EP0933171A2 - Cutting device with oscillating cutting wires - Google Patents

Cutting device with oscillating cutting wires Download PDF

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Publication number
EP0933171A2
EP0933171A2 EP99101185A EP99101185A EP0933171A2 EP 0933171 A2 EP0933171 A2 EP 0933171A2 EP 99101185 A EP99101185 A EP 99101185A EP 99101185 A EP99101185 A EP 99101185A EP 0933171 A2 EP0933171 A2 EP 0933171A2
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EP
European Patent Office
Prior art keywords
cutting
wire
cutting device
longitudinal
rocker arm
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.)
Granted
Application number
EP99101185A
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German (de)
French (fr)
Other versions
EP0933171B1 (en
EP0933171A3 (en
Inventor
Heinz Hollfelder
Andreas Syen
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.)
Kurtz Altaussee GmbH
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Kurtz Altaussee GmbH
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Publication date
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Publication of EP0933171A2 publication Critical patent/EP0933171A2/en
Publication of EP0933171A3 publication Critical patent/EP0933171A3/en
Application granted granted Critical
Publication of EP0933171B1 publication Critical patent/EP0933171B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26FPERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00Severing by means other than cutting; Apparatus therefor
    • B26F3/06Severing by using heat
    • B26F3/08Severing by using heat with heated members
    • B26F3/12Severing by using heat with heated members with heated wires
    • 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
    • B26D1/04Cutting 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
    • B26D1/06Cutting 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 wherein the cutting member reciprocates
    • B26D1/10Cutting 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 wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge
    • 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
    • B26D1/04Cutting 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
    • B26D1/06Cutting 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 wherein the cutting member reciprocates
    • B26D1/10Cutting 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 wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge
    • B26D1/11Cutting 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 wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge with a plurality of cutting members
    • 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
    • B26D1/547Cutting 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 wire-like cutting member
    • B26D1/553Cutting 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 wire-like cutting member with a plurality of wire-like cutting members

Definitions

  • the present invention relates to a cutting device for cutting thermally processable material according to the preamble of claim 1.
  • Such a cutting device is from the DE-GM 83 26 687 known.
  • This device Cutting frame with the same weight at a distance from each other arranged one inside the other.
  • the outer cutting frame is driven by an eccentric drive an oscillating movement.
  • This swinging motion is through the coil springs on the inner frame transfer.
  • So cutting frames are different Size provided despite different Material requirements must have the same weight, i.e., that the inner cutting frame must be made heavier when it was manufactured according to the strength values could.
  • the cutting elements have the outer Cutting frame a longer length, although only foam blocks can be cut, the dimensions of which inner, smaller cutting frame is limited. Corresponding the large material masses are also sufficiently large drive units and operational power systems necessary.
  • the oscillating movement serves the Cutting wires during the cutting process due to the resulting Heat friction so much that the foam material of the foam block in the cutting plane melts and the Block is cut thereby.
  • the object of the present invention is to be achieved are, a cutting device of the type mentioned To be designed so that an oscillating movement of the Cutting wires in a simpler and cheaper way can be done as this with the beginning described device is possible.
  • a cutting device of the type mentioned To should also be made possible with cutting devices electrically heated cutting wires as smooth as possible and as few open pores as possible To reach the cutting surface.
  • the invention is particularly characterized in that only small masses in motion for the cutting process must be set. As a result, will only be comparative small drive units and energy supply systems needed. Also the foundation for the invention The device can be designed to be less resilient become.
  • a cutting device with electrically heated Cutting wires is the cut surface at least in the View smoother and less porous than that of the Processing with the known cutting devices.
  • the cutting speed can be increased.
  • 1 is a first and 2 is a second side member designated, the distance 3 parallel to each other on one Frame beams 4 and 5 of a cutting frame of a cutting device for cutting or cutting blocks, in particular Foam blocks, made of thermally processable Material such as polystyrene are attached.
  • Each longitudinal beam 1, 2 preferably has two linear guides 6.1 or 6.2, each with an adjustment slide 7.1 or 7.2 longitudinally adjustable and positionally adjustable is.
  • the adjustment slides 7.1., 7.2 are driven electrically, for example via servomotors, or pneumatic or hydraulic.
  • longitudinal beams 1, 2 are also parallel to each other and to the longitudinal beams 1, 2 arranged longitudinal sliding guides 8.1, 9.1 or 8.2, 9.2 attached.
  • longitudinal sliding guides 8.1, 9.1 or 8.2, 9.2 attached on these are a plurality of, for example, 30 to 150 Wire guides 10.1 and 10.2 guided in a longitudinally displaceable manner by suitable means in one by means of the adjusting slide 7.1, 7.2 adjusted longitudinal position or position adjustable.
  • the adjustment of the wire guides 10.1, 10.2 is carried out by means of the adjustment slide if necessary 7.1, 7.2 each have an electrical, pneumatic or hydraulic coupling element 7.1.1 or 7.2.1.
  • the wire guides 10.1 of the longitudinal beam 1 each have one Wire holder 11.1 and the wire guides 10.2 of the side member 2 each have a wire holder 11.2.
  • the wire holders 11.1, 11.2 are as rocker arms 11.1 and 11.2 formed by a parallel to the longitudinal beam 1 or 2 extending pivot axis 12.1 or 12.2 pivotable are stored.
  • the rocker arms 11.1, 11.2 have at the foot end slightly inclined stop surfaces 11.1.1 and 11.2.1, that limit the swivel range of the rocker arms 11.1, 11.2.
  • the rocker arm 11.1, 11.2 At the head end 11.1.2 or 11.2.2 of an arm 11.1.3 or 11.2.3 the rocker arm 11.1, 11.2, the angle ( ⁇ ), in particular at right angles to that through the side members 1, 2 spanned virtual level 13 is one end 14.1 and 14.2 of a cutting wire 14 attached.
  • the longitudinal axis 14.3 of the cutting wire 14 runs parallel to the virtual plane 13 formed by the longitudinal beams 1 and 2 from one rocker arm 11.1 to another rocker arm 11.2.
  • the Rocker arms 11.1 of the side member 1 are each one Spring element 15 biased such that the cutting wire 14th is excited. The cutting wire 14 is thus through the pivoted rocker arms 11.1, 11.2 against Force of the spring element 15 in the direction of its longitudinal axis 14.3 can be moved back and forth.
  • Eccentric drive 16 is via a joint 19 on a lever 20.1 a rod 20 running parallel to the longitudinal beam 2 articulated, which is also parallel to the side member 2 extending axis 21 is pivotable.
  • the rod 20 has one over the entire adjustment range the rocker arm 11.2 along the longitudinal sliding guides 8.2, 9.2 extending cams 20.2.
  • the cam 20.2 is in Operating position of the eccentric drive 16, for example on Arm 11.2.3 of all rocker arms 11.2 or, as in the embodiment shown, on a special lever arm 11.2.4 the same.
  • This eccentric stroke causes a back and forth movement of the cutting wire 14 corresponds to the cutting stroke 22 of the cutting wire 14 the adjustment angle ( ⁇ ) of the rod 20 and its cam 20.2 according to the eccentric stroke directly or, depending on the choice of Length and arrangement of the lever 20.1, reduced accordingly or enlarged.
  • the eccentric drive 16 thus forms together with the rod 20 and its cam 20.2 a cam drive for the cutting wire 14 and thus also for everyone on the longitudinal beams 1, 2 existing wire guides 10.1, 10.2 with their rocker arms 11.1, 11.2 and their cutting wires 14 so tensioned.
  • rocker arms 11.2 common Cam 20.2 can also be used for each rocker arm 11.2 these individually assigned cams are present, whereby then these cams according to the possible adjustment of the Rocker arm 11.2 to adjust the position of the cutting wires 14 must be adjusted with.
  • a cutting device using electrical heated cutting wire is a longitudinal sliding guide 8.1 or 9.1 or 8.2 or 9.2 of the side members 1, 2 as Conductor rail formed over which the heating wires the heating voltage can be supplied.
  • the feeding of the Heating voltage is preferably via the respective wire guide 10.1 or 10.2 and the wire holder or the rocker arm 11.1 or 11.2.
  • the cutting wire frequency is advantageously about 20 Hz up to 100 Hz, in particular about 40 Hz.
  • the cutting wire stroke 22 is about 5 mm to 30 mm when used in systems with electrically heated cutting wires 14 preferably about 5 mm to 15 mm, in particular about 10 mm.
  • the operation of the cutting device according to the invention is the following:
  • the foam blocks to be cut are in this operating state by the cutting frame transported and - if desired - under heating of the Cutting wires 14 cut. It is also possible to do that too cutting foam blocks to fix and To move the cutting frame, the cutting wires 14 through to be pushed through or through the foam blocks.
  • the eccentric drive 16 switched off and, if necessary, to reset the Cutting wires 14 pivoted into the position in which the Cam 20.2 out of operative connection with the rocker arms 11.2 is.
  • the cutting process can be carried out again in the specified manner.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Details Of Cutting Devices (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
  • Knives (AREA)
  • Shearing Machines (AREA)

