EP2953874B1 - Paper processing device - Google Patents
Paper processing device Download PDFInfo
- Publication number
- EP2953874B1 EP2953874B1 EP14710493.9A EP14710493A EP2953874B1 EP 2953874 B1 EP2953874 B1 EP 2953874B1 EP 14710493 A EP14710493 A EP 14710493A EP 2953874 B1 EP2953874 B1 EP 2953874B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- processing device
- section
- conveyor belt
- paper processing
- cleaning roller
- 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.)
- Active
Links
- 238000004140 cleaning Methods 0.000 claims description 51
- 239000002184 metal Substances 0.000 claims description 23
- 239000004744 fabric Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000003698 laser cutting Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002103 nanocoating Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F2/00—Transferring continuous webs from wet ends to press sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
- B65H5/222—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices
- B65H5/224—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/53—Auxiliary process performed during handling process for acting on performance of handling machine
- B65H2301/531—Cleaning parts of handling machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/11—Details of cross-section or profile
- B65H2404/115—Details of cross-section or profile other
- B65H2404/1151—Details of cross-section or profile other brush
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/20—Belts
- B65H2404/27—Belts material used
- B65H2404/271—Belts material used felt or wire mesh
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/20—Belts
- B65H2404/28—Other properties of belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/50—Surface of the elements in contact with the forwarded or guided material
- B65H2404/56—Flexible surface
- B65H2404/561—Bristles, brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2406/00—Means using fluid
- B65H2406/20—Means using fluid made only for liquid medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2406/00—Means using fluid
- B65H2406/30—Suction means
- B65H2406/32—Suction belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2601/00—Problem to be solved or advantage achieved
- B65H2601/20—Avoiding or preventing undesirable effects
- B65H2601/26—Damages to handling machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2601/00—Problem to be solved or advantage achieved
- B65H2601/50—Diminishing, minimizing or reducing
- B65H2601/52—Diminishing, minimizing or reducing entities relating to handling machine
- B65H2601/521—Noise
Definitions
- the invention relates to a paper processing device according to claim 1.
- suction belts are usually made of rubber or a similar material and have a large number of holes.
- the transport device has at least two rollers over which this suction belt runs and below the upper section of the suction belt serving as a transport belt (i.e. below the transport section of the transport belt) there is a so-called suction box that can be subjected to negative pressure and whose top side has a large number of openings so that the negative pressure acting in the suction box sucks the transport section onto the suction box and also sucks paper that is on the surface of the transport section onto this surface.
- the WO 2012/120606 A1 describes a suction belt in the form of a fabric with different areas.
- Various materials are suggested for the production of this fabric, for example natural fibers, synthetic fibers or metal threads.
- the US 6 095 218 A discloses a paper processing device according to the preamble of claim 1.
- this metal sheet Before it is welded to form an endless belt, this metal sheet is provided with a very large number of small holes using lasers, so that this metal strip can be guided over a suction box in the conventional way.
- the disadvantage of such a metal strip is the very high costs both in its production and in its assembly.
- the present invention therefore sets itself the task of developing such a paper processing device in such a way that it is significantly simpler to manufacture and preferably also to assemble.
- the conveyor belt is also made of a metal, but not of a perforated metal sheet, but of a metal mesh.
- metal meshes are produced in large quantities and very inexpensively for a wide variety of purposes. It has been found that such a metal mesh serves the same purpose as the laser-perforated metal belt mentioned above over a wide range of mesh sizes and wire thicknesses. It has also been found that such metal meshes can be perforated by means of plasma or laser welding, and that their mechanical properties (in particular their tensile elongation) make them ideal for use as endless conveyor belts. Another advantage over the previous laser-perforated metal belts is that they are often even easier to clean. This is important for the application area described above for laser cutting devices, since laser cutting leaves burnt-off residues (ash and the like) from the paper on the conveyor belt and should be removed as continuously as possible during continuous operation.
- metal mesh scatters the laser light rather than reflecting it, which greatly reduces the negative effects of reflections.
- the unwanted reflections can be further reduced by sandblasting and/or nano-coating the metal mesh.
- a vacuum generator is provided below the upper section of the conveyor belt, which has several axial fans arranged between the transport section and the return section.
- the Figure 1 shows a schematic cross-sectional view of a device for producing laser cuts in flat paper blanks such as greeting cards or the like.
- This device consists of four elements, namely a feed unit 40, a transport device 10, a laser 30 arranged above the transport device and a removal unit 50.
