EP0275909B1 - Slitting machine for longitudinally slitting webs of films - Google Patents
Slitting machine for longitudinally slitting webs of films Download PDFInfo
- Publication number
- EP0275909B1 EP0275909B1 EP88100371A EP88100371A EP0275909B1 EP 0275909 B1 EP0275909 B1 EP 0275909B1 EP 88100371 A EP88100371 A EP 88100371A EP 88100371 A EP88100371 A EP 88100371A EP 0275909 B1 EP0275909 B1 EP 0275909B1
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- EP
- European Patent Office
- Prior art keywords
- cutting
- knives
- knife
- slot
- blades
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- 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
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2614—Means for mounting the cutting member
- B26D7/2621—Means for mounting the cutting member for circular cutters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
- B26D1/24—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with another disc cutter
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- 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
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2628—Means for adjusting the position of the cutting member
- B26D7/2635—Means for adjusting the position of the cutting member for circular cutters
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- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S83/00—Cutting
- Y10S83/955—Cutter edge shiftable to present different portion of edge
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- 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
- Y10T83/05—With reorientation of tool between cuts
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- 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
- Y10T83/0524—Plural cutting steps
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- 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
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7809—Tool pair comprises rotatable tools
- Y10T83/783—Tool pair comprises contacting overlapped discs
- Y10T83/7834—With means to effect axial pressure on pair
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- 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
- Y10T83/929—Tool or tool with support
- Y10T83/9372—Rotatable type
- Y10T83/9403—Disc type
Definitions
- the invention relates to a cutting method according to the preamble of claim 1 (see DE-A-2405849).
- Foil webs in particular coated webs for photographic and magnetizable materials, are cut lengthwise into a group of narrow bands during further processing.
- the circular knife cut is the most common of the longitudinal cutting methods.
- Circular upper and lower knives arranged on corresponding knife shafts interact.
- An embodiment has become known in which the circular upper knife (disc knife) is immersed in the shoulder of a circular lower knife (slot knife).
- the cutting edges are very heavily ground off, with the disc knife digging into the groove knife in advanced use. If the edge wear increases, for example in the order of the film thickness, the knives begin to cut squeezing, which results in poor cutting quality.
- An improved cutting device which provides a significantly longer service life for the knives, is known from DE-A-24 05 849.
- a disc knife (1) which is pressed against the cutting shoulder (2) of a slot knife (3) by a plate spring (4), plunges somewhat deeper than the thickness of the cutting shoulder.
- a disadvantage of this device is that the progressive removal of the cutting shoulder of the slot knife while regrinding the slot knife means that the contact surface of the film web to be cut becomes smaller and smaller, since the gap width (b) becomes larger and larger, as a result of which the cutting quality suffers.
- the contact pressure of the disc springs must be continuously adjusted due to the wear of the cutting shoulders during operation.
- the task was to find a cutting process that does not have the above disadvantages and that, in particular, provides a long service life for the disc and slot knives before regrinding the knives is necessary.
- a multiple cutting tool is shown schematically as it is used for the production of narrow strips from a wide film web.
- the disc knives (1) and the grooving knives (3) are arranged on the knife shafts (6) and (7) at equal intervals.
- the disk knives (1) immerse with their circumference in a groove (5) in the groove knives, which are each formed by the opposing surfaces of the cutting shoulders of two groove knives.
- the grooving knives (3) are rigidly connected to the knife shaft (6).
- the disc knives (1) are mounted on the upper knife shaft (7) and are tensioned by the plate springs (4) against the pitch reference surface of the spacer rings (9).
- the pitch of the spacer rings (9) corresponds to the pitch of the slot knives.
- the disc springs (4) can also be replaced by other spring means.
- the immersion depth of the disc knives in the cutting shoulder (10, 11) of the slot knives is 0.1 to 1 mm, preferably 0.3 to 0.5 mm.
- the disc knives can have a rectangular cross section and a thickness of approximately 0.5 mm.
- Other disk knife shapes are also possible, for example disk knives with a chamfer which is attached to the side of the disk knife facing away from the cutting shoulder of the slot knife.
