DE20307083U1 - Device for producing prescribed amount of paint or dye has two storage vessels containing base materials, unit for controlling dosing unit for materials and dosing unit for gravimetrically/volumetrically dosing materials - Google Patents

Abstract

Device has two storage vessels (1) containing the base materials, a calculating unit (4) for controlling a dosing unit for the materials, and a dosing unit (9) for gravimetrically or volumetrically dosing the materials. The storage vessels are formed as cartridges for emptying the base materials and re-closable using a closure (2). Device has two storage vessels (1) containing the base materials, a calculating unit (4) for controlling a dosing unit for the materials, and a dosing unit (9) for gravimetrically or volumetrically dosing the materials. The storage vessels are formed as cartridges for emptying the base materials and re-closable using a closure (2). The dosing unit has a holder (10) for receiving a storage vessel liberated by the closure. The holder is provided with a pressing unit to empty the base material and a mixing unit (11-12) is arranged within the holder.

Description

Techkon GmbH S 22.710 G-DE

(30.04.2003/sä/st)

Device for producing a predeterminable quantity of a special coloured liquid

The present invention relates generally to the technical field of mixing colored liquids with low to high viscosity and in particular to a device for producing a predeterminable amount of a special colored colored liquid according to the preamble of the main claim.

The device can also be used for the colorimetric determination of color data that can be used in recipes and for the computer-aided import, storage, export and retrieval of dye and varnish recipes. Color liquids such as printing inks are used in the printing and packaging industry, paints (varnishes) in brush, dip and spray coating in construction, painting, automotive and furniture construction, colorant dispersions for coloring textile fibers, foams and plastic granules or dye solutions for coloring food, pharmaceuticals, cosmetics and chemicals.

In these industries, it is often necessary to mix special colours - in some cases also called spot colours. These are colours that are created by defined proportions of certain basic colours.

-also called basic colors- must be mixed. In order to clearly identify the special colors and keep their number manageable, so-called color charts have been introduced in many color-producing and color-processing industries, as well as across industries for graphic and product design. These nomenclatures name a special color and describe in the form of so-called color recipes in which proportions the basic colors should be mixed.

If a specific special color is required, the user currently has three options:

Firstly, manual mixing: Based on the paint recipe (if available), the user obtains high-viscosity (i.e. pasty, viscous) to low-viscosity (i.e. thin) liquid in the required basic colours. Based on the desired total amount of paint, he calculates the proportions of the basic colours using the rule of three. The proportions are weighed using a scale or, alternatively, the volume proportions are determined and then mixed. This method has the following disadvantages:

It is prone to errors due to the non-program-supported calculation as well as the inaccurate manual weighing and dosing, which means that the mixing result cannot be exactly repeated.

The usual packaging of high and low viscosity basic color liquids takes place in paint cans and/or buckets. These are difficult to open and close, and removing the pasty liquids with a spatula requires a skilled hand. If a paint can is only partially emptied, the remaining residue will gradually become swollen due to the inevitable inclusion of air.

dry out.

Handling with a spatula and stirring in a mixing bowl can easily lead to contamination of surrounding parts. The cleaning effort after mixing is great and increases the already high time expenditure.

Secondly, delivery by the paint manufacturer: Here, the special color is mixed using a paint dosing and mixing system. Individual paint containers filled with the basic colors are connected to a filling station via a pump and hose system. The required amount and the color name are entered into a control computer. The paint pumps are controlled by the computer and the correct proportionate dosage is carried out. Such systems are technically complex and take up a lot of space. They are not economically viable for users of special colors, especially since constant utilization must be guaranteed so that the paint lines and pumps do not stick. Their use is therefore limited to manufacturers and suppliers of paint and a few large user companies. Even for paint manufacturers, only larger mixing quantities are economical, so that the user very often has leftover paint that has to be disposed of or stored.

And dittens - computer-aided mixing with so-called laboratory systems: Due to the disadvantages of larger mixing quantities described under second, smaller, demand-based special color order quantities are used, especially in the printing and packaging industry.

mixed by specialist dealers using laboratory systems on behalf of the ink manufacturers and delivered to the users. Such systems can also be found in the materials laboratories of some packaging printing companies. These laboratory systems have the disadvantages that their dosing and mixing devices take up a relatively large amount of space and that they are very expensive due to the fact that their software functions are rarely used and therefore cannot be operated economically for most users of special inks - or for many specialist dealers.