- the transport direction of the paper is the direction T and the device can work continuously, ie the cutting contours are produced by the laser with a constant transport movement by the transport device 10.
- the feed unit 40 can be constructed conventionally, namely consisting of a table 42 with a smooth surface and a series of transport rollers 44, which feed the paper blanks to the transport device 10 by sliding over the table.
- the transport rollers 44 can be rotated slightly out of a 90-degree angle with respect to the transport direction T ( Figure 1a) and press the paper blanks against a stop so that a more precise positioning of the paper blanks is achieved.
- the discharge unit 50 can also be constructed conventionally and can consist, for example, of a connecting piece 52 and a conveyor belt 54. However, it would be equally possible, for example, to provide a stacker or the like immediately after the transport device 10.
- the essential elements of the transport device 10 are two rollers 12a, 12b, whereby at least one of the two rollers, here the rear roller 12b, is driven, the conveyor belt 25 and a plurality of axial fans 16, which are arranged below the upper section (i.e. the transport section) 25a of the conveyor belt 25.
- This carrier 14 has a plurality of openings; the axial fans 16 are arranged at the positions of the openings, as shown in Figure 1 is only shown very schematically. In practice, the carrier 14 can also be made much thinner (this will be discussed below with reference to the Figures 4 to 9
- the axial fans 16 are preferably located relatively close to the underside of the upper section 25a of the conveyor belt.
- the conveyor belt 25 is made of metal fabric, i.e. usually made of a fabric consisting of warp wires 27 and weft wires 26. This is shown in the Figures 2 and 3 shown schematically.
- the wire thickness of the interwoven wires is preferably between 0.25 and 0.4 mm and the mesh size is preferably between 0.4 and 0.6 mm.
- the metal mesh is preferably made of stainless steel, for example V2A.
- a so-called "normal wire mesh” is used, that is, a wire mesh in a smooth weave, a wire mesh in a linen weave or a wire mesh in a twill weave. If the metal mesh in a twill weave is used, the warp wires 27 preferably extend in the transport direction.
- a piece of metal mesh of the appropriate length and width is cut to size and the two end edges (usually the short edges) are welded together, preferably by plasma or laser welding, so that an endless conveyor belt is created.
- the transport device 10 can also have, for example, the following elements shown: input rollers 23, an output roller 20 and a lower cleaning brush 22 or a cleaning station. A preferred embodiment of such a cleaning station will be described later with reference to the Figures 11 and 12 explained.
- the output roller 20 can also perform a cleaning function.
- the provision of at least one cleaning roller or cleaning brush is preferable in the preferred use of the transport device described in the exemplary embodiment, since burnt residues must generally be removed from the transport device 10. If an output roller 20 is provided as shown at the end of the upper section 25a of the conveyor belt 25 (i.e. the transport section), this must be driven in the opposite direction to the rollers 12a, b; a cleaning brush 22 or cleaning roller acting on the lower, i.e.
- the returning section of the conveyor belt can also be driven in the same direction as the rollers 12a, b, i.e. in the opposite direction to the returning lower section 25b, which can lead to an improvement in the cleaning effect.
- the output roller 20 also acts on the processed paper blanks, it must be made of a relatively soft material, while the lower cleaning brush 22 can also be made of a relatively hard material.
- the lower cleaning brush 22 could of course also act on the conveyor belt 25 in the area of one of the two rollers (but already on the lower half in each case).
- Cleaning the lower section 25b with a "chainsaw-like" cleaning device has also proven to be very advantageous.
- cleaning brushes rotate between two rollers in the manner of a chainsaw.
- the cleaning brushes run in a straight line.
- the cutting laser 30 is arranged above the transport device 10.
- the device is operated continuously and preferably at a constant transport speed.
- the paper blanks fed in by the feed unit 40 in a precise position are held in position by the axial fans 16, which suck air through the upper section 25a of the conveyor belt 25.
- the air expelled by the axial fans 16 exits through the lower section 25b of the conveyor belt and thus contributes further to cleaning the returning section of the conveyor belt 25.
- the provision of axial fans has the further major advantages of significantly reduced energy requirements and significantly reduced noise generation compared to the provision of a suction box (in conventional suction boxes, radial compressors are generally used to generate negative pressure).
- the laser 30 cuts the paper blanks lying on the upper section of the conveyor belt, which leave the transport device 10 at the rear roller 12b and are discharged via the discharge unit 50.
