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
  • 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
  • B26D1/25—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 non-circular cutting member
  • B26D1/34—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 non-circular cutting member moving about an axis parallel to the line of cut
  • B26D1/40—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 non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
  • B26D1/405—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 non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member for thin material, e.g. for sheets, strips or the like
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
  • B65C9/00—Details of labelling machines or apparatus
  • B65C9/08—Label feeding
  • B65C9/18—Label feeding from strips, e.g. from rolls
  • B65C9/1803—Label feeding from strips, e.g. from rolls the labels being cut from a strip
  • B65C9/1815—Label feeding from strips, e.g. from rolls the labels being cut from a strip and transferred by suction means
  • B65C9/1819—Label feeding from strips, e.g. from rolls the labels being cut from a strip and transferred by suction means the suction means being a vacuum drum
• • 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
  • B26D1/0006—Cutting members therefor
  • B26D2001/0066—Cutting members therefor having shearing means, e.g. shearing blades, abutting blades
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
  • B65C9/00—Details of labelling machines or apparatus
  • B65C9/08—Label feeding
  • B65C9/18—Label feeding from strips, e.g. from rolls
  • B65C9/1803—Label feeding from strips, e.g. from rolls the labels being cut from a strip
  • B65C2009/1834—Details of cutting means
  • B65C2009/1857—Details of cutting means two co-acting knifes
  • B65C2009/1861—Details of cutting means two co-acting knifes whereby one knife remains stationary

