DE8910081U1 - Filling machine for filling open bags - Google Patents

Description

1 - Patent attorneys

Dr. Loesenbeck (i98o>

DipWng. Stracke Dipl.-Jng. Loesenbeck

Jollenbecker Str. 184.4800 Bielefeld

18/12

Haver & Boecker, Carl-Haver-Platz, 4740 Oelde 1

Finirnascnir.·-" mm filling before open socks

The present innovation relates to a filling machine for filling open bags with a filling nozzle to which the bags to be filled can be attached and with a vertically movable, tubular and air-permeable probe which can be connected to a vacuum generator by means of a piece of pipe in order to suck out air trapped in the filling material.

The filling machine in question is particularly suitable for fine-grained or powdery bulk materials. In order to reduce the bulk material volume Q, it is necessary that the bag contents formed from the filling material are This compaction results in further advantages, such as better stackability etc. The filling machines known to date are therefore partly equipped with a vibrating device. The vibrating parts of this vibrating device act on the bag from the outside. The vibrating device is a horizontal vibrating table on which the bag stands. The contact surface between the vibrating table and the bag is relatively small in relation to the total external surface of the bag. The vibrations of the vibrating table are transferred to the particles of the filling material, so that relative movements occur between the filling material particles, whereby the air filled cavities can be reduced. However, this requires

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that air can escape. This occurs, for example, via the free bulk material surface and also through the bag walls.

From a settling, preferably shaken, bed, the air generally escapes from the upper part of the bag, which is furthest away from the shaking device associated with the bottom of the bag. The resulting compression, ie reduction of the free flow cross-sections or the hollow volume in the upper part of the bed, makes it difficult for air to escape, so that an air cushion with a small overpressure ^is created in the lower part. The reduction of this air cushion by shaking takes an undesirable amount of time during the filling process. The deaeration and compaction treatment of the filling material in the bag can therefore become the determining factor for the duration of a filling process and thus the throughput of a filling machine or the amount of

Bags have a significant impact.

This aforementioned circumstance is also due to the fact that damping occurs when the vibrations are transferred from the vibrating device to the filling material particles. To improve the air removal, it has already been suggested to install a A tubular, air-permeable probe is inserted, which extends essentially over the entire length or height of the bag. This probe is connected to a vacuum pump. By combining a vibrating device acting on the bag from the outside with the vacuum probe, sufficient compaction is achieved for many filling materials. However, there are powdered filling materials, such as milk powder, where problems arise. The aim of this innovation is to further develop a filling machine of the type mentioned above so that the venting can be carried out in a shorter time with little construction effort, which then leads to high-performance Increasingly, this results in shorter cycle times and a stronger compaction of the filling material.

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The task is solved in accordance with the innovation by a vibration exciter that sets the probe in oscillating movements. In the innovative filling machine, the probe for extracting the air is also the vibrating device at the same time. The oscillating movements are therefore transferred from the inside of the bag to the filling material particles. The distance between the vibrating probe and the filling material particles is therefore significantly smaller than in the known filling machines and remains the same over the entire length or hem of the bag. The probe is located in the area of the central longitudinal axis of the bag. The relative movements of the filling material particles that cause compaction are significantly more intense, so that compaction is correspondingly stronger and takes place more quickly. Due to the relatively small distance between the vibrating probe and the bulk material particles that are furthest away, damping can no longer be detected. In addition, the vibration energy generated by the vibration exciter can be introduced into the bulk material with less loss or less damping. With the previously known vibrating tables, a loss of energy was observed because the bag did not follow the vibrating movement of the vibrating table due to the inertia of the masses. The vibration exciter works with a relatively high frequency, which can be in the range of 200 Hz, for example. Another advantage is that the risk of clogging is significantly lower due to the vibrating movement of the probe.

