WO2011061176A2 - Plaster mixing device and method for variably forming plaster - Google Patents

Abstract

The invention relates to a plaster mixing device and to a method for variably forming plaster. The invention relates to a method for producing a finishing grout. A multi-component dry grout can be converted into a workable state for plastering work by adding mixing water by means of at least one automatic metering mixing device, such as a plaster machine, having at least one mixing container. In order to promote processing, at least one liquid additive can be introduced into the mixing water prior to adding same to the multi-component dry grout in the mixing container for preparing the mixing water for addition to the dry grout, such as a retarding agent or an accelerating agent, such as a tartaric acid solution, by means of at least one automatic metering device. The invention further relates to a metering device, to a plaster machine, and to a plaster meter.

Description

 Putzmischgerät and method for variable plastering

The invention relates to methods for producing a processing mortar. The invention also relates to a metering device and a corresponding cleaning machine, can be made with the processing mortar, mixed or turned on. Furthermore, the invention relates to a use of a metering device according to the invention or a corresponding Putzdosierers.

The method preferably utilizes a multi-component dry mortar, preferably a two-component dry mortar, for example gypsum or cement-based, such as concrete, plaster, screed. By means of at least one automatically metering mixing device, such as a plastering machine, with at least one mixing container, the dry mortar is converted into a processable for cleaning work with the addition of a mixed water.

Furthermore, the invention relates to a metering device for metering and admixing at least one preferably liquid additive, such as a retarder or an accelerator. The admixture is made to a mixed water for producing a processing mortar comprising a multi-component dry mortar, preferably a two-component dry mortar, for example, gypsum, lime or cement-based, such as concrete, plaster, screed, in a housing. The housing is preferably an encapsulated or even movable or height-adjustable housing that is suitable for construction sites. The housing is equipped with an inlet and an outlet connection and with a flow meter for the mixed water and with a metering component for the at least one liquid additive.

The use of a metering device according to the invention can be done to order a mineral cover on a building.

Furthermore, the invention relates to a plastering machine for producing a processing mortar. The plastering machine converts a multicomponent dry mortar, preferably a two-component dry mortar, for example on gypsum or cement base, such as concrete, plaster, screed, with at least one mixing container in a processable for cleaning work with the addition of a mixed water.

Furthermore, the invention relates to a Putzdosierer. State of the art

Methods and devices for so-called "Anmachen", which can also be referred to as "mixing", of mortar have been around for many years. Here, a distinction must be made between the stationary machines and the mobile cleaning machines. The stationary machines are used to produce prefabricated components, such as gypsum fiberboards, which can be processed by prefab workers as prefabricated components in construction sites on site. With the mobile machines, such as plastering machines, construction crews, consisting of several construction workers, such as cleaning crews, facilitate the mixing of building materials, such as a plaster or a screed, on site.

From the numerous literature available, DE 1 784 657 A1 (Applicant: Ferma, filing date: 02.09.1968) can be cited as a description of a production method of plasterboard in which the processing of the building material gypsum by the addition of additives to the conditions the formation of moldings is adjusted. The general conditions which can be optimized with regard to the processing conditions in a plant, such as, for example, batch selection, can generally not be transferred to the harsh conditions on construction sites, in particular the works created in the construction work.

As a description of a conventional plastering machine, reference may be made to DE 25 43 379 A1 (Applicant: Mathis Fertigputz GmbH, filing date: 29.09.1975), which already indicates numerous problems which can be found on construction sites. The dry mortar to be supplemented with water is mixed in the plastering machine. In order to ensure that the moisture content is as homogeneous as possible, it is proposed in the document not to completely fill the mixing chamber, but to leave the degree of filling of the mixing chamber as equal as possible. From this, the skilled artisan removes that a builder for filling the plastering machine or Putzmischgerätes is set off, which is to fill the often in 25-kg or 35-kg heavy bags present dry mortar mixtures as continuously as possible in the plastering machine or in the plaster mixing.

