EP0329130B1 - Cutting apparatus for resin sheets - Google Patents

Cutting apparatus for resin sheets Download PDF

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Publication number
EP0329130B1
EP0329130B1 EP89102651A EP89102651A EP0329130B1 EP 0329130 B1 EP0329130 B1 EP 0329130B1 EP 89102651 A EP89102651 A EP 89102651A EP 89102651 A EP89102651 A EP 89102651A EP 0329130 B1 EP0329130 B1 EP 0329130B1
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EP
European Patent Office
Prior art keywords
cutting
cutting device
compressed air
air receiver
pneumatic cylinder
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.)
Expired - Lifetime
Application number
EP89102651A
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German (de)
French (fr)
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EP0329130A3 (en
EP0329130A2 (en
Inventor
Richard Dipl.-Ing. Brüssel
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.)
Umformtechnik Erfurt GmbH
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Umformtechnik Erfurt 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.)
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Publication date
Application filed by Umformtechnik Erfurt GmbH filed Critical Umformtechnik Erfurt GmbH
Publication of EP0329130A2 publication Critical patent/EP0329130A2/en
Publication of EP0329130A3 publication Critical patent/EP0329130A3/en
Application granted granted Critical
Publication of EP0329130B1 publication Critical patent/EP0329130B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/12—Fluid-pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting 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
    • B26D1/01—Cutting 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
    • B26D1/04—Cutting 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 linearly-movable cutting member
    • B26D1/045—Cutting 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 linearly-movable cutting member for thin material, e.g. for sheets, strips or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/081—With randomly actuated stopping means
    • Y10T83/088—Responsive to tool detector or work-feed-means detector
    • Y10T83/089—Responsive to tool characteristic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8822—Edge-to-edge of sheet or web [e.g., traveling cutter]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8858—Fluid pressure actuated

Definitions

  • Such a device is e.g. known from DE-A-3248574.
  • the cutting device essentially consists of a pneumatic cylinder 1, in which a piston slide 2 is movably guided, to which a cutting blade 3 is attached.
  • the two ends of the pneumatic cylinder 1 are each connected at the end to a changeover valve 5 or 6 designed as a 2/3 directional valve.
  • the changeover valves 5 and 6 are each connected via a line 9 to a compressed air reservoir 7, which is connected to a compressed air source 11 via a line 4, into which a charging valve 8 designed as a 2/2-way valve is connected.
  • the charging valve is advantageously designed as a metering valve that is controlled as a function of time or pressure.

Description

Die Erfindung betrifft eine Schneidvorrichtung für Harzmatten, die als mit einer Folie mindestens einseitig abgedecktes Band von einer Rolle abgespult und von der Folie abgezogen worden sind, nach dem Oberbegriff des Anspruchs 1.The invention relates to a cutting device for resin mats that have been unwound from a roll and pulled off the film as a tape that is covered at least on one side with a film, according to the preamble of claim 1.

Eine derartige Vorrichtung ist z.B. aus der DE-A- 3248574 bekannt.Such a device is e.g. known from DE-A-3248574.

Die mit einer solchen Schneidvorrichtung zugeschnittenen Harzmatten-Teile werden insbesondere für das Formteilverpressen von faserverstärkten Kunststoffen eingesetzt, wobei sie, bevor sie dem Preßvorgang zugeführt werden, in der Regel zu in die Presse einlegbaren Paketen gestapelt werden.The resin mat parts cut with such a cutting device are used, in particular, for molding molded parts of fiber-reinforced plastics, and are usually stacked into packages which can be inserted into the press before being fed to the pressing process.

