EP2139773A1 - Bag filling method on a forming, filling and sealing machine - Google Patents
Bag filling method on a forming, filling and sealing machineInfo
- Publication number
- EP2139773A1 EP2139773A1 EP08734811A EP08734811A EP2139773A1 EP 2139773 A1 EP2139773 A1 EP 2139773A1 EP 08734811 A EP08734811 A EP 08734811A EP 08734811 A EP08734811 A EP 08734811A EP 2139773 A1 EP2139773 A1 EP 2139773A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filling
- bag
- relative movement
- weight
- phase
- 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
Links
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
- B65B1/30—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
- B65B1/34—Adjusting weight by trickle feed
-
- 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
- B65B1/10—Methods of, or means for, filling the material into the containers or receptacles by rotary feeders
- B65B1/12—Methods of, or means for, filling the material into the containers or receptacles by rotary feeders of screw type
-
- 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
- B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
- B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
- B65B43/46—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation using grippers
- B65B43/465—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation using grippers for 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
- B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
- B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
- B65B43/54—Means for supporting containers or receptacles during the filling operation
- B65B43/56—Means for supporting containers or receptacles during the filling operation movable stepwise to position container or receptacle for the reception of successive increments of contents
- B65B43/58—Means for supporting containers or receptacles during the filling operation movable stepwise to position container or receptacle for the reception of successive increments of contents vertically movable
Definitions
- the invention relates to a method for producing, filling and sealing of plastic bags with dusty or granular bulk material and for closing the filled bags.
- Such a device is known for example from DE 93 01 355 U.
- a device for producing, filling and closing unilaterally open preferably provided with gusseted bags of thermoplastic described in which a first welding and separation station to form the bag with bottom seam, a filling station and a second welding station for closing the bag available.
- these filling machines are classified in the FFS (Form FiII and Seal) category.
- the filling of dusty goods according to the known filling method described usually leads to a significantly inflated product volume or to a significant reduction in bulk density, since the product accumulates heavily in the free fall with air. This, in turn, leads to bottling the product initially much more packaging material is needed. In addition, the air must be able to escape from the bag again, otherwise it can not be stacked or stored.
- EP 1 459 981 A1 therefore proposes to introduce the filler neck of a metering device of an FFS machine into the opening of a bag. In WO 2006/053627 A1, however, the relative movement between the sack and the filler neck is accomplished by a movement of the sack.
- weighing methods for dusty goods discussed.
- such weighing methods when carried out during filling, are also carried out over long periods of time, since the backfilling of dusty filling material without excessive dust development often lasts longer than the filling of an equal amount of conventional filling material.
- errors may include a sack crack, slippage of the sack from the holding tongs, snail breakage or clogging of the worm (if a worm is used). It can be seen that such errors, especially in the case of dusty filling goods, can lead to great contamination of the machine and the machine hall and even damage to the machine park.
- a film tube can be unwound from a settlement.
- the invention makes use of the fact that less dust is formed when the mouth of the Be colllorgans is below the Be colllgutsaustrittsö réelle of the metering. It is surprising that meaningful signals can be obtained with load cells, while there is mechanical contact of the filling material in the bag and the metering device. It is an advantage to filter these signals. In this case, it has been shown that the filling member mainly generates higher-frequency interference signals, which can be eliminated by filtering the signals.
- Another measure that can increase filling speed and quality of measurement is a relative movement of dosing and bag during the filling process. When this relative movement is uniform, spurious signals are limited. This is especially true when the sack is moved uniformly.
- the measured values obtained during the submillar filling can advantageously be used as weight measured values for checking or regulating the bag weight during filling.
- This definition implies that, based on the weight measurements, the time at which the bag filling ends is determined. It also includes that a control of the filling speed and / or the speed of the relative movement between the bag and Be Pavllorgan is made.
- the filling speed that is, the weight increase per unit time or the first derivative of the weight after the time, can be used to detect errors that occur during the filling process.
