EP3766813A1 - Maschine zum herstellen von karton - Google Patents

Maschine zum herstellen von karton Download PDF

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Publication number
EP3766813A1
EP3766813A1 EP20183343.1A EP20183343A EP3766813A1 EP 3766813 A1 EP3766813 A1 EP 3766813A1 EP 20183343 A EP20183343 A EP 20183343A EP 3766813 A1 EP3766813 A1 EP 3766813A1
Authority
EP
European Patent Office
Prior art keywords
motor
braking
reel
braking torque
max
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.)
Granted
Application number
EP20183343.1A
Other languages
English (en)
French (fr)
Other versions
EP3766813B1 (de
Inventor
Marco Mariani
Ugo RE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RENOVA Srl
Original Assignee
Renova Srl
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 Renova Srl filed Critical Renova Srl
Publication of EP3766813A1 publication Critical patent/EP3766813A1/de
Application granted granted Critical
Publication of EP3766813B1 publication Critical patent/EP3766813B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
    • B65H23/08—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle acting on web roll being unwound
    • B65H23/085—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle acting on web roll being unwound and controlling web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H16/00—Unwinding, paying-out webs
    • B65H16/02—Supporting web roll
    • B65H16/06—Supporting web roll both-ends type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/044—Sensing web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
    • B65H23/063—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle and controlling web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
    • B65H23/066—Electrical brake devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/70—Clutches; Couplings
    • B65H2403/72—Clutches, brakes, e.g. one-way clutch +F204
    • B65H2403/725—Brakes
    • B65H2403/7253—Brakes pneumatically controlled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/70—Clutches; Couplings
    • B65H2403/72—Clutches, brakes, e.g. one-way clutch +F204
    • B65H2403/725—Brakes
    • B65H2403/7254—Dynamo electric brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/70—Clutches; Couplings
    • B65H2403/72—Clutches, brakes, e.g. one-way clutch +F204
    • B65H2403/725—Brakes
    • B65H2403/7255—Disc brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/32—Torque e.g. braking torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/20—Sensing or detecting means using electric elements
    • B65H2553/21—Variable resistances, e.g. rheostats, potentiometers or strain gauges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/20—Calculating means; Controlling methods

