between the wiper blade and the wiper blade. window to be wiped, avoiding noise and jittering chatter from the wiper blade or wiper. According to another development, the wiper blade is made of silicone, in particular liquid silicone (liquid silicone rubber LSR) or is made from it. This embodiment of the silicone wiper blade advantageously also reduces the coefficient of friction of the wiper blade, the effect of the differences in friction / sliding between the wiper blade and the window to be wiped. avoid noise and jitter (chatter) from the wiper blade or wiper blade. Alternatively or in addition, this can also be achieved by chemical treatment of the surface of the wiper blade. In principle it is possible to chemically treat the entire surface of the wiper blade. But, preferably, the areas of the wiper blade are treated, for example the wiper lip segment coming into contact with the window. According to another development, the upper surface of the wiper blade, in particular the wiping lip segment is chemically treated surface, for example fluorinated. The treatment can be done for example with gas phase halides. More preferably, the hydrogen atoms are substituted by fluorine atoms in the material which is in particular a polymer on the surface of the wiper blade. The surface of the wiper blade, in particular of the wiping lip segment, can thus be fluorinated.

In particular, since the wiper blade is based on silicone, it can advantageously be tinted in any way. The wiper blade may for example be tinted red on yellow in blue or green, especially with a shade adapted to that of the vehicle. For example, it is possible to improve the appearance of the vehicle or the individual. According to another development, the wiper blade is in color, for example in red, blue, green or yellow. The wiper blade can thus have a similar shade and in particular the same as that of the vehicle. According to a particular development, the wiper blade is made by multi-component injection and / or at least with an injection molding, where appropriate partial. For example, the wiper blade may comprise at least one segment made with another injection component than that of the wiper lip segment and / or in which there is another material, for example a metal that is overmold. The wiper blade may comprise in particular at least one segment made by multi-component injection and / or over-molding and which serves as an adapter for fixing the wiping blade to a wiper arm and / or deflector and / or elastic sheet, for example to achieve a wiper without articulation. Alternatively or in addition, the wiper blade can be made by multi-component injection, extrusion or compression into partial areas of different material qualities, eg natural rubber (NR), rubber chloroprene (CR) or ethylene-propylene-diene-monomer rubber (EPDM) or combinations of these materials or a physical property, in particular with different coefficients of friction and / or different properties or stiffnesses and / or different electrical conductivities and / or wear with different wear and / or different colors. This makes it possible to adjust, where appropriate, color effects, in particular a targeted deformation behavior along the length of the wiper blade. By adjusting a targeted deformation behavior, it is thus also possible to advantageously reduce the coefficient of friction of the wiper blade as well as the effects of the differences in coefficients of friction / adhesion between the wiper blade and the window to be wiped and avoid the noise and jitter of the wiper blade or wiper.

In particular, at least one injection component is electrically conductive, which advantageously makes it possible to produce conductive paths, for example for switching currents and / or signals, for example for a sensor or other users, in particular by injection and / or by over-molding and / or by applying a conductive path by a galvanic coating or by plasma coating. The conductive paths advantageously lead signals near the glass through the wiper blade. The invention also relates to a wiper blade and / or a wiper equipped with a wiper blade according to the invention. The invention also relates to a method of producing a wiper blade comprising a fixing segment and an injection wiper lip segment in an injection mold, the surface of the section of the cavity of the The mold varies according to the longitudinal direction of the wiper blade to be produced in the mold, the method comprising the following steps: a) injecting at least one component, in particular one or more injection components into the mold cavity injection, and b) where appropriate, vulcanize or finish the vulcanization of the molded wiper blade, obtained by injection. The method is based on injection using an injection mold designed to achieve the different forms of wiper blades described above. In particular, the surface of the section of the cavity of the injection mold varies in the longitudinal direction of the wiper blade to be produced. In particular, the injection mold may comprise a microstructure, in particular in the zone used to make the region of the wiping blade in contact with the window during the operation of the windshield wiper. The microstructure can be carried out in the injection or filling process of step a) by copying in a 1: 1 ratio the injection mold and these microstructures can then be vulcanized. Advantageously, structures of up to about 5 μm can be made, which corresponds to a particularly simple embodiment of a surface with a lotus effect.