- Such flaws can include a sack crack, which usually results in a rapid decrease in weight gain.
- the outlined procedure is believed to work best when the control unit emits a warning signal as the weight gain moves out of a desired range.
- the warning signal can be used by the control unit and / or the machine personnel to correct the error.
- monitoring the first derivative of weight gain over time provides insights into the quality of the filling process and early fault detection.
- a measurement with a radiation sensor can also be used to determine the Be Schollgutstandes.
- a radiation can be used which penetrates the bag material, but not the filling material.
- On the side facing away from the radiation emitter side of the bag radiation can only be collected by a suitable sensor when the transmitter and receiver are located above the Gregutspiegels.
- This warning signal which of course can also lead manually (by the machine operator) or automatically (by a control device) to a control process, can reveal or expose a whole series of errors or failure mechanisms.
- This teaching also appears to be advantageous for non-dusty filling goods.
- the second period of time during the filling process it is advantageous if the measured values for the bag weight constantly arriving in the control device are not used to control or regulate the bag weight. In this way it is possible to hide the influence of disturbing weight signals on the filling process.
- the second period may overlap with the first period in which the weight gain is controlled. It may be shorter, longer, or the same as or the first, and may be before, during, or after the first one.
- volumetric weight determination means for example, that a measured or known number of screw revolutions is multiplied or otherwise mathematically linked to a known product delivery rate per revolution, so that the weight or volume of the material conveyed into the bag at one time is determined or included can be estimated with sufficient accuracy.
- the load cells can again assume the provision of measured values.
- load cells for the purposes of this document covers all suitable weight sensors such as scales and just the load cells themselves.
- load cells those weight sensors that contain electrical resistances arranged in the form of a Wheatstone bridge.
- the resistors change their ohmic resistance when deformed.
- the resistors are mounted on an element that deforms as the weight changes. Accordingly, the electrical output values of the Wheatstone bridge, which underlie the weight measurement change.
- empirical weight measurement is a measure or estimate that is only or largely due based on empirical values (eg, during a time T, a volume V of a particular filling material is filled).
- Explicit use can also be made in a fourth period of time, which can again be configured in position and duration as desired at the other time periods.
- This fourth period of time is advantageous at the end of the filling process.
- a fifth period of time which can again be designed as desired in position and duration at the other time intervals, the filling can be carried out for the benefit of the overall process, while the outlet of the filling element is located above the filling material level.
- This phase of filling for example, can also be found at the end of the filling process and used to enable a sensitive and accurate dosing of the filling material.
- the filling is advantageously carried out with a method according to the invention, among other cement, titanium dioxide and all kinds of plastic dusts into consideration.
- the expert should understand under dusty goods bulk goods that just can not be filled on an FFS machine, unless a special filling process that often uses screws to guide the bulk material, is used.
- the invention also relates to devices for automated implementation of the method or the different in this Document disclosed method.
- Such devices are typically controlled and / or controlled by control devices which are acted upon by stored instruction sequences which order and / or monitor the methods described above.
- These control programs are stored either on components of the control device or on other data carriers such as CDs or DVDs. It is also possible to send parts or the entirety of such programs.
- data set is used in this application.This term also includes the transmission of the relevant electronic information via networks, for example by e -Mail.
- FIG. 1 side view of an FFS machine
- Fig. 3 shows the course of the bag weight, plotted against time
- Fig. 4 shows the course of the bag weight, plotted against time
- Fig. 5 shows the course of the bag weight, plotted against time
- Fig. 6 shows the course of the bag weight gain, plotted against time
- Fig. 7 shows the course of the bag weight, plotted against time
- FIG. 8 shows the course of the bag weight, plotted against time
- FIG. 9 shows the course of the bag weight, plotted against time (3. Exemplary embodiment, nomenclature with respect to the lower mirror filling)
- the closed at the lower end empty bag 11 is a horizontally displaceable transport, such as a gripper 18, passed and transported to the filling station. In the filling station takes over a further transport 4, which consists of 3,4,5, the bag section.