- the disc knife is preferably made of hard metal, for example the hard metal known under the trade name Widia from Krupp.
- the grooving knives (3) can also be made of hard metal, otherwise tool steel.
- the slot knives have a rectangular cross-section in the area of contact with the disk knife, and the thickness of the spacer rings (8) between two slot knives is based on the width of the strips to be cut.
- the thickness of the grooving knife and the spacer rings are each about 2 mm.
- both cutting shoulders (10, 11) of the grooving knives are ground to a roughness depth of Rt ⁇ 0.2 ⁇ m, preferably 0.1 ⁇ m.
- the cylindrical outer surface of the grooving knives is also ground to a roughness depth of Rt ⁇ 0.2 ⁇ m with every regrinding of the grooving knives, whereby two sharp cutting edges (13, 14) are created on each grooving knife.
- both knife shafts rotate in opposite directions. If the quality of cut has become unsatisfactory due to wear on the right-hand cutting shoulder after a longer period of operation, the still intact left-hand cutting shoulder (10) of the grooving knife is used, as shown in FIG. 3. This can be done, for example, by removing and turning the entire disc knife shaft (7). However, this only makes sense if the wear on the disc knives (1) is still low. Otherwise, a disk knife shaft equipped with newly ground disk knives in the manner shown in FIG. 3 is to be brought into contact with the as yet uns worn cutting shoulder (10) of the slot knives. Then you can continue cutting until the left cutting school (10) has become unusable due to wear. Only then is the grooving knife shaft removed and the cylindrical outer surfaces (12) of the grooving knives are ground down until there are sharp cutting shoulders on both sides of the grooving knife, which enable the described double use of the grooving knife shaft.
- the grooving knife can have the shape shown in FIG. 4, in which case no spacer rings are required, rather the distance (h) determines the gap width.
- the difference of the slot knife shape shown in Figure 4 compared to known, similar slot knives is that there are two side surfaces (10 ', 11') with a high surface quality, which results in two sharp cutting edges of the slot knives during regrinding, which enables the slot knife shaft to be used twice .
- the sum of the groove knife and spacer ring width will determine the width of the cut strip.
- integral multiples of this strip width can also come out as a cutting width if the disc knife shaft is equipped accordingly.
- FIG. 5 shows an example of this, the strip width corresponding to two divisions of the slot knife shaft.
- each strip to be cut lies on two lateral surfaces of the grooving knife.
- the grooving knife shaft can be used four times for each regrinding, since four cutting shoulders of the grooving knife shaft can be used within the spacing of the bandwidth.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetal Cutting Devices (AREA)
- Shearing Machines (AREA)
Description
Die Erfindung betrifft eine Schneideverfahren gemäß Oberbegriff des Anspruchs 1 (siehe DE-A-2405849).The invention relates to a cutting method according to the preamble of claim 1 (see DE-A-2405849).
Folienbahnen, insbesondere beschichtete Bahnen für photographische und magnetisierbare Materialien, werden bei der Weiterverarbeitung in eine Schar von schmalen Bändern längsgeschnitten. Unter den Längsschneideverfahren ist der Kreismesserschnitt am verbreitetsten. Dabei wirken kreisförmige, auf entsprechende Messerwellen angeordnete Ober- und Untermesser zusammen. Es ist eine Ausführung bekannt geworden, bei der das kreisförmige Obermesser (Scheibenmesser) in die Schulter eines kreisförmigen Untermessers (Nutmesser) eintaucht. Beim Schneiden von Folien mit abrasiven Schichten zum Beispiel mit Eisenoxid oder Chromdioxid beschichtete Magnetbänder, werden die Schneidekanten sehr stark abgeschliffen, wobei sich bei fortgeschrittener Benutzung das Scheibenmesser in das Nutmesser eingräbt. Wird der Kantenverschleiß größer, zum Beispiel in der Größenordnung der Foliendicke, beginnen die Messer quetschend zu schneiden, was eine schlechte Schnittqualität ergibt. Dies drücktsich in einem Abbiegen der Schnittkanten aus, was beim nachfolgenden Aufwickeln der Bänder zu ungleichmäßigen Bandwickeln führt. In diesen Fällen müssen die Messer aus den Schneidevorrichtungen ausgetauscht und nachgeschliffen werden, um wieder eine scharfe Schneidekante zu erhalten. Die Nachteile, die sich für einen rationellen Einsatz der Schneidevorrichtung aus dem wiederholten Ein- und Ausbau der Messer ergeben, liegen auf der Hand.Foil webs, in particular coated webs