EP3787980A1

EP3787980A1 - Device and method for packaging bulk materials in open bags

Info

Publication number: EP3787980A1
Application number: EP19726314.8A
Authority: EP
Inventors: Christian ROLF; Dominik BLESS; Heinz-Peter Felling; Christian HINSE
Original assignee: Haver and Boecker OHG
Current assignee: Haver and Boecker OHG
Priority date: 2018-05-03
Filing date: 2019-05-02
Publication date: 2021-03-10
Also published as: DE102018110637A1; WO2019211398A1; CN112334392A; CN112334392B; US20210188469A1

Abstract

The invention relates to a device and method for packaging bulk materials in open bags (2), comprising the following steps: a) an open bag (2) is hung onto a filling nozzle (6) of a filling station from below by means of a movement directed at least partially upward, such that the base end (9) of the open bag (2) hangs freely; b) the filling process is started and bulk material is introduced into the open bag (2), such that the freely hanging base end (9) of the open bag (2) unfolds; c) the filling nozzle (6) is lowered, such that the unfolded base end (9) of the open bag (2) rests, at the underside thereof, on a supporting surface.

Description

Device and method for filling bulk materials in

open-mouth bags

Besehreibung

The present invention relates to an apparatus and a method for filling bulk materials into open sacks. Such a device can be designed, for example, as a form-fill-seal system (FFS). An FFS plant provides the for the

Filling provided open sacks for example from a

Hose film on site directly at the machine. But it is also possible that prefabricated open sacks of the device

be supplied. The device and the method are used in particular for filling bulk materials, in which a certain amount of air with enters the open sack, which during or after the filling at least partially back out of the

Offensack is derived.

Various devices and methods are known

to fill bulk goods into open sacks. DE 199 33 486 02 discloses a device for filling and closing unilaterally open and preferably with gussets

provided sacks. Here is a filling station with a

Filler provided for filling the bags and a force acting on the bottom of the Offensack vibrator. Various grippers are used for transporting the empty open sacks, for holding the open sacks in the filling station and for transporting the filled open sacks. Below the filling station begins a conveyor belt for supporting and transporting the filled open sacks. The

Conveyor belt has one around two pulleys and over two

Abknickrollen running Trum on. Below the filling station is a part of the conveyor belt by pivoting a pulley lowered and raised again. Between the upper and lower run of the conveyor belt is in the swinging or

hinged part of the conveyor belt and directly below the filling station a Bodenrüttler mounted in the

folded position on the upper run of the conveyor belt and thus acting on a sack bottom standing on it. In the known device, an open bag is attached to the filler neck. The length of the open sack is dimensioned such that the bottom end of the open sack on the swung part of the

Conveyor belt would rest. At the beginning of the filling process, however, the hinged part of the conveyor belt is down

pivoted so that the bottom end of the open sack hangs down freely. Already during the filling process, the folded-down part of the conveyor belt is pivoted upwards, so that the upper strand comes into contact with the bottom end of the openable bag to be filled. The vibrator mounted directly under the upper run thus acts directly through the upper run to the bottom end of the offensive bag to be filled. As a result, an effective compression of the bulk material in the open sack is already achieved during the filling process.

In another known device, the conveyor belt does not begin below the filler neck, but is arranged downstream of the filler neck. Below the filling a Bodenrüttler is provided, which is designed to be raised and lowered overall. This can be lowered before starting the filling in this known device, the Bodenrüttler. The bottom end of the offensive bag to be filled then also hangs freely above the bottom vibrator at the beginning of the filling. As a result, the product push first entering the open sack opens the bottom end of the product

Open sack completely and usually wrinkle-free. Subsequently, the bottom vibrator may be lifted until the bottom vibrator supports and vibrates the bottom end of the open-mouth bag to be filled, so that effective compression can occur during a substantial portion of the filling operation. After completion of the filling process, the filled open-mouth bag is pulled onto the conveyor belt via sliding flaps in this known device. At the open top end of the open sack, grippers guide the open sack while moving on the conveyor belt. This prior art works satisfactorily. However, a disadvantage is the increased effort, since on the one hand the Bodenrüttler can be raised and lowered via a separate drive and there continue to be used the pusher flaps to pull the filled open bag from the Bodenrüttler on the conveyor belt. As a result, the drive used for this purpose must have a considerable strength.

It is therefore an object of the present invention to provide a device and a method available, which with less effort an effective filling of bulk materials in open-mouth bags is possible.

