EP1729937B1 - Trennmaschine mit zentralem schärfungssystem - Google Patents

Trennmaschine mit zentralem schärfungssystem Download PDF

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Publication number
EP1729937B1
EP1729937B1 EP05734818A EP05734818A EP1729937B1 EP 1729937 B1 EP1729937 B1 EP 1729937B1 EP 05734818 A EP05734818 A EP 05734818A EP 05734818 A EP05734818 A EP 05734818A EP 1729937 B1 EP1729937 B1 EP 1729937B1
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EP
European Patent Office
Prior art keywords
blade
axis
grinding wheel
machine
grinding
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Not-in-force
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EP05734818A
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English (en)
French (fr)
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EP1729937A1 (de
Inventor
Mauro Gelli
Raffaello Bonacchi
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Fabio Perini SpA
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Fabio Perini SpA
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Publication of EP1729937A1 publication Critical patent/EP1729937A1/de
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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
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/12—Means for treating work or cutting member to facilitate cutting by sharpening the cutting member
    • 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
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/11—Machines or methods used for cutting special materials for cutting web rolls

Definitions

  • the present invention relates to a severing machine to cut elongated products according to the preamble of claim 1.
  • Such machines are used, for example, although not exclusively, to divide rolls or logs of wound web material, such as tissue paper or the like, into small rolls of lesser axial length.
  • the invention also relates to a method to cut elongated products according to the preamble of claim 31; such products one in particular (although not exclusively) rolls of wound web material, such as tissue paper or the like.
  • rolls or logs of tissue paper are produced with an axial length equivalent to the width of the paper material wound in reels coming from the paper mill.
  • These logs which may be up to 5 m long and more, are subsequently divided into small rolls destined for consumption, of lesser axial length and with the same diameter as the one of the log.
  • the severing machines used for this type of application include one or more blades normally each provided with a planetary motion, that is, rotating about an axis of rotation thereof, in turn rotating about another axis of rotation, mainly parallel to the axis of rotation of the blade.
  • a severing machine which makes use of a particularly shaped blade with an asymmetrical chamfer and differentiated treatments on the two sides of the cutting chamfer is described in WO-A-0021722 .
  • the blades of the severing machines perform an extremely high number of cuts per minute and the paper material forming the logs or rolls to be cut has-an abrasive and wearing action on the cutting edge of the blade. It is therefore necessary to repeatedly and frequently sharpen the cutting edge of the disc blades used in these machines.
  • the sharpening unit of a severing machine of the type indicated above comprises a pair of grinding wheels offset from each other and acting on opposite sides of the cutting chamfer of the blade.
  • several sharpening units are usually used, one for each blade (see for example US-A-4,041,813 ). Examples of sharpening units for these machines are described in WO-A-0136151 and in EP-A-0528122 .
  • the object of the invention is to produce a severing machine of the type described above which is less complex and more economical while remaining efficient.
  • the object of the invention is to produce a sharpening method which is more efficient and less complex than known methods.
  • Two or more disc blades may also be provided rotating about respective axes of rotation, which in turn rotate about a common central axis of rotation.
  • the sharpening device can therefore remain in a fixed position rather than rotating with the blade about the axis of the planetary motion of said blade. This radically simplifies the machine.
  • the contact area between blade and grinding wheel has a radial orientation, that is, theoretically lying on a line of intersection between the conical surface of the grinding wheel and of the chamfer of the blade and a plane containing the axes of the grinding wheel and of the blade. Consequently, the friction forces have a tangential orientation. This condition is advantageous with respect to what occurs in conventional sharpening units, where the friction forces have a component in radial direction, which causes tearing of chips during sharpening and the formation of burrs which make the cut of the product by the blade less clean.
  • the severing machine comprises an assembly rotating about said first axis.
  • the disc blade rotating about a second axis parallel to the first axis, is carried on this assembly, so as to obtain a planetary movement of the blade.
  • the grinding wheel or wheels of the sharpening device are advantageously disposed with the axis thereof essentially coincident with the first axis, about which the axis of rotation of the blade or blades rotates.
  • the grinding wheel or wheels do not rotate about the axis thereof, as the sharpening movement is constituted by the movement of the blade. Nonetheless, it would also be possible, if the speeds in play so require, to make the grinding wheel or wheels of the sharpening device rotate about the axis thereof.
