EP0622301A1 - Appareil d'évacuation - Google Patents

Appareil d'évacuation Download PDF

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Publication number
EP0622301A1
EP0622301A1 EP94104358A EP94104358A EP0622301A1 EP 0622301 A1 EP0622301 A1 EP 0622301A1 EP 94104358 A EP94104358 A EP 94104358A EP 94104358 A EP94104358 A EP 94104358A EP 0622301 A1 EP0622301 A1 EP 0622301A1
Authority
EP
European Patent Office
Prior art keywords
pressure
chamber
vacuum
valve
pressure level
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
EP94104358A
Other languages
German (de)
English (en)
Other versions
EP0622301B1 (fr
Inventor
Rudolf Christoph Bilz
Felix Rudolf Bilz
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.)
BILZ, MARITA EN BILZ, FELIX RUDOLF
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0622301A1 publication Critical patent/EP0622301A1/fr
Application granted granted Critical
Publication of EP0622301B1 publication Critical patent/EP0622301B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/022—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas the chambers moving in an endless path

Definitions

  • the invention relates to an evacuation device, the chambers of which can be connected in succession to a plurality of vacuum sources graded in pressure for evacuation to a predetermined pressure level through connecting lines, the connection being made by a valve control assigned to the connecting lines.
  • a chamber is filled with the goods wrapped in a film or a film bag. After loading the chamber, it is closed. Subsequently the chamber is moved further and a connection of the chamber which has just been closed to a chamber which is still closed but is on the way to the removal station is connected via a rotary valve in order to equalize the pressure, so that the pressure level of the chamber which has just been closed is lower than the atmospheric pressure Pressure value is lowered. This saves energy, since in the next stages less power is required to lower the pressure level to the predetermined pressure level.
  • the chamber has not been closed tightly, for example because parts of the goods to be packaged under vacuum or their wrapping have got between the lid and the chamber or there is a mechanical defect on the chamber lid, this is not proper packaging more is possible.
  • DE 37 36 375 C1 describes a device for checking the tightness of an autoclave evacuated to a predetermined pressure, which has a pressure switch and a control device.
  • the invention has for its object to provide an evacuation device based on the prior art, in which a pressure increase in the graduated vacuum sources is prevented when leakages occur.
  • valve control is a valve upstream of the chamber (s), which connects the chambers with one of the Connecting lines or another evacuation device, wherein switching valves are arranged in the connecting lines between the connection to the valve and the vacuum sources, that between the first switching valve of the connecting line, which leads to the vacuum source with the highest pressure level, and the connection to the valve, a first Pressure switch is provided that the first pressure switch causes the opening of the first switching valve when a certain first pressure level is reached and, if the further switching valves are not reached, causes the second pressure switch to open the first switching valve and reach a second predetermined pressure level which is below the first pressure level , responds and causes the closing of the first switching valve and that the further evacuation device serves to evacuate the chamber to the further pressure level at which the first pressure switch responds.
  • the pressure level at which the first pressure switch responds corresponds to a pressure level that is above the pressure level that is established in the chamber when connected to the further evacuation device, but below the atmospheric pressure.
  • the further evacuation device is represented by the vacuum of an already evacuated chamber which can be connected to the chamber to be evacuated by the valve.
  • a compensation reservoir is arranged between the valve and the first switching valve is, which in the case that in the chamber which is connected to the chamber to be evacuated by the valve, there should be no vacuum and a vacuum which is too low for the pressure exchange, can be connected to the chamber to be evacuated for pressure exchange to the response pressure of the first pressure switch is.
  • the advantage of this design is that a vacuum reservoir is built up via the equalization reservoir, which, when a chamber that could not be evacuated due to leakage, takes on the penultimate station in which a pressure exchange with a just filled and closed chamber is to take place , the pressure level is reduced so that the first pressure switch responds and the switching valve opens.
  • the volume of the equalization reservoir is dimensioned such that even if there is no vacuum in the chamber in the ventilation station for the cross vacuum, the first pressure switch is activated.
  • the pressure switches are preferably connected to the compensation reservoir.
  • a particularly favorable arrangement results if there are two vacuum sources graded in pressure, which can be connected to the chambers via the valve, the first vacuum source having a higher pressure level than the second vacuum source and the pressure switches and the first switching valve associated with the first vacuum source are.
  • the further switching valves are caused to delay the transfer to the closed position via the first pressure switch if the measured pressure level is above that of the first pressure level and which for the cycle of connecting a subsequent chamber in which a Pressure level below the first pressure level is present, opening is delayed.
  • the device described above is particularly suitable for use in a packaging machine, in particular a rotary machine, with at least two chambers, which are fed in succession to different stations, of which the first station is the loading station and the last station is the ventilation and removal station, the chambers after leaving the insertion station can be connected in succession to the vacuum sources graded in pressure for evacuation in order to ensure that this can be connected to a vacuum center.
