EP4074610A1 - Procédé de remplissage d'un récipient au moins partiellement perméable au gaz - Google Patents

Procédé de remplissage d'un récipient au moins partiellement perméable au gaz Download PDF

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Publication number
EP4074610A1
EP4074610A1 EP21168396.6A EP21168396A EP4074610A1 EP 4074610 A1 EP4074610 A1 EP 4074610A1 EP 21168396 A EP21168396 A EP 21168396A EP 4074610 A1 EP4074610 A1 EP 4074610A1
Authority
EP
European Patent Office
Prior art keywords
filling
container
pressure
filling material
line
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.)
Pending
Application number
EP21168396.6A
Other languages
German (de)
English (en)
Inventor
Bernd Tillack
Jan Lorenzen
Janis Feye
Alexander Mildner
Alexander Boje
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.)
GREIF-VELOX Maschinenfabrik GmbH
Original Assignee
GREIF-VELOX Maschinenfabrik GmbH
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 GREIF-VELOX Maschinenfabrik GmbH filed Critical GREIF-VELOX Maschinenfabrik GmbH
Priority to EP21168396.6A priority Critical patent/EP4074610A1/fr
Priority to US17/575,845 priority patent/US11858668B2/en
Priority to CN202210060069.8A priority patent/CN115196058B/zh
Publication of EP4074610A1 publication Critical patent/EP4074610A1/fr
Pending 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
    • 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
    • B65B1/16—Methods of, or means for, filling the material into the containers or receptacles by pneumatic means, e.g. by suction
    • 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
    • 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
    • B65B1/20—Reducing volume of filled material
    • B65B1/26—Reducing volume of filled material by pneumatic means, e.g. suction
    • 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
    • B65B1/30—Devices or methods for controlling or determining the quantity or quality or the material fed or filled
    • B65B1/32—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by weighing
    • 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
    • B65B37/00—Supplying or feeding fluent-solid, plastic, or liquid material, or loose masses of small articles, to be packaged
    • B65B37/06—Supplying or feeding fluent-solid, plastic, or liquid material, or loose masses of small articles, to be packaged by pistons or pumps
    • 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
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/14—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of articles or material to be packaged
    • B65B57/145—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of articles or material to be packaged for fluent material

