DE19615852A1 - Durable tubing used in pressure-operated linear drive having long life under repetitive pinching - Google Patents

Durable tubing used in pressure-operated linear drive having long life under repetitive pinching

Info

Publication number
DE19615852A1
DE19615852A1 DE1996115852 DE19615852A DE19615852A1 DE 19615852 A1 DE19615852 A1 DE 19615852A1 DE 1996115852 DE1996115852 DE 1996115852 DE 19615852 A DE19615852 A DE 19615852A DE 19615852 A1 DE19615852 A1 DE 19615852A1
Authority
DE
Germany
Prior art keywords
hose
shore
pressure
hardness
wall
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE1996115852
Other languages
German (de)
Inventor
Fritz Dr Roethemeyer
Harald Kranz
Wolfgang Kleiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ContiTech Schlauch GmbH
Original Assignee
ContiTech Schlauch 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 ContiTech Schlauch GmbH filed Critical ContiTech Schlauch GmbH
Priority to DE1996115852 priority Critical patent/DE19615852A1/en
Publication of DE19615852A1 publication Critical patent/DE19615852A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/122—Hoses provided with integrated fixing means, e.g. hooks

Abstract

This tube (1) for pressure-operated linear drives is new in its plasticiser-free, thermoplastic polyurethane construction. Its open width is 4-8 times its wall thickness Preferably, a single layer of unplasticised polyurethane is used. Its Shore A hardness is 60-80, preferably 70. A similar two-layer construction has harder polyurethane externally, being 80-90 Shore A. There is an edging strip (3) attached externally. This is inserted into and interlocks with a rail-like track. It takes the form of a circular cord section, attached to the tube by a bridging section.

Description

Die Erfindung betrifft einen Schlauch für druckmittelbetätigte Linearantriebe, wie im Oberbegriff des Patentanspruchs 1 angegeben.The invention relates to a hose for pressure fluid operated Linear drives, as in the preamble of claim 1 specified.

In der Vergangenheit sind zahlreiche Vorschläge für derartige Linearantriebe gemacht worden. Ein besonders vorteilhafter und inzwischen in der Praxis bewährter Vorschlag ist in der DE 44 16 934 C1 beschrieben. Im praktischen Betrieb derartiger Einrichtungen hat sich gezeigt, daß es für die Zuverlässigkeit und die Lebensdauer der gesamten Anlage entscheidend auf die Funktionssicherheit, Ermüdungs- und Verschleißfestigkeit der verwendeten Schläuche ankommt; denn diese werden im bestimmungsgemäßen Einsatz extremen Verformungen und insbesondere Biege-Wechselbeanspruchungen ausgesetzt, die bisher regelmäßig zu frühzeitigen Defekten führten.In the past there have been numerous proposals for such Linear drives have been made. A particularly advantageous and is now a tried and tested proposal in practice DE 44 16 934 C1 described. In practical operation such Facilities have been shown to be reliable and the lifespan of the entire system is crucial to that Functional reliability, fatigue and wear resistance of the used hoses arrives; because these are in Intended use extreme deformations and especially exposed to alternating bending stresses previously regularly led to premature defects.

Es stellte sich daher die Aufgabe, einen Schlauch für druckmittelbetätigte Linearantriebe zu entwickeln, der den Lastwechseln, denen er in derartigen Anriebssystemen ständig ausgesetzt ist, auf Dauer standhält, wobei das Ziel bestand, mindestens 2 Millionen defektfreie Lastwechsel zu erreichen.It was therefore the task of a hose for to develop pressure-actuated linear drives, which the Load changes, which he constantly in such drive systems exposed, persists with the aim of to achieve at least 2 million defect-free load changes.

Erfindungsgemäß wird diese Aufgabe durch den im Patentanspruch 1 gekennzeichneten Spezialschlauch gelöst, der sich durch die vorteilhafte Kombination eines geeigneten Werkstoffs mit den konstruktiven Parametern des Schlauchaufbaues auszeichnet.According to the invention, this object is achieved by the claim 1 marked special hose loosened by the advantageous combination of a suitable material with the  design parameters of the hose structure.

In den Unteransprüchen sind vorteilhafte Ausführungsformen der Erfindung angegeben. Bei einschichtiger Ausbildung der Schlauchwandung hat sich als Wandungswerkstoff ein weichmacherfreies thermoplastisches Polyurethan mit einer Härte von 60-80 Shore A besonders bewährt. Vorzugsweise wird ein Polyurethan mit einer Härte von ca. 70 Shore A verwendet.In the dependent claims, advantageous embodiments of the Invention specified. With a single shift of training Hose wall has become a wall material plasticizer-free thermoplastic polyurethane with a Hardness of 60-80 Shore A especially proven. Preferably uses a polyurethane with a hardness of approx. 70 Shore A.

In einer anderen bevorzugten Ausführungsform der Erfindung ist die Schlauchwandung zweischichtig aus weichmacherfreiem thermoplastischem Polyurethan aufgebaut, wobei die Innenschicht eine Härte von 60-70 Shore A aufweist und daher besonders flexibel ist, während die Außenschicht eine Härte von 80-90 Shore A besitzt und daher gegenüber äußeren Einflüssen - insbesondere gegenüber den Relativbewegungen der ständig über sie hinwegrollenden Quetschrolle - bzw. Quetschrollen - unempfindlich ist.In another preferred embodiment of the invention the hose wall in two layers made of plasticizer-free thermoplastic polyurethane built, the Inner layer has a hardness of 60-70 Shore A and therefore is particularly flexible, while the outer layer is hard of 80-90 Shore A and therefore opposite to the outside Influences - especially in relation to the relative movements of the constantly squeezing roll - or Pinch rolls - is insensitive.