  • the proposed device ensures that a distinction is made as to whether a chamber has not received a cross vacuum because it is leaking or because its communicating chamber was not evacuated.
  • a chamber without a cross vacuum, but which is sealed is immediately lowered below the response value of the first pressure switch by the compensation reservoir, so that evacuation takes place.
  • the compensation reservoir is evacuated to the reference value via the cross vacuum the next time it is connected to a chamber. If two successive chambers leak, which is rarely the case, the control unit opens the valve briefly to create a vacuum in the compensation reservoir.
  • a machine 1 with two chambers 2, 2 a can be seen from the attached drawing figure, the machine 1 being designed as a rotary machine, and for the sake of simplicity, the chambers 2, 2 a are shown as being movable from the left narrow side to the right.
  • a connection to two connecting lines 3, 4 is provided for evacuation, the connecting line 3 being connected to a first vacuum source 5 and the connecting line 4 being connected to a second vacuum source 6.
  • the pressure level in the first vacuum source 5 is, for example, 60 mbar and in the second vacuum source 6, for example, 2 mbar.
  • the machine 1 is arranged in the room 7.
  • the first and second vacuum sources 5, 6 are part of a vacuum center 10, which is accommodated in the second room 8 separated from the first room 7 via the wall 9 or at any distance.
  • the line network of the vacuum center 10 forms the reservoirs of the vacuum sources 5, 6.
  • the connection to the respective chamber 2, 2 a takes place via a valve 13, 13 a, which in the case of a rotary machine is designed, for example, as a rotary valve and ensures that switching states can be reached in which two successive chambers 2, 2 a or spaced apart on the circumference Chambers are connected to each other for pressure equalization.
  • the valve 13 which is designed as a rotary valve, has, for example, distributed on the circumference, various connections which connect the chambers 2, 2 a which are connected to them one after the other, for example with the connecting lines 3, 4 to the vacuum sources 5, 6 or the chambers 2 Connect 2a to each other for pressure exchange.
  • a vacuum compensation reservoir 16 is arranged upstream of the rotary valve 13, which is separated from the vacuum source 5 by a switching valve 14 in the connecting line 3.
  • a connecting line 17 is connected to the equalizing reservoir 16, to which a first pressure switch 18 and a second pressure switch 19 are assigned.
  • the pressure switch 18 is set to a first pressure level pA, while the second pressure switch responds to a pressure level pB which is below the pressure level of the first pressure switch 18.
  • the pressure switches 18, 19 are connected to a switching unit 20 which is connected to the first switching valve 14 via a line.
  • a second switching valve 15 is arranged in the connecting line 4 to the second vacuum source 6, which represents the fine vacuum and represents the pressure level to be achieved.
  • This second switching valve 15 is also connected to the switching unit 20 via a control line. After the chamber 2 has been filled with the goods to be packed and closed and has left the loading station, it is moved into a position in which it experiences a connection with the leading second chamber 2a via the valve 13a, so that a pressure exchange between the two Cross-vacuum) takes place since the chamber 2a is still in the evacuated state. In the next and thus last station, however, this chamber 2a is vented to atmospheric pressure in order to be able to remove the packaged goods. The vacuum in chamber 2a is used to bring chamber 2, which is still to be evacuated, to a lower pressure value than atmospheric pressure.
  • the chamber 2 is then connected via the valve 13 to the vacuum source 5, but this requires that it is determined via the first pressure switch 18 that a lowering to a first pressure stage of the chamber evacuated via cross-vacuum has occurred, at which the response pressure of the first pressure switch 18 is undershot. It takes place via the connection to the control unit 20 and from this via the control line to the first switching valve 14 causes the switching valve 14 to open, so that the chamber is connected to the first vacuum source 5 via the connecting line 3. There is also a rapid reduction in the pressure level in the chamber to the pressure level of the vacuum source 5 because it has a much larger volume than a chamber of the machine 1. If a reduction to the desired value is achieved, the closing of the first switching valve 14 is initiated via the pressure switch 19 and the control unit 20.
  • the second switching valve 15 is in the open position. It is only moved to a closed position via the control unit 20 if, before connecting a chamber via the valve 13 to the second vacuum source 6, it has been determined that the pressure level of the pressure switch 18 has not been reached and therefore the first switching valve 14 has not been opened. In this case, the second switching valve 15 is closed via the control unit 20, so that there is also no risk of a connection between an unclosed chamber and the fine vacuum, which is represented by the second vacuum source 6, which can result in an increase in pressure in the reservoir the second vacuum source 6 would result.
  • the volume of the compensation reservoir 16 is not sufficient to lower the pressure below the response value pa of the first pressure switch 18.
  • the switching valve 14 remains closed in this case.
  • the second switching valve is closed with a time delay. This ensures overall that a connection to the two vacuum sources 5, 6 of the vacuum control center is only established when it is actually possible to evacuate the chambers to the desired pressure level.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vacuum Packaging (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP94104358A 1993-04-29 1994-03-19 Appareil d'évacuation Expired - Lifetime EP0622301B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4314052 1993-04-29
DE4314052A DE4314052C1 (de) 1993-04-29 1993-04-29 Evakuiereinrichtung