  • the grinding wheels can be mounted idle on the axis or can be motorized and made to rotate in a direction concordant or discordant with the movement of the blade, according to the operating conditions.
  • the use of grinding wheels which do not rotate about the axis thereof is advantageous both in terms of cost and in terms of constructional simplicity and reliability of the machine.
  • the radius of the blade is suitable for the radius of the blade to be greater than the difference between the distance of said first axis from said second axis and the radius of the grinding wheel.
  • the grinding wheel or wheels of the sharpening unit have a conical active surface.
  • Other solutions would also be possible, such as grinding wheels with a flat active surface, in which case the grinding wheels must be provided with an oscillatory movement to follow the planetary movement of the blade.
  • an actuator can be provided to carry the grinding wheel or wheels of the sharpening device alternatively to an operating position in contact with said blade and to an idle position, out of contact with said blade.
  • a single actuator can be provided to move two grinding wheels, for example, coaxial to and opposite each other. In this case three respective positions can be provided: contact of the first grinding wheel with a first side of the blade, contact of the second grinding wheel with a second side of the blade, and a third idle position, in which the grinding wheels do not touch the blade.
  • the actuator can be disposed to cause translation of said at least one grinding wheel in a direction parallel to said first axis.
  • the sharpening grinding wheel or wheels are carried by a support which can be integral with a piston of a double-acting piston-cylinder actuator.
  • the sharpening device has two grinding wheels, these can be made to operate alternately, so as to make the device particularly simple.
  • said grinding wheels it would also be possible for said grinding wheels to be disposed and controlled so that they are simultaneously in an operating position in contact with said blade, on the two opposite sides of the chamfer and, alternatively, in an idle position, in which they are both out of contact with said blade.
  • the grinding wheel or wheels are connected to a fixed element by means of an elastic strip, which allows translation according to their axes, but not rotation about said axis.
  • the invention relates to a method to cut elongated products comprising the features of claim 31.
  • Figure 1 schematically illustrates (limited to the front part) the severing machine as a whole, indicated with 1.
  • the machine has a feed path of the logs to be cut, indicated with L, which are pushed by pushers 3 connected to a flexible chain member or the like 5, fed about return wheels supported by a fixed structure 7.
  • L a feed path of the logs to be cut
  • L a flexible chain member or the like 5
  • the flexible members 5 are more than one in parallel to feed several rows of logs L according to parallel paths.
  • the flexible members 5 associated with the various parallel feed channels of the logs can be motorized independently from one another to stagger the movement of the logs in the individual feed channels.
  • the numeral 11 generically indicates a cutting head which, by means of a support 13, carries a rotating assembly 17.
  • the assembly 17 rotates about a horizontal axis A-A parallel to the direction fL of feed of the logs L.
  • Mounted on the rotating assembly 17 is a disc blade 19, which rotates about the axis of rotation B-B thereof parallel to the axis A-A and to the direction of feed fL of the logs L. Consequently, the blade 19 is provided with a planetary movement about the first axis A-A.
  • the numeral 21 indicates a gearmotor which, in the manner described in greater detail hereunder, provides the rotating assembly 17 with the rotating movement about the axis A-A and the blade 19 with the rotating motion about the axis B-B.
  • a second motor 29 rotates the return wheel 9 of the rotating member 5.
  • each channel can be associated with a return wheel 9 provided with its own drive 29 suitably controlled as a function of the angular position of the rotating assembly 17.
  • a programmable control unit, indicated with 35, synchronizes the forward movement of the flexible member or members 5 by means of the motor or motors 29 with the angular position of the rotating assembly 17 by controlling the motor 21.
  • the rotating assembly 17 is keyed onto a hub 41 in turn keyed onto an output shaft 43 of the motor 21.
  • the rotating assembly 17 carries a sleeve 45 extending parallel to the axis A-A and inside which a shaft 49 is supported, by means of bearings 47.
  • the rotating disc blade 19 is fixed on the shaft 49.
  • the end of the shaft 49, opposite the end carrying the blade, forms a pinion 51 which meshes with a ring gear 53 fixed to a fixed plate 55 carrying the motor 21.
  • This arrangement means that when the axis B-B of the shaft 49 and of the blade 19 is made to rotate by the motor 21 about the axis A-A, the pinion 51 rolls on the ring gear 53 and produces rotation of the shaft 49 about the axis B-B thereof, thus obtaining a planetary movement of the blade 19 about the axis A-A.
