EP2521637A1 - Device for splitting foam bodies - Google Patents

Device for splitting foam bodies

Info

Publication number
EP2521637A1
EP2521637A1 EP10801160A EP10801160A EP2521637A1 EP 2521637 A1 EP2521637 A1 EP 2521637A1 EP 10801160 A EP10801160 A EP 10801160A EP 10801160 A EP10801160 A EP 10801160A EP 2521637 A1 EP2521637 A1 EP 2521637A1
Authority
EP
European Patent Office
Prior art keywords
layer
conveying element
foam body
splitting
removal
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
EP10801160A
Other languages
German (de)
French (fr)
Other versions
EP2521637B1 (en
Inventor
Norbert Leyens
Stefan Lennartz
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.)
Fecken-Kirfel & Co KG GmbH
Fecken Kirfel GmbH and Co KG
Original Assignee
Fecken-Kirfel & Co KG GmbH
Fecken Kirfel GmbH and Co KG
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 Fecken-Kirfel & Co KG GmbH, Fecken Kirfel GmbH and Co KG filed Critical Fecken-Kirfel & Co KG GmbH
Publication of EP2521637A1 publication Critical patent/EP2521637A1/en
Application granted granted Critical
Publication of EP2521637B1 publication Critical patent/EP2521637B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/28—Splitting layers from work; Mutually separating layers by cutting
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical 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
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/28—Splitting layers from work; Mutually separating layers by cutting
    • B26D3/281—Splitting layers from work; Mutually separating layers by cutting the work being simultaneously deformed by the application of pressure to obtain profiled workpieces
    • 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
    • Y10T83/04—Processes
    • Y10T83/0448—With subsequent handling [i.e., of product]
    • 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
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • 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
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2192—Endless conveyor