for photographic and magnetizable materials, are cut lengthwise into a group of narrow bands during further processing. The circular knife cut is the most common of the longitudinal cutting methods. Circular upper and lower knives arranged on corresponding knife shafts interact. An embodiment has become known in which the circular upper knife (disc knife) is immersed in the shoulder of a circular lower knife (slot knife). When cutting foils with abrasive layers, for example magnetic tapes coated with iron oxide or chromium dioxide, the cutting edges are very heavily ground off, with the disc knife digging into the groove knife in advanced use. If the edge wear increases, for example in the order of the film thickness, the knives begin to cut squeezing, which results in poor cutting quality. This is expressed in a bending of the cut edges, which leads to uneven tape winding when the tapes are subsequently wound up. In these cases, the knives must be replaced from the cutting devices and re-sharpened in order to get a sharp cutting edge again. The disadvantages that result from the repeated installation and removal of the knives for an efficient use of the cutting device are obvious.
Eine verbesserte Schneidevorrichtung, die wesentlich verlängerte Standzeit der Messer liefert, ist aus der DE-A- 24 05 849 bekannt. Dabei taucht, wie aus Figur 1 ersichtlich, ein Scheibenmesser (1), welches durch eine Tellerfeder (4) an die Schneidschulter (2) eines Nutmessers (3) gepreßt wird, etwas tiefer als die Dicke der Schneideschulter ein. Ein Nachteil dieser Vorrichtung besteht jedoch darin, daß durch das fortschreitende Abtragen der Schneideschulter des Nutmessers beim Nachschleifen des Nutmessers die Auflagefläche der zu schneidenden Folienbahn immer kleiner wird, da die Spaltbreite (b) immer größer wird, wodurch die Schnittgüte leidet. Außerdem muß der Anpreßdruck der Tellerfedern infolge des Verschleißes der Schneideschultern während des Betriebes laufend nachgestellt werden.An improved cutting device, which provides a significantly longer service life for the knives, is known from DE-A-24 05 849. As can be seen from FIG. 1, a disc knife (1), which is pressed against the cutting shoulder (2) of a slot knife (3) by a plate spring (4), plunges somewhat deeper than the thickness of the cutting shoulder. A disadvantage of this device, however, is that the progressive removal of the cutting shoulder of the slot knife while regrinding the slot knife means that the contact surface of the film web to be cut becomes smaller and smaller, since the gap width (b) becomes larger and larger, as a result of which the cutting quality suffers. In addition, the contact pressure of the disc springs must be continuously adjusted due to the wear of the cutting shoulders during operation.
Aus den IEEE-Transactions on Magnetics, Vol. Mag. 10, No. 1, Januar 1980, Seite 83, Absatz 2.13, ist ein Schneidesystem bekannt, bei dem die Scheibenmesser ohne federnde Elemente starr auf der Scheibenmesserwelle befestigt sind. Die Anpreßkraft der Scheibenmesser an die Schneideschultern der Nutmesser erfolgt durch elastische Verformung der Scheibenmesserselbst. Diese Vorrichtung hat jedoch einen gravierenden Nachteil : Infolge Ungenauigkeiten in der Geometrie der Scheiben- und Nutmesser sowie der zwischen ihnen sitzenden Distanzscheiben kann der Anpreßdruck jedes Scheibenmessers auf das zugeordnete Nutmesser verschieden sein, wobei man bedenken muß, daß oft mehr als 100 Schneideinheiten auf einer Messerwelle sitzen. Dadurch resultiert, wie Versuche mit dieser Vorrichtung ergeben haben, eine von Streifen zu Streifen wechselnde Schnittqualität und durch den erforderlichen hohen axialen Anpreßdruck verschleißen die Messer sehr schnell.From the IEEE-Transactions on Magnetics, Vol. Mag. 10, No. 1, January 1980, page 83, paragraph 2.13, a cutting system is known in which the disc knives are rigidly attached to the disc knife shaft without resilient elements. The pressing force of the disc knives on the cutting shoulders of the grooved knives is achieved by elastic deformation of the disc knives themselves. However, this device has a serious disadvantage: As a result of inaccuracies in the geometry of the disk and slot knives and the spacing disks located between them, the contact pressure of each disk knife on the associated slot knife can be different, although it must be borne in mind that often more than 100 cutting units on a knife shaft to sit. As tests with this device have shown, this results in a cutting quality which changes from strip to strip and, owing to the high axial contact pressure required, the knives wear out very quickly.