- the empty bag is now opened with a suction system 16.
- the gripper 4 or be moved in the Z direction (sackeinafter).
- the connecting piece of the transport system 3 is moved into the bag and protects the sack inner surfaces from contamination by possible product adherence to the metering tube 2,21.
- the opened bag is pulled by the transport system 3,4,5 on the metering tube 2,21 until the lower end of the bag is approximately equal to the Gregutaustrittsö réelle 31.
- the bag bottom support device 32,33,34 is driven in the embodiment shown below the sack floor.
- a bag bottom support device 32, 33, 34 is not absolutely necessary. Rather, the relative movement of the bag relative to the Be Stirllorgan 2,21 mainly caused by the fact that the frame 5 along the guide 6 moves. This is represented by the double arrow 35. In this embodiment of the invention, therefore, the bag is moved relative to the Be refhapllorgan 2,21.
- the product outlet opening 31 may be located at least once above the filling level 38.
- the closure tube 21 is lowered and closes the product outlet opening 31 by making contact with the closure 20.
- the connecting piece is pulled out of the bag.
- the gripper (s) 4 of the transport system 3, 4, 5 is or will now be moved counter to the Z direction (out of the bag) and tightens the opening area at the upper edge 25 of the previously opened bag.
- Another means of transport takes over the filled bag 8.
- the closing device 14 By means of the closing device 14, the upper edge of the bag 25 is now closed. If necessary, it can be sucked out by the filter integrated in the closure tube 21 together with the dosing process.
- the required vacuum is introduced via the pipe 23.
- the integration of the filter in the closure tube allows a very compact design, which makes it possible to fill even relatively small bags.
- the suction of the air leads to a certain extent to a compression of the bulk material.
- a sack size appropriate to the product quantity can be selected.
- vibration generators / beaters 29 This effect of product compaction can be enhanced by the additional use of vibration generators / beaters 29. It is advantageous here to set the dosing tube 2, 21 in vibration by means of a vibration generator 29, since it is located within the product at least with parts of its lateral surface during filling. The vibrations are transmitted from the dosing 2.21 to the filling material 24, in which then takes place a compression. A further advantage of the "vibrating metering tube" 2.21 is that the formation of product adhesions on the metering tube 2, 21 is thereby largely avoided.
- the vibrator 29 could also be arranged on the "bag bottom support device" 34!
- a particularly advantageous embodiment of the carriage is the frame 5 together with the neck 3, transport 4 and the absorption 16 to sensors to store.
- the sensors send their signal to a weighing electronics, which ultimately controls the dosing process.
- the metering or pipe 2 In the metering or pipe 2 is a screw 7, can be promoted with the filling material 24 from the hopper 1 without much dust in the bag 8.
- the various sensors 26 (in particular weighing sensors or load cells) indicate advantageous locations for attaching such sensors.
- the conveyor belt 27 transports the filled bags (8). In the vicinity thereof, the checkweigher 30 and the vibration generator 29 are mounted.
- FIGS. 3 to 5 show the time course of the bag weight in three embodiments of the invention. With respect to these figures, the terms previously used with respect to monitoring the filling rate g / t are used.
- FIGS. 7 to 9 show the same exemplary embodiments and use the terms that have already been used above with reference to the submirror filling with simultaneous generation of measuring signals. This distinction increases the clarity and facilitates the distinction between inventive and non-inventive filling method.
- v R relative speed
- a M minimum distance between bottom of bag 39 and mouth 31.
- FIG. 3 shows the time course of the weight increase of a bag during the execution of a bag filling method.
- the bag weight g is plotted on the vertical axis and the time t on the horizontal axis.
- Interference signals are caused here mainly by the Be Schollorgan 2,21 whose Basal Bachsö réelle 31 is yes in the period Z 3 , which coincides here with the phase 1 and time Z 2 , below the Be Schollgutapts 38 is located.