Definitions

  • the invention relates to a device for splitting foam bodies, comprising an endless band knife, which has a cutting edge for splitting off a layer from the foam body, and a removal device for removing the layer from the foam body.
  • the body When splitting foam bodies such as sheets or blocks, the body is slid on a sliding table or a conveyor belt through a cutting unit in which a band knife rotates, which splits off the uppermost layer of the body.
  • the task for the operator of the machine is often to take the layers out of the machine directly after the splitting process.
  • no stiffness of the cut layers is any more present in some materials, so that the layers are no longer pushed forward by the incoming material and out of the cutting area after being cut off from the block. As a result, they remain limp in the cutting area, for example, lying on the knife guide.
  • DE 10 2007 040 610 describes a device in which an inner tube is surrounded by a perforated outer tube.
  • the inner tube includes a suction hole through which holes in the wall of the outer tube are connected in groups with a suction device, so that a suction effect is generated only at a part of the peripheral area.
  • the suction methods all presuppose that the material to be treated is impermeable to air.
  • the invention has for its object to provide a device for splitting foam body view, which allows trouble-free removal of a separated layer of material from a foam body and is also suitable for splitting thin unstable layers.
  • the device according to the invention is defined by the patent claim 1. It is characterized in that the removal device for removing the layer of the foam body has an electrostatically chargeable conveying element which removes the split-off layer from the foam body at the cutting point at which the cutting edge engages.
  • the invention takes place the removal of the split-layer of the foam body by electrostatic forces. In this way, even thin layers of less than 5 mm thickness can be controlled and safely removed.
  • the surface of the conveying element can be electrostatically charged positively or negatively by means of an electrical ionizing device. Since the material of the foam is grounded through the sliding table and by the contact with the knife or the knife guide, it behaves electrostatically neutral. Thus, the material is attracted by a positive or negative electrical charge of the conveyor element.
  • the split-off material is drawn immediately after the cut by the charge difference and the resulting electric field between the material and withdrawal tape to the removal tape and held there.
  • the main advantage over the previous methods and arrangements is that the uniform charging of the strip ensures a very uniform, homogeneous removal of the material from the knife guide. As a result, the split-off layer is split off from the residual material without changing tensile conditions and produces a very uniform cut without negative effects of the withdrawal on the layer.
  • the term "foam” is to be understood in the context of the present invention. It includes any type of cellular material including polyurethane foam, cell rubbers and neoprene as well as compact plastics without cells, rubber or PU elastomers.
  • the conveying element is a flexible endless belt which revolves around a deflection roller, wherein a first deflection roller is arranged at the point at which the cutting edge of the band blade engages the foam body.
  • a first deflection roller is arranged at the point at which the cutting edge of the band blade engages the foam body.
  • the removal device may be a belt conveyor having either an upper run or a lower run for discharging the split-off layer. From the belt conveyor, the split thin layer can be removed by an operator or an automated pickup. In both embodiments, it makes sense that the electrostatically charged conveyor element is synchronized with the speed of a sliding table carrying the foam body during processing, such that an adjustable speed difference is not more than 20 percent.
  • the device according to the invention also makes it possible to process a plurality of foam bodies next to one another and / or behind one another simultaneously in the same machine in order to produce a plurality of layers during a splitting operation. Such an operation is not possible in the previous devices, because there is required for each layer simultaneously cut one operator to remove the layer of a roller.
  • the electrically charged conveying element which consists of electrically non-conductive material, can be guided along an electrostatic charging device, for example an ionizing device, so that a homogeneous electrostatic charge takes place with each revolution of the belt.
  • the invention further relates to a method for splitting a foam body, wherein the removal of the split-off layer of the foam body is carried out by electrostatic attraction to a conveying element.
  • FIG. 1 shows a schematic side view of a first embodiment of a device for splitting foam bodies
  • FIG. 2 shows an enlarged view of the detail II of FIG. 1,
  • Figure 3 is a side view of a second embodiment of the device.
  • FIG. 4 is an enlarged view of the detail IV of FIG. 3.
  • a device which has a sliding table 10 which is horizontally displaceable, to move a show mstoff Archives 11 horizontally against a knife 12.
  • the knife 12 is part of a splitting device 13. It is also possible, the table 10th to arrange stationary and to move the splitting device 13.
  • the sliding table 10 includes means for retaining the foam body 11 thereon, for example a suction device.
  • the knife 12 is an endless band knife which rotates along a closed path around cutter discs (not shown).
  • the band knife 12 has a demanding cutting edge 12a. It is arranged at an acute angle to the surface of the display material body 11 and guided in a knife guide 15 of two guide plates 15 a, 15 b.
  • the knife guide 15 leaves the cutting edge 12 a of the knife 12 free, so that they can penetrate into the show mstoff emotions 11 to split off of the foam body 16 a layer.
  • the removal device 20 To remove the layer 16 is the removal device 20.
  • the removal device has a belt conveyor 21 with an endless conveyor element 22 which rotates about guide rollers 23, 24.
  • the belt conveyor 21 is oriented obliquely, the lower deflection roller 23 being arranged approximately tangentially to the surface of the foam body 11 before the layer 16 is split off.
  • the other guide roller 24 is arranged higher, so that the belt conveyor 21, the layer 16 promotes forward and upward, the transport takes place on the upper run 22a.
  • an electrostatic charging device 25 is arranged at a position at which the layer 16 is already removed from the conveying element 22, at which the conveying element 22 moves along.
  • the charging device 25 is here an ionization device for electrically charging the existing non-conductive material conveying element.
  • the charging device 25 acts in this embodiment on the lower run 22b of the conveying element.
  • the center of the guide roller 23 is arranged at a distance from the surface of the foam body, which corresponds to the radius of the guide roller plus at least the thickness of the layer 16.
  • the cutting edge 12a is located at the point of the layer 16, which is just lifted by the guide roller 23 of the foam body 11. The cutting edge 12a thus dives into the gusset of the foam material produced by the deflection roller 23. This means that the layer 16 is lifted off the foam body 11 directly at the cutting point and removed with the aid of the removal device 20. For a controlled and trouble-free continuous lifting and removing the layer 16 is possible.
  • the layer 16 rotates the guide roller 23 in an angular range which is greater than 90 degrees, before reaching the upper run 22a.
  • the layer 16 is thus folded back to a certain extent.
  • the embodiment of Figures 3 and 4 is similar to the first embodiment, with the difference that the material transport of the layer 16 "backwards", ie in the direction of the knife guide 15.
  • the guide roller 23 is also tangential to the surface of the uncleaved foam body 11th arranged, however, the belt conveyor 21 is arranged in this embodiment, that it covers the blade guide 15.
  • the layer 16 lays against the underside of the lower run 22b of the belt conveyor 21 and is effectively carried away "overhead”.
  • the charging device 25 is arranged opposite the upper run 22a. In any event, the charging device is arranged to charge the conveyor element 22 prior to entering the cutting area to ensure homogeneous charging.

Abstract

The invention relates to splitting off a thin layer (16) from a foam body (11) by means of a band knife (12). A removal device (20) lifting and removing the layer (16) from the cutting point comprises a belt conveyor (21) having a conveyor element (22) that can be electrostatically charged. Lifting and removing the layer (16) from the cutting point is done by the electrostatic attraction to the conveyor element.

