EP0453004B1 - Automatische Maschine zum Streifenschneiden von biegbarem Bandmaterial - Google Patents

Automatische Maschine zum Streifenschneiden von biegbarem Bandmaterial Download PDF

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Publication number
EP0453004B1
EP0453004B1 EP91200493A EP91200493A EP0453004B1 EP 0453004 B1 EP0453004 B1 EP 0453004B1 EP 91200493 A EP91200493 A EP 91200493A EP 91200493 A EP91200493 A EP 91200493A EP 0453004 B1 EP0453004 B1 EP 0453004B1
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EP
European Patent Office
Prior art keywords
machine
fact
carriage
cutters
countercutters
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
Application number
EP91200493A
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English (en)
French (fr)
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EP0453004A1 (de
Inventor
Piero Barzano
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IMS SpA
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IMS SpA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • 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

Definitions

  • These machines comprise a plurality of rotary blades, called cutters, each having a respective countercutter on the opposite side of the strip of paper to be cut, said strip generally being unrolled from a feeder reel at the inlet of the machine and the plurality of strips cut from it each being rolled onto a respective outlet reel.
  • the cutters and countercutters are usually supported so as to be able to manually adjust their position in a crosswise direction to the strip to be cut, to enable the machine to be preset for slitting strips of different widths.
  • This presetting operation is usually carried out by the operator, by hand and with the machine at a standstill, before the slitting operations begin.
  • the slitting action of the cutters and countercutters is achieved by their lateral confrontation (with an action that could be likened to that of the blades of a pair of scissors), at least one of them (usually the cutter) has a crosswise adjustment device (for example, pneumatically controlled) for bringing it closer to the lateral surface of its respective countercutter.
  • This device (usually of the all-or-nothing type), however, offers the possibility of adjusting the degree of contact upon which the quality of the cut notably depends.
  • the operations to be carried in starting up a machine of known technique can therefore be summarized as: positioning the countercutters in the transversal position corresponding to the desired slitting position; subsequently positioning the cutters in place close to their respective countercutters; placing the strip between the cutters and countercutters; operating the device to bring the cutters and countercutters close together so as to start up the slitting; and lastly, starting the strip moving.
  • GB 2 072 563 discloses a machine as claimed in the preamble of claim 1, comprising cutters and countercutters which are individually and rigidly supported on motorized carriages. In such a machine deviations in the position of cutters and countercutters as well as deviations in parallelism between the blades may result in a lower quality cut. Moreover, it is impossible adjust the bearing pressure between cutters and countercutters.
  • the general object of this invention is to obviate the aforementioned problems by providing a transverse slitting machine for slitting a strip of flexible material, which has cutters and countercutters which are individually movable to enable them to move close together and to shift laterally to vary their cutting position, with the utmost speed and precision, even while the machine is in operation.
  • FIG. 1 a machine made according to this invention and generically indicated by reference 10 is shown schematically in figure 1, where the wall in the foreground has been removed to show the parts in question.
  • Said machine 10 comprises a supporting structure 11 on which are supported two box-shaped beams 12 in which slide (as can be clearly seen in figure 2) a plurality of carriages 27 with a protruding portion 13, each supporting cutter units 14 and countercutter units 15, respectively.
  • Running between the units 14 and 15 is a strip to be cut 16 which winds off a reel 17, while the plurality of cut strips each wind onto an outlet reel 18.
  • each countercutter unit comprises a rim 19 which is made to rotate by a coaxial motor 20 (of the type for example with an external rotor).
  • Each cutter unit comprises an idle wheel 21 supporting a circumferential blade 22. The idle wheel is connected to the shank 23 of a linear actuator 24 so as to bring it close to the strip to be cut in a direction perpendicular to the sliding surface of the latter.
  • Figure 3 shows the portion of the carriage 27 inside its respective supporting beam 12, to which is connected, through a slot 28 traversing the entire length of the beam, a flange 26 for supporting the cutter or countercutter unit.
  • the carriage 27 runs along a ball-bearing guide 29 secured inside the beam 12 and comprises an electric geared motor 30 with pinion 31 meshing with a rack extending transversally to the beam 12.
