EP0092265A2 - Entlüftungsvorrichtung für automatische Sackfüllmaschinen für pulverförmige Materialien - Google Patents

Entlüftungsvorrichtung für automatische Sackfüllmaschinen für pulverförmige Materialien Download PDF

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Publication number
EP0092265A2
EP0092265A2 EP83200458A EP83200458A EP0092265A2 EP 0092265 A2 EP0092265 A2 EP 0092265A2 EP 83200458 A EP83200458 A EP 83200458A EP 83200458 A EP83200458 A EP 83200458A EP 0092265 A2 EP0092265 A2 EP 0092265A2
Authority
EP
European Patent Office
Prior art keywords
air
bag filling
bag
filtering
deaerator
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
EP83200458A
Other languages
English (en)
French (fr)
Other versions
EP0092265B1 (de
EP0092265A3 (en
Inventor
Mario Moltrasio
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.)
FLSmidth Ventomatic SpA
Original Assignee
Car Ventomatic 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 Car Ventomatic SpA filed Critical Car Ventomatic SpA
Priority to AT83200458T priority Critical patent/ATE28434T1/de
Publication of EP0092265A2 publication Critical patent/EP0092265A2/de
Publication of EP0092265A3 publication Critical patent/EP0092265A3/en
Application granted granted Critical
Publication of EP0092265B1 publication Critical patent/EP0092265B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
    • B65B39/04—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers having air-escape, or air-withdrawal, passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/04—Methods of, or means for, filling the material into the containers or receptacles
    • B65B1/18—Methods of, or means for, filling the material into the containers or receptacles for filling valve-bags

Definitions

  • the present invention relates to a deaerating device for removing air contained in particulate materials inside the automatic bag filling machines.
  • the known automatic bag filling machines for granular and/or powdery materials are of the static or rotary kind and generally consist of a hopper receiving the material to be bagged, fed to it by generally pneumatic known means, said hoppers being provided with a number of delivery nozzles, on which the bags to be filled are inserted, each nozzle being provided with feeding means connected with bag weighing and ejecting means, which stop material delivery and eject the bag when the latter reaches a predetermined weight, the filling operation being resumed only when another bag is inserted on the nozzle.
  • screw feeders where a screw arranged at the hopper bottom and partially inserted in the nozzle, causes material to advance in it
  • turbine feeders where a wheel provided with rotary blades pushes the material into the nozzle
  • belt feeders where the material advanced by a drum, is practically thrown into the nozzle by a conveyor belt partially wrapping said drum and moving at a speed equal to the surface speed of the drum.
  • a problem still to be solved and highly felt by the manufacturers of bag filling machines, is to remove the greatest possible amount of air enclosed in the material, during the bag filling operation, since said air at this point of the working cycle is no more required and on the contrary it has a harmful effect because with the bigger volume of material, it increases bag filling time and bag volume for the same weight, as the bag has to contain a certain volume of air in addition to the particulate material.
  • the present invention solves the problem of removing air contained in the material before the bag filling operation, and thorough tests and experiments showed that this system is reliable, and a considerable reduction of the bag filling time is obtained (so that it becomes a fraction of the time presently required for some materials such as hydrated lime) as well as an increase in bag capacity, so that it is possible either to use smaller bags or to increase the contents in the presently used bags.
  • the present invention consists in making the wall of the inlet area for the material in the nozzle, and a portion of the nozzle wall (according to the feeding system used, either a turbine feeder or a screw feeder) of a filtering material, through which air can be passed but not the product to be bagged, such as porous material, filtering wires and so forth, and making under said wall a chamber where vacuum or a pressurized air blow are alternately produced, said vacuum being produced during the bag filling operation, so as to remove enclosed air from the material flowing along said wall, and the pressurized air blow being produced during the stage of replacing on the nozzle a filled bag with an empty bag, in order to prevent that minute particles of material entered in the capillary air passages, in the long run clog the air filtering area.
  • reference numeral 1 is a hopper feeding a nozzle 2 of a bag filling machine of the kind fed through a screw feeder 3.
  • the lower wall of the hopper 1 and a portion 4 of the wall of nozzle 2 according to the present invention is made of an air permeable material, such as a porous blanket or baffle, a filtering wire or cloth and the like, suitably backed in case non rigid materials such as cloth and the like are being used.
  • the zone occupied by the material is closed to the outside by an impermeable wall 5 so as to form between them a chamber 6 to which is connected a pipe 7 which is divided into two lines 8 and 9, which can be shut off by valves 10 and 11.
  • Line 8 is connected to a vacuum source and line 9 to a source of pressurized air.
  • the system comprises hopper 21, nozzle 22, a vertically arranged turbine 23 actuated by a pulley 32 connected to a suitable motor (not shown), a permeable wall 24 closed to the outside by an impermeable wall 25 so as to form an intermediate chamber 26 to which a pipe 27 is connected, which is divided into two lines 28 and 29 which can be shut off by valves 30 and 31, of which line 28 is connected to a vacuum source and line 29 to a source of pressurized air.
  • valve 10 or 30 is open and in the chamber 6 or 26 vacuum is produced, so as to suck air contained in the material which is flowing on the permeable wall 4 or 24 to the nozzle mouth.
  • valve 10 or 30 When the bag is filled and the screw or turbine feeder is stopped, valve 10 or 30 is closed at the same time and valve 11 or 31 is opened for a very short time (fraction of a second), so as to give an air blow in the reverse direction to the filtering baffle and to clean it from the particles of material that during air suction could have clogged the ducts of passage of said air.
  • valve 10 or 30 When the filling operation is resumed, valve 10 or 30 is again opened and air contained in the material is again sucked.
  • the air blow is being given at each bag filling step.
  • this is not indispensable and since the frequence of such a counterflow cleaning operation of the filtering baffle mainly depends upon the kind of material to be handled, said cleaning operation may be effected also after a certain number of filling steps, or it may be suitably timed, or the counterflow pressurized air blow may be released only when a suitable known device detects that the filtering baffle reached a predetermined clogging degree, e.g. when the vacuum level in the chamber 5 or 25 goes beyond a fixed level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Vacuum Packaging (AREA)
  • Paper (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
EP83200458A 1982-04-16 1983-03-31 Entlüftungsvorrichtung für automatische Sackfüllmaschinen für pulverförmige Materialien Expired EP0092265B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83200458T ATE28434T1 (de) 1982-04-16 1983-03-31 Entlueftungsvorrichtung fuer automatische sackfuellmaschinen fuer pulverfoermige materialien.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2078982 1982-04-16
IT20789/82A IT1151883B (it) 1982-04-16 1982-04-16 Disareatore per insaccatrici automatiche di materiali pulvurulenti