Nachdem sich bekannte mit einem umlaufenden Kettenantrieb versehene Schneideinrichtungen durch zu niedrige Schneidgeschwindigkeiten den Anforderungen an einen leistungsstarken Arbeitsprozeß nicht gewachsen gezeigt haben, ist bereits vorgeschlagen worden, einen pneumatischen Antrieb für die Schneidklinge einzusetzen. Diese Antriebe haben jedoch den Nachteil, daß trotz relativ hohem Energieeinsatz die Geschwindigkeit nicht auf das erforderliche Maß gesteigert wird. Um eine hohe Geschwindigkeit zu erzielen, sind nicht nur großdimensionierte Ventile und Leitungen für das Druckmedium erforderlich, sondern auch ein großer Aufwand, um die hohe Geschwindigkeit des Kolbens des Pneumatikzylinders wieder abzubremsen. Das bedeutet, daß nicht nur entsprechend aufwendig dimensionierte Dämpfungseinrichtungen einzusetzen sind, sondern daß auch die eingesetzte große Energiemenge nach jedem Schneidvorgang vernichtet wird.After known cutting devices provided with a revolving chain drive have not been able to cope with the requirements of a high-performance work process due to too low cutting speeds, it has already been proposed to use a pneumatic drive for the cutting blade. However, these drives have the disadvantage that, despite the relatively high energy input, the speed is not increased to the required level. In order to achieve a high speed, not only large-sized valves and lines for the pressure medium are required, but also a great effort to slow down the high speed of the piston of the pneumatic cylinder again. This means that not only is it correspondingly complex Dimensioned damping devices are to be used, but that the large amount of energy used is destroyed after each cutting process.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Schneidvorrichtung der gattungsgemäßen Art so zu verbessern, daß ohne größeren apparativen Aufwand weniger Energie für den Schneidvorgang benötigt wird.The present invention is therefore based on the object of improving a cutting device of the generic type in such a way that less energy is required for the cutting process without major expenditure on equipment.

Die Lösung der Aufgabe besteht in den Merkmalen des Anspruchs 1.The solution to the problem consists in the features of claim 1.

Mit der neuen Schneidvorrichtung wird durch den großen Energieeinsatz zu Beginn des Schneidvorgangs eine hohe Beschleunigung der Schneidklinge erzielt, die aber trotz abnehmender Druckbeaufschlagung des Kolbens infolge seiner ihm erteilten Beschleunigung bis zum Ende des eingestellten Schneidhubes - wie sich überraschend gezeigt hat - für den Schneidvorgang völlig ausreicht. Durch die große Anfangsbeschleunigung können auch relativ lappige Ränder von nicht randbeschnittenen Harzmatten, die sonst nur schwer zu schneiden sind, sauber durchtrennt werden, so daß eine vorhergehende Randbeschneidung entfallen kann. Ein weiterer wesentlicher Vorteil der Erfindung besteht darin, daß Dämpfeinrichtungen am Hubende des Pneumatikzylinders praktisch entfallen können, weil die den Kolbenschlitten antreibende Energie am Ende des eingestellten Schneidhubes nahezu aufgezehrt ist. Dadurch wird eine wesentlich größere Standzeit der Verschleißteile sowie auch eine geringere Lärmbelästigung erzielt. Außerdem entfällt der Verschleiß und vor allem der Energieverlust, der bei der bekannten Schneidvorrichtung dadurch entsteht, daß diese auch in der Ruhelage nach den Schneidhüben ständig mit dem vollen Arbeitsdruck beaufschlagt ist.With the new cutting device, a high acceleration of the cutting blade is achieved due to the large amount of energy used at the beginning of the cutting process, which, despite surprisingly decreasing pressurization of the piston due to the acceleration given to it until the end of the set cutting stroke - is surprisingly sufficient - for the cutting process . Due to the high initial acceleration, relatively lobed edges of resin mats not trimmed at the edges, which are otherwise difficult to cut, can also be cut cleanly, so that a previous edge trimming can be omitted. Another important advantage of the invention is that damping devices at the stroke end of the pneumatic cylinder can practically be dispensed with because the energy driving the piston slide is almost consumed at the end of the set cutting stroke. This results in a significantly longer service life for the wearing parts and also less noise pollution. In addition, there is no wear and, above all, energy loss, which is the result in the known cutting device arises that this is constantly subjected to the full working pressure even in the rest position after the cutting strokes.

Dadurch, daß der kolbenstangenlose Pneumatikzylinder der neuen Schneidvorrichtung von beiden Seiten betätigbar ist, kann in jeder Bewegungsrichtung jeweils ein Schnitt ausgeführt werden, und ein Zurückfahren des Werkzeugs in die Ausgangslage nach erfolgtem Schnitt entfällt somit. Dementsprechend ist die hin und her bewegbare Schneidklinge beidseitig schneidend ausgeführt.Because the rodless pneumatic cylinder of the new cutting device can be actuated from both sides, a cut can be carried out in each direction of movement, and the tool does not have to be returned to the starting position after the cut has been made. Accordingly, the reciprocating cutting blade is designed to cut on both sides.