Definitions

  • the invention relates to a method for filling an at least partially gas-permeable container and a filling device for carrying out this method.
  • the container to be filled for example a paper valve bag
  • the filling material is conveyed through the filling spout into the gas-permeable valve bag and the entrained air is conveyed through the wall of the bag enters the valve chamber and is sucked off there.
  • this chamber is subjected to negative pressure by means of a vacuum pump. For exchanging a filled container for one that still needs to be filled The vacuum is broken and the chamber opened.
  • Vacuum filling has proven to be particularly advantageous because it can be reliably ensured that no filling material gets into the environment, since the container to be filled is sealed inside the vacuum chamber and the air sucked out of the vacuum chamber can also be cleaned by filters if necessary.
  • the invention is based on the object of improving a method for filling an at least partially gas-permeable container, in particular a valve bag or an FIBC, with pourable material such that the filling speed is increased.
  • a filling device is to be provided with which such an improved method can be carried out.
  • the method according to the invention for filling an at least partially gas-permeable container such as a valve bag or an FIBC with pourable filling material, in which the container is subjected to negative pressure on the outside in order to generate a filling material supply through a filling material line into the interior of the container is according to the invention characterized in that after a first filling time has elapsed, the filling process is supported by pressurizing the filling material line.
  • the basic idea of the filling method according to the invention is to provide a two-stage filling process, namely initially in a first stage by vacuum filling, since this is the most effective and fastest method for filling the container, especially with filling material of low density and fine grain.
  • the filling process is supported according to the invention by pressurizing the filling material line and thus significantly accelerated compared to pure vacuum filling or pure pressure filling.
  • the application of pressure preferably does not take place suddenly, but rather increases in accordance with the decrease in the filling speed.
  • the process must be controlled in such a way that the container wall is never overloaded. This is particularly important in the case of containers made of paper, but in principle also in the case of containers made of fabric or the like.
  • the pressure is applied, for example, by means of a feed pump, which actively conveys the filling material, whereby the pressure is applied.
  • the filling process can be accelerated by a factor of 2 or more compared to pure vacuum filling.
  • Negative pressure within the meaning of the present invention is a pressure that is below atmospheric pressure; such a negative pressure is also referred to as a vacuum in filling technology. It goes without saying that vacuum in the sense of the present invention is not the ideal vacuum pressure 0, but any negative pressure between this pressure 0 and atmospheric pressure. The terms vacuum and negative pressure are therefore used synonymously.
  • the pressurization of the filling material line which is supported after the end of the first filling time, is maintained until the end or almost the end of the filling process.
  • the negative pressure on the outside of the container is advantageously maintained during the entire filling process, with the negative pressure being able to be reduced after initiation of the pressurization of the filling material line, so as not to exceed the permissible load on the container.
  • Near the end is meant a period of time within the last 5% to 10% of the total fill time. It can be useful to slow down the filling process shortly before it ends in order to increase the filling accuracy. This then expediently takes place in that the pressurization, ie the active filling by the pump, ends and the filling process is only completed by means of vacuum filling.
  • the duration of the first filling time ie the duration during which vacuum filling takes place exclusively, is approximately half to two thirds of the duration of the total filling time. If the total filling time is 10 seconds, for example, then it has proven to be practicable to fill the first five to seven seconds of the filling time exclusively with a vacuum and only after five, at the latest after seven seconds, to add pressure to support the filling process.
  • the filling speed decreases with increasing filling time during vacuum filling of the container, it is expedient to determine the end of the first filling time, i.e. the point in time when a supportive pressurization of the filling material line is to begin, by the dropping of the filling speed to a predetermined value.
  • Such a determination is generally more favorable than specifying a fixed period of time for the first filling time, since individual deviations in the individual filling process are better taken into account as a result.
  • the filling method according to the invention is advantageously carried out using differential pressure regulation, which includes the differential pressure between the pressure prevailing in the container and the pressure surrounding the container.
  • differential pressure regulation includes the differential pressure between the pressure prevailing in the container and the pressure surrounding the container.
  • Such a maximum differential pressure is usually specified by the material of the container, this must not be exceeded in order to avoid damage to the container.
  • Such a differential pressure advantageously becomes constant after the initial build-up at the beginning of the filling process Value controlled, eg by a PID controller.
  • Such a differential pressure control also ensures that when the filling material line is pressurized to support the filling process, the application of negative pressure is reduced, if necessary, in order to keep the material stress on the container within permissible limits.
  • differential pressure a value between 300 mbar and 800 mbar, preferably between 500 mbar and 700 mbar. These values are particularly suitable for filling valve bags and FIBCs.
  • the differential pressure regulation is expediently designed in such a way that the application of negative pressure is maintained throughout the entire filling process, that is to say until the end of the filling process. In this way, it can advantageously be ensured that no filling material gets into the environment, but rather is removed in a targeted manner.
  • a filling device which is provided and suitable for carrying out the method according to the invention, has a vacuum chamber into which a filling material line opens, which is fed from a filling material container.
  • the vacuum chamber is provided and designed to accommodate the container to be filled.
  • sealing means are provided for sealing off the filling material line from the container to be filled, into which the filling material line opens.
  • the filling device is particularly characterized in that means for pressurizing the filling material line are provided, which cause pressurization during the filling process and thus support the filling process.
  • the means for pressurizing the filling material line are designed in such a way that during the filling process can be used to support.
  • Such means can be formed by suitable pumps, compressors in connection with jet guides similar to jet pumps or preferably by a diaphragm pump which introduces as little gas as possible, in particular air, into the filling system.
  • the filling device On the machine side, it is advantageous to design the filling device in such a way that two delivery lines are provided, which open into a common filling material line, of which one delivery line is provided for vacuum delivery and the other for pressure delivery. A corresponding pressure-increasing pump is then provided in the feed line for pressure feed, and a membrane pump is provided as a valve, whereas a valve is provided in the line for vacuum feed, with which this can be shut off completely or partially.
  • Towards the end of the filling process when the supporting pressurization in the delivery line is at its maximum, but the negative pressure in the vacuum chamber must still be maintained, it is usually advisable to shut off the negative pressure delivery line in order to be able to maintain a sufficient negative pressure in the negative pressure chamber.
  • the filling device advantageously has a control and regulating device which is provided and designed to regulate a differential pressure during the filling process between the interior of the container to be filled and the surrounding space in the vacuum chamber.
  • a control and regulating device is advantageously connected to appropriate sensors, namely means for detecting the pressure in the vacuum chamber and for detecting the pressure inside the container to be filled and/or for detecting the pressure in the filling material line.
