DE29506139U1 - Filling device for packaging, in particular paper sacks - Google Patents

Description

PATENT ATTORNEYS \. ^: \. ^: ' ^: §^^\^ _L if|^ ^{SSE 20}

DIPL.-ING. BODO THiELKING phone.· cos so

DIPL.-ING. OTTO ELBERTZHAGEN fax: (0521) 173725

TELEX: 932059 attorney d

POSTAL ACCOUNT HANNOVER
(Bank code 25010030) 3091 93-302

ATTORNEY FILE: ]_ 7 2 6Ca

DATE:

05.April 1995

Applicant: Icoma Packtechnik GmbH

Fautenbacher Strasse 26, 77855 Achern

Filling device for packaging, especially paper bags

The invention relates to a filling device for packaging, in particular paper bags, according to the preamble of claim 1.

Such filling devices are known in different designs. In all known designs, the weighed filling material is drained into the packaging through a filling funnel in a filling station. This is followed by compaction. The filling funnel must not emerge from the packaging until the upper edge of the initially uncompacted or only partially compacted filling material has reached a sufficient distance from the upper edge of the packaging.

In the known filling devices, the time limiting the filling speed is the time that elapses between the sinking of the filling material from the uncompacted state until the surface of the filling material sinks to a sufficient distance below the upper edge of the packaging.

17 260 a 05 April 1995

With all filling devices known to date, this period cannot be significantly shortened. The only possibility of reducing this period so far is to use the most intensive possible compaction processes by shaking and simultaneous vacuum suction.

The only other way to shorten the time period mentioned is to produce the packaging with excess length so that the filling funnel can be pulled out of the packaging as soon as possible. The initially uncompacted filling material is at a much higher level than after compaction. This results in unused areas of the paper sack or paper bag that later have to be cut off again in a separate operation. In this way, material is wasted and a delay occurs due to an additional processing step, namely the cutting process.

Based on this state of the art, the invention is based on the object of developing an invention of the type assumed to be known in such a way that it enables a shortening of the total filling time without increasing the packaging height.

This problem is solved with the features of the characterizing part of claim 1.

By dividing the filling funnel, which has a filling nozzle that protrudes above the packaging, it is possible to fill the filling material to a height above

17 260 a ⁰⁵ - April 1995

—3—

to fill the container from above the edge of the packaging and to allow the filling nozzle, which protrudes above the edge of the packaging, to run through various stations in which the required compaction of the filling material to a level below the edge of the packaging is possible.

The filling nozzle, which can be coupled to the top of the filling funnel and which together with the top of the filling funnel forms the entire filling funnel, remains from an opening station conveniently arranged upstream of the filling station, in which it is inserted into the empty packaging, to a transfer station within the packaging.

Only in the filling station is the filling nozzle attached to the top of the filling funnel during the filling process, preferably in a dust-tight manner.

Preferred embodiments of the invention emerge from the further subclaims.

A preferred embodiment of the invention is described in detail below with reference to the drawing. They show:

Figure 1 - a schematic plan view of the arrangement of various processing stations,

Figure 2 - a schematic side view of two opposite stations, namely a transfer station and a filling station with transport device for translating the filling nozzle,

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05.April 1995

Figure 3 - the filling station with scale, with the filling material still in the scale and the filling funnel top not yet attached to the filling nozzle,

Figure 4 - the illustration according to Figure 3 with the filling funnel upper part lowered and attached to the filling nozzle, where the filling material has already been emptied into the filling nozzle,

Figure 5 -

Figure 6

Figure 7 Figure 8

a pre-compression station downstream of the filling station, in which the filling material is shaken and compressed by means of a suction air connection, with the suction air device in its upper, inactive position,

the representation according to Figure 5 with lowered suction air device in the pre-compressed state of the filling material,

a post-compaction station with raised vacuum suction bell,

the post-compaction station according to Figure 7 with lowered vacuum suction cup and the final filling material level.

Figure 1 shows the arrangement of the various stations arranged on a circle.

The flat side-gusseted bags 31 are provided in a magazine and fed into the opening station 1 in a pre-opened state via a transport device 32. The opening station is followed by a filling station 2, which is followed by a pre-compaction station 3. This is followed by a transfer station 4, which is followed by a post-compaction station 5.

·

From the post-compaction station, the filled packaging passes to a forming station 6 and from there to further post-processing stations 7, 8 and 9, which are used for further processing operations, in particular closing operations, but are not of interest here.

The design of the filling funnel, which is shown in a split arrangement in Figure 3, is crucial for shortening the filling time. The filling funnel has a filling funnel upper part 11a with a circumferential collar and a filling funnel lower part 11b with an upper circumferential flange. When assembled, flange 21 and collar 20 lie close to one another. The packaging 12 is located in a cassette 16 in a known manner. A base plate 17 is located inside the cassette 16. The lower sealing edge of the filling nozzle 11b presses the base of the packaging 12 onto the elastic plate 17. A vibrating device 15 is located below the elastic plate 17.

The filling funnel upper part 11a is connected via a bellows 18 to a scale 10 in which filling material 13 is located. The filling funnel upper part can be moved up or down in the direction of the double arrow 19. The filling funnel upper part 11a is connected by means of an extension arm 22b to a sliding piece 22 which can be moved on a vertical guide 23.