According to one development, the microstructure is produced in the injection mold. The microstructure may be provided in particular in the longitudinal direction of the wiper blade in the injection mold. Preferably, the microstructure is made in an area of the injection mold for producing the side surfaces and / or the wiping edges and / or the front surface, in particular the wiping edges and / or the zones. lateral surfaces coming to the wiping edges and constituting the wiper lip segment of the wiper blade. The injection method advantageously makes it possible to advantageously make clearances and / or laterally projecting elements of the wiping blade (see FIGS. 5a and 6) to advantageously adapt the wiper blade optimally over its length by its rigidity and its behavior, to the displacement according to the specific pane of the vehicle and according to the tribological necessities. According to another development, the injection tool is designed to develop in the lateral surfaces of the wiper lip segment of the wiper blade to form, in the longitudinal direction of the wiper blade, a series of elements, for example macroscopic material losses, for example in the form of blind holes and / or a series of reinforcements, for example macroscopic of the material, for example in the form of bosses or adjacent reliefs. Thanks to the injection method, different shaped shapes are produced in the wiper blade (see FIGS. 2-6), which advantageously makes it possible to adapt the wiper blade optimally over its length by the rigidity and its deflection behavior to the specific window of the vehicle and tribological necessities. According to a development, the surface of the injection mold cavity section is larger at both ends, for example laterally and / or vertically and in particular laterally than in the central zone.

According to another development, the surface of the cavity section of the injection tool is smaller at both ends, in particular laterally and / or vertically and in particular vertically than in the central zone.

According to a development, the cavity of the injection mold decreases in particular in the area of the fixing segment and / or the wiping lip segment of the wiper blade to be produced, from one end in the longitudinal direction, in particular in the lateral direction and then widen towards the other end, especially in the lateral direction. According to another special development, the cavity of the injection mold widens, in particular in the area of the fixing segment and / or the wiping lip segment of the wiper blade to be produced by starting first with one end in the longitudinal direction, in particular in the vertical direction, and then the section narrows again towards the other end, especially in the vertical direction. The method can rely in particular on the multicomponent injection. Thus, in process step a), two or more components may be injected into the mold cavity. The injection method allows to apply by injection molding (partial overmoulding) at the same time complementary components on the wiper blade. Alternatively or additionally, thus in process step a), at least one injection overmolding, for example a partial overmolding, can be carried out. For example, in process step a), an injection component can be injection-molded with another injection component or alternatively in process variant a), a metal part can be overmolded with one or several injection components. Thus, for example, the adapter used to attach the wiper blade to the wiper arm and / or a deflector and / or an elastic sheet to make a wiper blade. ice without joint. The multicomponent injection further allows, if necessary, to achieve partial areas of the wiper blade with different material qualities or different physical properties. For example, partial areas may be made with a different coefficient of friction, a different wear resistance, a different hardness / rigidity or a different shade.

