EP0658409A2 - Mixing machine - Google Patents

Abstract

The invention relates to a mixing machine, in particular for producing mortar or paint, with a funnel-shaped supply container (3) for the powdery dry matter and with a conveying device (4) and mixing device (10) for discharging the dry matter from the supply container (3) whilst adding and mixing in water. In this arrangement, the conveying device (4) is arranged within the supply container (3), in the bottom region thereof, and is integral therewith. The mixing device (10) is arranged outside the supply container (3) on the latter. The supply container (3) has a lateral opening (9) into which the conveying device (4) opens and from which the mixing device (10) leads off. <IMAGE>

Description

The invention relates to a mixing machine for mixing a powdery dry substance, in particular dry mortar or dry color powder, with water, in particular with a funnel-shaped storage container for the powdery dry substance, and with a conveying and mixing device for discharging the powdery dry substance from the storage container with addition and mixing with water.

The particular field of application of the invention is a mixing machine for producing mortar and a mixing machine for producing paint. In the mortar mixing machine, water is added to the dry mortar and mixed with it, so that the required wet mortar is produced. The paint mixing machine starts with dry paint powder, which is mixed with water to produce the wet paint.

A mixing machine in the form of a mortar mixing machine of the type specified at the outset, using a small silo of, for example, 1.2 tons or larger, is used to produce the required wet mortar at the respective place of use. The known mortar mixer has a funnel-shaped storage container for receiving the dry mortar. A separate, tubular conveying and mixing device for discharging the dry mortar from the storage container while adding and mixing with water can be flanged to the lower discharge opening of the storage container. A disadvantage of this known mortar mixing machine is that the conveying and mixing device must be attached to the silo container as a separate part. This means long set-up times, because each time the storage container for the dry mortar is changed, the conveying and mixing device dismantled and then flanged to the new reservoir. In addition, in the case of the known mixing machine, the funnel-shaped silo outlet prevents evenly flowing bulk goods from slipping.

Proceeding from this, the object of the invention is to create a mixing machine of the type specified at the outset, which is easier to use.

As a technical solution , the invention proposes that the conveying device is arranged inside the storage container in the bottom area and integrated in this, and that the mixing device is arranged outside of the storage container, the storage container having a corresponding, in particular lateral opening in which the Conveyor opens and from which the mixing device starts.

This creates a continuously operating mixing machine, for example a mortar mixer, with an integrated storage container of, for example, 1.2 tonne capacity. The mortar mixing machine is suitable for all factory-mixed ready-mixed mortars, for example for lime-cement plasters, cement plasters, scratching plasters, fine plasters, structural plasters, fillers, adhesive mortars, reinforcing mortars. The advantage lies in the fact that the ready-mixed mortar can be fed directly to the mixing machine without the paper sacks previously used and having to be disposed of. The wet mortar can be applied to any mortar container or pump. The machine consists of one unit, which allows quick, convenient transportation with small, handy dimensions and low weight. The basic idea is to integrate all the necessary parts in order to convert the stored dry mortar into the state of use as wet mortar. The special design of the storage container with the conveying device ensures that the dry material continues to slide. The water is admixed in a technically simple manner during the discharge of the dry mortar from the storage container. The conveying device, in particular in the form of a conveying helix, is led to the outside through a corresponding connection or discharge nozzle, the mixing helix of the mixing device forming the continuation of the conveying helix of the conveying device.

A further development of the mixing machine according to the invention suggests that the conveyor device has a conveyor shaft with a screw conveyor. This represents a technically simple possibility for discharging the dry mortar stored in the storage container from the storage container and feeding it to the mixing device.

The conveying device preferably opens into a metering tube arranged in the region of the opening of the storage container. The dry substance is thus fed through the screw conveyor located in the storage container to a metering screw which conveys a constant amount of dry substance into the flanged mixing device.

A further development of the mixing machine according to the invention proposes that the mixing device has a mixer tube with a mixer shaft arranged therein and with a water supply. This creates a technically simple possibility of realizing the mixing device using a mixer tube. The required amount of water is fed to the mixing tube through an installed water metering system. The mixing shaft located therein then works up the mixture into the wet substance, for example wet mortar. The water supply is preferably controlled by means of a solenoid valve which is coupled to the control of the drive motor. This integrated control of the water metering represents a further possibility for the fully automatic operation of the mixing machine, so that operating personnel can be saved accordingly.