Description

Vorrichtung zum Spalten von Schau mstoffkörpern  Device for splitting foam bodies
Die Erfindung betrifft eine Vorrichtung zum Spalten von Schaumstoffkörpern, mit einem endlosen Bandmesser, das eine Schneidkante zum Abspalten einer Schicht von dem Schaumstoffkörper aufweist, und mit einer Abnahmevorrichtung zum Entfernen der Schicht von dem Schaumstoffkörper. The invention relates to a device for splitting foam bodies, comprising an endless band knife, which has a cutting edge for splitting off a layer from the foam body, and a removal device for removing the layer from the foam body.
Beim Spalten von Schaumstoffkörpern wie Bahnen oder Blöcken wird der Körper auf einem Schiebetisch oder einem Transportband liegend durch ein Schneidaggregat geschoben, in dem ein Bandmesser umläuft, das die jeweils oberste Schicht von dem Körper abspaltet. Dabei besteht die Aufgabe für den Bediener der Maschine häufig darin, die Schichten direkt nach dem Spaltprozess aus der Maschine zu nehmen. Insbesondere beim Schneiden von sehr dünnen Schichten im Bereich kleiner als 5mm ist bei einigen Materialien keine Eigensteifigkeit der abgeschnittenen Schichten mehr vorhanden, so dass die Schichten nicht mehr durch das nachkommende Material vorwärts und aus dem Schneidbereich herausgeschoben werden, nachdem sie vom Block abgeschnitten wurden. Dadurch bleiben sie schlaff im Schneidbereich, z.B. auf der Messerführung liegen. Es sind Maschinen bekannt, bei denen die Schichten nach dem Schnitt weggeführt werden, indem sie über die Messerführung hinweg gleiten und hinter der Messerführung auf einem Transportband abtransportiert oder einem Tisch abgelegt werden. Eine solche Möglichkeit ist nur tauglich für Schichten, die genügend dick oder eigensteif sind, um durch das nachfolgende Material geschoben zu werden. Beim Schneiden von Schichten oder in der Papierverarbeitung kennt man Maschinen, die mit Saugwalzen arbeiten und so Schichten zum Transport an eine Walze ansaugen. Hierzu gibt es Ausführungen einer Saugförderwalze mit einem äußeren drehbaren Mantel, der auf den Umfang verteilte Sauglöcher aufweist. Hierbei werden die Schichten durch ein innerhalb der Hohlwalze mit Saugbohrungen eingebrachtes Vakuum an die Walze angesaugt und dadurch transportiert oder dem Bearbeitungsbereich entnommen. When splitting foam bodies such as sheets or blocks, the body is slid on a sliding table or a conveyor belt through a cutting unit in which a band knife rotates, which splits off the uppermost layer of the body. The task for the operator of the machine is often to take the layers out of the machine directly after the splitting process. In particular, when cutting very thin layers in the range smaller than 5 mm, no stiffness of the cut layers is any more present in some materials, so that the layers are no longer pushed forward by the incoming material and out of the cutting area after being cut off from the block. As a result, they remain limp in the cutting area, for example, lying on the knife guide. There are known machines in which the layers are led away after the cut by gliding over the knife guide away and transported behind the knife guide on a conveyor belt or placed on a table. Such a possibility is only suitable for layers that are sufficiently thick or intrinsically stiff to be pushed through the subsequent material. When cutting layers or in the paper processing one knows machines, which with Suction rollers work and suck so layers for transport to a roller. For this purpose, there are embodiments of a suction conveyor roller with an outer rotatable shell having distributed on the circumference suction holes. Here, the layers are sucked by a vacuum introduced within the hollow cylinder with suction holes to the roller and thereby transported or removed from the processing area.
In DE 10 2007 040 610 ist eine Vorrichtung beschrieben, bei der ein inneres Rohr von einem gelochten äußeren Rohr umgeben ist. Das innere Rohr enthält eine Saugbohrung, durch die Bohrungen in der Wand des äußeren Rohres gruppenweise mit einer Saugvorrichtung verbunden werden, so dass eine Saugwirkung nur an einem Teil des Umfangsbereiches erzeugt wird. Die Saugverfahren setzen sämtlich voraus, dass das zu behandelnde Material luftundurchlässig ist. DE 10 2007 040 610 describes a device in which an inner tube is surrounded by a perforated outer tube. The inner tube includes a suction hole through which holes in the wall of the outer tube are connected in groups with a suction device, so that a suction effect is generated only at a part of the peripheral area. The suction methods all presuppose that the material to be treated is impermeable to air.
