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EP1020390A2 - Zuführkalander in Schweissmaschinen für plastisches Material - Google Patents

Zuführkalander in Schweissmaschinen für plastisches Material Download PDF

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Publication number
EP1020390A2
EP1020390A2 EP99204427A EP99204427A EP1020390A2 EP 1020390 A2 EP1020390 A2 EP 1020390A2 EP 99204427 A EP99204427 A EP 99204427A EP 99204427 A EP99204427 A EP 99204427A EP 1020390 A2 EP1020390 A2 EP 1020390A2
Authority
EP
European Patent Office
Prior art keywords
cylinders
feeding
welding
calender
motors
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Withdrawn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
EP99204427A
Other languages
English (en)
French (fr)
Other versions
EP1020390A3 (de
Inventor
Giorgio Mainini
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.)
Elba SpA
Original Assignee
Elba SpA
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 Elba SpA filed Critical Elba SpA
Publication of EP1020390A2 publication Critical patent/EP1020390A2/de
Publication of EP1020390A3 publication Critical patent/EP1020390A3/de
Withdrawn legal-status Critical Current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
    • 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 refers to an instantaneously controlled feeding calender in welding machines for plastic materials.
  • the plastic material is fed in a forward motion by at least a pair of superimposed rollers or cylinders, known as calenders.
  • the two main rollers forming the feeding calender leading to a downstream welding unit are presently controlled in two different ways.
  • one of the rollers is controlled by a kinematic device and a mechanical transmission, linked in turn to a central drive unit and to the welding unit, in addition to the second roller.
  • one of the rollers is simply and directly actuated by a motor controlled by and electronically linked to the welding unit, and the other roller is phase-connected to the first by gears or some other form of transmission.
  • blowing elements such as air jets have been fitted downstream of these feeding units, so as to encompass the plastic material from both an upper and a lower side and promote its proper forward motion in an essentially planar manner.
  • the purpose of this invention is to produce a feeding calender in welding machines for plastic materials capable of overcoming the mentioned technical problems, by eliminating any out of phase feeding and improper forward motion with respect to the welding and stacking units of the welding machine.
  • this purpose is achieved by producing an instantaneously controlled feeding calender in welding machines for plastic materials, according to the principles outlined in claim 1.
  • a calender according to this invention has thus made it possible to achieve a practical embodiment with the utmost simplicity, as it can be attained by using elements of a simple construction and assembly, even available on the open market.
  • Such a calender can also be easily adapted to any type of application.
  • the feeding calender 11 comprises an upper cylinder 12 and a lower cylinder 13, superimposed on each other and mounted on parallel axles, between which a plastic or thermoplastic film (14) is fed so as to form a bag or similar.
  • the film 14 may be fed from a roll, not shown here, of a continuous tubular plastic material.
  • the cylinders 12 and 13 are associated with air feeding nozzles 10 capable of favoring the maintenance in a flat plane of the filmy material 14 fed by and passing through the interior of the cylinders 12 and 13.
  • a welding unit is positioned downstream of the two cylinders 12 and 13, comprising an upper welding arm 15 and a lower welding arm 16.
  • These two welding arms 15 and 16, which are for instance both moved in an alternating manner by a known cinematic device not shown here, are working together to perform the transversal welding operation of the tubular material and provide a cutting blade 17 which acts between the two welding lines set up by the welding arms when engaging with each other.
  • An area for collecting the finished bags shown in a simplified manner by the number 19, is provided downstream of the welding units.
  • this collecting area is formed by a supporting element 18 designed to stack these bags 19, after being welded and expelled from the two welding arms 15 and 16.
  • the supporting element 18 is equipped with a few needles 20 (only one of which shown) on which the bags 19 are permanently positioned by using a pressing element 21 provided in the upper part. It can be seen that the bags 19 are stretched out on a subsequent table or similar supporting element 22.
  • the figures 1-3 show how according to this invention the two cylinders 12 and 13 are each supported on terminal cushions 23, inserted and fastened to the shoulders 24 of the welding machine.
  • Each of the motors 27 and 28 is directly coupled by a corresponding coupling 29 to the corresponding upper cylinder 12 and lower cylinder 13.
  • the two motors 27 and 28 are connected to an electronic control panel, shown in a simplified manner by the number 30, which performs and coordinates the movement depending on the feeding requirements.
  • the motors 27 and 28 may for example be of a "brushless" type, of a alternate current vectorial inverter type, of a direct current or other type.
  • the electronic control panel 30 may therefore actuate the two motors 27 and 28 in a perfectly phased and coordinated or in a pre-established out-of-phase manner.
  • the second type makes it possible to achieve a correction of the feeding motion of the film 14.
  • Such a feeding system which can also adjusted based on a possibly separate and independent control of the two cylinders, also proves advantageous in the event of producing a bag of particular length, made of a particular plastic or thermoplastic material, at a high feeding speed.
  • this figure in fact shows that the motors 27 and 28 are placed on shafts parallel to those of the two cylinders 12 and 13 to which they are connected by an interposed transmission, as shown in a simplified manner by the numbers 31 and 32.