  • the carriage comprises, moreover, a position sensor 33 sliding along an optical line 34 extending transversally to the beam to indicate the position of the carriage with respect to the beam 12.
  • the carriage also comprises hydraulic brakes composed of pistons 35 which are fed through pipes 36, 37 and which when actuated press against an internal wall of the beam so as to lock the position of the carriage.
  • the slot 28 along which the carriages slide is closed by a thin metal plate 37 passing through each carriage in correspondence with a shaped passage 38 with end rollers 39. Disposed at the edges of the slot 28 are magnetic bands 40 to ensure that the metal plate 37 adheres to the beam, thus preventing cutting scraps from penetrating inside the beam.
  • each carriage 27 comprises on one side a proximity sensor 41 and on the other side an activating bracket 42, so that each carriage can detect the excessive closeness of another carriage sliding along the same beam.
  • figure 5 shows part of a second carriage with protruding portion 13' and with its bracket 42' actuating the sensor 41 of the carriage with protruding portion 13.
  • each idle wheel 21 supporting a cutter advantageously comprises a spring-operated mechanism enabling the blade to slide axially, so as to absorb working and position tolerances of the cutters and countercutters.
  • each wheel 21 comprises a hollow pin 43, integral with the shank 23, and supporting, by means of a bearing 44 to enable their relative axial sliding, a hub 45 in turn supporting, by means of bearings 46, a frame 47 to which the blade 22 is secured.
  • a thrust spring 48 acting between a second pin 49 secured to the hub 45 and a bush 50, the latter being screwable in order to adjust the compression of the spring 48.
  • a monitoring device 25 for example microprocessor-controlled, which monitors the motors of the carriages, the linear actuator of the cutters, the motors for rotation of the countercutters and all the position and proximity sensors, as well as the mechanism for unwinding and rewinding the strip of material being cut.
  • Said device 25, for example controllable by means of a keyboard and display unit 51, will not be further described, since it is of known technique and, especially in view of the following description, easily imaginable by any technician expert in the art.
  • the machine described above operates in the following way. First the strip to be cut (for example, a strip of paper, cardboard, etc.) is positioned between the cutters and countercutters.
  • the strip to be cut for example, a strip of paper, cardboard, etc.
  • the position of the plurality of upper and lower carriages is controlled by means of the keyboard 51, so as to position them in the required cutting position; the cutters to be used (since the number of cutters can be greater than the number of cuts required) are then lowered by operating the pistons 24, and lastly, the cutting operation is started up.
  • the position requested for each cut is processed by the device 25 which monitors the movement of the carriages by means of the motors 30 while it receives a feedback signal of their position by means of the sensors 33 which read the relative positions along the optical line 34. Any errors or failures, or simply any careless commands given by the operator, which would lead to the collision of two carriages moving along the same supporting beam, are neutralized by the proximity sensors 41 which, by means of a signal to the device 25, stop the carriages whenever they detect a bracket 42 approaching.
  • the proximity sensors 41 which, by means of a signal to the device 25, stop the carriages whenever they detect a bracket 42 approaching.
  • the signal indicating the shifting of the references marks can be sent either by hand by means of the keyboard 51, after visual detection by the operator, or automatically by means of optical systems 52, for example with photoelectric cells, which detect the position of such reference marks and communicate it to the device 25.
  • optical systems 52 for example with photoelectric cells, which detect the position of such reference marks and communicate it to the device 25.
  • the mechanism moving the strip to be cut is of known technique and therefore shown only schematically in the drawings.
  • the number of driven and non-driven rollers can obviously be extremely varied and their disposition can differ in order to adapt the machine to particular requirements, made necessary for example by the material of which the strip to be cut is made.
  • the number of carriages actually possessed by the machine will be in relation to the maximum number of cuts envisaged for that particular machine.
  • the device 25 could, for example for structural economy, be made with a piloting circuit for one motor only switchable in sequence from one carriage to the other. In this way, the device 25 connects the piloting circuit to one carriage, to enable it to move the carriage into position, locks it in place with the corresponding brake 35, switches the electric actuator on to another carriage, moves it, etc. until it has positioned and locked in place all the carriages on the machine.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Details Of Cutting Devices (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Claims (12)