  • the pressure can be detected by means of pressure sensors, one pressure sensor being advantageously arranged in the negative pressure chamber and another at or near the end of the Product line for recording the internal pressure.
  • the pressure at the end of the product line i.e.
  • a pressure sensor in the area of the filler neck is in a predetermined ratio to the pressure inside the container or corresponds to it, so that by arranging a pressure sensor in the area of the filler neck, a complex pressure sensor arrangement inside the container can usually be dispensed with.
  • the filling device advantageously has a line which is connected to the negative pressure chamber and is connected to a vacuum pump, with a vacuum control valve being integrated in the line and being integrated into the control device, i.e. controlled by the control and regulation device is.
  • a vacuum control valve being integrated in the line and being integrated into the control device, i.e. controlled by the control and regulation device is.
  • a corresponding control of the vacuum pump is conceivable, but in practice it is usually simpler and faster to control a vacuum control valve.
  • shut-off valve in the filling material line, so that the filling process can be interrupted or ended when a predetermined filling weight or filling volume is reached by shutting off the filling material line, whereby maintaining the negative pressure ensures that the filling material can be completely poured into the to be filled container is introduced and thus the filling process is completed clean before the vacuum chamber is opened to remove the filled container.
  • the filling device has a reservoir 1 for receiving filling material 2 , which is connected to a filling material line 4 via a conveying line 3 .
  • a filling nozzle 5 is arranged at the end of the filling material line and ends within a vacuum chamber 6 which is designed to accommodate a container 7 to be filled.
  • This vacuum chamber 6, which can be completely sealed off from the environment, is connected via a vacuum line 8 with a vacuum control valve 9 in between to a vacuum pump 10, the outlet line 11 of which opens into the outside atmosphere, optionally with the interposition of filters.
  • the vacuum chamber 6 is connected to the machine frame via a weighing device 12, with which the filling weight of the container 7 can be determined.
  • a support body 13 is arranged inside the vacuum chamber 6 and serves to support the container 7 at the side and bottom during the filling process. This supporting body 13 is constructed like a grid.
  • the filling device has a control and regulating device 14, which is used on the output side to control the vacuum control valve 9 is provided and on the input side detects the pressure in the vacuum chamber 6 via a first pressure sensor 15 and the pressure within the container 7 via a second pressure sensor 16 .
  • This second pressure sensor 16 is arranged at the end of the product line 4 within the filler neck 5 .
  • a shut-off valve 17 is arranged in the filling material line 4, which is controlled by the control and regulating device 14 and is not only provided for opening and closing the filling material line 14, but can also be brought into intermediate positions.
  • a corresponding shut-off valve 18 is provided in the delivery line 3 from the reservoir 1 to the filling material line 4 .
  • the vacuum chamber 6 can be opened for the purpose of removing a filled container 7 and introducing an empty container 7;
  • the structure described above corresponds to that of a vacuum packer according to the prior art.
  • the filling device also has a second delivery line 20 running parallel to the delivery line 3, which also connects the reservoir 1 to the filling material line 4 and in which a diaphragm pump 21 is integrated, which is controlled by the control and regulating device 14.
  • the filling device has a third pressure sensor 22 which detects the pressure in the product line 4 between the delivery line 3 , 20 and the shut-off valve 17 . This sensor 22 is also signal-connected to the control and regulation device 14 .
  • a container 7 is filled with the filling device described above as follows:
  • the container 7, for example a valve bag is placed with the filling valve on the filling spout 5 with the vacuum chamber 6 open, after which the seal 19, which surrounds the filling spout 5 in a ring, is pressurized with compressed air, as a result of which it is sealed off from the interior of the valve bag 7.
  • the valve bag is located within the supporting body 13 within the vacuum chamber 6, which is tightly closed after the valve bag 7 has been put on.
  • the vacuum pump 10 is then switched on with the vacuum control valve 9 closed and the filling process begins in that the shut-off valves 17 and 18 are opened and the control valve 9 is opened at time t0.
  • the vacuum chamber 6 When the control valve 9 opens, the vacuum chamber 6 is subjected to negative pressure, as a result of which the filling material 2 is conveyed through the conveying line 3 , the filling material line 4 and the filler neck 5 into the interior of the valve bag 7 .
  • the weight of the sack 7 is recorded by the weighing device 12 .
  • the course of the product weight from the start of the filling process to until the target weight is reached at time t 2 is in figure 2 represented by the dashed curve 25.
  • the valve bag 7 is filled up to a point in time t 1 exclusively by negative pressure, that is to say in the same way as is done with conventional vacuum filling technology.
  • time t 1 has been reached, that is, the first filling time in which is filled exclusively by vacuum, ended.
  • the membrane pump 21 is actuated to deliver and the shut-off valve 18 in the delivery line 3 is actuated to close, so that now, in addition to the product weight generated by the vacuum, which is shown in the curve 27 shown as a solid line in figure 2 is shown, a further product flow occurs, which is caused by the pressure generated by the membrane pump 21 in the delivery line 20 and subsequently in the filling material line 4 .
  • the filling weight additionally generated by the feed pump 21 is shown in the curve 28 in figure 2 shown, which is dash-double-dotted.
  • part of the product weight is now generated by the negative pressure generated by pump 10 and part of the product weight is generated by the positive pressure generated by pump 21 .
  • the product weight generated by the respective conveying flows is added, so that the curve 25 has already reached the target weight 23 at time t 2 , ie after the end of the filling time.
  • the duration of the first filling time t 0 to t 1 is approximately half the total filling time t 0 to t 2 .
  • the regulation is carried out via the differential pressure between the bag interior and the environment within the vacuum chamber 6, so based on the differential pressure determined by the sensors 15 and 16.
  • This is to be controlled as constantly as possible after an initial build-up. That means in practice that when pressure is applied to the delivery line 20 and in the product line 4, the vacuum control valve 9 must be retracted in order to keep the differential pressure constant. Since the vacuum chamber 6 is to be subjected to negative pressure until the end of the filling time, i.e. until time t 2 , the negative pressure valve 9 is to be controlled in such a way that the negative pressure is reduced in comparison to the negative pressure required during the first filling time. This is based on figure 3 shown schematically, which shows the pressure curve over time.
  • the differential pressure is shown as curve 29 corresponding to curve 29 in figure 2 shown.
  • the dashed curve 30 shows the pressure applied by the delivery pump 21, whereas the solid curve 31 represents the pressure (negative pressure) generated by the vacuum pump 10 in conjunction with the vacuum control valve 9.
  • the differential pressure 29 results from the addition of the overpressure generated by the pump 21 and the negative pressure generated by the pump 10 according to curve 31.
  • this multi-stage filling process can also take place at other pressure levels. It is crucial that the permissible pressure difference is not exceeded, which at the same time limits the speed of the filling process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Vacuum Packaging (AREA)
  • Basic Packing Technique (AREA)
EP21168396.6A 2021-04-14 2021-04-14 Procédé de remplissage d'un récipient au moins partiellement perméable au gaz Pending EP4074610A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP21168396.6A EP4074610A1 (fr) 2021-04-14 2021-04-14 Procédé de remplissage d'un récipient au moins partiellement perméable au gaz
US17/575,845 US11858668B2 (en) 2021-04-14 2022-01-14 Method for filling an at least partially gas-permeable container
CN202210060069.8A CN115196058B (zh) 2021-04-14 2022-01-19 填装至少部分透气的容器的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21168396.6A EP4074610A1 (fr) 2021-04-14 2021-04-14 Procédé de remplissage d'un récipient au moins partiellement perméable au gaz

