EP0633073A1 - Method and apparatus for cutting and electrostatic dedusting of moving webs - Google Patents

Method and apparatus for cutting and electrostatic dedusting of moving webs Download PDF

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Publication number
EP0633073A1
EP0633073A1 EP94109463A EP94109463A EP0633073A1 EP 0633073 A1 EP0633073 A1 EP 0633073A1 EP 94109463 A EP94109463 A EP 94109463A EP 94109463 A EP94109463 A EP 94109463A EP 0633073 A1 EP0633073 A1 EP 0633073A1
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EP
European Patent Office
Prior art keywords
cutting
movement
web
dust
cutting tool
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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.)
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EP94109463A
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German (de)
French (fr)
Inventor
Eckhard Brandt
Rainer Kehrls
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.)
ECH Will GmbH and Co
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ECH Will GmbH and Co
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Publication date
Application filed by ECH Will GmbH and Co filed Critical ECH Will GmbH and Co
Publication of EP0633073A1 publication Critical patent/EP0633073A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B6/00—Cleaning by electrostatic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • B08B17/02—Preventing deposition of fouling or of dust

Definitions

  • the invention relates to a method for cutting moving webs of paper or similar material, in which at least one cutting tool generates dust during cutting, which is removed from the cutting zone.
  • the invention also relates to a device for cutting moving webs of paper or similar material which releases dust when cutting, with at least one cutting tool and a device for removing dust from the cutting zone.
  • the device mentioned at the outset is characterized by an electrostatic collecting device in the area of the cutting tool for the dust accumulating during the cutting. Further advantageous refinements of the device according to the invention can be found in the subordinate device claims.
  • the advantage of the invention over the above-mentioned prior art is that the electrostatic separation of dust is considerably less energy-intensive than the generation of suction air for the purpose of vacuuming the dust.
  • the invention is particularly advantageous when cutting so-called environmental paper with its large amount of dust.
  • FIG. 1 shows a so-called cross cutter 1 known per se with two knife carriers rotating in accordance with the arrows 2 and 3 in the form of knife rollers 4 and 6, on which cutting knives 7 and 8, transversely to the direction of movement 9 of the web 11 to be cut, made of paper, cardboard or cardboard or similar dust are attached when cutting material.
  • the knife rollers 4, 6 are driven by gear wheels 12 and 13, respectively, so that their knives 7 and 8 touch each other at the time of cutting, whereby they have the same peripheral speeds, and cut the webs 11 transversely to the direction of movement 9.
  • Such a cross cutter is e.g. B. is known from US-A-4,392,402.
  • the cutter rollers 4, 6 for separating / collecting the dust are assigned separating surfaces 16 and 17, respectively, which receive electrostatic charges from charge sources 18 and 19, respectively.
  • the separating surfaces can consist of plastic material.
  • the charge sources can be ionization sources, for example so-called ionization bars, as sold by Haug GmbH & Co. KG, D-2022, Echterdingen, DE.
  • isolated metallic separation surfaces 16, 17 can also be provided, which are then each connected to a high-voltage source 18 or 19.
  • FIG. 2 shows a so-called slitter 20, known per se, for a paper web 11, the cutting tool of which is designed as a circular knife arrangement 21.
  • the latter contains two circular knives 27 and 28 driven by gears 22, 23 according to the arrows 24 and 26, respectively, which cut the web 11 from paper, cardboard, cardboard or another material which releases dust during the cutting in the direction of its movement 9.
  • One of the circular knives 27, 28 need not be driven, but can run along empty.
  • a slitter is known from US-A-4,257,298.
  • the slitter 20 has an electrostatic separating or collecting device for the dust produced during slitting.
  • separating surfaces 29 and 31 on the side of the circular knives 27 and 28, which, like the separating surfaces 16 and 17, are made of plastic and can be provided with charges by charge sources 32 and 33 designed as ionization bars.
  • the deposition surfaces can also consist of metal and receive their charges from a high voltage source. The dust particles produced during cutting are moved by the charges to the separation surfaces 29, 30, collected there and removed from there in a suitable manner.
  • transverse and longitudinal cutters can be provided in a cutting system, for example as is known from US Pat. No. 3,916,743. Even in such a case, the use of electrostatic separating or collecting devices of the type described in FIGS. 1 and 2 is possible both with the cross cutter and with the longitudinal cutter.