- the filling element will be at the beginning of the filling above the filling material level 38, since there is still no or too little filling material in the bag 8. This circumstance is taken into account here by the fact that the time period Z 3 does not begin at time 0 but at time T 2 .
- the phase P 2 of the bag filling begins.
- this time will be regarded as having been attained if, on the basis of the volumetric measurement or estimation of the bag weight, it can be assumed that a certain proportion Gi of the bag target weight Gs o ii has been reached. This percentage can be 95%.
- some parameters of the bag filling now change: the bag weight is actually monitored by the evaluation of the weighing cell signals and the filling takes place while the filling element 2, 21 is located entirely above the filling material level 38. This improves the quality of the weight measurements.
- the monitoring of the weight increase is carried out during the entire filling process in this embodiment.
- the filling process ends when the target weight Gs o ii is reached.
- the termination is performed automatically by the control device, not shown, when the load cells 26 report the desired signals to the control device.
- the filling rate is lower in Phase 2 than in Phase 1.
- FIG. 3 Another variant of this method is illustrated in FIG. It suffices at this point to name the differences from the embodiment shown in FIG. 3:
- the period Z 4 in which the signals of the load cells are also used to control / regulate the bag weight, lasts during the entire filling process. There is no volumetric weight control. It is advantageous if the interference signals, which arise in particular during the submillar filling (Z 3 ), are eliminated by filters on the measuring signals.
- FIG. 6 shows how the first derivative of the weight after the time g / t behaves during the filling process in the exemplary embodiment shown in FIG. It is constant.
- the curly bracket S indicates the desired range. This does not necessarily have to be symmetrical about the desired value G / T S ⁇ ⁇ .
- the target range S has a lower Su and an upper So limit.
- the arrows 36, 37 indicate that the value g / t can leave the target range if an error occurs.
- a course of the weight change according to the arrow 36 can occur as a result of a blind crack.
- an alarm is triggered, which can trigger measures of the machine personnel and / or the control device.
- the target weight Gsoii should be achieved while the relative movement between bag 8 and metering device 2 is still ongoing. As already stated several times, this relative movement can be brought about by a movement of one or both of these two elements 2, 8. It is also possible for the relative movement to be slowed or stopped immediately after the time at which the last really still utilized measuring signal of the weighing cells is produced. This may be before reaching the target weight, and the time span between this last measurement signal and the termination of the bag filling upon reaching the target weight Gs o ii can be obtained from the knowledge of the filling speed alone by timing and calculation.
- FIG. 7 again shows the same exemplary embodiment as FIG. 3, but additionally uses the terms introduced in relation to the measurement of the bag weight during the submillar filling.
- the phase Pu in which is filled in the sub-mirror process is equivalent to the third period Z 3 .
- This period is preceded here by the phase PL, in which the mouth 31 of the Be Schollorgans 2 is not below the Grepapt 38, since the mouth 31 is a minimum distance A M above the bottom of the bag 39 and there is not enough good in the bag 8 to to cover the mouth 31.
- the relative velocity v R between the sack 8 and metering member 2 is set so that it is slower than the speed v F> with which the filling material rises in the bag.
- v R can also be zero here.
- the Be Schollgutapt 38 "overtook" the mouth 31 until a desired distance As 0 Ii is reached between Golfgutapt 38 and mouth 31. From this time T 2 , the velocities v R and v F are equalized, so that the distance As O ⁇ remains ,
- the weight measurements are not used to control the bag weight g.
- the load cell signals are used to control the filling speed g / t in the entire period Zi. Therefore, the phase PM, in which the measured values are utilized in any desired form while being filled in the submirror process, thus lasts between the times T 2 and Ti during the entire submirror filling.
- the overlap between the periods PR and P L indicates that there is still a relative velocity greater than zero in the phase P L (slowed relative movement v R between the sack 8 and the metering element 2).