  • the movement is represented schematically in Figure 4 through a series of successive positions of the blade 19. The envelope of these positions defines a circumference C coaxial to the axis A-A.
  • the sharpening device Disposed coaxially to the axis A-A is the sharpening device, indicated as a whole with 61 and described in greater detail with reference to Figure 3 .
  • the sharpening device comprises a pair of grinding wheels 63 and 65 having respective frustum-conical active surfaces 63A and 65A. These surfaces act on the chamfer B of the blade 19.
  • the radius of the blade 19 both before use and at the end of its useful life is such that the chamfer B is always located in the intermediate area defined by the two opposite frustum conical surfaces 63A and 65A of the blades 63 and 65.
  • the radius thereof is greater than the difference between the distance of the first axis A-A from the second axis B-B and the radius of the grinding wheels 63, 65, i.e.
  • Figure 3 shows the positions of the cutting chamfer of the blade 19 in the condition when the blade is new (chamfer B) and when the blade is at the end of its useful life (chamfer B1).
  • a spacer ring 67 Disposed between the two grinding wheels 63 and 65 is a spacer ring 67.
  • the two grinding wheels 63, 65, with the spacer ring 67 interposed, are blocked by means of a ring nut 69 engaging on the threaded portion 71 of a shaft 73 against a shoulder 73S of said shaft 73.
  • the shaft 73 forms the rod of a piston indicated as a whole with 75, housed in a cylinder 77 formed by a cylindrical body 79 and by a front flange 81.
  • the piston 75 and the cylinders 77 define two chambers with variable volume 77A and 77B, flowing into which are two ducts 83A and 83B, which extend parallel to the axis of the shaft 73 between respective top connections 85A and 85B and openings 87A and 87B composed of transverse perforations produced in the shaft 73, intersecting the holes or ducts 83A and 83B.
  • the shaft 73 is prevented from rotating about the axis A-A with respect to the cylindrical body 79 through the effect of a groove 91, engaging inside which is a front key 93 clamped on the end of the shaft 73 located inside the cylinder 77.
  • This arrangement prevents the grinding wheels from drawing in rotation the shaft 73 carrying them even when said grinding wheels are brought into contact with one or other of the two sides of the chamfer B of the blade 19 to sharpen it, according to the methods described in greater detail hereunder.
  • the piston 87 can be moved towards an intermediate position, shown in Figure 3 (in the absence of pressure in one or other of the two chambers 77A, 77B) by means of an elastic system comprising a plurality of helical compression springs 95 and 97 housed in holes 99 and 101 produced in the flange 81 and in the cylindrical body 79 respectively.
  • Each spring 95, 97 extends from the base of the respective hole 99, 101 to the piston 75.
  • Integral with the piston 75 are pins 103 and 105, which are inserted axially into the springs 95 and 97 to keep them guided. If there is no pressure unbalance between the chambers 77A and 77B, the antagonist springs 95, 97 hold the piston 75 in the intermediate position shown in Figure 3 . In this position the two grinding wheels 63 and 65 are not in contact with the blade 19, which is on the plane of symmetry of the two active frustum conical surfaces 63A and 65A of the two grinding wheels.
  • the blade it would also be possible for the blade to have an asymmetrical chamfer, that is, with the sides inclined differently on the two sides of the blade, as is known from the prior art documents mentioned in the introductory part of this description. It would also be possible to use a blade-which only requires to be sharpened on one side of the chamfer, in which case a single grinding wheel 63 or 65, which can alternately be brought into contact and taken out of contact with the blade 19, will be keyed onto the shaft 73. According to the type of blade used, it would also be possible to use grinding wheels 63, 65 which have the same or a different hardness, grain and/or other chemical-physical properties.
  • the blade 19 has parallel flat faces, that is, with a constant thickness from the outer edge (naturally excluding the chamfer B) to the inner edge in proximity of the supporting axis.
  • This is the preferred configuration as it allows a particularly economical blade to be obtained, which blade maintains its characteristics of thickness along the entire useful annular band which is gradually consumed by the action of the sharpening grinding wheels 63, 65.
  • the blade 19 could also be delimited by opposite conical surfaces, thus having a thickness gradually increasing from the outer edge towards the axis.