This object is achieved by a method having the features of claim 1 and by an apparatus having the features of claim 14. Preferred developments of the invention are the subject of the dependent claims. Further advantages and features of the present invention will become apparent from the general

Description and from the description of the embodiments.

The inventive method is used for filling of

Bulk goods in open sacks and comprises the following steps in this or another suitable order: a) an open sack is moved by an at least partially upward movement from below to a filler neck of a

Attached filling station, so that the bottom end of the open bag hangs freely; b) the filling process is started and bulk material is introduced into the open sack, so that unfolds the free-hanging bottom end of the open sack; c) the filler neck is lowered so that the unfolded

Bottom end of the open bag rests on the bottom.

In particular, in a method step c), the filler neck with the attached open sack is placed on a base and lowered in particular on a conveyor (as a support). Preferably, the bottom end of the offensive bag is supported during at least one (substantial) part of the filling process from below, in particular by the underlay or the conveying device. In this case, the bottom end of the offensive bag is supported in particular while product still enters the open sack.

The method according to the invention has many advantages. One

considerable advantage of the method according to the invention is that first an open bag is attached to the filler neck, so that the bottom end of the open bag hangs freely. This allows the filling process to be started and bulk material to be introduced into the open sack while the bottom end of the open sack hangs freely and thus unfolds wrinkle-free.

In contrast to the prior art, a separate drive for a height-adjustable floor vibrator is not needed.

It is also possible, below the filling station a

Positioning conveyor, which removes the filled open bag after filling.

It is preferred that the open sack is introduced with a pivoting movement from below, so that in step a) the filler neck dips into the open sack. It is likewise preferred that the filler neck then completely opens the open sack in method step a). Before or in the

Method step a), it is preferred that the opening bag is gripped at the top of the open bag by a set of feed grippers and transported to the filler neck.

For the purposes of the present invention, the term "open sack" is understood to mean a specific type of sack and not the condition of the sack, so that a (still open) open sack is regularly closed after filling by a top seam in the

Difference to, for example, a valve bag having a sewn or glued in the rule valve, which automatically closes the valve bag after filling, so a There is some protection against leakage of material from inside the valve sack. Open sacks, on the other hand, are filled via the headboard that is open at the top. There is regularly a big one

Füllquerschnitt ago, which may be limited by gussets and provided therein Eckenabschweißungen.

The invention is particularly intended for use in the high and high performance range, with more than 1800 bags per hour and in particular more than 2400 bags per hour and more preferably more than 2500 or 2600 or 2700 bags or more per hour (produced and) filled , The filling of the bulk material at such speeds takes only about 0.4 to about 0.8 seconds, since the remaining cycle time for attaching the empty offensive bag and for removing the filled offensive bag is needed. At such fast cycle times are high acceleration forces during transport of the filled

To overcome open sacks. A driven conveyor below the filler neck, on which the filled open bag with its bottom of the bag gets up, allows a considerably simpler acceleration than the use of pusher flaps, which pull off a filled open bag from a bottom vibrator. A "bag" in the sense of the present application is always understood as an "open bag".

In preferred embodiments, in the method step c) the filler neck with the attached open bag is lowered onto a base and in particular a conveyor, where the

Bottom of the open bag is supported during at least part of the filling process from below. This means that the open bag still during the filling process and during the

Loading bulk material is lowered into the open bag. It is possible that the lowering process is started before the flow of bulk material is started. Essential in the sense of

However, it is the present invention that the bulk material reaches the bottom end of the bag before the bottom end of the bag

Offensacks of a pad and in particular the

Conveyor is supported. Whether the filling process or the lowering process is started first is a question the control and coordination of the process. On the other hand, it is important that the bottom end of the offensive sack penetrates the

Bulk material impact can develop freely. This is guaranteed if at the time of impact, the bottom end hangs freely.

Preferably, the bulk material is compressed in the stationary on the conveyor opener bag during the filling process, in particular at least from below. This can be done in the

Conveyor at least one compression device to be integrated or incorporated therein, which already acts during the filling process from below on the base of the conveyor, for example, vibrating to the bulk material in the

To compact open bag.

In preferred embodiments, in the process step a) holding grippers engage the open sack. The holding grippers are

preferably in process step c) together with the

Filler lowered. In particular, the holding grippers ensure that the top end of the open sack and the area of the side gussets maintain their defined shape and the filled open sack can then be further defined. This is important so that as little bag material as possible is needed.

