EP3461760B1 - Container and device for dosing liquid media - Google Patents

Description

BACKGROUND OF THE INVENTION

The present invention relates to a stand-up pouch for holding a flowable composition with two connections and a container system for a flowable composition with such a stand-up pouch. The present invention further relates to a device for volumetric metering of a flowable composition with a container system according to the invention integrated into a circuit and to a method for producing a color formulation.

STATE OF THE ART

Conventional metering devices for liquid media generally have at least one storage container, which is controlled via mechanical or electrical pumps to remove the medium. These are usually open systems in which the storage containers are filled from the outside. For example, the containers have removable lids. Special requirements are placed on dosing systems for liquid media that contain solid particles or where there is the potential for solid particles to form in them. These include, for example: B. suspensions, d. H. Dispersions of insoluble solid particles in liquids, but also partially solidified melts or liquid media with solid particles, which result from crystallization of a solid originally dissolved in the liquid. The dosing systems for such media have e.g. B. Containers that contain a mechanical agitator in order to reduce or, at best, avoid settling of the solid. Using the pumps connected to the containers, the media is conveyed in the desired quantity (i.e. to be dosed) into a storage container (dosing template) and, if necessary, assembled together with other media to form the desired product. In most conventional systems, a specific product mixture is produced sequentially from individual doses, i.e. each of the individual components required to produce a specific product mixture is dosed one after the other from the respective container. In these systems, the storage container and the dosing device form a structural unit.

Previous metering devices have a variety of disadvantages. Many conventional dosing devices usually do not allow simultaneous dosing of the individual components. Other devices capable of simultaneous dosing are open systems in which the storage containers have to be filled from the outside. In open systems There is a risk that the media in the containers will thicken as liquid can evaporate. The fluid loss, which cannot be clearly quantified, is not taken into account when dosing. Due to the increasing solids content of the medium over time, this leads to the products having different compositions with the same dosage. In the worst case scenario, the media becomes so thick that pump delivery is no longer possible and/or the agitator mechanism is blocked or destroyed. This can result in the entire affected dosing unit (container with stirring device, lines, pump) having to be replaced.

The use of storage containers that are filled directly with the liquid medium has further disadvantages. It often happens that the dosed material is poured next to the containers during filling, the components are filled into the wrong containers or the containers overflow during filling. Even in such cases, the container system must be laboriously cleaned or even replaced.

Further disadvantages of conventional metering devices result from the fact that the media in the metering valves often dry out and/or they become clogged. The metering valves then do not work reliably, have to be cleaned at great expense and also have to be replaced frequently.

The EP 2067716 describes a container system according to the preamble of claim 1, which has a dimensionally stable container and a flexible bag with two connections arranged in the container. The container system described is suitable for use in a closed circuit in which a liquid medium, in particular a medium that tends to settle, can be homogenized by circulation without the use of an agitator.

In particular, the timely replacement of the paint bags has proven to be complex in the known devices and methods. Any remaining quantities in the bag are usually lost or have to be pumped over.

Surprisingly, it has now been found that a container system which has a stand-up pouch with two connections arranged one above the other is particularly advantageous for use in a metering device for liquid media that are at risk of settling. Such a floor-standing bag, according to the preamble of claim 4, is for example US 2005/061831 known.

The container system is designed in such a way that the circulation of the liquid media virtually eliminates enrichment, phase separation, sedimentation, crystallization and drying of media that tends to settle. There is no need to use an agitator.

It was also found that by using a stand-up pouch and, if necessary, by integrating a buffer container and/or a vacuum switch into the dosing circuit, the residual emptying of the pouches can be improved while at the same time correctly completing color preparations.

The residual emptying of the stand-up bags used can take place up to the almost complete emptying of the bags, so that no unused residues remain in the bags.

When using systems in which the storage containers are filled from the outside, there is also the risk of contaminating the liquid media with undesirable substance components or with microorganisms and/or other harmful substances.

Surprisingly, it was found that the materials for the bags can be chosen so that sterilization of the bag contents, for example by radiation, is possible.

The stand-up pouch according to the invention or the container system according to the invention advantageously enable the homogenization of fluids at risk of settling while at the same time maximum residual emptying, even under sterile conditions.

SUMMARY OF THE INVENTION

A first object of the present invention is a stand-up pouch for holding a flowable composition with a first connection in its lower region and a second connection which is arranged above the first connection at least when the stand-up pouch is completely filled.

The connections of the stand-up pouch are preferably selected from rotary, plug-in, clamping, screw connections and combinations thereof.

• die fließfähige Zusammensetzung zeigt thixotropes Verhalten,
• bei der fließfähigen Zusammensetzung handelt es sich um eine Dispersion oder Suspension mit einem Äquivalentdurchmesser der Feststoffpartikel im Bereich von 1 nm bis 100 µm,
• bei der fließfähigen Zusammensetzung handelt es sich um eine Farbdispersion,
• die fließfähige Zusammensetzung weist eine Viskosität bei Raumtemperatur im Bereich 10 mPa. s bis 105 mPa.s auf.

The flowable composition has at least one of the following features:

• the flowable composition shows thixotropic behavior,
• the flowable composition is a dispersion or suspension with an equivalent diameter of the solid particles in the range from 1 nm to 100 μm,
• the flowable composition is a color dispersion,
• the flowable composition has a viscosity at room temperature in the range 10 mPa. s to 105 mPa.s.

• eine Aufnahmevorrichtung,
• einen in der Aufnahmevorrichtung angeordneten Standbodenbeutel zur Aufnahme einer fließfähigen Zusammensetzung mit einem ersten Anschluss in seinem unteren Bereich und einem zweiten Anschluss, der zumindest bei vollständiger Befüllung des Standbodenbeutels oberhalb des ersten Anschlusses angeordnet ist, wobei die Anschlüsse unabhängig voneinander ausgewählt sind unter Dreh-, Steck-, Klemm-, Schraubverbindungen und beliebigen Kombinationen daraus,
• eine Fördereinrichtung,
• eine Entnahmeleitung vom ersten Anschluss des Standbodenbeutels,
• eine Zuführleitung zum zweiten Anschluss des Standbodenbeutels, und- einen Unterdrucksensor in der Zuführ- und/oder Entnahmeleitung, wobei die Aufnahmevorrichtung eine Aussparung aufweist, die mit dem ersten Anschluss des Standbodenbeutels korrespondiert.

