WO2013079183A1 - Filling device for a packaging machine - Google Patents

Abstract

The invention relates to a filling device (1) for a packaging machine and to a packaging machine having a filling device that includes a filling channel (2) and a controllable channel closure (3) in order to control the flow through the filling channel of a bulk material (5) to be filled into a valve sack (4). The channel closure comprises a pivotable closure element (6) which is arranged within the filling channel and the pivot axis (7) of which extends transversely with respect to the filling channel in such a way that, when closed, the channel closure completely closes the filling channel and, when fully open, completely opens the filling cross section.

Description

 Filling device for a packing machine

description

The present invention relates to a filling device for a packing machine and one with at least one

Filling device equipped packing machine for filling

Bulk goods in valve bags. The inventive

Filling device can be used for filling of bulk materials of all kinds. Particularly preferred are such

Filling device and a packaging machine equipped therewith used for filling fine products, ie for filling fine and dusty products, such as cement.

In the prior art, a variety of filling devices have become known which have a filling channel and which have at least one controllable channel closure in order to control the flow of a bulk material to be filled into a valve bag through the filling channel. It is known in

Filling devices often spent the channel closure in two or three different positions to release the filling channel to a different proportion. Will the

Channel closure wide open and the cross section of the

Filling largely released, so the filling is done in coarse flow, in which a high filling weight per unit time is filled.

In order to be able to control the filled quantity or the filled volume in a targeted manner, the filling rate towards the end of the

Filling process lowered and subsequently filled only in fine flow. For this purpose, the cross section of the filling channel is considerably reduced by the controllable channel closure. When the filled capacity or the desired filling volume is reached

CONFIRMATION COPY is, the channel closure is completely closed, so that the filling process is stopped.

With GB 416,215 a packing machine with a valve in the filling channel has become known, the valve extending at a position transverse to the longitudinal extent of the filling channel

Valve axis is received pivotally. The valve comprises a round-shaped closure plate, which is pivotable via the valve axis provided centrally thereon. The

pivotable valve axis runs centrally through the

Filling channel. In a vertical position closes the

Closure plate the circular formed filling channel. After pivoting 90 ° in a horizontal position of the filling channel is largely released. Both the pivot axis and the closure plate are in the open state in the middle of the product flow. In the filling of bulk solids rubbing contact with the product to be filled therefore causes a continuous and high wear on the

Pivot axis and the closure plate. A correspondingly frequent maintenance and a regular replacement of the

Swivel axis and the closure plate are required. With thicker wall thicknesses, the service life can be increased, but this reduces the flow. The closure plate forms a disruptive body in the flow flow, which significantly increases the friction and the flow resistance of the bulk material.

Therefore, as a channel closure, for example

Scissor valves used in which scissor-shaped gripper fully release the elastic part of the filling channel in the open state, while the scissor gripper the

Close the filling channel partially in the fine flow position and completely in the closed position. Such a scissors valve works reliably and can cause a tight closure of the filling channel, with a high flow rate is possible. The scissor grippers are virtually no wear because they are not in frictional contact with the advised to fill product. The disadvantage of this, however, is that the channel closure must engage in the elastic part of the filling channel, so that a radially larger building

Filling device arises. In addition, the elastic tube wears due to the scissor movements and must be replaced regularly. The filling channel is longer due to the elastic hose, so that increased pipe friction occurs.

In rotary packing machines, a plurality of

Having spreading devices distributed on the circumference, this leads to a larger diameter of the packing machine and thus a larger volume.

A small volume and a smaller overall length are achieved via a slide valve. In such a channel closure, a pivotally mounted slide plate is received between two other steel plates. Through the three adjacent steel plates, the filling channel extends. The pivot axis of the middle and the filling channel selectively releasing

Slide plate extends parallel to the filling channel. Due to the eccentric pivoting movement of the filling channel is initially partially and finally completely closed, so that a defined control of the filling process is possible.