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  • Details Of Cutting Devices (AREA)
  • Nonmetal Cutting Devices (AREA)

Abstract

A description is given of a method and a device for cutting moving webs of paper or similar material. Here, the dust occurring during cutting is to be removed in an advantageous way. To achieve this object, an electrostatic collecting or removing device is provided. The advantage of the electrostatic removal or collection of the dust generated in cutting consists in the fact that the energy otherwise necessary for producing suction air for sucking off the dust is reduced. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Schneiden von bewegten Bahnen aus Papier oder ähnlichem Material, bei dem mindestens ein Schneidwerkzeug beim Schneiden Staub erzeugt, der aus der Schneidzone entfernt wird.
Die Erfindung betrifft außerdem eine Vorrichtung zum Schneiden von bewegten Bahnen aus Papier oder ähnlichem beim Schneiden Staub abgebendem Material, mit mindestens einem Schneidwerkzeug und einer Vorrichtung zum Entfernen von Staub aus der Schneidzone.The invention relates to a method for cutting moving webs of paper or similar material, in which at least one cutting tool generates dust during cutting, which is removed from the cutting zone.
The invention also relates to a device for cutting moving webs of paper or similar material which releases dust when cutting, with at least one cutting tool and a device for removing dust from the cutting zone.

Beim Schneiden von Bahnen aus Papier oder einem ähnlichem Material, z. B. Karton oder Pappe, insbesondere von sogenanntem Umweltpapier mit seinem Gehalt an verholzten Fasern und gegebenenfalls Asche, entsteht Staub, der - zumindest zu einem großen Teil - entfernt werden muß. Die normalen Maßnahmen zum Entfernen von Staub sind Absaugeinrichtungen, die den in den Schnittzonen anfallenden Staub mittels Saugluft pneumatisch absaugen.
Die der Erfindung zugrundeliegende Aufgabe besteht darin, eine weitere Möglichkeit der Staubentfernung zu schaffen. Gemäß der Erfindung wird dies dadurch erreicht, daß der beim Schneiden anfallenden Staub elektrostatisch abgeschieden wird.
Weitere Ausgestaltungen des Verfahrens gemäß der Erfindung sind den untergeordneten Verfahrensansprüchen zu entnehmen.When cutting webs of paper or a similar material, e.g. B. cardboard or cardboard, especially of so-called environmental paper with its content of woody fibers and possibly ash, creates dust that - at least to a large extent - must be removed. The normal measures for removing dust are suction devices that pneumatically extract the dust accumulating in the cutting zones using suction air.
The object on which the invention is based is to provide a further possibility for removing dust. According to the invention, this is achieved in that the dust produced during cutting is separated electrostatically.
Further refinements of the method according to the invention can be found in the subordinate method claims.

Die eingangs genannte Vorrichtung ist gekennzeichnet durch eine elektrostatische Sammelvorrichtung im Bereich des Schneidwerkzeugs für den beim Schneiden anfallenden Staub. Weitere vorteilhafte Ausgestaltungen der Vorrichtung gemäß der Erfindung sind den Untergeordneten Vorrichtungsansprüchen zu entnehmen.The device mentioned at the outset is characterized by an electrostatic collecting device in the area of the cutting tool for the dust accumulating during the cutting. Further advantageous refinements of the device according to the invention can be found in the subordinate device claims.