A further subject of the present invention is a container system for a flowable composition comprising

• a recording device,
• a stand-up bag arranged in the receiving device for receiving a flowable composition with a first connection in its lower region and a second connection which is arranged above the first connection at least when the stand-up bag is completely filled, the connections being independent are selected from one another from rotary, plug-in, clamping, screw connections and any combinations thereof,
• a funding facility,
• a removal line from the first connection of the stand-up pouch,
• a feed line to the second connection of the stand-up pouch, and - a vacuum sensor in the feed and/or removal line, the receiving device having a recess which corresponds to the first connection of the stand-up pouch.

A further subject of the present invention is a device for volumetric metering of a flowable composition, comprising a circuit for the flowable composition with a container system mentioned above integrated into the circuit, and a metering section extending from the circuit.

• Wählen eines Farbmusters,
• Dosieren von Farbstoffzusammensetzungen aus einem oder mehreren obenerwähnten Standbodenbeuteln, über zwei oder mehr obengenannten Vorrichtungen in einen geeigneten Behälter entsprechend dem gewählten Farbmuster und
• anschließendes Konfektionieren der dosierten Farbstoffzusammensetzungen in dem Behälter zu der gewünschten Farbformulierung.

A further subject of the present invention is a method for producing a color formulation, comprising the following steps:

• choosing a color pattern,
• Dosing dye compositions from one or more stand-up pouches mentioned above, via two or more devices mentioned above, into a suitable container according to the selected color pattern and
• subsequent assembly of the metered dye compositions in the container to form the desired color formulation.

The invention is particularly suitable for flowable compositions that are prone to settling.

DESCRIPTION OF THE INVENTION

The stand-up pouch according to the invention for holding a flowable composition has a first connection in its lower region and a second connection, which is at least when the stand-up pouch is completely filled is arranged above the first connection. Here are the connections independently selected from rotary, plug-in, clamping, screw connections and any combinations thereof.

For the purposes of the present invention, stand-up pouches are understood to mean pouches commercially available under this name. The term stand-up pouch (also known as a “stand-up pouch” or SUP for short) refers to a self-standing pouch for the transport and/or storage of liquid and free-flowing substances. Since these bags can stand without any aids, for example on store shelves, they have now established themselves as an alternative to bag-in-box packaging systems. Commercially available stand-up pouches often have additional user-friendly features such as zipper closures, valves, tear notches, etc. Common stand-up pouches can have a block bottom (“plow bottom”) or an inserted bottom. The block base is made from a folded piece and sealed into the bag profile. Stand-up bags with an inserted bottom have a bottom brim that forms the body's center of gravity and allows the bag to stand securely. According to the invention, stand-up pouches with an inserted bottom are preferably used.

The bag according to the invention can be designed in one or more layers. The individual layers can be made from the same or different materials. The bag according to the invention is preferably made of film. Plastics and composite materials, such as metal composites, are preferably used as the material for the films. Materials suitable for the respective intended use are well known to those skilled in the art.

In the context of the present invention, a flowable composition is generally understood to mean a flowable medium which has at least one liquid phase or at least one particulate phase or a combination of at least one liquid and at least one particulate phase. The flowable composition preferably has at least one liquid phase. Specifically, the flowable composition is a single- or multi-phase liquid. Examples of flowable compositions are solutions, emulsions (two- and multi-phase liquids), suspensions, dispersions and other liquid media. A flowable composition may contain particulate matter or may potentially have the potential for particulate matter to form therein. These include, for example: B. Suspensions, ie dispersions of insoluble solid particles in liquids, but also partially solidified melts or liquid media with solid particles that result from the crystallization of a substance in the liquid originally dissolved solid result. The flowable composition can also be a mixture of finely divided solids, such as powder or granules. The flowable composition may be at risk of settling, ie may tend to form a solid sediment. In particular, the flowable composition can be a dye composition. The viscosities of flowable compositions can vary over a wide range, ranging from light fluid to viscous/pasty.

The connections can be common connections known to those skilled in the art and commercially available. These include, for example: B. taps, such as taps, lids, such as IBC closures, hoses, couplings or other connections.

The connections are preferably selected independently of one another from taps, covers, in particular IBC closures, hoses, couplings that lock on one or both sides and combinations thereof.

The connections can be permanently and sealingly connected to the material of the stand-up pouch using technical methods known to those skilled in the art, such as welding, gluing, vulcanization, etc.

In a preferred embodiment of the stand-up pouch according to the invention, the first connection is provided for removal and the second connection is provided for supplying a flowable composition.

In a likewise preferred embodiment of the stand-up bag according to the invention, the first and second connections are arranged essentially vertically one above the other when the bag is completely filled.

In the context of the present invention, essentially vertically arranged one above the other should mean that the projection of the straight connecting line of the center points is orthogonal with a small deviation, for example of less than 10°, preferably of less than 5°, in particular of not more than 2° the level surfaces of the earth's gravity field are in the direction of the resultant of the earth's gravity. Arranged essentially vertically one above the other should therefore mean - based on the flat-folded stand-up bag - that the straight line through the center points of the connections has a slight deviation, for example of less than 10°, preferably of less than 5°, in particular of not more than 2 °, is a normal of the standing surface of the stand-up pouch.

In a preferred embodiment of the stand-up pouch according to the invention, the distance between the first and the second connection is in the range from 10% to 99%, preferably in the range from 30% to 97%, particularly preferably in the range from 50% to 95% of the maximum possible filling height of the bag. The distance between the connections is determined as the length of the straight line connecting the two centers. In the context of the present invention, the maximum possible filling height of the bag is understood to mean the filling height of the upright bag when filled to the maximum possible extent with water or a solution with rheologically similar behavior. The connections are specifically arranged so that in every filling state of the bag, the contents of the bag are mixed by circulating the medium, e.g. B. in the circuit of a metering device is achieved.

In a further preferred embodiment of the stand-up pouch according to the invention, at least the first connection has a valve function.

In order to enable controlled removal of the flowable composition from the stand-up pouch, the first connection for removal advantageously has a valve function. In particular, the first connection is designed as a so-called coupling that locks on one or both sides.

In a special embodiment, both the first (removal) and the second (feed) connection are designed as a so-called coupling that locks on one or both sides.