All three options mentioned also have in common that the existing practical solutions for importing and exporting color data, including color recipes, are mostly limited to a proprietary exchange format. However, it would be desirable to have an exchange in a standardized form. Such de facto standards are, for example, the so-called container formats Color Exchange Format (see the publication "CxF Whitepaper, Release 1.0, June 2002" by Gretag-Macbeth AG) and Job Definition Format (see the publication "JDF Specification, Release 1.1, April 2002" by CIP4, - International Cooperation for Integration of Processes in Prepress, Press and Postpress) in the printing and packaging industry. Support for CxF and JDF requires corresponding software interface definitions and allows the device to be integrated into networked production environments both within the company (local area networks, intranets) and across companies (wide area networks, Internet).

Based on the above-mentioned disadvantages and deficiencies and taking into account the

In view of the state of the art outlined above, the present invention is based on the object of proposing a semi-automated device according to the preamble of the main claim for producing smaller, demand-based mixed quantities of color liquids.

This object is achieved in a generic device according to the preamble of the main claim by its characterizing features in that the storage containers are designed as cartridges that can be emptied of the basic color liquid in a metered manner and can be reclosed by means of a closure, that the dosing unit has at least one holder for receiving a storage container freed from the closure in an inverted overhead position, that the holder is provided with a squeezing device for emptying the basic color liquid in a metered manner controlled by the dosing unit and that the mixing unit is arranged below the holder.

According to the teaching of the invention, this achieves

to relieve the user of unpleasant, predominantly manual tasks - calculating recipes or dosage quantities, opening paint cans, taking pasty and thin paints or varnishes, operating and reading precision scales, mixing paints or varnishes in containers or on stone slabs - by means of a semi-automatic device and to make the dosing and mixing result reproducible at any time,

- soiling of surrounding parts - paint cans and cartridges, spatulas and stirring tools, mixing vessels and mixing plates - and of the hands and thus also the

to avoid previous cleaning effort,

to enable the provision of quantities in line with requirements - i.e. on the one hand avoiding the use of leftover paint and on the other hand not only mixing quantities suitable for production, but also test mixtures for large quantities from tank-based mixing systems - without having to accept the previous delivery times of paint fluid manufacturers or their specialist dealers,

to allow, if necessary, the mere dosing of base colour liquid and base lacquer quantities - i.e. without calculating or calling up a colour recipe and without a subsequent mixing process - simply by precisely squeezing out the respective storage container,

- to minimise dosing and mixing effort, colour recipes should be limited to a maximum of three components, i.e. three basic colours,

- to provide a device designed as a compact desktop system and thus saving space, as well as being data-networkable and overall significantly more economical to operate than the solutions mentioned under points two and three.

The essence of the present invention is therefore to calculate control data from color recipes that are given or determined using color measurement technology, by means of which color liquids can be precisely dosed in relation to a required total amount, which is in particular on the order of a desktop application, and can be homogeneously mixed with one another at the same time or subsequently.

For this purpose, at least one magazine

Storage containers - according to the invention, squeezeable and resealable cartridges are preferably provided, the contents of which consist of different colored liquids that represent the complete basic color palette according to an industry-standard color fan - e.g. HKS, Pantone, RAL - or a proprietary basic color system. These liquids have application-specific processing properties of corresponding ranges, e.g. oxidatively drying or UV-curing printing inks for various printing processes or emulsion paints and nitro lacquers for indoor and outdoor applications.

The storage containers are conveniently marked with adhesive labels that have a bar and/or alphanumeric code that can be printed on a printing unit connected to the computing unit of the device and suitable for printing adhesive labels. The label provides information on administrative data; this includes at least the color name, the color fan system, a reference to the application-specific processing properties and the mass of color liquid contained before and after dispensing, which can be determined in each magazine compartment not only by the consumer measurement during dispensing but also by a sensor that records the fill level of the respective storage container, in order to inform the user about the current stock and, if necessary, automatically initiate a reorder.

The labelling and management of the mixed colour liquids to be produced is carried out in a similar way, whereby the adhesive label with

Hl-"

the barcode and/or alphanumeric code must be placed on the mixing vessel; this administrative data also forms the basis for new orders of the same recipe as required.