Publications (1)

Publication Number Publication Date
EP4074610A1 true EP4074610A1 (fr) 2022-10-19

Family

ID=75529890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21168396.6A Pending EP4074610A1 (fr) 2021-04-14 2021-04-14 Procédé de remplissage d'un récipient au moins partiellement perméable au gaz

Country Status (3)

Country Link
US (1) US11858668B2 (fr)
EP (1) EP4074610A1 (fr)
CN (1) CN115196058B (fr)

Citations (4)

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EP2288544B1 (fr) * 2008-05-27 2012-07-18 Haver & Boecker oHG Procede et installation de remplissage de sacs
DE102016108324A1 (de) * 2016-05-04 2017-11-09 Haver & Boecker Ohg Vorrichtung und Verfahren zum Füllen von Großsäcken
EP3581500A1 (fr) * 2018-06-15 2019-12-18 GREIF-VELOX Maschinenfabrik GmbH Dispositif de remplissage de sac à valve

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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2288544B1 (fr) * 2008-05-27 2012-07-18 Haver & Boecker oHG Procede et installation de remplissage de sacs
DE102008054717A1 (de) 2008-12-16 2010-06-17 Evonik Degussa Gmbh Optimierte Anbindung eines Vakuumpackers an Silos zur Abfüllung von hochdispersen Stoffen in einen Behälter
DE102016108324A1 (de) * 2016-05-04 2017-11-09 Haver & Boecker Ohg Vorrichtung und Verfahren zum Füllen von Großsäcken
EP3581500A1 (fr) * 2018-06-15 2019-12-18 GREIF-VELOX Maschinenfabrik GmbH Dispositif de remplissage de sac à valve

Also Published As

Publication number Publication date
CN115196058A (zh) 2022-10-18
CN115196058B (zh) 2024-06-14
US20220332446A1 (en) 2022-10-20
US11858668B2 (en) 2024-01-02

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