Abstract

A support frame carries adjustable tensioning and reciprocating mechanisms to oscillate the heated cutting wires axially by 5-15 mm at about 40 Hz during relative movement to the polystyrene blocks. Each wire has its own tension spring with a common eccentric driven rocker shaft running the length of the frame. A tilt mechanism can disengage the rocker drive using a hydraulic actuating cylinder.

Description

Die vorliegende Erfindung bezieht sich auf eine Schneidvorrichtung zum Schneiden von thermisch bearbeitbarem Material gemäß dem Oberbegriff des Anspruchs 1.The present invention relates to a cutting device for cutting thermally processable material according to the preamble of claim 1.

Eine derartige Schneidvorrichtung ist aus dem DE-GM 83 26 687 bekannt. Bei dieser Vorrichtung sind zwei Schneidrahmen mit gleichem Gewicht im Abstand zueinander ineinander angeordnet. Zwischen den Schneidrahmen sind vorgespannte Spiralfedern in Verschieberichtung vorgesehen. Der äußere Schneidrahmen wird durch einen Exzenterantrieb in eine oszillierende Bewegung versetzt. Diese Schwingbewegung wird durch die Spiralfedern auf den inneren Rahmen übertragen. Es sind also Schneidrahmen unterschiedlicher Größe vorgesehen, die trotz unterschiedlichen Materialbedarfs das gleiche Gewicht besitzen müssen, d.h., daß der innere Schneidrahmen schwerer gemacht werden muß, als er den Festigkeitswerten entsprechend hergestellt werden könnte. Weiterhin besitzen die Schneidelemente des äußeren Schneidrahmens eine größere Länge, obwohl nur Schaumstoffblöcke geschnitten werden können, deren Maße durch den inneren, kleineren Schneidrahmen begrenzt ist. Entsprechend den großen Materialmassen sind auch ausreichend große Antriebseinheiten und betriebliche Energieversorgungsanlagen notwendig. Die oszillierende Bewegung dient dazu, die Schneiddrähte beim Schneidvorgang durch die entstehende Reibung so stark zu erhitzen, daß das Schaumstoffmaterial des Schaumstoffblocks in der Schnittebene schmilzt und der Block dadurch geschnitten wird.Such a cutting device is from the DE-GM 83 26 687 known. There are two in this device Cutting frame with the same weight at a distance from each other arranged one inside the other. Are between the cutting frame preloaded coil springs are provided in the direction of displacement. The outer cutting frame is driven by an eccentric drive an oscillating movement. This swinging motion is through the coil springs on the inner frame transfer. So cutting frames are different Size provided despite different Material requirements must have the same weight, i.e., that the inner cutting frame must be made heavier when it was manufactured according to the strength values could. Furthermore, the cutting elements have the outer Cutting frame a longer length, although only foam blocks can be cut, the dimensions of which inner, smaller cutting frame is limited. Corresponding the large material masses are also sufficiently large drive units and operational power systems necessary. The oscillating movement serves the Cutting wires during the cutting process due to the resulting Heat friction so much that the foam material of the foam block in the cutting plane melts and the Block is cut thereby.