In addition, it is possible to work two or more different injection components in the wiper blade among which an injection component is sufficiently electrically conductive for switching currents and / or sensor signals. Alternatively, it is also possible to adjust the injection components so that they can receive a galvanic coating for the passage of switching current and / or signaling. Thus, advantageously, the conductive paths may transmit signals through the wiper blade near the window. In process step a), two or more different injection components designed to produce partial zones having a different material quality or different physical properties, in particular with different coefficients of friction, can thus be used. and / or different hardnesses or different rigidities and / or electrical conductivities and / or different wear or wear resistance and / or hues. According to another development, the injection tool is a multi-cavity tool for making several wiper blades. This makes it possible to advantageously realize several wiping blades at the same time. In particular the multi-cavity tool or mold with multiple cavities, may be a stepped mold including cavities in two or more planes, which advantageously allows to produce larger series. According to another development, the injection tool or injection mold comprises modular cavities for producing wiper blades of different lengths with the same tool or injection mold, which advantageously makes it possible to use the same mold The present invention will be described in more detail below with the aid of exemplary embodiments of a wiper blade shown in FIG. in the accompanying drawings in which: - Figure 1 is a schematic perspective view of a conventional wiper blade having a constant sectional area in the longitudinal direction of the wiper blade, - Figure 2 is a schematic perspective view of an embodiment of a wiper blade according to the invention, the fixing segment and the wiping lip segment are decreasing laterally from both ends towards the zone Figure 3 is a schematic perspective view of another embodiment of a wiper blade according to the invention, the attachment segment of which widens in the vertical direction. from both ends towards the middle of the wiper blade, - Figure 4 is a schematic perspective view of another embodiment of a wiper blade according to the invention including the attachment segment widens in the vertical direction from both ends towards the middle of the wiper blade and whose side surfaces of the wiping lip segment are provided with a microstructure in the longitudinal direction of the wiper blade FIG. 5a is a schematic perspective view of another embodiment of a wiper blade according to the invention, the attachment segment of which widens in the vertical direction from both ends towards the middle of the wiper blade and whose lateral surfaces of the wiping lip segment, have a series of macroscopic losses of the material in the form of blind holes in the longitudinal direction of the wiper blade, - Figure 5b is a schematic sectional view on an enlarged scale of the wiper lip segment of the embodiment of FIG. 5a; FIG. 6 is a schematic perspective view of another embodiment of a wiper blade according to the invention, the fixing segment of which the wiper lip segment, decrease laterally from both ends towards the middle of the wiper blade and whose side surfaces of the wiping lip segment comprise in the longitudinal direction of the wiper blade, a series of macroscopic reinforcements of the material in the form of bosses or reliefs delimited with respect to each other; FIGS. 7a-7e are diagrammatic sectional views explaining different possibilities of realization of a microstructure, - Figures 8a-8c are schematic views explaining a chemical surface treatment for different embodiments of the wiper blade according to the invention - Figures 9a-9b are schematic sectional views Explaining the active areas of a wiper blade during a wiping phase. DESCRIPTION OF EMBODIMENTS OF THE INVENTION FIG. 1 shows a known wiper blade having a fastening segment 1 and a wiping lip segment 2, the latter being connected by a tilting spacer 3 to the wiper segment. 1. FIG. 1 shows that the surface Q of the section of the fixing segment 1 and the wiping lip segment 2 remains constant in the longitudinal direction L of the wiper blade. Figure 2 shows an embodiment of a wiper blade according to the invention. FIG. 2 shows that the wiper blade comprises a fixing segment and a wiper lip segment 2, the latter being connected by a tilting spacer 3 to the fixing segment 1. According to FIG. 2, the surface Q of the wiper blade section of the fixing segment and the wiper lip segment 2 (in contrast to FIG. 1 corresponding to a known wiper blade), varies along the longitudinal direction L of the wiper blade. In particular, the surface Q of the section of the attachment segment 1 and the wiper lip segment 2 is larger laterally at both ends of the wiper blade than in the central area thereof. In particular, the fixing segment 1 and the wiping lip segment 2 are decreasing starting from one end of the wiper blade in the longitudinal direction L of the wiper blade, firstly laterally. In other words, the securing segment 1 and the sizing lip segment 2 are decreasing from both ends of the wiper blade towards the middle of the wiper blade according to the lateral direction L. Figure 3 shows another embodiment of a wiper blade according to the invention which also comprises a fixing segment 1 and a wiper lip segment 2, the latter being connected by a spacer of tilting 3 to the fixing segment 1. Fig. 3 shows that the surface Q of the section of the fixing segment 1 also varies in the longitudinal direction L of the wiper blade, in particular the surface Q of the section of the fixing segment. 1 at both ends of the wiper blade is smaller in the vertical direction V than in the central area of the wiper blade. In particular, the fixing segment 1 widens from one end of the wiper blade in the longitudinal direction L of the wiper blade firstly in the vertical direction V and then decreases towards the other end of the wiper blade still in the vertical direction V. In other words, the attachment segment 1 widens in the vertical direction V from both ends of the wiper blade towards the middle of the wiper blade. it.