- FIGS 4 to 9 show the transport device 10 just described again in greater detail, whereby in the Figures 4 to 7 the conveyor belt 25 is not shown. All elements are in accordance with the Figure 1 with reference symbols so that repetitions are avoided as far as possible. Figures 4 and 9 very good that the horizontal Carrier 14 can be designed quite thin and that the drive motors of the axial fans 16 can be located outside the plane defined by the carrier 14. The diameters of the openings in the carrier 16 correspond essentially to the diameter of the blades of the axial fans used.
- the carrier 14 extends between two side cheeks 18a, 18b, so that the two sections of the conveyor belt 25, the rollers 12a, 12b and the side cheeks 18a, 18b enclose an interior space in which the aforementioned carrier 14 is arranged.
- each side cheek has a slot 19 extending in the transport direction, through which the axis of a roller, here the front roller 12a, extends, so that the distance between the two rollers 12a, 12b can be changed and thus the conveyor belt 25 can be tensioned.
- the conveyor belt 25 can therefore also be mounted in the finished state, i.e. welded to form an endless loop, in which case it is pushed laterally onto the rollers 12a, 12b; in this case, auxiliary units such as the input rollers 23 etc. may have to be removed.
- the Figures 11 and 12 show a preferred embodiment of a cleaning station 70, which can be arranged below the returning section 25 of the conveyor belt 25, for example at the location of the above-mentioned cleaning brush 22.
- This cleaning station 70 has a cleaning roller 71 that can be driven about an axis 73 and a container 76 that is open at the top for receiving cleaning liquid 77 (in the simplest case, water).
- a stripping roller 78 is also provided, which is driven in the opposite direction to the cleaning roller.
- At least the outer jacket layer of the cleaning roller 71 is a sponge (sponge coat 74 - Figure 11 ) or in the form of a brush (brush cover 75 - Figure 12 ).
- the cleaning roller 71 is preferably driven in the same direction of rotation as the rollers 12a, 12b.
- the cleaning roller 71 is positioned so that it presses against the returning section 25b of the conveyor belt 25 from below and dips into the cleaning liquid 77 with a lower part. As the cleaning roller rotates, new cleaning liquid 77 is constantly taken up and conveyed to the returning section 25b of the conveyor belt.
- the degree of moistening of the returning section can be adjusted by the stripping roller, which is arranged in the direction of rotation of the cleaning roller between the cleaning liquid and the conveyor belt.
- the radial distance between the cleaning roller and the stripping roller 78 is preferably adjustable.
- the conveyor belt can be thoroughly cleaned of burnt residue, ash and the like.
- the moistening of the conveyor belt itself also has advantages: Firstly, evaporative cooling is created - additionally promoted by the arrangement of the axial fans - i.e. the conveyor belt, whose upper section 25a is exposed to laser energy, is cooled. Furthermore, the moistening can be adjusted so that a certain amount of liquid adheres to the conveyor belt even on its upper section 25a. This adhering liquid improves the adhesion of burnt residue, ash and the like so that they do not soil the back of the paper being processed.
- the fabric structure of the metal conveyor belt strongly promotes the desired adhesion of liquid.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Description
Die Erfindung betrifft eine Papierbearbeitungseinrichtung nach Anspruch 1.The invention relates to a paper processing device according to claim 1.
Wenn Elemente aus Papier positionsgenau bewegt werden müssen, so ist es in der Technik bekannt, hierfür sogenannte Saugbänder einzusetzen. Solche Saugbänder bestehen in der Regel aus Gummi oder einem ähnlichen Material und weisen eine Vielzahl von Löchern auf. Die Transporteinrichtung weist wenigstens zwei Walzen auf, über welche dieses Saugband läuft und unterhalb des oberen Abschnittes des als Transportband dienenden Saugbandes (also unterhalb des Transportabschnittes des Transportbandes) ist ein mit Unterdruck beaufschlagbarer sogenannter Saugkasten vorgesehen, dessen Oberseite eine Vielzahl von Öffnungen aufweist, so dass im Saugkasten wirkender Unterdruck zum einen den Transportabschnitt auf den Saugkasten ansaugt, und zum anderen Papier, welches sich auf der Oberfläche des Transportabschnittes befindet, auf diese Oberfläche ansaugt.If elements made of paper have to be moved in a precise position, it is known in technology to use so-called suction belts for this purpose. Such suction belts are usually made of rubber or a similar material and have a large number of holes. The transport device has at least two rollers over which this suction belt runs and below the upper section of the suction belt serving as a transport belt (i.e. below the transport section of the transport belt) there is a so-called suction box that can be subjected to negative pressure and whose top side has a large number of openings so that the negative pressure acting in the suction box sucks the transport section onto the suction box and also sucks paper that is on the surface of the transport section onto this surface.