Definitions

  • the present invention relates to a machine for producing multi-layer cardboard or paper, or a machine for printing or a machine in the converting sector, starting from a reel of paper or other material.
  • the invention can be applied to machines wherein a reel of different materials is unwound and which requires a contrast system to regulate the tensioning of the ribbon.
  • the invention relates to a system for braking said reel.
  • machines for producing multi-layer cardboard typically comprise systems for unwinding paper from special reels, systems for corrugating the intermediate layer and systems for coupling and gluing the various layers.
  • braking systems are consequently comprised, which can be both mechanical (for example, caliper brakes) and pneumatic or of the motor-brake or electromagnetic powder brake type.
  • the mechanical brake has the drawback of transforming the kinetic energy, through friction, into thermal energy, which is lost by dissipation into the external environment.
  • the motor-brake has the drawback of having elevated dimensions, being costly and, in the launching and rewinding steps, having high energy consumption, characteristics necessary for implementing an adequate braking action for a large reel of paper.
  • the problem underlying the present invention is to provide a braking system, which reduces energy consumption and dispersion of energy into the environment, which has reduced dimensions and which can be integrated into machines for unwinding reels, which are already installed.
  • Figure 1 shows a support member 1 of a reel B of paper on which the braking system 2 of the invention is installed.
  • the support member 1 in the example shown in the figures, is part of a machine (not shown) for producing cardboard, in particular, for producing corrugated cardboard, which will comprise, downstream of the support member 1, a system for coupling several layers of paper and a pulling system for unwinding the paper from the reel B.
  • the reel B pulled to rotate by said pulling system during the production step, therefore supplies a drive torque, which must be regulated by means of contrast with the braking system 2 so as to ensure the necessary tensioning of the paper for a correct unrolling of the same.
  • the support member 1, commonly referred to as “rollstand”, comprises a C-shaped structure 3 having two arms 4 and a connection bar 5.
  • the distal ends 4a of the arms 4 support respective shafts 6, which rotationally support the reel B at the two proximal ends 6a thereof.
  • the braking system 2 is assembled at the distal ends 6b of the shafts 6, by means of lap joint, for example.
  • the braking system 2 is coupled to the support member 1, for example, by means of a flange coupling 7.
  • the braking system 2 of the invention comprises a motor-generator device 8 and a mechanical brake device 9, arranged coaxially.
  • the mechanical brake device 9 is assembled and therefore acts on the same shaft 10 as the motor-generator device 8.
  • the distal end 6b of the shaft 6 protrudes outside the distal end 4a of the respective arm 4 and is fastened coaxially inside the shaft 10 of the motor-generator device 8.
  • the motor-generator device 8 is an electric motor, which, by means of the interface with an inverter, can supply, depending on the case (which will be described further below) a driving torque or load torque, producing electricity in this latter case.
  • the motor-generator device 8 is undersized with respect to the braking needs of the unwinding of the reel B, especially when the latter is at the start of the unwinding and therefore has an elevated inertial mass. This allows the size and cost of the motor-generator device 8 to be limited with respect to known braking systems, which use only one motor braking system.
  • the mechanical brake device 9 is a single or multi-disk disk brake (a double disk is shown in the figure), preferably of the pneumatic type.
  • the mechanical brake device 9 is sized for a complete braking of the unwinding of the reel B, so as to intervene also in the case of emergency braking. However, in normal operating conditions, it is actuated splitting the braking torque between it and the motor-generator device 8. In this way, a partial recovery of energy is obtained in the form of electricity, unlike the known braking systems, which use only one mechanical brake and in which all of the energy deriving from the friction is released into the environment in the form of thermal energy.
  • the braking system 2 of the invention comprises a command and control unit 11 and a user interface 12 for displaying the operating parameters.
  • a machine for producing cardboard comprises two support members 1, which act alternately and which are designed to prevent a machine stop when a reel B is nearly finished and needs to be replaced with a new reel B.
  • the arrangement of two support members 1 with the relative reels B allows a quick joining of the ribbon of paper being processed with a new reel B when the reel B on the other support member 1 is almost finished.
  • the method of producing cardboard comprises the following steps:
  • the motor-generator device 8 can act both as a motor, i.e. supplying a drive torque, and as a generator, i.e. supplying a braking torque.
  • the motor-generator device 8 acts as a motor in the start-up step (called reel launch step), in conjunction with the pulling system so as to overcome the resistance due to the inertial mass of the reel B, and in the step of replacing the reel, so as to rewind the remaining ribbon of paper after the cutting and joining of the new reel B.
  • the motor-generator device 8 acts as a generator during the normal production step of the machine.
  • the command and control unit 11 is configured to command the operation of four braking systems 2, i.e. two braking systems 2 for each of the two support members 1, and for sending the electricity produced by the motor-generator device 8 to the power supply network E during the operational step.
  • the command and control unit 11 comprises four circuit boards 11a for commanding the braking action and a circuit board 11b for managing the sending of the electricity produced to the power supply network E.
  • each reel will comprise only one braking system 2, so the command and control unit 11 will comprise only two circuit boards 11a for controlling the braking action.
  • command and control unit 11 is configured to perform the following operations:
  • Step i) is carried out by means of opportune machine sensors, for example, a photocell sensor for monitoring the diameter of the reel B.
  • the motor-generator device 8 is further provided with a "resolver” or “encoder” for reading the number of turns of the shaft 10. The pulling force of the line is detected by means of a jumper or by means of load cells.
  • Step iv) is carried out in the following way:
  • Such an operating sequence allows the recovery of energy to be sent to the power supply network E to be optimized, keeping the braking torque supplied by the motor-generator device 8 as elevated as possible.
  • the required braking torque CL is greater than CM-MAX the difference will be given by the mechanical brake device 9.
  • CL is smaller than CM-MAX, a situation which arises typically when the reel B is almost empty - so the inertial mass thereof decreases significantly - or when the reel B itself is wrapped with light paper, it is necessary to keep the mechanical brake device 9 activated to have quick reaction times in the event of emergency braking and to ensure a management of the supply of the braking torque by means of feedback action. Therefore, the mechanical brake device 9 will contribute by a percentage from 1% to 10% to the required braking torque CL.
  • step v) of commanding the mechanical brake device 9 is carried out by adjusting the air pressure of the pneumatic disk brake by means of an electric signal transducer into pneumatic pressure.
  • Figure 3 shows a different embodiment of the braking system of the invention, which is particularly adapted to be integrated into cardboard producing machines, which are already provided with a pneumatic type braking system.
  • the pulling force of the line is detected in real time by means of a detection device 13, such as a jumper or a load cell.
  • the device 13 sends an electric signal to an electro-pneumatic converter (EP converter) 14, which commands the pressure of the air, which is sent, along the lines 15, 15', to the mechanical brake devices (pneumatic) 9, for generating the necessary braking torque to ensure the preset tension value.
  • EP converter electro-pneumatic converter
  • the configuration described thus far is typical of a roll-stand with a conventional air brake.
  • the system of the invention comprises the arrangement of a shunt 15" of the pneumatic line 15, 15' operatively connected to a pressure transducer 16, which reads the air pressure along the line 15, 15' and translates it into an electric signal, which is sent to the command and control unit 11, which, by means of the previously described algorithm in step iv), calculates the braking torque and sends a command signal to the motor-generator device 8.
  • the detection device 13 will detect a tension greater than the tension requested and, as a result, the electro-pneumatic converter 14 will regulate the air pressure.
  • a quick repetitive adjustment cycle is established, which allows the equilibrium to be achieved in fractions of a second, supplying the necessary braking torque CL split, as described above, between CM and CF.
  • the braking system 2 comprises:
  • the command and control unit 11 is configured to perform the following operations:
  • the braking system 2 of the invention achieves the predetermined objects.
  • such braking system can also be integrated into machines already in use, having an air brake, simply by replacing the latter with the braking system 2, or, in the case of replacing a motor brake or a magnetic brake, providing a pressurized air supply.
  • the pneumatic lines 15, 15' to the pressure transducer 16 by means of the shunt 15" and the pressure transducer 16 to the command and control unit 11, which commands the motor-generator device 8.
  • the braking system of the invention has reduced dimensions and a contained cost, also due to the fact that the contemporary use of a mechanical brake does not require a motor-generator with elevated power.
  • the braking system 2 also allows a recovery of electricity, although only partial (i.e. relating only to the braking torque part supplied by the motor generator device 9).