FIGS. 4 to 6 further show that the wiping lip segment 2 comprises two wiping edges 2a and a front surface 2b between the two wiping edges 2a, as well as two lateral surfaces 2c each connected to a ridge edge wiping 2a. The embodiment shown in FIG. 4 differs essentially from the embodiment of FIG. 3 in that in addition to the lateral surfaces 2c of the wiping lip segment 2 adjacent to the wiping edges 2a, there is a microstructure 4 ', 5' formed of bosses 5 'and cavities 4' in the micrometer range. The embodiment of FIG. 5a differs from the embodiment of FIG. 4 essentially in that the lateral surfaces 2c of the wiping lip segment 2 have a series of macroscopic losses 4 of the material in the form of holes. blinds extending in the longitudinal direction L of the wiper blade. The material losses 4 are in particular made in the central zone of the lateral surface 2c of the wiping lip segment 2. FIG. 5b is a section of a material weakening 4 in the form of a blind hole. The embodiment shown in FIG. 6 differs essentially from the embodiment of FIG. 2 in that in addition to the lateral surfaces 2c of the wiping lip segment 2, they comprise in the longitudinal direction L of the blade of FIG. wiping, a series of macroscopic reinforcement 5 of the material in the form of bosses or reliefs delimited from each other. The material reinforcements 5 are thus in particular formed in the central zone of the lateral surfaces 2c of the wiping lip segment 2. FIGS. 7a-7e show certain possibilities of producing a microstructure extending in the longitudinal direction L of the wiper blade in the side surfaces 2c and / or the wiping edges 2a and / or the lateral surface 2b of the wiper lip segment 2. Preferably, the microstructure is made in the areas of the side surfaces 2c of the wiping lip segment 2 adjacent to the wiping edges 2a, because as shown in Figures 9a and 9b, these areas participate primarily in the evacuation of water. Thanks to the microstructure, a lotus effect is achieved which reduces the friction of the wiping blade on the glass and improves the wiper quality of the wiper blade. FIGS. 7a-7e show that the microstructure comprises bosses 5 'and cavities 4'; the bosses 5 'have a height and / or an average width of 5 gm up to 100 gm; the cavities 4 'have a depth and / or an average width of 5 μm up to 100 μm. Figure 7a shows an embodiment in which the bosses 5 'are curved, flattened in several directions of space. Figure 7b shows bosses 5 'having a tip forming a truncated cone. The embodiment of Figure 7c has bulge-shaped bosses 5 'in several directions of the space. The embodiment shown in FIG. 7d shows bosses 5 'with an inclined surface. The embodiment of FIG. 7e shows semi-cylindrical bosses 5 'with a strongly convex shape in a direction of space. FIGS. 8a-8c show a partial surface chemical treatment, for example a fluorine treatment 6 of the wiping lip segment 2 for three different forms of wiper blade. FIGS. 8a-8c show in particular that the active wiping area of the wiping lip, in particular the areas of the lateral surfaces 2c adjacent to the wiping edges 2a, the wiping edges 2a and the frontal surface 2b of the segment wiper lip 2, have a chemical surface treatment 6. Figure 9a shows that when wiping the water from a window 9, in particular the area of the side surfaces 2c adjacent to the wiping edges 2a , as well as the wiping edges 2a of the wiping lip segment 2, participate in this evacuation. Figure 9b shows a greatly enlarged scale view of a detail of Figure 9a. FIG. 9a also shows that the fixing segment 1 of the wiper blade is slid into a fastening rail 7 of the wiper arm. 15 NOMENCLATURE OF THE MAIN ELEMENTS 1 segment for fixing a wiper blade 2 segment of wiping lip 2a wiping edge 2c side surface adjacent the wiping edge 2a 3 tilting spacer 4 ', 5' microstructure; profiling 6 chemical surface treatment 7 wiper arm fixing rail 8 9 water pane Q section surface of the fixing segment 1 and the wiper lip segment 2 L longitudinal direction of the wiper blade20

Claims (3)