The mixing device can preferably be fastened as a separate component to the opening of the storage container. For this it is only necessary to provide the mixing device and the storage container with a corresponding coupling device. This applies equally to the conveyor spiral and to the mixing shaft, which must be able to be coupled accordingly so that the conveyor spiral drives the mixing shaft. For example, locking clamps can be used to fasten the mixing device to the storage container. At the end of the work, only the mixing tube has to be removed from the storage container and rinsed with water. The dry matter in the container can remain or be discharged through an appropriate emptying opening.

A further development of this suggests that the mixing device for the non-use state of the machine can be arranged below the hopper slope of the storage container in such a way that it does not protrude beyond the basic cross-sectional area limitation of the machine. One takes advantage of the fact that there is normally free space below a hopper slope, so that the separate mixing device can be fastened there when the machine is not in use, a corresponding fastening device being provided for this purpose. The type of arrangement and the length of the mixing device should be selected such that the mixing device does not protrude beyond the basic cross section of the machine and thus with regard to the pallet capacity of the Mixer doesn't bother. This creates a very compact machine that is also very easy to use.

A preferred development of the mixing machine according to the invention proposes that an additional, separate conveying and mixing device can be arranged essentially vertically at the mouth of the essentially horizontally arranged mixing device. This development has the advantage that, if necessary, the additional conveying and mixing device can be attached to the basic mixing device, so that the wet substance produced is exposed to the mixing tools for a longer and more intensive exposure. The mixing intensity can thus be increased in the downward area. At the same time, there is a better supply of the prepared mixture to the pump, because the supply to this pump is then supported in the downward region by gravity. In addition, since the additional conveying and mixing device runs essentially vertically, it increases the basic cross section of the mixing machine only insignificantly, so that it hardly disturbs.

The additional, separate conveying and mixing device can preferably be suspended. This has the advantage that the additional conveying and mixing device can be attached to the basic mixing device and then dismantled again without major technical measures.

A further development suggests that the mouth of the mixing device is on the underside. This has the advantage that the basic mixing device can also be operated without the additional conveying and mixing device. If the separate conveying and mixing device is then suspended in the basic mixing device, a corresponding feed connector comes to lie below the mouth of the basic mixing device, which feeds the wet substance to the actual conveying and mixing pipe.

A further development of the mixing machine according to the invention proposes that for the production of paint, whereby dry paint powder is mixed with water, the mixing device has a dough zone with a mixing and conveying device for the supplied dry paint powder and with a water supply arranged on the mixing and conveying device, furthermore has a grinding zone downstream of the dough zone for grinding the color powder mixed with the water and finally has an outlet downstream of the grinding zone for the finished color. Namely, it is known to produce liquid paint by mixing dry paint powder with water. This is currently done by adding dry paint powder together with water to a container and then stirred together until the liquid paint has its usual consistency, the mixing being done mechanically by means of an appropriate stirrer. However, it is disadvantageous that the paint can only ever be produced in small quantities. Above all, however, the known production process has the disadvantage that it is not possible to produce the liquid paint continuously, since so far the paint can only be mixed in portions. The development of the mixing machine according to the invention creates an automatically operating color mixer, by means of which a continuous production of color is possible, so that the supplied dry color powder can be applied continuously and without interruption, for example on a facade, after mixing with water. The basic idea of the manufacturing device according to the invention is that the dry color powder to be processed is first fed to the manufacturing device by means of an appropriate device. In a first step, the dry color powder is first mixed with water in the dough zone, so that a type of dough or porridge is formed, which is simultaneously fed to the downstream grinding zone during the mixing process, where the dough or porridge is then ground and thus homogenized in order to in this way to obtain the finished liquid color with the usual conventional consistency. This finished paint can then be discharged through the outlet, for example by pumping off the liquid paint and processing it immediately. According to the invention, this is a multi-stage system in which a dough or porridge is first produced, which is then made more uniform by a grinding process.

The dough zone preferably has a mixing and conveying tube with a shaft arranged therein and with the water supply. The shaft is thus rotatably mounted within the mixing and conveying tube and has corresponding mixing paddles or comparable devices for the mixing process and transport paddles for conveying the dough or slurry, for example in the form of inclined blades. Instead of this transport paddle, it is of course also conceivable to use other transport devices, for example a screw conveyor.

A further development of the manufacturing device according to the invention proposes that the water supply quantity can be controlled as a function of the color powder delivery quantity. This means that a well-dosed and fixed amount of water is always added to the conveyed paint powder, so that the paint automatically receives the desired water content.

