EP0419813A1 - Dispositif de contrôle de machines pour la fabrication des sacs - Google Patents

Dispositif de contrôle de machines pour la fabrication des sacs Download PDF

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Publication number
EP0419813A1
EP0419813A1 EP90114898A EP90114898A EP0419813A1 EP 0419813 A1 EP0419813 A1 EP 0419813A1 EP 90114898 A EP90114898 A EP 90114898A EP 90114898 A EP90114898 A EP 90114898A EP 0419813 A1 EP0419813 A1 EP 0419813A1
Authority
EP
European Patent Office
Prior art keywords
motor
pair
preferred
welding
feed
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.)
Withdrawn
Application number
EP90114898A
Other languages
German (de)
English (en)
Inventor
Helmut Dr. Dipl.-Ing. Feustel
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0419813A1 publication Critical patent/EP0419813A1/fr
Withdrawn legal-status Critical Current

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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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/006—Controlling; Regulating; Measuring; Safety measures
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/10—Feeding or positioning webs

Definitions

  • the invention relates to a device for controlling machines for the production of bags or sacks welded from thermoplastic plastic bags or sacks with a pair of preferred rollers for the web, which is driven directly by a motor or via a gear from a motor, with a the web with welding seams, transverse welding seams or transverse welding separating seams, the pair of welding jaws provided, the movements of which are derived from a second motor via a gear, optionally with further processing devices provided with drives, such as punches, perforating knives and / or shelves or stacking devices or the like, and with a central processing unit, which controls the motors in such a way that drive energy is already supplied to the motor of the pair of welding jaws, while the motor driving the preferred roller pair still receives drive energy for driving the preferred roller pair, and that after the motor has come to a standstill rs of the preferred pair of rollers is already driven before the motor of the pair of welding jaws has come to a standstill.
  • a device of this type is known from EP publication 297 434.
  • the known device By decoupling the drives of the preferred rollers and the welding jaws, the known device enables an increase in performance not only in that the downtimes, which can be limited to the pure welding times, are independent of the preferred times, but additionally in that the running times of the motors are partially mutually exclusive overlap so that maximum performance can be avoided while avoiding idle times.
  • the object of the invention is therefore to provide a device of the type specified, the performance of which is variable up to the maximum performance.
  • this object is achieved in a device of the generic type in that the speed of the pair of preferred rollers can be changed as desired to lengthen or shorten the preferred time for a web section corresponding to a bag or sack length.
  • the device according to the invention thus makes it possible to drive the bag or sack machine with greater or lesser output in accordance with predetermined conditions or desired operating sequences.
  • the performance of the machine according to the invention can also be controlled in such a way that it not only works continuously continuously or over shorter or longer periods of time with an increased or decreased output, but also that a single cycle length is shortened or can be extended.
  • the preferred time for a web section can be extended to a time which is necessary for the removal of a stack formed from the bags or sacks.
  • the device according to the invention therefore makes it possible, without having to stop the machine and without idling cycles, to convey a formed batch with a predetermined number of items without interference during a correspondingly prolonged preferred cycle, optionally after prior processing, for example blocking, without having to intervene in the production process.
  • the machine 1 for producing bags or sacks from a tubular or semi-tubular web has a conventional web storage 2, from which the two pairs of feed rollers 3 intermittently advance the web by a section length.
  • the two pairs of preferred rollers 3 are driven by a common motor 4 via conventional intermediate gears 5, 6 or else directly by the latter.
  • the stepper motor 8 is provided, which is connected to the welding jaw 7 by conventional gear members 9.
  • a central processing unit 10 is provided to control the partially overlapping drive of the motors 4, 8.
  • the data in the central processing unit is entered via the keyboard 11.
  • the central processing unit 10 can consist of a tiny microcomputer that works with appropriately adapted software.
  • a central computer 12 can also be provided as the control unit 10, which receives the necessary data from the data input 11 via the data lines 13 Preferred time, the welding time and the cycles per minute, are fed.
  • the central computer can then determine the speed of the guide drive 14 and simultaneously control and monitor all machine functions.
  • the central computer specifies the travel speed and the positioning.
  • the guide drive 14 can consist of a motor, the rotational speed of which is determined by the central computer, and an angle encoder. If stepper motors are provided as motors, the guide drive can control an electronic drive control 15, which in turn controls the running times of the stepper motors via the step pulses.
  • the stepper motors can be provided with position control devices 17, 18 which report the respective positions back to the central computer.
  • stepper motors are only one example of possible motors. Basically, all motors that can be controlled can be used as drive motors.
  • the two pairs of preferred rollers 3 are not driven by a common motor 4 and an intermediate gear 5, as shown in FIG. 1, but rather by a motor 4, 4 '.
  • the use of two separate motors 4,4 'for the two pairs of preferred rollers avoids inflexible gears and thus makes it possible to operate the two pairs of preferred rollers in a simple manner at different speeds, so that the tension of the film web desired between the preferred pairs of rollers is simple the desired value can be set.
  • the individual pairs of preferred rollers continue to form with their drives and motors assembly units that can be easily replaced if necessary.
  • FIG. 3 a welding jaw 7 'driven by a crank mechanism is shown, which cooperates with a fixed counter jaw or counter bar 7'.
  • the first phase of Figure 3 shows the upper welding jaw 7 'lifted from the counter bar 7'.
  • the second phase represents the time at which the upper movable welding jaw 7 'has just placed on the fixed counter bar 7'.
  • the crank pin 16 has reached its lower position, while in the fourth phase it has reached the position in which the upper welding jaw 7 'is again lifted off the fixed base 7'.
  • the second to fourth phase thus represent the overpressure time and the crank angle covered during the overpressure. From FIG. 3 it is clear that the upper welding jaw 7 ⁇ rests on the counter bearing 7 ⁇ during the phases two to four, although the crank pin 16 during this Phases goes through a certain angular range. So the described repression takes place.
  • the drive motor 8 so that, for example, the welding bar is not operated at a constant speed, but is accelerated and decelerated during each revolution so that the sweat time (overpressure range) always corresponds to the required value and only the remaining rotation angle corresponding to the current number of cycles is run through. Furthermore, it is possible to switch the engine 8 so that the crankshaft comes to a brief standstill. The time it takes for the crank pin 16 to travel through a certain angle of rotation can thus be changed as required.
  • the crank drive has the advantage of easier positioning, the "welding" position being able to be traversed at the highest possible engine speed without having to reverse the speed for reversing the direction of the welding bar.
  • the "welding" position would have to be approached with a delay and left from a standstill in the opposite direction of motion with acceleration.
EP90114898A 1989-09-25 1990-08-02 Dispositif de contrôle de machines pour la fabrication des sacs Withdrawn EP0419813A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3931967A DE3931967A1 (de) 1989-09-25 1989-09-25 Vorrichtung zur steuerung von maschinen zur herstellung von beuteln oder saecken
DE3931967 1989-09-25