• die fließfähige Zusammensetzung zeigt thixotropes Verhalten,
• bei der fließfähigen Zusammensetzung handelt es sich um eine Dispersion oder Suspension mit einem Äquivalentdurchmesser der Feststoffpartikeln im Bereich von 1 nm bis 100 µm,
• bei der fließfähigen Zusammensetzung handelt es sich um eine Farbdispersion,
• die fließfähige Zusammensetzung weist eine Viskosität bei Raumtemperatur im Bereich von 0,1 mPa-s bis 10⁷ mPa-s, bevorzugt im Bereich von 1 mPa-s bis 10⁵ mPa-s, besonders bevorzugt im Bereich von 10 mPa-s bis 10³ mPa-s auf.

According to the stand-up pouch according to the invention, the flowable composition has at least one of the following features:

• the flowable composition shows thixotropic behavior,
• the flowable composition is a dispersion or suspension with an equivalent diameter of the solid particles in the range from 1 nm to 100 μm,
• the flowable composition is a color dispersion,
• the flowable composition has a viscosity at room temperature in the range from 0.1 mPa-s to 10 ⁷ mPa-s, preferably in the range from 1 mPa-s to 10 ⁵ mPa-s, particularly preferably in the range from 10 mPa-s to 10 ³ mPa-s.

In a particularly preferred embodiment of the stand-up pouch according to the invention, the flowable composition has thixotropic behavior and/or a viscosity at room temperature in the range from 10 mPa s to 10 ³ mPa s.

A common method for determining the viscosity of a fluid at risk of settling is e.g. B. determination using a rotational viscometer according to DIN 53 019.

In a particularly preferred embodiment of the stand-up pouch according to the invention, it is collapsible.

For the purposes of the present invention, a collapsible bag is understood to mean a bag that can be compressed, pressed, collapsed, folded, collapsed or otherwise compacted without ventilation or ventilation. The inner walls should preferably not stick together and/or the wall should not be damaged.

In a preferred embodiment, the seal on the inside of the bag is designed in such a way that dead volumes, in particular due to the folds of the bag, are reduced to the lowest possible level. The bottom area in particular is designed in such a way that the smallest possible sediment space is formed.

Stand-up pouches according to the invention can, for. B. can be used for chemicals, feed, food, cosmetics, pharmaceuticals and color mixtures.

In particular, the stand-up pouch according to the invention contains a flowable composition that is at risk of settling.

In the context of the present invention, flowable compositions that are susceptible to settling are understood to mean flowable mixtures and liquids, such as solutions, emulsions (two- and multi-phase liquids) and liquid media that contain solid particles or in which there is the potential for solid particles to form in them. These include, in particular, suspensions or dispersions of insoluble solid particles in liquids, but also partially solidified melts or liquid media with solid particles that result from the crystallization of a solid originally dissolved in the liquid. In particular, the flowable composition that is susceptible to settling is a dye composition. The viscosity of the products at risk of settling Flowable compositions can vary within a wide range, ranging from slightly liquid to viscous/pasty.

• eine Aufnahmevorrichtung,
• einen in der Aufnahmevorrichtung angeordneten erfindungsgemäßen Standbodenbeutel,
• eine Fördereinrichtung,
• eine Entnahmeleitung vom ersten Anschluss des Standbodenbeutels, und
• eine Zuführleitung zum zweiten Anschluss des Standbodenbeutels.

The container system for a flowable composition according to the invention comprises:

• a recording device,
• a stand-up pouch according to the invention arranged in the receiving device,
• a funding facility,
• a withdrawal line from the first connection of the stand-up pouch, and
• a feed line to the second connection of the stand-up pouch.

The receiving device has a recess that corresponds to the first connection of the stand-up pouch.

The flowable composition is preferably at risk of settling. In particular, the flowable composition is a dye composition.

In a preferred embodiment of the container system according to the invention, at least the first (lower) connection of the bag is guided through the corresponding opening of the container. In this context, a corresponding opening is understood to mean the opening whose function corresponds to the corresponding connection of the bag, for example for feeding into the container system or for removal from the container system, in particular for removal from the container system.

In a suitable embodiment of the container system according to the invention, at least the first (lower) connection of the bag is connected to the corresponding opening of the container. For the purposes of the present invention, “connected” means that there is a connection that allows the passage of a medium located in the container system. This is usually a line.

In a preferred embodiment of the container system according to the invention, the second connection of the stand-up pouch is arranged above the first connection, regardless of the filling of the stand-up pouch.

In a preferred embodiment, the (first) removal connection and the (second) supply connection are designed as so-called couplings that lock on one or both sides in order to avoid leakage of the liquid media on the container system or system side during the separation or changing process.

The stand-up pouch should be fixed using the holding device. In particular, the stand-up bag is fixed in the receiving device in such a way that the second connection of the bag is positioned above the removal opening of the container, regardless of the degree of filling of the bag.

In a preferred embodiment of the container system according to the invention, the receiving device has a substantially cuboid external basic shape. The removal opening is arranged in particular on an end face of the receiving device. The bottom of the receiving device can be inclined towards the front side of the removal opening.

In a preferred embodiment, the receiving device has a substantially rectangular base plate and a front end wall with the removal opening. The receiving device can also have a rear wall and/or one or two side walls arranged opposite the front end wall. Alternatively or additionally, the receiving device can also have a ceiling plate.

In a suitable embodiment, the receiving device is a surrounding, dimensionally stable container, such as that in EP 2067716 is described.

In a preferred embodiment, the stand-up pouch is not completely surrounded by the receiving device.

In a further preferred embodiment of the container system according to the invention, the receiving device has a removal opening in its lower region, which is coupled to the first connection of the bag.

In particular, the removal opening and the feed opening are arranged on the same end face of the receiving device. This configuration proves to be particularly advantageous when several containers are stacked, especially with a modular design.

In a suitable embodiment of the container system according to the invention, the receiving device has a removal opening arranged in the lower region of the container, a connection from the removal opening to a first connection in the bag, optionally a feed opening and optionally a connection from the feed opening to the second connection of the bag.

As an alternative to a connection from the removal opening to the first connection, the first connection of the bag can also be guided through the removal opening of the receiving device. Also as an alternative to a connection from the feed opening to the second connection, the second connection can be guided through the feed opening.