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Paper (AREA)
  • Cereal-Derived Products (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP20183343.1A 2019-07-15 2020-07-01 Maschine zum herstellen von karton Active EP3766813B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000011703A IT201900011703A1 (it) 2019-07-15 2019-07-15 Macchina per la produzione di cartone

Publications (2)

Publication Number Publication Date
EP3766813A1 true EP3766813A1 (de) 2021-01-20
EP3766813B1 EP3766813B1 (de) 2023-03-22

Family

ID=68501956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20183343.1A Active EP3766813B1 (de) 2019-07-15 2020-07-01 Maschine zum herstellen von karton

Country Status (3)

Country Link
EP (1) EP3766813B1 (de)
ES (1) ES2947468T3 (de)
IT (1) IT201900011703A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200011435A1 (it) 2022-05-31 2023-12-01 Renova S R L Macchina per la produzione di cartone
EP4286309A1 (de) 2022-05-31 2023-12-06 Renova S.r.l. Maschine zur herstellung von karton

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020008173A1 (en) * 2000-05-18 2002-01-24 Daniel Burri Roll changer with motor brake
EP1591393A2 (de) * 2004-04-30 2005-11-02 Komori Corporation Verfahren zur Regelung von Bremskräften und Vorrichtung zum Zuführen von streifenförmigem Material
US20070170299A1 (en) * 2004-01-30 2007-07-26 Walter Ritter Drives pertaining to a reel changer
EP2206667A2 (de) * 2009-01-12 2010-07-14 ABB Oy Verfahren im Zusammenhang mit einem Abwickler
US8746380B2 (en) * 2010-02-08 2014-06-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for operation of a braking system of a hybrid vehicle, braking system and vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020008173A1 (en) * 2000-05-18 2002-01-24 Daniel Burri Roll changer with motor brake
US20070170299A1 (en) * 2004-01-30 2007-07-26 Walter Ritter Drives pertaining to a reel changer
EP1591393A2 (de) * 2004-04-30 2005-11-02 Komori Corporation Verfahren zur Regelung von Bremskräften und Vorrichtung zum Zuführen von streifenförmigem Material
EP2206667A2 (de) * 2009-01-12 2010-07-14 ABB Oy Verfahren im Zusammenhang mit einem Abwickler
US8746380B2 (en) * 2010-02-08 2014-06-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for operation of a braking system of a hybrid vehicle, braking system and vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200011435A1 (it) 2022-05-31 2023-12-01 Renova S R L Macchina per la produzione di cartone
EP4286309A1 (de) 2022-05-31 2023-12-06 Renova S.r.l. Maschine zur herstellung von karton

Also Published As

Publication number Publication date
ES2947468T3 (es) 2023-08-09
IT201900011703A1 (it) 2021-01-15
EP3766813B1 (de) 2023-03-22

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