Die Arbeitstaktfolge kann dadurch beschleunigt werden, daß beide Umschaltventile mit jeweils einem Druckluftspeicher verbunden sind. In diesem Fall kann der eine Druckluftspeicher während des Entladens des anderen Speichers aufgeladen werdenThe work cycle sequence can be accelerated in that both changeover valves are each connected to a compressed air reservoir. In this case, one of the compressed air stores can be charged while the other store is being discharged

Bei Verwendung von nur einem Druckluftspeicher für beide Schneidrichtungen wird der apparative Aufwand dadurch noch weiter verringert, daß der Druckluftspeicher durch eine entsprechend dimensionierte Verbindungsleitung zwischen den Umschaltventilen gebildet ist.If only one compressed air reservoir is used for both cutting directions, the outlay on equipment is further reduced by the compressed air reservoir being formed by a correspondingly dimensioned connecting line between the changeover valves.

Für das schnelle Aufladen und/oder zur Anpassung an die benötigte Energiemenge ist es vorteilhaft, dem Druckluftspeicher ein Dosierventil vorzuschalten. Zur Anpassung an die benötigte Energiemenge kann der Druckluftspeicher aber auch volumenverstellbar ausgeführt werden.For rapid charging and / or to adapt to the required amount of energy, it is advantageous to connect a metering valve upstream of the compressed air reservoir. In order to adapt to the required amount of energy, the compressed air storage can also be made volume-adjustable.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Ansprüche 5, 6 und 9 bis 11.Further advantageous embodiments of the invention are the subject of claims 5, 6 and 9 to 11.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt und nachfolgend näher erläutert.In the drawing, an embodiment of the invention is shown schematically and explained in more detail below.

Die Schneidvorrichtung besteht im wesentlichen aus einem Pneumatikzylinder 1, in dem ein Kolbenschlitten 2 bewegbar geführt ist, an welchem eine Schneidklinge 3 befestigt ist. Die beiden Enden des Pneumatikzylinders 1 sind stirnseitig mit jeweils einem als 2/3-Wegeventil ausgebildetem Umschaltventil 5 bzw. 6 verbunden. Mit ihrem anderen Anschlußende sind die Umschaltventile 5 und 6 jeweils über eine Leitung 9 an einen Druckluftspeicher 7 angeschlossen, der über eine Leitung 4, in die ein als 2/2-Wegeventil ausgebildetes Ladeventil 8 eingeschaltet ist, mit einer Druckluftquelle 11 verbunden ist. Das Ladeventil wird vorteilhaft als zeit- oder druckabhängig gesteuertes Dosierventil ausgebildet.The cutting device essentially consists of a pneumatic cylinder 1, in which a piston slide 2 is movably guided, to which a cutting blade 3 is attached. The two ends of the pneumatic cylinder 1 are each connected at the end to a changeover valve 5 or 6 designed as a 2/3 directional valve. With their other connection end, the changeover valves 5 and 6 are each connected via a line 9 to a compressed air reservoir 7, which is connected to a compressed air source 11 via a line 4, into which a charging valve 8 designed as a 2/2-way valve is connected. The charging valve is advantageously designed as a metering valve that is controlled as a function of time or pressure.

In der Zeichnung sind die elektromagnetisch betätigbaren Umschaltventile 5 und 6 in Ruhestellung und der Kolbenschlitten 2 in seiner in der Darstellung linken Endstellung gezeigt. Um den Schneidvorgang durchzuführen, wird nunmehr das linke Umschaltventil 5 betätigt, wodurch die Verbindung zum Druckluftspeicher 7 hergestellt wird und sich der Kolbenschlitten 2 in Richtung des Pfeiles 10 bis in seine rechte Endstellung bewegt. Da das rechte Umschaltventil 6 während des Schneidvorgangs auf Entlüftung geschaltet ist, tritt nur eine entsprechend verringerte Bremswirkung durch die im Pneumatikzylinder 1 komprimierte Luft ein. Nach dem Schneidvorgang kommt der Kolbenschlitten 2 in seiner rechten Endstellung nach dem Verbrauch des wesentlichen Teils der zugeführten Energie zur Ruhe.In the drawing, the electromagnetically actuated changeover valves 5 and 6 are shown in the rest position and the piston slide 2 in its left end position in the illustration. In order to carry out the cutting process, the left changeover valve 5 is now actuated, as a result of which the connection to the compressed air accumulator 7 is established and the piston slide 2 moves in the direction of the arrow 10 into its right end position. Since the right-hand changeover valve 6 is switched to ventilation during the cutting process, only a correspondingly reduced braking effect occurs due to the air compressed in the pneumatic cylinder 1. After the cutting process, the piston slide 2 comes in its right End position after consumption of the major part of the energy supplied to rest.