According to an advantageous embodiment, the container system according to the invention has a connecting line from the feed opening of the container to the second connection of the bag, which is designed to be completely or partially flexible. The flexible part of the connecting line is preferably made of a suitable plastic, such as polyethylene, polypropylene, polyurethane, poly(ethylene) terephthalate, soft PVC or silicone. The flexible part of the connecting line can also be formed by a fabric tube.

According to a special embodiment, the flexible connecting line is fixed by a suitable holding device in the rear part of the receiving device and thus behind the bag.

According to an alternative embodiment, the connecting line inside the receiving device is rigid up to its upper part and is designed to be flexible from there to the second connection of the bag.

A suitable embodiment of the container system according to the invention comprises at least one negative pressure sensor and/or a buffer container. Through the additional use of a vacuum sensor and/or buffer container, the residual emptying of the bag used according to the invention can be optimized.

For example, if there is only a smaller amount available in the bag than the amount required to produce a selected color, the bag must be changed before the selected color is completed. According to usual procedures, the remaining amount remaining in the bag is lost or it has to be pumped into the replaced container. In order to avoid this complex procedure, a Vacuum switch or a buffer container, possibly in combination, integrated into the circuit of the dosing device.

The container system according to the invention additionally includes a vacuum sensor in the supply and/or removal line.

A vacuum sensor registers when the pressure drops below a specific value below normal pressure. A drop in the pressure in the line to this value or below indicates that no more liquid is being pumped into or out of the bag. The conveyor device can be switched off manually or automatically in response to this signal. The stand-up pouch can then be disconnected and, if necessary, filled or replaced.

In particular, the vacuum sensor is arranged in the extraction line.

In a likewise preferred embodiment, the container system according to the invention additionally comprises a buffer container in the supply and/or removal line.

The remaining amount remaining in a stand-up pouch can be easily transferred into the buffer container or, if necessary, temporarily stored for further use. Alternatively, the remaining amount can also be disposed of professionally.

The material for the buffer container can be, for example: B. plastics such as polyethylene, polypropylene, polyurethane, poly(ethylene) terephthalate, soft PVC or silicone, metal, ceramic, glass, paper, composite materials or suitable combinations thereof can be used. When using rigid materials, a pressure compensation system can preferably be installed.

In particular, the buffer container is arranged in the feed line.

In a particularly preferred embodiment of the container system according to the invention, the supply line and the removal line can be connected to form a circuit for the flowable composition.

The container system described advantageously works without an additional mechanical stirring device if the mixing takes place via a circuit that is formed by connecting the supply line and the removal line is closed. The flowable composition can be circulated at intervals or continuously so that segregation or settling of solids is avoided or at least greatly reduced. The container system can be designed as a one-way or reusable exchange system.

In a suitable embodiment of the container system according to the invention, the receiving device has a further recess which corresponds to the second connection of the stand-up pouch.

In a preferred embodiment of the container system according to the invention, the conveying device is a metering pump, preferably a piston pump, in particular a oscillating piston pump.

The device according to the invention for volumetric metering of a flowable composition comprises a circuit for the flowable composition with a container system according to the invention integrated into a circuit and a metering section extending from the circuit.

The container system used according to the invention is a substantially closed unit that can be inserted into the circuit when it is already filled. The container system advantageously works without an additional mechanical stirring device, since mixing takes place via the circuit. Since the container system is integrated into a substantially closed system, the flowable composition can be circulated at intervals or continuously. In this way, segregation or settling of solids can be avoided or at least greatly reduced. The container system can be designed as a one-way or reusable exchange system. It can be connected to the circuit in a modular manner. This means that filling the device with the liquid medium to be dosed is comparatively easy and clean.

When using the container system according to the invention in the device, the stand-up pouch used is almost completely emptied. The term “almost completely emptied” means that the emptied bag still contains at most 5% by weight, preferably at most 3% by weight, particularly preferably at most 1% by weight, based on the weight of the maximum filling quantity. The inner pipe or hose parts, if any, fold or fold together with the stand-up bag to the smallest possible size. After the contents of the bag have been emptied, optionally via a coupling located outside the container system, the container system can be removed from the circuit. containers and Bags can be disposed of separately, together, or reused.

The lines of the circuit and the dosing section are made of a material that is suitable for the corresponding medium, i.e. H. made of inert material. They are preferably flexible and easy to replace. Suitable materials are e.g. B. commercially available plastic hoses, e.g. B. made of polyethylene (PE), polypropylene (PP) or polyurethane (PU), poly(ethylene) terephthalate, soft PVC or silicone.

In particular, the metering section includes at least one valve. This valve is preferably a controllable metering valve.

In a preferred embodiment of the device according to the invention, the metering section comprises at least one conveyor device. In a particularly preferred embodiment, the metering section is used as a high-pressure metering system, for example with the one in the EP 2067716 split dosing described.

In a preferred embodiment of the device according to the invention, the amount of flowable composition to be metered can be controlled over the time that a valve is opened and/or a conveyor device is switched on.

In a particularly preferred embodiment of the device according to the invention, the amount of flowable composition is metered using a piston pump, preferably a vibrating piston pump.

In a particularly preferred embodiment, the metering section comprises a removal device.

Such a removal device can be a tap, a valve, a dispenser, a reducer, a transition piece, such as a nozzle, an olive, etc., an adapter, a coupling, a reusable fitting, such as a Y or a T-piece, a distributor, other fittings, such as an elbow, or any other removal device suitable for the application. In particular, a reusable fitting, in particular a Y or a T-piece, or a metering valve described below is used as a removal device in order to be able to meter a second liquid medium as an alternative or in addition to the liquid medium to be metered.

In a suitable embodiment of the device according to the invention, the removal device contains a self-closing valve (metering valve). A particularly suitable self-closing valve is, for example, in EP 2067716 described.

The valve is opened by the liquid medium to be metered when the pressure of the medium to be metered is high enough to overcome the spring force of the spring piston. This means that the liquid medium to be dosed also serves as a type of hydraulic fluid.