In a preferred constructive embodiment of the grinding zone, this consists of a A large number of bodies which are moved toward one another and lie in a tight packing against one another, through which the pasted paint can be passed. The basic idea of the grinding device designed in this way is to provide a large number of loose bodies, which are moved against one another in particular by moving a corresponding receptacle. The bodies sliding against one another and rolling on one another thus define small grinding and mixing units between them, with the result that the colored paste or pulp is ground and mixed between the bodies, so that the liquid color is ultimately produced in a homogeneously uniform consistency. The degree of grinding and mixing naturally depends on the length of the grinding zone and the speed at which the paint passes.

The bodies are preferably spheres and consist, for example, of glass, metal, ceramic or another suitable solid material. The balls have the advantage that they can roll on each other very well and thus achieve an optimal grinding efficiency.

A further development of this suggests that the bodies are arranged in a rotatable, cylindrical drum, the two end walls each being formed by a perforated plate or sieve. The basic idea is therefore to fill such a drum with balls in particular and to set this drum in a rotational movement so that the balls are constantly moved and shifted and thus enable the grinding process. The drum will have a closed cylinder jacket, while the two end faces have openings, one end face serving as an inlet for the pasted paint and the other end face serving as an outlet for the finished liquid paint. The perforated plates or screens for the end walls have corresponding openings, the diameter of which is of course smaller than the diameter of the balls.

A preferred constructive design of the drum suggests that it is fixedly arranged on the shaft within the mixing and delivery pipe. This means that when the shaft in the dough zone rotates and the color paste or pulp is formed, the drum in the grinding zone rotates simultaneously and synchronously. The advantage is that the shaft forms a structural unit together with the drum, as does the mixing and conveying pipe, which is not only in the dough zone, but also in the grinding zone, where it is, however, compared to the dough zone for receiving the Drum has a significantly larger diameter.

A further development of the drum suggests that it be divided into segments, the partitions preferably consist of a perforated plate or sieve. The drum thus has radial partition walls with respect to the central axis, which divide the drum into individual chambers, in each of which there is a ball packing. The partitions can be provided with openings which allow the paint to pass through, but not through the balls. The advantage of the drum segments is that the balls have a certain spatial limitation in their respective segments. Above all, however, the drum segments have the advantage that the paint does not collect in the lower area due to gravity. Due to the segmentation, the drum is evenly filled with paint.

In an optional development, the grinding zone can have an additional water supply in order to further dilute the colored dough produced in the dough zone with water. This additional water supply can also be used to continuously clean the inlet face of the drum. Of course, this additional water input can also be dispensed with.

A further development of the manufacturing device for paint according to the invention proposes that an outlet nozzle of the outlet is rotatably mounted and the required fill level in the mixer can thereby be adjusted.

A further development suggests that an additional conveyor for the pasted paint powder is arranged between the dough zone and the grinding zone. This has the advantage that the colored powder pasted in the dough zone is fed to the grinding zone without the formation of dust, so that the pasted color powder is continuously removed.

The conveyor preferably consists of fixed and inclined shear blades. As a result, a shear zone with at least four shear blades is additionally created between the dough zone and the grinding zone. The pasted paint powder, which is rotating, experiences an axial component as a result of the shear blades, which are inclined with respect to the longitudinal axis of the shaft, which ensures that the pasted paint powder is transported forward. In order to achieve even transport, the shear blades are preferably evenly distributed around the entire circumference. The already mentioned additional water supply can also be located in the area of these shear blades.

Finally, it is proposed in a further development of the color mixer that between the An additional mixing and transport device is provided for the grinding zone and the outlet. This mixing and transport device can be formed by the continuous shaft, which is equipped with corresponding mixing and transport paddles.

A further development of the mixing machine according to the invention proposes that the water supply quantity can be controlled as a function of the dry substance delivery quantity. This means that the conveyed dry matter is always supplied with a well-dosed and fixed amount of water, so that by means of this integrated control the wet matter automatically receives the desired water content.

A further preferred development of the mixing machine according to the invention proposes that a refill container can be arranged above the storage container, the upper side of the storage container and the underside of the refill container having corresponding openings which can be connected to one another via a connecting line. This is a technically simple way to easily expand the dry matter supply to, for example, more than 2 tons, without the storage container (with its conveying and mixing device) having to be replaced with a new one. Rather, the reservoir can be refilled directly at the construction site by placing the full refill container on the reservoir, so that after opening the connecting line, the dry substance of the refill container can flow into the reservoir. After the refill container has been emptied and the storage container has been filled, the empty refill container can be removed again.

