EP2152586B1 - Packing machine - Google Patents

Description

The invention relates to a packing machine for filling sacks and in particular for filling valve sacks with bulk material, in which the packing machine has a housing and a filler neck arranged thereon for filling the sacks. The packing machine is used in particular for filling bulk goods such as e.g. chemical products, building materials or granules. Likewise, however, the filling of pasty or liquid substances is possible.

In the prior art (see, for example DE-A-102 58 246 ) Different packaging machines have become known, each having a transport member to precisely infer the typically arriving from the top of the packing machine bulk materials through the filler neck into the bag to be filled.

Depending on the desired requirements and product to be filled, a corresponding packing machine is designed in the prior art whose dimensions are adapted to the prevailing conditions. Depending on the product to be filled, a different transport element is selected. The choice of the type of transport organ depends, among other things, on the density of the product to be filled and its other properties, as well as the desired filling rate.

Compared to the cited prior art, it is an object of the present invention to provide a packing machine, which is suitable for receiving different transport organs to decide only during assembly of a packing machine, for which product or which product group the machine is suitable. A further aspect of the object is to convert the packaging machine according to the invention for filling other product groups by exchanging individual components in order to enable flexible use.

This object is achieved with a packaging machine with the features of claim 1. Preferred developments of the invention are defined by the subclaims.

A packing machine according to the invention is used for filling bags and in particular for filling valve bags. The packaging machine according to the invention has a housing, on which a filler neck for filling the bags is provided on a front surface. In the housing, a transport member for transporting the bulk material to be filled to the filler neck is provided to allow a metered filling of the bulk material. The housing of the packaging machine according to the invention is structured to accommodate different transport organs and has such dimensions that it is suitable for receiving different transport organs. In the housing, at least one vertical filling turbine, a horizontal filling turbine and an air transport organ can optionally be used as a transport member. In the packing machine according to the invention, the position of the filler neck on the front surface of the housing does not change by the replacement of the transport member, but remains the same, so that despite replacement of the transport member, the position of the packing machine within a filling area does not need to be changed or adjusted.

The packing machine according to the invention has considerable advantages. By replacing the transport member, the packing machine according to the invention can be converted to other and e.g. fill lighter product groups. In the production of the packaging machine according to the invention, it is also possible to optimally equip the machine for a particular product group to be filled by selecting the desired transport member. It is also possible to use customized transport organs, for example, if the customer prefers a certain type of transport organ.

The invention also makes it possible to set up the packing machine at a customer and to try the appropriate transport organ by the packing machine is sequentially equipped with different transport organs to perform tests with the product to be filled and to determine the optimal transport organ.

Particularly advantageous is the ability to use horizontal or almost horizontal or vertical or almost vertical or vertically arranged filling turbines optional. With the same housing and components, a flexible use is made possible, whereby manufacturing costs can be reduced in the case here in individual production or possibly in small or very small series manufactured products.

The bags can be made of paper as well as plastic. The use of plastic-coated paper bags is also possible.

In a preferred embodiment of the invention, the filler neck is arranged centrally on a front surface of the housing. This allows a flexible use and a flexible variability of the packaging machine according to the invention. There If the filling nozzle typically adjoins the turbine region tangentially in a filling turbine, the main part of a horizontally arranged filling turbine is provided substantially on one side of the filling turbine. By contrast, a vertical filling turbine is typically aligned symmetrically in the lateral direction of the packaging machine with respect to the filler neck.

The housing of the packaging machine according to the invention is designed in particular closed, so that an effective personal protection is provided. At the same time, the components contained are also protected from dust and environmental pollution. The housing is designed to be closed from all sides, but may have service doors or maintenance flaps or the like.

In all embodiments, the packing machine is used for filling of bulk materials in valve bags, but in particular can not only consist of paper or plastic.

In preferred developments, the transport member is arranged laterally centrally in the housing. This is the case in particular in the case of air transport organs, in vertical filling turbines or in screw transport operations.

In other preferred developments, the transport member is arranged eccentrically in the housing, as is the case for example with horizontally arranged filling turbines.

Particularly preferably, the packaging machine according to the invention is suitable for receiving other types of transport organs. Preferably, the packing machine is suitable for receiving a pump-conveying member, which transports the material to be conveyed via a membrane or a piston principle. The packing machine can also have a worm conveyor.

In a particularly advantageous manner, the packaging machine according to the invention is suitable and provided for receiving filling turbines of different diameters in a further development. For example, the packing machine may be provided for receiving a horizontally arranged filling turbine with diameters between 200 and 500 mm. In a particular embodiment, the packing machine for receiving horizontally arranged filling turbines of 280 and 400 mm in diameter is suitable and determined.