Es sind Maschinen bekannt, bei denen elektrisch nicht oder wenig leitfähige Materialien zwecks mechanischer Bearbeitung mit Hilfe des elektrostatischen Effektes fixiert werden (DE 19 902 821). Speziell im Bereich der Vliesstoffbearbeitung werden Schichten mit Hilfe des elektrostatischen Effektes festgehalten (CN 1951788) oder transportiert (EP 1777182, EP 1702874). Auch gibt es Anwendungen, bei denen mit Hilfe von elektrostatischen Effekten z.B. Sandkörner an eine Fläche angezogen werden, so dass Sandpapier hergestellt wird, welches zu Schleifzwecken benutzt wird. There are known machines in which electrically non-conductive or less conductive materials for the purpose of mechanical processing using the electrostatic effect are fixed (DE 19 902 821). Especially in the area of nonwoven fabric processing, layers are retained by means of the electrostatic effect (CN 1951788) or transported (EP 1777182, EP 1702874). There are also applications where, by means of electrostatic effects, e.g. Sand grains are attracted to a surface so that sandpaper is produced which is used for sanding purposes.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Spalten von Schau mstoffkörpern zu schaffen, die ein störungsfreies Entfernen einer abgetrennten Materialschicht von einem Schaumstoffkörper ermöglicht und auch zum Abspalten dünner instabiler Schichten geeignet ist. Die erfindungsgemäße Vorrichtung ist durch den Patentanspruch 1 definiert. Sie ist dadurch gekennzeichnet, dass die Abnahmevorrichtung zum Entfernen der Schicht von dem Schau mstoffkörper ein elektrostatisch aufladbares Förderelement aufweist, das die abgespaltene Schicht an der Schneidstelle, an der die Schneidkante angreift, von dem Schaumstoffkörper entfernt. The invention has for its object to provide a device for splitting foam body view, which allows trouble-free removal of a separated layer of material from a foam body and is also suitable for splitting thin unstable layers. The device according to the invention is defined by the patent claim 1. It is characterized in that the removal device for removing the layer of the foam body has an electrostatically chargeable conveying element which removes the split-off layer from the foam body at the cutting point at which the cutting edge engages.
Erfindungsgemäß erfolgt das Abnehmen der abgespaltenen Schicht von dem Schaumstoffkörper durch elektrostatische Kräfte. Auf diese Weise können selbst dünne Schichten von weniger als 5 mm Dicke kontrolliert und sicher abgeführt werden. Die Oberfläche des Förderelements kann mit Hilfe einer elektrischen Ionisierungseinrichtung elektrostatisch positiv oder negativ aufgeladen werden. Da das Material des Schaumstoffs durch den Schiebetisch und durch den Kontakt zum Messer bzw. zur Messerführung geerdet ist, verhält es sich elektrostatisch neutral. Somit wird das Material durch eine positive oder negative elektrische Ladung des Förderelements angezogen. Das abgespaltene Material wird unmittelbar nach dem Schnitt durch die Ladungsdifferenz und das dadurch entstehende elektrische Feld zwischen Material und Entnahmeband zum Entnahmeband hingezogen und dort festgehalten. Der Hauptvorteil gegenüber den bisherigen Verfahren und Anordnungen ist der, dass durch die gleichmäßige Aufladung des Bandes ein sehr gleichmäßiges, homogenes Abziehen des Materials von der Messerführung gewährleistet wird. Dadurch wird die abgespaltene Schicht ohne wechselhafte Zugbedingungen vom Restmaterial abgespalten und ein sehr gleichmäßiger Schnitt ohne negative Auswirkungen des Abzugs auf die Schicht erzeugt. Der Begriff "Schaumstoff" ist im Rahmen der vorliegenden Erfindung weit zu verstehen. Er umfasst jegliche Art von zellulärem Material und unter anderem auch Polyurethanschaum, Zellkautschuke und Neopren sowie auch kompakte Kunststoffe ohne Zellen, Gummi oder PU-Elastomere. According to the invention takes place the removal of the split-layer of the foam body by electrostatic forces. In this way, even thin layers of less than 5 mm thickness can be controlled and safely removed. The surface of the conveying element can be electrostatically charged positively or negatively by means of an electrical ionizing device. Since the material of the foam is grounded through the sliding table and by the contact with the knife or the knife guide, it behaves electrostatically neutral. Thus, the material is attracted by a