At the one in the EP 2067716 With the dosing valve described, the dosing medium simultaneously takes on the function of the hydraulic fluid and the sealant. In addition, it can be flushed via a second access, especially a second fitting. Another advantage is that the dosing medium is sealed against air contact directly at the nozzle opening. This very effectively prevents the nozzle from drying out. Even if particles clog the nozzle opening, the closing needle pushes through the nozzle opening due to the force of the spring piston when closing. This means that the nozzle opening is always kept clear mechanically. Through repeated rinsing processes with suitable solvents or cleaning agents, clogging of the valve can be virtually eliminated, even after long periods of downtime. This provides a reliable and maintenance-free valve, particularly when dispensing dye compositions, adhesives and other critical liquid formulations.

In particular, the self-closing valve is controlled electronically, mechanically or pneumatically for opening and closing.

The valve can additionally or optionally be equipped with a drive means, for example a motor or auxiliary motor, a pneumatic drive or a magnet, in order to be able to control the valve. The pull rod can be raised or lowered by controlling the corresponding drive means.

It is also possible to meter several media using a single removal device or to meter solvent and metering medium at the same time (admixture). To do this, the removal device must have a second access. The pressure conditions determine the mixing ratio of the components. It can especially be used in two-component systems.

It is also possible to use a so-called split dosage, as described in the EP 2067716 is described. Split dosing is a modified form of the split injection known from gas chromatography, which is used here for liquids for quotient dosing. In split dosing, defined, adjustable amounts of solvent are added to a secondary dosing channel via another access, preferably via a T, Y, X piece or an (automatic) valve. For example, if the secondary dosing channel delivers a quantity of 1000 µl with a certain dosing pulse and the split ratio is set to 1:100, then with a dosing quantity of 1000 µ! Now 990 µl of solvent and 10 µl from the secondary dosing section are dosed. The excess quantity is drained off via the split valve.

The use of such a split dosing unit makes it possible to dose the smallest amounts of liquid to be dosed with a very high level of accuracy and precision, since only a quotient of the liquid/solvent mixture to be dosed is specified and dosed via the dosing valve. The desired split ratio setting can be controlled and calibrated by adjusting the valve and changing the pump pressure.

In a further advantageous embodiment, the device according to the invention contains a flushing unit. This flushing unit includes a valve and/or a delivery unit for a solvent or cleaning agent and a container for a solvent or cleaning agent. The solvent or cleaning agent passes from the container through the delivery unit and/or the valve into the removal device via a second access.

In a further preferred embodiment of the device according to the invention, a piston pump, preferably a oscillating piston pump, is arranged in the supply line.

Two or more devices according to the invention and optionally a flushing unit described above can be used particularly advantageously together in one system. In such a system, the individual conveying devices, conveying units and/or valves of the devices as well as the conveying unit and/or the valve of the flushing unit can be controlled by a central control unit.

Within a system, several devices according to the invention and/or a flushing unit can be operated in parallel or alternately. Appropriate control electronics and operating software allow the control of Conveying devices, conveying units and/or valves, so that simultaneous dosing of different liquid media is possible.

Such a system can be used in particular for filling and/or metering liquid media, preferably dye compositions, particularly preferably pigment-containing dye compositions.

In another particularly preferred embodiment of the device according to the invention, a vacuum sensor is arranged in the extraction line.

• Wählen eines Farbmusters,
• Dosieren von Farbstoffzusammensetzungen aus einem oder mehreren erfindungsgemäßen Standbodenbeuteln über zwei oder mehr erfindungsgemäße Vorrichtungen in einen geeigneten Behälter entsprechend dem gewählten Farbmuster, und
• anschließendes Konfektionieren der dosierten Farbstoffzusammensetzungen in dem Behälter zu der gewünschten Farbformulierung.

The method according to the invention for producing a color formulation comprises the following steps:

• choosing a color pattern,
• Dosing dye compositions from one or more stand-up pouches according to the invention via two or more devices according to the invention into a suitable container according to the selected color pattern, and
• subsequent assembly of the metered dye compositions in the container to form the desired color formulation.

Assembling in the sense of the present invention is understood to mean the completion of a product. This includes all work that is necessary after filling the components to produce the product ready for sale, such as refining, mixing, packaging and/or the formation of sellable units.

In a preferred embodiment of the method according to the invention, the respective amount of the dye composition is metered over the time that a valve is opened and/or a conveyor device is switched on.

In a likewise preferred embodiment of the method according to the invention, the respective amount of the dye composition is metered using a piston pump, preferably using a oscillating piston pump.

In a particularly preferred embodiment of the method according to the invention, when an absolute pressure is reached in the range from 0.1 bar to 1 bar, preferably in the range from 0.3 bar to 0.95 bar, in particular in the range from 0.5 bar to 0.9 bar, a control signal to the dosing device, is preferred a piston pump, in particular a oscillating piston pump, and this switches off. In this case, the vacuum sensor takes on the function of a switch.

A buffer container can be integrated into a paint mixing/dosing system with a closed paste pigment system in order to support the emptying of residues and the empty notification of the individual colorant containers within a dosing device.

A buffer container essentially consists of a flexible container with at least one supply line corresponding to a further opening. The buffer container is integrated into the line circuit of the dosing device in such a way that the container can be filled without air bubbles. The flowable composition conveyed from the bag flows through the buffer container and is conveyed back into the bag via the conveyor device. The buffer container is designed in such a way that the rigidity of the container wall is higher than the resistance of the wall material of the collapsible stand-up bag.

As soon as the bag is emptied, the pump delivers from the buffer container. Because of the negative pressure that is now building up, it begins to collapse. The side walls of the buffer container are in turn connected to a microswitch via dimensionally stable surrounding side walls. As soon as the vessel wall of the buffer container loses contact with the microswitch due to shrinkage, the control unit of the dosing device receives an impulse by closing the circuit as a signal for the message "bag empty". The buffer container is preferably dimensioned so that sufficient colorant is still available to complete the currently processed recipe.

A particularly advantageous variant of residual emptying involves the use of a vacuum sensor. When using a vacuum sensor, a buffer container can advantageously be dispensed with. For this purpose, an adjustable vacuum sensor is integrated into the line system in the feed of the dosing pump. The switching point can be set so that the negative pressure does not trigger during the dosing process when the dosing medium is continuously running, but provides a switching signal when the bag has completely collapsed and is therefore empty due to the suddenly increasing negative pressure to the maximum of the pump power.