Es sind auch Anlagen bekannt, bei denen die Schneiddrähte elektrisch auf Schneidtemperatur erhitzt werden. Hierbei wird jedoch keine Bewegung der Schneiddrähte vorgenommen.Systems are also known in which the cutting wires be heated electrically to the cutting temperature. Here however, there is no movement of the cutting wires.

Mit der vorliegenden Erfindung soll die Aufgabe gelöst werden, eine Schneidvorrichtung der eingangs erwähnten Art so auszugestalten, daß eine oszillierende Bewegung der Schneiddrähte in einfacherer und kostengünstigerer Weise durchgeführt werden kann als dies mit der eingangs beschriebenen Vorrichtung möglich ist. Insbesondere soll auch ermöglicht werden, bei Schneidvorrichtungen mit elektrisch beheizten Schneiddrähten eine möglichst glatte und möglichst wenige offene Poren aufweisende Schnittoberfläche zu erreichen.The object of the present invention is to be achieved are, a cutting device of the type mentioned To be designed so that an oscillating movement of the Cutting wires in a simpler and cheaper way can be done as this with the beginning described device is possible. In particular, should also be made possible with cutting devices electrically heated cutting wires as smooth as possible and as few open pores as possible To reach the cutting surface.

Gelöst wird diese Aufgabe durch die Merkmale des Anspruchs 1.This problem is solved by the features of the claim 1.

Die Erfindung zeichnet sich insbesondere dadurch aus, daß für den Schneidvorgang lediglich geringe Massen in Bewegung gesetzt werden müssen. Infolgedessen werden nur vergleichsweise kleine Antriebseinheiten und Energieversorgungsanlagen benötigt. Auch das Fundament für die erfindungsgemäße Vorrichtung kann entsprechend geringer belastbar bemessen werden. The invention is particularly characterized in that only small masses in motion for the cutting process must be set. As a result, will only be comparative small drive units and energy supply systems needed. Also the foundation for the invention The device can be designed to be less resilient become.

Bei einer Schneidvorrichtung mit elektrisch beheizten Schneiddrähten ist die Schnittfläche zumindest in der Ansicht glatter und weniger offenporig als bei der Bearbeitung mit den vorbekannten Schneidvorrichtungen. Außerdem kann bei der erfindungsgemäßen Schneidvorrichtung die Schnittgeschwindigkeit erhöht werden.With a cutting device with electrically heated Cutting wires is the cut surface at least in the View smoother and less porous than that of the Processing with the known cutting devices. In addition, in the cutting device according to the invention the cutting speed can be increased.

Weitere vorteilhafte Einzelheiten der Erfindung sind in den Unteransprüchen angegeben und werden nachfolgend anhand des in der Zeichnung veranschaulichten Ausführungsbeispiels näher beschrieben. Es zeigen:

Fig. 1
eine Seitenansicht einer erfindungsgemäßen Schneidvorrichtung gemäß dem Schnitt C-C der Fig. 5,
Fig. 2
einen vergrößerten Ausschnitt des Kreisausschnitts der Fig. 5,
Fig. 3
eine Seitenansicht gemäß dem Schnitt A-A der Fig. 5 bei weggeschwenktem Exzenterantrieb,
Fig. 4
eine Seitenansicht gemäß dem Schnitt A-A der Fig. 5 mit eingeschwenktem Exzenterantrieb und
Fig. 5
eine Ansicht in Richtung des Pfeiles B der Fig. 1.
Further advantageous details of the invention are specified in the subclaims and are described in more detail below with reference to the exemplary embodiment illustrated in the drawing. Show it:
Fig. 1
2 shows a side view of a cutting device according to the invention according to section CC of FIG. 5,
Fig. 2
5 shows an enlarged section of the circular section of FIG. 5,
Fig. 3
5 shows a side view according to section AA of FIG. 5 with the eccentric drive pivoted away,
Fig. 4
a side view along section AA of FIG. 5 with the eccentric drive pivoted in and
Fig. 5
a view in the direction of arrow B of FIG. 1st

Mit 1 ist ein erster und mit 2 ist ein zweiter Längsträger bezeichnet, die im Abstand 3 parallel zueinander an je einem Rahmenbalken 4 bzw. 5 eines Schneidrahmens einer Schneidvorrichtung zum Schneiden bzw. Zertrennen von Blöcken, insbesondere Schaumstoffblöcken, aus thermisch bearbeitbarem Material, wie Polystyrol, angebracht sind.1 is a first and 2 is a second side member designated, the distance 3 parallel to each other on one Frame beams 4 and 5 of a cutting frame of a cutting device for cutting or cutting blocks, in particular Foam blocks, made of thermally processable Material such as polystyrene are attached.