In the opening station, the filling nozzle 11b is inserted into the pre-opened packaging 12, which is located in the cassette 16, by means of a transport device 35.

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The transport device allows the filling nozzle 11b to be picked up from the transfer station and transported transversely to the opening station 1, which is symbolized on the schematic sliding guide by the double arrow 36. When a position aligned with the opened packaging 12 is reached (see Fig. 2), the filling nozzle 11b is lowered into the pre-opened packaging 12. The device then moves from the position shown in Figure 2 back to the position above the transfer station 4 and is thus available for picking up the filling nozzle again after the next filling cycle.

The filling nozzle 11b sunk into the packaging 12 in the opening station 1 reaches the filling station 2 together with the cassette and the packaging 12. In the filling station 2, the filling funnel upper part 11a is attached to the filling nozzle 11b in a dust-tight manner. After reaching the connection position shown in Figure 4, the filling material is ejected from the weighing container of the scale 10 through the filling funnel upper part 11a into the filling nozzle 11b. The filling level of the filling material 13 is considerably above the upper edge of the packaging 12. Shaking with a shaking device 15 already leads to a slight lowering of the filling level in the filling nozzle 11b. The filling nozzle lib then enters the pre-compression station 3. In this pre-compression station there is a suction dome 41a, which has a collar 20 that fits onto the flange 21. There is a dust filter 25 in the suction dome. A suction air connection is marked 26 .

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05.April 1995

The suction dome 41a is connected via an arm 42a to a sliding sleeve 42, which is guided vertically on a guide rod 43. In the pre-compaction station 3, pre-compaction is carried out by means of the suction dome 41a while simultaneously being shaken by the shaking device 15. Figure 6 shows that the fill level in the pre-compaction station 3 has dropped to a level below the edge of the packaging 12. In the subsequent transfer station 4 (see Fig. 2), the filler nozzle 11 is pulled out of the packaging and moved into the opposite opening station 1.

The transfer station 4 is followed by a post-compaction station 5, which is used for post-compaction using a suction bell 27. The suction bell 27 is connected via a boom 29 a to a sliding sleeve 29, which can be moved vertically on a vertical guide rod 28. The suction bell is lowered for the suction process to the position shown in Figure 8. After suctioning with the vacuum suction bell 27, the fill level of the filling material 13 has reached its final desired height.

The filled and opened packaging then goes to a forming station 6, in which the side folds of the packaging 12 are created. In the subsequent stations 7, 8 and 9, which are outside the filling circle, additional operations are carried out on the packaging, namely folding, gluing and, if necessary, sealing. These additional stations have no influence on the design of the subject matter of the invention.

Claims (10)

1. Filling device for packaging, in particular paper bags, which has several stations (1; 2; 3; 4), with a filling station (2) which has a scale (10) and a filling funnel (11a, lib) which can be lowered into the packaging (12), characterized, that the filling funnel (11a, lib) is divided and has a filling nozzle (lib) that projects above the packaging (12), which can be coupled to the filling funnel upper part (lla) and can be taken along in the packaging (12) when passing through the stations (1; 2; 3; 4) to at least one further station (4) after the filling station (2), whereby the filling nozzle (Hb) is returned from the further station (4) to an exit station in which the filling nozzle (lib) can be inserted into the empty packaging (12). 2. Filling device according to claim 1,
characterized, that the output station is an opening station (1) arranged upstream of the filling station (2). 260 a \.··..· \,a5:;Apr£f ,1395 3. Filling device according to claim 1 or 2,
characterized, that the further station (4), from which the filling nozzle (lib) can be returned to the starting station, is a transfer station (4) downstream of the compression station (3) following the filling station (2). 4. Filling device according to one or more of claims 1 to 3, characterized, that the stations (1; 2; 3; 4; 5; 6) are arranged in a closed circuit. 5. Filling device according to claim 4,
characterized, that the stations (1; 2; 3; 4; 5; 6) are arranged on a circle and the starting station and the transfer station (4) are diametrically opposite each other. 6. Filling device according to one or more of claims 1 to 5, characterized, that the opening station (1), in which the filling nozzle (lib) enters the packaging (12), is followed by the filling station (2), in which the weighed or measured filling material (13) is let into the packaging (12) through the filling funnel (11a, 11b), the filling station (2) being followed by at least one compression station (3), with additional compression also taking place in the transfer station (4) and optionally one or more further stations (5; 6). 260 a 05 April 1995 7. Filling device according to claim 6,
characterized, that the post-compression station (5) downstream of the transfer station (4) has a vacuum post-compression device. 8. Filling device according to one or more of claims 1 to 1 ₁ characterized, that the filled packaging (12) in the form of a side-gusseted bag passes through a further forming station (6) provided between the post-compaction station (5) and the opening station (1) to re-form the side folds above the filling level, the packaging (12) leaving the circuit of the filling device from this forming station (6) and further processing stations (7; 8; 9) for closing the filled side-gusseted bag (12) follow. 9. Filling device according to one or more of claims 1 to 8, characterized, that the transport of the packaging (12) takes place by means of a turntable (14). 10. Filling device according to one or more of claims 1 to 9, characterized, that storage spaces for the packaging (12) on the turntable (14) have vibrating devices (15). · · t