EP0023117A1 - Systèmes d'entraînement de machine - Google Patents

Systèmes d'entraînement de machine Download PDF

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Publication number
EP0023117A1
EP0023117A1 EP80302368A EP80302368A EP0023117A1 EP 0023117 A1 EP0023117 A1 EP 0023117A1 EP 80302368 A EP80302368 A EP 80302368A EP 80302368 A EP80302368 A EP 80302368A EP 0023117 A1 EP0023117 A1 EP 0023117A1
Authority
EP
European Patent Office
Prior art keywords
web
machine
processor
micro
conveyor
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Withdrawn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
EP80302368A
Other languages
German (de)
English (en)
Inventor
David William Burke
Arthur Hall
Edward George Calvert
James Houghton
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.)
Sulzer AG
SULZER BROS (UK) Ltd
Original Assignee
Sulzer AG
SULZER BROS (UK) Ltd
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 Sulzer AG, SULZER BROS (UK) Ltd filed Critical Sulzer AG
Publication of EP0023117A1 publication Critical patent/EP0023117A1/fr
Withdrawn legal-status Critical Current

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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
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • B65H20/04—Advancing webs by friction roller to effect step-by-step advancement of web
    • 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

  • This invention relates to a drive system which finds particular although not exclusive application in machines used for processing webs of material such as synthetic plastics material webs, paper webs or the like.
  • the invention finds particular, although not exclusive application in a machine for forming synthetics plastics material bags from a web of such material.
  • the present invention provides a drive system for a machine comprising_an electric stepping motor in combination with an electronic micro-processor arranged to provide pulses of power to the 'stepping motor in accordance with a predetermined programme.
  • the present invention provides a web treating machine comprising means for conveying a web of material through 'the machine driven by such a stepping motor.
  • the invention provides a plastics material web treating machine comprising a number of web treating stations and conveyor means for carrying a web to be treated through those treating stations, an electric stepping motor arranged to.drive the conveyor means, and an electronic micro-processor arranged to supply pulses of electric power to the stepping motor in accordance with a predetermined programme for the movement of the web through the machine.
  • the invention provides a machine for forming synthetic plastics material bags from a web of synthetic plastics material comprising a number of web treating stations and conveyor means for conveying a web to be treated through those treating stations, an electric stepping motor arranged to drive the conveyor means and an electronic micro-processor arranged to supply pulses of electric power to the stepping motor in accordance with a predetermined programme for the movement of the web through the machine.
  • the machine shown in the drawing is in general arrangement similar to known machines and comprises a conveyor system which takes a web of plastics material from a roll of such web indicated at 10, over a generally table- like conveyor indicated at 11 to carry the web successively past various operative stations which transform the web into a series of plastic bags.
  • the roll of web 10 is supported on a suitable shaft carried in known manner per 'se in trunnion bearings 12 on the base of the machine so that the web indicated at 14 may be drawn off by a capstan roller 15, a nip roller 16 being provided to maintain the web 14 in frictional engagement with capstan roller 15.
  • the capstan drive motor is an electric stepping motor 17 which is driven in a manner to be discussed.below.
  • the web 14 is drawn over guide rollers 18, 19 and 20 and continues to a dancing roll compensator mechanism indicated generally at 21.
  • the mechanism 21 comprises a series of fixed rollers 22 and a series of movable rollers 23 which arc biassed away from the rollers 22 by means of a pneumatic spring compensator device indicated at 24.
  • the web 14 continues through the machine through the nip between a pair of draw rollers 25 and 26.
  • the draw roller 26 is driven by means of an electric stepping motor 27 which.is controlled in a manner to be described below.
  • a hot knife station Downstream of the draw rollers 25 and 26 is a "hot knife” station indicated generally at 28 the arrangement and operation of which to produce individual bags from the web will be described below.
  • the conveyor.system 29 is driven by an electric stepping motor 31, the control of which will be discussed below, and the stacking arrangement 30 includes an indexible conveyor system 32 which is provided with an electric stepping motor 33 to drive it,the control of which.stepping motor will also be discussed below.
  • the general principle of operation of the machine is similar to known machines in so far as a web of plastics material is provided in the roll 10, either in the form of a tube, or in the form of a folded double thickness open at one'edge, and this web is conveyed through the machine being slit and sealed in various configurations to form bags.
