DE102006027920A1 - Packing machine for filling of bulk materials in bags, comprises storage container for liquid products, dosing element for feeding of the bulk materials to the container, multi filling devices, and control device - Google Patents

Abstract

The packing machine for filling of bulk material in bags (13), comprises storage container for liquid products, dosing element for feeding of the bulk materials to the container, multi filling devices, and a control device. Two separate dosing devices are intended, of which the control device is controllable. Two different components of the bulk material are supplyable to the container. A unit is intended to cause a mixture of the two different components of the bulk materials. The unit comprises a mechanical mixing unit at the storage container. The packing machine for filling of bulk material in bags (13), comprises storage container for liquid products, dosing element for feeding of the bulk materials to the container, multi filling devices, and a control device. Two separate dosing devices are intended, of which the control device is controllable. Two different components of the bulk material are supplyable to the container. A unit is intended to cause a mixture of the two different components of the bulk materials. The unit comprises a mechanical mixing unit at the storage container. The mechanical mixing-unit comprises a turbulence mechanism and/or guide plate mechanism and/or shovels mechanism and/or snail mechanism and/or agitator. The dosing element comprises two dosing devices equipped with weighting device. A sensor device for the determination of filling quantity of the bulk materials is intended in the packing machine and comprises weight sensor and/or pressure sensor. The sensor device detects a measure for the total weight of the packing machine. The packing machine is carried out as rotating unit and as rows packer. The packing machine is hangingly loaded on a supporting device, and the measure for the total weight is deduced from a loading and/or deflection of the support device. An independent claim is included for a method for the operation of the packing machine for the filling of bulk materials in bags.

Description

The The invention relates to a packaging machine and a method of operation a packing machine, wherein the packing machine in particular for filling Bulk goods in Sacks provided is. The invention is particularly suitable for filling building materials, such as. Cement, but also for filling granules or other pourable goods. The The invention will be described below by way of example with reference to the filling of Cement in sacks This application is not restrictive.

It Various packing machines are known in the prior art become. For example, packing machines have become known with the one or more filling devices in the form of e.g. filling tubes or filler neck equipped, to which the bags to be filled are attachable or to the ones to fill Sacks are attached can.

nowadays are made with packing machines not just one component Bottled products, but it will be common also filled with mixed products, which have two or more components. To do this, the individual Components of the mixed product in a separate plant in one Mixed silo or first mixed in a separate mixing device, so that the packing machine charged with the finished product becomes.

One example for such a mixed product is chromate-free cement, which is produced to avoid cement eczema on contact with the cement. to Chromate reduction is added in particular iron (II) sulfate. The thus produced in a separate mixing plant chromate-free Cement, however, has only a limited shelf life, as the effect wears off over time. As the cement in a specially designed facility on Stock is mixed before the cement in the final packaging bottled is shortened this period of intermediate storage of the product the subsequent availability of the pre-packed chromate-free cement.

It Therefore, the object of the present invention is a device and a procedure available at the two components of a product only at the Packaging system to be metered and mixed.

These Task is solved by a packing machine with the features of claim 1 and by the inventive method Claim 13. Advantageous developments of the invention by the subclaims Are defined.

The Packing machine according to the invention according to claim 1 is used for filling a product in sacks and has a reservoir for intermediate spoking of the filling material on. The contents may include two or more components. At least one metering device is provided for charging the storage container with the contents. By means of at least one filling device become the ones to be filled Filled bags. A Control device is used for control. There are at least two separate ones Dosing devices provided by the or a control device are controllable and with which the at least two different ones Components of the product the reservoir can be fed to the packing machine are.

The Invention has many advantages. A very significant advantage is that to be filled Two fillings Can include components that are selectively added separately can. As a result, a considerable flexibility of the system is achieved. Another whole considerable advantage is that a separate mixing plant for premixing of the product to be filled can be omitted. Furthermore is not stable for products that are not stable for a long time after mixing an increased Ensures durability because the mixture takes place almost immediately before bottling.