The associated import and export of recipe-usable color data, color recipes and administrative information can be carried out using local and wide networks, e.g. intranets and the Internet, as well as standardized or industry-standard container formats, e.g. CxF and JDF, or at least ASCII text-compatible applications, e.g. Microsoft Word documents and

Microsoft Excel spreadsheets, in accordance with the color recipe database.

Under these conditions, the location of the dosing and mixing process is not tied to the device on which the color data, color recipes and management information that can be used for the recipe were created. By means of data transfer via the network interface or in another way, a color recipe can be used for dosing and mixing at a distance in time and place in any number of similar devices or in systems that correspond to the current state of the art in order to dosing and mixing at the location where it is needed.

According to the specific technical design, the device has a program mask visible on at least one monitor unit, in which the corresponding color fan system is activated according to the basic color palette provided, including the color recipe database based on it. An existing color recipe can be selected from the database or based on recipe-usable

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Color data obtained from a color measurement, in particular by means of an online or offline spectrophotometer, a self-calculated and named color recipe is called up, whereby the number of color recipe components can be limited upwards and a color measurement result or self-calculated color recipe is compared in a so-called rating process with the colorimetrically closest

Database color recipes, which can be listed by name in a ranking list.

Another function in the program mask is the selection of the required total amount of color liquids to be mixed, whereby this amount is particularly in the order of magnitude of a desktop application, specifically e.g. in the range of 500 to 2500 grams and graduated in 100-gram increments.

Furthermore, the total amount can be calculated based on the estimated consumption when the ink is used later. In the printing industry, for example, a calculation of the amount of ink expected to be required can be made from information about the print run and the digital prepress data. The CIP data format in particular contains information about the sheet-related area coverage of the special colors used.

The user's dialogue with the program mask and the input of the remaining control commands to at least one computing unit are carried out via at least one operating unit, which in particular can be used as a touch-sensitive screen and/or as a keyboard

and/or is designed as a mouse and/or as a trackpad. In addition to the functions of the program mask and the online color measurement, the color data import and export and the color management, the actions of the dosing and mixing units are also controlled or regulated by at least one computing unit.

The dosing unit has at least one mechanical holder in which a cartridge is manually positioned with the outlet opening facing downwards above the mixing unit, in particular above a mixing vessel placed in the mixing unit. After removing the cartridge closure, the outlet opening secured by an internal self-closing mechanism can be placed on a valve that controls the opening or closing electromechanically or pneumatically by pushing back or relieving the self-closing mechanism.

For the process of metered emptying of a cartridge, the piston mounted in the cartridge - called the cartridge piston - must be moved in the direction of the outlet opening. In the case of the present invention, this is caused to happen by a hydraulically or electromechanically driven external piston controlled by the computing unit or pneumatically by excess pressure in the volume formed by an airtight cover of the cartridge holder and in the cartridge by the adjacent vessel edge and the cartridge piston. The dosing process is started and ended primarily by the start and end of the cartridge piston travel, with a distance sensor querying the position of the cartridge piston corresponding to the current fill level of the cartridge, and in

secondly, through the interaction of the cartridge piston and the valve. The control signal for the termination of a dosing process can be either volumetrically the piston path travelled, which is proportional to the mass to be dispensed, or gravimetrically the reaching of a mass measurement on an electronic weighing device, or chronometrically the passage of a period of time which is proportional to the mass to be dispensed.

There are at least two basic solutions for electronic weighing devices for gravimetrically precise starting and ending of the dosing process: a load cell connected to the dosing unit or a weighing platform connected to the mixing unit. The dosing unit is suspended from the load cell, whereby the decrease in mass of the base color liquid at the beginning and during the squeezing process is measured and queried, taking into account the mass of the storage container (e.g. tare of the cartridge including piston, self-closing cap and label), until the resulting mass difference corresponds to the desired dosing quantity. In the second case, which is the preferred embodiment, the mixing vessel rests on the weighing platform, whereby the increase in mass from the base color liquids dosed one after the other into the mixing vessel is measured and queried, taking into account the mass of the mixing vessel (e.g. tare of a paint can without a lid), until the resulting mass difference corresponds to the desired dosing quantity.

