Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/38—Wiper blades
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/001—Combinations of extrusion moulding with other shaping operations
  • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
  • B29C48/154—Coating solid articles, i.e. non-hollow articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
  • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
  • B29C48/19—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their edges
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
  • B29L2031/305—Wipers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/38—Wiper blades
  • B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
  • B60S2001/3829—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by the material of the squeegee or coating thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/38—Wiper blades
  • B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
  • B60S2001/3836—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by cross-sectional shape
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/38—Wiper blades
  • B60S2001/3898—Wiper blades method for manufacturing wiper blades

Definitions

• the invention is based on a method for producing a wiper strip according to the preamble of claim 1 and of a wiper strip according to the preamble of claim 10.
• a method for producing a wiper strip in which initially a double strand is extruded.
• the wiper strips are connected to the end faces on the narrow sides of their wiper lips.
• the double strand is separated longitudinally into two single strands.
• the coating after separation of the double strand is more complex because the individual strands must be performed separately in a coating system and coated. In contrast, in the case of coating before separation there is a risk that the wiping edges coming from the end face of the wiper lip
• EP 0 516 470 A1 discloses a manufacturing process for wiper strips in a double-strand process, wherein the double strand has broad, mutually opposite, V-shaped grooves on both sides of the common lip section, the grooves being produced during the extrusion of blades.
• the double strand can be easily divided into two single strands. Neither the double strand nor the single strands are subjected to a coating treatment.
• the distance of the end faces of the wiper lips in the double L 5 strhack outside the connection zone in the region of the wiping edges is greater than twice the thickness of the coating. This makes it possible to coat the wiping edges and part of the end faces before the separation process, without the wiping edges are deformed or damaged during the separation process. Furthermore, the end faces can be coated to the immediate vicinity of the connection zones. This has the advantage that direct contact between the uncoated part of the end face and the windshield is largely avoided when the wiper lip is moved during the wiping process in the spiral layers. As a result, a noise, e.g. Squeaks or rattles do not arise. Such noises are particularly to be feared when the uncoated rubber slides on the dry or almost dry vehicle window.
• connection zone 3 0 diverge the faces of the connection zone outward.
• connection zone is formed by a connecting web, which determines the minimum distance between the end faces and in the region of the connecting piece
• the mutually facing end faces of the wiper lips can be divergent outwards. run or form rectangular longitudinal grooves with parallel end faces, which form with the edges of the wiper lips in cross section substantially rectangular wiping edges.
• the method according to the invention can be further improved by first producing and coating the wiper lips in a double strand separately from the remaining parts of the wiper strip and then connecting them with the remaining parts of the wiper strip in a coextrusion process. It is expedient that the transition or connection zones between the wiper lips on the one hand and the other parts of the wiper strip on the other hand are provided in the region of abutment shoulders of the wiper lips.
• the duplex can be separated into two single strands, e.g. by hand or by means of two separating tools which engage in two mutually opposite first longitudinal grooves of the head strip and thus comprise a back strip of the head strip.
• the separating tools exert tensile forces acting on the double strand at the connection zone or connection point outwards to the longitudinal sides, which separate the double strand by tearing into two individual strands.
• a longitudinally extending central web is provided, which is connected by connecting zones in the form of connecting webs with the end faces, wherein the cross section of the connecting webs expediently decreases toward the end faces and in the areas on smallest, which adjoin the end faces of the wiper lips.
• the separation will take place directly on the end faces of the wiper lips. Since a tensile force acts at these points in the separation process, the elastic material retracts after separation to the center of the wiper lip, so that at the earlier junction of the uncoated part of the end face has a concave profile and thus during a wiping movement, the vehicle window in the reversal positions not touched.
• the head strip and the central web in a direction transverse to the longitudinal direction of the wiper lips plane the same extent. This is at the same time the largest extent of the double strand in this cattle tung. This ensures that the double strand is well guided in the feed direction during the manufacturing process, especially in the region of the wiping edges and the narrow end of the wiper lips.
• FIG. 1 shows a cross section of a double strand of wiper strips according to the invention
• FIG. 2 shows a variant of FIG. 1 before a coating
• FIG. 3 shows a double strand according to FIG. 2 after the coating