Danach wird das Umschaltventil 5 wieder auf Entlüftung umgeschaltet und der Druckluftspeicher 7 über das Ladeventil 8 wieder mit einem Druck von etwa 6 bar aufgeladen, so daß die Schneidvorrichtung für den nächsten Schneidvorgang in umgekehrter Richtung durch Betätigen des Umschaltventils 6 wieder bereit ist.Thereafter, the changeover valve 5 is switched back to venting and the compressed air reservoir 7 is again charged with a pressure of about 6 bar via the charging valve 8, so that the cutting device is ready for the next cutting operation in the opposite direction by actuating the changeover valve 6.

Der druckluftbeaufschlagte Kolbenschlitten 2 erreicht wegen seiner geringen Masse und dem fehlenden Gegendruck infolge der entlüfteten Gegenseite bereits nach kürzester Strecke eine sehr hohe Geschwindigkeit, z.B. > 5 m/sec. Durch die aufzubringende Schnittkraft, den abfallenden Antriebsdruck und den durch Luftstau vor dem jeweiligen Umschaltventil ansteigenden Gegendruck muß der Kolbenschlitten 2 nur noch mit seiner kinetischen Energie und mit seiner bereits auf etwa 1/6 reduzierten pneumatischen Antriebskraft abgebremst werden. Dazu reicht die sich im Pneumatikzylinder 1 selbst einstellende Dämpfung, die sogenannte Endlagendämpfung, vollkommen aus.Due to its low mass and the lack of back pressure due to the vented opposite side, the piston slide 2, which is pressurized with compressed air, reaches a very high speed after a short distance, e.g. > 5 m / sec. Due to the cutting force to be applied, the falling drive pressure and the back pressure rising due to air build-up in front of the respective switching valve, the piston slide 2 only has to be braked with its kinetic energy and with its pneumatic drive force already reduced to about 1/6. The damping that sets itself in the pneumatic cylinder 1, the so-called end position damping, is completely sufficient for this.

Die Abdichtung des sich über die gesamte Laufstrecke (Hub) des Kolbenschlittens erstreckenden Schlitzes, durch den die Verbindung zwischen Kolbenschlitten 2 und dem Halter für die Schneidklinge 3 hindurchgeführt ist, gehört zum bekannten Stand der Technik.The sealing of the slot extending over the entire running distance (stroke) of the piston slide, through which the connection between the piston slide 2 and the holder for the cutting blade 3 is passed, is part of the known prior art.

Das nicht dargestellte, senkrecht zur Zeichnungsebene zugeführte Harzmatten-Band wird vor dem Schneiden von den beide Seiten abdeckenden Folien durch Abziehen freigelegt und beim Schneidvorgang mittels eines pneumatisch betätigbaren, schienenartigen, in Schneidrichtung verlaufenden Klemmbacken-Paares gehalten, an dem die Schneidklinge 3 so dicht wie möglich entlang bewegt wird.The resin mat tape, not shown, which is fed perpendicular to the plane of the drawing, is uncovered by peeling off the films that cover both sides, and at Cutting process by means of a pneumatically actuated, rail-like pair of jaws running in the cutting direction, on which the cutting blade 3 is moved as close as possible.

In beiden Endstellungen des Kolbenschlittens 2 ist im Bereich der Schneidklinge 3 ein berührungslos arbeitender, als Lichtschranke ausgebildeter Sensor angeordnet. Er besteht aus einer Lumineszenzdiode und einem zugeordneten Fototransistor oder einer Fotodiode. Durch diese Anordnung kann nicht nur eine Kontrolle auf Messerbruch durchgeführt, sondern auch die Funktion und Betriebsbereitschaft der Schneidvorrichtung ständig überwacht werden. Der Sensor kann gleichzeitig mit einer Schalteinrichtung für die Vorschubeinrichtung des zuzuführenden Harzmatten-Bandes gekoppelt werden.In both end positions of the piston slide 2, a contactless sensor designed as a light barrier is arranged in the area of the cutting blade 3. It consists of a luminescence diode and an assigned photo transistor or a photo diode. With this arrangement, not only can a check for knife break be carried out, but also the function and operational readiness of the cutting device can be continuously monitored. The sensor can be coupled simultaneously with a switching device for the feed device of the resin mat tape to be fed.