To seal the three steel plates they are through

Spring preload pressed against each other, so that a sufficient seal to the outside. Such a channel closure works reliably and requires only a small

Space in the direction of the filling channel. The sliding steel plates are subject to continuous wear. The wall thickness of the slide plate can be increased accordingly to increase the service life. Nevertheless, the individual steel plates must be replaced in maintenance intervals, resulting in downtime. In addition, this creates installation effort. Another disadvantage is that product is transported in the course of operation between the steel plates to the outside. Even if this is only relatively small amounts This leads to contamination of the packing machine and the environment. A seal surrounding the gate valve would clog over time and the movement of the

Hinder slide plate.

It is therefore the object of the present invention to provide a filling device for a packing machine and a packaging machine equipped with such a filling device, wherein a high flow is possible, wherein the filling device in particular a small space requirement

and preferably a low wear is possible.

This object is achieved by a filling device with the features of claim 1 and by a packing machine with the features of claim 18. Preferred developments are subject of the dependent claims. Further advantages and features of the present invention will become apparent from the general description and the description of an embodiment.

The filling device according to the invention for a packaging machine is equipped with a filling channel and has at least one controllable channel closure in order to control the flow of a bulk material to be filled into a valve bag through the filling channel. In this case, the channel closure comprises an at least partially disposed within the filling channel pivotable closure member whose pivot axis transverse to the

Filling channel is aligned. The channel closure is structured such that the channel closure in the closed

State substantially completely closes the filling channel and completely releases the filling cross section in the fully open state in at least one central region.

The filling device according to the invention has many advantages. A significant advantage of the filling device according to the invention is the small space required, which is also achieved by the transverse to the filling channel aligned pivot axis of the closure member. At the same time a low wear is achieved. Of the Filling channel is fully released when fully opened. The closure member substantially does not protrude into the filling channel in the fully opened state. Preferably, the filling channel is completely released.

Preferably, other disturbing objects in the opened state do not protrude into the filling cross section of the filling channel.

Preferably, the pivotable closure member is pivoted in the open state completely out of the filling channel. Advantageously, the proportion of the fully releasable central area at the

Pivot axis of the closure member at least 25% of

Cross sectional area of the filling channel. Preferably, the proportion of the fully releasable central region at the Quersehnittsflache of the filling channel is at least 33% and

in particular at least 50% and more preferably

at least 66% or 75% or more. Also, a releasable proportion of 80%, 90% or 95% and more is preferred.

Preferably, in the fully opened state, the central region is completely released around a central axis and / or about an axis of symmetry of the filling channel, wherein a diameter of the exposed central region is at least half as large as the associated diameter of the filling channel.

In a preferred embodiment of the invention, the channel closure and / or the closure member comprises at least one circular section. At least one round section passes through the filling channel. Such a configuration is particularly advantageous because a round portion of the closure member at the point where the closure member passes through the filling channel, to a particularly dense and

Low-maintenance and thus low-wear construction leads. A rotational movement of the closure member relative to the wall of the filling channel leads to a much lower wear than a translational movement of the slide plates through the Bulk material through and is protected with standard seals even better against leakage of bulk material. It is possible to completely discharge the bulk material into the environment on at least one side by screwing on a cover

prevent. Should product be in the cavity between

Deposit lid and the round section, this does not hinder the subsequent pivotal movement between the round section and the lid.

In particular, the closure member is pivotable about a pivot axis, which runs centrally through the circular section. This means that the approximately trained portion of the closure member with respect to the wall of the

Filling channel is pivoted, resulting in a particularly

low-wear construction leads. This can be a high

Reliability and a long service life can be achieved.

Preferably, the channel closure is adjustable via a lever or an eccentric and a drive between a closed and at least one open position.

Preferably, the channel closure is convertible at least from a closed in at least one partially open and finally a fully open position.

It is also possible that the channel closure is continuously adjustable between an open and a fully closed position. The drive can do this

be designed differently and include, for example, an electric motor or the drive can be via a cylinder drive or include such.

In all embodiments, it is structurally preferred that the closure member projects into at least one wall of the filling channel. It is also possible for the closure member to project into or pass through the opposite walls of the filling channel. Here is the closure member

preferably at the passage points each with a round provided trained portion, so that these passage points are easy to seal to the outside. It is also possible that the closure member passes through only one wall. In the other wall, the closure member can be guided.

