WO2009109248A1 - Method and device for producing a rubber-elastic wiper strip - Google Patents

Method and device for producing a rubber-elastic wiper strip Download PDF

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Publication number
WO2009109248A1
WO2009109248A1 PCT/EP2008/065677 EP2008065677W WO2009109248A1 WO 2009109248 A1 WO2009109248 A1 WO 2009109248A1 EP 2008065677 W EP2008065677 W EP 2008065677W WO 2009109248 A1 WO2009109248 A1 WO 2009109248A1
Authority
WO
WIPO (PCT)
Prior art keywords
wiper
strips
lips
knife
wiper lips
Prior art date
Application number
PCT/EP2008/065677
Other languages
German (de)
French (fr)
Inventor
Ludwig Vandermaesen
Jan Van Hoye
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2009109248A1 publication Critical patent/WO2009109248A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60SSERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00Cleaning of vehicles
    • B60S1/02Cleaning windscreens, windows or optical devices
    • B60S1/04Wipers or the like, e.g. scrapers
    • B60S1/32Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38Wiper blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/143Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/24Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with another disc cutter
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D11/00Combinations of several similar cutting apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/003Cutting work characterised by the nature of the cut made; Apparatus therefor specially adapted for cutting rubber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00Shaping techniques involving a cutting or machining operation
    • B29C2793/0063Cutting longitudinally
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60SSERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00Cleaning of vehicles
    • B60S1/02Cleaning windscreens, windows or optical devices
    • B60S1/04Wipers or the like, e.g. scrapers
    • B60S1/32Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38Wiper blades
    • B60S2001/3827Wiper blades characterised by the squeegee or blade rubber or wiping element
    • B60S2001/3836Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by cross-sectional shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60SSERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00Cleaning of vehicles
    • B60S1/02Cleaning windscreens, windows or optical devices
    • B60S1/04Wipers or the like, e.g. scrapers
    • B60S1/32Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38Wiper blades
    • B60S2001/3898Wiper blades method for manufacturing wiper blades

Definitions

  • the invention is based on a method according to the preamble of claim 1.
  • a wiper blade made of a silicone composition and a process for its preparation are known.
  • a continuous strand of curable elastomer is extruded through a die with a die opening shaped to form a duplex of wiper ledges joined together edge to edge at a center portion.
  • the middle section is carved by two opposing blades, which are fastened to the matrix in the area of the die opening.
  • the double strand is divided along the scribed line by a nip roll. Instead of the nip rolls, the double strand profile can be separated by a circular blade.
  • the wiper strips are cut in the transverse direction with a conventional cutting device to the finished use length.
  • US 4,103,385 a similar method for producing rubber-elastic wiper strips is known, in which the double-profile strand is cut by suitable rotating blades in the longitudinal direction.
  • DE 693 24 368 T2 discloses a method for producing a rubber-elastic wiper strip in which a double-stranded profile is incised longitudinally in the region of the mutually connected wiper lips from both sides with rotating knives, so that it can be torn apart after the coating.
  • the double-stranded profile after its coating is mounted on a support and separated longitudinally by pressing a long knife blade longitudinally against the central portion of the common lip portion.
  • both wiper strips of the double extruded profile are guided in the transport direction at least a little way in front of the knife to a point far behind the knife on both flanks of their wiper lips. Due to the safe guidance in the area of the knife or the knife, the wiper lip can not be deflected by the blade of the knife. This results in smooth clean cuts that produce high quality wiping edges on the wiper lips of the wiper blades. These can be used to achieve good wiping results. Furthermore, the quality differences in a large series are extremely low. In the case of the double extruded profile, the narrow sides of the wiper lips can be connected to one another directly or indirectly via a support web.
  • a guide and support of the wiper lips in the vicinity of the knife or the knife is sufficient.
  • the result can be improved by additionally guiding and supporting the wiper strips on their head strips and / or on their support strips which are provided between the wiper lips and the head strips.
  • wiper lips it may be advantageous to sever wiper lips in a single cutting operation or incise from both sides to a predetermined depth and to separate by tearing apart in the course of further handling of the wiper strips.
  • the double-stranded profile is conveyed vibration-free and continuously, at least in the area of the knife or the knife. It is therefore expedient to provide a toothed belt transport on both sides of the blade or the knife, against which the double-stranded profile is pressed by pressing rollers. This minimizes the negative effects of the elastic material on a uniform cutting speed. This is facilitated by the fact that the leadership of the double-strand profile is designed so that in the cutting zone, a slight tensile stress is generated transversely to the longitudinal direction of the double-strand profile to the outside. By clamping a very accurate guidance is also achieved.
  • a device which has a guide for receiving the double strand of the wiper strips, which is divided in the longitudinal direction into an upper and lower guide.
  • the leadership forms rule their parts receiving spaces that are adapted to the outer contour of the wiper strips, so that the flanks of the wiper lips of the wiper strips are each narrowly guided between two support edges.
  • contact shoulders can be provided for guiding and supporting the wiper strips, which prevents tilting movements of the wiper strips about their longitudinal axis.
  • the same purpose serves a lateral guidance of the header within the receiving space.
