SK280769B6 - Mixing and homogenization unit - Google Patents

Abstract

The invention concerns a continuous mixing and homogenization unit for, in particular, mill products. The system ensures in particular that all the raw materials are mixed together simultaneously in a pre-mixing chamber (8) in order that the subsequent homogenization takes place continuously to the highest specifications. The raw-material weighing device (4) used, as well as the worm conveyor (25) for removal of material from the weighing device, are designed as substantially tube-shaped units and together form a differential throughput-control system (6). Throughout the whole system, the inside wall in contact with the material is thus tubular and subject to a continuous cleaning action by virtue of the movement of the material. It is also possible to use several weighing devices (4) located symetrically round a collection point (17), for different components. The quality of mixing is extremely high.

Description

Technical field

The invention relates to an apparatus for mixing and homogenizing, in particular flour, comprising a dosing device, the outlet of which is connected to an inlet mixing chamber.

BACKGROUND OF THE INVENTION

In the past, batch mixers have been used to mix and homogenize bulk mills, especially raw materials for the food feed industry, which allowed good mixing and a high degree of homogeneity of all and the smallest ingredients, such as for making a bakery mix. In practice, there is considerable variation in the concept, which depends on the particular field of application. The simplest solution is to use a batch mixer designed simultaneously as a container scale. The desired raw material components are weighed sequentially and then homogenized with stirrers throughout the batch mixer. Homogeneity is well manageable here by suitably shaping the stirrers and using the optimal mixing time. However, this solution presents the basic drawbacks that result from both strictly separate operating procedures, resulting in intermittent operation consisting of dosing, weighing, mixing, homogenizing and emptying steps, and secondly, determining the volume of the batch mixer, for example 1 to 2 m ² , the time required for kneading, carrying out a homogenization cycle, and an amount that can be kneaded per hour. Thus, increased performance has narrow limits.

It has been tried in various ways to reduce these drawbacks so that, for example, at least some of the raw materials are fed by means of a weighing scale. A truly increased performance can be achieved by using the weight of the input container, in which a new mixture is prepared completely according to the recipes during the homogenization process and is poured into the dosing mixer within a few seconds. In addition, it is possible to reduce the time required for emptying if a further large container is arranged downstream of the metering knob, into which the entire batch is always discharged. Thus, a continuous flow of the mixture can be achieved from the next container by means of discharging elements. Consequently, considerable construction investment is required for the continuous output of the homogenized mixture at a high hourly output, since a certain building height is needed to allow three containers to be arranged one behind the other and gravity to discharge the mixture. If consecutive mixtures must not be contaminated or if there are particularly high hygiene requirements, periodic intensive cleaning must be carried out and, if necessary, any residue from the containers must be removed after each change of mixture.

In order to alleviate these shortcomings, continuous systems have recently been increasingly used. Similar known solutions use transport scales. However, the wider market introduction of these systems or the partial extrusion of metering mixers has not been possible to date. However, hygiene problems could only be partially solved. The homogeneity in this case is not the same as in the dosing mixers. Especially, however, there is a significant investment cost for many transport weights. Because of the poor flowability of at least one part of the components or grinders, simple dosing elements such as liquids or well-flowing grains cannot be used.

EP 70 322 discloses a commercially known device consisting of two containers for accommodating two different powders which are connected via a connecting line to funnels, under which scales with a discharge line are placed, which open into a hopper of the pressing device.

SUMMARY OF THE INVENTION

The above mentioned drawbacks are largely eliminated by a mixing and homogenizing device, in particular a flour, consisting of a metering device, the outlet of which is connected to an inlet mixing chamber, the principle being that the metering device consists of at least two dosing scales and a weighing device. The at least one dosing scale is designed as a differential flow regulator to which a dosing scale with a tubular cross-section is connected by a screw-type ejector formed by a screw-type ejector. The inlet of each dosing scale is connected to the outlet of the respective container, and the outlet of each dosing scale is separately connected to the inlet mixing chamber, followed by a homogenizer with a discharge line. At least one container is connected, on the one hand, to the drive unit of the screw extractor, on the other hand, to the electronics of the weighing container formed on the dosing scale, and to the control device.