During production, it then decides for which product or product group the packaging machine is initially suitable. If the product to be filled changes in the course of the operating time, the packing machine according to the invention can be rebuilt with little effort, with an exchange of the transport member is carried out for the bulk material to be filled.

In all cases, it is preferred that a Blähmanschette is provided at the filler neck to keep the valve bag to be filled during the filling process close to the filler neck.

The packing machine according to the invention may also have two or more filling nozzles and be designed, for example, as a row packer.

Preferably, the support frame of the housing consists of one or more folded sheets, which are in particular welded.

In all cases, it is preferred that the weighing system is suspended on a highly rigid profile, wherein the high-stiffness profile is designed in particular as a solid profile. Preferably, in the packing machine according to the invention, at least one bag holding unit is provided above the filling nozzle, which protrudes forward for holding a bag from the front surface of the housing as the filler neck. This is very advantageous because a larger or even complete opening of the bag during the filling process can be ensured by a separate bag holding unit from the filler neck. As a result, the filling process runs undisturbed. The bag is filled evenly and completely by the filling material. A buckling of the front bag part is reliably prevented. Otherwise, filling nozzles can also be used, in which the bulk material to be filled not only leaks forward, but also partially or completely downwards. But even with the use of such filler neck offers a bag holding unit benefits over the opening of the bag, in particular over the entire width of the bag.

Preferably, the bag holding unit is at least by a diameter of the filler further from the front surface of the housing forward than the filler neck. In particular, the bag holding unit is provided for keeping the bag open over substantially the entire bag width in order to ensure an undisturbed filling process.

Advantageously, the bag holding unit is intended to engage in a loop of the bag above the bag valve. In particular, existing plastic or paper bags are used, which may have one or more corresponding loops.

The bag holding unit can be designed in particular as a holding dome, holding tube or as a support plate.

In all embodiments, the filling process is preferably weight-controlled according to the filling weight. In particular, the gross weighing method is used, which weighs the bag during the filling process at the filler neck. Part of the weighed system is then the filler neck and possibly the bag holding unit. Depending on the application and design, a bag chair can be provided.

To support the filled bags, a storage unit can be seen before. The storage unit may be located on or in front of the housing and assist the operator in removing the bags. For this purpose, the storage unit can be provided adjustable in height in order to support the bag from below after the filling operation. For height adjustment, the storage unit may have a scissor mechanism or other adjustment mechanism. The adjustment mechanism can be manual or automatic.

Further advantages and possible applications of the present invention will become apparent from the embodiments which are described below with reference to the accompanying figures.

Fig. 1

eine perspektivische Ansicht einer erfindungsgemäßen Packmaschine;

Fig. 2

eine Vorderansicht der Packmaschine nach Fig. 1;

Fig. 3

eine Seitenansicht der Packmaschine nach Fig. 1 mit geöffneter Wartungsklappe;

Fig. 4

eine Seitenansicht der Packmaschine nach Fig. 1 mit einer senkrechten Füllturbine;

Fig. 5

eine Aufsicht auf die Packmaschine nach Fig. 1;

Fig. 6

eine Aufsicht auf die Packmaschine nach Fig. 1 mit einem anderen Transportorgan;

Fig. 7

eine Aufsicht auf die Packmaschine nach Fig. 1 mit einem weiteren Transportorgan; und

Fig. 8

eine Seitenansicht der erfindungsgemäßen Packmaschine mit einem Luft-Transportorgan.

Show:

Fig. 1

a perspective view of a packaging machine according to the invention;

Fig. 2

a front view of the packing machine after Fig. 1 ;

Fig. 3

a side view of the packing machine after Fig. 1 with opened maintenance cover;

Fig. 4

a side view of the packing machine after Fig. 1 with a vertical filling turbine;

Fig. 5

a view of the packing machine Fig. 1 ;

Fig. 6

a view of the packing machine Fig. 1 with another transport organ;

Fig. 7

a view of the packing machine Fig. 1 with another transport organ; and

Fig. 8

a side view of the packing machine according to the invention with an air transport member.

In FIG. 1 is a schematic perspective view of a packaging machine 1 is shown.

The packaging machine 1 comprises a housing 2, to which a filler neck 3 is decoupled for weight measurement, in order to fill valve sacks 25 with a filling material, in particular a bulk material. To control the filling process is a control unit 8, which is mounted here in the embodiment on one side of the housing 2. On the control unit 8, an operating and display unit 10 is provided with which the current filling conditions can be set and read.

The pneumatic components and lines are preferably received protected inside the housing 2.

In the packaging machine 1, the weight of the bag 25 is determined during the filling process in order to control the filling accurately and to achieve an accurate bag weight. The weighing system includes the fill tube and a fill tube support plate attached to the fill pot via counter links. About load cells (not shown), the weight is determined. Here, the filling tube is used with the Füllrohrplatte as a unit that can be pre-assembled and pre-adjusted prior to assembly of the packing machine.