  • 1 is a schematic representation of an apparatus for cutting a double wiper strip profile in the longitudinal direction
  • FIG. 2 shows a partial cross section according to line II-II
  • FIG. 3 shows an enlarged cross section of a double wiper strip profile
  • FIG. 4 shows a variant of FIG. 1,
  • FIG. 5 shows a section along the line VV in Fig. 4
  • Fig. 6 is an enlarged section corresponding to the line
  • FIG. 7 shows a variant of FIG. 1
  • FIG. 8 shows a view in the transport direction
  • FIG. 9 shows an enlarged detail corresponding to FIG
  • Fig. 10 is a variant of FIG. 1
  • Fig. 11 is a section along the line XI-XI in Fig. 10
  • Fig. 12 is an enlarged section corresponding to the line
  • the device 10 shown in Fig. 1 is used for separating a double-strand profile of FIG. 3.
  • the double-strand profile consists of two wiper strips 72, the wiper lips 82 facing each other.
  • the wiper lips 82 have a wedge-shaped cross-sectional profile, the narrow sides 86 are connected directly or indirectly via a support web. To the opposite side widens the cross-sectional profile and forms lateral shoulders 84. Between these and the narrow side 86 extend concave flanks 88.
  • the wiper lips 82 are each connected via a tilting ridge 80 with a header 74, wherein between the header 74 and the tilting ridge 80, a support strip 76 is arranged, which is connected via a web 78 on the header 74.
  • the wiper lip 82 engages alternately with a shoulder 84 on an associated support strip 76.
  • the wiper strips 72 are made as a double-strand profile, they are divided in the device 10 in the longitudinal direction.
  • the device 10 has a transport device in the form of two toothed belt transports 60, on which the double-strand profile is deposited with a longitudinal side of its head strips 74, and against which it is pressed by pressure rollers 14.
  • the contact pressure of the pressure rollers 14, which are mounted in a respective stator 12, can be adjusted by an adjusting mechanism 16.
  • the toothed belt transport 60 transports the double strand of the wiper strips 72 by a guide, which is composed of an upper guide 40 and a lower guide 42 and forms a receiving space 50 for the double strand of the wiper strips 72 between their parts 40 and 42.
  • a longitudinal side of the receiving space 50 is bounded in each case by a toothed belt transport 60 against which the head strip 74 of the wiper strip 72 rests.
  • the upper guide 40 and the lower guide 42 are adapted to the outer contour of the wiper strips 72, so that they are closely guided, in particular in the region of the wiper lips 82.
  • the receiving space 50 in the region of the wiper lips 82 supporting edges 46, 48 which abut respectively opposite flanks 88 of the wiper lip 82.
  • the wiper strip 72 can bear against its support strips 76 against abutment shoulders 52, 54 of the guide 40, 42. With a corresponding design of the support shoulders 52, 54 in the transport direction 62 on the wiper lips 82 a low tensile force can be applied to the outside via the support strips 76.
  • the support edges 48 and the Ania shoulder 54 are formed on the side of the toothed belt transports 60 on a guide insert 44. This one is from the side of the double strand of the wiper strips 72 inserted into the lower guide 42.
  • the cutting edges 22, 24 each have a plane shear surface 26, 28 which lies in the longitudinal center plane, while the cutting surfaces 30, 32 extend at an acute angle to the shear surfaces 26, 28, so that slender, sharp cutting edges 22, 24 result.
  • the knives 18, 20 are circular in shape and overlap with their shear surfaces 26, 28 according to the material thickness of the wiper lips 82 on their narrow sides 86.
  • the knives 18 and 20 may be rotating knives whose rotational movement is tuned to the transport speed of the toothed belt transports 60 especially if they have their own drive. But there is also the possibility that the blades 18 and 20 are arranged stationary, wherein the cutting area in dependence of the wear of the knife
  • the shear surface 28 of the knife 20 is pressed against the shear surface 26 of the knife 18.
  • FIGS. 4 to 6 differs from the exemplary embodiment according to FIGS. 1 to 3 in that the two circular knives 64, 68 have symmetrical cutting edges 66, 70, the centers of the knives 64, 68 lying in a common transverse plane, which is perpendicular to the transport direction 62.
  • the knives 64, 68 are arranged relative to each other so that they cut the wiper lips 82 to a certain depth, but not cut.
  • the complete separation of the wiper strips 72 takes place in the course of subsequent further treatment or assembly of the wiper strips 72nd
  • the embodiment 7 to 9 differs from the exemplary embodiment according to FIGS. 4 to 6 in that the circular knives 64, 68 are arranged offset to one another in the transport direction 62, so that the narrow side 86 of the wiper lip 82 moves first from the lower side through the Knife 68 and then cut by the knife 64 from the other side or cut through.
  • FIGS. 10 to 12 is a single bar kenförmiges knife 92, z.
  • the cutting edge 94 is approximately perpendicular to the wiper lips 82, wherein the cutting edge 94 opposite to the transport direction 62 has.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Tyre Moulding (AREA)

Abstract

The invention relates to a method for producing a rubber-elastic wiper strip (72) which is produced as a double profile strand in a first process step, the wiper strips (72) facing each other with their wiper lips (82) and being interconnected on the small faces (86) thereof indirectly via a supporting web or directly, and the double profile strand is cut in a second process step in a longitudinal center plane perpendicular to the wiper lips (82) against the direction of transport (62) of the wiper strips (72) by means of at least one knife (18, 20, 64, 68, 92). The method is characterized in that the two wiper strips (72) are guided in the direction of transport (62) at least some distance before the knife (18, 20, 64, 68, 92) to a point some distance behind the knife (18, 20, 64, 68, 92) on both flanks (88) of their wiper lips (82).