  • the general operation of the machine is under the control of an electronic micro-processor indicated at 40.
  • the internal design and arrangement of the micro-processor 40 does not form part of the present invention or disclosure.
  • the micro-processor 40 is programmed and arranged to supply the capstan drive stepping motor 17 with a series of pulses of electrical current so that it is driven to drive the capstan roller 15 and draw web from the roll 10 on the trunnions 12.
  • a transducer 41 is provided to give an electrical output indicative of the position of the rollers 23 in relation to the rollers 22 in the compensating device 21, and the micro-processor 40 is programmed to drive the motor 17 to maintain a given quantity of web in the compensator 21 in a stable fashion, thus to provide a reservoir of web for feed to the 'draw rollers 25 and 26.
  • a limit transducer 42 ' is provided to sense the upper and lower positions of the rollers 23 and the output from the transducer 42 is fed to the micro-processor to provide a warning signal to an operator of the machine, or other control of the machine such as shut-down upon certain limits on the position of the rollers 23 being exceeded.
  • the stepping motor 17 is operated basically in a continuous mode so that the web 14 is moving continuously over the idler rollers 19 and 20 to the compensator device 21.
  • the portion of the web passed between the rollers 19 and 20 may be considered as a constant motion section in the web path and various attachments to the basic machine may be positioned to operate on the web between these two rollers.
  • rollers 19 and 20 are shown schematically and it will be appreciated that the space between them can be suitably extended and arranged to accommodate various attachments.
  • attachments which are known per se, are items such as a sheet gussetter for forming gussets in the bags, a lip folder for folding lips in the web to form lips in bags eventually formed from the web, slit sealers to divide the web up into a series of tubes, trimming devices' and devices for rewinding material trimmed from the web, and a perforator for perforating the web longitudinally so that various types of perforations may be finished in the finished bags.
  • the micro-processor 40 may be provided with suitable outputs, and the programming of the micro-processor -may be arranged so that such attachments may be controlled to perform their various functions as required.
  • the micro-processor 40 is further programmed and arranged to supply the draw roller stepping motor 27 with a series of pulses of electrical current so that it is driven to drive the draw rollers 25 and 26 thus to index the web through the hot knife station 28.
  • the arrangement is such that the motor 27 is driven in a number of steps equivalent to the length 'of the pitches required between the operations of the hot knife 'station, these pitches being equivalent to the axial dimension of.the bags that are required to be formed.
  • the length of a bag is controlled by a settable input to the micro-processor which may determine in accordance with the programme for the processor the number of steps that the motor 27 moves through in each cycle of operation of the machine.
  • a photo-electric detector device 43 is provided above the web at a position upstream of the draw rollers 25 and 26 and arranged to provide an electric signal to the micro-processor 40 'on the passage of a predetermined part of the material on the web.
  • Means is provided to set into the micro-processor appropriate data so that it can supply the stepping motor 27 with the appropriate number of pulses to bring the web into correct register having regard to the printed material with the hot knife section on initial operation of the machine, whereafter correct indexing of the web in each cycle of the machine can be continued by the micro-processor.
  • the hot knife station comprises a knife blade 44 which is arranged in known manner per-se to be heated electrically and raised and lowered by means of a linkage connected to an eccentric mechanism 45 which in turn is driven by a stepping motor 47.
  • the stepping motor 47 is provided with pulses of electric current at an appropriate point in the machine cycle by the micro-processor 40 in accordance with its programming so-that the motor,47 causes the knife 44 to be lowered to engage the web and seal it in a fashion known per se to form bags in the web material, and to cut the web to separate the bags again in known . manner per se.
  • Sensing devices 48 and 49 are provided to indicate to the micro-processor when the hot knife 44 is raised and lowered respectively.
  • a sealing pressure roller 50 is provided immediately below the hot knife 44 to support the web while it is sealed by the hot knife.
  • the sealing roller 50 is driven by means of an electric stepping motor 51 which is supplied with pulses of electric current by the micro-processor in a manner discussed below.
  • downstream of the hot knife section conveyor system 29 is arranged to take a finished bag away from the hot knife section. This is driven at an appropriate rate and in sequence with the operation of the machine by the micro-processor 40 supplying pulses of electric current to the stepping motor 31 provided to drive the conveyor.