In order to be able to dose several basic color liquids one after the other and/or to use cartridges with liquid residues -Tenden-, it is necessary to change

S····

of the cartridges in the dosing device. The simplest, initially preferred embodiment of the present invention is the manual removal of a completely or partially pressed cartridge and the manual insertion of a full or already partially pressed cartridge in its place, with the instruction to change being given by the screen dialog. In an advantageous development of the present invention, the alternative to a dosing device with a single squeezing device is a dosing device with several squeezing devices connected to a computing unit and working automatically in alternation, whereby in the context of a desktop device, on the one hand, approximately two squeezing devices working in alternation appear to be sufficient and on the other hand, manual loading of the squeezing devices also makes economic sense here.

In order to exclude contamination of the mixing device, in particular of the stirring mechanism, and even the smallest dosing errors, the dosing device below the valve has in particular a pneumatic nozzle connected to the computing unit, the air flow of which cuts through any liquid thread that may have formed, which is particularly useful for highly viscous liquids.

The dosed pressing out of the basic color liquids is carried out, as described above, specifically into a mixing vessel. This can be an opened can - i.e. with the lid removed -, a can under protective atmosphere, a plate (for very small mixing quantities) or again a cartridge. Dosing in a

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A cartridge of any design, but large enough for the mixing that takes place in it, is useful if the mixed color liquid can only be removed from cartridges in the subsequent processing (e.g. automatic filling of printing machine ink fountains with special colors, spraying of special colors using airbrush systems). If the cartridges are too small, it is recommended that you transfer the liquid from the mixing vessel to the cartridge after mixing.

According to a preferred embodiment of the present invention, the mixing unit has a support device designed as an electric motor-driven turntable and connected to the computing unit, which is movably mounted on an electronic weighing device. Alternatively, the support device can be rigidly connected to the housing of the mixing unit and, instead of rotating, the support device can vibrate or shake. The support device, however designed, is always capable of holding a mixing vessel with a round, oval or polygonal cross-section in a way that prevents it from slipping.

In order to achieve the result of a homogeneous mixing of the primary color liquids as quickly as possible, at least one immobile or rotating stirring tool is used together with the movement of the carrying device including the mixing vessel. In an advantageous embodiment, the stirring mechanism is arranged from eccentric to concentric to the axis of rotation of the carrying device. The

The stirring mechanism consists of an electric motor-driven holding device for the stirring tool and the actual stirring tool, which is connected to the agitator unit. This is preferably designed as a low-quality spatula that is fixed in place like a screw clamp and is removed after the mixing process has ended in order to avoid cleaning work or the risk of liquid being carried over. Alternatively or in addition to this, stirring is possible with a stationary tool or - among the disadvantages listed - with tools that can be used multiple times, which are designed, for example, as a dough hook or whisk or as an inductively driven magnetic ball without a rigid connection to a stirring drive.

In addition to the mixing process being able to be started and stopped manually at any time - preferably via a button in the program mask on the monitor unit - the mixing process, i.e. above all its duration after manual or automatic starting, is controlled by a control unit connected to the computing unit of the device. The time of start is either during dosing or as soon as the dosing process from the last storage container has been completed. The preferred embodiment of the present invention involves the manual actuation of an off switch based on an instruction given to the user in the screen dialog after a defined period of time has elapsed. Alternatively or additionally, the switch-off can also take place automatically: either after a defined period of time has elapsed or - in an advantageous development of the present invention - based on a control signal from a

A sensor connected to a computing unit which detects the homogeneity of the color liquid mixture, e.g. based on video image analysis, and evaluates it as sufficient.

Advantageous embodiments and expedient further developments of the present invention are characterized in the subclaims.

Further embodiments, features and advantages of the present invention are explained in more detail below with reference to the exemplary implementation illustrated by Figure 1 according to an embodiment of the invention.

Figure 1 shows an embodiment of a device 100 according to the present invention, by means of which color data that can be used for recipes can be determined colorimetrically, color and varnish recipes can be imported, stored, exported and retrieved with computer support, and colored recipe components with low to high viscosity can be mixed in a simple, contamination-free and semi-automatic manner for producing smaller, needs-based mixed quantities of color liquids.

Figure 1 shows the entire device 100 with all components. The main components are the magazine 3, the computing unit 4 and the dosing unit 9, into which the mixing unit 11-12 is integrated. The components 3 and 9 are arranged in the most compact way to save space, but can also be set up separately or at a different angle to each other for space reasons.

The magazine 3 holds the storage containers 1. The

The number of storage locations in the magazine is based on the most likely number of basic colors in a common color fan, but can easily be expanded as required by adding additional magazines 3, especially if basic color liquids from different color fan and/or with different processing properties are to be available.