Der Vorteil der Erfindung gegenüber dem obenerwähnten Stand der Technik besteht darin, daß die elektrostatische Abscheidung von Staub erheblich weniger energieintensiv ist als das Erzeugen von Saugluft zwecks Absaugens des Staubes. Die Erfindung ist insbesondere beim Schneiden von sogenanntem Umweltpapier mit seinem großen Staubanfall vorteilhaft.The advantage of the invention over the above-mentioned prior art is that the electrostatic separation of dust is considerably less energy-intensive than the generation of suction air for the purpose of vacuuming the dust. The invention is particularly advantageous when cutting so-called environmental paper with its large amount of dust.

Die Erfindung wird anhand von Ausführungsbeispielen näher erläutert.The invention is explained in more detail using exemplary embodiments.

Es zeigen:

Figur 1
schematisch einen sogenannten Querschneider zum Schneiden einer Bahn quer zu ihrer Bewegungsrichtung mit einer elektrostatischen Abscheidevorrichtung,
Figur 2
einen sogenannten Längsschneider zum Schneiden einer Bahn in Richtung ihrer Bewegung mit einer elektrostatischen Abscheidevorrichtung.
Show it:
Figure 1
schematically a so-called cross cutter for cutting a web transverse to its direction of movement with an electrostatic separating device,
Figure 2
a so-called slitter for cutting a web in the direction of its movement with an electrostatic separator.

Figur 1 zeigt einen sogenannten an sich bekannten Querschneider 1 mit zwei entsprechend den Pfeilen 2 und 3 umlaufenden Messerträgern in Form von Messerwalzen 4 bzw. 6 an denen Schneidmesser 7 bzw. 8 quer zur Bewegungsrichtung 9 der zu schneidenden Bahn 11 aus Papier, Karton, Pappe oder ähnlichem Staub beim Schneiden abgebendem Material befestigt sind. Die Messerwalzen 4, 6 werden durch Zahnräder 12 bzw. 13 so angetrieben, daß ihre Messer 7 bzw. 8 sich im Schnittzeitpunkt berühren, wobei sie gleiche Umfangsgeschwindigkeiten haben, und die Bahnen 11 quer zur Bewegungsrichtung 9 schneiden. Ein derartiger Querschneider ist z. B. durch die US-A-4 392 402 bekannt.
Beim Schneiden von Bahnen aus den vorgenannten Materialien, die auch aus anderem beim Schneiden Staub abgebendem Material bestehen können, fällt Staub an, der an einer Abscheide- oder Sammelvorrichtung entfernt werden soll. Gemäß der Erfindung sind den Messerwalzen 4, 6 zum Abscheiden/Sammeln des Staubes Abscheideflächen 16 bzw. 17 zugeordnet, die elektrostatische Ladungen von Ladungsquellen 18 bzw. 19 erhalten. Die Abscheideflächen können aus Kunststoffmaterial bestehen. Die Ladungsquellen können Ionisationsquellen, z.B. sogenannte Ionisationsstäbe, sein, wie sie die Firma Haug GmbH & Co. KG, D-2022, Echterdingen, DE, vertreibt. Alternativ können auch isoliert befestigte metallische Abscheideflächen 16, 17 vorgesehen sein, die dann jeweils mit einer Hochspannungsquelle 18 bzw. 19 verbunden sind. Die zugeführten Ladungen ziehen die beim Schneiden entstandenen Staubpartikel an und veranlassen sie zu einer Wanderung zu den Abscheideflächen 16 und 17, von denen sie in geeigneter Weise entfernt werden können. Die in Figur 1 oben und unten, d. h. über der Messerwalze 4 und unter der Messerwalze 6 angeordneten Abscheideflächen 16 bzw. 17 können auch seitlich von den Messerwalzen angeordnet sein , um ein besseres Reinigen, z. B. durch periodisches Abklopfen des Staubes, zu ermöglichen.FIG. 1 shows a so-called cross cutter 1 known per se with two knife carriers rotating in accordance with the arrows 2 and 3 in the form of knife rollers 4 and 6, on which cutting knives 7 and 8, transversely to the direction of movement 9 of the web 11 to be cut, made of paper, cardboard or cardboard or similar dust are attached when cutting material. The knife rollers 4, 6 are driven by gear wheels 12 and 13, respectively, so that their knives 7 and 8 touch each other at the time of cutting, whereby they have the same peripheral speeds, and cut the webs 11 transversely to the direction of movement 9. Such a cross cutter is e.g. B. is known from US-A-4,392,402.
When cutting webs from the aforementioned materials, which can also consist of other material which releases dust when cutting, dust is produced which is to be removed on a separating or collecting device. According to the invention, the cutter rollers 4, 6 for separating / collecting the dust are assigned separating surfaces 16 and 17, respectively, which receive electrostatic charges from charge sources 18 and 19, respectively. The separating surfaces can consist of plastic material. The charge sources can be ionization sources, for example so-called ionization bars, as sold by Haug GmbH & Co. KG, D-2022, Echterdingen, DE. Alternatively, isolated metallic separation surfaces 16, 17 can also be provided, which are then each connected to a high-voltage source 18 or 19. The supplied charges attract the dust particles formed during cutting and cause them to migrate to the separation surfaces 16 and 17, from which they can be removed in a suitable manner. The separating surfaces 16 and 17 arranged above and below in FIG. 1, ie above the knife roller 4 and below the knife roller 6, can also be arranged to the side of the knife rollers in order to facilitate cleaning, e.g. B. by periodically tapping the dust.