In a first alternative, the refill container is a container with fixed walls.

The connecting line is preferably a hose or an accordion-like tube. This represents a technically simple possibility to establish a connection between the refill container and the storage container by flanging the connecting pipe accordingly after opening the corresponding openings. This enables a jam-free transfer from the refill container to the storage container.

As an alternative to the refill container with the fixed walls, the refill container can also be a flexible container which can be suspended in a frame which can be fastened above the storage container. Such "big bags" for bulk goods are used as refill units or replenishment units from the production site, for example to a construction site. The advantage of these flexible containers is that they weigh very little, so that they only cause very low return costs for refilling when folded. The useful life of such a flexible container is approximately 5 years. The flexible container is suspended in a holder above the actual mixing machine. If necessary, the outlet hose of the container can then be opened to allow the material to flow into the storage container. The frame can preferably be adapted to the length of the container by means of extendable feet. For the dust-free and watertight transfer from the flexible container, a transition piece is preferably placed on the top opening of the storage container. The double outlet hose of the container protrudes into the interior of this transition piece and, on the other hand, it is placed over the transition piece on the outside. Slipping is prevented by means of a so-called bag buckle.

Another preferred development suggests that the machine has a frame with a uniformly rectangular cross section over its entire height. This means that the mixing machine can be used on pallets and in high storage. It is accessible on all four sides with a forklift and can be handled with a hand pallet truck. The mixing machine can be transported with all common lifting trucks, forklifts or cranes. Due to the Euro pallet dimensions (80 x 120 cm), the truck loading areas and high-bay storage areas can be optimally used. Extendable feet of the frame must be pushed in for transport on a truck or a trailer. This eliminates the need for an additional transport lock due to the low center of gravity.

Finally, a further development of the mixing machine according to the invention proposes an integrated probe control with a sensor / button for controlling the required wet mortar. This creates a possibility that the mixer works fully automatically and no operating personnel is required.

Fig. 1

eine Seitenansicht einer Mörtelmischmaschine;

Fig. 2

einen Längsschnitt durch die Mörtelmischmaschine in Fig. 1;

Fig. 3

in vergrößertem Maßstab eine Stirnansicht der Mörtelmischmaschine in Fig. 1;

Fig. 4

eine Rückansicht der Mörtelmischmaschine in Fig. 1;

Fig. 5

eine Draufsicht auf die Mörtelmischmaschine;

Fig. 6

einen draufsichtigen Schnitt auf die Mörtelmischmaschine in Fig. 1 oberhalb der Förder- und Mischeinrichtung;

Fig. 7

eine Seitenansicht einer etwas modifizierten, erweiterten Ausführungsform der Mörtelmischmaschine in Fig. 1;

Fig. 8

eine Seitenansicht der Mörtelmischmaschine mit einem flexiblen Nachfüllbehälter;

Fig. 9

eine Detailausschnitt der Mischmaschine im Bereich des vorderen Endes der Mischeinrichtung mit einer zusätzlichen, eingehängten sowie vertikalen Förder- und Mischeinrichtung;

Fig. 10

eine Längsschnittdarstellung einer Farbherstellungsvorrichtung für die Mischeinrichtung;

Fig. 11

einen Querschnitt durch die Vorrichtung in Fig. 10 im Bereich der Trommel;

Fig. 12

eine Querschnittdarstellung im Bereich der Schermesser.

Exemplary embodiments of a mixing machine according to the invention are described below with reference to the drawings. In these shows:

Fig. 1

a side view of a mortar mixing machine;

Fig. 2

a longitudinal section through the mortar mixing machine in Fig. 1;

Fig. 3

an enlarged view of an end view of the mortar mixing machine in Fig. 1;

Fig. 4

a rear view of the mortar mixing machine in Fig. 1;

Fig. 5

a plan view of the mortar mixing machine;

Fig. 6

a top view of the mortar mixing machine in Figure 1 above the conveyor and mixing device.

Fig. 7

a side view of a slightly modified, expanded embodiment of the mortar mixing machine in Fig. 1;

Fig. 8

a side view of the mortar mixing machine with a flexible refill container;

Fig. 9

a detailed section of the mixing machine in the region of the front end of the mixing device with an additional, suspended and vertical conveying and mixing device;

Fig. 10

a longitudinal sectional view of a paint manufacturing device for the mixing device;

Fig. 11

a cross section through the device in Figure 10 in the region of the drum.