Die
Aus der
Die
In der Technik sind weiterhin Laserschnittanlagen bekannt geworden, mit deren Hilfe man sehr präzise Konturen aus Papier ausschneiden kann, um somit beispielsweise Buchstaben, Zahlen oder andere Zeichen in Form von Durchbrechungen zu erzeugen. Auch hier ist es natürlich notwendig, das Papier präzise hinsichtlich des Lasers zu positionieren bzw. zu transportieren, so dass auch hier der Einsatz entsprechender Saugbänder sinnvoll ist. Auf Grund der hohen thermischen Belastung durch den Laser ist jedoch der Einsatz konventioneller Saugbänder, insbesondere aus einem Gummi oder einem gummiähnlichen Material, nicht möglich, bzw. würde zu einem extrem hohen Verschleiß führen. Es ist deshalb bekannt, bei derartigen Laserschnitteinrichtungen ein dünnes Metallblech als Transportband einzusetzen. Dieses Metallblech wird, bevor es zu einem Endlosband geschweißt wird, mittels Lasern mit einer sehr großen Menge kleiner Löcher versehen, so dass dieses Metallband in konventioneller Art und Weise über einen Saugkasten geführt werden kann. Nachteilig bei einem solchen Metallband sind die sehr hohen Kosten sowohl bei seiner Herstellung als auch bei seiner Montage.Laser cutting systems have also become known in technology, with the help of which very precise contours can be cut out of paper in order to create, for example, letters, numbers or other characters in the form of perforations. Here too, it is of course necessary to position or transport the paper precisely in relation to the laser, so that the use of appropriate suction belts is also sensible here. Due to the high thermal load from the laser, however, the use of conventional suction belts, particularly those made of rubber or a rubber-like material, is not possible or would lead to extremely high levels of wear. It is therefore known to use a thin metal sheet as a conveyor belt in such laser cutting devices. Before it is welded to form an endless belt, this metal sheet is provided with a very large number of small holes using lasers, so that this metal strip can be guided over a suction box in the conventional way. The disadvantage of such a metal strip is the very high costs both in its production and in its assembly.
Hiervon ausgehend stellt sich die vorliegende Erfindung deshalb die Aufgabe, eine solche Papierbearbeitungseinrichtung derart weiterzubilden, dass sie deutlich einfacher in der Herstellung und vorzugsweise auch in der Montage ist.Based on this, the present invention therefore sets itself the task of developing such a paper processing device in such a way that it is significantly simpler to manufacture and preferably also to assemble.
Diese Aufgabe wird durch eine Papierbearbeitungseinrichtung mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a paper processing device having the features of claim 1.
Erfindungsgemäß besteht das Transportband ebenfalls aus einem Metall, jedoch nicht aus einem gelochten Metallblech, sondern aus einem Metallgewebe. Derartige Metallgewebe werden zu unterschiedlichsten Zwecken in großen Mengen und sehr preisgünstig hergestellt. Es hat sich herausgestellt, dass ein solches Metallgewebe über einen weiten Bereich von Maschenweiten und Drahtstärken hin denselben Zweck erfüllt, wie das oben erwähnte lasergelochte Metallband. Es hat sich weiterhin herausgestellt, dass derartige Metallgewebe mittels Plasma oder Laserschweißens leicht zu Endlosbändern geschweißt werden können, und dass sie von ihren mechanischen Eigenschaften her (insbesondere von ihrer Zugdehnung) hervorragend zum Einsatz als Endlosförderbänder geeignet sind. Ein weiterer Vorteil gegenüber den bisherigen lasergelochten Metallbändern ist, dass sie sich häufig sogar leichter reinigen lassen. Dies ist bei dem oben beschriebenen Einsatzgebiet bei Laserschnittvorrichtungen wichtig, da durch das Laserschneiden Abbrandreste (Asche und dergleichen) vom Papier auf dem Transportband zurückbleiben und im Dauerbetrieb möglichst kontinuierlich entfernt werden sollten.According to the invention, the conveyor belt is also made of a metal, but not of a perforated metal sheet, but of a metal mesh. Such metal meshes are produced in large quantities and very inexpensively for a wide variety of purposes. It has been found that such a metal mesh serves the same purpose as the laser-perforated metal belt mentioned above over a wide range of mesh sizes and wire thicknesses. It has also been found that such metal meshes can be perforated by means of plasma or laser welding, and that their mechanical properties (in particular their tensile elongation) make them ideal for use as endless conveyor belts. Another advantage over the previous laser-perforated metal belts is that they are often even easier to clean. This is important for the application area described above for laser cutting devices, since laser cutting leaves burnt-off residues (ash and the like) from the paper on the conveyor belt and should be removed as continuously as possible during continuous operation.
