WO2020147101A1 - Litho laminating machine - Google Patents

Litho laminating machine Download PDF

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Publication number
WO2020147101A1
WO2020147101A1 PCT/CN2019/072297 CN2019072297W WO2020147101A1 WO 2020147101 A1 WO2020147101 A1 WO 2020147101A1 CN 2019072297 W CN2019072297 W CN 2019072297W WO 2020147101 A1 WO2020147101 A1 WO 2020147101A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
accelerator
machine
pulley
belt
Prior art date
Application number
PCT/CN2019/072297
Other languages
French (fr)
Inventor
Zheng Yuan
Thuc-Binh PHAN
Maurizio GUGEL
Original Assignee
Bobst Grenchen Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bobst Grenchen Ag filed Critical Bobst Grenchen Ag
Priority to CN201980089357.2A priority Critical patent/CN113365808A/en
Priority to MX2021008643A priority patent/MX2021008643A/en
Priority to US17/309,986 priority patent/US11325364B2/en
Priority to PCT/CN2019/072297 priority patent/WO2020147101A1/en
Priority to EP19910598.2A priority patent/EP3911508A4/en
Publication of WO2020147101A1 publication Critical patent/WO2020147101A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2822—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard involving additional operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
    • B32B37/0053—Constructional details of laminating machines comprising rollers; Constructional features of the rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/289—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard from discrete sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
    • B31F5/04—Attaching together sheets, strips or webs; Reinforcing edges by exclusive use of adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B32B38/1825—Handling of layers or the laminate characterised by the control or constructional features of devices for tensioning, stretching or registration
    • B32B38/1833—Positioning, e.g. registration or centering
    • B32B38/1841—Positioning, e.g. registration or centering during laying up

Definitions

  • the invention relates to a litho laminating machine having a frame, an accelerator table mounted to the frame so as to be pivotable around a pivot axis, a plurality of accelerator rollers mounted on the table, and a motor for driving the accelerator rollers.
  • a litho laminating machine laminates printed sheets accurately onto single faced corrugated cardboard or corrugated sheet.
  • the corrugated board is provided in a continuous manner from a large roll, and the printed sheets have to be applied onto the corrugated board in an aligned manner.
  • the accelerator table accelerates a respective sheet in a suitable manner so as to ensure that it arrives onto the corrugated board at the desired position.
  • the accelerator table a couple of conflicting requirements exist.
  • the drive for the accelerator rollers has to be powerful so as to allow the sheets to be quickly accelerated.
  • the accelerator table shall have a low weight as it has to be moved from an operating position into a maintenance position from time to time.
  • the object of the invention is to provide a litho laminating machine which fulfils these requirements as good as possible.
  • a litho laminating machine as defined above is provided, characterized in that the motor is mounted on the frame, with a rotatable transmission element being mounted so as to have an axis of rotation which does not coincides with the pivot axis, both the motor and the accelerator rollers being connected to the transmission element.
  • the invention is based on the concept of mounting the relatively heavy motor at the frame and transmitting the drive power towards the accelerator rollers via a rotating transmission element mounted coaxially with the pivot axis of the accelerator table. This allows displacing the accelerator table around the pivot axis without there being a need to disconnect the transmission between the motor and the accelerator rollers. As the motor is mounted to the frame, it does not need to be lifted when the accelerator table is pivoted from the operating position into the maintenance position.
  • the transmission element preferably comprises a drive pulley, the accelerator rollers being connected to the drive pulley by means of a belt drive.
  • a belt drive involves a low inertia so that the accelerator rollers can be quickly accelerated to the desired speed.
  • a belt for example a toothed belt, in particular a carbon belt, is particularly suitable for connecting the accelerator rollers to the drive pulley.
  • At the accelerator table at least one tension roller is provided for maintaining the desired tension of the belt drive.
  • the belt drive can also comprise one or more intermediate rollers for guiding the belt in a suitable manner or for separating a longer drive train into shorter segments.
  • the transmission element comprises a driven pulley, the motor being connected to the driven pulley by means of a belt engaging at a motor pulley.
  • a drive belt ensures a low inertia of the drive train.
  • the diameter of the motor pulley is larger than the diameter of the driven pulley so as to increase of the couple from the motor towards the accelerator rollers.
  • the motor can in particular be an electric motor which can be easily controlled in a very precise manner regarding the speed of rotation.
  • a lifting mechanism can be provided for lifting the accelerator table from an operating position to a maintenance position.
  • Such lifting mechanism can comprise a gas spring and/or a lifting cylinder.
  • Figure 1 shows in a perspective view a part of a litho laminating machine having an accelerator table
  • Figure 2 shows in a side view the table of the machine of Figure 1 in an operating position
  • Figure 3 shows in a perspective view the table of the machine of Figure 1 in a raised maintenance position.
  • Figure 1 shows the upstream portion of a litho laminating machine 10. It has a supply 12 for printed sheets, and a schematically shown unwinding mechanism 14 for corrugated board. The printed sheets are applied onto the corrugated board and are pressed onto the corrugated board in a laminating device 16. Further components which are arranged downstream at machine 10 are not shown.
  • Machine 10 comprises a frame 18 to which an accelerator table 20 is pivotally mounted (please see also Figure 2) .
  • Table 20 is mounted to frame 18 so as to be pivotable around a pivot axis P.
  • a schematically shown lifting mechanism 22 is provided for lifting accelerator table 20 from the operating position shown in Figure 2 towards a raised maintenance position shown in Figure 3.
  • accelerator rollers 24 At the end which is opposite to pivot axis P, accelerator rollers 24 (of which only their drive axis is visible here) are provided which are used for advancing the individual printed sheets with the desired speed onto the corrugated board.
  • the accelerator rollers 24 are driven with a belt drive comprising a pulley 26 associated with accelerator rollers 24, intermediate pulleys 28, and a drive pulley 30.
  • the axis of rotation of drive pulley 30 coincides with pivot axis P.
  • belts 32 are used which here are toothed belts comprising carbon fibres.
  • Tension rollers 34 are provided which allow controlling the tension within the drive belts.
  • a driven pulley 36 is mounted to drive pulley 30 so as to rotate together therewith as a unit. Driven pulley 36 is engaged by a pulley toothed belt 38 which in turn is received on a motor pulley 40. Motor pulley 40 is driven by a motor 42 which here is an electric motor.
  • Motor pulley 40 here has a diameter which is larger than the diameter of the driven pulley. Accordingly, an increased couple is formed from motor 42 towards accelerator rollers 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