The vibration exciter can be commercially available and operated with electrical, for example magnetic energy or with compressed air. So that it does not have to be pulled through the filling material when the probe is pulled out of the bag interior, it is advisable to arrange it in the upper area of the probe. A compact design of the preferably tubular probe is achieved if the vibration exciter is arranged inside the probe. The probe is attached to a piece of pipe to which a line leading to the vacuum pump is connected. It is also conceivable that the vibration exciter is arranged on this piece of pipe, since the vibration

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transmitted.

The innovation is explained in more detail with reference to the accompanying drawings, which show a preferred embodiment. They show:

Fig. 1 the lower part of a filling machine according to the innovation in

crack,

Fig. 2 shows the upper part of the filling machine in elevation. Fig. 3 shows the probe of the new filling machine as a detail.

The filling machine shown in the figures includes a filling nozzle 10 to which the bags 11 to be filled are connected in a manner not described in detail. Before the filling begins, a probe 12 that can be moved vertically is inserted into the respective bag 11. The front ends of the probe 12 are located at a relatively short distance from the bag edges. The probe 12 consists of a support body 13 that is made from a piece of pipe and with openings shown in more detail. A rotationally symmetrical probe is shown in the figures. Other cross-sectional shapes are also possible. A filter fabric 14 is pulled around the support body 13. The lower end of the probe 12 is closed by a welded-in tip 15. The upper end has a provided connector 16, into which a pipe section 17 is screwed. In the upper area of the probe 12, a vibration exciter 18 is attached to the outer surface in a manner not explained in detail. The form shown offers the advantage of particularly simple assembly. To avoid

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However, in order to avoid protruding parts, it is advantageous if the vibration exciter 18 is arranged inside the support body 13. Figure 3 also shows an embodiment in which the vibration exciter designated 18' is attached to the pipe section 17. The vibration exciter 18 is then omitted.

/-■ In a manner not shown, it is conceivable that the probe

12 is designed as a Y-pipe. This makes the vibration of the filling material, which leads to compaction, particularly intensive. This design can be seen as if two probes shown in Figure 3 were coupled together. However, it is also conceivable that more than two individual probes are connected to one another. The number of individual probes depends on the width of the bag.

The filling nozzle 10 of the filling machine shown can be moved in the vertical direction, as can be seen from Figure 1. For this purpose, a guide rod 20 is provided on the machine frame 19, on which a roller connected to the filling nozzle 10 ^] The bag 11 to be filled supports

rests on a height-adjustable table 21. Figure 2 shows the discharge funnel 22 located above the filling nozzle 10, the outlet opening of which can be closed by a dosing cone 25. The pipe section 17 screwed into the probe 12 extends into the funnel 22. Above the The scale 23 is located in the funnel 22. The filling material is first poured from the scale into the discharge funnel 22. In the area of the scale 23, a drive 24 designed as a belt drive is provided for the height adjustment of the probe 12. The two axes of the drive 24 are located one above the other and run horizontally. zontal direction. The connection between the pipe section 17

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for the vacuum pump not shown. For the sake of simplicity, it is not shown in the figures.

Claims (1)

• » &psgr; · · ■ Haver & Boecker, Carl-Haver-Platz, 4740 Oelde Protection claims &Ggr; 1. Filling machine for filling open bags with a filling nozzle to which the bags to be filled can be attached and with a vertically movable, tubular probe which can be connected to a vacuum generator by means of a pipe section for extracting air trapped in the filling material, characterized by a vibration exciter (18 or 18') which sets the probe (12) in oscillating movements. 2. Filling machine according to claim 1, characterized in that the vibration exciter (18) is arranged in the upper region of the probe (12). ^ 3. Filling machine according to claim 2, characterized in that the vibration exciter (18) is arranged on the outer surface of the probe (12) or in the interior of the probe (12). 4. Filling machine according to claim 1, characterized in that the vibration exciter (18 ¹ ) is arranged on the pipe section (17) inserted into the probe (12). Haver & Boecker - 8 - 5. Filling machine according to claim 1, characterized in that the probe (12) is formed from several individual sensors that are conductively connected to one another. 6. Filling machine according to claim 5, characterized in that the probe (12) is formed from two individual probes and is designed in the manner of a Y-pipe.