Particularly preferably, the closure member in the region of the interior of the filling channel on an eccentrically arranged to the pivot axis closure wall. For example, the closure wall may be formed as a wall portion of a cylinder extending over a certain angle portion. As a result, this wall section serving as a closure wall can be moved more or less into the filling channel by a corresponding pivoting movement. The shared share of the filling channel depends on the

Swivel angle of the closure member from. The pivot axis does not extend through the interior of the filling channel. The pivot axis preferably comprises two axle stubs, which are connected in the region of the filling channel by the at least one eccentric closure wall.

In particular, the closure wall is formed so that a complete closure of the filling channel in at least one angular position is possible. Preferably, a complete release of the cross section of the filling channel in at least one angular position is possible.

In all embodiments, it is preferred that the filling channel at least adjacent to the closure member in the

Has substantially rectangular cross-section. In particular, the filling channel has a substantially rectangular cross-section in at least one region and / or in at least one region downstream of the closure member.

It is also possible that the filling channel over a

essential part or over the entire length in the

Has substantially rectangular cross-section. The corners can be rounded. It is also possible that the filling channel is aligned parallel on two opposite sides, while the other two sides are formed oval or rounded.

It is also possible that the filling channel over a part of its length or a total of round or oval is formed.

Preferably, the filling channel in the region of

Closure member at least one recess in which the closure wall is at least partially disposed when the closure wall in a completely

is open position. Such an embodiment has the advantage that in the fully open position there is no additional obstacle in the filling channel. Furthermore, there are no dead spaces, which is favorable in terms of flow. Additional turbulence does not occur.

It is preferred that the filling channel in the region of

Closing member has at least one recess into which the closure wall is at least partially immersed when the closure wall is in the closed position. In particular, at least one edge of the

Closing wall in the closed position in the

Recess, while the edge at the other end of the closure wall is still in the recess, so that the filling channel is completely closed reliably.

In preferred embodiments, it is possible that the

Pivot axis is arranged eccentrically to the filling channel. The at least one round trained section then points

preferably a larger diameter than at least one transverse dimension of the filling channel.

In all embodiments, it is preferred that the

Filling device a filling pot for receiving the

Intermediate supply of a bulk material to be filled comprises.

Preferably, at least one conveying member is provided, which is designed in particular as a conveyor turbine. It is possible and particularly preferred that the conveying member is arranged inside the Fülltopfes. Preferably, the region of the interior of the Fülltopfes is rounded, from which extends the filling channel to the outside.

The conveyor turbine is preferably received in the filling pot at the rounded region. In the case of vertically rotating conveyor turbines, the filling channel preferably extends tangentially outwards from a lower region and, in particular, in the lowermost region of the filling pot.

Preferably, the closure member is in the mounted state at least partially within a rectangular area, the outer circumference and / or the cross-sectional area of the

Surrounding pot as closely as possible. In conveyor turbines, which rotate around a horizontal axis of rotation, this is

Closing member preferably at least partially below the interior of the Fülltopfes. In conveyor turbines, which rotate around a vertical axis of rotation, this is

Closing member preferably at least partially laterally from the interior of the Fülltopfes.

As a result, a particularly compact structure is achieved, since the blades of the conveyor turbine extend at least partially upwards or laterally of the closure member.

This creates a dense spatial structure, which in

radial direction in a rotating packing machine requires little volume. Such a configuration does not require more space than the known variant with a slide valve. This results in no larger outer diameter, which would cause a greater peripheral speed of the packing machine.

It is advantageous that a small diameter of the

Packing machine the slip-on automatically working

Increased to plug and thus improves the overall availability. The discharge behavior is improved because the low Peripheral speed of the packing machine allows a more accurate discharge and a lower load on the bag, since the tangential velocity is lower at the discharge than in packaging machines with a larger diameter. The channel closure according to the invention allows reliable operation with a small total diameter.

In particular, by such a configuration, the exchange of differently shaped filling devices is made possible by a filling device according to the invention, so that not only new packaging machines can be equipped with filling devices according to the invention, but also old machines, where in the course of maintenance, a new inventive

Filling device can be installed.