Jeder Längsträger 1, 2 besitzt bevorzugt je zwei Linearführungen 6.1 bzw. 6.2, auf denen je ein Einstellschlitten 7.1 bzw. 7.2 längsverstellbar und lagejustierbar gelagert ist. Der Antrieb der Einstellschlitten 7.1., 7.2 erfolgt elektrisch, beispielsweise über Stellmotoren, oder pneumatisch oder auch hydraulisch.Each longitudinal beam 1, 2 preferably has two linear guides 6.1 or 6.2, each with an adjustment slide 7.1 or 7.2 longitudinally adjustable and positionally adjustable is. The adjustment slides 7.1., 7.2 are driven electrically, for example via servomotors, or pneumatic or hydraulic.

An den Längsträgern 1, 2 sind außerdem je zwei parallel zueinander und zu den Längsträgern 1, 2 angeordnete Längsschiebeführungen 8.1, 9.1 bzw. 8.2, 9.2 angebracht. Auf diesen ist eine Mehrzahl von beispielsweise 30 bis 150 Drahtführungen 10.1 bzw. 10.2 längsverschiebbar geführt und durch geeignete Mittel in einer mittels der Einstellschlitten 7.1, 7.2 eingestellten Längsposition lagejustiert bzw. lagejustierbar. Die Verstellung der Drahtführungen 10.1, 10.2 erfolgt bei Bedarf mittels der Einstellschlitten 7.1, 7.2 über je ein an diesen vorgesehenes elektrisches, pneumatisches oder hydraulisches Kupplungsglied 7.1.1 bzw. 7.2.1.On the longitudinal beams 1, 2, two are also parallel to each other and to the longitudinal beams 1, 2 arranged longitudinal sliding guides 8.1, 9.1 or 8.2, 9.2 attached. On these are a plurality of, for example, 30 to 150 Wire guides 10.1 and 10.2 guided in a longitudinally displaceable manner by suitable means in one by means of the adjusting slide 7.1, 7.2 adjusted longitudinal position or position adjustable. The adjustment of the wire guides 10.1, 10.2 is carried out by means of the adjustment slide if necessary 7.1, 7.2 each have an electrical, pneumatic or hydraulic coupling element 7.1.1 or 7.2.1.

Die Drahtführungen 10.1 des Längsträgers 1 besitzen je eine Drahthalterung 11.1 und die Drahtführungen 10.2 des Längsträgers 2 besitzen je eine Drahthalterung 11.2. Die Drahthalterungen 11.1, 11.2 sind als Kipphebel 11.1 bzw. 11.2 ausgebildet, indem sie um eine parallel zum Längsträger 1 bzw. 2 verlaufende Schwenkachse 12.1 bzw. 12.2 schwenkbar gelagert sind. Die Kipphebel 11.1, 11.2 besitzen am Fußende jeweils leicht geneigte Anschlagflächen 11.1.1 bzw. 11.2.1, die den Schwenkbereich der Kipphebel 11.1, 11.2 begrenzen.The wire guides 10.1 of the longitudinal beam 1 each have one Wire holder 11.1 and the wire guides 10.2 of the side member 2 each have a wire holder 11.2. The wire holders 11.1, 11.2 are as rocker arms 11.1 and 11.2 formed by a parallel to the longitudinal beam 1 or 2 extending pivot axis 12.1 or 12.2 pivotable are stored. The rocker arms 11.1, 11.2 have at the foot end slightly inclined stop surfaces 11.1.1 and 11.2.1, that limit the swivel range of the rocker arms 11.1, 11.2.

Am Kopfende 11.1.2 bzw. 11.2.2 eines Armes 11.1.3 bzw. 11.2.3 der Kipphebel 11.1, 11.2, der im Winkel (α), insbesondere im rechten Winkel, zu der durch die Längsträger 1, 2 aufgespannten virtuellen Ebene 13 verläuft, ist je ein Ende 14.1 bzw. 14.2 eines Schneiddrahtes 14 befestigt. Die Längsachse 14.3 des Schneiddrahtes 14 verläuft parallel zu der durch die Längsträger 1 und 2 gebildeten virtuellen Ebene 13 von einem Kipphebel 11.1 zum anderen Kipphebel 11.2. Die Kipphebel 11.1 des Längsträgers 1 sind durch je ein Federelement 15 derart vorgespannt, daß der Schneiddraht 14 gespannt wird. Der Schneiddraht 14 ist somit durch die schwenkbar gelagerten Kipphebel 11.1, 11.2 entgegen der Kraft des Federelements 15 in Richtung seiner Längsachse 14.3 hin und her verschiebbar.At the head end 11.1.2 or 11.2.2 of an arm 11.1.3 or 11.2.3 the rocker arm 11.1, 11.2, the angle (α), in particular at right angles to that through the side members 1, 2 spanned virtual level 13 is one end 14.1 and 14.2 of a cutting wire 14 attached. The longitudinal axis 14.3 of the cutting wire 14 runs parallel to the virtual plane 13 formed by the longitudinal beams 1 and 2 from one rocker arm 11.1 to another rocker arm 11.2. The Rocker arms 11.1 of the side member 1 are each one Spring element 15 biased such that the cutting wire 14th is excited. The cutting wire 14 is thus through the pivoted rocker arms 11.1, 11.2 against Force of the spring element 15 in the direction of its longitudinal axis 14.3 can be moved back and forth.

Am Längsträger 2 ist ein Exzenterantrieb 16 (siehe Fig. 2) um eine Lagerachse 17 schwenkbar angebracht. Das Schwenken erfolgt über einen Hydraulikzylinder 18. Das Pleuel 16.1 des Exzenterantriebs 16 ist über ein Gelenk 19 an einem Hebel 20.1 eines parallel zum Längsträger 2 verlaufenden Stabes 20 angelenkt, der um eine ebenfalls parallel zum Längsträger 2 verlaufende Achse 21 schwenkbar ist.On the side member 2 there is an eccentric drive 16 (see FIG. 2) attached pivotally about a bearing axis 17. The panning takes place via a hydraulic cylinder 18. The connecting rod 16.1 des Eccentric drive 16 is via a joint 19 on a lever 20.1 a rod 20 running parallel to the longitudinal beam 2 articulated, which is also parallel to the side member 2 extending axis 21 is pivotable.