In A preferred embodiment of the invention is at least one Means provided for a mixture of the at least two different components of the contents to effect. The means is in particular a in or on the packing machine integrated means.

In In all embodiments, the packing machine can have one or more filling devices for filling the sacks exhibit. In preferred embodiments of the invention is the Packing machine designed as a rotating system and includes over the Scope distributes several filling devices, the e.g. in the form of filling tubes or filler neck accomplished could be. In the so-called rotating packing machines rotate the individual filling units around a common vertical axis. Such machines allow one very effective fully automatic mode of operation, as plugging or attachments the sacks a predetermined angular position and the removal of the bags at a other predetermined angular position takes place.

In particular, in the case of a rotating packing machine, the means for mixing the different components may also comprise an eccentric filling of the storage container of the packing machine. For example, the two (or more) components can be supplied at a certain radial distance from the axis of rotation via the metering devices and thus band-shaped next to and be filled one above the other in the reservoir. With sufficiently fine bands or strands of the individual components, such introduction into the storage container already results in considerable mixing of the individual components, which in many cases is sufficient.

In A preferred embodiment of the invention comprises the means for mixing at least one mechanical mixing device on the Reservoir the e.g. at least one swirling device and / or at least a baffle device and / or at least one vane device and / or at least one screw device and / or at least one stirring device and / or a stirrer or more. For example, one is also Kind of ploughshare possible, the the surface in the storage container cached contents penetrates and the contained contents lift and mix. A swirling device can be a or more turntables or an impeller, etc. include.

In a preferred embodiment of the packaging machine according to the invention the means for mixing comprises the metering device with the at least two Dosing. For example, it is possible and preferred that the with the individual metering promoted components of the filling into a joint promotion line lead, the conveyor organ assigned. Through appropriate facilities in the common delivery channel or the joint support line a mixing of the individual components can be achieved and reinforced, in which therein e.g. Mixing hook or a common auger or the like are provided more.

In all embodiments of the invention is preferably at least a metering device equipped with a weighing device to funded by the metering amount of the corresponding Component to determine. This makes it possible, the flow rate a component to the flow rate to another component. In particular, the flow rate one component weighed and the flow rate of the other component or the other components are speed-controlled. Is possible It also, that all dosing devices each with a weighing Furnishings are provided.

In A particularly preferred development is at least one sensor device for determining the filling amount or filling rate of the packing machine supplied to the packing machine filling material intended. Preferably, the sensor device is suitable stepless measure too capture and output a corresponding stepless signal. infinitely variable For the purposes of this application is also a division into a variety discrete steps, as is common in digital signal processing. For example, the signal can be output with a resolution of 8 bits. Also a 10 or 12 bit resolution or even higher resolution is possible and preferred.

Preferably the sensor device is arranged such that the sensor device a measure of the total weight the packing machine recorded. For this purpose, the sensor device a Weight sensor and / or include a pressure sensor and, for example designed as strain gauges be or include such.

If the sensor device is a measure of the total weight The packaging machine can, taking into account the known Net weight of empty packing machine and other weight attached components as well as the determined or estimated weight the attached Sacks Measure for the filling quantity of the contents determined in the reservoir become. By successive measurements in e.g. periodic intervals can be the per unit time supplied Quantity of contents be derived.

Under consideration the entire capacity and the proportion of the individual components of the filling material can thus the filling rate of a second components are adjusted continuously or quasi-continuously, around the reservoir always the right ratio the two components to each other. In particular, if the relative proportion of a second component only in the range up to a few Percentage, as in the production of non-chromate cement the case is, in this way, an accurate and reliable supply the individual components are achieved because the fill rate of Main component about the weight change the packing machine is determined in total and since the filling rate of the Additional component or the additional components depending on determined total filling rate is adjusted accordingly. By the swaying device of Dosing device for the additional component can be an exact dosage.

One considerable advantage of such a procedure is that at any time The relationship the individual components supplied to the packaging machine are correct. Any eventual signal processing delay is minimal and therefore does not matter.

In A preferred embodiment of the invention is the packing machine on a support, e.g. hanging stored or supported by it. there In particular, the load or the deflection becomes a measure of the total weight the support device derived.