The consumption of only 1% more sack material leads at 24 hours a year to very significant additional costs. A defined handling of the open sacks allows economical operation. It avoids unnecessary and undefined re-maturation, which would lead to a larger sack material consumption. In addition, the holding grippers hold the open sack even when filling.

In preferred developments, the holding gripper give the

Offensack free after filling and are driven together with the filler neck up while the open bag on the conveyor rises. Particularly preferred

Abfuhrgreifer the head of the offensive bag before the holding gripper release the open bag to ensure at any time defined conditions. In all embodiments, it is particularly preferred that the open sack is transported further after the filling end by means of the conveyor. The drive for such a transport can be easily realized.

Preferably, the opening bag in the further transport on

Head end guided by removal gripper.

In all embodiments, it is preferred that the open-sack is formed from a tubular film before being attached. It is preferred that the tubular film is unwound here from a film roll. Preferably, a bottom seam is first introduced into the tubular film and the tubular film is then further by a cycle length and in particular a bag length

transported. Subsequently, preferably, the tubular film is cut off at the head end to form an open sack. After the production of the bottom seam, a separate bottom seam cooling can be provided so that high speeds are possible.

It is preferred that the head end of the open sack beforehand

Attach to the filler neck pre-opened or opened. This can be done for example via lateral suckers that pre-open the open bag defined at the head.

In one of the filling station preferably upstream

Opening station (Voröffnungsstation) is the open bag

preferably opened (pre-opened) to allow easier immersion of the filler neck. In particular, during the transfer (transport) of the open sack from the opening station (pre-opening station), open holders (having a profile preferably corresponding to the filler neck) keep the open sacks open. If the open bag is only pre-opened, preferably a complete opening is made at the filler neck or through the

Filler neck.

In all embodiments, it is preferred that the filler neck is designed as a valve neck and in an at least

pre-opened head end dips and that the flap neck then unfolds and the headboard opens further. The filler neck can also be used as a fixed (or not aufklappbarer

Filler neck) formed and z. B. be executed as a hexagonal socket.

A device according to the invention is used for filling (and preferably also for producing and closing) open cheeks which are preferably provided with gussets. The device according to the invention is provided in particular for carrying out the method or a method described above. The device according to the invention comprises a control device and a filling station having a filling nozzle for filling the open sacks with bulk goods. A plurality of grippers are provided, wherein the (plurality of) grippers are feed grippers for holding the empty open sacks when being transported to the filling station, holding grippers for holding the open sacks in the filling station and discharge grippers for holding the filled sacks at

Include removal from the filling station. It can also be provided more grippers. The device according to the invention further comprises a conveying device extending below the filling station for supporting the open sacks and for transporting and, in particular, removing the filled articles

Open-mouth bags. At the filling station, the filler neck is received together with the holding grippers on a height-adjustable carrying device. The filling station is suitable, the

Lower the support device with the filler neck and the holding grippers and lift and in particular to take over the open bag with the holding grippers. The filling station is further adapted to lower the carrying device with an offensive bag attached thereto during the filling process, so that the

Bottom of the offensive bag to start filling hanging freely above the conveyor and then then placed on the bottom of a pad.

In particular, the filling station is suitable, the

Lower the carrying device with the offensive bag hanging thereon (in particular after the beginning of filling) onto the conveying device. The device according to the invention has many advantages. A significant advantage of the device according to the invention is that a bag to be filled first to a

Filler is attached and that the filler neck after

Start of filling is moved down. At the beginning of filling, a product burst of the bulk material to be filled folds the bottom end of the product

Offensacks off. Thereafter, the opening bag is lowered during the filling, so that the bottom end of the offensive bag still stands up during filling on a base and in particular is supported by the conveyor.

Preferably, the filling station is suitable, the

Carrying device with the offensive bag hanging after the

Lower start of filling (in the direction of the conveyor on it).

Preferably, the filling station is adapted to the support

to raise device after the acceptance of a filled offensive bag and before attaching another bag to be filled to be filled.

The attachment of an offensive bag to be filled takes place in an at least partially raised position. The attachment can also be done while the filler neck is already moving down.

Particularly preferably, the filling station is suitable, the

Carrying device with the offensive bag hanging after the

Lowering the start of filling, so that the bottom end of the open sack at least in a part of the filling process on the

Conveyor rests.

In preferred embodiments, the control device and the filling station are designed and set up to

- To raise the support means with the filler neck and the holding grippers to take over the opening bag with the holding grippers in the preferred raised position, so that the bottom end of the offensive bag to start filling depends freely above the conveyor; - To leave the support means raised with an offensive bag attached thereto, so that the bottom end of the offensive bag (at the beginning of the filling process) hanging freely above the conveyor;

- Lower the support device with an offensive bag attached thereto, so that the bottom end of the offensive bag rests on the conveyor at least during part of the filling process.