Description

Verfahren und Vorrichtung zum Herstellen einer gummielasti- schen WischleisteMethod and device for producing a rubber-elastic wiper strip
Stand der TechnikState of the art
Die Erfindung geht von einem Verfahren nach dem Oberbegriff des Anspruchs 1 aus.The invention is based on a method according to the preamble of claim 1.
Aus der DE 692 17 121 T2 sind ein Wischblatt aus einer Silikonzusammensetzung und ein Verfahren zu seiner Herstellung bekannt. Bei dem Verfahren wird ein kontinuierlicher Strang eines härtbaren Elastomers durch eine Pressmatrize mit einer Matrizenöffnung extrudiert, die so geformt ist, dass ein Doppelstrang von Wischleisten entsteht, die an einem Mittelabschnitt Kante an Kante miteinander verbunden sind. Der Mittelabschnitt wird durch zwei einander gegenüberliegende Klingen eingeritzt, die an der Matrize im Bereich der Matrizenöffnung befestigt sind. Nach einem Vulkanisiervorgang wird der Doppelstrang längs der eingeritzten Linie durch eine Quetschwalze geteilt. Anstatt durch die Quetschwalzen kann das Doppelstrangprofil durch eine kreisförmige Klinge getrennt werden. Nach dem Trennen werden die Wischleisten in Querrichtung mit einer herkömmlichen Schneideinrichtung auf die fertige Gebrauchslänge geschnitten. Aus der US 4 103 385 ist ein ähnliches Verfahren zum Herstellen von gummielastischen Wischleisten bekannt, bei dem der Doppelprofilstrang durch geeignete rotierende Messer in Längsrichtung geschnitten wird.From DE 692 17 121 T2 a wiper blade made of a silicone composition and a process for its preparation are known. In the process, a continuous strand of curable elastomer is extruded through a die with a die opening shaped to form a duplex of wiper ledges joined together edge to edge at a center portion. The middle section is carved by two opposing blades, which are fastened to the matrix in the area of the die opening. After a vulcanization process, the double strand is divided along the scribed line by a nip roll. Instead of the nip rolls, the double strand profile can be separated by a circular blade. After separation, the wiper strips are cut in the transverse direction with a conventional cutting device to the finished use length. From US 4,103,385 a similar method for producing rubber-elastic wiper strips is known, in which the double-profile strand is cut by suitable rotating blades in the longitudinal direction.
Aus der DE 693 24 368 T2 ist ein Verfahren zum Herstellen einer gummielastischen Wischleiste bekannt, bei dem ein Doppelstrangprofil im Bereich der miteinander verbundenen Wischlippen von beiden Seiten mit rotierenden Messern in Längsrich- tung eingeritzt wird, sodass es nach dem Beschichten auseinander gerissen werden kann. Bei einem konventionellen Verfahren wird das Doppelstrangprofil nach seiner Beschichtung auf einen Träger montiert und in Längsrichtung getrennt, indem eine lange Messerklinge in Längsrichtung gegen den Mittelab- schnitt des gemeinsamen Lippenabschnitts gedrückt wird.DE 693 24 368 T2 discloses a method for producing a rubber-elastic wiper strip in which a double-stranded profile is incised longitudinally in the region of the mutually connected wiper lips from both sides with rotating knives, so that it can be torn apart after the coating. In a conventional method, the double-stranded profile after its coating is mounted on a support and separated longitudinally by pressing a long knife blade longitudinally against the central portion of the common lip portion.
Offenbarung der ErfindungDisclosure of the invention
Nach der Erfindung werden beide Wischleisten des Doppel- Strangprofils in der Transportrichtung mindestens ein Stück weit vor dem Messer bis ein Stück weit hinter dem Messer an jeweils beiden Flanken ihrer Wischlippen geführt. Durch die sichere Führung im Bereich des Messers bzw. der Messer kann die Wischlippe nicht von der Schneide des Messers abgelenkt werden. Dadurch ergeben sich glatte saubere Schnitte, die an den Wischlippen der Wischleisten qualitativ hochwertige Wischkanten erzeugen. Mit diesen lassen sich gute Wischergebnisse erzielen. Ferner sind die Qualitätsunterschiede in einer Großserie äußerst gering. Bei dem Doppelstrangprofil kön- nen die schmalen Seiten der Wischlippen unmittelbar oder mittelbar über einen Stützsteg miteinander verbunden sein. In der Regel reicht eine Führung und Abstützung der Wischlippen in der Nähe des Messers bzw. der Messer aus. Das Ergebnis kann jedoch dadurch verbessert werden, dass die Wischleisten zusätzlich an ihren Kopfleisten und/oder an ihren Stützleis- ten geführt und gestützt werden, die zwischen den Wischlippen und den Kopfleisten vorgesehen sind.According to the invention, both wiper strips of the double extruded profile are guided in the transport direction at least a little way in front of the knife to a point far behind the knife on both flanks of their wiper lips. Due to the safe guidance in the area of the knife or the knife, the wiper lip can not be deflected by the blade of the knife. This results in smooth clean cuts that produce high quality wiping edges on the wiper lips of the wiper blades. These can be used to achieve good wiping results. Furthermore, the quality differences in a large series are extremely low. In the case of the double extruded profile, the narrow sides of the wiper lips can be connected to one another directly or indirectly via a support web. In general, a guide and support of the wiper lips in the vicinity of the knife or the knife is sufficient. However, the result can be improved by additionally guiding and supporting the wiper strips on their head strips and / or on their support strips which are provided between the wiper lips and the head strips.