Next The arrangement as a rotating packing machine, it is also possible to Packing machine to perform as a series packer with several filling devices.

In all cases can any filling device the packing machine a conveyor organ be assigned to the filling to control the bag. The promoter can e.g. as a conveyor turbine, as a screw conveyor or as an air conveyor be formed, which via air supply the contents transported. It is also a gravity filling possible.

Especially Preferably, the packing machine is designed for processing valve bags. The bottled Sacks or valve bags can after removal from the filling devices additionally closed or e.g. welded be used to prevent the escape of material during further transport.

at the method according to the invention according to claim 13 for operating a packing machine for filling a filling material in sacks is a storage container for intermediate spoking of the filling material provided, which feeds by means of at least one dosing with the contents becomes. The sacks be filled by means of at least one filling device and the Method is controlled by a control device. In the packing machine is the at least two-component contents over two separate Metering fed to the reservoir controlled.

By the inventive method deleted the necessary in the prior art step of mixing in a separate mixing plant. This offers considerable procedural Benefits, as the total cost decreases.

Preferably this will be in the reservoir existing contents mixed with a mixing device.

advantageously, becomes a measure of the packing machine supplied filling determined. This can also be a measure of the weight of the packing machine be determined from then the filling weight and the current filling flow is derived.

In A preferred development is the measure of the weight of the packing machine for controlling the supply of at least one component and in particular used two or more components of the contents.

to precise control is at least the supplied mass flow of a component determined separately. When mixing two components on the one hand the total current and on the other hand the current of a component determined is, a very accurate mixture can be done.

Preferably will be a measure of that Packing machine supplied filling determined and in particular a measure of the weight of the packaging machine is determined, from the supplied Quantity of contents is derived. In particular, the measure of the weight of the packing machine used to control the supply of at least one component of the contents.

to Control of the supply of at least one component is preferred the mass flow is separated by e.g. Weighing is determined and its intake dependent on regulated by the main mass flow.

In In all embodiments, the packing machine can also be used for filling liquids or pasty Serve substances.

Further Advantages and applications arise from the embodiment, the will now be described below with reference to the figures.

In this demonstrate:

1 a highly schematic plan view of a packing machine according to the invention,

2 a strong schematic side view of the machine after 1 .

3 a detailed view with a sensor device,

4 another embodiment of a packaging machine according to the invention;

5 an embodiment of a packing machine according to the invention, which is rotatably mounted standing on the ground;

6 an embodiment of a packing machine according to the invention with a mechanical stirring device;

7 an embodiment of a packing machine according to the invention with a mechanical screw mixer; and

8th An embodiment of a packing machine according to the invention with a mechanical baffle mixer.

In 1 is a highly schematic plan view of a packaging machine according to the invention shown here as a rotating packaging machine with a total of six as filling tubes 5 trained filling facilities is executed. The packing machine turns to fill the bags 13 in the illustration 1 clockwise in the direction of the arrow "A." The sacks 13 can be made of paper and / or plastic.

An unillustrated Sackaufsteckautomat can be provided to the bags on the individual nozzles 5 aufzustecken at a defi ned angular position. The attachment can also be done manually by hand. After checking by the control device, whether a bag is attached to the nozzle, the filling process is started, in which the filling member is started and the bag on the filling tube 5 is filled.

Basically, a wide variety of materials with the packaging machine according to the invention 1 be bottled. Here in the embodiment, the packing machine is used 1 for filling pourable goods, in particular cement, wherein during filling a mixture of two or more components can be produced.

In the embodiment according to 1 and 2 includes the funding body 3 two conveyors 3a and 3b , with which different components or materials can be supplied, for example, the materials required for filling of low-chromate cement. For dosing, the amount filled per unit time is measured or derived and the metering or its delivery devices 3a and 3b regulated such that a corresponding mass flow is supplied.

The main flow from the conveyor 3a becomes a second mass flow or an additive through the conveyor 3b added.