Figur 2 zeigt einen sogenannten an sich bekannten Längsschneider 20 für eine Papierbahn 11, dessen Schneidwerkzeug als Kreismesseranordnung 21 ausgebildet ist. Letztere enthält zwei über Zahnräder 22, 23 entsprechend den Pfeilen 24 bzw. 26 angetriebene Kreismesser 27 bzw. 28, die die Bahn 11 aus Papier, Karton, Pappe oder einem anderen beim Schneiden Staub abgebendem Material in Richtung ihrer Bewegung 9 schneiden. Eines der Kreismesser 27, 28 braucht nicht angetrieben zu sein, sondern kann leer mitlaufen. Ein derartiger Längsschneider ist durch die US-A-4 257 298 bekannt.
Der Längsschneider 20 weist eine elektrostatische Abscheide- oder Sammelvorrichtung für den beim Längsschneiden anfallenden Staub auf. Hierzu befinden sich seitlich der Kreismesser 27 und 28 Abscheideflächen 29 bzw. 31, die ebenso wie die Abscheideflächen 16 und 17 aus Kunststoff bestehen und von als Ionisationsstäbe ausgebildeten Ladungsquellen 32 bzw. 33 mit Ladungen versehen werden können. Die Abscheideflächen können auch aus Metall bestehen und ihre Ladungen von einer Hochspannungsquelle erhalten. Die beim Schneiden anfallenden Staubpartikel werden von den Ladungen zu den Abscheideflächen 29, 30 bewegt, dort angesammelt und von dort auf geeignete Weise entfernt.FIG. 2 shows a so-called slitter 20, known per se, for a paper web 11, the cutting tool of which is designed as a circular knife arrangement 21. The latter contains two circular knives 27 and 28 driven by gears 22, 23 according to the arrows 24 and 26, respectively, which cut the web 11 from paper, cardboard, cardboard or another material which releases dust during the cutting in the direction of its movement 9. One of the circular knives 27, 28 need not be driven, but can run along empty. Such a slitter is known from US-A-4,257,298.
The slitter 20 has an electrostatic separating or collecting device for the dust produced during slitting. For this purpose, there are separating surfaces 29 and 31 on the side of the circular knives 27 and 28, which, like the separating surfaces 16 and 17, are made of plastic and can be provided with charges by charge sources 32 and 33 designed as ionization bars. The deposition surfaces can also consist of metal and receive their charges from a high voltage source. The dust particles produced during cutting are moved by the charges to the separation surfaces 29, 30, collected there and removed from there in a suitable manner.