In addition to the manual, bagging of the plastering machine or Putzmischgerätes by a builder, it is also common, especially on larger sites, that the dry plaster is stored in a silo on the site and automatically introduced if necessary in the mixing chamber of the cleaning machine. In a known plastering machine the amount of water adjusted to the amount of plaster is added automatically and blended with the plaster in the plastering machine.

The dry mortar mixtures must first be brought into a processable state, which should then be present in a form of a processing mortar.

The dry mortar mixture used, such as plaster, is usually already admixed in the factory with a retarding agent in pulverulent form. That is, this dry mortar mixture has a certain base delay. Manufacturers of dry mortar mixes may adjust this base delay to the medium prevailing ambient temperatures over the course of the year. Disadvantageously, the factory default base delay in use on the site no longer quality assured, especially not automated, are affected.

Thus, while on construction sites, the construction crew of the builders at different points within the building or construction site with often noisy mixing devices that make communication difficult to rely on a well coordinated work, the responsible for the filling of the cleaning machine builders also still keep the degree of filling and the moisture content of the mortar or the screed in the mixing chamber under control. That it can always come here to disagreements, is easy to understand even for non-builders.

invention description

There is therefore a need for methods and devices for dressing of processing mortars, on the one hand allows easy processing of the mortar, especially for mixed-language building columns, on the other hand, a product-specific mixing of the mortar.

Further, there is a need for methods and apparatuses for dressing processing mortars that permit the processing quality of the mixed mortar to be adapted to the custom operations at a processing site, such as a jobsite.

It is also desirable if the quality of processing mortars is not compromised when being mixed by certain conditions that change during work, in order to be able to guarantee the product properties of the processing mortar desired by the user for a total construction site requirement quantity of the processing mortar to be processed.

The object of the invention is achieved by a method according to claim 1. An advantageous metering device can be found in claim 6. How such a machine can be used according to claim 6, claim 10 can be found. A plastering machine according to the invention is defined in claim 1 1. An object solving plaster dispenser claim 12 is removable. Advantageous developments can be found in the dependent claims.

An inventive method allows the production of a processing mortar. The processing mortar comprises a multi-component dry mortar, preferably a two-component dry mortar. The multi-component dry mortar, for example, a mortar on gypsum, lime or cement-based, such. As concrete, plaster, screed be. The processing mortar is produced by mixing the multi-component dry mortar.

 The method uses at least one automatically metered mixing device, such as a plastering machine, to convert the dry mortar into a processing mortar. The mixing device has at least one mixing container. The dry mortar is converted by the process into a state workable for plaster work. The conversion takes place with the addition of a mixed water.

According to the invention, at least one liquid additive is introduced into the mixed water for the treatment of the mixed water. The admixing of the liquid additive in the mixed water is advantageously carried out in an embodiment "before" its addition to the multi-component dry mortar in the mixing container. "Before" in this context advantageously means before in time. "Vor" can also mean locally before in this context. "Vor" can also mean temporally and locally beforehand in this context. That is, "before" the introduction of the mixed water into the mixing chamber, the additive, which may be, for example, a tartaric acid solution, metered and adjusted to the amount of the mixed water added to the mixed water.

However, the vote does not favorably refer to the mixed water alone. The additive will also be advantageous to other factors such as the type of dry mortar used, the desired setting behavior of the plaster, and prevailing environmental variables such as ambient temperature Humidity or the type of masonry to be processed, added to the mixed water added.

The liquid additive may be, for example, a retarder or an accelerator. The liquid additive may be, for example, a tartaric acid solution. Alternatively, a wine vinegar can be used. Non-natural, chemically produced additives can also be used. The liquid additive may be, for example, a 40 percent tartaric acid solution. In one embodiment, the percentages may be percent by volume. The percentages may be percentages by weight in another embodiment. Advantageously, the liquid additive is introduced into the mixed water by means of at least one automatic metering device.