Der Stab 20 besitzt einen sich über den gesamten Verstellbereich der Kipphebel 11.2 entlang der Längsschiebeführungen 8.2, 9.2 erstreckenden Nocken 20.2. Der Nocken 20.2 liegt in Betriebsposition des Exzenterantriebs 16, beispielsweise am Arm 11.2.3 aller Kipphebel 11.2 oder, wie beim Ausführungsbeispiel dargestellt, an einem besonderen Hebelarm 11.2.4 derselben an. Dabei werden das Federelement 15 und somit auch der Schneiddraht 14 gespannt. Bei Betrieb des Exzenterantriebs 16 führt daher der Stab 20 eine Schwenkbewegung entsprechend dem Exzenterhub aus. Dieser Exzenterhub bewirkt eine Hin- und Her-Bewegung des Schneiddrahtes 14. Dabei entspricht der Schneidhub 22 des Schneiddrahtes 14 dem Verstellwinkel (β) des Stabes 20 und seines Nockens 20.2 entsprechend dem Exzenterhub direkt oder, je nach Wahl der Länge und Anordnung des Hebels 20.1, entsprechend vermindert oder vergrößert.The rod 20 has one over the entire adjustment range the rocker arm 11.2 along the longitudinal sliding guides 8.2, 9.2 extending cams 20.2. The cam 20.2 is in Operating position of the eccentric drive 16, for example on Arm 11.2.3 of all rocker arms 11.2 or, as in the embodiment shown, on a special lever arm 11.2.4 the same. The spring element 15 and thus also the cutting wire 14 stretched. When operating the eccentric drive 16 therefore the rod 20 performs a pivoting movement according to the eccentric stroke. This eccentric stroke causes a back and forth movement of the cutting wire 14 corresponds to the cutting stroke 22 of the cutting wire 14 the adjustment angle (β) of the rod 20 and its cam 20.2 according to the eccentric stroke directly or, depending on the choice of Length and arrangement of the lever 20.1, reduced accordingly or enlarged.

Der Exzenterantrieb 16 bildet somit zusammen mit dem Stab 20 und dessen Nocken 20.2 einen Nockentrieb für den Schneiddraht 14 und somit auch für alle auf den Längsträgern 1, 2 vorhandenen Drahtführungen 10.1, 10.2 mit ihren Kipphebeln 11.1, 11.2 sowie deren damit gespannten Schneiddrähten 14.The eccentric drive 16 thus forms together with the rod 20 and its cam 20.2 a cam drive for the cutting wire 14 and thus also for everyone on the longitudinal beams 1, 2 existing wire guides 10.1, 10.2 with their rocker arms 11.1, 11.2 and their cutting wires 14 so tensioned.

Anstelle eines einzigen, allen Kipphebeln 11.2 gemeinsamen Nockens 20.2 können auch je Kipphebel 11.2 jeweils ein diesen einzeln zugeordneter Nocken vorhanden sein, wobei dann diese Nocken entsprechend der möglichen Verstellung der Kipphebel 11.2 zwecks Verstellung der Position der Schneiddrähte 14 mit verstellt werden müssen.Instead of a single, all rocker arms 11.2 common Cam 20.2 can also be used for each rocker arm 11.2 these individually assigned cams are present, whereby then these cams according to the possible adjustment of the Rocker arm 11.2 to adjust the position of the cutting wires 14 must be adjusted with.

Bei einer Schneidvorrichtung mit Anwendung von elektrisch beheizten Schneiddrähten ist die eine Längsschiebeführung 8.1 oder 9.1 bzw. 8.2 bzw. 9.2 der Längsträger 1, 2 als Stromschiene ausgebildet, über die den Heizdrähten die Heizspannung zugeführt werden kann. Die Zuführung der Heizspannung erfolgt bevorzugt über die jeweilige Drahtführung 10.1 bzw. 10.2 und die Drahthalterung bzw. die Kipphebel 11.1 bzw. 11.2.With a cutting device using electrical heated cutting wire is a longitudinal sliding guide 8.1 or 9.1 or 8.2 or 9.2 of the side members 1, 2 as Conductor rail formed over which the heating wires the heating voltage can be supplied. The feeding of the Heating voltage is preferably via the respective wire guide 10.1 or 10.2 and the wire holder or the rocker arm 11.1 or 11.2.

Die Schneiddrahtfrequenz beträgt günstigerweise etwa 20 Hz bis 100 Hz, insbesondere etwa 40 Hz. Der Schneiddrahthub 22 beträgt etwa 5 mm bis 30 mm, bei Anwendung in Anlagen mit elektrisch beheizten Schneiddrähten 14 vorzugsweise etwa 5 mm bis 15 mm, insbesondere etwa 10 mm. The cutting wire frequency is advantageously about 20 Hz up to 100 Hz, in particular about 40 Hz. The cutting wire stroke 22 is about 5 mm to 30 mm when used in systems with electrically heated cutting wires 14 preferably about 5 mm to 15 mm, in particular about 10 mm.