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007014892A DE102007014892A1 (en) | 2007-03-26 | 2007-03-26 | Sack filling process on a form, fill and seal machine |
PCT/EP2008/002429 WO2008116653A1 (en) | 2007-03-26 | 2008-03-21 | Bag filling method on a forming, filling and sealing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2139773A1 true EP2139773A1 (en) | 2010-01-06 |
EP2139773B1 EP2139773B1 (en) | 2010-07-21 |
Family
ID=39590666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08734811A Not-in-force EP2139773B1 (en) | 2007-03-26 | 2008-03-21 | Bag filling method on a forming, filling and sealing machine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2139773B1 (en) |
AT (1) | ATE474774T1 (en) |
DE (2) | DE102007014892A1 (en) |
ES (1) | ES2348992T3 (en) |
WO (1) | WO2008116653A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102390552A (en) * | 2011-07-26 | 2012-03-28 | 广州市锐嘉包装设备有限公司 | Regular particle material composition quantitative filling machine and filling method thereof |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5336412B2 (en) * | 2010-04-01 | 2013-11-06 | 東洋自動機株式会社 | Package filling apparatus and filling method in bag filling and packaging machine |
CN108528833A (en) * | 2018-04-27 | 2018-09-14 | 丁涛 | Accurately control the drug granule packing machine and method of discharge quantity |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB579529A (en) * | 1943-06-18 | 1946-08-07 | Quaker Oats Co | Improvements in or relating to the packaging of materials |
DE9301355U1 (en) | 1992-10-26 | 1993-11-25 | Windmoeller & Hoelscher | Device for filling and closing bags open on one side |
DE4447051C2 (en) * | 1994-12-29 | 2002-07-04 | Rovema Gmbh | Process for dispensing bulk goods in portions |
DE19920478C2 (en) | 1999-05-04 | 2001-05-03 | Windmoeller & Hoelscher | Device for producing and preferably also for filling and closing bags made of thermoplastic material |
ES2251901T3 (en) | 2000-10-24 | 2006-05-16 | WINDMOLLER & HOLSCHER | DEVICE FOR MANUFACTURING AND, PREFERIBLY, ALSO TO FILL AND CLOSE SACKS OF THERMOPLASTIC SYNTHETIC MATERIAL. |
ITMI20030519A1 (en) | 2003-03-18 | 2004-09-19 | Concetti Spa | EQUIPMENT FOR FILLING BAGS WITH MATERIAL |
EP1773668A2 (en) * | 2004-06-30 | 2007-04-18 | Haver & Boecker oHG | Filling plant |
DE102004038323B4 (en) * | 2004-08-06 | 2006-10-26 | Khs Ag | Method for the lower layer filling of bottles or similar containers and filling machine for carrying out the method |
DE102005037916B4 (en) | 2004-11-11 | 2018-08-02 | Windmöller & Hölscher Kg | Machine for forming, filling and closing sacks and method of operating same |
-
2007
- 2007-03-26 DE DE102007014892A patent/DE102007014892A1/en not_active Ceased
-
2008
- 2008-03-21 DE DE502008000997T patent/DE502008000997D1/en active Active
- 2008-03-21 AT AT08734811T patent/ATE474774T1/en active
- 2008-03-21 WO PCT/EP2008/002429 patent/WO2008116653A1/en active Application Filing
- 2008-03-21 ES ES08734811T patent/ES2348992T3/en active Active
- 2008-03-21 EP EP08734811A patent/EP2139773B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2008116653A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102390552A (en) * | 2011-07-26 | 2012-03-28 | 广州市锐嘉包装设备有限公司 | Regular particle material composition quantitative filling machine and filling method thereof |
Also Published As
Publication number | Publication date |
---|---|
DE502008000997D1 (en) | 2010-09-02 |
ATE474774T1 (en) | 2010-08-15 |
EP2139773B1 (en) | 2010-07-21 |
ES2348992T3 (en) | 2010-12-21 |
WO2008116653A1 (en) | 2008-10-02 |
DE102007014892A1 (en) | 2008-10-02 |
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