Deswegen bestand die Aufgabe, ein Schneideverfahren zu finden, welches nicht die obigen Nachteile aufweist und die insbesondere eine lange Standzeit der Scheiben- und Nutmesser erbringt, bevor ein Nachschleifen der Messer erforderlich wird.Therefore, the task was to find a cutting process that does not have the above disadvantages and that, in particular, provides a long service life for the disc and slot knives before regrinding the knives is necessary.
Die Aufgabe wurde erfindungsgemäß gelöst mit einem Schneideverfahren mit den im kennzeichnenden Teil des Anspruchs 1 genannten Merkmalen. Weitere Einzelheiten der Erfindung gehen aus dem Unteranspruch und den Zeichnungen hervor. Die Erfindung wird nun anhand der Zeichnungen unter Weglassung der die Erfindung nicht unmittelbar betreffenden Teile näher erläutert. Es zeigen
- Figur 1 einen Querschnitt durch eine Schneidevorrichtung gemäß dem Stand der Technik
Figuren 2 und 3 Querschnitte durch eine Schneidevorrichtung zur Durchführung des Verfahrens gemäß der vorliegenden Erfindung mit unterschiedlicher Position der Scheibenmesser in Bezug auf die Nutmesser.Figur 4 einen Querschnitt durch eine andere Ausführung eines NutmessersFigur 5 einen Querschnitt durch eine Schneidevorrichtung gemäßFigur 2 mit geänderter Anordnung der Kreismesserwelle.
- 1 shows a cross section through a cutting device according to the prior art
- Figures 2 and 3 cross sections through a cutting device for performing the method according to the present invention with different position of the disc knife with respect to the grooving knife.
- Figure 4 shows a cross section through another embodiment of a slot knife
- Figure 5 shows a cross section through a cutting device according to Figure 2 with a modified arrangement of the circular knife shaft.
In Figur2 ist ein Vielfachschneidewerkzeug schematisch dargestellt, wie es zur Herstellung von schmalen Bändern aus einer breiten Folienbahn benutzt wird. Die Scheibenmesser (1) und die Nutmesser (3) sind hier in gleichen Abständen auf den Messerwellen (6) beziehungsweise (7) angeordnet. Die Scheibenmesser (1) tauchen mit ihrem Umfang in eine Nut (5) in den Nutmessern ein, die jeweils durch die einander gegenüberstehenden Flächen der Schneidschultern von zwei Nutmessern gebildet werden. Die Nutmesser (3) sind starr mit der Messerwelle (6) verbunden. Dagegen sind die Scheibenmesser (1) auf der oberen Messerwelle (7) gelagert und werden durch die Tellerfedem (4) gegen die Teilungsbezugsfläche der Distanzringe (9) gespannt. DerTeilungsabstand der Distanzringe (9) entspricht dabei dem Teilungsabstand der Nutmesser. Selbstverständlich können die Tellerfedern (4) auch durch andere Federmittel ersetzt werden.In Figure 2, a multiple cutting tool is shown schematically as it is used for the production of narrow strips from a wide film web. The disc knives (1) and the grooving knives (3) are arranged on the knife shafts (6) and (7) at equal intervals. The disk knives (1) immerse with their circumference in a groove (5) in the groove knives, which are each formed by the opposing surfaces of the cutting shoulders of two groove knives. The grooving knives (3) are rigidly connected to the knife shaft (6). In contrast, the disc knives (1) are mounted on the upper knife shaft (7) and are tensioned by the plate springs (4) against the pitch reference surface of the spacer rings (9). The pitch of the spacer rings (9) corresponds to the pitch of the slot knives. Of course, the disc springs (4) can also be replaced by other spring means.