Landscapes

  • Lining Or Joining Of Plastics Or The Like (AREA)
EP99204427A 1999-01-12 1999-12-20 Zuführkalander in Schweissmaschinen für plastisches Material Withdrawn EP1020390A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI990031 1999-01-12
IT1999MI000031A IT1306936B1 (it) 1999-01-12 1999-01-12 Calandra di alimentazione a controllo istantaneo in macchine disaldatura per materiali plastici

Publications (2)

Publication Number Publication Date
EP1020390A2 true EP1020390A2 (de) 2000-07-19
EP1020390A3 EP1020390A3 (de) 2001-12-19

Family

ID=11381445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99204427A Withdrawn EP1020390A3 (de) 1999-01-12 1999-12-20 Zuführkalander in Schweissmaschinen für plastisches Material

Country Status (2)

Country Link
EP (1) EP1020390A3 (de)
IT (1) IT1306936B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITCZ20090023A1 (it) * 2009-11-02 2011-05-03 Prati Srl Dispositivo di traino a rulli motorizzati per bande sovrapposte

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971416A (en) * 1954-12-31 1961-02-14 Lectromatic Devices Inc Measuring-type strip-feeding machine
US3902954A (en) * 1971-11-12 1975-09-02 Fmc Corp Apparatus for making bottom seal thermoplastic bags
DE3138540A1 (de) * 1981-09-28 1983-04-14 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum zufuehren von auf einem anlegertisch vereinzelten und nach vorder- und seitenkante ausgerichteten bogen
US5358592A (en) * 1989-07-11 1994-10-25 Nippon Flute Co., Ltd. Bag making machine control
EP0759358A2 (de) * 1995-08-22 1997-02-26 Fmc Corporation Korrektur von taktgeförderten registergenauen Materialbahnen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971416A (en) * 1954-12-31 1961-02-14 Lectromatic Devices Inc Measuring-type strip-feeding machine
US3902954A (en) * 1971-11-12 1975-09-02 Fmc Corp Apparatus for making bottom seal thermoplastic bags
DE3138540A1 (de) * 1981-09-28 1983-04-14 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum zufuehren von auf einem anlegertisch vereinzelten und nach vorder- und seitenkante ausgerichteten bogen
US5358592A (en) * 1989-07-11 1994-10-25 Nippon Flute Co., Ltd. Bag making machine control
EP0759358A2 (de) * 1995-08-22 1997-02-26 Fmc Corporation Korrektur von taktgeförderten registergenauen Materialbahnen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITCZ20090023A1 (it) * 2009-11-02 2011-05-03 Prati Srl Dispositivo di traino a rulli motorizzati per bande sovrapposte
WO2011051485A1 (en) * 2009-11-02 2011-05-05 Prati S.R.L. Feeding device with motorized rollers for overlying bands of paper or other materials

Also Published As

Publication number Publication date
ITMI990031A1 (it) 2000-07-12
IT1306936B1 (it) 2001-10-11
EP1020390A3 (de) 2001-12-19

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