Gemäß der Erfindung können in einer Schneidanlage Quer- und Längsschneider vorgesehen sein, etwa wie dies aus der US-A-3 916 743 bekannt ist. Auch in einem solchen Fall ist der Einsatz von elektrostatischen Abscheide- oder Sammelvorrichtungen der in den Figuren 1 und 2 beschriebenen Art sowohl beim Quer- als auch beim Längsschneider möglich.According to the invention, transverse and longitudinal cutters can be provided in a cutting system, for example as is known from US Pat. No. 3,916,743. Even in such a case, the use of electrostatic separating or collecting devices of the type described in FIGS. 1 and 2 is possible both with the cross cutter and with the longitudinal cutter.

Claims (11)

Verfahren zum Schneiden von bewegten Bahnen aus Papier oder ähnlichem Material, bei dem mindestens ein Schneidwerkzeug beim Schneiden Staub erzeugt, der aus der Schneidzone entfernt wird, dadurch gekennzeichnet, daß der beim Schneiden anfallende Staub elektrostatisch abgeschieden wird.Method for cutting moving webs of paper or similar material, in which at least one cutting tool generates dust during cutting that is removed from the cutting zone, characterized in that the dust produced during cutting is electrostatically separated. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Schneidwerkzeug die Bahn quer zu ihrer Bewegungsrichtung schneidet.A method according to claim 1, characterized in that the cutting tool cuts the web transverse to its direction of movement. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Schneidwerkzeug die Bahn in Bewegungsrichtung schneidet.A method according to claim 1, characterized in that the cutting tool cuts the web in the direction of movement. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Schneidwerkzeug die Bahn mittels an rotierenden Trägern quer zur Bewegungsrichtung der Bahn befestigter zum Ausführen von quer zur Bewegungsrichtung verlaufenden Schnitten (Querschnitten) zusammenwirkender Messer und/oder zum Ausführen von in Bewegungsrichtung verlaufenden Schnitten (Längsschnitten) mittels mindestens eines rotierenden Kreismessers schneidet.Method according to one or more of the preceding claims, characterized in that the cutting tool the web by means of knives which cooperate on rotating supports and which act transversely to the direction of movement of the web and which make cross-cuts (cross-sections) and / or make cuts which run in the direction of movement (Longitudinal cuts) by means of at least one rotating circular knife. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß beim Schneiden von Bahnen aus verholzte Fasern und gegebenenfalls Asche enthaltendem Umweltpapier entstehender Staub elektrostatisch abgeschieden wird.Method according to one or more of the preceding claims, characterized in that dust produced during the cutting of webs from woody fibers and environmental paper possibly containing ash is electrostatically separated. Vorrichtung zum Schneiden von bewegten Bahnen aus Papier oder ähnlichem beim Schneiden Staub abgebendem Material, mit mindestens einem Schneidwerkzeug und einer Vorrichtung zum Entfernen von Staub aus der Schneidzone , gekennzeichnet durch eine elektrostatische Sammelvorrichtung (16 ... 19; 29 ... 33) im Bereich des Schneidwerkzeugs (7, 8; 27, 26) für den beim Schneiden anfallenden Staub.Device for cutting moving webs of paper or similar material which releases dust when cutting, with at least one cutting tool and a device for removing dust from the cutting zone, characterized by an electrostatic collecting device (16 ... 19; 29 ... 33) in the area of the cutting tool (7, 8; 27, 26) for the dust generated during cutting. Vorrichtung nach Anspruch 6, gekennzeichnet durch mindestens ein die Bahn (11) quer zur Bewegungsrichtung (9) schneidendes Schneidwerkzeug (1).Apparatus according to claim 6, characterized by at least one cutting tool (1) cutting the web (11) transversely to the direction of movement (9). Vorrichtung nach Anspruch 6, gekennzeichnet durch mindestens ein die Bahn (11) in Bewegungsrichtung (9) schneidendes Schneidwerkzeug (20.Apparatus according to claim 6, characterized by at least one cutting tool (20) cutting the web (11) in the direction of movement (9). Vorrichtung nach Anspruch 6 und 7, dadurch gekennzeichnet, daß das die Bahn (11) quer zu ihrer Bewegungsrichtung (9) schneidende Schneidwerkzeug (20) an rotierenden quer zur Bewegungsrichtung angeordneten Messernträgern (4, 6) befestigte zum Ausführen von quer zur Bewegungsrichtung verlaufenden Schnitten (Querschnitten) zusammenwirkende Messer (7, 8) aufweist.Apparatus according to claims 6 and 7, characterized in that the cutting tool (20) cutting the web (11) transversely to its direction of movement (9) is attached to rotating knife carriers (4, 6) arranged transversely to the direction of movement in order to make cuts running transversely to the direction of movement (Cross sections) interacting knives (7, 8). Vorrichtung nach einem oder mehreren der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß das die Bahn (11) in Bewegungsrichtung (9) schneidende Schneidwerkzeug (20) mindestens eine rotierende einen Längsschnitt in Bewegungsrichtung (9) ausführende Kreismesseranordnung (21) aufweist.Device according to one or more of claims 6 to 9, characterized in that the cutting tool (20) cutting the web (11) in the direction of movement (9) has at least one rotating circular knife arrangement (21) which makes a longitudinal cut in the direction of movement (9). Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, gekennzeichnet durch eine Bahn (11) aus verholzte Fasern und gegebenenfalls Asche enthaltendem Umweltpapier.Device according to one or more of the preceding claims, characterized by a web (11) made of woody fibers and optionally containing environmental paper.
EP94109463A 1993-07-01 1994-06-20 Method and apparatus for cutting and electrostatic dedusting of moving webs Withdrawn EP0633073A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4321860 1993-07-01
DE19934321860 DE4321860A1 (en) 1993-07-01 1993-07-01 Method and device for cutting moving webs of paper or similar material