The conveyor preferably has a run around (at least two) pulleys. Such a dream is

especially designed as a conveyor belt. However, a strand can also be designed as a conveyor chain, slat belt or conveyor belt or the like.

Particularly preferably, at least one compression device is included. Preferably, the compression device is arranged on the conveyor or received therein. Preferably, the compression device is arranged below a support surface of the conveyor. The compression device is in particular designed to act on the (or a part of) the support surface of the conveyor (and thus on a raised bottom of a bag Sackensacks). The compacting device acts in particular directly on the run of the conveyor. But it is also possible that the compression device acts indirectly on the strand and thus the support surface of the conveyor, or acts through the strand directly on the bag bottom. This can z. B. in linear or strip-shaped funding such as belts or z. B. chains can be realized. The

Compression device then preferably acts in the free spaces between the conveying means, in particular directly on the bottom end. In this case can be applied to the conveyor driver at predetermined intervals.

The filling station preferably comprises a drive for raising and lowering the carrying device. About the drive of the filler neck and the holding grippers are raised or lowered. In all embodiments, it is preferred that the feed grippers and the removal grippers (and preferably further grippers) are fastened to a support frame of a transport device. The

Transport device can be designed as a linear transport. Preferably, the transport device comprises pendulum arms and a pendulum drive. This will be a Vorschwenken and a

Swiveling the support frame back one stroke (pendulum stroke)

allows. In a symmetrical pivoting, the support frame is in the vorwenkten and the

pivoted back position in each case at the same height, so that in this way a simple linear transport is provided, in which at the distance of the pendulum stroke a plurality of

can be provided consecutively connected processing stations.

Preferably, the open bag is attached to the filler neck via a pendulum movement of a pendulum unit. With the

Pendulum movement of the open bag is pivoted from a lower position to the filler neck upwards. In this case, a movement takes place with a horizontal and a vertical component. The pendulum unit may be attached to the support frame of the transport device, but may in particular also be attached separately therefrom. The Voröffnungsstation or Sackvoröffnungsstation is particularly associated with the pendulum unit for attaching the Offensacks.

Preferably, the Sackvoröffnungsstation is in the

Oscillation with pivoted.

A processing station can be designed as a bag formation station and a further processing station can be designed as a bag opening station or bag opening station. Regularly is one

Filling station provided. At the filling station can be a

Connect the head seam station and, if necessary, a cooling station for the top seam. Finally, the filled open bag is removed. In preferred embodiments, the

Filler neck formed as a valve neck and is particularly suitable to immerse in a (pre-opened) open bag. In all embodiments, it is preferred that the

Height adjustable conveyor is to be adapted to different bag dimensions. It is not necessary to adjust the height of the conveyor for each individual open bag to be filled. It is also not possible to

Lower conveyor at clock speeds of 2000 open sacks and more at each open bag and start again.

In preferred embodiments, a roll receptacle for

Receiving at least one tubular film roll comprises.

In particular, a bagging station for the formation of

Open sacks of tubular film provided.

Preferably, a bottom seam station for producing a bottom seam and / or a top seam station for closing the offensive bag are included. At least one cooling station may be included for cooling a closing seam. In this case, such a closure seam may be a bottom seam or even a top seam and, in particular, be designed as a welded seam. For this purpose, preferably welding jaws are present.

Further advantages and features of the present invention will become apparent from the embodiments, which are explained below with reference to the accompanying figures.

In the figures show:

Figure 1 shows the device according to the invention in a schematic

Side cross-section in a first position in the formation of an open sack;

FIG. 2 shows the device according to FIG. 1 in a second position after the attachment of an open sack;

FIG. 3 shows the device from FIG. 1 in a third position;

Figure 4 is a highly schematic horizontal cross section through the filling station; Figure 5 is a side view of another filling station; and

FIG. 6 shows the device according to FIG. 1 in a fourth position;

Figure 7 is a schematic view of a pendulum unit with a

Pre-opening station.

FIGS. 1 to 4 each show the same device in a schematic lateral cross section in different positions or states. In this case, components and parts of the real device have been omitted in all figures in order to facilitate the overview. Although Figures 1, 2, 3, 6 and 7 show the same

Device, but it is not all components shown in all figures and there are not all reference numerals in all figures.