Definitions

• the invention relates to a cutting unit for a labeling unit. Furthermore, the present invention relates to a labeling unit with such a cutting unit.
• Cutting devices are known, particularly for labeling bottles or similar containers with so-called roll-fed labels, which are produced by peeling and separating a length of label from a continuous label material. These devices consist, for example, essentially of a cutting drum with at least one cutting drum knife on the drum's circumferential surface and a knife shaft with at least one counter knife.
• the cutting drum and the cutter shaft are driven synchronously around their parallel axes for the cutting process, such that the cutter shaft and the cutting drum have the same circumferential speed and the same direction of movement at least at the time of the actual cutting process.
• a counter knife on the cutter shaft is also positioned there, so that the cutting process is carried out with both knives.
• the knife gap i.e., the distance between the overlapping knives during the cutting process. This adjustment is made, for example, by adjusting the rotation angle of the cutter shaft. This means that, with the cutting drum knife in the cutting position, the rotational position of the cutter shaft corresponding to this rotational position of the cutting drum is changed so that the desired, ideally narrow, knife gap is achieved without the risk of damaging the knife.
• the angle of rotation is adjusted mechanically, for example via the gearbox driving the cutter shaft, which is specifically designed for this purpose and has a corresponding angle adjustment mechanism that can be actuated for this adjustment.
• Other embodiments of cutting units are also known, for example those with a stationary, i.e., non-rotating, counter-knife carrier, such as a cutter shaft that performs a controlled oscillating back-and-forth movement.
• the printed text DE 698 22 238 T2 A labeling device with continuous feeding of a wound label film is known, comprising a cutting device with a cutting edge arranged along the radii of a rotating roller and a non-rotating counter-cutting edge.
• a drum is provided for capturing and transferring the detached labels to a hot roller that applies adhesive to specific areas and subsequently to a container.
• the labeling device includes a one-piece elastic holder for the non-rotating counter-cutting edge, the holder of which allows a pivoting movement about a pivot point in order to move the counter-cutting edge away from or towards the cutting edge.
• a film cutting device particularly for a wrapping machine, comprising a stationary support structure, a rotating knife rotatably mounted on the stationary support structure about a first axis and carrying a first blade, and a stationary knife rotatably mounted by the support structure about a second axis parallel to the first axis for adjustment movements, carrying a second blade that interacts with the first blade.
• This publication further discloses adjusting means for changing the distance between the stationary knife and the rotating knife, which are provided for changing the working angle of the stationary knife about the second axis.
• a cutting unit according to the preamble of claim 1 is known, in particular for use in a labeling unit of a labeling machine, comprising a cutting drum driven in rotation about a drum axis with at least one
• the cutting drum knife is provided on the drum circumference, and at least one counter knife is provided, which interacts with the cutting drum knife for cutting and is held on a counter knife carrier.
• the knife gap formed between the cutting drum knife and the counter knife during cutting is adjustable by means of an adjusting element, which acts with at least one control surface on a control element of a knife gap adjustment arrangement of the counter knife carrier and/or the cutting drum and is movable relative to the control element.
• This publication is particularly distinguished by the fact that the control surface is provided on an adjusting element movable by a threaded spindle.
• a disadvantage of known cutting units is that the blade gap can only be adjusted very coarsely, and that, particularly when processing very thin label material (e.g., with a thickness in the range of 30 to 40 ⁇ m), this either leads to faulty cutting or, if an attempt is made to adjust the blade gap accordingly, to damage to the blades. Furthermore, cutting units known from the prior art are not designed to refrain from cutting a label for individual gaps in the bottle flow of the labeling unit, i.e., to temporarily disengage the counter blade from the cutting blade provided on the cutting drum.
• the present invention aims to provide a cutting unit for a labeling unit which avoids the aforementioned disadvantages and in particular enables a very fine adjustment of the knife gap and can at the same time be temporarily disengaged from the cutting knives provided on the cutting drum.
• the essential aspect of the present invention is to provide a cutting unit for a labeling unit of a labeling machine, which includes a
• the drum axis comprises a rotating, driven cutting drum with at least one cutting drum knife located on the drum's circumference.
• the cutting drum knife can be guided past a counter knife provided on a switching and adjusting device to cut a label.
• the counter knife can be pivoted between a cutting position and a standby position via a first pivot section formed on the switching and adjusting device, such that the counter knife is engaged with the rotating cutting drum knife in the cutting position and disengaged in the standby position.