Die Wirkungsweise der erfindungsgemäßen Schneidvorrichtung ist folgende:The operation of the cutting device according to the invention is the following:

Vor Inbetriebnahme der Schneidvorrichtung werden nacheinander über die Einstellschlitten 7.1 und 7.2 durch Kupplung mit jeweils einander zugeordneten Drahtführungen 10.1 und 10.2 die Schneiddrähte 14 in die für den gewünschten Schneidvorgang erforderliche Längsposition gebracht und in dieser Position lagejustiert. In Entkupplungsstellung der Einstellschlitten 7.1 und 7.2 wird der in die Betriebslage geschwenkte Exzenterantrieb 16 in Betrieb gesetzt. Hierdurch wird der Stab 20 in Schwenkbewegung versetzt. Dadurch führen über den gemeinsamen Nocken 20.2 alle Kipphebel 11.2 entgegen der Kraft des Federelements 15 eine Schwenkbewegung aus. Hierdurch führen die Schneiddrähte 14 bei einer der Hubfrequenz des Exzenters 16 entsprechenden Schneidfrequenz einen dem Exzenterhub direkt entsprechenden oder einen über- oder untersetzten Schneidhub 23 aus. Die zu schneidenden Schaumstoffblöcke werden in diesem Betriebszustand durch den Schneidrahmen transportiert und - falls gewünscht - unter Beheizung der Schneiddrähte 14 zerschnitten. Es ist auch möglich, die zu zerschneidenden Schaumstoffblöcke zu fixieren und den Schneidrahmen zu bewegen, wobei die Schneiddrähte 14 durch den oder durch die Schaumstoffblöcke geschoben werden.Before putting the cutter into operation one after the other on the adjustment slides 7.1 and 7.2 Coupling with wire guides assigned to each other 10.1 and 10.2 the cutting wires 14 in the for required longitudinal position required cutting process brought and adjusted in this position. In Decoupling position of the adjustment slides 7.1 and 7.2 is the eccentric drive pivoted into the operating position 16 in Operation set. This causes the rod 20 to pivot transferred. This will lead over the common Cam 20.2 all rocker arms 11.2 against the force of Spring element 15 a pivoting movement. Do this the cutting wires 14 at one of the stroke frequency of the eccentric 16 cutting frequency corresponding to the eccentric stroke directly corresponding or a translated or reduced Cutting stroke 23 from. The foam blocks to be cut are in this operating state by the cutting frame transported and - if desired - under heating of the Cutting wires 14 cut. It is also possible to do that too cutting foam blocks to fix and To move the cutting frame, the cutting wires 14 through to be pushed through or through the foam blocks.

Nach dem Schneidvorgang wird der Exzenterantrieb 16 abgeschaltet und gegebenenfalls zwecks Neueinstellung der Schneiddrähte 14 in die Position geschwenkt, in welcher der Nocken 20.2 außer Wirkverbindung mit den Kipphebeln 11.2 ist. After the cutting process, the eccentric drive 16 switched off and, if necessary, to reset the Cutting wires 14 pivoted into the position in which the Cam 20.2 out of operative connection with the rocker arms 11.2 is.

Nach Neueinstellung der Schneiddrähte 14 kann der Schneidprozeß wieder in der angegebenen Weise durchgeführt werden.After readjusting the cutting wires 14, the cutting process can be carried out again in the specified manner.

Claims (13)