Above and to the right and left of the filler neck is surrounded by a dedusting hood 21 to which a dedusting nozzle 20 is provided, to which an air suction is connected to suck off the bulk material exiting during the filling process. In particular, when taking a filled bag often enters a certain amount of the product to be filled from the filler or again from the bag valve. In the case of toxic or hazardous or generally chemical products, the limit value of the particle concentration in the ambient air must be complied with, which may require extraction. The same applies to dye particles or other dusting products.

Above the filling nozzle, a bag holder 22 is provided, which fixes this on the filler neck after attaching a bag to be filled 25. The bag holder 22 is driven pneumatically. At the bag holder 22, a detector may be provided which detects whether a bag is attached or not, to prevent a start of the filling process in the absence of bag.

During the filling process, the bag 25 is supported by a support plate 18 to avoid kinking to the rear. The support plate 18 is part of the weighing system.

In Fig. 2 the packing machine 1 is shown in a front view. It can be seen that the filling tube 3 is arranged centrally in the lateral direction on the packaging machine 1, while the product storage container 7 in the embodiment according to Fig. 2 is arranged eccentrically on the upper side of the housing. This is due to the fact that a horizontal filling turbine is used as a transport member, which is in the representation of the filling nozzle 3 in accordance with Fig. 2 extends to the left to the control unit 8 and is arranged centrally below the product storage container 7. It is achieved a particularly high degree of flexibility.

In the case of the packaging machine 1 according to the invention, the height of the filling neck 3 above the ground is generally about 1000 mm, so that the machine is designed in particular for sack lengths 26 of 350 to 650 mm or 1000 mm. But it is also possible to fill longer sacks. In special cases, a foundation frame may be provided which, at a height of e.g. 300 mm allowed a maximum bag length 26 of almost 1300 mm. Longer sacks are used especially for lightweight materials that have a low density.

If several machines according to the invention are arranged next to one another, the spacing remains independent of the filling turbine used or of the transport element used. Although the connection point on the upper side of the housing changes depending on the transport member used, but since there is typically a significant vertical distance to the silo, despite the use of different transport organs in the packaging machine 1 according to the invention, the location of the machine even after a possible Changeover process remain the same.

In Fig. 3 a side view of the packaging machine 1 is shown, wherein for better clarity, the cover flap of a maintenance opening 15 has been removed to allow an insight into the interior of the packaging machine.

The transport member 4 is designed here as a horizontal filling turbine, which is driven by a drive belt 6 by a motor 5. To adapt the height difference between an air transport member and the horizontal filling turbine used, an adapter ring 23 is provided in the housing.

The housing 2 substantially seals the packaging machine inwardly, so that the drive belt 6 and the motor 5 are received wear-protected. Possibly entering the housing material is collected in the backfill collection tray 24 in the bottom region of the packaging machine 1, which can be emptied periodically.

The housing 2 comprises a support frame, which consists of several folded sheets, which are welded together to ensure the necessary stability. The weighing system is suspended on a stiff profile, which is designed as a solid and rectangular parallelepiped beam to ensure a high weighing accuracy.

The filling process is controlled by the control unit 8, the filling turbine being stopped when the desired bag weight is reached and the closure 9 being activated, so that no further material is filled into the bag.

In the FIGS. 2 and 3 illustrated packing machine 1 may be a modification of the packing machine Fig. 1 exhibit. According to this modification, the otherwise identically constructed packing machine may comprise a bag holding unit 27, which is part of the weighed system and projects above the filling nozzle 3 from the front surface 33 of the housing 2 to the front. In this case, the bag holding unit 27 is further from the front surface 33 of the housing 2 forward than the filler neck.

In particular, the bag holding unit is at least the simple diameter 32 of the filler neck 3 from the front surface 33 of the housing 2 forward than the filler neck 3. The bag holding unit 27 is inserted into a tab or loop 28 above the bag valve of the bag and clamped at the beginning of Filling the empty sack on match, so that then results in an undisturbed filling.

Preferably, the bag holding unit 27 protrudes farther from the front surface 33 by a multiple of the diameter 32 of the filler neck 3, so that the bag holding unit 27 extends to keep the bag 25 open over almost the entire bag width 29. A gap may remain at the end to the To allow adaptation to different sack widths. For adaptation, the bag holding unit 27 may be telescopically extendable.

In these embodiments, the bag holding unit is part of the weighed system. The weight of the weighed system is continuously or periodically determined continuously and deduced from the result of the weight contained in the bag.

In Fig. 4 is a side view of the packing machine 1 with another transport member 4 is shown. The transport member 4 is designed here as a vertical filling turbine 14, which in turn is driven by a motor 5 via a drive belt 6. An adapter ring 23 is not required here for adjusting the height difference in the rule.