Claims (11)

  1. Cutting device for resin mats which have been unwound, in the shape of a band lined on at least one side with a foil, from a roll and have been stripped from the foil, comprising a pneumatic drive (1, 2) for one or more fastening means for a cutting blade (3),
    characterised in that cutting blade (3) is secured to a plunger slide (2) capable of being displaced within a pneumatic cylinder (1) without piston rod;
    in that pneumatic cylinder (1) can be connected at its ends to a compressed air receiver (7) via a reversing valve (5,6) respectively, whereby said air receiver (7) can be recharged by means of a compressed air source (11) via a charging valve (8) and has a capacity adapted to the amount of energy required for the cutting process; and in that pneumatic cylinder (1) can be supplied, via the charged compressed air receiver (7) which has been disconnected from compressed air source (11), with pressure energy in such a way as to ensure that plunger slide (2) with cutting blade (3), having started up subject to high acceleration, carries out the cutting process subject to decreasing pressure energy and that at the end of the cutting stroke the pressure energy has been nearly used up.
  2. Cutting device according to Claim 1, characterised in that the capacity of compressed air receiver (7) is slightly larger than the cutting energy.
  3. Cutting device according to Claim 1 or 2, characterised in that the two reversing valves (5, 6) are connected with one compressed air receiver (7) each.
  4. Cutting device according to Claim 1 or 2, characterised in that compressed air receiver (7) is constituted by an appropriately dimensioned connecting line between reversing valves (5, 6).
  5. Cutting device according to one of the preceding claims, characterised in that the volume of compressed air receiver or receivers (7) amounts to one third to one tenth of the volume of pneumatic cylinder (1).
  6. Cutting device according to Claim 5, characterised in that the volume amounts to one eighth to one fifth of the volume of pneumatic cylinder (1).
  7. Cutting device according to one of Claims 1 to 6, characterised in that the volume of compressed air receiver or receivers (7) can be adjusted.
  8. Cutting device according to one of the preceding claims, characterised in that at the points corresponding to the end position of cutting blade (3) a sensor for monitoring blade fractures is arranged, said sensor preferably operating in a contactless manner.
  9. Cutting device according to Claim 8, characterised in that the sensor consists of a light-barrier arrangement, preferably with a luminescent diode and an appropriate photo transistor or a photo diode.
  10. Cutting device according to one of the preceding claims, characterised in that the reversing valves are 2/3-way valves (5, 6).
  11. Cutting device according to one of the preceding claims, characterised in that cutting blade (3) can be guided past pneumatically operable clamping jaws for the band of resin mat.
EP89102651A 1988-02-19 1989-02-16 Cutting apparatus for resin sheets Expired - Lifetime EP0329130B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3805164A DE3805164A1 (en) 1988-02-19 1988-02-19 CUTTING DEVICE FOR RESIN MATS
DE3805164 1988-02-19

Publications (3)

Publication Number Publication Date
EP0329130A2 EP0329130A2 (en) 1989-08-23
EP0329130A3 EP0329130A3 (en) 1991-01-30
EP0329130B1 true EP0329130B1 (en) 1993-12-01

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ID=6347709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102651A Expired - Lifetime EP0329130B1 (en) 1988-02-19 1989-02-16 Cutting apparatus for resin sheets

Country Status (5)

Country Link
US (1) US4982638A (en)
EP (1) EP0329130B1 (en)
JP (1) JP2666863B2 (en)
DE (1) DE3805164A1 (en)
ES (1) ES2046341T3 (en)

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JPS59122209U (en) * 1983-02-07 1984-08-17 株式会社デイスコ Cutting machine
JPS60245810A (en) * 1984-05-18 1985-12-05 Yunikamu:Kk Reciprocal motion actuator utilizing fluid pressure cylinder
DE8424035U1 (en) * 1984-08-13 1984-11-22 Herion-Werke Kg, 7012 Fellbach PISTONLESS CYLINDER
JPS61124704A (en) * 1984-11-16 1986-06-12 Fujitsu Ltd Piston mechanism
DE3509891A1 (en) * 1985-03-19 1986-09-25 Herion-Werke Kg, 7012 Fellbach PISTONLESS CYLINDER
DE3538117A1 (en) * 1985-10-26 1987-04-30 Hoechst Ag DISCONNECTING DEVICE FOR PLATES
DE3619473A1 (en) * 1986-06-10 1987-12-17 Knorr Bremse Ag Pressure medium-driven, piston rod-less working cylinder

Also Published As

Publication number Publication date
US4982638A (en) 1991-01-08
EP0329130A3 (en) 1991-01-30
JPH01246092A (en) 1989-10-02
ES2046341T3 (en) 1994-02-01
DE3805164A1 (en) 1989-08-31
JP2666863B2 (en) 1997-10-22
EP0329130A2 (en) 1989-08-23
DE3805164C2 (en) 1993-07-22

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