  • the cylindrical body 79 which forms, with the front flange 81, the cylinder 77 in which the piston 75 is inserted and slides, is supported by means of bearings 107 inserted inside a bushing 109.
  • the latter is fixed by means of screws 110 on the hub 41.
  • Interposing of the bearings 107 between the bushing 109 and the cylindrical body 79 means that the latter, with the shaft 73 housed therein, can be held fixed, that is, without rotating, while the shaft 43 controlled by the gearmotor 21 rotates to make the hub 41, the rotating assembly 17 and the blade 19 rotate.
  • an elastic strip 111 is fixed at the end of the shaft 73, with the opposite end of said strip connected to a column 113 fixed to the fixed structure or plate 55.
  • bending of the elastic strip 111 allows the limited axial movement required by the shaft 73 to alternately bring the grinding wheel 63 and the grinding wheel 65 into contact with the sides of the chamfer B of the blade 19.
  • the elastic strip 111 prevents the shaft 73 and the cylindrical body 79 from being drawn in rotation together with the hub 41.
  • the axis of the grinding wheels 63 and 65 is stationary and coincides with the axis A-A of the rotating assembly 17. Moreover, the grinding wheels do not rotate with the assembly 17.
  • the sharpening movement is, in fact, allocated solely to the blade 19 which ( Figure 4 ), through the effect of the planetary movement thereof, defines with the cutting edge thereof the envelope circumference C. This lies on a cylindrical surface coaxial to the axis A-A and intersecting the active surfaces 63A and 65A of the two grinding wheels 63 and 65. Sharpening is therefore obtained thanks to the planetary movement of the blade 19, while the grinding wheels remain fixed.
  • the sharpening device 61 when the sharpening device 61 has two grinding wheels 63, 65 as in the example shown, these will act alternately, causing stress on the blade 19 in a direction essentially parallel to the axis B-B. This stress can cause a slight bending of the blade which, in any case, has minimum and negligible repercussions on the cut of the logs L.
  • one or other of said grinding wheels can be operated alternately when the blade 19 has withdrawn from the product to be cut. This is compatible with the sharpening requirements, considering that the blade 19 is engaged in the product to be cut for a relatively limited arc (indicatively 120°) of the circular trajectory thereof about the axis A-A.
  • radial pins 73P used as a reference for the grooves 63B, 63C and 65B, 65C of the grinding wheels 63, 65 respectively.
  • the two grinding wheels are placed on the shaft 73 so that they can engage with the pins 73P at the level of the grooves 63B and 65B.
  • the ring nut 69 can be unscrewed, the grinding wheels 63, 65 partially removed to disengage them from the pins 73P, rotated by 180° about the axis A-A and then re-inserted, inserting the pins 73B in the grooves 63C and 65C respectively. In this way, by performing the repositioning operation once or several times by rotating the grinding wheels by 180°, even wear is obtained on the grinding wheels and, consequently, an optimal use thereof.
  • the two grinding wheels 63, 65 are operated by a single piston-cylinder system 77, 75 to bring them into contact with the blade 19 alternately. It would also be possible to provide a sharpening device 61 in which the grinding wheels 63, 65 are provided with two independent actuators to be respectively moved towards and away from the two sides of the chamfer B of the blade 19.
  • FIGs 5 and 6 schematically show a modified embodiment of the grinding wheels of the sharpening unit.
  • the grinding wheels again indicated with 63 and 65, are produced in segments.
  • each grinding wheel has a central hub 63X, 65X, extending from each of which are segments of a respective conical wall, indicated with 63Y and 65Y.
  • the segments of the two grinding wheels intersect, as can be seen in the section in Figure 5 and disposed on the convex surfaces of the segments of conical wall are hard abrasive facings which act on the sides of the chamfer of the blade 19.
  • the movement towards the sides of the chamfer of the blade 19 is obtained by reciprocally moving the grinding wheels away from, rather than towards each other.
  • the moving towards and away from movement can be obtained in various ways, for example, by means of a pneumatic or hydraulic piston-cylinder system, by means of an articulated parallelogram control or, as shown in the drawing, by means of a shaft 74 which has two threaded portions 74A, 74B with opposed threads, so that rotation of the shaft 74 in one direction causes the grinding wheels to move reciprocally towards each other and in the other direction causes the grinding wheels to move away from each other.