Ein weiterer Vorteil ist, dass das Metallgewebe das Laserlicht eher streut als reflektiert, was die negativen Einflüsse der Reflexionen stark mindert. Die unerwünschten Reflexionen können durch Sandstrahlen und/oder Nanobeschichten des Metallgewebes noch weiter vermindert werden.Another advantage is that the metal mesh scatters the laser light rather than reflecting it, which greatly reduces the negative effects of reflections. The unwanted reflections can be further reduced by sandblasting and/or nano-coating the metal mesh.
Weiterhin ist ein unterhalb des oberen Abschnitts des Transportbandes angeordneter Unterdruckerzeuger vorgesehen, welcher mehrere zwischen Transportabschnitt und rücklaufendem Abschnitt angeordnete Axiallüfter aufweist.Furthermore, a vacuum generator is provided below the upper section of the conveyor belt, which has several axial fans arranged between the transport section and the return section.
Weitere Vorteile und bevorzugte Ausführungsformen der Erfindung ergeben sich aus den Unteransprüchen sowie aus dem nun mit Bezug auf die Figuren näher dargestellten Ausführungsbeispiel.Further advantages and preferred embodiments of the invention emerge from the subclaims and from the embodiment now presented in more detail with reference to the figures.
Es zeigen:
- Figur 1
- einen stark schematisierten Querschnitt durch eine Laserschnittanlage, in welcher eine erfindungsgemäße Transportvorrichtung eingesetzt ist,
Figur 2- das Detail D aus
Figur 1 in einer ebenfalls sehr schematisierten und nicht maßstabsgetreuen Schnittdarstellung, - Figur 3
- eine Draufsicht aus Richtung D1 auf das in
Gezeigte,Figur 2 - Figur 4
- die Transportvorrichtung aus
Figur 1 in einer etwas detaillierteren Darstellung, wobei jedoch das Transportband nicht dargestellt ist, - Figur 5
- eine Draufsicht aus Richtung D2 in
Figur 4 , - Figur 6
- eine Draufsicht aus Richtung D3 in
Figur 5 , - Figur 7
- das in den
Figuren 4 bis 6 Gezeigte in einer perspektivischen Ansicht, - Figur 8
- das in
Figur 7 Gezeigte mit montiertem Transportband, - Figur 9
- das in
Figur 8 Gezeigte in einer aufgeschnittenen Darstellung, Figur 10- eine Variation zu dem in
Figur 1 Gezeigten, - Figur 11
- eine bevorzugte Ausgestaltung einer Reinigungsstation und
- Figur 12
- eine Variation zu dem in
Figur 11 Gezeigten.
- Figure 1
- a highly schematic cross-section through a laser cutting system in which a transport device according to the invention is used,
- Figure 2
- the detail D from
Figure 1 in a very schematic and not to scale sectional view, - Figure 3
- a plan view from direction D1 of the
Figure 2 Shown, - Figure 4
- the transport device
Figure 1 in a somewhat more detailed representation, although the conveyor belt is not shown, - Figure 5
- a plan view from direction D2 in
Figure 4 , - Figure 6
- a plan view from direction D3 in
Figure 5 , - Figure 7
- that in the
Figures 4 to 6 Shown in a perspective view, - Figure 8
- this in
Figure 7 Shown with mounted conveyor belt, - Figure 9
- this in
Figure 8 Shown in a cutaway view, - Figure 10
- a variation on the
Figure 1 Shown, - Figure 11
- a preferred embodiment of a cleaning station and
- Figure 12
- a variation on the
Figure 11 Shown.