Fig. 12

a cross-sectional view in the area of the shear knife.

1 to 6 show the basic version of a mortar mixing machine, while an extension form is shown in FIGS. 7 and 8. 9 shows an additional device, while FIGS. 10 to 12 show a mixing device in the form of a paint production device.

The basic version of the mortar mixing machine shown in FIGS. 1 to 6 has a rectangular frame 1 in Euro-pallet size (80 x 120 cm) and is stackable. This frame 1 has feet 2 which can be pulled out to different heights and which are shown in broken lines. This means that any standard mortar pump and other vessels of different heights can be loaded. Inside the frame there is a funnel-shaped storage container 3, which tapers conically downwards, as can be seen in particular from the illustrations in FIGS. 2 to 4. The two inclined walls have a different one Inclination angle. The slipping of the dry mortar is guaranteed. In addition, the storage container 3 has a level indicator. This storage container 3 also serves as a transport container. A conveyor device 4 with a screw conveyor 5 is arranged in the bottom region of this storage container 3. This screw conveyor 5 is driven by an electric motor 6, which is located in the axial direction of the screw conveyor 5 below the hopper slope of the storage container 3 and is in particular within the circumferential contour of the frame 1. This screw conveyor 5 opens into an interchangeable metering tube 7 with a metering screw 8, namely following an opening 9 formed laterally in the storage container 3. Outside of the storage container 3, a mixing device 10 with a mixer tube 11 with a mixer shaft 12 therein is fastened to the opening 9. The mixer tube 11 is further provided with two water inlets 13. The corresponding water connection lines are not shown. The upper side of the storage container 3 also has a cover 14 which closes a corresponding opening 15 on the upper side of the storage container 3.

The mortar mixing machine designed in this way and shown in FIGS. 1 to 6 functions as follows:

When the mortar mixer is not in use, the mixing device 10 with the mixer tube 11 and the mixer shaft 12 located therein is removed and fastened below the hopper slope of the storage container 3, as indicated in FIG. 3. All necessary components are therefore housed in the device with e-pallet size for transport or operation. In particular, there are no protrusions during transport. In addition, optimal space and weight utilization on transport vehicles is guaranteed. Due to a low center of gravity and a constant cross-section, no transport lock is necessary. After filling the storage container 3 with dry mortar, the entire mortar mixing machine is set up at the point of use, and the mixing device 10 is fastened to the opening 9 of the storage container 3 by means of a closure clamp 16, as can be seen in particular in FIG. 6. The mixer shaft 12 is also coupled to the screw conveyor 5. In addition, the water pipe is connected to the water supply 13.

To operate the mortar mixing machine, the screw conveyor 5 is set into a rotary movement by means of the electric motor 6. In addition, the drive motor can be removed via a quick release and a swivel joint. The dry mortar is fed through the screw conveyor 5 to the metering screw 8. The metering screw 8 delivers a constant amount of dry mortar into the flanged mixer pipe 11 of the mixing device 10.

The required amount of water is supplied to the mixer tube 11 by the installed water metering system. The mixer shaft 12 located therein works the mixture into wet mortar, which is discharged through the mixer pipe opening. The water supply is controlled by means of a solenoid valve which is coupled to the control of the electric motor 6. Thanks to an integrated probe control, the mortar mixing machine can work fully automatically, with a filler / button taking control of the required wet mortar, which can be placed in any mortar container or pump. Operating personnel are therefore not required. At the end of work, only the mixer pipe 11 has to be dismantled and rinsed with water. The dry mortar in the storage container can remain there or is discharged through an emptying opening. If only dry mortar is required for processing, only the water supply has to be switched off.

The mortar mixing machine can be transported with all standard pallet trucks, pallet trucks and cranes. The adherence to the Euro pallet dimensions (80 x 120 cm) ensures optimal utilization of the truck loading areas as well as high shelf storage capacity. For transport on a truck or a trailer, only the extendable feet 2 have to be inserted. The mixer can be transported from all sides with all industrial trucks. In internal logistics, it can be transported with a roller conveyor and chain conveyor for automatic filling. Due to the low center of gravity, an additional transport lock is not necessary. The mixing and electric drive can be easily dismantled for quick cleaning and emptying. Finally, the mixer can also be used in the rain without additional cover.