  • the sealing roller 50 is driven at an appropriate point in the cycle of the machine, that is to say after the operation of the knife '40, by the supply of electric pulses to it from the micro-processor 40 to advance the leading edge of the web formed by the cutting operation of the knife 44 onto the conveyor system 29.
  • a pick off arm device 52 having a roller 53 at the end of a pivotally mounted arm is arranged above the conveyor 29 and is movable to nip the trailing edge of a bag (or bags) as it approaches the 'conveyor 29, by means of a linkage 54 driven by an eccentric mechanism 55 and.an electric stepping motor 46. Lowering of the arm 52 by the motor 46 also under control of the micro-processor 40, causes the bag (or bags) to be engaged by the conveyor 29 and thus drawn away from the hot .knife section at the appropriate point in the machine cycle as the web is advanced by the draw rollers 25 and 26 during the indexing out of a fresh bag length of the web 14.
  • a stacking wheel assembly Downstream of the conveyor 29 is a stacking wheel assembly indicated generally at 60.
  • This assembly comprises two rolls 61 and 62 which are driven from the motor 31 and which are arranged to intermesh so as to corrugate a web passing through the nip between them.
  • the purpose of these rolls is to temporarily form corrugations along the length of the bags leaving the conveyor 29 to give them temporary longitudinal stiffness so that they can be readily shot from the end of the conveyor 29 onto the indexing conveyor system 32 to rest against a stacking gate indicated at 63.
  • a bag retarder unit 62 is provided between the stacking wheel assembly 60 and the conveyor 32.
  • the unit 64 comprises a pair of grippers 65 and 66 and mechanism not shown in detail is provided to be driven through an eccentric or cam mechanism by an electric stepping motor 69, so that the grippers are brought together to catch the tail end of a bag leaving the stacking wheel assembly to retard it so that it lies flat in the stack against the stacking gate 63.
  • the operation of the bag retarder unit is initiated in correct sequence in the operation cycle of the machine by the micro-processor 40.
  • the micro-processor provides an electrical signal to initiate the raising of the stacking gate 63 by suitable means of known design per se, and supplies pulses of electrical current to the stepping motor 33 to drive the conveyor 32 to carry the stack beyond the stacking gate.
  • the stacking gate 63 is then lowered ready to form a fresh stack of bags while the previous stack is carried to the end of the conveyor 32.
  • Various types of units for treating a stack of bags in a known manner per se may be provided at various positions on the conveyor 32. Typical of these are a hotrod sealing unit indicated at 67 which under control from the micro-processor 40 may pierce a stack of bags with hot rods to seal them together, thus to retain them in a stack.
  • a further typical such unit is that indicated at 68 in the form of a block sealing unit for sealing a block of bags in known manner per again under the control of the micro-processor 40.
  • a photo-electric device 71 is provided over the conveyor 29 upstream of the stacking wheel assembly and arranged to give-an electrical signal to the micro-processor 40 on the passage of the rear edge of a bag from the conveyor 29. This signal is used to initiate the operation of the bag retarder unit 64 by the micro-processor 40.
  • detectors 43 and 69 may be adjusted over their respective conveyors to suit particular bag configurations.
  • a second reel of web may be provided as indicated at 10' in trunnions 12'.
  • Sensors indicated at 70 and 70' may be provided to give an electrical signal to the micro-processor 40 when the reel of web 10 or 10' reaches a given minimum diameter indicating that the web is virtually consumed.
  • the various feed rates and feed distances of the web through the machine may be controlled by the programming of the micro-processor 40.
  • the processor can be provided with various settable inputs so that these parameters of the machine operation may be simply set without further mechanical adjustment of the machine.. This provides for extreme versatility in operation and ease of setting of the machine from making one size and type of bag to another.
  • micro-processor 40 By use of the micro-processor 40, not only is versatility of setting achieved,.but a great deal of electrical control equipment which would otherwise be needed for processing the machine and sequencing the various operations may be eliminated.
  • the stepping motor drives are preferably fed with pulses in such a manner so that the acceleration and deceleration pattern of the web 14 follows a simple harmonic type of motion. This is the preferred wave form for the motion since it minimises the stress in the web for high speed operation and thus enables the highest feed rates to be achieved.
EP80302368A 1979-07-11 1980-07-11 Systèmes d'entraînement de machine Withdrawn EP0023117A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7924100 1979-07-11
GB7924100 1979-07-11