Die
Die Zuführeinheit 40 kann konventionell aufgebaut sein, nämlich bestehend aus einem Tisch 42 mit glatter Oberfläche und einer Reihe von Transportrollen 44, welche die Papierzuschnitte über dem Tisch gleitend der Transportvorrichtung 10 zuführen. Die Transportrollen 44 können gegenüber der Transportrichtung T leicht aus einem 90-Grad-Winkel herausgedreht sein (Figur 1a) und die Papierzuschnitte so an einen Anschlag drücken, so dass eine genauere Positionierung der Papierzuschnitte erreicht wird. Die Abfuhreinheit 50 kann ebenfalls konventionell aufgebaut sein und kann beispielsweise aus einem Anschlussstück 52 und einem Förderband 54 bestehen. Es wäre jedoch beispielsweise genauso möglich, unmittelbar nach der Transportvorrichtung 10 einen Stapler oder dergleichen vorzusehen.The
Die wesentlichen Elemente der erfindungsgemäßen Transportvorrichtung 10 sind zwei Walzen 12a,12 b, wobei wenigstens eine der beiden Walzen, hier die hintere Walze 12b, angetrieben ist, das Transportband 25 und eine Mehrzahl von Axiallüftern 16, welche unterhalb des oberen Abschnittes (also des Transportabschnitts) 25a des Transportbandes 25 angeordnet sind. Zur Positionierung dieser Axiallüfter 16 (diese Axiallüfter 16 können grundsätzlich aufgebaut sein wie konventionelle Lüfter für Computergehäuse) dient ein in der Horizontalebene liegender Träger 14, welcher sich im Wesentlichen von der vorderen Walze 12a zur hinteren Walze 12b erstreckt. Dieser Träger 14 weist eine Vielzahl von Durchbrechungen auf; an den Positionen der Durchbrechungen sind die Axiallüfter 16 angeordnet, wie dies in
Das Transportband 25 ist erfindungsgemäß als Metallgewebe, also in der Regel aus einem aus Kettdrähten 27 und Schussdrähte 26 bestehenden Gewebe, gefertigt. Dies ist in den
Optional kann die Transportvorrichtung 10 noch beispielsweise folgende dargestellte Elemente aufweisen: Eingangsrollen 23, eine Ausgangsrolle 20 und eine untere Reinigungsbürste 22 oder eine Reinigungsstation. Eine bevorzugte Ausführungsform einer solchen Reinigungsstation wird später mit Bezug auf die
Eine Reinigung des unteren Abschnitts 25b mit einer "kettensägenartigen" Reinigungsvorrichtung, deren Bewegungsrichtung senkrecht zur Transportvorrichtung ist, hat sich ebenfalls als sehr vorteilhaft herausgestellt. Bei einer solchen Reinigungsvorrichtung laufen Reinigungsbürsten nach Art einer Kettensäge zwischen zwei Rollen um. Im wirksamen Abschnitt verlaufen die Reinigungsbürsten auf einer Geraden.Cleaning the
In den meisten Anwendungsfällen ist eine leicht feuchte Reinigung zu bevorzugen.In most applications, slightly damp cleaning is preferable.
Oberhalb der Transportvorrichtung 10 ist der Schnittlaser 30 angeordnet.The cutting
Der Betrieb der Vorrichtung erfolgt, wie dies bereits erwähnt wurde, kontinuierlich und bei vorzugsweise konstanter Transportgeschwindigkeit. Durch die Axiallüfter 16, welche Luft durch den oberen Abschnitt 25a des Transportbandes 25 saugen, werden die von der Zuführeinheit 40 positionsgenau zugeführten Papierzuschnitte in Position gehalten. Die von den Axiallüftern 16 ausgestoßene Luft tritt durch den unteren Abschnitt 25b des Transportbandes wieder aus und trägt somit weiterhin zu einer Reinigung des rücklaufenden Abschnittes des Transportbandes 25 bei. Das Vorsehen von Axiallüftern hat gegenüber dem Vorsehen eines Saugkastens noch die weiteren großen Vorteile eines deutlich verringerten Energiebedarfes und einer deutlich verringerten Geräuschentwicklung (bei herkömmlichen Saugkästen werden in der Regel Radialverdichter als Unterdruckerzeuger eingesetzt).As already mentioned, the device is operated continuously and preferably at a constant transport speed. The paper blanks fed in by the
Der Laser 30 schneidet die auf dem oberen Abschnitt des Transportbandes liegenden Papierzuschnitte, welche die Transportvorrichtung 10 an der hinteren Walze 12b verlassen und über die Abfuhreinheit 50 abgeführt werden.The
Die
Um das Transportband 25 spannen zu können, weist zumindest ein Ende jeder Seitenwange einen sich in Transportrichtung erstreckenden Schlitz 19 auf, durch welchen sich die Achse einer Walze, hier der vorderen Walze 12a, erstreckt, so dass der Abstand der beiden Walzen 12a, 12b veränderbar ist und somit das Transportband 25 gespannt werden kann. Somit kann das Transportband 25 auch im fertigen, also zu einer Endlosschlaufe geschweißten Zustand, montiert werden, wobei es seitlich auf die Walzen 12a, 12b aufgeschoben wird, hierbei müssen gegebenenfalls Nebenaggregate wie die Eingangsrollen 23 usw. abmontiert sein.In order to be able to tension the