positive or negative electrical charge of the conveyor element. The split-off material is drawn immediately after the cut by the charge difference and the resulting electric field between the material and withdrawal tape to the removal tape and held there. The main advantage over the previous methods and arrangements is that the uniform charging of the strip ensures a very uniform, homogeneous removal of the material from the knife guide. As a result, the split-off layer is split off from the residual material without changing tensile conditions and produces a very uniform cut without negative effects of the withdrawal on the layer. The term "foam" is to be understood in the context of the present invention. It includes any type of cellular material including polyurethane foam, cell rubbers and neoprene as well as compact plastics without cells, rubber or PU elastomers.
Vorzugsweise ist das Förderelement ein flexibles endloses Band, das um eine Umlenkwalze umläuft, wobei eine erste Umlenkwalze an der Stelle angeordnet ist, an der die Schneidkante des Bandmessers an dem Schaumstoffkörper angreift. Dies ermöglicht eine relativ lange Abführstrecke für die abgespaltene Schicht. Außerdem besteht der Vorteil, dass das Förderelement an einer Aufladevorrichtung entlanggeführt werden kann, die an geeigneter Stelle untergebracht werden kann. Preferably, the conveying element is a flexible endless belt which revolves around a deflection roller, wherein a first deflection roller is arranged at the point at which the cutting edge of the band blade engages the foam body. This allows a relatively long discharge path for the split-layer. In addition, there is the advantage that the conveying element can be guided along a charging device, which can be accommodated at a suitable location.
Die Abnahmevorrichtung kann ein Bandförderer sein, der entweder einen Obertrum oder einen Untertrum zum Abführen der abgespaltenen Schicht aufweist. Von dem Bandförderer kann die abgespaltene dünne Schicht durch einen Bediener oder eine automatisierte Abnahmeeinrichtung abgenommen werden. Bei beiden Ausgestaltungen ist es sinnvoll, dass das elektrostatisch aufgeladene Förderelement mit der Geschwindigkeit eines Schiebetisches, der den Schaumstoffkörper während der Bearbeitung trägt, synchronisiert ist, derart, dass eine einstellbare Geschwindigkeitsdifferenz nicht mehr als 20 Prozent beträgt. The removal device may be a belt conveyor having either an upper run or a lower run for discharging the split-off layer. From the belt conveyor, the split thin layer can be removed by an operator or an automated pickup. In both embodiments, it makes sense that the electrostatically charged conveyor element is synchronized with the speed of a sliding table carrying the foam body during processing, such that an adjustable speed difference is not more than 20 percent.
Die erfindungsgemäße Vorrichtung erlaubt es auch, mehrere Schaumstoffkörper nebeneinander und/oder hintereinander gleichzeitig in derselben Maschine zu bearbeiten, um bei einem Spaltvorgang mehrere Schichten herzustellen. Eine solche Arbeitsweise ist bei den bisherigen Vorrichtungen nicht möglich, weil dort für jede gleichzeitig geschnittene Schicht je ein Bediener zum Abnehmen der Schicht von einer Walze erforderlich ist. Das elektrisch aufgeladene Förderelement, das aus elektrisch nicht leitendem Material besteht, kann an einer elektrostatischen Aufladevorrichtung, z.B. einer Ionisierungseinrichtung, entlanggeführt werden, so dass bei jedem Umlauf des Bandes eine homogene elektrostatische Aufladung erfolgt. The device according to the invention also makes it possible to process a plurality of foam bodies next to one another and / or behind one another simultaneously in the same machine in order to produce a plurality of layers during a splitting operation. Such an operation is not possible in the previous devices, because there is required for each layer simultaneously cut one operator to remove the layer of a roller. The electrically charged conveying element, which consists of electrically non-conductive material, can be guided along an electrostatic charging device, for example an ionizing device, so that a homogeneous electrostatic charge takes place with each revolution of the belt.
Die Erfindung betrifft ferner ein Verfahren zum Spalten eines Schaumstoffkörpers, wobei das Entfernen der abgespaltenen Schicht von dem Schau mstoffkörper durch elektrostatische Anziehung an ein Förderelement erfolgt. The invention further relates to a method for splitting a foam body, wherein the removal of the split-off layer of the foam body is carried out by electrostatic attraction to a conveying element.