Publications (1)

Publication Number Publication Date
EP0023117A1 true EP0023117A1 (fr) 1981-01-28

Family

ID=10506430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80302368A Withdrawn EP0023117A1 (fr) 1979-07-11 1980-07-11 Systèmes d'entraînement de machine

Country Status (2)

Country Link
EP (1) EP0023117A1 (fr)
GB (1) GB2059630A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2004651A1 (en) * 1968-03-25 1969-11-28 Pfizer (A) Cmpds. of general formula (I): R = NH2, omega-carboxy- (1-6C) alkylamino, omega-aminocarboxy (1-6C) alkylamino, omega-carbonamido-(1-6C) alkylamino,
GB2192603A (en) * 1986-06-13 1988-01-20 Fuji Machinery Co Intermittent web feeding apparatus
EP0297434A1 (fr) * 1987-06-29 1989-01-04 WindmÀ¶ller & Hölscher Procédé pour commander des machines à fabriquer des sacs ou des sachets
DE3937069A1 (de) * 1988-11-07 1990-05-10 Fmc Corp Steuersystem zum ausgleich von vorschubabweichungen in beiden richtungen bei taktgefoerderten materialbahnen
FR2638676A1 (fr) * 1988-11-10 1990-05-11 Fmc Corp Machines a fabriquer des sacs
FR2638677A1 (fr) * 1988-11-10 1990-05-11 Fmc Corp Procedes pour augmenter la production de machines a fabriquer des sacs
DE3937508A1 (de) * 1988-11-14 1990-05-17 Fmc Corp Servogetriebene zugrolle fuer eine beutelherstellmaschine
DE3900503A1 (de) * 1989-01-10 1990-07-12 Lehmacher & Sohn Masch Verfahren zur herstellung und zum stapeln von kunststoffbeuteln
DE3922236A1 (de) * 1989-07-06 1991-01-17 Lehmacher & Sohn Masch Vorrichtung zur herstellung von spitztueten aus einer doppellagigen kunststoffolienbahn
EP0419813A1 (fr) * 1989-09-25 1991-04-03 WindmÀ¶ller & Hölscher Dispositif de contrôle de machines pour la fabrication des sacs
US5230688A (en) * 1988-11-14 1993-07-27 Fmc Corporation Servo driven components of a bag machine
EP3385203A1 (fr) 2017-04-07 2018-10-10 Mespack, S.L. Dispositif de compensation de mouvement de bande pelliculaire pour une compensation de mouvement de bande pelliculaire entre une section de mouvement vers l'avant continu et une section de mouvement vers l'avant intermittent

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1136172B (it) * 1980-04-09 1986-08-27 Cir Spa Divisione Sasib Dispositivo a regolazione elettronica per il taglio progressivo in foglietti di una bobina di nastro di materilae in foglio anche stampato
DE3020009A1 (de) * 1980-05-24 1981-12-03 Hans 5216 Niederkassel Lehmacher Vorrichtung fuer die herstellung von beuteln aus einer kunststoffolien-schlauchbahn
US4499920A (en) * 1982-05-17 1985-02-19 Owens-Illinois, Inc. Apparatus for controlling a valve
CH650722A5 (fr) * 1983-02-21 1985-08-15 Bobst Sa Machine pour confectionner des boites pliantes.
SE452131B (sv) * 1986-11-05 1987-11-16 Fas Converting Machinery Ab Anordning vid pasmaskin for bildande av pasavgrensande perforeringslinjer och svetslinjer
US5338281A (en) * 1993-03-18 1994-08-16 Ro-An Industries Corporation Wicket servo method and device in a bag making machine
GB9404416D0 (en) * 1994-03-08 1994-04-20 Turner Intellect Property Ltd Device for finding concealed studs

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1942410A1 (de) * 1968-09-16 1970-03-26 Fmc Corp Maschine zum Fertigen von Beuteln
DE2305719A1 (de) * 1972-03-30 1973-10-11 Fmc Corp Vorrichtung zur bearbeitung von bahnmaterialien
DE2527655A1 (de) * 1974-06-21 1976-01-15 Packaging Ind Inc Vorrichtung zur handhabung von materialbahnen
US4006395A (en) * 1974-10-31 1977-02-01 Eastman Kodak Company Apparatus for the control of photosensitive material handling and cutting operations in computer output microfilmers
US4061260A (en) * 1976-03-29 1977-12-06 Copp Robert M Bag making machine
DE2746770A1 (de) * 1976-10-21 1978-04-27 Fmc Corp Maschine zum herstellen von beuteln aus thermoplastischem material
DE2838375A1 (de) * 1977-09-07 1979-03-08 Sapal Plieuses Automatiques Einwickelmaschine
GB2005593A (en) * 1977-09-30 1979-04-25 Windmoeller & Hoelscher Apparatus for making carrier bags from two half-tubes running side-by-side
US4156170A (en) * 1977-09-29 1979-05-22 Pako Corporation Stepper motor control