According to a preferred embodiment, the weighing device comprises at least one microdifferential dosing scale. The homogenizer is formed by a tubular body, in which a vane shaft with blades is located and the control device is connected to a vane shaft drive.

According to a further preferred embodiment, a horizontal screw is provided between the mixture discharge line and the homogenizer, to which is connected a vertical screw leading to a container, the outlet line of which is connected to the discharge line and the horizontal screw via the first crossover. The outlet pipe is equipped with a metering flap, which is connected to a control device, to which is also connected a control and measuring device, located between the homogenizer, and a horizontal screw. The weighing device comprises at least one microdifferential dosing scale.

According to another preferred embodiment, the homogenizer has a horizontal longitudinal axis.

According to a further preferred embodiment, the weighing device is formed by at least one microdifferential dosing scale and / or a mating scale equipped with a buffer store. The entrance mixing room is formed as a combined unit. Stirrers and a homogenizer are located in the inlet mixing chamber, the lower end of which is connected to a feed screw located in the inlet mixing chamber and connected to a discharge line on which a controllable flap is connected to the control device.

According to a further advantageous embodiment, the homogenizer is designed as a vibrating homogenizer, the upper end of which is provided with an overflow which is connected via a control and measuring device to the mixing chamber inlet via a return line and to a piping equipped with a hopper to which the conveyor is connected on a second pipe turnout, located on the discharge pipe. The control and measuring device and the hopper are connected to the control device.

According to another preferred embodiment, the weighing device is formed by at least one microdifferential dosing scale. The mixing chamber and the homogenizer are formed as a single unit consisting of a pneumatic one

A homogenizer in which a kneading tube is located, provided with an overflow at its upper end. The pneumatic homogenizer is equipped with a hood at its upper end and a double bottom at its lower end for blowing air from the throttle fan. The lower end of the mixing tube opens into a controlled discharge bottom formed below the double bottom, to which is connected an outlet pipe with a control and measuring device, which is connected to a throttle, which is connected to the control device.

According to another preferred embodiment, the homogenizer has a vertical longitudinal axis.

According to a further preferred embodiment, each container is provided with a discharge device followed by a feeding screw leading into the dosing scale.

According to a further preferred embodiment, the dosing scales are arranged at substantially the same distance from the mixing chamber inlet.

According to a further preferred embodiment, the dosing scales are arranged at substantially the same height from the mixing chamber inlet.

According to a further preferred embodiment, the microdifferential dosing weight has a tubular cross-section and is equipped with a screw discharge dispenser.

The main advantage of the proposed solution is the continuous transfer of the homogenized mixture and the achievement of a considerable displacement at a high degree of homogeneity of all components.

Another advantage is that the proposed solution can be successfully processed and blended mixtures, which have so far been difficult to process, for example different qualities of flour, semolina, essences, bran but also additives such as dry binders, colorants, C vitamin, calcium, phosphate , egg powder, salt, baking powder or feed ingredients.

Another advantage is that instantaneous weight signals can also be used to add water or other liquid additives. Furthermore, the mixing and homogenizing device according to the invention also allows for special mixing tasks, for example in a pasta or bread preparation mixture, direct control of the simultaneously added water and egg soup or, for example, liquids, because instantaneous flow rate values per unit time are known. with considerable accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically shows a first embodiment of a mixing and homogenizing device, FIG. 2 shows the mixing chamber, FIG. 3 shows an arrangement of the dosing scales with respect to the entrance of the kneading; FIG. 4 shows schematically a second embodiment of a mixing and homogenizing device, FIG. 5 schematically a third embodiment of a mixing and homogenizing device, FIG. 6 shows a schematic fourth embodiment of a mixing and homogenizing device, FIG. 6A is a schematic fifth embodiment of a kneading and homogenizing apparatus; FIG. 7 is a schematic sixth embodiment of a kneading and homogenizing apparatus.