Schneidvorrichtung zum Schneiden von thermisch bearbeitbarem Material, insbesondere von aus Polystyrol bestehenden Schaumstoffblöcken, mit im Abstand von einander gegenüberliegenden Längsträgern, auf denen eine Mehrzahl von Drahtführungen längs derselben verstellbar vorgesehen ist, welche je einen Drahthalter aufweisen, wobei zwischen den Drahthaltern des einen, ersten Längsträgers und denjenigen des anderen, zweiten Längsträgers jeweils ein Schneiddraht eingespannt oder einspannbar ist, dadurch gekennzeichnet, daß die insbesondere elektrisch beheizten oder beheizbaren Schneiddrähte (14) während des Schneidvorgangs in Richtung ihrer Längsachse (14.3) dadurch oszillierend hin- und herbewegbar sind, daß die dem zweiten Längsträger (2) zugeordneten Drahthalter (11.2) als um eine senkrecht zur Längsachse (14.3) der Schneiddrähte (14) verlaufende Schwenkachse (11.2.3) schwenkbar gelagerte Kipphebel (11.2) ausgebildet sind, an deren im Winkel (α), insbesondere senkrecht zu der durch die Längsträger (1, 2) aufgespannten virtuellen Ebene (13) abstehendem Arm (11.2.3) das eine Ende (14.2) des zugeordneten Schneiddrahtes (14) befestigt ist, und daß jeder Arm (11.2.3) dieser Kipphebel (11.2) über je ein am anderen Ende (14.1) des Schneiddrahtes (14) unmittelbar oder mittelbar angreifendes Federelement (15) in Spannrichtung des Schneiddrahtes (14) vorgespannt oder vorspannbar ist, und daß alle Arme (11.2.3) oder Hebelarme (11.2.4) der Kipphebel (11.2) des zweiten Längsträgers (2) gemeinsam über einen Nockentrieb (16, 20, 20.2) entgegen der Federkraft der Federelemente (15) um einen den Schneidhub (22) der Schneiddrähte (14) bestimmenden Winkel (β) auslenkbar sind.Cutting device for cutting thermally machinable material, especially polystyrene existing foam blocks, with spaced apart opposite longitudinal beams on which a plurality of Wire guides are provided adjustable along the same, which each have a wire holder, with between the Wire holders of one, first side member and one of the other, second longitudinal beam, one cutting wire each is clamped or clamped, characterized in that that the in particular electrically heated or heatable Cutting wires (14) during the cutting process in the direction their longitudinal axis (14.3) oscillating back and forth can be moved here so that the second longitudinal member (2) assigned wire holder (11.2) than by a perpendicular to the Longitudinal axis (14.3) of the cutting wires (14) extending Swivel axis (11.2.3) pivoting rocker arm (11.2) are formed, at the angle (α), in particular perpendicular to that spanned by the longitudinal beams (1, 2) virtual plane (13) protruding arm (11.2.3) one end (14.2) the associated cutting wire (14) is attached, and that each arm (11.2.3) of this rocker arm (11.2) over each one at the other end (14.1) of the cutting wire (14) directly or indirectly acting spring element (15) in Clamping direction of the cutting wire (14) biased or is biased and that all arms (11.2.3) or lever arms (11.2.4) the rocker arm (11.2) of the second side member (2) together via a cam drive (16, 20, 20.2) against the Spring force of the spring elements (15) around the cutting stroke (22) of the cutting wires (14) determining the angle (β) are deflectable. Schneidvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Federelement (15) jeweils zwischen dem anderen Ende (14.1) des Schneiddrahtes (14) und seinem diesen zugeordneten, auf dem ersten Längsträger (1) längsverstellbaren Drahthalter (11.1) vorgesehen ist.Cutting device according to claim 1, characterized characterized in that the spring element (15) between each the other end (14.1) of the cutting wire (14) and its assigned to them on the first longitudinal member (1) longitudinally adjustable wire holder (11.1) is provided. Schneidvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Drahthalterung (11.1) des ersten Längsträgers (1) als zum Einspannen des Schneiddrahtes (14) dienender Kipphebel (11.1) ausgebildet ist, welcher um eine parallel zur Achse des Längsträgers (1) verlaufende Schwenkachse (12.1) schwenkbar gelagert ist, und daß das Federelement (15) zwischen der Drahtführung (10.1) und dem Kipphebel (11.1) eingespannt ist.Cutting device according to claim 1 or 2, characterized characterized in that the wire holder (11.1) of the first Side member (1) as for clamping the cutting wire (14) serving rocker arm (11.1) is formed, which by one Swivel axis running parallel to the axis of the side member (1) (12.1) is pivotally mounted, and that Spring element (15) between the wire guide (10.1) and the Rocker arm (11.1) is clamped. Schneidvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Kipphebel (11.1, 11.2) Anschlagflächen (11.1.1, 11.2.1) besitzen, die den Auslenkbereich derselben begrenzen. Cutting device according to one of claims 1 to 3, characterized in that the rocker arms (11.1, 11.2) Stop surfaces (11.1.1, 11.2.1) have the deflection area limit the same. Schneidvorrichtung nach einem der Anspüche 1 bis 4, dadurch gekennzeichnet, daß die den Kipphebeln (11.2) des zweiten Längsträgers (2) zugeordneten Nocken oder ein allen Kipphebeln (11.2) desselben zugeordneter gemeinsamer Nocken (20.2) des Nockentriebs (16, 20, 20.2) aus dem Wirkungsbereich der Kipphebel (11.2) herausbewegbar sind bzw. ist.Cutting device according to one of claims 1 to 4, characterized in that the the rocker arms (11.2) of the second longitudinal member (2) assigned cams or all Rocker arms (11.2) of the same associated common cam (20.2) of the cam drive (16, 20, 20.2) from the effective range the rocker arm (11.2) can be moved out. Schneidvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß in herausbewegtem Zustand der bzw. des Nockens (20.2) die Schneiddrähte (14) entspannt sind und in diesem Zustand die Drahtführungen (10.1, 10.2) längsverstellbar und lagejustierbar sind.Cutting device according to claim 5, characterized in that in the moved-out state of the cam (20.2) the cutting wires (14) are relaxed and in this Condition of the wire guides (10.1, 10.2) longitudinally adjustable and are adjustable. Schneidvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Nockentrieb (16, 20, 20.2) einen sich über den gesamten Verstellbereich der Drahtführungen (10.2) des zweiten Längsträgers (2) erstreckenden, um seine Längsachse oder um einen parallel zu dieser verlaufenden Achse (21) drehbaren oder schwenkbaren Stab (20) besitzt, der mit einer der Anzahl der Kipphebel (11.2) entsprechenden Anzahl von Nocken versehen ist oder nur einen einzigen, sich über den gesamten Verstellbereich erstreckenden, allen Kipphebeln (11.2) des zweiten Längsträgers (2) zugeordneten Nocken (20.2) aufweist.Cutting device according to one of claims 1 to 6, characterized in that the cam drive (16, 20, 20.2) one over the entire adjustment range of the Wire guides (10.2) of the second side member (2) extending around its longitudinal axis or parallel to one this extending axis (21) rotatable or pivotable Has rod (20) with one of the number of rocker arms (11.2) corresponding number of cams is provided or only one, over the entire adjustment range extending, all rocker arms (11.2) of the second Has longitudinal member (2) assigned cams (20.2). Schneidvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Kipphebel (11.2) des zweiten Längsträgers (2) einen im Winkel zu ihrem Arm (11.2.3) abstehenden Hebelarm (11.2.4) besitzen, der mit den bzw. dem Nocken (20.2) des Nockentriebs (16, 20, 20.2) zusammenwirkt bzw. zusammenwirken kann. Cutting device according to one of claims 1 to 7, characterized in that the rocker arm (11.2) of the second Side member (2) protrudes at an angle to her arm (11.2.3) Have lever arm (11.2.4) with the Cam (20.2) of the cam drive (16, 20, 20.2) cooperates or can work together. Schneidvorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der Stab (20) einen abstehenden Hebel (20.1) besitzt, der mit einem Pleuel (16.1) eines Exzenterantriebs (16) gelenkig verbunden ist.Cutting device according to claim 7, characterized characterized in that the rod (20) has a protruding lever (20.1) has one with a connecting rod (16.1) Eccentric drive (16) is articulated. Schneidvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Nockentrieb (16, 20, 20.2) am zweiten Längsträger (2) derart schwenkbar angebracht ist, daß in seiner einen Schwenkstellung die Nocken bzw. der gemeinsame Nocken (20.2) aus dem Wirkungsbereich der Kipphebel (11.2) herausbewegbar sind bzw. ist, und daß in einer zweiten Schwenkstellung die bzw. der gemeinsame Nocken (20.2) in Wirkverbindung mit den Kipphebeln (11.2) sind bzw. ist.Cutting device according to one of claims 1 to 9, characterized in that the cam drive (16, 20, 20.2) is pivotably attached to the second side member (2), that in its one swivel position the cam or common cams (20.2) from the effective range of the Rocker arm (11.2) can be moved out, and that in a second pivot position, the common cam (20.2) are in operative connection with the rocker arms (11.2) or is. Schneidvorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß jeder Längsträger (1, 2) je zwei Längsschiebeführungen (8.1, 9.1 bzw. 8.2, 9.2) besitzt, auf denen die Drahtführungen (10.1 bzw. 10.2) zusammen mit ihrem jeweiligen Kipphebel (11.1 bzw. 11.2) zwecks Einstellung der Schneiddrähte (14) längsverstellbar und justierbar gehaltert sind.Cutting device according to one of claims 1 to 10, characterized in that each longitudinal beam (1, 2) has two Has longitudinal sliding guides (8.1, 9.1 or 8.2, 9.2) which the wire guides (10.1 or 10.2) together with their respective rocker arm (11.1 or 11.2) for the purpose of adjusting the Cutting wires (14) adjustable and adjustable are. Schneidvorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß jeweils die eine der beiden Längsschiebeführungen (8.1 oder 9.1 bzw. 8.2 oder 9.2) der Längsträger (1, 2) als Stromschiene für die Zuführung einer Heizspannung an die Schneiddrähte (14) über ihre zugeordneten Drahtführungen (10.1 bzw. 10.2) und Drahthalter (11.1 bzw. 11.2) ausgebildet ist. Cutting device according to claim 11, characterized in that each one of the two longitudinal sliding guides (8.1 or 9.1 or 8.2 or 9.2) of the side members (1, 2) as a busbar for supplying a heating voltage to the cutting wires (14) via their assigned wire guides (10.1 or 10.2) and wire holder (11.1 or 11.2) is trained. Schneidvorrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß an jedem Längsträger (1, 2) zumindest je eine in deren Längsrichtung verlaufende Linearführung (6.1 bzw. 6.2) vorgesehen ist, auf deren je ein mit einem Kupplungsglied (7.1.1 bzw. 7.2.1) versehener Einstellschlitten (7.1 bzw. 7.2) verschiebbar geführt und antreibbar ist, und daß die Kupplungsglieder (7.1.1 bzw. 7.1.2) elektrisch oder hydraulisch betätigbar und jeweils mit einer Drahtführung (10.1 bzw. 10.2) kuppelbar und über den zugehörigen Einstellschlitten (7.1 bzw. 7.2) mit einer angekuppelten Drahtführung (10.1 bzw. 10.2) dann verstellbar ist, wenn die jeweils zugehörigen Nocken bzw. der gemeinsame Nocken (20.2) aus dem Wirkungsbereich der Kipphebel (11.2) des zweiten Längsträgers (2) herausbewegt sind bzw. ist.Cutting device according to one of claims 1 to 12, characterized in that on each side member (1, 2) at least one linear guide each running in its longitudinal direction (6.1 or 6.2) is provided, on each of which with an adjustment slide provided with a coupling link (7.1.1 or 7.2.1) (7.1 or 7.2) slidably guided and driven and that the coupling members (7.1.1 or 7.1.2) electrically or hydraulically operated and each with one Wire guide (10.1 or 10.2) can be coupled and over the associated adjustment slide (7.1 or 7.2) with a coupled wire guide (10.1 or 10.2) then adjustable is when the respective associated cams or the common Cam (20.2) from the area of action of the rocker arm (11.2) of the second side member (2) are moved out.
EP99101185A 1998-01-30 1999-01-22 Cutting device with oscillating cutting wires Expired - Lifetime EP0933171B1 (en)