The device 1 shown in FIGS. 1, 2, 3 and 6 serves for filling bulk materials into open sacks 2. The open sacks 2 are preferably produced in a sack formation station 27 of the device 1. For this purpose, the device 1 comprises a roller receptacle 24 for a tubular film roll 25. Die

Roller receptacle 24 may be mounted on the device 1 or placed separately in front of it.

About different and here only very schematically illustrated pulleys 31 is not shown here in detail buffer provided to a continuous as possible unwinding of the tubular film roll 25 to

enable. But it is also possible that prefabricated

Open sacks of the device 1 are supplied.

The device 1 comprises a frame 40 on which the

various components of the device 1 are mounted. At the bag forming station 27 is a bottom seam station 29th

arranged here, which comprises two welding jaws 41, which introduce a bottom seam in the supplied tubular film 32. After further indexing of the tubular film 32 by one sack length, the sack is cut at the head end with the cutting blade 33 (see FIG cut so that a separate to be filled Offensack 2 is available. The open bag 2 is held by gripper 10 (empty bag gripper). Meanwhile, the bottom seam of the offset bag 2 can be cooled at the cooling station 28, so that the bottom seam the required stability for the amount of

having to be filled product.

The bag forming station 27 close different

Processing stations, including in particular the

Pre-opening station 39, the filling station 5, and the

Kopfnahtschweißstation 42 with welding jaws 41. The transport of the open sacks 2 between the individual stations (5, 27, etc.) via a transport device 20, which transports the open sacks 2 as a result linearly or horizontally through the device 1. The transport device 20 comprises a

Support frame 21, on the different sets of grippers 10th

are mounted. The support frame 21 is held by two pendulum arms 22 between two pivotal positions pendulum. To drive the transport device 20 is a pendulum drive 23 in the form of an electric motor, via an eccentric 19 the

Oscillation between a forward and a

pivoted back position of the support frame 21 allows. The filling station 5 comprises a drive 18 for raising and lowering the carrying device 8.

A separate pendulum unit 44 may be connected upstream, to which the pre-opening station 39 and feed gripper 11 are attached. The pre-opening station 39 opens the open sacks and hangs by a pivoting movement the pre-opened open sacks

successively from below to the filler neck 6. In this case, an open bag is moved in the horizontal and in the vertical direction.

In the pre-pivoted position shown in FIG. 1, the drawn open sack 2 can be attached following the filler neck 6, which is embodied here as a flap nozzle 26. By Zufuhrgreifer 11 is previously in the

Sack forming station 27 formed Offensack taken from the feed grippers 11 and then opened. Thereafter, the open bag 2 is then transported from the bag forming station 27 to the next station. After the bag forming station 27, a further cooling station 28 may be arranged. At the Voröffnungsstation 39, the head end 30 of the Offensacks 2 by means of z. B. suction pads (pre-) is opened. By a pendulum movement of the pendulum unit 44 (see Fig. 7), the

Filling station 5 is reached, as shown in Figure 2.

The feed gripper 11 and the pre-opening station 39 can be used in all configurations (as shown in FIG

Embodiment) be identical. In another variation, first feed grippers 11 first bring the empty bag into a further cooling station 28 and the pre-opening station 39 takes over (as further or with further feed grippers 11) with the

Pendulum stroke the empty bag and leads him pre-opened in the transfer position of the filler neck. 6

In the position shown in Figure 2, the pre-opened open bag 2 is below the filler neck 6. Das

The bottom end 9 of the offset bag 2 hangs above the base 45 (see Fig. 3) and here the conveyor 7. The filler neck 6 is located in those shown in Figures 1 and 2

Positions in a raised position.

The conveyor 7 is arranged to adjust and adjust different bag lengths via a height adjustment 38 height adjustable on the frame 40. The conveyor device 7 is not moved at each filling in height, which allows a much simpler drive and a much simpler version of the height adjustment.

Optionally, the conveyor 7 can also be arranged separately on the floor. The conveyor 7 comprises a strand 15, which is designed in particular as a conveyor belt. The surface of the strand 15 forms here a support surface 17 for example, filled open sacks. 2 The strand 15 is deflected by pulleys 14. To drive an electric motor 37 are used.

The conveyor 7 extends below the

Filling station 5 and also below the filler neck 6, in such a way that a recorded on the conveyor 7 or arranged compacting device 16 is also in

vertical direction below the filler neck 6 is located.