The protected inside the housing 2 vertical filling turbine 14, the drive belt 6 and the motor 5 are shown here in dashed lines behind the side wall.

The housing 2 also seals the packaging machine substantially inwardly, so that the drive belt 6 and the motor 5 are in turn received wear-resistant.

In the FIGS. 5, 6 and 7 three different views are shown on the packaging machine 1 according to the invention, in which each different transport organs are used. The transport organs after FIGS. 5 and 6 differ according to the size of the horizontal filling turbines used. In Fig. 7 In contrast, an air transport member is used, which keeps the transportable bulk material through the supply of air flowable and transported on.

As in Fig. 8 to recognize, the air-transporting member 13 is oriented obliquely to the horizontal, by the slope of the flow behavior of the product. Above the Fülltopfes 16, a pressure chamber 17 is provided, which is set under a slight overpressure and used to fluidize the bulk material to be filled.

A separate adapter ring 23 is not required when using such a sloping bottom air transport member 4.

As if by comparison of the supervision of the FIGS. 5, 6 and 7 becomes clear, can be guaranteed with the invention, despite the use of different transport organs a constant grid size for the arrangement of the machine.

Therefore, the packing machine 1 according to the invention offers considerable advantages, since in the same housing 2 most different transport members 11-14 can be attached. As a result, a uniform grid dimension is made possible, regardless of the type of transport member used 4. Thus, the prefabrication of housings 2 is possible because the exact shape does not depend on the transport member used. This allows a more cost-effective production.

The invention enables a modular design of a packaging machine, wherein core assemblies can be used in different embodiments.

In addition, the conversion of existing systems is possible, for example, if the bottling product range changes. This allows a very flexible use of the packaging machine 1 according to the invention. For conversion, the upper receiving plate is replaced by a matched to the respective transport organ receiving plate.

As a rule, the bags to be filled are manually attached to the filler neck 3 and the filled sacks are taken off again by hand. But it is also possible that the packing machine 1 equipped with an automatic Sackaufstecker and with an automatic bag removal device.

Claims (15)

1. A packing machine (1) for filling sacks, in particular valve sacks, having a housing (2) at which a filling port (3) for filing the sacks is provided wherein inside the housing (2) a transport element (4) is provided for conveying the bulk material to be bagged toward the filling port (3),
   characterized in
   that the housing (2) is structured to receive different transport elements (4) and is dimensioned such that the transport element (4) employed in the housing (2) may selectively be at least a vertical filling turbine (14), a horizontal filling turbine (11, 12) and an air transport element (13), wherein if the transport element (4) is exchanged, the position of the filling port (3) on a front face of the housing (2) remains unchanged.
2. The packing machine (1) according to claim 1, wherein the filling port (3) (12) is positioned centered on the front face.
3. The packing machine (1) according to claim 1 or 2, wherein the transport element (4) is positioned centered in the closed housing (2).
4. The packing machine (1) according to claim 1 or 2, wherein the transport element (4) is positioned off-center in the housing (2).
5. The packing machine (1) according to the preceding claim wherein the housing (2) is suitable to receive filling turbines (11, 12) of different diameters.
6. The packing machine (1) according to at least one of the preceding claims wherein a pump transport element and/or a screw-type transport element can be employed at the housing (2).
7. The packing machine (1) according to at least one of the preceding claims wherein the filling port (3) is provided with a filling collar to seal the filling port (3) from the sack (25) during the filling process.
8. The packing machine (1) according to at least one of the preceding claims wherein two or more filling ports (3) are provided.
9. The packing machine (1) according to at least one of the preceding claims wherein the structural frame of the housing (2) consists of canted metal sheets.
10. The packing machine (1) according to at least one of the preceding claims wherein the weighed system is suspended from a highly rigid profile (19) which highly rigid profile (19) is in particular configured as a solid profile.
11. The packing machine (1) according to at least one of the preceding claims wherein a sack holding unit (27) is provided above the filling port (3) which for holding a sack (25) protrudes forwardly from the front face (33) of the housing (2) further than does the filling port (25).
12. The packing machine (1) according to the preceding claim wherein the sack holding unit (27) protrudes forwardly from the front face (33) of the housing (2) further by at least one diameter (32) of the filling port (3) than does the filling port (3).
13. The packing machine (1) according to at least one of the preceding claims 11 to 12 wherein the sack holding unit (27) serves to hold the sack (25) open substantially over the entire sack width (29) and is provided to engage a loop (28) of the sack (25) above the sack valve.
14. The packing machine (1) according to at least one of the preceding claims 11 to 13, wherein the sack holding unit (27) is part of a weighed system.
15. The packing machine (1) according to at least one of the preceding claims wherein a deposit unit is provided to support a filled sack (25).

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