Die Eintauchtiefe der Scheibenmesser in die Schneideschulter (10, 11) der Nutmesser beträgt 0,1 bis 1 mm, vorzugsweise 0,3 bis 0,5 mm. Die Scheibenmesser können einen rechteckigen Querschnitt und eine Dicke von etwa 0,5 mm haben. Ebenso sind andere Scheibenmesserformen möglich, beispielsweise Scheibenmesser mit einer Fase, die auf der von der Schneideschulter des Nutmessers abgewandten Seite des Scheibenmessers angebracht ist. Vorzugsweise besteht das Scheibenmesser aus Hartmetall, beispielsweise das unter dem Handelsnamen Widia der Firma Krupp bekannte Hartmetall. Die Nutmesser (3) können ebenfalls aus Hartmetall bestehen, andernfalls aus Werkzeugstahl. Die Nutmesser besitzen im Bereich der Berührung mit dem Scheibenmesser rechteckigen Querschnitt und die Dicke der zwischen zwei Nutmessern befindlichen Distanzringe (8) bemißt sich nach der Breite der zu schneidenden Bänder. Beispielsweise beträgt zum Trennen in 3,81 mm breite Magnetbänder die Dicke der Nutmesser und der Distanzringe je etwa 2 mm. Bei der Herstellung der Nutmesser (3) werden beide Schneideschultern (10, 11) der Nutmesser auf eine Rauhtiefe von Rt < 0,2 µm, vorzugsweise 0,1 pm, geschliffen. Die zylindrische Mantelfläche der Nutmesser wird bei jedem Nachschliff der Nutmesser ebenfalls auf eine Rauhtiefe von Rt < 0,2 µm geschliffen, wobei zwei scharfe Schneidkanten (13, 14) an jedem Nutmesser entstehen. Nach dem Zusammenbau der oben beschriebenen Messerwellen (6, 7) liegt gemäß Figur 2 jedes Scheibenmesser an der rechten Schneideschulter (11) der Nutmesser (3) an. Beim Schneidebetrieb rotieren beide Messerwellen im gegenläufigen Sinn. Wenn nun bei längerer Betriebsdauer infolge Verschleiß der rechten Schneideschulter die Schnittgüte unzureichend geworden ist, so wird die noch intakte linke Schneideschulter (10) der Nutmesser verwendet, wie in Figur 3 dargestellt. Dies kann beispielsweise durch Abnehmen und Wenden der kompletten Scheibenmesserwelle (7) geschehen. Dies ist jedoch nur sinnvoll, wenn der Verschleiß der Scheibenmesser (1) noch gering ist. Andernfalls ist eine mit neu geschliffenen Scheibenmessern bestückte Scheibenmesserwelle in der in Figur 3 dargestellten Art mit der bisher noch unverschlissenen Schneideschulter (10) der Nutmesser in Berührung zu bringen. Danach kann weitergeschnitten werden, bis auch die linken Schneideschultem (10) durch Verschleiß unbrauchbar geworden sind. Erst dann wird die Nutmesserwelle ausgebaut, und die zylindrischen Mantelflächen (12) der Nutmesser werden abgeschliffen, bis wieder bei jedem Nutmesser beiderseits scharfe Schneideschultern vorliegen, die den beschriebenen doppelten Einsatz der Nutmesserwelle ermöglichen.The immersion depth of the disc knives in the cutting shoulder (10, 11) of the slot knives is 0.1 to 1 mm, preferably 0.3 to 0.5 mm. The disc knives can have a rectangular cross section and a thickness of approximately 0.5 mm. Other disk knife shapes are also possible, for example disk knives with a chamfer which is attached to the side of the disk knife facing away from the cutting shoulder of the slot knife. The disc knife is preferably made of hard metal, for example the hard metal known under the trade name Widia from Krupp. The grooving knives (3) can also be made of hard metal, otherwise tool steel. The slot knives have a rectangular cross-section in the area of contact with the disk knife, and the thickness of the spacer rings (8) between two slot knives is based on the width of the strips to be cut. For example, to cut into 3.81 mm wide magnetic tapes, the thickness of the grooving knife and the spacer rings are each about 2 mm. When producing the grooving knives (3), both cutting shoulders (10, 11) of the grooving knives are ground to a roughness depth of Rt <0.2 μm, preferably 0.1 μm. The cylindrical outer surface of the grooving knives is also ground to a roughness depth of Rt <0.2 