The filling means may comprise a filler neck which is connected to the filling channel. Preferably, the filler neck is connected to the filling channel via an elastic hose. A second elastic hose for a scissors valve is not required to squeeze the elastic hose there. There is only one - relatively short - elastic hose needed for a weight decoupling of the filler from the rest of the filling channel. This is z. B. possible to perform a gross weighing in which the filler neck is weighed with the valve bag hanging thereon during the filling process to adjust the amount to be filled exactly.

The packing machine according to the invention has at least one

Filling device, as described above. In this case, the packing machine can be designed as a grouting packer, which has a single filler neck. It is also possible that one packing machine, several side by side

having arranged filler neck and is designed as a so-called row packer. Such a packaging machine is particularly preferably designed to be rotatable and has a plurality of filling devices distributed over the circumference, which during the

Rotation of the packing machine Valve bags with bottling Fill bulk material.

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

In the figures show:

Fig. 1 is a highly schematic plan view of a rotating

 Packing machine;

FIG. 2 shows a filling device for a packing machine according to FIG. 1; FIG.

FIG. 3 shows the channel closure of the filling device according to FIG. 2; FIG.

Fig. 4, the filling device of FIG. 2 in a schematic

 Section with a valve bag schematically illustrated thereon;

Fig. 5, the filling device of FIG. 4 with partial

 closed channel closure; and

Fig. 6, the filling device of FIG. 4 with complete

 closed filling channel.

FIG. 1 is a highly schematic representation of a plan view of a packaging machine 50 according to the invention

shown, which serves for filling bulk materials in valve bags. For example, with the packing machine 50

Valve bags 4 filled with cement.

The packing machine 50 rotates in the direction of the arrow 54 in FIG

Clockwise. In an appropriate angular position, an automatic plug 51 is provided, the valve bags 4 removes a bag stock 53 and automatically to the rotating over each filler 30 each a valve bag. 4

shoots up.

In the further rotation, the valve bags 4 with the filled bulk material filled. First, a filling in the coarse flow, until a predetermined weight threshold is reached. Thereafter, the filling is done in fine flow until the final weight is reached. It can be one

Calming phase follow until the angle is reached, in which the discharge belt is provided, to which the filled valve bags are dropped. On the discharge belt 52, the weight of the valve bags 4 can be checked again. The filled valve bags 4 are removed.

FIG. 2 shows a filling device 1 for, for example, a packing machine 50 according to FIG. 1. The filling device 1 here comprises a filling pot 25, in which a conveying turbine 27 rotating here about a horizontal axis is provided as conveying element 24. In order to allow an insight into the interior of the Fülltopfes 25, gem. Fig. 2 which removes the filler pot to the side closing cover plate. This allows the interior 29 of the Fülltopfes with the

Feed turbine 27 are viewed.

About the product inlet 26 to the filling pot 25, the bulk material to be filled is supplied. By turning here in the clockwise direction conveyor turbine 27 is to be filled

Bulk material pressed in the direction of the filling channel 2, which is in a lower region 28 and here in the. lowest region of the Fülltopfes 25 extends approximately horizontally outwards.

This is followed by a channel closure 3, which in the

Filling channel 2 is provided. The channel closure 3 comprises a closure member 6, which is received here in an approximately cylindrical receptacle 32. The closure member 6 is

pivotally provided in the receptacle 32 and can be pivoted by the lever 9 and the drive 10. As drive 10 here serves a cylinder drive 14, the transfer of the closure member 6 from a closed position to a partially open position and then into a

fully open position 13 allows, as shown in FIG. shown

On the walls 15 and 16 of the filling channel 2, the

Closing member approximately formed sections 8, where the closure member 6, the walls 15 and 16 passes.

As a result, the sealing of the filling channel 2 is facilitated to the outside, since only a rotating surface must be sealed, which does not have to be moved through the bulk material. Therefore, the wear is much lower than other closure devices.