Je nach den folgenden Bearbeitungsvorgängen der Wischlippen kann es vorteilhaft sein, Wischlippen in einem einzigen Schneidvorgang zu durchtrennen oder von beiden Seiten bis zu einer vorgegebenen Tiefe einzuschneiden und im Zuge der weiteren Handhabung der Wischleisten durch Reißen von einander zu trennen.Depending on the subsequent machining operations of the wiper lips, it may be advantageous to sever wiper lips in a single cutting operation or incise from both sides to a predetermined depth and to separate by tearing apart in the course of further handling of the wiper strips.
Für die Qualität des Trennschnitts ist es von großer Bedeutung, dass das Doppelstrangprofil zumindest im Bereich des Messers bzw. der Messer schwingungsfrei und kontinuierlich gefördert wird. Es ist daher zweckmäßig, zu beiden Seiten des Messers bzw. der Messer einen Zahnriementransport vorzusehen, gegen den das Doppelstrangprofil durch Anpressrollen gedrückt wird. Dadurch werden die negativen Einflüsse des elastischen Materials auf eine gleichmäßige Schnittgeschwindigkeit minimiert. Dies wird noch dadurch begünstigt, wenn die Führung des Doppelstrangprofils so ausgelegt ist, dass in der Schneidzone eine geringfügige Zugspannung quer zur Längsrichtung des Doppelstrangprofils nach außen erzeugt wird. Durch die Aufspannung wird ferner eine sehr genaue Führung erzielt.For the quality of the separating cut, it is of great importance that the double-stranded profile is conveyed vibration-free and continuously, at least in the area of the knife or the knife. It is therefore expedient to provide a toothed belt transport on both sides of the blade or the knife, against which the double-stranded profile is pressed by pressing rollers. This minimizes the negative effects of the elastic material on a uniform cutting speed. This is facilitated by the fact that the leadership of the double-strand profile is designed so that in the cutting zone, a slight tensile stress is generated transversely to the longitudinal direction of the double-strand profile to the outside. By clamping a very accurate guidance is also achieved.
Zum Durchführen des Verfahrens dient zweckmäßigerweise eine Vorrichtung, die zur Aufnahme des Doppelstrangs der Wischleisten eine Führung besitzt, die in Längsrichtung in eine obere und untere Führung geteilt ist. Die Führung bildet zwi- schen ihren Teilen Aufnahmeräume, die der Außenkontur der Wischleisten angepasst sind, sodass die Flanken der Wischlippen der Wischleisten jeweils zwischen zwei Stützrändern eng geführt sind. Zusätzlich können Anlageschultern für die Füh- rung und zum Stützen der Wischleisten vorgesehen werden, wodurch Kippbewegungen der Wischleisten um ihre Längsachse verhindert werden. Dem gleichen Zweck dient eine seitliche Führung der Kopfleiste innerhalb des Aufnahmeraums. Weitere Vorteile ergeben sich aus der nachfolgenden Beschreibung der Ausführungsbeispiele.For carrying out the method expediently a device which has a guide for receiving the double strand of the wiper strips, which is divided in the longitudinal direction into an upper and lower guide. The leadership forms rule their parts receiving spaces that are adapted to the outer contour of the wiper strips, so that the flanks of the wiper lips of the wiper strips are each narrowly guided between two support edges. In addition, contact shoulders can be provided for guiding and supporting the wiper strips, which prevents tilting movements of the wiper strips about their longitudinal axis. The same purpose serves a lateral guidance of the header within the receiving space. Further advantages will become apparent from the following description of the embodiments.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen .Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
Es zeigen:Show it:
Fig. 1 eine schematische Darstellung einer Vorrichtung zum Schneiden eines Doppelwischleistenprofils in Längsrichtung,1 is a schematic representation of an apparatus for cutting a double wiper strip profile in the longitudinal direction,
Fig. 2 einen Teilquerschnitt entsprechend der Linie II-II, Fig. 3 einen vergrößerten Querschnitt eines Doppelwischleis- tenprofils,2 shows a partial cross section according to line II-II, FIG. 3 shows an enlarged cross section of a double wiper strip profile,
Fig. 4 eine Variante zur Fig. 1,4 shows a variant of FIG. 1,
Fig. 5 einen Schnitt entsprechend der Linie V-V in Fig. 4, Fig. 6 einen vergrößerten Ausschnitt entsprechend der Linie5 shows a section along the line VV in Fig. 4, Fig. 6 is an enlarged section corresponding to the line
VI in Fig. 5,VI in Fig. 5,
Fig. 7 eine Variante zur Fig. 1, Fig. 8 eine Ansicht in Transportrichtung, Fig. 9 einen vergrößerten Ausschnitt entsprechend der7 shows a variant of FIG. 1, FIG. 8 shows a view in the transport direction, FIG. 9 shows an enlarged detail corresponding to FIG
Linie IX,Line IX,
Fig. 10 eine Variante zur Fig. 1, Fig. 11 einen Schnitt entsprechend der Linie XI-XI in Fig. 10 und Fig. 12 einen vergrößerten Ausschnitt entsprechend der LinieFig. 10 is a variant of FIG. 1, Fig. 11 is a section along the line XI-XI in Fig. 10 and Fig. 12 is an enlarged section corresponding to the line
XII in Fig. 11XII in Fig. 11
Ausführungsformen der ErfindungEmbodiments of the invention