In a further variant of a method according to the invention, at least one liquid additive, such as a retarder or an accelerator, is introduced into the mixing vessel of the mixing device independently of a feed line of the mixed water. The introduction of the liquid additive is advantageously carried out by means of at least one automatic metering device.

By a method of manufacturing a processing mortar according to the present invention, the processing property of the mixed dry mortar product can be desirably customized.

The invention also relates to a corresponding metering device. The metering device is used for metering and admixing at least one liquid additive, such as a retarder or an accelerator, to a mixed water. As a result, processing mortar is prepared, which starts from a multi-component dry mortar, preferably a two-component dry mortar, for example, gypsum, lime or cement-based, such as concrete, plaster or screed.

The metering device has a housing. The metering device is a machine enclosed by its housing. The housing is therefore preferably encapsulated. In addition, the housing is preferably movable, for example, moved on rollers. The rollers can be arranged on the underside of the housing. It is advantageous if the rollers are as coarse, so Baustellenfest are. The housing is preferably height adjustable. As a result, the metering device can reach advantageous sites on construction sites. The metering device has an inflow port. Also, the metering device may have a drain port. The metering device advantageously has a flow meter. With the flow meter, the mixed water can be measured. The metering device has a metering component for the at least one liquid additive. A calculation with data of the flow meter leads to the adjustment of the dosage, thus to the adjustment of the dosing component.

The dosage adjustment is also influenced by other factors, such as the desired setting behavior of the rendering material, the temperature and humidity ratios prevailing on the construction site, the type of masonry or the product-specific properties of the dry mortar used.

The said components of the metering device work together so that a predeterminable mixing ratio between liquid additive and dry mortar within a mixing parameter band is maintained. The maintenance of the mixing ratio within a mixing parameter band is independent of the respective at an inflow port of the prevailing water pressure in the mixing water. In other words, the metering of the liquid additive is carried out by the metering device as a function of the prevailing at the inflow port of the mixed water water pressure. The water pressure prevailing at the inflow connection of the mixed water is taken into account by the metering device during the metered addition of the liquid additive into the mixed water such that a predeterminable mixing ratio between liquid additive and dry mortar within a mixing parameter band can be maintained. The invention also includes a use of a metering device according to the invention for applying a mineral cover to a building. Mineral coverings are z. As plasters based on sand, quartz, lime, cement, gypsum or other conventional cleaning ingredients. The order is made depending on a processing progress. The order is carried out with the aid of a continuously dosed additive, such as a tartaric acid solution. Advantageously, a processing property of the cover, such as the curing behavior of the cover, is varied. Advantageously, the variation of the processing property of the cover is made according to the user's request. After setting the user default, the set processing property is maintained by the metering device. The variation of the processing property is favorably made in terms of a curing speed. An additive may also be referred to as an additive. Further advantageous embodiments can be found in the following explanations.

In one embodiment of the method according to the invention, the amount of the liquid additive to be metered in units per liter of mixed water is determined by means of a calculation. The amount of the liquid additive to be metered is introduced into the mixing container in a calculated amount. The quantity calculation makes it possible to add a processing mortar with customer-specific or user-specifiable consistency and predefinable processing properties. If a construction crew wants to process quickly drying plaster, they can easily adjust it. If a client wants to know how to process mixtures which dry as slowly as possible, then this too can be accomplished with the aid of the metering device or the metering process.

In a further embodiment of the method according to the invention, the processing properties of the processing mortar can be variably adjusted in time by the admixture of the liquid additive. To ensure long-term stability, the liquid additive is added by means of the automatic dosing device.

It is particularly advantageous that the metering device can respond to changes. Should it change in the course of processing, eg. B. the amount of water or the ambient temperature, etc. come, the metered amount is automatically adjusted so that the desired processing properties are still met.