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1942410A1 (de) * 1968-09-16 1970-03-26 Fmc Corp Maschine zum Fertigen von Beuteln
DE2305719A1 (de) * 1972-03-30 1973-10-11 Fmc Corp Vorrichtung zur bearbeitung von bahnmaterialien
DE2527655A1 (de) * 1974-06-21 1976-01-15 Packaging Ind Inc Vorrichtung zur handhabung von materialbahnen
US4006395A (en) * 1974-10-31 1977-02-01 Eastman Kodak Company Apparatus for the control of photosensitive material handling and cutting operations in computer output microfilmers
US4061260A (en) * 1976-03-29 1977-12-06 Copp Robert M Bag making machine
DE2746770A1 (de) * 1976-10-21 1978-04-27 Fmc Corp Maschine zum herstellen von beuteln aus thermoplastischem material
DE2838375A1 (de) * 1977-09-07 1979-03-08 Sapal Plieuses Automatiques Einwickelmaschine
US4156170A (en) * 1977-09-29 1979-05-22 Pako Corporation Stepper motor control
GB2005593A (en) * 1977-09-30 1979-04-25 Windmoeller & Hoelscher Apparatus for making carrier bags from two half-tubes running side-by-side

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2004651A1 (en) * 1968-03-25 1969-11-28 Pfizer (A) Cmpds. of general formula (I): R = NH2, omega-carboxy- (1-6C) alkylamino, omega-aminocarboxy (1-6C) alkylamino, omega-carbonamido-(1-6C) alkylamino,
GB2192603A (en) * 1986-06-13 1988-01-20 Fuji Machinery Co Intermittent web feeding apparatus
GB2192603B (en) * 1986-06-13 1989-12-13 Fuji Machinery Co Intermittent web feeding apparatus
EP0297434A1 (fr) * 1987-06-29 1989-01-04 WindmÀ¶ller & Hölscher Procédé pour commander des machines à fabriquer des sacs ou des sachets
US5002522A (en) * 1987-06-29 1991-03-26 Windmoller & Holscher Apparatus for controlling machines for making bags or sacks
DE3937069A1 (de) * 1988-11-07 1990-05-10 Fmc Corp Steuersystem zum ausgleich von vorschubabweichungen in beiden richtungen bei taktgefoerderten materialbahnen
DE3937069C2 (de) * 1988-11-07 2000-07-13 Fmc Corp Verfahren und Vorrichtung zum Ausgleich von Vorschubabweichungen in beiden Richtungen bei taktgeförderten Materialbahnen
BE1002988A5 (fr) * 1988-11-10 1991-10-15 Fmc Corp Machine a confectionner des sacs a servomoteur.
FR2638676A1 (fr) * 1988-11-10 1990-05-11 Fmc Corp Machines a fabriquer des sacs
FR2638677A1 (fr) * 1988-11-10 1990-05-11 Fmc Corp Procedes pour augmenter la production de machines a fabriquer des sacs
DE3937536A1 (de) * 1988-11-10 1990-05-17 Fmc Corp Beutelherstellmaschine
FR2696678A1 (fr) * 1988-11-10 1994-04-15 Fmc Corp Machine à fabriquer des sacs.
US5230688A (en) * 1988-11-14 1993-07-27 Fmc Corporation Servo driven components of a bag machine
BE1002989A5 (fr) * 1988-11-14 1991-10-15 Fmc Corp Rouleau de tirage entraine par servomoteur pour machine a confectionner des sacs.
DE3937508A1 (de) * 1988-11-14 1990-05-17 Fmc Corp Servogetriebene zugrolle fuer eine beutelherstellmaschine
DE3937508C2 (de) * 1988-11-14 2001-03-22 Fmc Corp Verfahren zum Betreiben einer Beutelherstellmaschine
DE3900503A1 (de) * 1989-01-10 1990-07-12 Lehmacher & Sohn Masch Verfahren zur herstellung und zum stapeln von kunststoffbeuteln
DE3922236A1 (de) * 1989-07-06 1991-01-17 Lehmacher & Sohn Masch Vorrichtung zur herstellung von spitztueten aus einer doppellagigen kunststoffolienbahn
EP0419813A1 (fr) * 1989-09-25 1991-04-03 WindmÀ¶ller & Hölscher Dispositif de contrôle de machines pour la fabrication des sacs
EP3385203A1 (fr) 2017-04-07 2018-10-10 Mespack, S.L. Dispositif de compensation de mouvement de bande pelliculaire pour une compensation de mouvement de bande pelliculaire entre une section de mouvement vers l'avant continu et une section de mouvement vers l'avant intermittent
WO2018185141A1 (fr) 2017-04-07 2018-10-11 Mespack, Sl Dispositif de compensation de mouvement de film en bande pour une compensation de mouvement de film en bande entre une section de mouvement avant continue et une section de mouvement avant intermittente

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Publication number Publication date
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Inventor name: BURKE, DAVID WILLIAM