Die in Fig. 1 dargestellte Vorrichtung 10 dient zum Trennen eines Doppelstrangprofils nach Fig. 3. Das Doppelstrangprofil besteht aus zwei Wischleisten 72, deren Wischlippen 82 einander zugewandt sind. Die Wischlippen 82 besitzen ein keilförmiges Querschnittprofil, deren schmale Seiten 86 unmittelbar oder mittelbar über einen Stützsteg miteinander verbunden sind. Zur gegenüberliegenden Seite verbreitert sich das Querschnittprofil und bildet seitliche Schultern 84. Zwischen diesen und der schmalen Seite 86 erstrecken sich konkav geformte Flanken 88. Die Wischlippen 82 sind jeweils über einen Kippsteg 80 mit einer Kopfleiste 74 verbunden, wobei zwischen der Kopfleiste 74 und dem Kippsteg 80 eine Stützleiste 76 angeordnet ist, die über einen Steg 78 an der Kopfleiste 74 angeschlossen ist. Bei der Wischbewegung legt sich die Wischlippe 82 wechselweise mit einer Schulter 84 an einer zugeord- neten Stützleiste 76 an. Nachdem die Wischleisten 72 als Doppelstrangprofil gefertigt sind, werden sie in der Vorrichtung 10 in Längsrichtung geteilt. Hierzu besitzt die Vorrichtung 10 eine Transporteinrichtung in Form zweier Zahnriementransporte 60, auf die das Doppelstrangprofil mit einer Längsseite seiner Kopfleisten 74 abgelegt wird, und gegen die es durch Anpressrollen 14 gedrückt wird. Der Anpressdruck der Andrückrollen 14, die in jeweils einem Ständer 12 gelagert sind, kann durch einen Verstellmechanismus 16 eingestellt werden.The device 10 shown in Fig. 1 is used for separating a double-strand profile of FIG. 3. The double-strand profile consists of two wiper strips 72, the wiper lips 82 facing each other. The wiper lips 82 have a wedge-shaped cross-sectional profile, the narrow sides 86 are connected directly or indirectly via a support web. To the opposite side widens the cross-sectional profile and forms lateral shoulders 84. Between these and the narrow side 86 extend concave flanks 88. The wiper lips 82 are each connected via a tilting ridge 80 with a header 74, wherein between the header 74 and the tilting ridge 80, a support strip 76 is arranged, which is connected via a web 78 on the header 74. During the wiping movement, the wiper lip 82 engages alternately with a shoulder 84 on an associated support strip 76. After the wiper strips 72 are made as a double-strand profile, they are divided in the device 10 in the longitudinal direction. For this purpose, the device 10 has a transport device in the form of two toothed belt transports 60, on which the double-strand profile is deposited with a longitudinal side of its head strips 74, and against which it is pressed by pressure rollers 14. The contact pressure of the pressure rollers 14, which are mounted in a respective stator 12, can be adjusted by an adjusting mechanism 16.
Der Zahnriementransport 60 transportiert den Doppelstrang der Wischleisten 72 durch eine Führung, die aus einer oberen Führung 40 und einer unteren Führung 42 zusammengesetzt ist und zwischen ihren Teilen 40 und 42 einen Aufnahmeraum 50 für den Doppelstrang der Wischleisten 72 bildet. Eine Längsseite des Aufnahmeraums 50 wird jeweils durch einen Zahnriementransport 60 begrenzt, an dem die Kopfleiste 74 der Wischleiste 72 anliegt. Die obere Führung 40 und die untere Führung 42 sind der Außenkontur der Wischleisten 72 angepasst, sodass diese insbesondere im Bereich der Wischlippen 82 eng geführt sind. Zu diesem Zweck weist der Aufnahmeraum 50 im Bereich der Wischlippen 82 Stützränder 46, 48 auf, die jeweils an gegenüberliegenden Flanken 88 der Wischlippe 82 anliegen. Zusätzlich kann sich die Wischleiste 72 über ihre Stützleisten 76 gegen Anlageschultern 52, 54 der Führung 40, 42 anlegen. Über die Stützleisten 76 kann bei entsprechender Gestaltung der Stützschultern 52, 54 in Transportrichtung 62 auf die Wischlippen 82 eine geringe Zugkraft nach außen aufgebracht werden. Zweckmäßigerweise sind die Stützränder 48 und die AnIa- geschultem 54 auf der Seite der Zahnriementransporte 60 an einem Führungseinsatz 44 angeformt. Dieser wird von der Seite des Doppelstrangs der Wischleisten 72 in die untere Führung 42 eingesetzt.The toothed belt transport 60 transports the double strand of the wiper strips 72 by a guide, which is composed of an upper guide 40 and a lower guide 42 and forms a receiving space 50 for the double strand of the wiper strips 72 between their parts 40 and 42. A longitudinal side of the receiving space 50 is bounded in each case by a toothed belt transport 60 against which the head strip 74 of the wiper strip 72 rests. The upper guide 40 and the lower guide 42 are adapted to the outer contour of the wiper strips 72, so that they are closely guided, in particular in the region of the wiper lips 82. For this purpose, the receiving space 50 in the region of the wiper lips 82 supporting edges 46, 48 which abut respectively opposite flanks 88 of the wiper lip 82. In addition, the wiper strip 72 can bear against its support strips 76 against abutment shoulders 52, 54 of the guide 40, 42. With a corresponding design of the support shoulders 52, 54 in the transport direction 62 on the wiper lips 82 a low tensile force can be applied to the outside via the support strips 76. Conveniently, the support edges 48 and the Ania shoulder 54 are formed on the side of the toothed belt transports 60 on a guide insert 44. This one is from the side of the double strand of the wiper strips 72 inserted into the lower guide 42.