  • the movement to move the grinding wheels away from and towards each other can be used to bring the grinding wheels into contact-with the blade, that is, to the operating position, and to detach them from the blade and take them to the idle position. This movement is also used to recover wear on the blade. When the diameter of the blade is reduced through the effect of wear, the grinding wheels 63, 65 are moved away from each other to once again come into contact with the blade.
  • a compression spring 64 can be interposed between the two grinding wheels
  • the blade 19 is not subject to a bending force which tends to cause deformation, as the two grinding wheels act simultaneously.
  • lateral supports with respect to the grinding wheels, can be provided to act on the blade and prevent deformation thereof.
  • supporting wheels can be provided, connected rigidly to the structure of the machine, which prevent bending deformation of the blade 19 in one or other direction.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Claims (45)

  1. Trennmaschine (1) zum Schneiden länglicher Erzeugnisse (L), umfassend:
    - zumindest eine Messerscheibe (19), die mit einer Planetenbewegung um eine erste Achse (A-A) ausgerüstet ist;
    - eine Schärfeinrichtung (61) für das Messer (19) mit zumindest einer Schärf-Schleifscheibe (63, 65);
    dadurch gekennzeichnet, dass
    die Schärfeinrichtung (61) mit der Achse der zumindest einen Schleifscheibe (63, 65) in einer im Wesentlichen festen Stellung relativ zu der ersten Achse und im Wesentlichen in der Ebene der ersten Achse (A-A) angeordnet ist.
  2. Maschine nach Anspruch 1, dadurch gekennzeichnet, dass die Achse der Schleifscheibe (63, 65) im Wesentlichen mit der ersten Achse (A-A) zusammenfällt.
  3. Maschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass diese umfasst:
    - eine Anordnung (17), die um die erste Achse (A-A) rotiert;
    - an der Anordnung (17) die zumindest eine Messerscheibe (19), die um eine zweite Achse (B-B) rotiert, die im Wesentlichen parallel zu der ersten Achse (A-A) ist.
  4. Maschine nach Anspruch 3, dadurch gekennzeichnet, dass der Radius des Messers (19) größer ist als die Differenz zwischen dem Abstand der ersten Achse (A-A) von der zweiten Achse (B-B) und dem Radius der Schleifscheibe (63, 65).
  5. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest eine Schleifscheibe (63, 65) nicht um ihre Achse rotiert.
  6. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest eine Schleifscheibe (63, 65) mindestens eine konische aktive Fläche (63A, 65A) aufweist.
  7. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, gekennzeichnet durch ein Stellglied, welches die zumindest eine Schleifscheibe (63, 65) abwechselnd in eine Betriebsstellung mit Kontakt zu dem Messer (19) und in eine Lehrlaufstellung ohne Kontakt zu dem Messer (19) bringt.
  8. Maschine nach Anspruch 7, wobei das Stellglied (75, 77) derart angeordnet ist, dass es eine Translationsbewegung der zumindest einen Schleifscheibe (63, 65) in einer Richtung parallel zu der ersten Achse (A-A) bewirkt.
  9. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie zwei Schleifscheiben (63, 65) umfasst.
  10. Maschine nach Anspruch 9, dadurch gekennzeichnet, dass die zwei Schleifscheiben (63, 65) koaxial und gegenüberliegend angeordnet sind, wobei das Messer (19) in Zwischenlage zwischen den beiden Schleifscheiben angeordnet ist.
  11. Maschine nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass die beiden Schleifscheiben (63, 65) konische aktive Flächen (63A, 65A) aufweisen.
  12. Maschine nach Anspruch 10, dadurch gekennzeichnet, dass die aktiven Flächen (63A, 65A) der beiden Schleifscheiben (63, 65) auf konischen Flächen mit zueinander unterschiedlichen Scheitelwinkeln liegen.
  13. Maschine nach einem oder mehreren der Ansprüche 9 bis 12, gekennzeichnet durch ein Stellglied, welches jede der Schleifscheiben (63, 65) abwechselnd in eine Betriebsstellung mit Kontakt zu dem Messer (19) und in eine Freilaufstellung ohne Kontakt zu dem Messer (19) bringt.
  14. Maschine nach Anspruch 13, dadurch gekennzeichnet, dass das Stellglied eine mittlere Position definiert, in der sich beide Schleifscheiben (63, 65) im Abstand von dem Messer (19) befinden.