Fig. 3 shows a perspective view of

Channel closure 3, wherein the closure member 6 to the

Swivel axis 7 is pivotally received around. The

Pivot axis 7 extends centrally through the round sections 8 of the closure member. 6

Shown again is the lever 9, which leads in conjunction with the drive 10 to a pivoting of the closure member 6. By pivoting the closure member 6, the closure wall 18 around the pivot axis 7 around

pivoted. As a result, the filling channel 2 can be partially or completely released or closed. It runs the

Pivot axis 7 transverse to the longitudinal extent of the filling channel 2 and here even perpendicular to the longitudinal axis of the filling channel. 2

With reference to Figures 4 to 6 is hereinafter the

Function of the filling device 1 and the channel closure 3 explained.

In the position shown in FIG. 4, the channel closure 3 is completely opened, since the closure wall 18 of the closure member 6 is in the upper position. Here, the central area 34 is completely released.

In this embodiment, even the entire cross section of the filling channel 2 is released in the fully open position 13 and has no appreciable interference contour. The through the conveyor turbine 27 funded bulk material 5 is through the filling channel 2, the elastic tube 31 and the

Filler 30 filled in the valve bag 4. The valve bag 4 hangs with its valve on the filler neck 30. The filler neck with the valve bag 4 attached thereto is

Weight-wise decoupled from the filling device. 1

added. The closure wall is upwards out of the

Puffed out filling channel.

Fig. 5 shows the partially open position 12, in which the closure member 6 assumes a different pivot angle 20 and in which the portion 19 of the filling channel 2 is freely flowed through, was significantly reduced. The closure wall 18 has closed here more than half of the filling channel 2 and has been pivoted from the upper recess 22 into the filling channel 2 into the pivoting position 20a. In contrast, the closure wall 18 is still completely within the recess 22 in the pivot position 20 shown in FIG. 4.

In Fig. 5 it can be clearly seen that at vertical

Arrangement the closure member 6 and the channel closure 3 at least partially below the Fülltopfes 25 and the

Interior 29 of the Fülltopfes and below the

Feed turbine 27 are located. As a result, very little space is required in the longitudinal direction of the filling device.

Fig. 6 shows the closed position 11 of

Channel closure 3, in which the closure wall 18 the

Filling channel 2 completely closes. In this pivotal position 20b, one edge of the closure wall 18 projects into the depression 23 at the lower bottom of the filling channel 2, so that a more dense labyrinth-like closure 33 of the filling channel 2 is achieved. In this position, the closure member 6 with respect to the position of Fig. 5 is further pivoted. A subsequent opening of the filling channel 2 can by a

Swiveling back of the closure member 6 in the in Fig. 5 or the position shown in Fig. 4 take place.

In preferred embodiments, a cylindrical receptacle for the closure member 6 is provided in the channel closure, also to facilitate the manufacture. The lower part of the cylindrical receptacle can be provided with a correspondingly shaped insert 56, so that the corresponding wall of the filling channel has almost no impurities, which form vortexes in the flowing bulk material. The recess 23 is preferably shaped and has so little

Dimensions on that no significant disturbance of the

Product flow arises.

In FIG. 6, the rectangular area 58 of the outer periphery of the visible part of the Fülltopfes 25 is additionally shown in dashed lines. It is clear that part of the

Channel closure 3 within this boundary line

is arranged. In particular, the part of the closure member 6 and here even the entire in the region of the filling channel

lying part of the closure member 6 within the

Outer periphery 58 shown.

Furthermore, the rectangular area 57 is shown in phantom in Fig. 6, which the interior of the Fülltopfes 25th

surrounds as closely as possible. The closure member 6 is partially disposed within the dash-dotted rectangular area 57.

Overall, the invention provides a very advantageous

Filling device available that works wear, the Füllkanal safely seals to the outside and requires very little space. This can make a replacement known

 Filling devices are made so that a longer life with reliable function can be achieved. Furthermore, the connection dimensions of known filling devices can be maintained, so that a problem-free replacement can take place.

Such arrangements allow a very compact structure and a small space requirement.