The compression device 16 is in such a case on the

Conveyor 7 recorded that the compression device 16, when it is active, on the upper strand 15 of the

Conveyor 7 and on the support surface 17 of the

Conveyor 7 acts. This makes it possible that (after lowering the filler neck) on the

Conveyor 7 upstanding open bag 2 and a supported by the conveyor 7 open bag 2 with the

Compressor 16 is processed. As a result, the bulk material in the open sack 2 can already be during the

Filling be compacted.

But first, the open bag 2 is attached to the flap nozzle 26, as Figure 2 shows. In the at least also at least relatively upward attachment process the tips of the valve body already dive into the pre-opened

Head end of the offset bag 2 a. Likewise assume the holding gripper 12 not visible in Figure 2 in the area of

Gussets of the offensive sack 2 the open sack, so that the gripper 10 can release on the pendulum unit 44 to be filled the open bag 2. The bottom end 9 of the offensive bag 2 to be filled does not lie on the conveyor 7. This is important so that the bottom end (always) unfolds cleanly at the beginning of the filling.

This is achieved because before the start of a filling or after the end of a previous filling, the carrying device 8 is moved with the filler neck 6 and the holding grippers 12 in the raised position 34 shown in Figures 1 and 2. This will the distance to the conveyor 7 is so great that the bottom end 9 of a subsequently attached offensive bag does not come into contact with the conveyor 7. There is, however, at least one (small) gap between the bottom end 9 of the offensive bag 2 to be filled and the support surface 17 of the conveyor 7. At least the degree of freedom of the bottom end 9 is so large that the floor with the first incoming product (product shock) free can unfold.

In Figure 3, the flap pipe 26 is further opened, so that the filling process can start. The flap pipe is located together with the support means 8 and the holding grippers 12 in the raised position 34. The support means 8 is still in the raised position 34. The bottom end 9 of the offset bag 2 is suspended.

Following the filling process is started, with bulk material is passed into the open bag 2 inside. The timing is carried out in this case (in particular on the basis of empirical values) in such a way that the product impact first entering the open sack 2 covers the bottom end 9 of the offensive sack 2 (if possible

wrinkle-free) unfolds. Schematically, a folded out

Bottom end 9a shown in dashed lines in Fig. 3.

In a coordinated manner, a lowering of the carrying device 8 can be initiated subsequently or beforehand, so that the bottom end 9 of the offensive sack 2 is supported by the conveying device 7 as quickly as possible after the bottom end 9 of the offensive sack 2 unfolds. This makes it possible for the compacting device 16 accommodated there to act on the bottom end 9 of the offset bag 2 and to effectively compact bulk material already contained therein during the filling.

Figures 4 and 5 show two variants of the arrangement of

Holding gripper 12 on the support means 8 of the filling station 5. In this case, Figure 4 shows a horizontal cross section through the

Filling station with the schematically shown

Filler 6, to which an open bag 2 is attached. Of the Filler and also the holding gripper 12 are held by the support means 8. The holding grippers 12 are shown here in the closed state and grip the gussets 3 of the offset bag 2 to the open bag 2 in the filling process

to keep defined. Dashed is also a

Holding gripper 12 in the open position. It must be the

Holding gripper 12 are pivoted so far outward that a to be filled open bag between the holding grippers 12 removed (and transported) can be.

FIG. 5 shows another variant in which the holding grippers 12 are not vertical but horizontal axes 36

are pivotable. The holding grippers 12 are within the

Carrying device 8 pivotally and serve in turn for

Seizure of the gusset areas 3 of the open sack 2. Again, the open sack 2 is added to the filler neck 6 again.

Finally, FIG. 6 shows a schematic lateral cross section of the device from FIG. 1, wherein a filled open sack 2 is drawn in a schematic manner.

The lowered position 35 shown in FIG

Supporting means including filler neck 6 and holding grippers 12 is taken shortly after the start of filling, so that the bottom end 9 of the open bag 2 to be filled can already be processed by the compacting device 16 during a substantial part of the filling process, in order to effect an effective compression of the bulk material to be filled.

After completion of the filling process, the filled open bag is closed and transported away by the conveyor 7. The filler neck 6 and the support device including the

Filler 6 is moved up to the raised position 34, so when attaching the following to be filled

Offensacks 2 whose bottom end 9 again freely above the

Conveyor 7 depends. FIG. 7 shows a highly schematic side view of the pendulum unit 44 with the pendulum unit 44 attached thereto

Voröffnungsstation 39. In the dashed position is also shown in dashed lines open bag 2 in a lower position and is here already from the

Pre-opening station 39 has been pre-opened. With a pivoting or pendulum movement, the pre-opened open bag 2 is here pivoted to the right and up, so that the pre-opened open bag 2 is slipped over the filler neck 6 from below. Relatively speaking, the filler neck 6 dives from above into the pre-opened open sack 2. By opening the valve body is the

Open bag 2 then fully open.