DETAILED DESCRIPTION OF THE INVENTION

An apparatus for mixing and homogenizing, in particular flour or loose grinder, shown in FIG. 1, consists of a metering device and a weighing device made up of a microdifferential dosing scale 16. The microdifferential dosing scale 16 is a tubular scale with a tubular cross-section and is provided with a screw discharge dispenser at the bottom. The dosing device consists of two dosing scales 4 with a weighing container 24, which are designed as a differential flow regulator 6. Each dosing weight 4 is connected to a screw ejector 25 with a length L which is connected to the drive unit 15. Each screw discharge dispenser 5 is connected via a rubber collar 32 at the point of the collection point 17 to the mixing chamber 8, to which a homogenizer 9 is connected, to which a discharge line 41 is attached via a discharge flange 10. 3, the outlets 26 of the dosing scales 4 are arranged equidistant from the collection point 17. The dosing scales 17 are arranged at the same distance and height from the mixing chamber 8 of the mixing chamber. The dosing scales 4 are geometrically similarly arranged from the common collecting point 17, or geometrically similar with respect to the entrance chamber 8 of the mixing. If only one microdifferential dosing weight 16 is used, it can be placed directly above the mixing chamber 8. The homogenizer 9 is formed by a tubular body 21, in which a vane shaft 19 with blades 20 is rotatably mounted and connected to a drive 18. Above one dosing weight 4 there is a cartridge 1 with the first component A and another cartridge 1 is placed over another dosing unit. The cartridge 1 is provided with an output device 2 with a vibrator 14 at the outlet. A feed screw 3 is connected to the output device 2 and opens into a neck 30 attached to the dosing scale 4 by a flexible cuff 31. The cartridge 1 is connected to electronics 13, on the one hand the drive unit 15, and on the other hand the control line 12 with the control device 7, which is connected to the drive 18. The necessary and known elements for the weight values or for the weight indicators are not shown.

The first component A is in the mixing and homogenizing apparatus of FIG. 1 to 3 transferred from the container 1 via the outlet device 2 and the feed screw 3 to the dosing scale 4. From the other container 1 the second component B is poured and transferred to the next dosing scale 4. From both dosing scales 4 of the control device 7 through the mixing chamber 8 through the mixing chamber directly to the homogenizer 9 and from there by a discharge flange 10 to the discharge line 41 of the mixture for further processing. In the mixing chamber 8, simultaneous continuous mixing of the individual components A and B takes place. In a suitable construction, additional liquid additives can also be mixed in the region of the homogenizer 9. The total flow of components A, B is controlled by the control device 7, from which the respective signals are transmitted to all the relevant elements of the device. In particular, each dosing scale 4 receives a precise dosing command by the control line 12. The electronics 13 give the desired signals, for example to the output device 2 or the feed screw 3, or the vibrator 14. The signal 15 is given to the drive unit 15 to schedule the desired volumetric dosing power which, after completion of the volumetric dose, is terminated by the weight value per time unit by differential weighing and regulated according to the intended composition of the mixture or recipe.

In many applications, one or more ingredients in a very small volume are added to components A, B, for example two kinds of flour. Special microdifferential dosing scales 16 are used for this purpose. j. the two components A, B and additives are thus brought together into one well-defined collection point 17 and poured directly into the homogenizer 9, whose drive 18 drives the vane shaft 19 at a considerable outlet speed, so that a large number of blades 20 vigorous swirl. The result can be further improved if the transition from the screw discharge dispenser 5 to the mixing entrance 8 is designed in such a way that the strong current of the first component A does not push the weaker current of the second component B to the side, immediately mixing with each other. The mixing of the individual components A, B takes place just prior to homogenization, thereby ensuring that all the mixed components A, B are combined at the same time. This fulfills the basic requirement for the highest demands on the accuracy of the recipe, mixture and homogeneity.