Um in einem zentralen Abschnitt des oberen Abschnittes 25a des Transportbandes 25 eine noch weiter verbesserte Planlage des transportierten Papiers zu erreichen, ist es möglich, zwei sich quer zur Transportrichtung erstreckende Querstreben 60a, 60b vorzusehen, deren oberste Punkte oberhalb der obersten Punkte der Walzen 12a, 12b liegen, so dass ein leicht erhöhter Mittelabschnitt ausgebildet wird, welcher extrem eben ist. Dies ist schematisch in
Die
Die Reinigungswalze 71 ist so positioniert, dass sie von unten gegen den rücklaufenden Abschnitt 25b des Transportbandes 25 drückt und mit einem unteren Teil in die Reinigungsflüssigkeit 77 eintaucht. Durch die Drehung der Reinigungswalze wird ständig neue Reinigungsflüssigkeit 77 aufgenommen und zum rücklaufenden Abschnitt 25b des Transporbandes gefördert. Durch die Abstreifrolle, welche in Drehrichtung der Reinigungswalze zwischen der Reinigungsflüssigkeit und dem Transportband angeordnet ist, lässt sich das Maß der Befeuchtung des rücklaufenden Abschnitts einstellen. Hierzu ist der radiale Abstand zwischen Reinigungswalze und Abstreifwalze 78 vorzugsweise einstellbar.The cleaning
Die feuchte Reinigung (insbesondere mithilfe der eben beschriebenen Reinigungsstation) hat mehre Vorteile. Zunächst lässt sich eine gute Reinigung des Transporbandes von Abbrand, Asche und dergleichen erzielen. Weiterhin hat auch die Befeuchtung des Transportbandes als solche Vorteile: Zum einen entsteht - zusätzlich begünstigt durch die Anordnung der Axiallüfter - Verdunstungskälte, das heißt, das Transportband, dessen oberer Abschnitt 25a mit Laserenergie beaufschlagt wird, wird gekühlt. Weiterhin kann die Befeuchtung so eingestellt werden, dass dem Transportband auch noch an seinem oberen Abschnitt 25a eine gewisse Menge an Flüssigkeit anhaftet. Diese anhaftende Flüssigkeit verbessert die Adhäsion von Abbrand, Asche und dergleichen, so dass diese die Rückseite des bearbeiteten Papiers nicht verschmutzen. Die Gewebestruktur des metallenen Transportbandes begünstigt stark das gewollte Anhaften von Flüssigkeit. Wet cleaning (particularly with the help of the cleaning station just described) has several advantages. Firstly, the conveyor belt can be thoroughly cleaned of burnt residue, ash and the like. Furthermore, the moistening of the conveyor belt itself also has advantages: Firstly, evaporative cooling is created - additionally promoted by the arrangement of the axial fans - i.e. the conveyor belt, whose
Claims (12)
- Paper processing device comprising:a transport device (10) for paper withan air-permeable conveyor belt (25) consisting of metal fabric and being guided over at least two rollers (12a, 12b), the upper section of the conveyor belt (25) forming the transport section (25a) and the lower section of the conveyor belt (25) forming the return section (25b), anda vacuum generator arranged below the transport section (25a), anda laser (30) arranged above the transport section (25a) for cutting paper, characterised in that the vacuum generator comprises a plurality of axial fans (16) arranged between the transport section (25a) and the return section (25b).
- Paper processing device according to claim 1, characterised in that the conveyor belt (25) is made of a metal fabric strip, the end faces of which are plasma or laser welded together.
- Paper processing device according to claim 1 or claim 2, characterised in that the axial fans (16) act directly on the transport section (25a) and the return section (25b).
- Paper processing device according to one of the preceding claims, characterised in that the metal fabric of the conveyor belt is a fabric in a body weave, a fabric in a linen weave or a fabric in a plain weave.
- Paper processing device according to one of the preceding claims, characterised in that at least one cleaning device is provided which acts on the return section (25b).
- Paper processing device according to claim 5, characterised in that the cleaning device moistens the conveyor belt (25).