CLAIMS1) Wiper blade wiping blade, in particular for equipping a vehicle comprising: - a fixing segment (1), and - a segment of wiping lip (2), characterized in that the surface (Q) the section of the fixing segment (1) and / or the wiper lip segment (2) varies in the longitudinal direction (L) of the wiper blade. 2) Wiper blade according to claim 1, characterized in that the surface (Q) of the section of the fixing segment (1) and / or the wiping lip segment (2) is larger at both ends. of the wiper blade, in particular in the lateral direction (1) and / or in the vertical direction (V), as in the central zone of the wiper blade and / or the surface (Q) of the section the fixing segment (1) and / or the wiper lip segment (2) at both ends of the wiper blade is smaller, especially in the lateral direction (1) and / or in the vertical direction. (V), only in the central area of the wiper blade. 3) Wiper blade according to claim 1, characterized in that the fixing segment (1) and / or the wiping lip segment (2) decreases from one end of the blade of the wiper blade. wiping in the longitudinal direction (L) of the wiper blade towards the other end of the wiper blade, in particular decreasing in the lateral direction (1) to widen again in the lateral direction (1), and the fixing segment (1) and / or the wiping lip segment (2), in particular the fixing segment (1), widen first in particular in the vertical direction (V ) from one end of the wiper blade in the longitudinal direction (L) of the wiper blade to the other end of this blade to again decrease in the vertical direction (V) .354 °) Blade wiper according to claim 1, characterized in that the wiping lip segment (2) comprises: - two wiping edges (2a), - a forehead surface ale (2b) between the wiping edges (2a), and - two side surfaces (2c) adjacent respectively to a wiping edge (2a), - the side surfaces (2c) and / or the wiping edges ( 2a) and / or the front surface (2b) of the wiper lip segment (2) have a profile (4 ', 5') in the longitudinal direction (L) of the wiper blade and which in particular varies along the longitudinal direction (L) of the wiper blade. 5) A wiper blade according to claim 4, characterized in that a microstructure is produced in the longitudinal direction (L) of the wiper blade in the side surfaces (2c) and / or wiping edges (2a) and / or the front surface (2b) of the wiper lip segment (2). Wiper blade according to Claim 5, characterized in that the microstructure is produced in the wiping edges (2a) and / or in the areas of the lateral surfaces (2c) of the wiper lip segment ( 2) adjacent to the wiping edges (2a), in particular the microstructure consists of bosses and cavities, the bosses having a height and / or average width of gin up to 100 gin and the cavities have a depth and / or average width - 5 gin up to 100 gin. 7 °) wiper blade according to claim 1, characterized in that the wiper blade is made by injection. 358 °) Wiper blade according to claim 1, characterized in that the wiper blade comprises silicone, in particular liquid silicone, in particular the upper surface of the wiper blade, in particular the wiping lip segment. is chemically treated on the surface. 9 °) blade wiper according to claim 1, characterized in that the wiper blade is tinted, for example red, blue, green or yellow and in particular the wiper blade has a similar color and in particular identical to that of the equipped vehicle. 10 °) wiper blade according to claim 9, characterized in that the wiper blade is made by a multi-component injection process and / or at least one overmoulding, - the wiper blade has at least one segment made by multi-component injection and / or by injection molding this segment constituting the adapter for fixing the wiper blade to a wiper arm and / or as a deflector and / or as an elastic blade, by example for producing a wiper blade without hinge and / or - the wiper blade has partial areas made by injection with several components and having different material qualities or different physical properties, including friction coefficients different and / or different hardnesses or different stiffnesses and / or different electrical conductivity and / or wear resistance and / or different shade and / or at least one injection component ction is electrically conductive, especially for conducting a conductive path, for example for switching currents and / or signaling, for example for a sensor or other users and / or for applying a conductive path by galvanic coating or by plasma coating. °) A method of producing a wiper blade comprising a fixing segment (1) and a wiping lip segment (2) by injection with the aid of an injection mold whose surface (Q) of the section of the cavity varies in the longitudinal direction (L) of the wiper blade to be produced in this mold, the method comprising the following steps: a) injecting at least one component, in particular one or more components of injection into the cavity of the injection mold, and b) where appropriate, vulcanize or terminate the vulcanization of the wiper blade as an injection molded part. 12. The method as claimed in claim 11, characterized in that a microstructure is produced in the injection mold according to the longitudinal direction (L) of the wiping blade to be obtained, in particular the microstructure is produced in a zone of the injection mold for producing the side surfaces (2c) and / or the wiping edges (2a) and / or the front surface (2b), in particular the wiping edges (2a) and / or the zones adjacent to the wiping edges (2a) of the side surfaces (2c) of the wiper lip segment (2) of the wiper blade. 13 °) Method according to claim 11, characterized in that the cavity of the mold, in particular in the region of the fixing segment (1) and / or wiper lip segment (2) of the wiper blade to achieve , firstly decreases especially in the lateral direction (1) from one end in the longitudinal direction (L) towards the other end, to widen again in the lateral direction (1). 14 °) Method according to claim 11, characterized in that the cavity of the injection mold widens first in the vertical direction, particularly in the area of the attachment segment (1) and / or the lip segment wiping (2) of the wiper blade to be made from one end in the longitudinal direction (L) towards the other end, in particular in the vertical direction (y) to decrease again, in particular in the vertical direction (y). 15 °) A method according to claim 11, characterized in that the injection mold is a mold with several cavities for producing a plurality of wiper blades and in particular the multi-cavity mold is a stepped mold, in particular with cavities in two or several planes and / or the injection mold has modular cavities to produce wiper blades of different lengths with this mold.