The dosing scale 4, in conjunction with the feeding screw 3, the screw feed metering device 5 and the corresponding control means, operates as a differential flow controller 6. When an optional filling height is reached in the dosing scale 4, the supply of the other component A, B is stopped. At least when the kneading and homogenizing device is started up, after the short restoration, the actual weight of the components A supplied is secured in the weighing container 24, and then the discharge can be started by switching on the drive unit 15. If the respective numerical values are stored in the control device 7, the desired quantity can be emptied by presetting a certain number of revolutions of the screw discharge dispenser 5. Thus, the given dosing power is a function of the speed and the volumetric efficiency of the screw feed dispenser 5, i.e. the dosing given by the volumetric dosing is less accurate than in the differential weight measurement. Even when spilling a small quantity, the dosing scale 4 ensures a reduction in weight. Weight reduction per unit of time allows switching to gravimetric determination of spilled material. By means of a more accurate gravimetric reading, it is possible to correct the necessary change in the speed of the screw feeder 5 through the drive unit 15 almost without loss of time. After a certain time of dosing, the content in the weighing container 24 drops to the lower filling height. Upon reaching this value, received as the lower fill quantity, a signal is given again and the weighing container 24 is refilled. During the filling period, the screw feeder 5 must not be used for dosing power. However, during the filling period, the appropriate value stored or the scheduled speed value assigned to the dosing power is kept, or the last measured speed of the feeding screw 3 is kept constant. For the highest demands on homogeneity and recipe accuracy, the entire workspace is very important for the overall result. In addition to the accuracy of each individual piece of equipment, the interplay must be checked not only technically but also over time to achieve a good result. For the mixing of flour and semolina, it is possible to dispense loose semolina by simply constructed differential flow regulators 6 with a slider or controlled flap, and to flour using the differential flow regulator 6 with a screw feed. The use of tubular weighing scales with 4 cross-sections allows the introduction of difficult-to-dispense components such as gluten, scrap or flour-containing flour simultaneously, so that there are no problems and uncontrollable mixing currents at the start, during operation and at the end of the kneading process.

The time loss by weighing can be reduced to almost zero by the differential-flow principle, since it is carried out in a continuous flow of components A, B at a considerably high weighing accuracy or precision. The unification of the individual component streams is ideal and happens simultaneously. The tubular cross-section of the dosing scales 4 and the tubular screw extruder 5 allow the passage of the components A, B in full cross-section in a particularly problematic weighing space. As a result, in normal operation, the product moves essentially actively across all internal surfaces, thereby producing a self-cleaning effect. The product cannot remain hanging or lying in any place. There are practically no residues that present a known problem in food processing. By properly programming the entire device, it is possible at any time to completely empty all components A, B after each product change.

The mixing and homogenizing device shown in FIG. 4 is similar to the device of FIG. 1, but is shown in a very simplified manner. The device consists of several containers 1, which are connected to the dosing scales 4, which together with the micro-differential dosing scales 16 open into the inlet space 8, which is followed by a homogenizer 9 under which a horizontal screw 40 with a mixture discharge line 41 is placed. At the end of the horizontal screw 40 is a vertical screw 42, followed by a reservoir 43, at the outlet of which is disposed the metering flap 45 and the first duct switch 44, which is connected both to the horizontal screw 40 and on the other. Between the homogenizer 9 and the horizontal screw 40 is placed a control and measuring device 47, which is connected to a control device 7 to which the metering flap 45 is connected. The further connection of the control device 7 is the same as in FIG. First