Im Folgenden werden unter Bezugnahme auf die Zeichnungen Ausführungsbeispiele der Erfindung näher erläutert. In the following, embodiments of the invention will be explained in more detail with reference to the drawings.
Es zeigen : Show it :
Figur 1 eine schematische Seitenansicht einer ersten Ausführungsform einer Vorrichtung zum Spalten von Schaumstoffkörpern, 1 shows a schematic side view of a first embodiment of a device for splitting foam bodies,
Figur 2 eine vergrößerte Darstellung der Einzelheit II von Figur 1, FIG. 2 shows an enlarged view of the detail II of FIG. 1,
Figur 3 eine Seitenansicht einer zweiten Ausführungsform der Vorrichtung und Figure 3 is a side view of a second embodiment of the device and
Figur 4 eine vergrößerte Darstellung der Einzelheit IV von Figur 3. FIG. 4 is an enlarged view of the detail IV of FIG. 3.
In den Figuren 1 und 2 ist eine Vorrichtung dargestellt, die einen Schiebetisch 10 aufweist, der horizontal verschiebbar ist, um einen Schau mstoffkörper 11 horizontal gegen ein Messer 12 zu bewegen. Das Messer 12 ist Bestandteil einer Spaltvorrichtung 13. Es besteht auch die Möglichkeit, den Tisch 10 stationär anzuordnen und die Spaltvorrichtung 13 zu bewegen. Der Schiebetisch 10 enthält Mittel, um den Schaumstoffkörper 11 darauf festzuhalten, beispielsweise eine Saugvorrichtung. In the figures 1 and 2, a device is shown, which has a sliding table 10 which is horizontally displaceable, to move a show mstoffkörper 11 horizontally against a knife 12. The knife 12 is part of a splitting device 13. It is also possible, the table 10th to arrange stationary and to move the splitting device 13. The sliding table 10 includes means for retaining the foam body 11 thereon, for example a suction device.
Das Messer 12 ist ein endloses Bandmesser, das entlang einer geschlossenen Bahn um (nicht dargestellte) Messerscheiben herum umläuft. Das Bandmesser 12 weist eine fordere Schneidkante 12a auf. Es ist unter einem spitzen Winkel zu der Oberfläche des Schau mstoffkörpers 11 angeordnet und in einer Messerführung 15 aus zwei Führungsplatten 15a, 15b geführt. Die Messerführung 15 lässt die Schneidkante 12a des Messers 12 frei, so dass diese in den Schau mstoffkörper 11 eindringen kann, um von dem Schaumstoffkörper eine Schicht 16 abzuspalten. The knife 12 is an endless band knife which rotates along a closed path around cutter discs (not shown). The band knife 12 has a demanding cutting edge 12a. It is arranged at an acute angle to the surface of the display material body 11 and guided in a knife guide 15 of two guide plates 15 a, 15 b. The knife guide 15 leaves the cutting edge 12 a of the knife 12 free, so that they can penetrate into the show mstoffkörper 11 to split off of the foam body 16 a layer.
Zum Entfernen der Schicht 16 dient die Abnahmevorrichtung 20. Die Abnahmevorrichtung weist einen Bandförderer 21 mit einem endlosen Förderelement 22 auf, das um Umlenkwalzen 23, 24 umläuft. Der Bandförderer 21 ist schräg ausgerichtet, wobei die untere Umlenkwalze 23 etwa tangential zu der Oberfläche des Schaumstoffkörpers 11 vor dem Abspalten der Schicht 16 angeordnet ist. Die andere Umlenkwalze 24 ist höher angeordnet, so dass der Bandförderer 21 die Schicht 16 nach vorne und oben abfördert, wobei der Transport auf dem Obertrum 22a erfolgt. Im Verlaufe des Bandförderers 21 ist an einer Stelle, an der die Schicht 16 von dem Förderelement 22 bereits abgenommen ist, eine elektrostatische Aufladevorrichtung 25 angeordnet, an der sich das Förderelement 22 entlang bewegt. Die Aufladevorrichtung 25 ist hier eine Ionisierungseinrichtung zum elektrischen Aufladen des aus nicht leitendem Material bestehenden Förderelements. Die Aufladevorrichtung 25 wirkt bei diesem Ausführungsbeispiel auf den Untertrum 22b des Förderelements. Der Mittelpunkt der Umlenkwalze 23 ist in einem Abstand von der Oberfläche des Schaumstoffkörpers angeordnet, der dem Radius der Umlenkwalze zuzüglich mindestens der Dicke der Schicht 16 entspricht. Die Schneidkante 12a befindet sich an derjenigen Stelle der Schicht 16, die durch die Umlenkwalze 23 soeben von dem Schaumstoffkörper 11 abgehoben wird. Die Schneidkante 12a taucht also in den von der Umlenkwalze 23 erzeugten Zwickel des Schaumstoffmaterials. Dies bedeutet, dass die Schicht 16 unmittelbar an der Schneidstelle von dem Schaumstoffkörper 11 abgehoben und mit Hilfe der Abnahmevorrichtung 