In einer Längsmittelebene zwischen den Wischleisten 72 sind Messer 18, 20 mit Schneiden 22, 24 vorgesehen, die durch Öffnungen 56, 58 in den Bereich der schmalen Seiten 86 der Wischlippen 82 reichen. Die Schneiden 22, 24 besitzen jeweils eine ebene Scherfläche 26, 28, die in der Längsmittelebene liegt, während die Schneidflächen 30, 32 unter einem spitzen Winkel zu den Scherflächen 26, 28 verlaufen, sodass sich schlanke, scharfe Schneiden 22, 24 ergeben. Die Messer 18, 20 sind kreisförmig gestaltet und überlappen sich mit ihren Scherflächen 26, 28 entsprechend der Materialstärke der Wischlippen 82 an ihren schmalen Seiten 86. Dabei können die Messer 18 und 20 rotierende Messer sein, deren Rotationsbewegung auf die Transportgeschwindigkeit der Zahnriementransporte 60 abgestimmt ist, insbesondere wenn sie einen eigenen Antrieb besitzen. Es besteht aber auch die Möglichkeit, dass die Messer 18 und 20 ortsfest angeordnet sind, wobei der Schneidbereich in Abhängigkeit des Verschleißes der MesserIn a longitudinal center plane between the wiper strips 72 are knives 18, 20 provided with cutting edges 22, 24 which extend through openings 56, 58 in the region of the narrow sides 86 of the wiper lips 82. The cutting edges 22, 24 each have a plane shear surface 26, 28 which lies in the longitudinal center plane, while the cutting surfaces 30, 32 extend at an acute angle to the shear surfaces 26, 28, so that slender, sharp cutting edges 22, 24 result. The knives 18, 20 are circular in shape and overlap with their shear surfaces 26, 28 according to the material thickness of the wiper lips 82 on their narrow sides 86. The knives 18 and 20 may be rotating knives whose rotational movement is tuned to the transport speed of the toothed belt transports 60 especially if they have their own drive. But there is also the possibility that the blades 18 and 20 are arranged stationary, wherein the cutting area in dependence of the wear of the knife
18, 20 verstellt werden kann. Die Scherfläche 28 des Messers 20 wird gegen die Scherfläche 26 des Messers 18 gedrückt.18, 20 can be adjusted. The shear surface 28 of the knife 20 is pressed against the shear surface 26 of the knife 18.
Das Ausführungsbeispiel nach Fig. 4 bis 6 unterscheidet sich von dem Ausführungsbeispiel nach Fig. 1 bis 3 dadurch, dass die zwei kreisförmigen Messer 64, 68 symmetrische Schneiden 66, 70 aufweisen, wobei die Mitten der Messer 64, 68 in einer gemeinsamen Querebene liegen, die senkrecht zur Transportrichtung 62 verläuft. Die Messer 64, 68 sind so zueinander angeordnet, dass sie die Wischlippen 82 bis auf eine bestimmte Tiefe einschneiden, aber nicht durchschneiden. Die vollständige Trennung der Wischleisten 72 erfolgt im Laufe der nachfolgenden Weiterbehandlung bzw. Montage der Wischleisten 72.The embodiment according to FIGS. 4 to 6 differs from the exemplary embodiment according to FIGS. 1 to 3 in that the two circular knives 64, 68 have symmetrical cutting edges 66, 70, the centers of the knives 64, 68 lying in a common transverse plane, which is perpendicular to the transport direction 62. The knives 64, 68 are arranged relative to each other so that they cut the wiper lips 82 to a certain depth, but not cut. The complete separation of the wiper strips 72 takes place in the course of subsequent further treatment or assembly of the wiper strips 72nd
Das Ausführungsbeispiel 7 bis 9 unterscheidet sich von dem Ausführungsbeispiel nach Fig. 4 bis Fig. 6 dadurch, dass die kreisförmigen Messer 64, 68 in Transportrichtung 62 zueinander versetzt angeordnet sind, sodass die schmale Seite 86 der Wischlippe 82 zunächst von der unteren Seite durch das Messer 68 und darauf durch das Messer 64 von der anderen Seite ein- geschnitten bzw. durchgeschnitten wird.The embodiment 7 to 9 differs from the exemplary embodiment according to FIGS. 4 to 6 in that the circular knives 64, 68 are arranged offset to one another in the transport direction 62, so that the narrow side 86 of the wiper lip 82 moves first from the lower side through the Knife 68 and then cut by the knife 64 from the other side or cut through.