The components A, B and the additives present in the mixing chamber 8 are then conveyed by gravity directly to the homogenizer 9, which is particularly suitable in simple mixing cases. From the homogenizer 9, the mixture is fed via a horizontal screw 40 to a discharge line 41. In this embodiment, the insufficiently homogenized mixture can be introduced during the start-up via a vertical screw 42 into a reservoir 43 from which it is added via a metering flap 45 and a first pipeline switch 44 in small It is also possible to homogenize the mixture by multiple circulation in the reservoir 43 which is fed back from the first pipe switch 44 to the horizontal screw 40 and from there to the vertical screw 42. All control, control and regulation tasks are also they can be performed by means of a control device 7 or a personal computer as in FIG. First

The quality of the mixture also depends on the homogeneity of the individual components A, B and additives in the continuous process. In this embodiment, several components A, B of the same kind can be combined into groups and by their proportions, for example 25%, 33% or 50%, can be fed to a differential flow regulator 6. Each proportion must be added to an accuracy of 5%. means that cost-effective discharge elements, for example a rotary slide with an optional number of discharge speeds, can be used under the respective containers 1 with components A, B of the same kinds. The cross-section of the group is then weighed to the accuracy of the microdifferential dosing weight 16 and driven appropriately to other microdifferential dosing weights 16.

The mixing and homogenizing device shown in FIG. 5 is almost identical to that of FIG. 4 and also consists of a container 1, dosing scales 4, microdifferential dosing scales 16, a mixing chamber 8 and a homogenizer 9. In the mixing chamber 8 are placed stirrers 50 and a homogenizer 9, which is designed as a vibrating homogenizer 51 with homogenizers. blades 54, the lower end of which is connected with a screwing screw 53, located in the funnel section 52 of the mixing chamber 8, to which the discharge line 41 with the controllable flap 59 and the second duct 61 is connected. The upper end of the vibrating homogenizer 51 is equipped with a motor 55; via an overflow 56 which is connected via a control and measuring device 47 to a mixing chamber 8 via a return line 57 and a duct equipped with a discharge slider 58 connected to a conveyor 60 connected to a second pipeline switch 61. the apparatus 47 is connected to a discharge hopper slider 58 and shifting device 7, which is connected to controllable flap 59. Further wiring of control device 7 is the same as in FIG. First

All components A, B, and ingredients with a correct weight ratio enter the mixing compartment B of the kneading for good blending. The actual homogenization, i.e. uniformly finely comminuting all the components, is carried out in the mechanical vibrating homogenizer 51. In the funnel 52, the feed screw 53 moves the incoming mixture into the vibrating homogenizer 51 towards the homogenizing vanes 54. The vibrating homogenizer 51 is driven by the motor 55 in reverse. The stirrers 50 may be rotated by the same drive. Through the overflow 56, the mixed mixture is fed to the control and measuring apparatus 47, from where it is either fed back via the return line 57 to the mixing chamber 8 or is fed via the hopper 58 for further use. For quite simple cases, such as mixing two types of flour, components A, B and the ingredients to be mixed can be spilled directly from the mixing chamber 8 and conveyed by the conveyor 60 for the same use as the hopper 58. In the reverse case, of particularly high demands on homogeneity, start-up and / or residues, the mixture is also passed through the controllable flap 59 and the second pipe turnout 61 to the discharge line 41 for further processing. Controlled re-introduction from the homogenizer outlet 9 to the mixing chamber 8, for example at the start of the mixing, at disturbances or at the end of mixing, the selected amount and / or the optional time can be recirculated from the mixing chamber 8 to the homogenizer 9 and back to the chamber 8 miesenia. Since the mixture can only be moved forward in a conventional homogenizer 9, only transverse kneading and, in addition, longitudinal kneading occur in the direction of movement.