µm with every regrinding of the grooving knives, whereby two sharp cutting edges (13, 14) are created on each grooving knife. After assembling the knife shafts (6, 7) described above, each disk knife rests on the right-hand cutting shoulder (11) of the grooving knife (3) according to FIG. When cutting, both knife shafts rotate in opposite directions. If the quality of cut has become unsatisfactory due to wear on the right-hand cutting shoulder after a longer period of operation, the still intact left-hand cutting shoulder (10) of the grooving knife is used, as shown in FIG. 3. This can be done, for example, by removing and turning the entire disc knife shaft (7). However, this only makes sense if the wear on the disc knives (1) is still low. Otherwise, a disk knife shaft equipped with newly ground disk knives in the manner shown in FIG. 3 is to be brought into contact with the as yet uns worn cutting shoulder (10) of the slot knives. Then you can continue cutting until the left cutting school (10) has become unusable due to wear. Only then is the grooving knife shaft removed and the cylindrical outer surfaces (12) of the grooving knives are ground down until there are sharp cutting shoulders on both sides of the grooving knife, which enable the described double use of the grooving knife shaft.
Das erfindungsgemäße Schneideverfahren hat gegenüber den bekannten Schneidevorgängen folgende Vorteile:
- - Beim Schleifvorgang entstehen bei den Nutmessem gemäß dem erfindungsgemäßen Schneideverfahren gleichzeitig zwei scharfe Kanten, die nacheinander einsetzbar sind. Dadurch liegen bezogen auf die Nutzungsdauer der Messer geringere Schneidkosten vor, was für eine rationelle Fabrikation wichtig ist
- - die Breite der Abstandsringe (8) legt die für die Schnittgüte des zu schneidenden Materials relevante Spaltbreite (5) der Nutmesser fest. Diese Spaltbreite bleibt während der gesamten Gebrauchsdauer der erfindungsgemäßen Schneidvorrichtung konstant
- - durch den konstanten Andruck der Scheibenmesser durch Tellerfedern an die Nutmesser entsteht über die gesamte Folienbahnbreite eine konstante Schnittgüte der geschnittenen Bänder.
- - During the grinding process, two sharp edges, which can be used one after the other, are produced simultaneously in the slot knives according to the cutting method according to the invention. As a result, there are lower cutting costs in relation to the service life of the knives, which is important for efficient production
- - The width of the spacer rings (8) determines the gap width (5) of the slot knives relevant for the cutting quality of the material to be cut. This gap width remains constant during the entire service life of the cutting device according to the invention
- - The constant pressure of the disc knives by disc springs on the slot knives results in a constant cutting quality of the cut strips over the entire width of the film web.
Das Nutmesser kann die in Figur 4 dargestellte Form besitzen, wobei in diesem Fall keine Distanzringe erforderlich sind, vielmehr bestimmt die Strecke (h) die Spaltbreite. Der Unterschied der in Figur4 dargestellten Nutmesserform gegenüber bekannten, ähnlichen Nutmessern besteht darin, daß hier zwei Seitenflächen (10', 11') mit hoher Oberflächengüte vorhanden sind, wodurch beim Nachschliff wieder zwei scharfe Schneidkanten der Nutmesser entstehen, was den doppelten Einsatz der Nutmesserwelle ermöglicht.The grooving knife can have the shape shown in FIG. 4, in which case no spacer rings are required, rather the distance (h) determines the gap width. The difference of the slot knife shape shown in Figure 4 compared to known, similar slot knives is that there are two side surfaces (10 ', 11') with a high surface quality, which results in two sharp cutting edges of the slot knives during regrinding, which enables the slot knife shaft to be used twice .