The storage containers 1 in which the basic color liquids are kept are designed as cartridges in the embodiment of the device 100, as they are used in the printing industry for automatically filling ink fountains in sheet-fed offset printing machines. These cartridges are provided with a screw cap 2 that prevents leakage and drying out, which must be removed manually when the cartridges are used. In addition, the cartridges have an internal self-closing mechanism in the area of the outlet opening and an internal, movably mounted piston that can be moved from the outside towards the outlet opening for the purpose of emptying the cartridge.

In the embodiment of the device 100, the computing unit 4 is located on the magazine, into which the monitor unit 5, the measuring device interface 6, the printer interface 7 and the network interface 8 are integrated in a compact design. The computing unit 4 is directly connected to the control units of all movable components.

The monitor unit 5 is in the embodiment of the device 100 as a touch-sensitive

Screen. It is therefore the user's interface for operating the device 100 via a program mask that is linked to all functions - from importing, saving, exporting and retrieving the color data that can be used in the recipe, dye and varnish recipes and management information, to calculating and selecting the dye and varnish recipes and management information, to calculating and selecting the dye and varnish recipes, selecting the desired mixing quantity and printing out labels for the purpose of managing the storage containers 1 and mixing vessels 13, to starting and ending the dosing and mixing process.

The housing of the dosing unit 9 has a holder 10 for a storage container freed from the screw cap 2 and the mixing unit 11-12. The holder 10 holds the manually inserted storage container with the outlet opening facing downwards and also contains the squeezing device, consisting of a lifting piston that can move the piston stored in the cartridge downwards. The dosing unit also has a valve that can open and close the internal self-closing mechanism in the storage container. In the area of the valve there is a nozzle that cuts through any threads of highly viscous liquids that may have formed with an air stream.

The mixing unit 11-12 consists of a support device 12, which in the embodiment of the device 100 is designed as a turntable that holds the mixing vessel 13 in a slip-proof manner, and a stirring mechanism 11, which in turn consists of

an immobile or electric motor-driven receiving device for the stirring tool, arranged eccentrically to the axis of rotation of the support device 12, and an actual return tool. The stirring tool is shown in the illustration as a low-value spatula for single use.

Since the holder 10 is located directly above the axis of rotation of the support device 12, the dosing of the primary color liquids can take place past the eccentrically arranged stirring mechanism 11 into the mixing vessel 13 without the stirring mechanism 11 becoming dirty. The mixing process starts during or after the dosing process has been completed, which in the embodiment of the device 100 consists of the rotary movement of the support device 12 and the hydrodynamic resistance of the immobile or rotating stirring mechanism 11.

Claims (23)