Advantageously, the processing properties of the prepared processing mortar are varied in the course of a processing operation adapted to a processing speed. As a result, it is conveniently possible to adapt the processing quality of the mixed mortar to the customer-specific operations at a processing location, such as a construction site. Should it come to a halt in the course of processing in the processing operations, z. B. because more complicated designed surfaces such as bay windows, curves or window reveals are covered with plaster, it can be set instantly on the dosing another processing time. As soon as large sections are to be plastered again or large screed surfaces are to be laid, it is possible to operate with other processing properties. The processing properties include, for example, the curing time of the processing mortar. Advantageously, when using the method according to the invention by the adjustability of the processing properties, such as the curing time, of the mixed multi-component dry mortar, a temporally predeterminable surface image of the processing mortar can be produced. The appearance of the processing mortar in the surface can be adjusted.

A temporally predeterminable surface image may be, for example, a constant area image. The constancy refers primarily to the flat constant appearance of, preferably applied to a wall, processing mortar. An area-constant appearance is in particular an appearance without stains. Avoiding staining is a quality feature of a processing mortar, which is desired by many plaster processors.

In one embodiment of the dosing device according to the invention, the maintenance of the predefinable mixing ratio is automated. In a further embodiment of the dosing device according to the invention, the maintenance of the predefinable processing properties is automated. The automation can take place at least in part by detecting the flow rate measured by the flow meter through a microcomputer system. The automation can be carried out at least partially by means of the metering component, which can be controlled by the microcomputer system, by means of the metering of the liquid additive coordinated with the flow rate and the type of multicomponent dry mortar. In the automation can also, advantageously additional, received additional parameters such. As the temperature conditions, humidity, etc., so that an adjusted to environmental parameters dosage done by the automation.

Advantageously, the mixing of the mixed water and the at least one liquid additive downstream of a Zudosierstelle by means of a homogenizing agent, such as a mixing screw, homogenizable. In other words, the mixing is realized by means of the homogenizing agent. A mixing screw can also be called a mixing spiral.

In one embodiment of the metering device according to the invention, the type of multi-component dry mortar, such as gypsum plaster, can be stored in the microcomputer system by means of an RFID reading device. By the non-contact Data collection by means of RFID can also be addressed on batches, construction site characteristics and individual wishes of the users.

If the dosing device according to the invention is used, plaster of high quality and uniformity can be applied to walls, ceilings and floors even under the harsh environmental conditions of construction sites.

By mixing by means of automatically metering mixing devices (eg., In the form of cleaning machines) is in the treatment with water, the liquid additive component, the additive, in one embodiment by means of a Proportionaldosiergerätes in the mixing water before the mixing process or directly into the actual mixing container the mixer, so where dry mortar and water are brought together, introduced. By this type of metering of liquid components, the processing property, eg. As the curing time, mixed with water dry mortar product regulated or determined.

The curing time is determined not only with the metered amount of the mixed water, but also by the additive.

In an advantageous embodiment, there is a calculation unit for the dosing adjustment. The calculation unit advantageously receives data from different sources. Suitable sources are water pressure, water flow, water temperature, air temperature, humidity, level, date and time of processing and location, the z. B. is collected by GPS data. At least one of these data sources should be measured and processed to obtain a particularly advantageous finish.

A cleaning machine according to the invention has a metering device for metering a liquid additive. The metering device of the plastering machine is designed in particular as described above. The metering device is preferably integrally installed with the plastering machine. The integration of the metering in the plastering machine allows compact, easy to deploy at the job and with little effort functional units.

The dosing automatically performs the treatment of the mixed water by means of a liquid additive. The treatment of the mixed water is preferably carried out by a method as described above. Such a preparation advantageously allows a, in particular quality-assured, production of a custom, high quality processing mortar, the z. B. is mixed directly on site on a construction site.

An inventive Putzdosierer advantageously has a break device. Such a breaker may, for. B. be a check valve. In a preferred embodiment, the cleaning doser is equipped with a metering device which has already been described in parts previously. The interruption device automatically interrupts a mixed water flow under certain predeterminable conditions. For this purpose, the valve z. B. spent in a closed position. The specifiable conditions may occur in response to the failure of a component of the Putzdosierers. The failure could z. B. relate to a dosing. An automatic interruption could z. B. also occur in the event of a shortage of one of the liquid additives in the Putzdosierer, z. B. when the existing additive has been consumed for mixing processing mortar.