20 entfernt wird. Damit ist ein kontrolliertes und störungsfreies kontinuierliches Abheben und Entfernen der Schicht 16 möglich. To remove the layer 16 is the removal device 20. The removal device has a belt conveyor 21 with an endless conveyor element 22 which rotates about guide rollers 23, 24. The belt conveyor 21 is oriented obliquely, the lower deflection roller 23 being arranged approximately tangentially to the surface of the foam body 11 before the layer 16 is split off. The other guide roller 24 is arranged higher, so that the belt conveyor 21, the layer 16 promotes forward and upward, the transport takes place on the upper run 22a. In the course of the belt conveyor 21, an electrostatic charging device 25 is arranged at a position at which the layer 16 is already removed from the conveying element 22, at which the conveying element 22 moves along. The charging device 25 is here an ionization device for electrically charging the existing non-conductive material conveying element. The charging device 25 acts in this embodiment on the lower run 22b of the conveying element. The center of the guide roller 23 is arranged at a distance from the surface of the foam body, which corresponds to the radius of the guide roller plus at least the thickness of the layer 16. The cutting edge 12a is located at the point of the layer 16, which is just lifted by the guide roller 23 of the foam body 11. The cutting edge 12a thus dives into the gusset of the foam material produced by the deflection roller 23. This means that the layer 16 is lifted off the foam body 11 directly at the cutting point and removed with the aid of the removal device 20. For a controlled and trouble-free continuous lifting and removing the layer 16 is possible.
Bei dem Ausführungsbeispiel der Figuren 1 und 2 umläuft die Schicht 16 die Umlenkwalze 23 in einem Winkelbereich, der größer ist als 90 Grad, bevor sie den Obertrum 22a erreicht. Die Schicht 16 wird somit gewissermaßen zurückgefaltet. In the embodiment of Figures 1 and 2, the layer 16 rotates the guide roller 23 in an angular range which is greater than 90 degrees, before reaching the upper run 22a. The layer 16 is thus folded back to a certain extent.
Das Ausführungsbeispiel der Figuren 3 und 4 gleicht weitgehend dem ersten Ausführungsbeispiel, mit dem Unterschied, dass der Materialtransport der Schicht 16 "nach hinten" erfolgt, also in Richtung der Messerführung 15. Die Umlenkwalze 23 ist auch hier tangential zu der Oberfläche des ungespaltenen Schaumstoffkörpers 11 angeordnet, jedoch ist der Bandförderer 21 bei diesem Ausführungsbeispiel so angeordnet, dass er die Messerführung 15 überdeckt. Die Schicht 16 legt sich an die Unterseite des Untertrums 22b des Bandförderers 21 und wird gewissermaßen "über Kopf" abgefördert. Die Aufladevorrichtung 25 ist gegenüber dem Obertrum 22a angeordnet. In jedem Fall ist die Aufladevorrichtung so angeordnet, dass sie das Förderelement 22 vor dem Eintreten in den Schneidbereich aufladen kann, um eine homogene Aufladung sicherzustellen. Durch die Erfindung werden der Schneidvorgang und der Entnahmevorgang miteinander kombiniert. Von Bedeutung ist, dass nicht nur der Transport der Schicht 16 durch elektrostatische Anziehung erfolgt, sondern auch die Wegnahme und das Abheben unmittelbar nach dem Schneidvorgang. Dadurch wird erreicht, dass das abgespaltene Material gleichmäßig und mit konstantem Zug aus dem Schneidbereich heraus transportiert wird. The embodiment of Figures 3 and 4 is similar to the first embodiment, with the difference that the material transport of the layer 16 "backwards", ie in the direction of the knife guide 15. The guide roller 23 is also tangential to the surface of the uncleaved foam body 11th arranged, however, the belt conveyor 21 is arranged in this embodiment, that it covers the blade guide 15. The layer 16 lays against the underside of the lower run 22b of the belt conveyor 21 and is effectively carried away "overhead". The charging device 25 is arranged opposite the upper run 22a. In any event, the charging device is arranged to charge the conveyor element 22 prior to entering the cutting area to ensure homogeneous charging. By the invention of the cutting process and the removal process are combined. Significantly, not only is the transport of the layer 16 by electrostatic attraction, but also the removal and liftoff immediately after the cutting operation. This ensures that the split-off material is transported evenly and with constant tension out of the cutting area.