In der Ausführung nach Fig. 10 bis 12 ist ein einzelnes bal- kenförmiges Messer 92, z. B. eine Rasierklinge, vorgesehen, dessen Schneide 94 etwa senkrecht zu den Wischlippen 82 steht, wobei die Schneide 94 entgegengesetzt zur Transportrichtung 62 weist. In the embodiment of FIGS. 10 to 12 is a single bar kenförmiges knife 92, z. As a razor, provided, the cutting edge 94 is approximately perpendicular to the wiper lips 82, wherein the cutting edge 94 opposite to the transport direction 62 has.

Claims

Ansprüche claims
1. Verfahren zum Herstellen einer gummielastischen Wischleiste (72), die in einem ersten Verfahrensschritt als Doppelprofilstrang hergestellt wird, wobei die Wischleisten (72) mit ihren Wischlippen (82) einander zugewandt und an deren schmalen Seiten (86) mittelbar über einen Stützsteg oder unmittelbar miteinander verbunden sind und der Doppelprofilstrang in einem zweiten Verfahrensschritt durch mindestens ein Messer (18, 20, 64, 68, 92) in einer Längsmittelebene quer zu den Wischlippen (82) insbesondere entgegen einer Transportrichtung (62) der Wischleisten (72) geschnitten wird, dadurch gekennzeichnet, dass beide Wischleisten (72) in der Transportrichtung (62) mindestens ein Stück weit vor dem Messer (18, 20, 64, 68, 92) bis ein Stück weit hinter dem Messer (18, 20, 64, 68, 92) an jeweils beiden Flanken (88) ihrer Wischlippen (82) geführt werden.1. A method for producing a rubber-elastic wiper strip (72), which is produced in a first process step as a double-profile strand, wherein the wiper strips (72) with their wiper lips (82) facing each other and on the narrow sides (86) indirectly via a support web or directly connected to each other and the double profile strand in a second process step by at least one knife (18, 20, 64, 68, 92) in a longitudinal center plane transverse to the wiper lips (82) in particular against a transport direction (62) of the wiper strips (72) is cut characterized in that both wiper strips (72) in the transport direction (62) at least a little way in front of the knife (18, 20, 64, 68, 92) to a point far behind the knife (18, 20, 64, 68, 92 ) are guided on each of two flanks (88) of their wiper lips (82).
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Wischleisten (72) zusätzlich zu ihren Wischlippen (82) an ihren Kopfleisten (74) geführt werden.2. The method according to claim 1, characterized in that the wiper strips (72) in addition to their wiper lips (82) on their head strips (74) are guided.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Wischleisten (72) zusätzlich an Stützleisten3. The method according to claim 1 or 2, characterized in that the wiper strips (72) in addition to support strips
(76) geführt werden, die zwischen den Wischlippen (82) und den Kopfleisten (74) vorgesehen sind. (76) which are provided between the wiper lips (82) and the head strips (74).
4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Wischlippen (82) in einem einzigen Schneidevorgang durchtrennt werden.4. The method according to any one of the preceding claims, characterized in that the wiper lips (82) are severed in a single cutting operation.
5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Wischlippen (82) von beiden Seiten bis zu einer vorgegebenen Tiefe eingeschnitten werden.5. The method according to any one of claims 1 to 3, characterized in that the wiper lips (82) are cut from both sides to a predetermined depth.
6. Verfahren nach einem der vorhergehenden Ansprüche, da- durch gekennzeichnet, dass ein Zahnriementransport (60) den6. The method according to any one of the preceding claims, character- ized in that a toothed belt conveyor (60) the
Doppelprofilstrang der Wischleisten (72) in Transportrichtung (62) relativ zu den Messern bewegt.Double profile strand of the wiper strips (72) in the transport direction (62) moves relative to the knives.
7. Verfahren nach einem der vorhergehenden Ansprüche, da- durch gekennzeichnet, dass im Bereich der Messer (18, 20, 64,7. Method according to one of the preceding claims, characterized in that in the region of the knives (18, 20, 64,
68, 92) auf die Wischlippen (82) eine geringe Zugspannung nach außen wirkt.68, 92) acts on the wiper lips (82) has a low tensile stress to the outside.