The mixing agent 26 in this embodiment comprises a mechanical mixing device or mixing unit 27 , The mass flow of the additive from the conveyor 3b meets a turntable or impeller of the mixing unit 27 on. The surface is structured so that the impacting product is thereby swirled, leaving the particles 31 depositing over the surface of the filler in the reservoir substantially evenly distributed. The speed of the mixing device 27 can be adapted to the conditions.

Thereby As a rule, sufficient mixing is achieved. The respective mass flows are regulated so that the filling quantity and The relationship the two mass flows stay constant.

In addition to the two controlled or regulated operated conveyors 3a and 3b may be provided yet another means for mixing.

When the filling process is started, the bulk material is first filled into the bag as a so-called coarse stream with the nozzle fully open. At the same time, the bag weight is recorded at each nozzle according to the so-called gross weighing procedure. In this case, the weight of the bag chair, the neck, the bag and the bag contents is detected and deduced on the basis of the known weights of the individual components on the filling weight of the bag. If contents in the reservoir 12 is refilled, then regulate the metering devices 3a and 3b the supply of the individual components accordingly.

When the filling of the bag 13 exceeds a predetermined level, the stuffing tube 5 partially closed and the bag only on the so-called fine flow further filled. Only a smaller amount of electricity is directed into the bag, around the largely filled bag 13 To take into account and to adjust the final weight of the bag exactly.

For example, usually at one to the filling line 14a with filling material 15a filled sack 13 continue to be filled with coarse flow, while at one to fill line 14b with filling material 15b filled bag, the fine flow is activated until the desired final weight is reached.

If the final weight of a bag 13 is reached, the filling process is stopped and dropped upon reaching the appropriate angular position of the bag and the conveyor belt 19 removed.

In the 2 shown side view shows that the packing machine via a support bar 2 is stored hanging. Warehousing 10 Under the packer here serves only for centering, but not for support.

In the illustrated embodiment, the reservoir 12 up to the filling level 9 with a filling quantity 8th filled from the components of the filling. The course of the filling line 7 can vary slightly over the width of the reservoir. Due to gravity and suitable measures to compensate for the level, however, the fluctuations are small. The filling material is via the metering devices 3a and 3b of the dosing 3 the reservoir 12 fed. The metering device 3 is here arranged in a radial region outside the center, so that substantially a uniform filling of the reservoir 12 is achieved. An additional mixing device can be provided be.

The packer or packing machine 1 has at least one sensor device to a measure of the capacity 8th the filling material in the reservoir 12 to determine. The sensor device 6 can have different sensors 6 . 6a . 6d exhibit.

For example, a sensor 6 be provided, which is the deflection of the support beam 2 detected. This can be done via strain gauges 6d take place, which are arranged in a suitable manner. Instead of such a sensor 6d can also be a pressure sensor 6a be provided, which receives the weight of the packing machine. One pressure sensor or several pressure sensors 6a can eg between the support beam 2 and the support 18 be provided.

About the pressure signals can be concluded on the total weight. The individual weights of the empty packing machine and the sack weights can be subtracted, giving a measure of the filling quantity 8th is determined.

If the mass fraction of the second component is low, as is the case with the Blend of chromate-free cement is the additive component dependent on from the main component mixed. The main component is off the capacity derived and then derived from the addition of the additional component.

The level in the reservoir is preferably kept almost maximum in order to achieve consistent filling conditions. It also makes the mixture through the mixing unit 27 favored.

Depending on the substantially infinitely determined total weight or the filling amount is the metering 3 controlled to the level 9 to keep constant. The filler material is supplied to the metering device from a central warehouse or silo which is not part of the packaging machine. For safety is a limit switch in the form of a rocker arm 25 at the packing machine 1 provided, for example, an end stop of the metering 3 if a defect occurs.

When refilling with product is the drag lever 25 is used to perform an automatic calibration by first filling the reservoir until the trigger arm responds. The then existing filling amount is set to 100% and then the supply is controlled so that the filling quantity is constantly at the desired value of eg 70%, 80%, or eg 90%. This provides a self-regulating system. A scraper 24 compensates for local elevations.