7 shows a further development of the mortar mixing machine. The mortar mixing machine itself does not differ from that as has been shown in FIGS. 1 to 6 and has been described accordingly. The difference consists in an additional refill container 17, which can be placed on the frame 1 of the actual mortar mixing machine, as can be seen in FIG. 7. This refill container 17 has a corresponding cross-sectional shape suitable for pallets.

The refill container 17 has an opening 18 on the underside. This lies above the opening 15 of the storage container 3 after the corresponding cover 14 has been opened. The connection between the refill container 17 and the storage container 3 takes place via a connecting line in the form of an accordion-like tube. This is fixed at the opening 18 of the refill container 17 and is pulled downwards flanged on the opening 15 of the storage container 3 accordingly.

This somewhat modified embodiment works as follows:

Already during the operation of the mortar mixing machine, the refill container 17 can be placed on the frame 1 in the manner shown. The connection is made via the connecting line 19 to the storage container 3. If necessary, the dry mortar located in the refill container 17 can then be opened into the storage container 3 by opening a corresponding flap. After the refill container 17 is empty, it is removed and, if necessary, replaced by a filled one. Thus, by combining the storage container 3 with the refill container 17, the supply of dry mortar can be expanded to over 2 tons.

8 shows a somewhat modified embodiment of the variant with the refill container 17. In this variant, the refill container 17 is designed as a flexible container which can be suspended in a frame 20 which can be fastened above the storage container 3. This flexible container for bulk goods is usually used as a replenishment unit from the production site to the construction site, whereby it consists of a light-resistant and waterproof material and has the great advantage that it has only low return transport costs for refilling when folded, the useful life being about 5 years lies. For the dust-free and watertight transfer from the flexible refill container 17 into the storage container 3, a transition piece 21 is placed on the storage container 3. The outlet hose 22 of the flexible refill container 17 is double and protrudes into the interior of the transition piece 21 and on the other hand it is placed over the transition piece 21 on the outside. Slipping of the outlet hose 22 on the transition piece 21 is prevented by means of a bag buckle 23.

9 shows an additional device for the mixing machine and in particular for the mixing device 10. This is a separate, additional conveying and mixing device 24, which can be attached to the front end of the mixer tube 11 of the mixing device 10. For this purpose, a tube 25 of the conveying and mixing device 24 is suspended vertically aligned by means of a cross rod 26 in an upper receiving groove 27 of the mixer tube 11. Since the mouth 28 of the mixer tube 11 is located on its underside, the tube 25 has a corresponding nozzle 29, by means of which the material emerging through the mouth 28 is fed to the actual tube 25 of the conveying and mixing device 24. The advantage of the arrangement of the mouth 28 is that the mixing device 10 without problems even without the additional conveying and Mixing device 24 can be operated.

The conveying and mixing device has on the inside a shaft 30 with mixing and conveying elements 31, the shaft 30 being driven by a separate motor 32, optionally an electric motor or hydraulic motor, which is arranged on the top of the pipe 25 so as to be pivotable, in order to secure the Operating position a quick coupling 33 is used. As a result, the interior of the additional conveying and mixing device 24 can be cleaned without problems. On the underside, the pipe 25 also has a discharge connection 34, to which, for example, a pump can be connected.

The advantage of this additional conveying and mixing device 24 is that the mortar is subjected to a longer and more intensive exposure to the mixing tools, so that the quality of the mortar is improved. Since the conveying and mixing device runs in the vertical direction, the cross section of the mortar mixing machine increases only insignificantly. In particular, the additional conveying and mixing device 24 is not disruptive.

Finally, FIGS. 10 to 12 show a modified embodiment of the mixing device 10, which is used for the production of paint, with dry paint powder being mixed with water. The dry paint powder is located in the storage container 3 and is fed to the mixing device 10, which can be fastened to the storage container 3 in the same way as in the mortar mixing machine. The advantage of this color mixing machine is that the dry color powder can be transported to the respective place of use by means of the storage container 3 in order to then produce the actual liquid color there. This represents a great saving in weight.

The mixing device 10 for producing paint has a dough zone 51, a shear zone 52, a grinding zone 53 and finally an outlet 54 one after the other. In this case, a shaft 56 is rotatably mounted in a common mixing and delivery pipe 55 and is set in rotation by a corresponding drive. In the area of the shear zone 52 and grinding zone 53, the mixing and delivery pipe 55 has a significantly larger diameter than in the dough zone 51.

In the dough zone 51, the shaft 56 has mixing and delivery paddles 57 within the mixing and delivery pipe 55. Furthermore, the mixing and delivery pipe 55 is equipped with two water inlets 58. The shaft 56 with its mixing and conveying paddles 57 form a mixing and conveying device 59 for the supplied dry paint powder.