• FIG. 4 shows a double strand according to FIG. 3 after the separation into two single strands
• FIG. 5 shows a cross section of a single strand rotated by 90 degrees
• FIG. 6 shows an enlarged section corresponding to line VI in FIG. 5
• FIG. 7 shows a double strand according to FIG. 4 with two separating tools
• FIG. 8 shows a variant of a double strand according to FIG. 2 before coating with a central web between the single strands, FIG.
• FIG. 9 shows a double strand according to FIG. 8 after the coating
• Fig. 12 is a rotated by 90 degrees cross-section of a separate central web.
• Each wiper strip 10 has a head strip 14 with two first longitudinal grooves 20, which are open to the longitudinal sides and are separated from each other by a first longitudinal web 16. This connects a back bar 18 with the rest of the header.
• a tilting ridge 30 connects a wiper lip 28 with the head strip 14. Between the tilting ridge 30 and the head strip 14 support strips 22 are provided, which are formed by two opposing second longitudinal grooves 26. The second longitudinal grooves 26 are separated by a second longitudinal web 24. The wiper lip 28 has on the side facing away from the header 14 a narrow end 34. It widened to the tilting ridge 30, with which it is connected via a contact shoulder 32. In the wiping operation, the contact layer 32 attaches to one of the support strips 22, the system changing at the turning point of the wiping movement.
• two individual strands of the wiper strips 10 are mirror-symmetrically connected to each other in a connection zone 40 on mutually facing end faces 38 L 0.
• the end faces 38 diverge from the connecting zone 40 to the longitudinal sides of the narrow ends 34 of the wiper lips 28 and form wiping edges 36 with the longitudinal sides.
• the end faces 38 are formed so longitudinal grooves 43 which are open in the region of the wiping edges and there have a distance from each other which is greater than twice the layer thickness 60 of a coating applied after extrusion coating 46. After the coating, which extends to the connection zone 40 , the double strand 12 is separated into two single strands with the wiper strips 10.
• 2 0 can be done by cutting or pulling, by hand or by means of separator 50 in the direction of arrows 52 in Fig. 7.
• the double strand can be produced in a single extrusion process in which the entire wiper strips 10 are extruded in a double strand, or
• connection zone between the pre-extruded double strand of the wiper lips 28 is designated by 48 and is expediently located in the region of the plant.
• the exemplary embodiment according to FIGS. 2 to 6 differs from the exemplary embodiment according to FIG. 1 in that the connecting zone 40 is designed as a connecting web. On both sides of the web arise between the end faces 38 of the wiper lips 28 rectangular longitudinal grooves 44. In this case, the end faces 38 cut the Soflä-
• Wischkanten 36 result in practice with respect to the wiping quality and Durability have proven to be advantageous.
• the distance 58 of the end faces is also greater than twice the layer thickness 60, so that the connecting web 40 can be easily separated after the coating in the parting plane 42, without deforming and / or damaging the wiping edges 36.
• FIG. 2 shows an uncoated double strand 12
• FIG. 3 shows the same double strand 12 with a coating 46.
• the entire wiper strips 10 are coated, but it is also possible to carry out the coating 46 only on the wiper lips 28. It is also possible first to extrude and coat the wiper lips 28 in the double strand and then to join them in a coextrusion process with the other parts of the wiper strips 10.
• Fig. 4 shows a double strand 12 according to Fig. 3 after the separation. 56, the separating gap between the end faces 38 of the wiper lips 28 is designated.
• FIGS. 8 to 12 show a variant embodiment with a central web 54, which is connected between the end faces 38 by connecting webs 40 with the end faces 38. It corresponds in height to the height of the head strip 14, so that the double strand 12 is well supported and guided during the extrusion and the coating.
• the central web 54 is a waste product and is removed in the separation process of the double strand 12.
• the connecting webs 40 extend to the end faces 38 of the wiper lips 28 in a wedge shape, so that the demolition takes place at the end faces 38 during the separation process. Since the separation takes place under a tensile force, the rubber-elastic material is first stretched and contracts again after the separation. This results in a concave profile 62 of the end faces 38 at the uncoated points, so that the uncoated area of the end faces 38 does not come into contact with the vehicle window when the wiper lip 28 tips over during the wiping operation in the reversal position.
• FIG. 8 shows an uncoated double strand 12, while the double strand 12 according to FIG. 9 is coated.
• Fig. 10 shows the double strand 12 after separation into two single strands.
• FIGS. 11 and 12 show a wiper strip It is self-evident that individual construction elements, such as, for example, the coextrusion of the wiper lips prefabricated and coated in the double strand, are also used in the other exemplary embodiments in the exemplary embodiment according to FIG can.
• the diverging end faces 38 according to FIG. 1 can be combined with webs 40 according to FIGS. 2 and 3 or according to FIGS. 8 and 9.
• the double strands 12 can be coated completely or only in the region of the sealing lips in the different variants.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=48170490

Family Applications (1)

Country Status (2)

Families Citing this family (1)

Citations (11)

• 2012
  • 2012-06-14 DE DE102012209953A patent/DE102012209953A1/de not_active Ceased
• 2013
  • 2013-04-25 WO PCT/EP2013/058586 patent/WO2013185968A1/fr not_active Ceased

Patent Citations (12)

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