Since it is in the illustrated device to a

High-performance machine, in which up to 2600 open sacks and more can be produced and filled per hour, the cycle time per clock is only slightly more than 1 second. As a result, only a period of time of less than 1 second is available for the actual filling process. Therefore, effective and early compression is of considerable benefit.

Overall, the device according to the invention and the method according to the invention offer great advantages, since in a simple manner by a single and per cycle "simple

Stutzenanhebung "a much more effective filling of

Bulk goods in open-mouth bags with less effort is possible.

The conveyor can and should be placed below the filler neck so that there arranged

Compressing device acts on the bottom end of the opening bag already during the filling. It is not necessary for that

Execute conveyor belt hinged, as is the prior art. It is sufficient to lift the filler neck with the attached open bag again and start the filling process. During the filling process, the opening bag is lowered back onto the conveyor and the compacting device contained therein. It has even been found that the drive for lifting the filler neck including the holding gripper does not need to be made stronger than the drive for lifting the filler neck, the has been used until now, although now the support means 8 holds not only the filler neck 6 and the empty open bag 2 during the filling process, but also a considerable amount of bulk material before the partially filled open bag is turned off on 2 of the conveyor 7.

Furthermore, pusher flaps are no longer needed to pull off the open bag 2 from a separate vibrator. As a result, the drive for the transport device is no longer so heavily loaded. The drive for the conveyor 7 does not have to be designed stronger, as previously a filled bag had to be accelerated.

As bulk materials preferably granules are filled. But it is also possible to use cement or similar products with the

to fill the device according to the invention.

Another advantage is that a separate drive for lifting and lowering a compacting device is no longer necessary. It is not necessary for the compacting device to operate

raise and lower again.

It is also advantageous that the compression device can be integrated in the conveyor or in the Sackaustrageband and can be positioned there directly under the upper strand. A significant advantage is that the conveyor is designed to be static overall and there is no fold-down share.

List of reference numbers:

1 device 23 pendulum drive

2 open bag 24 roller intake

3 gusseted 25 tubular film roll

4 control device 26 flap nozzle

5 filling station 27 bagging station

6 filler neck 28 cooling station

7 conveyor 29 bottom seam station

8 Carrying device 30 head end

9 bottom end 31 pulley for 32

9a unfolded bottom 32 tubular film

10 grippers 33 cutting blades

11 feed gripper 34 raised position

12 holding gripper 35 lowered position

13 discharge gripper 36 fulcrum of 12

14 pulley for 15 37 drive for 7

15 strand 38 height adjustment of 7

16 compacting device 39 pre-opening station

17 support surface 40 frame

18 drive for 8 41 welding jaw

19 eccentric 42 top weld welding station

20 Transport device 44 Shuttle unit

21 supporting frame 45 underlay

22 pendulum arm

Claims

Claims :

A method of filling bulk materials in open sacks (2), comprising the following steps:

a) an open sack (2) is attached by an at least partially upward movement from below to a filler neck (6) of a filling station (5), so that the bottom end (9) of the open sack (2) hangs freely;

b) the filling process is started and bulk material is introduced into the open sack (2) so that the free-hanging bottom end (9) of the open sack (2) unfolds;

c) the filler neck (6) is lowered, so that the unfolded bottom end (9a) of the offensive sack (2) rests on the bottom.

2. Method according to the preceding claim, wherein the

Filler (6) is lowered with the attached open bag (5) on a conveyor (7).

3. The method according to claim 1 or 2, wherein the bottom end (9) of the offensive sack (2) during at least part of the

Filling process is supported.

4. The method according to any one of the preceding claims, wherein the method step c) is carried out during the filling process.

5. The method according to any one of the preceding claims, wherein the bulk material in the on the conveyor (7) standing open bag (2) is compressed during the filling process.

6. The method according to any one of the preceding claims, wherein in the process step a) holding gripper (12) take the open sack (2) and lowered in the method step c) together with the filler neck (6).

7. The method according to any one of the preceding claims, wherein after the filling and process step c) the holding gripper (12) release the open bag (2) and together with the filler neck

(6) are raised while the open bag (2) on the conveyor (7).