This switching signal is recorded on the control side as a “bag empty” message. Since the dosing pump only reaches this negative pressure in the suction phase, the dosing process can be interrupted at this point. The operator receives the message “Bag empty” of the relevant bag, for example on the monitor of the control computer. Alternatively or additionally, a warning light on the bag's receiving device or on a control panel can indicate that the bag is empty. The operator can now disconnect the empty bag from the system and connect a new, filled bag. After connecting the new, filled bag, the pressure equalizes and the sensor releases the device again. Dosing continues at the point where it was interrupted without any residue remaining in the empty container.

The use of a vacuum sensor is particularly advantageous because when a new bag is connected, the emptying of the current bag and the connection of a new, filled bag into the dosing device can be recorded electronically. This data can be transmitted to the manufacturer or supplier and/or recorded as part of inventory management or statistics. This data can be used to automate ordering processes, inventory records, product sales quantities, etc. Filling or loading with foreign material can also be detected in this way.

In addition, the vacuum sensor provides useful information about the condition of the dosing device. If the negative pressure is maintained in the phase between the separation of the empty bag from the system and the connection of the new bag, this is an indication that the dosing device is functioning mechanically correctly.

If the pressure is equalized without a new, filled bag being inserted, it can be concluded that the liquid-carrying system has leaks in one or more places. From this it may be possible to conclude that there is increasing wear on the dosing pump, the dosing valve or the connections. This data can also be recorded, documented and/or evaluated electronically.

For example, the operator also receives information, e.g. B. on the monitor of the control unit that a malfunction in the dosing device is to be expected in the near future. With this information, preventive maintenance or repairs can be performed if necessary without actually causing the system to fail.

A simplified variant of the dosing device with a vacuum sensor is also suitable for completely emptying a bag with only one access without loss of dosing medium from the bag. All the advantages described above can also be used here.

FIGURE DESCRIPTION

Figur 1

zeigt einen erfindungsgemäßen Standbodenbeutel.

Figur 2

zeigt ein erfindungsgemäßes Behältersystem für ein flüssiges Medium mit einem Pufferbehälter.

Figur 3

zeigt ein erfindungsgemäßes Behältersystem für ein flüssiges Medium mit einem Unterdrucksensor.

Figur 4

zeigt eine erfindungsgemäße Vorrichtung zum Dosieren eines flüssigen Mediums mit einem Unterdrucksensor und einer Dosierstrecke.

The present invention will be described below with reference to Figures 1 to 4 explained. The options presented are only to be understood as examples and not as a limitation to these options.

Figure 1

shows a stand-up pouch according to the invention.

Figure 2

shows a container system according to the invention for a liquid medium with a buffer container.

Figure 3

shows a container system according to the invention for a liquid medium with a negative pressure sensor.

Figure 4

shows a device according to the invention for metering a liquid medium with a vacuum sensor and a metering section.

1

Standbodenbeutel

2

Fitting für Zuführung

3

Fitting für Entnahme

4

Rückführleitung

5

Entnahmeleitung

6

Pufferbehälter

7

Zulauf zum Pufferbehälter

8

Ablauf vom Pufferbehälter

9

Gehäuse

10

Sensor

11

Ablaufleitung

12

Stromversorgung für Fördereinrichtung

13

Fördereinrichtung für Umwälzung

14

Zuführleitung zur Dosierstrecke bzw. -pumpe

15

Sensorkabel

16

Aufnahmevorrichtung

17

Unterdrucksensor

18

Dosierventil

19

Dosierpumpe

20

Schrittmotor

21

Dosierleitung

22

Entnahmevorrichtung

23

Produktbehälter

24

Kupplung

In the Figures 1 to 4 the following reference numbers are used:

1

Stand-up pouches

2

Fitting for feed

3

Fitting for removal

4

return line

5

Extraction line

6

Buffer container

7

Inlet to the buffer tank

8th

Drain from the buffer container

9

Housing

10

sensor

11

Drain line

12

Power supply for conveyor system

13

Conveying device for circulation

14

Supply line to the dosing section or pump

15

Sensor cable

16

Recording device

17

Vacuum sensor

18

dosing valve

19

Dosing pump

20

stepper motor

21

Dosing line

22

removal device

23

Product container

24

coupling

The in Figure 1 The stand-up bag (1) according to the invention shown has two connections arranged vertically one above the other. The connections are provided with fittings (2, 3) which allow the flow of flowable compositions, also referred to here and below as liquid media or fluids. The dimensions of the connections and fittings (2, 3) are selected accordingly for the respective application. Usually the upper connection is used for feeding and the lower connection for removal. Particularly when using the bag for liquid media that are at risk of settling, optimal mixing of the bag contents and/or complete emptying of the bag can be achieved in this way. Of course, the connections can also be reversed or both used for feeding or both for removal. The removal and feeding can take place simultaneously or one after the other. The upper connection for supply and the lower connection for removal are preferably used at the same time, in particular to implement a circuit.

Into the in Figure 2 In the container system according to the invention shown, a stand-up pouch (1) according to the invention is used. The stand-up bag (1) stands essentially independently in a housing (9) or can be fixed in the container system according to the invention by means of a receiving device - not shown in this figure. The stand-up bag (1) can be designed as a disposable or reusable system and can also serve as transport packaging. A further variant provides that the bag (1) is removed from a transport container and inserted into the receiving device (9). The bag (1) is connected to the extraction line (5) using the removal fitting (3) and to the return line using the feed fitting (2). The supply connection (2) is located above the removal connection (3), regardless of the filling status of the bag (1).

The extraction line (5) and the return line (4) can be connected to form a circuit via a suitable connection, for example a coupling (24). A feed line (14) leads to a removal and/or filling device at the coupling (24) of the removal line (5) and return line (4). The clutch (24) is usually designed as a three-way clutch.

The two connections of the stand-up bag (1), ie the removal fitting (3) and the feed fitting (2), are specifically arranged so that in every filling state of the bag (1) the contents of the bag are mixed by circulating the liquid medium in the circulation is achieved.

The connections (2, 3) are preferably designed or chosen in such a way that they simplify connection to the circulatory system, in particular via quick couplings. The flow through the container system ensures mixing as soon as the circuit is activated via the conveyor device (13). For media that tends to settle, the design of the bottom of the receiving device must be taken into account. It is preferably constructed in such a way that settling particles or phases collect near the removal area of the bag (1) (settling funnel principle). The particles that settle are first captured by activating the circuit and fed back in at the highest point of the bag. Other elements that promote or generate turbulence can also be installed and support a stirring or mixing effect, such as agitators, or elements that generate a movement of the medium when stimulated from outside.