- Paper processing device according to claim 6, characterised in that the cleaning device is designed as a cleaning station (70) with a drivable cleaning roller (71) and an open-top container (76) which can be filled with liquid, the cleaning roller (71) being positioned in such a way that an upper section of its surface touches the return section (25b) of the conveyor belt (25) and that a lower part of the cleaning roller is located inside the container (76).
- Paper processing device according to claim 7, characterised in that the axis (73) of the cleaning roller (71) extends parallel to the axes of the rollers (12a, 12b), the cleaning roller (71) preferably being driven in the same direction of rotation as the rollers (12a, 12b).
- Paper processing device according to one of claims 7 or 8, characterised in that additionally a stripping roller (78) is provided which extends parallel to the cleaning roller (71) and that can preferably be driven in the opposite direction to the cleaning roller and which contacts a section of the surface of the cleaning roller (71).
- Paper processing device according to one of claims 7 to 9, characterised in that at least the outer jacket section of the cleaning roller (71) is formed by a sponge.
- Paper processing device according to one of claims 7 to 10, characterised in that at least the outer jacket section of the cleaning roller (71) is formed by a brush, the bristles of which extend substantially radially to the axis (73) of the cleaning roller (71).
- Paper processing device according to one of the preceding claims, characterised in that the conveyor belt (25) is sandblasted and/or nano-coated.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013002122.7A DE102013002122A1 (en) | 2013-02-08 | 2013-02-08 | Transport device for paper and paper processing device |
PCT/EP2014/000334 WO2014121939A1 (en) | 2013-02-08 | 2014-02-07 | Transport device for paper, and paper processing device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2953874A1 EP2953874A1 (en) | 2015-12-16 |
EP2953874C0 EP2953874C0 (en) | 2024-04-10 |
EP2953874B1 true EP2953874B1 (en) | 2024-04-10 |
Family
ID=50288020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14710493.9A Active EP2953874B1 (en) | 2013-02-08 | 2014-02-07 | Paper processing device |
Country Status (4)
Country | Link |
---|---|
US (1) | US9725851B2 (en) |
EP (1) | EP2953874B1 (en) |
DE (1) | DE102013002122A1 (en) |
WO (1) | WO2014121939A1 (en) |
Families Citing this family (12)
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DE102013002122A1 (en) * | 2013-02-08 | 2014-08-14 | Jörg Scheffler | Transport device for paper and paper processing device |
US9688474B2 (en) * | 2014-01-24 | 2017-06-27 | Lasx Industries, Inc. | Metal belt for laser materials processing |
DE102016103811A1 (en) | 2016-03-03 | 2017-09-07 | Jörg Scheffler | Printing sheet, method for producing such a sheet, means for carrying out this method, method for processing such a sheet, means for carrying out this method and method for producing a printed product |
CN107351356B (en) * | 2017-09-08 | 2023-12-19 | 佛山市南海广一塑薄膜有限公司 | Thermoplastic film traction device |
CN107351368B (en) * | 2017-09-08 | 2023-08-01 | 江苏求实塑业有限公司 | Thermoplastic film tractor |
DE102018113943A1 (en) | 2018-06-12 | 2019-12-12 | Jörg Scheffler | Device for separating sheets |
DE102018119971B4 (en) | 2018-08-16 | 2022-03-24 | Jörg Scheffler | Device for processing flat elements |
ES2750073B2 (en) * | 2018-09-24 | 2021-05-11 | Asitec Ceram S L | SUPPORT BASE FOR CONVEYOR BELTS IN CONTINUOUS DIGITAL PRINTING MACHINES |
CN113401696B (en) * | 2021-07-15 | 2022-11-22 | 深圳市美达思科技有限公司 | Thermoplastic plastic film production equipment |
TWI804979B (en) * | 2021-09-10 | 2023-06-11 | 虹光精密工業股份有限公司 | Cleaning member, paper transmitting device and office machine using the same |
CN113955383B (en) * | 2021-09-15 | 2023-08-29 | 山东华明纺织有限公司 | Anti-drifting material receiving device for fluff product production |
CN114654781B (en) * | 2022-01-04 | 2024-08-23 | 昆山恺博传动系统有限公司 | Conductive synchronous conveyor belt and preparation method thereof |
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2014
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- 2014-02-07 US US14/766,055 patent/US9725851B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
US20160032526A1 (en) | 2016-02-04 |
US9725851B2 (en) | 2017-08-08 |
EP2953874A1 (en) | 2015-12-16 |
EP2953874C0 (en) | 2024-04-10 |
DE102013002122A1 (en) | 2014-08-14 |
WO2014121939A1 (en) | 2014-08-14 |
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