Normalerweise wird die Summe der Nutmesser-und Distanzringbreite die Breite des geschnittenen Bandstreifens bestimmen. Jedoch können auch ganzzahlige Vielfache dieser Bandstreifenbreite als Schnittbreite herauskommen, wenn die Scheibenmesserwelle entsprechend bestückt wird.Usually the sum of the groove knife and spacer ring width will determine the width of the cut strip. However, integral multiples of this strip width can also come out as a cutting width if the disc knife shaft is equipped accordingly.
Figur 5 zeigt dafür ein Beispiel, wobei hier die Streifenbreite zwei Teilungen der Nutmesserwelle entspricht. In diesem Fall liegt jeder zu schneidende Streifen auf zwei Mantelflächen der Nutmesser auf. Bei dem in Figur 5 gezeigten Beispiel kann die Nutmesserwelle bei jedem Nachschliff vier Mal eingesetzt werden, da innerhalb des Abstands der Bandbreite vier Schneideschultern der Nutmesserwelle einsetzbar sind.FIG. 5 shows an example of this, the strip width corresponding to two divisions of the slot knife shaft. In this case, each strip to be cut lies on two lateral surfaces of the grooving knife. In the example shown in FIG. 5, the grooving knife shaft can be used four times for each regrinding, since four cutting shoulders of the grooving knife shaft can be used within the spacing of the bandwidth.
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3701716A DE3701716C3 (en) | 1987-01-22 | 1987-01-22 | Process for cutting magnetic tapes |
DE3701716 | 1987-01-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0275909A1 EP0275909A1 (en) | 1988-07-27 |
EP0275909B1 true EP0275909B1 (en) | 1991-04-03 |
EP0275909B2 EP0275909B2 (en) | 1998-06-03 |
Family
ID=6319262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88100371A Expired - Lifetime EP0275909B2 (en) | 1987-01-22 | 1988-01-13 | Slitting machine for longitudinally slitting webs of films |
Country Status (5)
Country | Link |
---|---|
US (1) | US5085110A (en) |
EP (1) | EP0275909B2 (en) |
JP (1) | JPH06318B2 (en) |
KR (1) | KR930009108B1 (en) |
DE (2) | DE3701716C3 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3908451A1 (en) * | 1989-03-15 | 1990-09-20 | Agfa Gevaert Ag | CUTTING AND WRAPPING DEVICE FOR FILM STRIPS |
JPH0639914Y2 (en) * | 1989-03-31 | 1994-10-19 | 三菱マテリアル株式会社 | Rotary knife |
AT397481B (en) * | 1990-02-21 | 1994-04-25 | Boehler Ybbstalwerke | CIRCULAR KNIFE SCISSORS |
DE29511247U1 (en) * | 1995-07-12 | 1996-08-14 | EMTEC Magnetics GmbH, 67059 Ludwigshafen | Cobalt binder metal alloy for hard metal alloys for hard metal tools, in particular cutting tools, and hard metal tools with it |
US6536320B2 (en) * | 1998-11-19 | 2003-03-25 | Eastman Kodak Company | Slitter cutting element and method of making same |
JP3440888B2 (en) * | 1999-06-21 | 2003-08-25 | 株式会社村田製作所 | Dicing blade and method for manufacturing electronic component |
DE10111112B4 (en) * | 2001-03-08 | 2005-12-22 | Vaw Aluminium Ag | Underblade shaft for a slitter-winder |
US6996070B2 (en) * | 2003-12-05 | 2006-02-07 | Alacritech, Inc. | TCP/IP offload device with reduced sequential processing |
JP5722986B1 (en) * | 2013-12-27 | 2015-05-27 | 株式会社ブリヂストン | Heavy duty pneumatic tire |