A litho laminating machine (10) having a frame (18), an accelerator table (20) mounted to the frame (18) so as to be pivotable around a pivot axis (P), a plurality of accelerator rollers (24) mounted on the table (20), and a motor (42) for driving the accelerator rollers (24), characterized in that the motor (42) is mounted to the frame (18), with a rotatable transmission element (30, 36) being mounted so as to have an axis of rotation which coincides with the pivot axis (P), both the motor (42) and the accelerator rollers (24) being connected to the transmission element (30, 36).

Description

Litho Laminating Machine
The invention relates to a litho laminating machine having a frame, an accelerator table mounted to the frame so as to be pivotable around a pivot axis, a plurality of accelerator rollers mounted on the table, and a motor for driving the accelerator rollers.
A litho laminating machine laminates printed sheets accurately onto single faced corrugated cardboard or corrugated sheet. In general, the corrugated board is provided in a continuous manner from a large roll, and the printed sheets have to be applied onto the corrugated board in an aligned manner. To this end, the accelerator table accelerates a respective sheet in a suitable manner so as to ensure that it arrives onto the corrugated board at the desired position.
Regarding the accelerator table, a couple of conflicting requirements exist. On the one hand, the drive for the accelerator rollers has to be powerful so as to allow the sheets to be quickly accelerated. On the other hand, the accelerator table shall have a low weight as it has to be moved from an operating position into a maintenance position from time to time.
The object of the invention is to provide a litho laminating machine which fulfils these requirements as good as possible.
To this end, a litho laminating machine as defined above is provided, characterized in that the motor is mounted on the frame, with a rotatable transmission element being mounted so as to have an axis of rotation which does not coincides with the pivot axis, both the motor and the accelerator rollers being connected to the transmission element. The invention is based on the concept of mounting the relatively heavy motor at the frame and transmitting the drive power towards the accelerator rollers via a rotating transmission element mounted coaxially with the pivot axis of the accelerator table. This allows displacing the accelerator table around the pivot axis without there being a need to disconnect the transmission between the motor and the accelerator rollers. As the motor is  mounted to the frame, it does not need to be lifted when the accelerator table is pivoted from the operating position into the maintenance position.
The transmission element preferably comprises a drive pulley, the accelerator rollers being connected to the drive pulley by means of a belt drive. A belt drive involves a low inertia so that the accelerator rollers can be quickly accelerated to the desired speed.
A belt, for example a toothed belt, in particular a carbon belt, is particularly suitable for connecting the accelerator rollers to the drive pulley.
At the accelerator table, at least one tension roller is provided for maintaining the desired tension of the belt drive.
The belt drive can also comprise one or more intermediate rollers for guiding the belt in a suitable manner or for separating a longer drive train into shorter segments.
Preferably, the transmission element comprises a driven pulley, the motor being connected to the driven pulley by means of a belt engaging at a motor pulley. On the motor side as well, a drive belt ensures a low inertia of the drive train.
The diameter of the motor pulley is larger than the diameter of the driven pulley so as to increase of the couple from the motor towards the accelerator rollers.
The motor can in particular be an electric motor which can be easily controlled in a very precise manner regarding the speed of rotation.
A lifting mechanism can be provided for lifting the accelerator table from an operating position to a maintenance position. Such lifting mechanism can comprise a gas spring and/or a lifting cylinder.
The invention will now be described with reference to the enclosed drawings. In the drawings,
Figure 1 shows in a perspective view a part of a litho laminating machine having an accelerator table;
Figure 2 shows in a side view the table of the machine of Figure 1 in an operating position; and
Figure 3 shows in a perspective view the table of the machine of Figure 1 in a raised maintenance position.
Figure 1 shows the upstream portion of a litho laminating machine 10. It has a supply 12 for printed sheets, and a schematically shown unwinding mechanism 14 for corrugated board. The printed sheets are applied onto the corrugated board and are pressed onto the corrugated board in a laminating device 16. Further components which are arranged downstream at machine 10 are not shown.
Machine 10 comprises a frame 18 to which an accelerator table 20 is pivotally mounted (please see also Figure 2) . Table 20 is mounted to frame 18 so as to be pivotable around a pivot axis P. A schematically shown lifting mechanism 22 is provided for lifting accelerator table 20 from the operating position shown in Figure 2 towards a raised maintenance position shown in Figure 3.
At the end which is opposite to pivot axis P, accelerator rollers 24 (of which only their drive axis is visible here) are provided which are used for advancing the individual printed sheets with the desired speed onto the corrugated board. The accelerator rollers 24 are driven with a belt drive comprising a pulley 26 associated with accelerator rollers 24, intermediate pulleys 28, and a drive pulley 30. The axis of rotation of drive pulley 30 coincides with pivot axis P.
Between drive pulley 30 and accelerator pulley 26, two belts 32 are used which here are toothed belts comprising carbon fibres. Tension rollers 34 are provided which allow controlling the tension within the drive belts.
A driven pulley 36 is mounted to drive pulley 30 so as to rotate together therewith as a unit. Driven pulley 36 is engaged by a pulley toothed belt 38 which in turn is received on a motor pulley 40. Motor pulley 40 is driven by a motor 42 which here is an electric motor.
Motor pulley 40 here has a diameter which is larger than the diameter of the driven pulley. Accordingly, an increased couple is formed from motor 42 towards accelerator rollers 24.
With the belt drives, a rotation of motor pulley 40 can be transmitted towards accelerator rollers 24, with the thus formed drive train having a low inertia so that the speed of the accelerator rollers can be changed very quickly. As the axis of rotation of driven pulley 36 and drive pulley 30 coincides with pivot axis P, moving accelerator table 20 from the operating position towards the maintenance position has no effect on the transmission from motor 42 towards accelerator rollers 24. Further, an accelerator table 20 is achieved which has a low weight as the motor is mounted to frame 18.