The packing machine in total is powered by a drive 4 turned.

In 3 is an enlarged view of a sensor 6 displayed. Here is the sensor using two spacer bars 21 at one parallel to the support beam 2 provided rod 20 intended. Depending on the deflection of the support beam 2 gives the strain gauge 6d corresponding signals. To correct temperature influences, a temperature sensor 22 be provided. This can be caused by different temperatures deflections of the support beam 2 be calculated out.

In 4 another embodiment is shown, in which also a pressure or weight sensor 6b is provided. The mixing functions correspond to the embodiment according to the 1 and 2 and will therefore not be explained again. Here is the weight of the packing machine 1 over the sensor 6b and the here performed as a support centering 10 derived in the soil. It is also possible that on the upper support beams 2 even more sensors are provided. It is also possible that between the lower part 11 and the upper reservoir 12 Weight sensors are provided, via which the filling quantity is determined. The packing machine after 4 includes a separate Sackabwurf 16 who the individual sacks 13 yields.

Here is the mass flow of the conveyor 3a the mass flow of the conveyor 3b directly added. This allows both components simultaneously and evenly into the reservoir, so that the mixing agent 26 through the two conveyors 3a and 3b is formed.

The packing machines 1 be about controllers 17 controlled, which evaluate the signals of the individual sensors. In this case, a separate control and / or a central control device can be provided for each filling tube.

According to the embodiment 5 is the bagger 1 standing rotatably mounted on the ground. A stand storage 23 stores the packing machine and causes by means of a motor, not shown, the rotating rotational movement. Also in this embodiment, two metering devices 3a and 3b and a mechanical mixing unit 27 used. The central drive also causes the rotational movement of the mechanical mixing unit 27 ,

Again, the mass flow of the metering device 3b the mass flow of the metering device 3a directly added. In support of Ver Mixture may be another mechanical mixing unit, which may include, for example, a baffle device, screw devices, wing devices or eg blade devices, etc. may be provided.

At the mechanical mixing unit 27 can baffles or wings 28 be provided, which cause a better mixing in the reservoir. For more homogeneous mixing effect several mixing units 27 be provided.

As sensors 6 Here are several pressure or weight sensors 6c provided, which are preferably distributed uniformly over the circumference. For example, three sensors can be arranged at an angular distance of 120 °. In order to catch falling material, a drip pan can be provided, which optionally collects material that collects during collection of the bag, collects it and feeds it back into the process.

In the in the 6 to 8th illustrated embodiments, in addition to the metered supply of the individual components and mechanical mixing units 27 used.

In the example below 6 includes the mechanical mixing unit 27 a stirring device 30 with some sort of flocks and in the design after 7 is at least one screw device 29 intended. 8th shows an embodiment with a Leitblecheinrichtung 28 in the reservoir 12 , wherein the baffles can be adjustable. The mechanical mixing units 27 are each arranged in the reservoir to homogeneously mix the product stored there before it is filled into the bags.

With the invention is the mixture of two or more components with high accuracy possible. additional upstream separate mixing devices are not needed. to Mix the individual product streams in appropriate proportions in the reservoir introduced. A mechanical mixture is possible but can also be omitted depending on the requirements and design.

advantageously, the addition is controlled by the mass flow of the main product. Since the supplied Mass flow is known or derived, the zuzusetzende Mass flow of the additive or an additive calculated exactly become. The mass flow of the additional product or other products will then be the one you want Flow regulated. For this purpose, the throughput of the additives each recorded and adjusted if necessary to maintain the mixing ratio.

About the Regulation will be the ratio the individual components exactly met. Because the capacity in the reservoir at any time is detectable, is a timely control of the addition of each Components possible and prefers and depends practically only from the measuring interval from.

It it has been found that the mixing is very good and e.g. in the event of of building materials is completely sufficient. At the bagging of e.g. Cement usually takes place in the conveying member of the respective filling device one more extra Mixing takes place when the conveyor organ e.g. as a conveyor turbine or screw conveyor is formed because there is an additional mechanical mixing.