The mixing and homogenizing device shown in FIG. 6 is a partially simplified embodiment of FIG. 5 and consists of cartridges 1, dosing scales 4 and a mating scales 63 equipped with a buffer store 64. The dosing scales 4 and mating scales 63 open into the entrance and mixing compartment 8, which together with the homogenizer 9 is designed as a simple combined unit in which appropriate homogenization tools are provided which can be further improved by fluid means. Inside the mixing chamber 8 are placed stirrers 50 and in the region of the funnel piece 52 a draw screw 53 is connected to a discharge line 41 with a controllable flap 59 connected to a control device 7. This embodiment of the mixing and homogenizing device can be used where they are to mix and homogenize only different kinds of flour, i. j. where no additives need to be added.

In this embodiment, the main component M, for example baking flour or semolina, can be continuously fed from the mill directly through a mother scale 63, which measures the continuous flow from the mill and leads it directly to the entrance of the kneading chamber. The small buffer store 64 takes over the excess in the gravimetric measuring phase. All other components can now be added in the desired percentage and homogenized according to a predetermined recipe and instantaneous weight signals of the parent weight 63 with dependent dosing weights 4 via a suitable device, similar to FIG. 4 and 5. The correction takes place continuously and by weight. After a continuous process in the mill, it is possible to produce the flour mixtures in a continuous operation without the appropriate intermediate storage, which means great progress for all mixtures which, due to their specific quality, require no storage.

The mixing and homogenizing device shown in FIG. 6A is a combination of the device of FIG. 5 and 6. In this embodiment, all the advantages shown in FIG. 5 and 6, i. j. for highest homogeneity requirements, including additives.

The mixing and homogenizing device shown in FIG. 7, consists of cartridges 1, dosing scales 4, microdifferential scales 16, a mixing chamber 8 and a homogenizer 9. The mixing chamber 8 and the homogenizer 9 are formed as a single unit formed by a pneumatic homogenizer 70, in which the central mixing tube 71 is located. The pneumatic homogenizer 70 is provided at its upper end with an aspirator 77 and at its lower end with a double bottom 73 with a porous plate in which a throttle 75 is connected to which the fan 74 is connected. Below the double bottom 73 a discharge bottom 78 is formed into which the lower end of the kneading tube 71 opens and to which a discharge line 41 with a control and measuring device 47 is connected, which is connected to a throttle 75 connected to the control device 7.

The material feed is the same as in FIG. 6. In normal operation, all of the feedstocks enter the mixing chamber 8, which is filled up to the overflow height 72 of the mixing tube 71. At the same time, air is blown through the double bottom 73 via the fan 74 and the adjustable air throttle 75 into the mixing chamber 8. By placing the individual components on the edge, reducing viscosity and intense vibrations, the homogenized mixture exits through the center of the mixing chamber 8 in the direction of the arrows 76, while at the same time sucking the air through the suction hood 77 to achieve excellent homogeneity. By raising and lowering the kneading tube 71, it is possible to control the size of the discharge floor 78, which is also advantageous in the discharge of residues. If a controlled outlet is provided in the space of the hopper floor 78, it can be controlled by computing means and / or quality sensor sensors according to qualitative values such as moisture, color, protein and raw fibers. In particular cases of use, for example in compound feed, it is possible to arrange, after the homogenizer 9, a warehouse of the mixed product which can be equipped with a circulation conveyor.

The homogenizer 9 of FIG. 1 and 4 has a horizontal longitudinal axis and the homogenizer 9 of FIG. 5, 6, 6A and 7 has a vertical longitudinal axis. Furthermore, the proposed solution allows for a number of other new combination possibilities, only some of which are schematically shown in the drawings.

Industrial usability

The mixing and homogenizing device is particularly well suited for mixing the flour ingredients, especially in the field of mills, feed mills, bakeries or, for example, in the preparation of raw materials in tourist establishments, at least in the case of ingredients which can be considered liquid to some extent.