• the knife gap formed between the cutting drum knife and the counter knife in the cutting position can be adjusted independently of the controlled pivoting movement of the first pivot section via a second pivot section formed on the switching and adjusting device.
• This allows both the counter knife to be disengaged from the cutting drum knife and the knife gap to be adjusted, which is particularly advantageous.
• both functions can be adjusted independently of each other.
• the switching and positioning device can be designed to pivot the first joint section between the cutting position and the waiting position in such a controlled manner that, in the case of individual gaps in the bottle flow of the labeling unit, no label is cut for at least this one empty, unoccupied container handling position on the rotor.
• the switching and actuating device has a solid-body joint by means of which the two joint sections are realized.
• both the first and second joint sections can be designed with a solid-body joint.
• the solid-body joint thus has the first and second joint sections in the form of a double solid-body joint.
• the solid-body joint is therefore designed as a double solid-body joint with the first and second joint sections. It can therefore be provided that the solid-body joint is designed as a double solid-body joint in which the first and second joint sections are exclusively connected to the solid-body joint.
• the first and second joint sections can advantageously be formed in one piece, particularly integrally with the solid joint.
• the first and/or second joint section of the solid joint can be designed to save material, for example, by means of a material constriction and/or bending at the solid joint.
• the double solid joint is thus designed to be elastically deformable, at least in the areas of its first and second joint sections.
• the solid joint can be designed as an essentially U- or C-shaped solid joint.
• the solid body joint can be provided to have a first lateral leg section, a second lateral leg section oriented essentially parallel to the first leg section, and a base leg section connecting the two lateral leg sections at a free end.
• the first joint section of the solid body joint is formed in the transition area between the first lateral leg section and the base leg section
• the second joint section is formed in the transition area between the second lateral leg section and the base leg section
• the solid body joint is designed to be elastically deformable at least in its respective joint section.
• the solid body joint is designed in one piece, in particular as a single unit.
• the switching and adjusting device is fixedly attached to a housing of the cutting unit via a holder attached to the first side leg section.
• the switching and positioning device may include a switching lever element extending in a substantially L-shape, which is connected to the base leg section with a first side to initiate a pivoting movement between the cutting position and the waiting position on the counter blade and interacts directly or indirectly with a switching device with a second side in such a way that the switching lever element can be pivoted about the first joint area in a controlled manner when an positioning movement is initiated via the switching device.
• the switching lever element has a mechanical stop in the area of its free end section on the second side, by means of which the deflection of the switching lever element between the waiting position and the cutting position can be adjusted.
• the switching and adjusting device has a knife holder on its second side leg section of the solid body joint, on which the counter knife is held in such a way that the counter knife is pivotable in a controlled pivoting movement about the first joint area directly proportional to the deflection of the switching element lever.
• the relative positioning of the knife holder provided on the second side leg section to the shift lever element can be fixed in a position-secure manner by means of a locking plate.
• the knife holder including the counter knife held thereon, is designed to be pivotable about the second joint section relative to the shift lever element for adjusting the knife gap by means of an adjusting device provided on the knife holder.
• the adjusting device may have a threaded spindle with a differential thread, wherein the threaded spindle has at least a first threaded section and a second threaded section along its shaft, both having the same thread direction but with different thread pitches, wherein the first threaded section of the threaded spindle is engaged in a mating thread of the knife holder and the second threaded section is engaged in a mating thread of the shift lever element.
• 1 is a labeling unit of a labeling machine for labeling bottles or similar containers 2 with so-called roll-fed labels 3. These labels are pulled from a supply roll 4 of endless, ribbon-like label material 3.1 and cut from the label material 3.1 to the required length for each label 3 in a cutting unit 5 of the labeling unit 1.
• the resulting labels 3 are transferred via a labeling and transfer drum 6 to the containers 2, which are moved past the labeling unit 1 on a rotor 7 of the labeling machine rotating about a vertical machine axis.
• the directions of rotation of the rotor 7 and the transfer drum 6 are indicated by arrows A and B, respectively.
• the label material 3 is drawn from a supply roll 4 by means of conveyor rollers 8 and 9 synchronously with the rotation of the rotor 7 and fed to the cutting unit 5.
• the cutting unit 5 comprises, in particular, a cutting drum 10, which is driven in a rotating direction around its vertical drum axis TA during labeling, in the opposite direction to the transfer drum 6 (arrow C).