Publications (2)

Publication Number Publication Date
EP0622301A1 true EP0622301A1 (fr) 1994-11-02
EP0622301B1 EP0622301B1 (fr) 1996-12-11

Family

ID=6486687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94104358A Expired - Lifetime EP0622301B1 (fr) 1993-04-29 1994-03-19 Appareil d'évacuation

Country Status (4)

Country Link
EP (1) EP0622301B1 (fr)
AT (1) ATE146144T1 (fr)
DE (2) DE4314052C1 (fr)
DK (1) DK0622301T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1595794A1 (fr) * 2004-05-14 2005-11-16 Felix Rudolf Bilz Procédé et dispositif d'évacuation d'une chambre
WO2014173802A1 (fr) * 2013-04-24 2014-10-30 Gea Food Solutions Germany Gmbh Soupape intégrée dans un outil pour vide primaire et/ou poussé
EP2987604A1 (fr) * 2014-08-20 2016-02-24 Krones AG Dispositif et procédé de recyclage à vide dans une installation de traitement de récipient

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19500692C2 (de) * 1995-01-12 1998-09-10 Felix Rudolf Bilz Anlage zur Druckabsenkung in den Arbeitskammern mehrerer an eine Vakuumzentralanlage angeschlossener Verbraucher
DE19909995A1 (de) * 1999-03-06 2000-09-07 Inova Pac Systeme Gmbh Verfahren und Vorrichtung zum Befüllen und/oder Evakuieren von Behältern

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2169165A1 (en) * 1972-01-25 1973-09-07 Vacuum Pump Spa Rotary vacuum heat sealing press - for plastic containers with vacuum distributor group,heat sealing units,time switch,and prog
US4480425A (en) * 1981-01-16 1984-11-06 Kabushiki Kaisha Furukawa Seisakusho Vacuum packaging apparatus
FR2560857A1 (fr) * 1984-03-07 1985-09-13 Sig Schweiz Industrieges Dispositif pour la mise sous vide et la fermeture de sachets remplis
EP0272736A1 (fr) * 1986-12-12 1988-06-29 Calumatic B.V. Dispositif pour réduire la quantité d'oxygène présente au-dessus du niveau de remplissage dans un récipient

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829889A1 (de) * 1978-07-07 1980-01-24 Leybold Heraeus Gmbh & Co Kg Verfahren und vorrichtung zur wiederholten evakuierung abgeschlossener volumina
JPS62182014A (ja) * 1986-01-30 1987-08-10 株式会社　古川製作所 真空包装装置
DE3736375C1 (en) * 1987-10-27 1989-02-02 Muenchner Medizin Mechanik Method of checking a gas steriliser for leaks and gas steriliser for performing the method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2169165A1 (en) * 1972-01-25 1973-09-07 Vacuum Pump Spa Rotary vacuum heat sealing press - for plastic containers with vacuum distributor group,heat sealing units,time switch,and prog
US4480425A (en) * 1981-01-16 1984-11-06 Kabushiki Kaisha Furukawa Seisakusho Vacuum packaging apparatus
FR2560857A1 (fr) * 1984-03-07 1985-09-13 Sig Schweiz Industrieges Dispositif pour la mise sous vide et la fermeture de sachets remplis
EP0272736A1 (fr) * 1986-12-12 1988-06-29 Calumatic B.V. Dispositif pour réduire la quantité d'oxygène présente au-dessus du niveau de remplissage dans un récipient

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1595794A1 (fr) * 2004-05-14 2005-11-16 Felix Rudolf Bilz Procédé et dispositif d'évacuation d'une chambre
WO2014173802A1 (fr) * 2013-04-24 2014-10-30 Gea Food Solutions Germany Gmbh Soupape intégrée dans un outil pour vide primaire et/ou poussé
RU2661383C2 (ru) * 2013-04-24 2018-07-16 Геа Фуд Сольюшнс Джемени Гмбх Упаковочная машина, содержащая встроенный в инструмент клапан для низкого и/или среднего вакуума
EP3459866A3 (fr) * 2013-04-24 2019-06-26 GEA Food Solutions Germany GmbH Procédé pour faire le vide dans une chambre
EP2987604A1 (fr) * 2014-08-20 2016-02-24 Krones AG Dispositif et procédé de recyclage à vide dans une installation de traitement de récipient

Also Published As

Publication number Publication date
ATE146144T1 (de) 1996-12-15
DE59401229D1 (de) 1997-01-23
DK0622301T3 (da) 1997-06-16
DE4314052C1 (de) 1994-11-10
EP0622301B1 (fr) 1996-12-11

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