Claims (12)

PATENT CLAIMS A mixing and homogenizing device, in particular flour, comprising a metering device, the outlet of which is connected to a mixing chamber, characterized in that the metering device consists of at least two dosing scales (4) and a weighing device, wherein at least one dosing scale (4) is designed as a differential flow regulator (6), to which a dosing scale (4) with a tubular cross-section is connected by a screw extractor (25) formed by a screw-type dispensing dispenser (5), the inlet of each dosing scale (4) a container (1) and the outlet of each dosing scale (4) is separately connected to the mixing chamber (8) to which the homogenizer (9) is connected to the discharge line (41), wherein at least one container (1) is connected to the drive unit (15) of the screw discharge dispenser (5), on the one hand with the electronics (13) of the weighing container (24), formed on the dosing scale (4) and on the other hand with the control device (7). Apparatus according to claim 1, characterized in that the weighing device is formed by at least one microdifferential dosing scale (16), the homogenizer (9) being formed by a tubular body (21) in which a vane shaft (19) with the blades (20) and the control device (7) are coupled to the drive (18) of the vane shaft (19). Device according to claim 1, characterized in that a horizontal screw (40) is placed between the mixture discharge pipe (41) and the homogenizer (9), to which is connected a vertical screw (42) opening into the container (43), the outlet line (46) of which is connected via a first pipe turnout (44) to both a discharge line (41) and a horizontal screw (40), the outlet line (46) being equipped with a metering flap (45) which is connected to a control device (7) to which a control and measuring device (47) is also connected, located between the homogenizer (9) and the horizontal screw (40), the weighing device being constituted by at least one microdifferential dosing scale (16). Device according to one of claims 1 to 3, characterized in that the homogenizer (9) has a horizontal longitudinal axis. Apparatus according to claim 1, characterized in that the weighing device is constituted by at least one differential dosing scale (16) and / or a mating scale (63) provided with a buffer store (64), wherein the mixing chamber (8) is formed as a combination unit, in which the mixing chamber (8) is provided with stirrers (50) and a homogenizer (9), the lower end of which is connected to a loading screw (53) located in the mixing chamber (8) and connected to a discharge line (41), on which a controllable flap (59) is connected, connected to the control device (7). Apparatus according to claim 5, characterized in that the homogenizer (9) is designed as a vibrating homogenizer (51), the upper end of which is provided with an overflow (56) which is connected via a monitoring and measuring device (47) on the one hand. a return line (57) with a mixing chamber entrance (8) and a line equipped with a discharge slider (58) to which a conveyor (60) is connected, connected to a second pipe turnout (61) located on the discharge line (41) wherein the monitoring and measuring device (47) and the discharge slide (58) are connected to the control device (7). Apparatus according to claim 1, characterized in that the weighing device is formed by at least one microdifferential dosing scale (16), wherein the mixing chamber entrance (8) and the homogenizer (9) are formed as a unit consisting of a pneumatic homogenizer (70). ), in which a kneading tube (71) is provided, provided with an overflow (72) at its upper end, wherein the pneumatic homogenizer (70) is equipped with an aspirator (77) at its upper end and a double blowing bottom (73) at its lower end. air from a fan (74) with a throttle (75), wherein the lower end of the mixing tube (71) opens into a regulated discharge bottom (78) formed below the double bottom (73) to which the discharge line (41) is connected with a control and a measuring device (47) connected to a throttle (75) connected to the control device (7). Device according to one of Claims 1, 5 to 7, characterized in that the homogenizer (9) has a vertical longitudinal axis. Apparatus according to claim 1, characterized in that each container (1) is provided with a discharge device (2) followed by a feeding screw (3) opening into the dosing scale (4). Apparatus according to claim 1, characterized in that the dosing scales (4) are arranged at substantially the same distance from the mixing chamber (8). Apparatus according to claim 1, characterized in that the dosing scales (4) are arranged at substantially the same height from the mixing chamber (8). Apparatus according to any one of claims 1 to 3, 5 and 7, characterized in that the microdifferential dosing scale (16) has a tubular cross-section and is equipped with a screw discharge dispenser.