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EP0633073A1 true EP0633073A1 (en) 1995-01-11

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EP94109463A Withdrawn EP0633073A1 (en) 1993-07-01 1994-06-20 Method and apparatus for cutting and electrostatic dedusting of moving webs

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JP (1) JPH07164388A (en)
DE (1) DE4321860A1 (en)
FI (1) FI943145A (en)

Cited By (2)

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EP0963911A1 (en) * 1998-06-09 1999-12-15 Focke &amp; Co. (GmbH &amp; Co.) Packaging machine,in particular for cigarettes
DE102005043676A1 (en) * 2005-09-03 2007-03-22 Man Roland Druckmaschinen Ag Process to cut paper web into single sheets in a sheet-fed rotary press using dynamically-regulated laser beam

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
DE102009055105A1 (en) 2009-12-21 2011-06-22 E.C.H. Will GmbH, 22529 Promotion of multi-ply webs of the paper or cardboard industry
CN111702832B (en) * 2020-06-30 2021-08-06 重庆工程职业技术学院 Automatic processing equipment for battery parts

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JPS53108276A (en) * 1977-03-02 1978-09-20 Nec Corp Laser scribing device
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0963911A1 (en) * 1998-06-09 1999-12-15 Focke &amp; Co. (GmbH &amp; Co.) Packaging machine,in particular for cigarettes
US6357201B1 (en) 1998-06-09 2002-03-19 Focke & Co. (Gmbh & Co.) Packaging machine, in particular for cigarettes
DE102005043676A1 (en) * 2005-09-03 2007-03-22 Man Roland Druckmaschinen Ag Process to cut paper web into single sheets in a sheet-fed rotary press using dynamically-regulated laser beam

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JPH07164388A (en) 1995-06-27
DE4321860A1 (en) 1995-01-12
FI943145A (en) 1995-01-02
FI943145A0 (en) 1994-06-30

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