Publications (1)

Publication Number Publication Date
EP0419813A1 true EP0419813A1 (fr) 1991-04-03

Family

ID=6390142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90114898A Withdrawn EP0419813A1 (fr) 1989-09-25 1990-08-02 Dispositif de contrôle de machines pour la fabrication des sacs

Country Status (5)

Country Link
US (1) US5135460A (fr)
EP (1) EP0419813A1 (fr)
JP (1) JPH03132339A (fr)
CA (1) CA2026099A1 (fr)
DE (1) DE3931967A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638411A1 (fr) * 1993-08-12 1995-02-15 Cmd Corporation Méthode et appareil pour l'ajustement de soudure dans des sacs plastiques
EP0761425A1 (fr) * 1995-09-05 1997-03-12 Fmc Corporation Commande du couple pour la fabrication continue de sacs
US5660674A (en) * 1993-08-12 1997-08-26 Cmd Corporation Method and apparatus for registration of a seal and perforation on a plastic bag
US5861078A (en) * 1993-08-12 1999-01-19 Cmd Corporation Method and apparatus for detecting a seal on a plastic bag
EP3711941A1 (fr) * 2019-03-05 2020-09-23 LEMO Maschinenbau GmbH Procédé amélioré de fabrication de sacs de transport en matière plastique doté d'une bande de renforcement collée