8. Vorrichtung (10) zum Durchführen des Verfahrens nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zur Aufnahme des Doppelprofilstrangs der Wischleisten (72) eine obere Führung (40) und eine untere Führung (42) vorgesehen sind, die zwischen sich Aufnahmeräume (50) für die Führung der Wischleisten (72) bilden, die der Außenkontur der Wischleisten (72) angepasst sind, und dass jeweils eine Seite der Aufnahmeräume (50) von einem Transport, insbesondere einem Zahnriementransport gebildet wird, gegen den der Doppelprofilstrang durch Andrückrollen gedrückt wird, wobei das Messer (18, 20, 64, 68, 92) mit seinen Schneiden (22, 24, 66, 70, 94) in einer Längsmittelebene des Doppelprofilstrangs senkrecht zu den Wischlippen (82) angeordnet ist und die Wischlippen (82) sich mit ihren Flanken (88) an Stützerändern (46, 48) der Führung (40, 42) nahe dem Messer (18, 20, 64, 68, 92) abstützen, das durch Öffnungen (56, 58) in der Führung (40, 42) in den Bereich der Wischlippen (82) reicht.8. Device (10) for carrying out the method according to one of the preceding claims, characterized in that for receiving the double-profile strand of the wiper strips (72) an upper guide (40) and a lower guide (42) are provided, which between them receiving spaces ( 50) for guiding the wiper strips (72), which are adapted to the outer contour of the wiper strips (72), and that in each case one side of the receiving spaces (50) is formed by a transport, in particular a toothed belt transport, pressed against the double profile strand by pressure rollers in which the knife (18, 20, 64, 68, 92) is arranged with its cutting edges (22, 24, 66, 70, 94) in a longitudinal center plane of the double profile strand perpendicular to the wiper lips (82) and the wiper lips (82) with their flanks (88) change to Stützer (46, 48) of the guide (40, 42) near the knife (18, 20, 64, 68, 92) supported by openings (56, 58) in the guide (40, 42) in the region of the wiper lips ( 82) is enough.
9. Vorrichtung (10) nach Anspruch 8, dadurch gekennzeichnet, dass die Aufnahmeräume (50) Anlageschultern (52, 54) aufweisen, an denen die Stützleisten (76) der Wischleisten (72) geführt sind.9. Device (10) according to claim 8, characterized in that the receiving spaces (50) abutment shoulders (52, 54), on which the support strips (76) of the wiper strips (72) are guided.
10. Vorrichtung (10) nach Anspruch 9, dadurch gekennzeichnet, dass die Anlageschultern (54) und die Stützränder (48) auf der Seite des Zahnriementransports (60) durch einen Führungseinsatz (44) gebildet werden.10. Device (10) according to claim 9, characterized in that the abutment shoulders (54) and the support edges (48) on the side of the toothed belt transport (60) by a guide insert (44) are formed.
11. Vorrichtung (10) nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass die Aufnahmeräume (50) die Kopfleisten (74) an ihren Längsseiten führen.11. Device (10) according to any one of claims 8 to 10, characterized in that the receiving spaces (50) guide the head strips (74) on their longitudinal sides.
12. Vorrichtung (10) nach einem der Ansprüche 8 bis 11, da- durch gekennzeichnet, dass zwei Messer (18, 20) kreisförmige12. Device (10) according to any one of claims 8 to 11, character- ized in that two knives (18, 20) circular
Schneiden (22, 24) haben, die sich im Bereich der Wischlippen (82) überlappen.Have cutting edges (22, 24), which overlap in the region of the wiper lips (82).
13. Vorrichtung (10) nach einem der Ansprüche 8 bis 11, da- durch gekennzeichnet, dass zwei Messer (64, 68) so angeordnet sind, dass ihre Schneiden (66, 70) die Wischlippen (82) von beiden Seiten bis zu einer vorgegebenen Tiefe einschneiden.13. Device (10) according to any one of claims 8 to 11, character- ized in that two knives (64, 68) are arranged so that their cutting edges (66, 70), the wiper lips (82) from both sides to a cut in given depth.
14. Vorrichtung (10) nach Anspruch 13, dadurch gekennzeich- net, dass die zwei Messer (64, 68) in Transportrichtung (62) mit einem Versatz (90) angeordnet sind. 14. Device (10) according to claim 13, characterized marked, that the two knives (64, 68) in the transport direction (62) are arranged with an offset (90).
15. Vorrichtung (10) einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass ein Messer (92) ein flaches Balkenmesser ist, dessen Schneide (94) etwa senkrecht zu den Wischlippen (82) verläuft und entgegen der Transportrichtung (62) gerich- tet ist.15. Device (10) according to one of claims 8 to 11, characterized in that a knife (92) is a flat bar knife whose cutting edge (94) runs approximately perpendicular to the wiper lips (82) and counter to the transport direction (62). tet is.
16. Vorrichtung (10) nach einem der Ansprüche 8 bis 15, dadurch gekennzeichnet, dass die Messer (18, 20, 64, 68, 92) ortsfest angeordnet sind, wobei der wirksame Schnittbereich relativ zu den Wischlippen (82) einstellbar ist.16. Device (10) according to any one of claims 8 to 15, characterized in that the knives (18, 20, 64, 68, 92) are arranged stationary, wherein the effective cutting area relative to the wiper lips (82) is adjustable.
17. Vorrichtung (10) nach einem der Ansprüche 8 bis 14, dadurch gekennzeichnet, dass die Messer (18, 20, 64, 68) um eine Drehachse quer zu Transportrichtung (62) drehbar gelagert sind. 17. Device (10) according to any one of claims 8 to 14, characterized in that the knives (18, 20, 64, 68) about an axis of rotation transversely to the transport direction (62) are rotatably mounted.
PCT/EP2008/065677 2008-03-05 2008-11-17 Method and device for producing a rubber-elastic wiper strip WO2009109248A1 (en)

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DE102012217862A1 (en) * 2012-09-28 2014-04-03 Robert Bosch Gmbh Method for separating wiper strips, in particular double-extruded wiper strips

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