Publications (3)

Publication Number Publication Date
EP0092265A2 true EP0092265A2 (de) 1983-10-26
EP0092265A3 EP0092265A3 (en) 1984-11-14
EP0092265B1 EP0092265B1 (de) 1987-07-22

Family

ID=11172089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200458A Expired EP0092265B1 (de) 1982-04-16 1983-03-31 Entlüftungsvorrichtung für automatische Sackfüllmaschinen für pulverförmige Materialien

Country Status (4)

Country Link
EP (1) EP0092265B1 (de)
AT (1) ATE28434T1 (de)
DE (1) DE3372602D1 (de)
IT (1) IT1151883B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208378A (en) * 1987-07-29 1989-03-30 Mitsubishi Chem Ind De-aerating particulate material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142156C2 (de) * 1991-12-20 1997-01-16 Haver & Boecker Füllmaschine zum Füllen von Ventilsäcken

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1011489A (en) * 1962-12-14 1965-12-01 Black Products Co A method and machine for filling bags
DE2717948A1 (de) * 1977-04-22 1978-10-26 Behn Verpackung Erwin Ventilsackfuellvorrichtung fuer flugfaehiges fuellgut und verfahren zum betreiben der vorrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1011489A (en) * 1962-12-14 1965-12-01 Black Products Co A method and machine for filling bags
DE2717948A1 (de) * 1977-04-22 1978-10-26 Behn Verpackung Erwin Ventilsackfuellvorrichtung fuer flugfaehiges fuellgut und verfahren zum betreiben der vorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208378A (en) * 1987-07-29 1989-03-30 Mitsubishi Chem Ind De-aerating particulate material
GB2208378B (en) * 1987-07-29 1991-11-27 Mitsubishi Chem Ind Deaerator for particulates

Also Published As

Publication number Publication date
EP0092265B1 (de) 1987-07-22
DE3372602D1 (en) 1987-08-27
IT1151883B (it) 1986-12-24
ATE28434T1 (de) 1987-08-15
EP0092265A3 (en) 1984-11-14
IT8220789A0 (it) 1982-04-16

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