  15. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zumindest eine Schleifscheibe (63, 65) an einer Halterung (13) montiert ist, die in einer Richtung parallel zu der Achse der Schleifscheibe (63, 65) geradlinig verschiebbar ist.
  16. Maschine nach Anspruch 15, dadurch gekennzeichnet, dass die Halterung (13) integral mit einem Kolben (75) eines doppeltwirkenden Kolben-Zylinder-Stellglieds (75, 77) ausgebildet ist.
  17. Maschine nach einem oder mehreren der Ansprüche 7 bis 15, dadurch gekennzeichnet, dass die beiden Schleifscheiben (63, 65) von einer gemeinsamen Halterung (13) gehalten werden.
  18. Maschine nach einem oder mehreren der Ansprüche 5 bis 16, dadurch gekennzeichnet, dass die beiden Schleifscheiben (63, 65) komplementäre aktive Flächen (63A, 65A) aufweisen.
  19. Maschine nach Anspruch 18, dadurch gekennzeichnet, dass die beiden Schleifscheiben (63, 65) derart angeordnet sind und gesteuert werden, dass sie gleichzeitig eine Betriebsstellung mit Kontakt zu dem Messer (19) und abwechselnd dazu eine Freilaufstellung, in der sich beide nicht in Kontakt zu dem Messer (19) befinden, annehmen.
  20. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest eine Schleifscheibe (63, 65) mithilfe eines elastischen Streifens (101) mit einem fixierten Element (55) verbunden ist.
  21. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, gekennzeichnet durch eine Motorwelle (43) koaxial zu der ersten Achse (A-A), die einen Körper trägt, der einen Zylinder (77) eines Kolben-Zylinder-Stellglieds (75, 77) bildet, und zwar in solcher Weise, dass eine Rotation mit diesem verhindert wird, wobei in diesem ein Kolben (75) angeordnet ist, der starr mit der zumindest einen Schleifscheibe (65, 63) verbunden ist, und der in dem Zylinder (77) geradlinig verschiebbar ist, um die zumindest eine Schleifscheibe (63, 65) abwechselnd in eine Betriebsstellung und in eine Freilaufstellung zu bringen.
  22. Maschine nach Anspruch 21, dadurch gekennzeichnet, dass der Kolben (75) Führungsstangen (103, 105) aufweist, die in Führungslöchern (99, 101) gleiten, die in dem Zylinder (77) ausgebildet sind.
  23. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der zumindest einen Schleifscheibe (63, 65) mindestens ein elastisches Element (95, 97) zugeordnet ist, um eine Freilaufstellung zu definieren, bei der sich die Schleifscheibe (63, 65) nicht in Kontakt zu dem Messer (19) befindet.
  24. Maschine nach Anspruch 9 und 23, dadurch gekennzeichnet, dass das zumindest eine elastische Element (95, 97) eine Freilaufstellung definiert, in der sich beide Schleifscheiben (63, 65) nicht in Kontakt zu dem Messer (19) befinden.
  25. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zumindest eine Schleifscheibe (63, 65) derart gesteuert wird, dass sie in Kontakt zu dem Messer (19) kommt, wenn das Messer von den Erzeugnissen (L) zurückgezogen wird.
  26. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zumindest eine Messer (19) derart angeordnet ist und gesteuert wird, dass sich dessen Kante entlang einer virtuellen zylindrischen Hüllfläche koaxial zu der ersten Achse (A-A) und zu der Achse der Schleifscheibe (63, 65) bewegt, wobei die zylindrische Hüllfläche die aktive Fläche (63A, 65A) der zumindest einen Schleifscheibe (63, 65) schneidet.
  27. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zumindest eine Schleifscheibe zur Montage in zwei abwechselnden Positionen ausgebildet ist, und zwar versetzt um 180° zueinander um die Achse der Schleifscheibe (63, 65).
  28. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, welche Stützen für das Messer umfasst, die an den Seiten des aktiven Bereichs der Schärf-Schleifscheibe oder -scheiben (63, 65) angeordnet sind, um eine Verbiegung des Messers (19) während des Schärfens zu reduzieren oder zu verhindern.