The receiving device (16) can also be closed with a lid, for example for hygienic and/or safety reasons. For this purpose, the supply lines can be installed inside the receiving device.

In the return line (4) there is a conveyor device (13) with which the flowable composition can be circulated in the container system and/or conveyed from the coupling (24) into the feed line (14). The conveyor device (13) is supplied with energy via a supply line (12). The conveying device (13) is usually a pump, preferably a piston pump and in particular a oscillating piston pump.

A buffer container (6) is integrated into the extraction line (5). The flowable composition in the bag (1) is removed from the bag (1) via the lower connection using the removal fitting (3) and reaches the buffer container (6) via the removal line (5) through an inlet connection (7). ). At the head of the buffer container (6), the liquid medium is removed again via the drain connection (8). The buffer container (6) is partially or completely surrounded by a housing (9). There is a sensor (10) between the inner wall of the housing (9) and the outer wall of the buffer container (6). The sensor (10) is attached to the inner wall of the housing (9) in such a way that it is permanently in contact with the outer wall of the buffer container (6) during operation. If the bag (1) empties, the buffer container (6) is no longer filled with the liquid medium. This creates a negative pressure in the buffer container (6), so that the buffer container (6) contracts. As a result, its outer wall loses contact with the sensor (10). Over The sensor cable (15) passes on a signal that then leads to the conveyor device (13) being switched off, for example by interrupting its power supply (12).

This in Figure 3 The container system according to the invention for a liquid medium shown is equipped with a negative pressure sensor (17). The structure of this container system essentially corresponds to that in Figure 2 shown. The receiving device (16) is shown here schematically in dashed lines. The stand-up bag (1) stands essentially independently in the receiving device (16). It is fixed in the receiving device (16) in such a way that the feed connection (2) is located above the removal connection (3), regardless of the filling status of the bag (1). Fixing the bag is usually advantageous due to the pull that the flow or the conveyor device induces.

In contrast to that in Figure 2 In the container system shown, there is a vacuum switch (17) in the extraction line (5). On the in Figure 2 The buffer container (6) shown with the associated equipment (7, 8, 9, 10) can be omitted in this embodiment. Nevertheless, it is possible to also store the buffer container (6) with or without associated equipment (7, 8, 9, 10) in the in Figure 3 to integrate the cycle shown.

As in Figure 3 shown, the flowable composition in the bag (1) is removed from the bag (1) via the lower connection using the removal fitting (3) and through the removal line directly via the vacuum sensor to the connection (24) and further into the return line ( 4) promoted.

On the suction side of the metering pump (19), a preferably adjustable vacuum sensor (17) is integrated into the circulatory system. The switching point of the pressure sensor (17) is usually selected so that the negative pressure does not trigger during the dosing process when the dosing medium is continuously running, but when the bag (1) has completely collapsed and is therefore empty, a switching signal is triggered by the suddenly increasing negative pressure to the maximum of the pump power delivers. This switching signal is passed on to a control unit via the sensor cable (15). The control unit will interrupt the dosing process until the pressure is equalized by inserting a full bag. As soon as the vacuum sensor (17) delivers a corresponding signal to the control unit, the device is released again and dosing continues.

In Figure 4 A device according to the invention for metering a liquid medium is shown with a vacuum sensor (17) and a metering section. The device shown here is particularly suitable for metering dye compositions. The device essentially consists of two assemblies: a container system connected to a circuit and a dosing section extending from this circuit.

That according to Figure 4 The container system integrated into the device essentially corresponds to that in Figure 3 container system shown. The stand-up pouch is arranged in the receiving device (16). In the present illustration, only the feed fitting (2) connected to the return line (4) and the removal fitting (3) connected to the removal line (5) can be seen from the stand-up pouch.

The connections (2, 3) are designed or selected in such a way that they simplify connection to the circulatory system, preferably via quick couplings. The flow through the container system ensures mixing as soon as the circuit is activated via the conveyor device (13). Since dye compositions are generally media that tend to settle, attention must be paid to the construction of the bottom of the receiving device. Particles or phases that settle should be able to collect near the removal area of the bag (1) (settling funnel principle) in order to be captured first by activating the circuit and fed back in at the highest point of the bag. Other elements that promote or generate turbulence can also be installed and support a stirring or mixing effect, such as agitators, or elements that generate a movement of the medium when stimulated from outside.

If media is used that does not tend to separate, a circulation system can be dispensed with. In this case, there only needs to be a removal section (14, 18, 19, 21) from the container system for dosing.

The container system is connected to the feed line (14) to the dosing section by means of a coupling (24). The clutch (24) is preferably a multi-way clutch. For example, container systems with the same dye compositions can be connected in series using a multi-way coupling or the container system can be completely emptied.

A service clutch can optionally be inserted between the clutch (24) and the conveyor device (13). Such a service coupling allows, for example Feeding in additional liquid media from outside, such as residues of the same dye composition. The circulatory system can also be completely drained using a service coupling. The clutch (24) and the service clutch are preferably identical in construction.

The conveyor device (13) can be operated either continuously or at intervals depending on the required mixing due to the properties of the medium.

The feed line (14) is connected to the coupling (24) to a metering section. The dosing section is essentially made up of a dosing valve (18), a dosing pump (19), a stepper motor (20) and a dosing line (21). The medium to be dosed can be removed from the circuit of the container system via the dosing section. For this purpose, the medium is pumped into the metering line (21) via the metering pump (19), for example a pressure pump. The metering line (21) is released or blocked using the metering valve (18). The valve (18) is, for example, a solenoid valve. A removal device (22) is connected to the end of the dosing line. The metered liquid medium reaches a product container (23) via the removal device. From there, further assembly can take place.

After one or more dosing processes have been completed, the removal device (22) can be rinsed with a suitable solvent or cleaning agent via a rinsing unit (not shown here). The flushing unit is also connected to the removal device (22). As with the dosing process, the solvent or cleaning agent is preferably dosed under pressure. For this purpose, the solvent or cleaning agent is pumped from a container for solvents or cleaning agents into the rinsing section via a separate delivery unit, for example a pump. The flushing section is opened or closed using another valve. The valve can be, for example, a solenoid valve. If the removal device (22) is the one in the EP 2067716 Dosing valve described, the entire valve chamber and the closure mechanism of the dosing valve are advantageously flushed during the rinsing process.