Claims

Patentansprüche claims
1. Vorrichtung zum Spalten von Schau mstoffkörpern (11), mit einem endlosen Bandmesser (12), das eine Schneidkante (12a) zum Abspalten einer Schicht (16) von dem Schaumstoffkörper (11) aufweist, und einer Abnahmevorrichtung (20) zum Entfernen der Schicht (16) von dem Schaumstoffkörper (11), d a d u r c h g e k e n n z e i c h n e t, dass die Abnahmevorrichtung (20) ein elektrostatisch aufladbares Förderelement (22) aufweist, das die abgespaltene Schicht (16) an der Schneidstelle, an der die Schneidkante (12a) angreift, von dem Schau mstoffkörper entfernt. An apparatus for splitting foam bodies (11), comprising an endless band knife (12) having a cutting edge (12a) for splitting a layer (16) from the foam body (11), and a removal device (20) for removing the Layer (16) of the foam body (11), characterized in that the removal device (20) comprises an electrostatically chargeable conveying element (22) which removes the split layer (16) from the cutting edge at which the cutting edge (12a) engages Look at the body of the body.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Förderelement (22) ein flexibles endloses Band ist, das um Umlenkwalzen (23, 24) umläuft, wobei eine erste Umlenkwalze (23) an der Schneidstelle angeordnet ist, an der die Schneidkante (12a) des Bandmessers (12) an dem Schaumstoffkörper (11) angreift. 2. Apparatus according to claim 1, characterized in that the conveying element (22) is a flexible endless belt which rotates about guide rollers (23, 24), wherein a first deflecting roller (23) is arranged at the cutting point at which the cutting edge ( 12a) of the band blade (12) acts on the foam body (11).
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Abnahmevorrichtung (20) ein Bandförderer (21) ist, der einen Obertrum (22a) zum Abführen der abgespaltenen Schicht (16) aufweist. 3. Apparatus according to claim 1 or 2, characterized in that the removal device (20) is a belt conveyor (21) having an upper run (22a) for discharging the split-layer (16).
4. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Abnahmevorrichtung (20) ein Bandförderer (21) ist, der einen Untertrum (22b) zum Abführen der abgespaltenen Schicht (16) aufweist. 4. Apparatus according to claim 1 or 2, characterized in that the removal device (20) is a belt conveyor (21) having a lower run (22b) for discharging the split-layer (16).
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Förderelement (22) ein aus elektrisch nicht leitendem Material bestehendes Band ist und dass im Verlauf des Bandes eine elektrostatische Aufladevorrichtung (25) stationär angeordnet ist. 5. Device according to one of claims 1 to 4, characterized in that the conveying element (22) is an existing electrically non-conductive material band and that in the course of the belt, an electrostatic charging device (25) is arranged stationary.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Aufladevorrichtung (25) eine Ionisierungseinrichtung aufweist. 6. Apparatus according to claim 5, characterized in that the charging device (25) has an ionization device.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Bewegung des Förderelements (22) mit der Geschwindigkeit des Schaumstoffkörpers (11) synchronisiert ist, derart, dass eine einstellbare Geschwindigkeitsdifferenz nicht mehr als 20 Prozent beträgt. 7. Device according to one of claims 1 to 6, characterized in that the movement of the conveying element (22) with the speed of the foam body (11) is synchronized, such that an adjustable speed difference is not more than 20 percent.
8. Verfahren zum Spalten eines Schaumstoffkörpers (11) mit einem umlaufenden Bandmesser (12), bei dem der Schaumstoffkörper (11) relativ zu dem Bandmesser (12) bewegt wird, um eine Schicht (16) abzuspalten, und bei dem die abgespaltene Schicht unmittelbar nach dem Abspalten von dem Schau mstoffkörper (11) fortlaufend entfernt wird, dadurch gekennzeichnet, dass dann das Abheben und Entfernen der Schicht von dem Materialkörper durch elektrostatische Anziehung an ein Förderelement (22) erfolgt. A method of splitting a foam body (11) with a rotating band knife (12) in which the foam body (11) is moved relative to the band knife (12) to cleave a layer (16) and wherein the cleaved layer immediately after removal from the show material body (11) is continuously removed, characterized in that then takes off and removing the layer of the material body by electrostatic attraction to a conveying element (22).
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Abheben und Entfernen der Schicht (16) durch das Förderelement (22) gleichmäßig und mit konstanter Zugkraft erfolgt. 9. The method according to claim 8, characterized in that the lifting and removal of the layer (16) by the conveying element (22) takes place uniformly and with constant tensile force.
EP10801160.2A 2010-01-08 2010-12-20 Device for splitting foam bodies Active EP2521637B1 (en)

Applications Claiming Priority (2)

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DE201010004205 DE102010004205B4 (en) 2010-01-08 2010-01-08 Apparatus and method for splitting foam bodies
PCT/EP2010/070264 WO2011083037A1 (en) 2010-01-08 2010-12-20 Device for splitting foam bodies

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EP2521637A1 true EP2521637A1 (en) 2012-11-14
EP2521637B1 EP2521637B1 (en) 2015-10-28

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US20120247290A1 (en) 2012-10-04
EP2521637B1 (en) 2015-10-28
TW201139091A (en) 2011-11-16
TWI520825B (en) 2016-02-11
CN102655994B (en) 2015-04-22
AU2010340907A1 (en) 2012-07-19
ES2554235T3 (en) 2015-12-17
DE102010004205B4 (en) 2012-11-08
WO2011083037A1 (en) 2011-07-14
CN102655994A (en) 2012-09-05
US10065332B2 (en) 2018-09-04
DE102010004205A1 (en) 2011-07-14
DK2521637T3 (en) 2016-01-18
AU2010340907B2 (en) 2014-12-04

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