1. Device ( 100 ) for producing a predeterminable amount of a special colored liquid according to a color chart according to a color recipe from basic color liquids with low to high viscosity - with at least two storage containers ( 1 ) in which the primary colour liquids are kept, - with a computing unit ( 4 ) which controls a dosing unit for the respective basic colour liquid, - with a dosing unit ( 9 ) for gravimetric or volumetric dosing of the respective basic colour liquid according to the colour recipe, - and with a mixing unit ( 11-12 ) for homogeneously mixing the respective base colour liquids dosed by the dosing unit ( 9 ), characterized in that
the storage containers ( 1 ) are designed as cartridges which can be emptied of the basic color liquid in a metered manner and can be reclosed by means of a closure ( 2 ), that the dosing unit ( 9 ) has at least one holder ( 10 ) for receiving a storage container ( 1 ) freed from the closure ( 2 ) in an inverted overhead position, that the holder is provided with a squeezing device for emptying the basic color liquid in a metered manner controlled by the dosing unit and that the mixing unit ( 11-12 ) is arranged below the holder ( 10 ). 2. Device ( 100 ) according to claim 1, characterized in that the mixing unit ( 11-12 ) has a stirring mechanism ( 11 ), a carrying device ( 12 ) and a mixing vessel ( 13 ) for homogeneous mixing of the individually dosed basic color liquids. 3. Device ( 100 ) according to claim 1 or 2, characterized by at least one magazine ( 3 ) in which the storage containers ( 1 ) with the primary color liquids are stored ready for removal. 4. Device ( 100 ) according to one of claims 1 to 3, characterized in that the closure ( 2 ) is designed as a screw closure. 5. Device ( 100 ) according to one of claims 1 to 3, characterized in that the cartridge is designed as a cylindrical vessel with an outlet opening, has a piston located in this vessel, movable from the outside, with which the cartridge contents can be emptied through the outlet opening freed from the closure as a result of pressing out. 6. Device ( 100 ) according to claim 5, characterized in that the cartridge has an internal self-closing mechanism behind the outlet opening, which must be pushed back against an external force in order to enable the emptying of the base color liquid as cartridge contents. 7. Device ( 100 ) according to claim 6, characterized in that the dosing unit ( 9 ) has at least one electronic valve control directly connected to one of the computing units ( 4 ), which is itself equipped with a valve with a cross-section that is particularly hydrodynamically optimally designed, which opens or closes the outlet opening of the storage container ( 1) freed from the closure (2 ) by pushing back the cartridge self-closing mechanism, a compressor that builds up pneumatic and/or hydraulic pressure, and at least one supply line either to a mechanical cylinder that transmits the pneumatic and/or hydraulic pressure controllable by one of the computing units ( 4 ) for moving the piston in the storage container ( 1 ), or to the storage container (1) located in the holder ( 10 ) in order to be able to move the piston in the storage container ( 1 ) solely by means of the pneumatic pressure controllable by the at least one computing unit ( 4 ). (pressurized air) to move the piston or to move the liquid column without a piston to empty the cartridge. 8. Device ( 100 ) according to claim 6, characterized in that the dosing unit ( 9 ) has at least one electromechanical piston drive that can be controlled directly by the at least one computing unit ( 4 ) instead of a hydraulic or pneumatic pressure transmission, at least one supply line that transmits the pneumatic pressure to a nozzle, at least one nozzle that is directly connected to the at least one computing unit ( 4 ) and that, after the process of emptying the storage container ( 1 ), cuts through any highly viscous liquid thread that may have formed by means of an air flow, at least one distance sensor that is directly connected to one of the computing units ( 4 ) and that detects the fill level of the storage container ( 1 ), and at least one electronic weighing device that is directly connected to one of the computing units ( 4 ), which doses the individual primary color liquids, if necessary also under a protective atmosphere (e.g. nitrogen, carbon dioxide). 9. Device ( 100 ) according to one of claims 1 to 8, characterized in that the pneumatic pressure applied to the piston is determined optionally at its point of action - in addition to the compressor manometer - by a provided sensor and the sensor signal can be used as a manipulated variable for the control. 10. Device ( 100 ) according to one of claims 1 to 9, characterized in that the mixing unit ( 11-12 ) has at least one support device ( 12 ) which is designed as a plate, wherein this plate is either rigidly connected to the housing of the mixing unit ( 11-12 ) or is movably or immovably mounted on an electronic weighing device and/or has an electric motor drive in order to be able to be set in rotation or a low to high frequency two-dimensional oscillation (shaking movement or vibration). 11. Device ( 100 ) according to claim 10, characterized in that at least one of the carrying devices ( 12 ) can accommodate at least one mixing vessel ( 13 ) with a round, oval or biangular cross-section in a slip-proof manner, which is designed either as an empty paint can, as an empty cartridge or, in the case of very small mixing quantities, as an empty plate. 12. Device ( 100 ) according to claim 11, characterized in that the at least one support device ( 12 ) has at least one immobile or electric motor-driven or inductively operating stirring mechanism ( 11 ), which is arranged concentrically and/or eccentrically in particular with respect to the center or the axis of rotation of a support device ( 12 ) and can accommodate at least one stirring tool. 13. Device ( 100 ) according to claim 12, characterized in that the stirring tool is designed either as a low-quality spatula in a convenient form, which is rigidly clamped into the tool holder of the stirring mechanism and which must be disposed of after completion of the mixing process in order to avoid cleaning effort or the risk of liquid carryover, or as a reusable dough hook or whisk, which is rigidly clamped into the tool holder of the stirring mechanism and requires cleaning effort after completion of the mixing process. 