The container for solvents or cleaning agents can be designed in a suitable manner. In a special version it is designed as a stand-up pouch according to the invention. It is therefore possible to design the device in a modular design.

If several devices are combined within a system, the individual removal devices (22) can be assembled into an assembly, a so-called dosing head. The EP 2067716 describes a possible embodiment of such a dosing head.

According to the invention, a modular liquid dosing system is manufactured with a closed pump/container system. The arrangement of several of these systems forms multi-channel systems that allow the simultaneous dosing of any number of individual components or preparations, but also finished media from them. Such a system essentially consists of the device described above with one or more circuits, dosing section(s), process control unit(s), a static or modular body and housing.

The conveying devices and units, pumps and valves are preferably combined in a receiving unit. For example, they can be arranged in a drawer system. The compact or modular arrangement enables quick access to individual components for service or repair purposes. The pumps and/or the valve assembly can also be accommodated modularly as a panel in the drawer or in the dosing module. The holding devices for the media bags and quick coupling units to create the circuit are housed in a container module. Both modules have their own line systems, such as internal piping and/or hose systems, which are compatible and can be coupled. The dosing module and container module also have their own power supply and internal cabling.

The dosing circuits with a closed system can be used wherever conventional systems are already in operation. The systems with a closed system can be used with all types of liquid, paste and/or pigment systems such as adhesives, food raw materials, oils, solvents, alkyd, synthetic resin, polymer, acrylic, latex, nano-varnishes, as well as dispersion and Natural color compositions are loaded. However, they are also suitable for foods or animal feed that are at risk of settling, pasty and/or sensitive foods.

With the closed system described above, solvent-containing media can be processed without any problems, as no harmful or explosive vapors can escape. In addition, the media in the stand-up pouches can be sterilized, for example by irradiation or heating, before or, if necessary, during use.

The new container system enables inline mixing, homogenization and dispersion of liquid, paste and/or pigment systems such as adhesives, food raw materials, oils, solvents, alkyd, synthetic resin, polymer, acrylic, latex, nano-varnishes and dispersions - and natural coloring compositions, but also pasty and/or sensitive foods or feedstuffs that are at risk of settling.

The stand-up pouch used according to the invention opens up new possibilities for use, preferably when used for color mixing. The mixing systems are not tied to specified container sizes. Depending on the quality of the bags, a reusable solution is possible if refilling is desired or preferred. The design as a stand-up pouch helps reduce waste as no separate transport packaging is necessary. Transport costs are reduced because the entire usable space is available.

Claims (14)

1. Container system for a free-flowing composition, comprising

   - a receiving device (16),

   - a stand-up pouch arranged in the receiving device for receiving a free-flowing composition, having a first connection (3) in its lower region and a second connection (2) that is arranged above the first connection at least when the stand-up pouch is completely filled, wherein the connections are selected independently of one another from rotary connections, plug connections, clamp connections, screw connections and any combinations thereof,

   - a conveying device (13),

   - a discharge line (5) from the first connection of the stand-up pouch,

   - a supply line (14) to the second connection of the stand-up pouch, and

   - a vacuum sensor (17) in the supply or discharge line,

   wherein the receiving device has a recess that corresponds to the first connection of the stand-up pouch.
2. Container system according to claim 1, in which the second connection (2) of the stand-up pouch is arranged above the first connection (3) regardless of the level of filling of the stand-up pouch.
3. Container system according to one of claims 1 or 2, additionally comprising a buffer container (6) in the supply and/or discharge line.
4. Stand-up pouch (1) for receiving a free-flowing composition, having a first connection (3) in its lower region and a second connection (2) that is arranged above the first connection at least when the stand-up pouch is completely filled, wherein the connections are selected independently of one another from rotary connections, plug connections, clamp connections, screw connections and any combinations thereof, which stand-up pouch is partially or completely filled with a free-flowing composition, characterised in that the composition has at least one of the following features:

   - the free-flowing composition exhibits thixotropic behaviour,

   - the free-flowing composition is a dispersion or suspension having an equivalent diameter of the solid particles in the range of 1 nm to 100 µm,

   - the free-flowing composition is a colour dispersion,

   - the free-flowing composition has a viscosity at room temperature in the range of 10 mPa-s to 10⁵ mPa·s.
5. Stand-up pouch according to claim 4, in which the first connection (3) is provided for discharging the free-flowing composition and the second connection (2) is provided for supplying the free-flowing composition.
6. Stand-up pouch according to any one of claims 4 or 5, in which the first (3) and the second (2) connection are arranged substantially vertically one above the other when the pouch is completely full and/or the spacing between the first and the second connection lies in the range of 50% to 95% of the maximum possible fill level of the pouch.
7. Stand-up pouch according to any one of claims 4 to 6, in which at least the first connection (3) has a valve function.
8. Stand-up pouch according to any one of claims 4 to 7 that can be collapsed.
9. Container system according to any one of claims 1 to 3 that additionally comprises a stand-up pouch according to any one of claims 4 to 8.
10. Device for volumetrically dosing a free-flowing composition, comprising a circuit for the free-flowing composition having a container system as defined in claim 9 integrated into the circuit, and comprising a dosing line leading off from the circuit.
11. Device according to claim 10, wherein at least one controllable dosing valve (18) is arranged in the dosing line and/or a piston pump (19), preferably an oscillating piston pump, is arranged in the supply line.
12. Device according to any one of claims 10 or 11, in which the vacuum sensor (17) is arranged in the discharge line (5).
13. Method for producing a colour formulation, comprising the following steps:

    - selecting a colour sample,

    - dosing dye compositions from one or several stand-up pouches according to any one of claims 4 to 7 via two or more devices according to any one of claims 10 to 12 into a suitable container corresponding to the selected colour sample, and

    - subsequently mixing the dosed dye compositions in the container to create the desired colour formulation.
14. Method according to claim 13, in which the vacuum sensor emits a control signal to the dosing device, preferably a piston pump, in particular an oscillating piston pump, and switches off the latter when an absolute pressure in the range of 0.1 bar to 1 bar, preferably in the range of 0.3 bar to 0.95 bar, in particular in the range of 0.5 bar to 0.9 bar is reached.

Images