  1. Maschine zum Schneiden in Längsrichtung, mittels einer Mehrzahl von Schneiden (14) und entsprechenden gegenüberstehenden rotierenden Gegenschneiden (15), zwischen denen ein kontinuierlicher Streifen (16) eines biegbaren Materials geführt ist, wobei die Schneiden (14) und Gegenschneiden (15) individuell von Wagen (27) getragen werden, die jeweils entlang einer ersten und einer zweiten Führungsschiene (29) bewegbar sind, die an den zwei Seiten des zu schneidenden Streifens (16) im wesentlichen parallel zu seiner Oberfläche und bezüglich seiner Länge gekreuzt angeordnet sind, wobei jeder Wagen (27) mit einem elektrischen Motor (30) versehen ist, der eine kinematische Kopplung aufweist, um den Wagen entlang seiner jeweiligen Führungsschiene (29) zu bewegen, und mit einer Positionsensorvorrichtung (33), um seine Position zu bestimmen, wobei jede der Schneiden auf die entsprechenden Gegenschneiden zu und von ihr fort bewegbar ist, in einer Richtung senkrecht zu dem zuschneidenden kontinuierlichen Streifen, mittels einer Linearbewegungsvorrichtung (24), wobei alle Motoren (30), alle Sensorvorrichtungen (33) und alle Linearbewegungsvorrichtungen (24) zum Zweck der Steuerung mit einer Überwachungsvorrichtung (25) verbunden sind, die die Position der Schneiden (14) und Gegenschneiden (15) steuert,
    dadurch gekennzeichnet, daß jede Schneide von ihrem jeweiligen Wagen (27) getragen wird, unter Mitwirkung einer begrenzten Gleiteinrichtung (21), die einen hohlen Stift (43) enthält, der einstückig mit der Schneidenstütze ausgebildet ist und in eine Richtung parallel zur Führungsschiene gleitend, mittels eines axial gleitenden Lagers (44) eine Nabe (45) prägt, die wiederum, mittels eines Rollenlagers (46), drehbar einen Rahmen (47) trägt, an dem die Schneide befestigt ist, und eine axiale Druckfeder (48) aufweist, die zwischen der Nabe (45) und dem hohlen Stift (43) wirkt, wobei die Feder die Schneide gegen die Gegenschneide drückt.
  2. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß die Sensorvorrichtung (33) einen Sensor zum Bestimmen von Bezugsmarkierungen enthält, die entlang einer optischen Schiene (34) angeordnet sind, die parallel ihrer jeweiligen Leitschiene (34) verläuft.
  3. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß die kinematische Kopplung einen Kolben (31) enthält, der von dem Rotor (30) betätigt wird und mit einer gezahnten Stange (32) kämmt, die parallel zur jeweiligen Leitschiene (29) angeordnet ist.
  4. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß jeder Wagen (27) eine Bremsvorrichtung enthält, die betrieben wird, um den Wagen an einer Stelle entlang der jeweiligen Leitschiene (29) zu blockieren.
  5. Maschine nach Anspruch 4, dadurch gekennzeichnet, daß jede Bremsvorrichtung wenigstens einen bewegbaren Kolben (35) enthält, der von unter Druck stehender Flüssigkeit betrieben wird, um seine Brennfläche gegen eine entsprechende feste Oberfläche an der Maschine zu drücken.
  6. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß jede Führungsschiene (29) zusammen mit dem entsprechenden Wagen (27) in einem kastenartigen Träger (12) enthalten ist, der eine längliche Öffnung (28) für den Durchgang jeden Wagens (27) einer Stütze (26) einer Schneide und Gegenschneide aufweist.
  7. Maschine nach Anspruch 6, dadurch gekennzeichnet, daß die längliche Öffnung (28) durch eine dünne Metallplatte (37) geschlossen ist, die gleitbar durch Durchgänge (38) in jeder Stütze (26) durchführbar ist.
  8. Maschine nach Anspruch 7, dadurch gekennzeichnet, daß die Kanten der länglichen Öffnungen (28) Magnete (40) enthalten, um die Metallplatte (37), die aus ferromagnetischem Material besteht, anzuziehen.
  9. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß jeder Wagen (27) einen Abstandssensor (41) enthält, der mit einer Überwachungsvorrichtung (25) verbunden ist, zum Bestimmen, ob er eine minimale Entfernung zu anderen Wagen (27) unterschreitet.
  10. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß die axiale Druckfeder (48) in dem hohlen Stift (43) über eine Buchse (50) wirkt, die axial regelbar ist, um die axiale Kompression der Feder (48) zu regeln.
  11. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß entlang des Weges des kontinuierlichen Streifens (16) Sensoren (52) zum Bestimmen von darauf angebrachten Bezugsmarkierungen angeordnet sind, wobei die Sensoren (52) mit der Überwachungsvorrichtung (25) verbunden sind, um die Verschiebung der Wagen (27) zu steuern, um Schnitte an vorherbestimmten Positionen bezüglich der Bezugsmarkierungen durchzuführen.
  12. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß die Überwachungsvorrichtung (25) eine Voreinstell- und manuelle Steuereinheit (51) enthält, die aus einem Eingabefeld und einer Anzeige zusammengesetzt ist.
EP91200493A 1990-04-20 1991-03-07 Automatische Maschine zum Streifenschneiden von biegbarem Bandmaterial Expired - Lifetime EP0453004B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2008390 1990-04-20
IT20083A IT1239999B (it) 1990-04-20 1990-04-20 Macchina automatica per il taglio di strisce in materiale flessibile