In einer weiteren Ausgestaltung der Erfindung weist der Schlauch an der Außenseite seiner Wandung einstückig mit dieser - bei der zweischichtigen Ausführungsform einstückig mit der härteren Außenschicht - eine angeformte Kederleiste auf, mittels derer der Schlauch an der zugehörigen schienenartigen Führungsbahn befestigt werden kann, indem die Kederleiste formschlüssig in eine in der Führungsbahn vorgesehene Ausnehmung eingefügt wird. Die Kederleiste ist vorzugsweise als ein Rundschnur-artiger Wulst ausgebildet, der über einen in Längsrichtung durchlaufenden, radial von der Schlauchwandung abstehenden Steg mit der Schlauchwandung verbunden ist.In a further embodiment of the invention, the One-piece hose on the outside of its wall this - in one piece in the two-layer embodiment with the harder outer layer - a molded welt strip by means of which the hose on the associated rail-like guideway can be attached by the Piping strip in a form-fitting manner in the guideway provided recess is inserted. The piping is preferably formed as a round cord-like bead that over a lengthwise, radial from the Protruding web with the hose wall connected is.

Claims (5)

1. Schlauch für druckmittelbetätigte Linearantriebe, dadurch gekennzeichnet, daß er aus weichmacherfreiem thermoplastischem Polyurethan gebildet ist und seine lichte Weite das 4- bis 8-fache seiner Wandstärke beträgt.1. Hose for pressure-actuated linear drives, characterized in that it is formed from plasticizer-free thermoplastic polyurethane and its clear width is 4 to 8 times its wall thickness. 2. Schlauch nach Anspruch 1, dadurch gekennzeichnet, daß seine Wandung einschichtig aus einem weichmacherfreien thermoplastischen Polyurethan mit einer Härte von 60 bis 80 Shore A, vorzugsweise ca. 70 Shore A, gebildet ist.2. Hose according to claim 1, characterized in that its Single-layer wall made of a plasticizer-free thermoplastic polyurethane with a hardness of 60 to 80 Shore A, preferably about 70 Shore A, is formed. 3. Schlauch nach Anspruch 1, dadurch gekennzeichnet, daß seine Wandung zweischichtig aus weichmacherfreiem, thermoplastischem Polyurethan gebildet ist, wobei die Innenschicht eine Härte von 60 bis 70 Shore A und die Außenschicht eine Härte von 80 bis 90 Shore A aufweist.3. Hose according to claim 1, characterized in that its Two-layer wall made of plasticizer-free, thermoplastic polyurethane is formed, the Inner layer a hardness of 60 to 70 Shore A and the The outer layer has a hardness of 80 to 90 Shore A. 4. Schlauch nach einem der Ansprüche 1-3, dadurch gekennzeichnet, daß er zur Befestigung an einer schienenartigen Führungsbahn eine formschlüssig in diese einfügbare, an die Außenseite der Schlauchwandung angeformte Kederleiste aufweist.4. Hose according to one of claims 1-3, characterized characterized in that it can be attached to a rail-like guideway a form-fitting in this insertable to the outside of the hose wall molded piping. 5. Schlauch nach Anspruch 4, dadurch gekennzeichnet, daß die Kederleiste als rundschnur-artiger Wulst ausgebildet ist, der über einen radial von der Schlauchwandung abstehenden Steg mit der Schlauchwandung verbunden ist.5. Hose according to claim 4, characterized in that the Piping strip is designed as a round cord-like bead, the one protruding radially from the hose wall Web is connected to the hose wall.
DE1996115852 1996-04-20 1996-04-20 Durable tubing used in pressure-operated linear drive having long life under repetitive pinching Withdrawn DE19615852A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996115852 DE19615852A1 (en) 1996-04-20 1996-04-20 Durable tubing used in pressure-operated linear drive having long life under repetitive pinching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996115852 DE19615852A1 (en) 1996-04-20 1996-04-20 Durable tubing used in pressure-operated linear drive having long life under repetitive pinching

Publications (1)

Publication Number Publication Date
DE19615852A1 true DE19615852A1 (en) 1997-10-23

Family

ID=7791989

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996115852 Withdrawn DE19615852A1 (en) 1996-04-20 1996-04-20 Durable tubing used in pressure-operated linear drive having long life under repetitive pinching

Country Status (1)

Country Link
DE (1) DE19615852A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0948108A2 (en) * 1998-04-03 1999-10-06 Fränkische Rohrwerke Gebr. Kirchner GmbH & Co. Corrugated tubing with foot
EP2112296A1 (en) * 2008-04-25 2009-10-28 Bernhard Feigl Protective wall and pressure piece for the fixation of a protective wall

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0948108A2 (en) * 1998-04-03 1999-10-06 Fränkische Rohrwerke Gebr. Kirchner GmbH & Co. Corrugated tubing with foot
EP0948108A3 (en) * 1998-04-03 2001-05-16 Fränkische Rohrwerke Gebr. Kirchner GmbH & Co. Corrugated tubing with foot
EP2112296A1 (en) * 2008-04-25 2009-10-28 Bernhard Feigl Protective wall and pressure piece for the fixation of a protective wall

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