It can Also, more than two substances are mixed together. For example can also three, four or five or more metering devices may be provided.

1

packing machine

2

shore

3

metering

3a, 3b

metering

4

drive

5

filling pipe

6

sensor

6a, 6b, 6c, 6d

sensor

7

fill line

8th

capacity

9

filling height

10

centering

11

lower part

12

reservoir

13

bag

14a, 14b

fill line

15a, 15b

filling material

16

bag discharge

17

control

18

In stock

19

conveyor belt

20

pole

21

spacer bars

22

temperature sensor

23

article storage

24

scraper

25

cam follower

26

mixed Media

27

mixing unit

28

Leitblecheinrichtung

29

screw means

30

agitator

31

particle

Claims (18)

Packing machine ( 1 ) for filling a filling in bags ( 13 ), with a storage container ( 12 ) for temporarily storing the filling material, at least one metering device for feeding the storage container ( 12 ) with the contents, at least one filling device ( 5 ) for filling the bags ( 13 ) and with a control device ( 17 ), wherein at least two separate metering devices ( 3a . 3b ) provided by the control device ( 17 ) are controllable and with which at least two different components of the contents of the reservoir ( 12 ) can be supplied. Packing machine ( 1 ) according to claim 1, wherein at least one agent ( 26 ) is provided to effect a mixture of the at least two different components of the filling material. Packing machine ( 1 ) according to claim 2, wherein the means comprises at least one mechanical mixing unit ( 27 ) on the reservoir ( 12 ). Packing machine ( 1 ) according to the preceding claim, wherein the mechanical mixing unit ( 27 ) at least one swirling device ( 28 ) and / or at least one baffle device ( 28 ) and / or at least one blade device ( 28 ) and / or at least one screw device ( 29 ) and / or at least one stirring device ( 30 ) in the storage container ( 12 ). Packing machine ( 1 ) according to one of claims 2 to 4, wherein the agent is the metering member ( 3 ) with the at least two metering devices ( 3a . 3b ). Packing machine ( 1 ) according to one of the preceding claims, wherein at least one metering device ( 3a . 3b ) is equipped with a weighing device. Packing machine ( 1 ) according to claim 6, wherein at least one sensor device ( 6 ) is provided for determining the filling of the filling material supplied to the packing machine. Packing machine ( 1 ) according to claim 6 or 7, wherein the sensor device ( 6 ) is arranged such that the sensor device ( 6 ) a measure of the total weight of the packing machine ( 1 ) detected. Packing machine ( 1 ) according to one of claims 6 to 8, wherein the sensor device ( 6 ) a weight sensor and / or at least one pressure sensor ( 6 ). Packing machine ( 1 ) according to one of the preceding claims, which on a support means ( 2 ) is mounted in particular suspended and wherein a measure of the total weight in particular from a load and / or deflection of the support device ( 2 ) is derived. Packing machine ( 1 ) according to one of the preceding claims, wherein a plurality of filling devices ( 5 ) are arranged and wherein the packing machine is designed as a rotating system. Packing machine ( 1 ) according to one of claims 1 to 10, wherein a plurality of filling devices ( 5 ) are arranged and wherein the packing machine is designed as a series packer. Method for operating a packing machine ( 1 ) for filling a filling in bags ( 13 ), with a storage container ( 12 ) for temporarily storing the filling material, at least one metering device ( 3 ) for loading the storage container ( 12 ) with the contents, at least one filling device ( 5 ) for filling the bags ( 13 ) and with a control device ( 17 ), wherein at least two different components of the filling material are supplied to the storage container by means of at least two separate metering devices controlled by the control device. The method of claim 13, wherein the existing in the reservoir filling is mixed with a mixing device. Method according to one of claims 13 or 14, wherein a measure of the Packing machine supplied filling is determined. Method according to one of claims 13 to 15, wherein a measure of the weight the packing machine is determined. A method according to the preceding claim, wherein the measure of the weight the packing machine for controlling the supply of at least one component of the contents is used. Method according to one of claims 13 to 17, wherein at least the supplied Mass flow of a component is determined separately.