Claims (10)

  1. A litho laminating machine (10) having a frame (18) , an accelerator table (20) mounted to the frame (18) so as to be pivotable around a pivot axis (P) , a plurality of accelerator rollers (24) mounted on the table (20) , and a motor (42) for driving the accelerator rollers (24) , characterized in that the motor (42) is mounted to the frame (18) , with a rotatable transmission element (30, 36) being mounted so as to have an axis of rotation which coincides with the pivot axis (P) , both the motor (42) and the accelerator rollers (24) being connected to the transmission element (30, 36) .
  2. The machine of claim 1 wherein the transmission element comprises a drive pulley (30) , the accelerator rollers (24) being connected to the drive pulley (30) by means of a belt drive (32) .
  3. The machine of claim 2 wherein the belt (32) is a carbon belt.
  4. The machine of claim 2 or claim 3 wherein the belt (32) is a toothed belt.
  5. The machine of any of claims 2 to 4 wherein at least one tension roller (34) is provided.
  6. The machine of any of claims 2 to 5 wherein at least one intermediate pulley (28) is provided.
  7. The machine of any of the preceding claims wherein the transmission element comprises a driven pulley (36) , the motor (42) being connected to the driven pulley (36) by means of a belt (38) engaging at a motor pulley (40) .
  8. The machine of claim 7 wherein the diameter of the motor pulley (40) is larger than the diameter of the driven pulley (36) .
  9. The machine of any of the preceding claims wherein the motor (42) is an electric motor.
  10. The machine of any of the preceding claims wherein a lifting mechanism (22) is provided for lifting the accelerator table (20) from an operating position to a maintenance position.
PCT/CN2019/072297 2019-01-18 2019-01-18 Litho laminating machine WO2020147101A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201980089357.2A CN113365808A (en) 2019-01-18 2019-01-18 Lithographic plate laminating machine
MX2021008643A MX2021008643A (en) 2019-01-18 2019-01-18 Litho laminating machine.
US17/309,986 US11325364B2 (en) 2019-01-18 2019-01-18 Litho laminating machine
PCT/CN2019/072297 WO2020147101A1 (en) 2019-01-18 2019-01-18 Litho laminating machine
EP19910598.2A EP3911508A4 (en) 2019-01-18 2019-01-18 Litho laminating machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/072297 WO2020147101A1 (en) 2019-01-18 2019-01-18 Litho laminating machine

Publications (1)

Publication Number Publication Date
WO2020147101A1 true WO2020147101A1 (en) 2020-07-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/072297 WO2020147101A1 (en) 2019-01-18 2019-01-18 Litho laminating machine

Country Status (5)

Country Link
US (1) US11325364B2 (en)
EP (1) EP3911508A4 (en)
CN (1) CN113365808A (en)
MX (1) MX2021008643A (en)
WO (1) WO2020147101A1 (en)

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EP3911508A1 (en) 2021-11-24
US11325364B2 (en) 2022-05-10

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