8. The method according to any one of the preceding claims, wherein the open sack (2) after the filling end by means of the conveyor

(7) is transported on.

9. The method according to any one of the preceding claims, wherein the open sack (2) in the further transport at the head end (30) by discharge gripper (13) is guided.

10. The method according to any one of the preceding claims, wherein the open bag (2) is formed before attaching from a tubular film (32).

11. The method according to the preceding claim, wherein the

Tubular film (32) is unwound from a film roll (25) and first a bottom seam (9) is introduced into the tubular film (32) and wherein the tubular film (32) is then transported by a cycle length and wherein the tubular film (32) at the head end ( 30) is cut off to form an open sack (2).

12. The method according to any one of the preceding claims, wherein the head end (30) of the Offensacks (2) is pre-opened prior to attachment to the filler neck (6).

13. The method according to any one of the preceding claims, wherein the formed as a valve neck filler neck (6) and in the pre-opened head end (30) immersed flap opening unfolds and further opens the headboard.

14. Device (100) for filling preferably with

Gussets (3) provided with open sacks (2),

with a control device (4) and a filling station (6) having filling station (5) for filling the open sacks (2) and with a plurality of grippers (10),

wherein the grippers (10) have at least feed grippers (11) for holding the empty open sacks (2) when they are transported to the filling station,

Holding gripper (12) for holding the open sacks (2) in the

Comprising filling station (5) and removal gripper (13) for holding the filled open sacks (2) during removal from the filling station (5),

and with one below the filling station (5)

extending conveyor (7) for supporting and for transporting the filled open sacks (2),

characterized,

that at the filling station (5) of the filler neck (6) together with the holding grippers (12) on a height-adjustable

Carrying device (8) is included,

and that the filling station (5) is adapted to the

Carrying device (8) with the filler neck (6) and the

Lower and raise holding grippers (12),

and that the filling station (5) is adapted to the

Lower the support device (8) with an open bag (2) attached thereto during the filling process, so that the bottom end (9) of the open bag (2) initially clear above the

Conveyor (7) hangs and then down on one

Pad is placed.

15. Device (1) according to the preceding claim, wherein the filling station (5) is adapted to the support means (8) with the hanging thereon bag (2) on the

Lower the conveyor (7).

16. Device (1) according to the preceding claim, wherein the filling station (5) is adapted to lower the carrying device (8) with the offensive bag (2) hanging thereon after the start of filling, so that the bottom end (9) of the open bag (2) at least for a part of the filling process on the

Conveying device (7) rests.

17. Device (1) according to one of the three preceding claims, wherein the control device (4) and the filling station (5) are designed and arranged to

- Lift the carrying device (8) with the filler neck (6) and the holding grippers (12) to take over the open bag (2) with the holding grippers (12) in the raised position, so that the bottom end (9) of the open bag (2) at the start of filling, hanging freely above the conveyor (7),

- The support means (8) with an attached thereto

Lower the open bag (2) so that the unfolded bottom end (9) of the open bag (2) is supported from below during the filling process.

18. Device according to the preceding claim, wherein the

Control means and the filling station are adapted and adapted to lower the support means with an offensive bag attached thereto, so that the bottom end (9) of the offensive sack (2) rests on the conveyor (7), in particular at least in part of the filling operation.

19. Device according to one of the five preceding claims, wherein at least one compression device (16) is included and / or wherein a compression device (16)

below a support surface (17) of the conveyor (7) is arranged.

20. Device according to one of the six preceding claims, wherein the filling station (5) comprises a drive (18) for raising and lowering the carrying device (8).

21. Device according to one of the seven preceding claims, wherein the feed gripper (11) and the discharge gripper (13) on a support frame (21) of a transport device (20) are attached.

22. Device according to one of the eight preceding claims, wherein the transport device (20) comprises pendulum arms (22) and a pendulum drive (23).

23. Device according to one of the nine preceding claims, wherein the open sack (2) via a pendulum movement of a

Pendulum unit (44) is attachable.

24. Device according to one of the ten preceding claims, wherein the filler neck (6) is designed as a flap nozzle (26) which is adapted to an open sack (2).

immerse and / or wherein a roller receptacle (24) for receiving a tubular film roll (25) is included and / or wherein a bag forming station (27) is included and / or wherein a bottom seam station (29) for generating a

Bottom seam and / or a Kopfnahtstation for closing the Offensacks (2) is included and / or wherein at least one cooling station (28) is included for cooling a sealing seam.