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029440A1 (de) * 1990-09-17 1992-03-19 Windmoeller & Hoelscher Verfahren zum herstellen von kunststoffbeuteln
DE4222552C1 (de) * 1992-07-09 1994-02-10 Lemo Maschb Gmbh Verfahren und Vorrichtung zur Steuerung von Folienschweißmaschinen, insbesondere zur Herstellung von von Schlauch- oder Halbschlauchbahnen aus thermoplastischem Kunststoff abgeschweißten Beuteln oder Säcken
DE4241974C1 (de) * 1992-12-12 1993-11-25 Lemo Maschb Gmbh Vorrichtung zur Steuerung von Schweißwerkzeugen an Folienschweißmaschinen, insbesondere bei der Herstellung von Beuteln, Säcken oder dgl. aus thermoplastischen Kunststoffolienbahnen
US5897478A (en) * 1994-07-22 1999-04-27 Ranpak Corp. Cushioning conversion machine and method using encoded stock material
US6003582A (en) 1997-07-17 1999-12-21 Hudson-Sharp Machine Co. Apparatus for applying reclosable fasteners to a web of film
US6206778B1 (en) * 2000-01-21 2001-03-27 Randall L. Smith Air diffuser plenum
DE102009047362B4 (de) * 2009-11-25 2013-07-04 Windmöller & Hölscher Kg System und Verfahren zum Herstellen von Säcken oder Beuteln

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2830811A (en) * 1952-08-04 1958-04-15 Fritz Holscher Apparatus for automatically controlling the paper feed speed in large paper bag machiones
US2971416A (en) * 1954-12-31 1961-02-14 Lectromatic Devices Inc Measuring-type strip-feeding machine
EP0023117A1 (fr) * 1979-07-11 1981-01-28 Sulzer Bros (Uk) Ltd. Systèmes d'entraînement de machine
EP0263724A2 (fr) * 1986-08-05 1988-04-13 NIPPON FLUTE Co. Ltd. Procédé et appareil pour transférer et empaqueter des sacs en matière thermoplastique
EP0297434A1 (fr) * 1987-06-29 1989-01-04 WindmÀ¶ller & Hölscher Procédé pour commander des machines à fabriquer des sacs ou des sachets

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL47384A0 (en) * 1974-06-21 1975-07-28 Packaging Ind Inc Web handling apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2830811A (en) * 1952-08-04 1958-04-15 Fritz Holscher Apparatus for automatically controlling the paper feed speed in large paper bag machiones
US2971416A (en) * 1954-12-31 1961-02-14 Lectromatic Devices Inc Measuring-type strip-feeding machine
EP0023117A1 (fr) * 1979-07-11 1981-01-28 Sulzer Bros (Uk) Ltd. Systèmes d'entraînement de machine
EP0263724A2 (fr) * 1986-08-05 1988-04-13 NIPPON FLUTE Co. Ltd. Procédé et appareil pour transférer et empaqueter des sacs en matière thermoplastique
EP0297434A1 (fr) * 1987-06-29 1989-01-04 WindmÀ¶ller & Hölscher Procédé pour commander des machines à fabriquer des sacs ou des sachets

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638411A1 (fr) * 1993-08-12 1995-02-15 Cmd Corporation Méthode et appareil pour l'ajustement de soudure dans des sacs plastiques
US5518559A (en) * 1993-08-12 1996-05-21 Cmd Corporation Method and apparatus for registration of a seal on a plastic bag
US5660674A (en) * 1993-08-12 1997-08-26 Cmd Corporation Method and apparatus for registration of a seal and perforation on a plastic bag
US5861078A (en) * 1993-08-12 1999-01-19 Cmd Corporation Method and apparatus for detecting a seal on a plastic bag
EP0761425A1 (fr) * 1995-09-05 1997-03-12 Fmc Corporation Commande du couple pour la fabrication continue de sacs
EP3711941A1 (fr) * 2019-03-05 2020-09-23 LEMO Maschinenbau GmbH Procédé amélioré de fabrication de sacs de transport en matière plastique doté d'une bande de renforcement collée

Also Published As

Publication number Publication date
CA2026099A1 (fr) 1991-03-26
JPH03132339A (ja) 1991-06-05
DE3931967A1 (de) 1991-04-04
US5135460A (en) 1992-08-04

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