LIST OF REFERENCE NUMBERS

1 filling device 21 cross section

 2 filling channel 22 recess

 3 channel connection 23 wells

 4 valve bag 24 conveyor

 5 Bulk goods 25 Fill pot

 6 closure member 26 inlet

 7 pivot axis 27 conveyor turbine

 8 round section 28 lower section

 9 Lever 29 Interior of the filling pot

10 drive 30 filler neck

 11 closed position 31 elastic hose

 12 partially opened 32 recording

 Position 33 labyrinthine closure

13 open position 34 central area

 14 cylinder drive 50 packing machine

 15 wall 51 on plug

 16 wall 52 discharge conveyor

 17 Interior of the filling channel 53 Sackstock

 18 Shutter wall 54 Direction of rotation

 19 part 55 cover

 20 Swivel position 56 Insert

 20a swivel position 57 rectangular surface

 20b swivel position 58 rectangular area

Claims

Claims : 1. filling device (1) for a packing machine with a  Filling channel (2) and with at least one controllable  Channel closure (3) to the flow of one in one  Valve bag (4) to be filled bulk material (5) through the  To control filling channel (2),  characterized,  in that the channel closure (3) comprises a pivotable closure member (6) arranged at least partially within the filling channel (2), the pivot axis (7) of which is aligned transversely to the filling channel (2), such that the channel closure (3) in the closed state forms the filling channel essentially completely closes and completely opens the filling cross-section in at least one central region (34) in the fully opened state. 2. Filling device (1) according to claim 1, wherein the  Channel closure (3) comprises at least one circular section (8) and formed with the round  Section (8) passes through the filling channel (2). 3. filling device (1) according to one of the preceding  Claims, wherein the channel closure (3) via a lever (9) and a drive (10) between a closed (11) and at least one open position (12, 13) is adjustable. 4. filling device (1) according to the preceding claim, wherein the drive (10) comprises a cylinder drive (14). 5. filling device (1) according to one of the preceding  Claims, wherein the closure member (6) in  opposite walls (15, 16) of the filling channel (2) at least protrudes. 6. filling device (1) according to one of the preceding Claims, wherein the closure member (6) in the region of Inner (17) of the filling channel (2) at least one eccentrically to the pivot axis (7) arranged closure wall (18). 7. filling device (1) according to one of the preceding  Claims, wherein one of the closure wall (18) released share (19) of the filling channel (2) of the  Swing angle (20) of the closure member (6) depends. 8. filling device (1) according to one of the preceding  Claims, wherein the filling channel (2) at least adjacent to the closure member (6) has a substantially rectangular cross-section (21). 9. filling device (1) according to one of the preceding  Claims, wherein the filling channel (2) in the region of  Closing member (6) has at least one recess (22) in which the closure wall (18) is at least partially disposed when the closure wall (18) in a fully open position (13)  is located. 10. filling device (1) according to one of the preceding  Claims, wherein the filling channel (2) in the region of  Closing member (6) has at least one recess (23) into which the closure wall (18) at least partially immersed when the closure wall (18) is in the closed position (11). 11. filling device (1) according to one of the preceding  Claims, wherein the pivot axis (7) off-center to  Filling channel is arranged and / or wherein at least one circular section (8) has a larger diameter than a transverse dimension of the filling channel. 12. filling device (1) according to one of the preceding  Claims, wherein a filling pot (25) for receiving a Intermediate supply to be filled bulk material (5) provided is. 13. filling device (1) according to one of the preceding  Claims, wherein at least one conveying member (24) is provided, which is designed in particular as a conveyor turbine (27). 14. Filling device (1) after the two previous ones  Claims, wherein at least the region (28) of the  Interior space (29) of the Fülltopfes (25) is designed rounded, on which the filling channel emerges, wherein preferably the conveyor turbine (27) is received therein. 15. Filling device (1) after one of the previous three  Claims, wherein the closure member (6) in the mounted state at least partially within a  Rectangular surface is located, which surrounds the outer periphery and / or the cross-sectional area of the Fülltopfes as close as possible. 16. filling device (1) according to one of the preceding  Claims, wherein a filler neck (30) is connected to the filling channel (2). 17. filling device (1) according to the preceding claim, wherein between the filler neck (30) and the filling channel (2) an elastic hose (31) is provided. 18. Packing machine (50) with at least one filling device (1) according to at least one of the preceding claims.