• a cutting drum 10 is generally known to those skilled in the art in terms of its construction and function. A more detailed description is therefore omitted. Reference is made in this context only by way of example to the illustration in the printed publication. DE 20 2005 002 793 U1 The cutting drum shown and described is referenced.
• the cutting drum 10 On the circular cylindrical drum circumferential surface 10.1, the cutting drum 10 has a cutting drum knife 11 on each of its preferably opposite sides, each of which is oriented with its cutting edge parallel or substantially parallel to the drum axis TA of the cutting drum 10 and to which a counter knife 12 is assigned, so that when the cutting drum 10 rotates, the length forming the label 3 is cut from the label material 3.1 by the interaction of the cutting drum knife 11 with the counter knife 12 and is then temporarily held on the circumferential surface 10.1 of the cutting drum 10, for example by vacuum, and transferred to the transfer drum 6.
• the cutting unit 5 cuts a label 3 by guiding the rotating cutting drum knife 11 of the cutting drum 10, which is provided on a drum circumference 10.1, past the counter knife 12 provided on a switching and adjusting device 13, thus making the cut.
• the counter blade 12 is pivotable via a first joint section GA1 formed on the switching and adjusting device 13 between a cutting position SP and a waiting position WP in such a way that in the cutting position SP it is in active engagement with the rotating cutting drum blade 11 - i.e. cutting labels 3 - while in the waiting position WP the counter blade 12 is out of active engagement with the cutting drum blade 11 - i.e. it does not cut any labels 3.
• the knife gap formed in the cutting position SP between the cutting drum knife 11 and the counter knife 12 can be adjusted independently of the controlled pivoting movement of the first joint section GA1 via a second joint section GA2 formed on the switching and adjusting device 13.
• the switching and positioning device 13 can be designed to pivot the first joint section GA1 between the cutting position SP and the waiting position WP in such a controlled manner that, in the event of individual gaps in the bottle flow of the labeling unit 1, no label 3 is cut for at least this one empty, unoccupied container handling position on the rotor 7 - i.e., the counter blade 12 is briefly out of engagement with the cutting drum knife 11 provided on the cutting drum.
• the cutting unit 5 has a housing 21 on which all components and assemblies are arranged or mounted.
• the switching and actuating device 13 is also arranged on the housing 21 via a plate-shaped holder 15, preferably detachably screwed to the housing 21. All components and assemblies of the switching and actuating device 13, which are described in more detail below, are held on the plate-shaped holder 15.
• the plate-shaped holder 15 is equipped with a switching device 19 for the controlled pivoting movement of the first joint section GA1 between the cutting position SP and the waiting position WP of the counter-blade 12.
• the switching device 19 is preferably designed as a pneumatic cylinder device that can generate a bidirectional positioning movement, indicated by a double arrow D.
• the switching and actuating device 13 can have a solid-body joint 14 by means of which the two joint sections GA1 and GA2 are realized.
• both the first and second joint sections GA1, GA2 can be formed with a solid-body joint 14.
• the solid-body joint 14 thus has the first and second joint sections GA1, GA2 in the form of a double solid-body joint.
• the solid-body joint 14 is therefore designed as a double solid-body joint with the first and second joint sections GA1, GA2. It can therefore be provided that the solid-body joint 14 is designed as a double solid-body joint in which the first and second joint sections GA1, GA2 are manufactured exclusively with the solid-body joint 14.
• the first and second joint sections GA1, GA2 can advantageously be formed in one piece, in particular integrally with the solid joint 14.
• the first and/or second joint section GA1, GA2 of the solid joint 14 can be designed to save material, for example in the form of a material constriction, and/or a bend at the solid joint 14.
• the double solid joint 14 is thus designed to be elastically deformable, at least in the areas of its first and second joint sections GA1, GA2.
• the solid body joint 14 can be provided as an essentially U- or C-shaped solid body joint 14.
• FIG 4 One embodiment in which a substantially U-shaped solid-body joint 14 is provided on the holder 15 on the side opposite the switching device 19, on which the first and second joint sections GA1, GA2 are formed.
• the U-shaped solid-body joint 14 here a first side leg section 14.1 with which the solid body joint 14 is arranged on the holder 15, in particular fixedly but detachably connected to it, for example by screws.
• a second side leg section 14.2 is provided, oriented substantially parallel to the first side leg section 14.1, wherein the two side leg sections 14.1, 14.2 are connected to each other via a third base leg section 14.3, preferably extending perpendicular to the two side leg sections 14.1, 14.2.
• first joint section GA1 of the solid body joint 14 is formed in the transition area between the first lateral leg section 14.1 and the base leg section 14.3, and the second joint section GA2 is formed in the transition area between the second lateral leg section 14.2 and the base leg section 14.3.
• the solid body joint 14 is designed to be elastically deformable, at least in its respective joint sections GA1 and GA2.