KR102196059B1 (en) * | 2020-06-05 | 2020-12-29 | 이석현 | Cutting apparatus strip for diagnostic kit |
KR102220231B1 (en) | 2020-08-28 | 2021-02-24 | 이석현 | Cutting apparatus strip for diagnostic kit |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
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US164920A (en) * | 1875-06-29 | Improvement in rotary paper-cutters | ||
DE305586C (en) * | ||||
AT76978B (en) * | 1917-02-05 | 1919-06-25 | Ferd Emil Jagenberg Fa | Knife arrangement for roll cutting devices. |
US1673336A (en) * | 1927-05-09 | 1928-06-12 | Oscar E Lehmicke | Machine for shredding materials |
US2006106A (en) * | 1933-08-24 | 1935-06-25 | Muller J C & Co | Knife mounting for machines |
GB454623A (en) * | 1934-03-27 | 1936-09-28 | Eduard Quester | Improvements in or relating to cutting devices |
DE1878280U (en) * | 1963-03-27 | 1963-08-22 | Elsa Doering | CUTTERS FOR ROLL CUTTING MACHINES FOR PAPER OD. DGL. |
US3185010A (en) * | 1963-06-03 | 1965-05-25 | Diamond Int Corp | Slitting mechanism for endless web material |
US3286574A (en) * | 1964-04-22 | 1966-11-22 | Durand Auguste Paul | Paper slitting apparatus |
US3465631A (en) * | 1966-10-06 | 1969-09-09 | Beloit Eastern Corp | Self-sharpening slitter |
DE2304092A1 (en) * | 1973-01-27 | 1974-08-01 | Goebel Gmbh Maschf | DEVICE FOR LONGITUDINAL CUTTING NARROW STRIPS |
DE2405849C2 (en) * | 1974-02-07 | 1984-10-31 | Agfa-Gevaert Ag, 5090 Leverkusen | Cutting device for longitudinal cutting of film webs |
JPS5111084U (en) * | 1974-07-10 | 1976-01-27 | ||
JPS5175816A (en) * | 1974-12-25 | 1976-06-30 | Shin Meiwa Ind Co Ltd | SHARYONOHAIKI KANSOCHI |
JPS6210075Y2 (en) * | 1977-02-26 | 1987-03-09 | ||
DE2846747B1 (en) * | 1978-10-27 | 1980-03-27 | Dienes Werke | Precision strip cutting machine |
US4330092A (en) * | 1979-12-07 | 1982-05-18 | The Perkin-Elmer Corporation | In-line shredder apparatus |
US4428265A (en) * | 1981-10-22 | 1984-01-31 | Industrial Tools Inc. | Tape slitter axial loading system |
JPS5915800A (en) * | 1982-07-19 | 1984-01-26 | Kurita Water Ind Ltd | Fouling preventing apparatus |
US4548117A (en) * | 1983-03-25 | 1985-10-22 | Beloit Corporation | Non-dulling slitter |
US4643058A (en) * | 1984-05-10 | 1987-02-17 | Allied Corporation | Floating gang rotary slitting device and method |
-
1987
- 1987-01-22 DE DE3701716A patent/DE3701716C3/en not_active Expired - Fee Related
-
1988
- 1988-01-13 EP EP88100371A patent/EP0275909B2/en not_active Expired - Lifetime
- 1988-01-13 DE DE8888100371T patent/DE3862195D1/en not_active Expired - Lifetime
- 1988-01-18 JP JP63007095A patent/JPH06318B2/en not_active Expired - Fee Related
- 1988-01-22 KR KR1019880000478A patent/KR930009108B1/en not_active IP Right Cessation
-
1990
- 1990-05-08 US US07/520,766 patent/US5085110A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3701716C2 (en) | 1990-10-11 |
DE3862195D1 (en) | 1991-05-08 |
JPS63212494A (en) | 1988-09-05 |
EP0275909B2 (en) | 1998-06-03 |
KR930009108B1 (en) | 1993-09-23 |
US5085110A (en) | 1992-02-04 |
KR880008863A (en) | 1988-09-13 |
DE3701716C3 (en) | 1996-06-20 |
DE3701716A1 (en) | 1988-08-04 |
EP0275909A1 (en) | 1988-07-27 |
JPH06318B2 (en) | 1994-01-05 |
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