  29. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, die zwei koaxiale und einander gegenüberliegende Schleifscheiben (63, 65) umfasst, von denen jede jeweilige aktive Flächensegmente aufweist, wobei die Segmente der einen Schleifscheibe (63, 65) versetzt zwischen den Segmenten der anderen angeordnet sind.
  30. Maschine nach Anspruch 29, wobei die beiden Schleifscheiben (63, 65) mit Steuerelementen verknüpft sind, die eine gleichzeitige Hin- und Herbewegung aufeinander zu und voneinander weg bewirken.
  31. Verfahren zum Schneiden länglicher Erzeugnisse, mit folgenden Schritten:
    - Bewegen zumindest einer Messerscheibe (19) mit einer Planetenbewegung um eine erste Achse (A-A), um die länglichen Erzeugnisse (L) zu zerschneiden,
    - Schärfen des Messers (19) mit zumindest einer Schleifscheibe (63, 65),
    dadurch gekennzeichnet, dass
    die Achse der Schleifscheibe an einer im Wesentlichen festen Stellung relativ zu der ersten Achse und im Wesentlichen in der Ebene der ersten Achse (A-A) gehalten wird.
  32. Verfahren nach Anspruch 31, dadurch gekennzeichnet, dass die Schleifscheibe (63, 65) derart angeordnet wird, dass ihre Achse im Wesentlichen mit der ersten Achse (A-A) zusammenfällt.
  33. Verfahren nach Anspruch 31 oder 32, dadurch gekennzeichnet, dass die Schleifscheibe (63, 65) nicht um ihre Achse rotiert und dass das Messer (19) in die Bewegung zum Schleifen und in eine Vorschubbewegung versetzt wird, wobei sich die Kante des Messers (19) um die erste Achse (A-A) herum bewegt.
  34. Verfahren nach einem oder mehreren der Ansprüche 31 bis 33, dadurch gekennzeichnet, dass zwei Schleifscheiben (63, 65) genutzt werden, um auf entgegengesetzte Seiten des Messers (19) zu wirken.
  35. Verfahren nach Anspruch 34, dadurch gekennzeichnet, dass die beiden Schleifscheiben (63, 65) koaxial zueinander angeordnet werden.
  36. Verfahren nach einem oder mehreren der Ansprüche 31 bis 35, dadurch gekennzeichnet, dass das Messer (19) periodisch geschärft wird, indem die zumindest eine Schleifscheibe (63, 65) abwechselnd in Kontakt zu dem Messer (19) und von diesem weg gebracht wird.
  37. Verfahren nach Anspruch 36, dadurch gekennzeichnet, dass die zumindest eine Schleifscheibe (63, 65) in Kontakt zu dem Messer (19) gebracht wird, wenn das Messer (19) von den zu schneidenden Erzeugnissen (L) gelöst wird.
  38. Verfahren nach einem oder mehreren der Ansprüche 31 bis 37, dadurch gekennzeichnet, dass die zumindest eine Schleifscheibe (63, 65) eine konische aktive Fläche (63A, 65A) aufweist.
  39. Verfahren nach einem oder mehreren der Ansprüche 31 bis 38, dadurch gekennzeichnet, dass das Messer (19) geschärft wird, indem dafür gesorgt wird, dass sich die Kante des Messers (19) auf einer virtuellen zylindrischen Hüllfläche bewegt, die koaxial zu der zumindest einen Schleifscheibe (63, 65) liegt und deren aktive Fläche (63A, 65A) schneidet.
  40. Verfahren nach zumindest den Ansprüchen 34 und 35, dadurch gekennzeichnet, dass die eine oder die andere der Schleifscheiben (63, 65) abwechselnd in Kontakt zu dem Messer (19) gebracht wird.
  41. Verfahren nach einem oder mehreren der Ansprüche 31 bis 40, dadurch gekennzeichnet, dass die Schleifscheibe oder -scheiben (63, 65) geradlinig parallel zu ihrer Achse bewegt werden, um die Schleifscheibe oder -scheiben (63, 65) abwechselnd in Kontakt zu dem Messer (19) oder von diesem weg zu bringen.
  42. Verfahren nach einem oder mehreren der Ansprüche 31 bis 41, dadurch gekennzeichnet, dass die zumindest eine Schleifscheibe (63, 65) mithilfe eines Stellglieds (75, 77) gesteuert wird, um in eine Betriebsstellung in Kontakt zu dem Messer (19) oder in eine Freilaufstellung ohne Kontakt zu dem Messer (19) gebracht zu werden, wobei das Stellglied (75, 77) den Kontaktdruck zwischen der Schleifscheibe (63, 65) und dem Messer (19) steuert.