In the area of the shear zone 52, the mixing and delivery pipe 55 has in the area of the inside end wall wing-like and inclined shear blades 60, which are evenly distributed around the circumference. These shear knives 60 define a conveying device 61 for the colored powder pasted from the dough zone 51 to the subsequent grinding zone 53.

The grinding zone 53 is formed by a cylindrical drum 62 which is fixed on the shaft 56. While the cylinder jacket surface of this drum 62 is closed, the two end walls 63 of the drum 62 are each provided with openings and formed, for example, by a perforated plate or a sieve. In the interior of the drum 62 there are also radial partition walls 64, which are likewise formed by perforated plates and divide the drum into individual segments 65. These are each filled with balls 66 made of glass, metal, ceramic or another suitable hard material. The diameter of these balls 66 is of course larger than the diameter of the openings in the end walls 63 and in the partition walls 64. Finally, the mixing and delivery pipe 55 in the area of the grinding zone 53 also has two water feeds 67, which, however, do not necessarily have to be present.

The outlet 54 is formed by a flanged outlet nozzle 68 which is rotatably mounted so that the required fill level in the mixer can be adjusted. In addition, the outlet 54 is equipped with a hitch for a pump.

Inside the outlet connection 68, the shaft 56 is provided with mixing and transport paddles 69 which define an additional mixing and transport device 70.

The color mixer works as follows:

The shaft 56 with its mixing and conveying paddles 57, 69 and with its drum 62 is rotated so that the paint mixer is in the operating state. Dry paint powder is supplied to the dough zone 51, which is indicated schematically by the arrow P. The dry paint powder is gripped by the mixing and conveying paddles 57 and mixed with the water supplied through the water supply 58 and thereby fed to the shear zone 52. In this dough zone 51, the metered amount of color powder is fed with so much water that a dough is formed which is mixed by the mixing and conveying paddles 57.

This slurry enters the shear zone 52 and is conveyed forward by the fixedly arranged and inclined shear blades 60, so that the slurry passes through the end wall 63 in the form of the perforated plate into the segments 65 of the drum 62. Water can be fed in further via the water feeds 67, so that a slurry is formed.

In the segments 65 of the drum 62, by constantly circulating the balls 66, the pulp is ground and mixed so that the liquid color is produced after homogenization. This liquid paint passes through the outlet-side end wall 63 of the drum 62 and arrives there in the mixing and transport device 70 in the outlet 54, from where the finished liquid paint can be pumped off and fed to the point of use.

Reference list

1

frame

2nd

foot

3rd

Storage container

4th

Conveyor

5

Auger

6

Electric motor

7

Dosing tube

8th

Dosing screw

9

opening

10th

Mixing device

11

Mixer tube

12th

Mixer shaft

13

Water supply

14

cover

15

opening

16

Locking clamp

17th

Refill container

18th

opening

19th

Connecting line

20th

frame

21

Transition piece

22

Outlet hose

23

Bag buckle

24th

Conveying and mixing device

25th

pipe

26

Crossbar

27

Groove

28

muzzle

29

Support

30th

wave

31

Mixing and conveying elements

32

engine

33

Quick coupling

34

Discharge pipe

51

Dough zone

52

Shear zone

53

Grinding zone

54

Spout

55

Mixing and delivery pipe

56

wave

57

Mixing and conveying paddles

58

Water supply

59

Mixing and conveying device

60

Shear knife

61

Conveyor

62

drum

63

Front wall

64

partition wall

65

segment

66

Bullet

67

Water supply

68

Outlet connection

69

Mixing and transport paddles

70

Mixing and transport device

P

Feeding the dry color powder

Claims (29)