Publications (2)

Publication Number Publication Date
EP0453004A1 EP0453004A1 (de) 1991-10-23
EP0453004B1 true EP0453004B1 (de) 1994-12-07

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Application Number Title Priority Date Filing Date
EP91200493A Expired - Lifetime EP0453004B1 (de) 1990-04-20 1991-03-07 Automatische Maschine zum Streifenschneiden von biegbarem Bandmaterial

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EP (1) EP0453004B1 (de)
DE (1) DE69105594T2 (de)
IT (1) IT1239999B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017117524B4 (de) * 2017-08-02 2024-07-25 DIENES WERKE FüR MASCHINENTEILE GMBH & CO. KG Messerhalter mit Einstellschieber
CN115431340B (zh) * 2022-08-19 2024-08-09 宁德德佳胶粘科技有限责任公司 一种新型密封胶条定长切割设备及使用方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1131092B (it) * 1980-03-27 1986-06-18 Elio Cavagna Dispositivo per taglio e/o cordonatura di nastri di carta o cartone ondulato o plastica,particolarmente per produzione in continua
DE3047980C2 (de) * 1980-12-19 1984-10-31 Dienes Werke für Maschinenteile GmbH & Co KG, 5063 Overath Druckmittelbetätigter Messerhalter für Rollenschneidmaschinen
DE3247711A1 (de) * 1982-12-23 1984-06-28 German 8700 Würzburg Gresser Vorrichtung zur steigerung der masshaltigkeit bzw. messgenauigkeit durch automatische nachjustierung von elektronischen distanzmesseinrichtungen an maschinen mit mindestens zwei umlaufenden schneidscheiben
IT1169683B (it) * 1983-11-08 1987-06-03 Cavagna Elio Srl Perfezionamento ai gruppi di taglio impiegabili nel campo della cartotecnica e del tipo includente almeno un sistema di coltello circolare ruotante e contro coltello,per la recisione selettiva di materiale nastriforme in strisce di predeterminata larghezza
US5125301A (en) * 1988-06-03 1992-06-30 Tidland Corporation System for automatically positioning multiple tool-holding carriages
JP2662981B2 (ja) * 1988-06-06 1997-10-15 リンテック株式会社 スリッター装置

Also Published As

Publication number Publication date
DE69105594D1 (de) 1995-01-19
IT9020083A1 (it) 1991-10-20
IT1239999B (it) 1993-11-27
EP0453004A1 (de) 1991-10-23
IT9020083A0 (it) 1990-04-20
DE69105594T2 (de) 1995-04-20

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