  43. Verfahren nach Anspruch 42, dadurch gekennzeichnet, dass das Stellglied ein Kolben-Zylinder-Stellglied (75, 77) ist und dass der Kontaktdruck zwischen der Schleifscheibe (63, 65) und dem Messer (19) über den Druck der Betriebsflüssigkeit des Stellglieds gesteuert wird.
  44. Verfahren nach einem oder mehreren der Ansprüche 31 bis 43, dadurch gekennzeichnet, dass die zumindest eine Schleifscheibe (19) mithilfe eines elastischen Elements (111) in einer Freilaufstellung gehalten wird, wobei ein Stellglied die zumindest eine Schleifscheibe (63, 65) zu dem Messer (19) hin drückt, wenn das Messer (19) geschärft werden muss.
  45. Verfahren nach einem oder mehreren der Ansprüche 31 bis 44, dadurch gekennzeichnet, dass die länglichen Produkte (L) Rollen aus aufgewickeltem Bahnmaterial sind.
EP05734818A 2004-04-01 2005-03-31 Trennmaschine mit zentralem schärfungssystem Not-in-force EP1729937B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000079A ITFI20040079A1 (it) 2004-04-01 2004-04-01 Macchina troncatrice con sistema di affilatura centrale
PCT/IT2005/000177 WO2005095069A1 (en) 2004-04-01 2005-03-31 Severing machine with central sharpening system

Publications (2)

Publication Number Publication Date
EP1729937A1 EP1729937A1 (de) 2006-12-13
EP1729937B1 true EP1729937B1 (de) 2010-03-31

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CN (1) CN100522518C (de)
AT (1) ATE462540T1 (de)
DE (1) DE602005020261D1 (de)
ES (1) ES2341012T3 (de)
IT (1) ITFI20040079A1 (de)
WO (1) WO2005095069A1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005053994A1 (de) 2005-11-10 2007-05-24 Siemens Ag Diagnosevorrichtung für kombinierte und/oder kombinierbare radiographische und nuklearmedizinische Untersuchungen sowie entsprechendes Diagnoseverfahren
ITFI20130292A1 (it) * 2013-11-30 2015-05-31 Futura Spa Dispositivo per il controllo dell'affilatura di lame a nastro.
IT201700081320A1 (it) * 2017-07-18 2019-01-18 Perini Fabio Spa Gruppo di affilatura per macchina troncatrice e macchina comprendente detto gruppo
IT201900022044A1 (it) * 2019-11-25 2021-05-25 Futura Spa Macchina troncatrice per il taglio trasversale di logs di materiale cartaceo

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752999A (en) * 1953-01-19 1956-07-03 Gilbertville Woven Label Corp Automatic cutting machine
US3905260A (en) * 1974-09-06 1975-09-16 Paper Converting Machine Co Log sawing system
US4584917A (en) * 1984-12-06 1986-04-29 Paper Converting Machine Company Automatic blade diameter compensation for log saws
US5557997A (en) * 1994-04-06 1996-09-24 Paper Converting Machine Company Apparatus for transverse cutting
JPH10315185A (ja) * 1997-05-19 1998-12-02 Ishizu Seisakusho:Kk ロールペーパー切断用の円板刃物
IT1314594B1 (it) * 2000-03-28 2002-12-20 Perini Fabio Spa Macchina troncatrice per prodotti in materiale nastriforme e simili alame multiple con scarico su canali paralleli
US6644154B2 (en) * 2001-04-27 2003-11-11 Paper Converting Machine Co. Apparatus for transverse cutting
ITFI20020123A1 (it) * 2002-07-09 2004-01-09 Perini Fabio Spa Macchina troncatrice per tagliare prodotti allungati

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Publication number Publication date
ES2341012T3 (es) 2010-06-14
WO2005095069A1 (en) 2005-10-13
CN1946524A (zh) 2007-04-11
ITFI20040079A1 (it) 2004-07-01
DE602005020261D1 (de) 2010-05-12
ATE462540T1 (de) 2010-04-15
EP1729937A1 (de) 2006-12-13
CN100522518C (zh) 2009-08-05

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