14. Device ( 100 ) according to one of claims 1 to 13, characterized in that an electronic weighing device is provided, either as a weighing cell on which the dosing unit ( 9 ) is suspended, whereby, taking into account the mass of the storage container ( 1 ) - tare 1 - the decrease in mass of the base color liquid at the beginning and during the pressing process is measured and queried until the resulting mass difference corresponds to the desired dosing amount, or as a weighing platform on which the mixing vessel ( 13 ) rests, whereby, taking into account the mass of the mixing vessel ( 13 ) - tare 13 - the increase in mass from the base color liquids dosed one after the other into the mixing vessel ( 13 ) is measured and queried until the resulting mass difference corresponds to the desired dosing amount, in order to start and end the dosing process gravimetrically exactly. 15. Device ( 100 ) according to one of claims 1 to 14, characterized by the dosing unit ( 9 ) controlled according to calculated time periods in order to start and end the dosing process exactly according to the liquid pressed out quantities per unit of time. 16. Device ( 100 ) according to one of claims 1 to 15, characterized in that the mixing process is terminated either manually based on an instruction given to the user in the screen dialog, or automatically based on a defined period of time that has elapsed, or automatically by means of a sensor connected to one of the computing units ( 4 ), which detects the homogeneity of the color liquid mixture, e.g. on the basis of the video image analysis, and evaluates it as sufficient. 17. Device ( 100 ) according to one of claims 1 to 16, characterized by - at least one monitor unit ( 5 ) connected to the computing unit ( 4 ) for displaying the user dialog mask of the operating and control program and/or - at least one input unit connected to the computing unit ( 4 ). 18. Device ( 100 ) according to one of claims 1 to 17, characterized in that the monitor unit for operating the device ( 100 ) - in particular for operating the computing unit ( 4 ) and/or - in particular for entering color data that can be used in color recipes and naming your own color recipes and/or - in particular for operating the dosing unit ( 9 ) and the mixing unit ( 11-12 ) is designed as at least one touch-sensitive screen, in particular as at least one touch-sensitive flat screen. 19. Device ( 100 ) according to one of claims 1 to 18, characterized in that for operating the device ( 100 ) a keyboard, a mouse and/or a trackpad can be connected to the computing unit ( 4 ) as additional input units. 20. Device ( 100 ) according to one of claims 1 to 19, characterized by - at least one software which is installed in one of the computing units ( 4 ) and which determines new mixing recipes on the basis of colorimetric data; - at least one measuring device interface ( 6 ) connected to the at least one computing unit ( 4 ), which enables the connection of a color measuring device; - at least one printer interface ( 7 ) connected to a computing unit ( 4 ) which enables the connection of a printing device suitable for the output of bar codes and alphanumeric characters; and - at least one networking interface ( 8 ) connected to a computing unit ( 4 ) which enables the exchange of digital data - in particular with information which can be used for prescriptions - in local and wide networks. 21. Device ( 100 ) according to one of claims 1 to 20, characterized in that for the purpose of managing the quantities of the primary color liquids or the mixed color liquids - the storage containers ( 1 ) or the mixing vessels ( 13 ) are manually marked with adhesive labels, the printer interface ( 7 ) enabling the control of a printing device which is suitable for the output of relevant information in the form of bar codes and alphanumeric characters on adhesive labels, - the software calculates the dosed basic color liquid quantity consumption or the resulting mixed color liquid quantities: and informs the user about the current stock quantities or required mixed quantities and automatically initiates stock reorders or accepts new color mixing orders via the networking interface ( 8 ). 22. Device ( 100 ) according to one of claims 1 to 21, characterized in that a color measuring device, which is designed in particular as a hand-held or laboratory spectrophotometer, can be connected via the measuring device interface ( 6 ) in order to determine color data that can be used for recipes by colorimetric means, to calculate color and varnish recipes therefrom by means of the computing unit ( 4 ), to store these in a recipe database and to compare them qualitatively with free-standing, imported or previously calculated, colorimetrically closest color and varnish recipes - called rating - and to be able to call up and export recipes, recipe lists and rating results if required. 23. Device ( 100 ) according to one of claims 1 to 22, characterized in that via the networking interface ( 8 ) color data that can be used for the recipe can be imported - including from offline, ie bypassing the measuring device interface ( 6 ) - and exported, wherein the electronic medium - as the Internet or an intranet following the same transmission protocol with a standardized graphical user interface - called a standard browser - and/or - designed as a network solution with any transmission protocol and individual graphical user interface and to facilitate colour communication and production organisation - either so-called container formats, e.g. CxF or JDF formats, - or ASCII text documents - or Microsoft Excel tables or use software applications based on it.