Mixing machine for mixing a powdery dry substance, in particular dry mortar or dry color powder, with water
with an in particular funnel-shaped storage container (3) for the powdery dry substance
and with a conveying and mixing device (4, 10) for discharging the powdery dry substance from the storage container (3) with addition and mixing with water,
characterized by
that the conveying device (4) is arranged within the storage container (3) in the bottom region thereof and is integrated therein, and
that the mixing device (10) is arranged outside the storage container (3) on the latter,
wherein the storage container (3) has a corresponding, in particular lateral opening (9) in which the conveying device (4) opens and from which the mixing device (10) extends. Mixing machine according to claim 1,
characterized,
that the conveyor (4) has a conveyor shaft with a screw conveyor (5). Mixing machine according to claim 1 or 2,
characterized,
that the conveyor (4) opens into a metering tube (7) arranged in the region of the opening (9) of the storage container (3). Mixing machine according to one of claims 1 to 3,
characterized,
that the mixing device (10) has a mixer tube (11) with a mixer shaft (12) arranged therein and with a water supply (13). Mixing machine according to one of claims 1 to 4,
characterized,
that the mixing device (10) can be fastened as a separate component to the opening (9) of the storage container (3). Mixing machine according to claim 5,
characterized,
that the mixing device (10) for the non-use state of the machine below the hopper slope of the storage container (3) can be arranged such that it does not protrude beyond the basic cross-sectional area of the machine. Mixing machine according to one of claims 1 to 6,
characterized,
that at the mouth (28) of the essentially horizontally arranged mixing device (10) optionally an additional, separate conveying and mixing device (24) can be arranged essentially vertically. Mixing machine according to claim 7,
characterized,
that the additional, separate conveying and mixing device (24) can be suspended. Mixing machine according to claim 7 or 9,
characterized,
that the mouth (28) of the mixing device (10) lies on the underside thereof. Mixing machine according to one of claims 1 to 9,
characterized,
that the mixing device (10) for the production of paint, whereby dry paint powder is mixed with water
a dough zone (51) with a mixing and conveying device (59) for the supplied dry paint powder and with a water supply (58) arranged on the mixing and conveying device (59),
Furthermore, a grinding zone (53) downstream of the dough zone (51) for grinding the color powder mixed with the water
and finally has an outlet (54) downstream of the grinding zone (53) for the finished color. Mixing machine according to claim 10,
characterized,
that the dough zone (51) has a mixing and delivery pipe (55) with a shaft (56) arranged therein and with the water supply (58). Mixing machine according to claim 10 or 11,
characterized,
that the amount of water can be controlled depending on the amount of paint powder delivered. Mixing machine according to one of claims 10 to 12,
characterized,
that the grinding zone (53) consists of a plurality of bodies which are moved towards one another and lie in a tight packing against one another, through which the pasted paint can be passed. Mixing machine according to claim 13,
characterized,
that the bodies are balls (66). Mixing machine according to claim 13 or 14,
characterized,
that the bodies are arranged in a rotatable, cylindrical drum (62), the two end walls (63) each being formed by a perforated plate or sieve. Mixing machine according to claims 11 and 15,
characterized,
that the drum (62) within the mixing and delivery pipe (55) on the shaft (56) is fixedly arranged. Mixing machine according to claim 15 or 16,
characterized,
that the drum (62) is divided into segments (65), the partitions (64) preferably consisting of a perforated plate or sieve. Mixing machine according to one of claims 10 to 17,
characterized,
that the grinding zone (53) has an additional water supply (67). Mixing machine according to one of claims 10 to 18,
characterized,
that an outlet nozzle (68) of the outlet (54) is rotatably mounted and the required fill level in the mixer can thereby be adjusted. Mixing machine according to one of claims 10 to 19,
characterized,
that between the dough zone (51) and the grinding zone (53) an additional conveyor (61) for the pasted paint powder is arranged. Mixing machine according to claim 20,
characterized,
that the conveyor (61) consists of fixed and inclined shear blades (60). Mixing machine according to one of claims 10 to 21,
characterized,
that an additional mixing and transport device (70) is provided between the grinding zone (53) and the outlet (54). Mixing machine according to one of claims 1 to 22,
characterized,
that the water supply quantity is controllable depending on the dry substance delivery quantity. Mixing machine according to one of claims 1 to 23,
characterized,
that a refill container (67) can be arranged above the reservoir (53), the top of the reservoir (53) and the underside of the refill container (67) having corresponding openings (65, 68) which can be connected to one another via a connecting line (69) . Mixing machine according to claim 24,
characterized,
that the refill container (17) is a container with solid walls. Mixing machine according to claim 24 or 25,
characterized,
that the connecting line (19) is a hose or an accordion-like tube. Mixing machine according to claim 24,
characterized,
that the refill container (17) is a flexible container which can be suspended in a frame (20) which can be fastened above the storage container (3). Mixing machine according to one of claims 1 to 27,
characterized,
that the machine has a frame (1) with a uniformly rectangular cross section over its entire height. Mixing machine according to one of claims 1 to 28,
marked by
an integrated probe control with a sensor / button to control the required wet substance.

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