• the solid body joint 14 with its first and second side leg sections 14.1, 14.2 and the base leg section 14.3 connecting the side leg sections 14.1, 14.2 is formed in one piece, in particular in one piece, and is made of a metallic material.
• the switching and actuating device 13 for initiating the pivoting movement between the cutting position SP and the waiting position WP on the counter blade 12 has a switching lever element 16 that extends essentially in an L-shape in plan view.
• the switching lever element 16 is fixedly, but detachably, arranged on the base leg section 14.3 with its first side 16.1, which is formed on a short leg, and is in particular connected to it, and interacts with the switching device 19 via a receptacle 23 with its second side 16.2, which is formed on a longer leg, such that the switching lever element 16 can pivot about the first joint section GA1 when an actuating movement is initiated via the switching device 19.
• the double pivoting movement is indicated by a double arrow E.
• the shift lever element 16 has a mechanical stop 20 in the area of its free end section on the second side 16.2, by means of which the deflection The stroke of the pivoting movement of the switching lever element 16 is adjustable between the waiting position WP and the cutting position SP.
• the stop 20 can be formed by a threaded spindle 20.1 screwed into the holder 15, on which a stop element 20.2, 20.3, for example in the form of a nut, is provided on opposite sides of the switching lever element 16.
• the stop element 20.2 located on the side of the threaded spindle 20.1 facing away from the holder 15, forms a mechanical end stop for the maximum possible deflection of the switching lever element 16.
• the counter blade 13 In this position, the counter blade 13 is in its cutting position SP, i.e., in active engagement with the cutting drum blade 12 for cutting labels 3.
• the respective end stop can be continuously adjusted by rotating the respective stop elements 20.2 and 20.3 along the longitudinal axis of the threaded spindle 20.1.
• the switching and adjusting device 13 has a knife holder 17 on its second side leg section 14.2, on which the counter knife 12 is interchangeably held, for example parallel to the drum axis TA.
• the knife has a slight inclination relative to the drum axis, for example an inclination of 0.15°.
• the knife holder 17 together with the counter knife 12 held on it is pivoted directly proportionally to the deflection of the shift lever element 16 via the solid body joint 14 during a controlled pivoting movement about the first joint axis GA1 between the cutting position SP and the waiting position WP.
• the knife holder 17 is detachably but firmly arranged on the second side leg section 14.2, preferably screwed to the second side leg section 14.2 on the outside of the second side leg section 14.2 opposite the shift lever element 16.
• the relative positioning of the knife holder 17 provided on the second side leg section 14.2 to the shift lever element 16 can be fixed in a positional manner by means of a locking plate 22.
• the locking plate 22 can be screwed to both the shift lever element 16 and the knife holder 17 by means of screws 25.
• the knife gap formed in the cutting position SP between the cutting drum knife 11 and the counter knife 12 can be adjusted independently of the controlled pivoting movement of the first joint section GA1 via the second joint section GA2 formed on the switching and adjusting device 13.
• the adjusting device 18 can absorb forces in both directions of the pivoting movement formed around the second joint section GA2.
• the adjusting device 18 can thus have a threaded spindle 18.1 with a differential thread.
• the threaded spindle 18.1 has two thread sections along its shaft, namely a first thread section W1 and a second thread section W2, both of which have the same thread direction but different thread pitches.
• the first thread section W1 of the threaded spindle 18.1 engages in a mating thread 17.1 of the knife holder 17, and the second thread section W2 engages in a mating thread 16.3 of the shift lever element 16.
• the first thread section W1 can have a larger thread pitch than the second thread section W2 of the threaded spindle 18.1.
• the thread section W1 of the threaded spindle 18.1 with the larger thread pitch slides into the mating thread 17.1 of the knife holder 17.
• the thread section W2 with the smaller pitch moves into the mating thread 16.3 of the shift lever element 16. Since a shorter distance is covered in the thread section with the smaller pitch W2 during one revolution of the threaded spindle 18.1, the two thread sections W1 and W2 of the threaded spindle 18.1 become preloaded against each other, i.e., in particular, against each other.

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• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Labeling Devices (AREA)
• Details Of Cutting Devices (AREA)

Applications Claiming Priority (2)

Publications (3)

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ID=68470503

Family Applications (1)

Country Status (6)

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• 2018
  • 2018-11-08 DE DE102018127852.7A patent/DE102018127852A1/de active Pending
• 2019
  • 2019-11-04 JP JP2021524310A patent/JP7482124B2/ja active Active
  • 2019-11-04 EP EP19798599.7A patent/EP3877271B1/de active Active
  • 2019-11-04 CN CN201980081200.5A patent/CN113165765B/zh active Active
  • 2019-11-04 US US17/288,201 patent/US11613037B2/en active Active
  • 2019-11-04 WO PCT/EP2019/080094 patent/WO2020094565A1/de not_active Ceased

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