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DE29801499U DE29801499U1 (en) 1998-01-30 1998-01-30 Cutting device for cutting thermally processable material
DE29801499U 1998-01-30

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DE102007025120A1 (en) 2007-05-24 2008-11-27 Mai, Verena Cutting jig for polystyrene noise insulation panel has a curved edge guide
DE102008014589A1 (en) 2008-03-12 2009-09-17 Mai, Verena Mobile cutting tool for cutting foamed polystyrene, has heating wire arranged at holder, and support body for workpiece provided between heating wire and holder, where holder is movably guided with heating wire against support body
CN101664935B (en) * 2008-09-01 2012-05-23 深圳华中数控有限公司 Sponge cutting machine
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DE202009007199U1 (en) 2009-05-16 2009-09-03 Mai, Verena Cutting device for heat-separated body
DE202009007198U1 (en) 2009-05-16 2009-09-03 Mai, Verena Cutting device for heat-separated body
DE202009007197U1 (en) 2009-05-16 2009-08-13 Mai, Verena Cutting device with an electric heating wire for heat-separated body
DE102009033986A1 (en) 2009-07-18 2011-01-20 Mai, Verena Hand guided cutting device has heating wire for body separated by heat effect, where ends or end areas of longitudinally extending and partly elastic device have mounting devices for heating wire
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EP0933171B1 (en) 2003-11-05
DE29801499U1 (en) 1999-06-02
ATE253437T1 (en) 2003-11-15
DE59907578D1 (en) 2003-12-11
EP0933171A3 (en) 2000-08-30

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