By interrupting the mixed water flow advantageously the cleaning process is interrupted. This makes it possible to prevent the application of a processing mortar without retarder or accelerator. The application of a processing mortar without retarder or accelerator would inevitably lead to an undesirable change in processing. Without a retarder curing would eventually occur before the mortar can be sufficiently smoothed. The hardened plaster would have to be finished mechanically. In other cases, where a necessary accelerator would be omitted, there would be delays in the subsequent work on the site. The land discharge and the construction progress can no longer be achieved at the expected pace.

In a preferred embodiment, the flow of the dosing agent is monitored. If not added, the main water flow is interrupted. As a result, the plastering work is inevitably interrupted.

In a particularly preferred embodiment, an additive flow meter in a metering circuit, ie another flow meter, measures an additive flow. The metering circuit may be part of a metering device designed above. It is very particularly preferred if the additive flow meter also measures the metered amount of the additive. The additive flow meter transmits its measurement data to the microcomputer system. In this way, detected deviations from one Setpoint in the form of a control loop are compensated by the control electronics. The double detection of the added additive as a flow on the one hand and as a quantity on the other hand advantageously allows a plausibility check or a fine measurement of the additive dosage.

The cleaning agent automatically regulates the water pressure. A pressure reducer is arranged on the input side of a mixed water line, in particular upstream of the interruption device. The pressure regulator regulates the water pressure in the cleaning dosing unit. For example, a pressure reducer is installed in such a way that the pressure reducer ensures a constant water pressure in the cleaning doser. Advantageously, the regulation of the water pressure allows a facilitated and more precise dosage of the additive.

A cleaning valve arranged on the input side of the metering circuit blocks an additive feed connection of the metering circuit during a cleaning process. At the same time, the cleaning valve opens a mixed water supply connection of the dosing circuit. By a cleaning process can advantageously be freed of dosing of deposits. The time-definable automatic execution of cleaning processes increases the reliability of the cleaning agent. After a minimum period of operation, a cleaning process can be interposed, preferably autonomously or automatically.

The calculation of the amount of liquid additive to be metered in units per liter of mixed water is based on a predeterminable characteristic field. The characteristics of the family of characteristics form the setting behavior, in particular the setting time, various processing products, such. As mortar and z. As plasters, under different conditions. Ambient parameters are ascertained as initial values for the conditions, in particular different temperatures, humidities, masonry substrates, etc. The characteristic curves are present in a particularly integrated design in the microcomputer system, for example in the form of regression data.

The drain connection is ideally designed so that it can be connected to a mixing chamber for the dry plaster with the mixed water. Conventional plastering machines usually have a mixing chamber, which stirs the dry plaster with water to make a plaster for processing. The metering device is in one embodiment part of a downstream mixing chamber with whirl. figure description

Further advantageous properties and embodiments of the invention will be described with reference to the drawings explained below. In these drawings shows

1 is a plan view of an embodiment of the metering device according to the invention, Fig. 2 is a front view of the control panel of the metering device of FIG. 1, Fig. 3 is a view into the depth of the metering device of FIG

Conduit section with a mixing screw as a homogenizing agent,

4 is a side view of the mixing screw,

 5 shows a schematic spatial representation of the structure of an embodiment of a cleaning dosing device according to the invention,

6 shows an illustration of the flow paths and components of the cleaning dosing device from FIG. 5, FIG. 7 shows a representation of a characteristic field as functional curves in a 3-dimensional coordinate system with the axes air humidity H, setting time t and additive requirement d,

8 is a schematic diagram of the functional components of the cleaning dosing device from FIG. 5.

Hereinafter, a first embodiment of the invention with reference to Figures 1 to 4 will be described in more detail.

Fig. 1 shows the metering device 1 from above, with a cover of the housing 4 is removed. The power supply of the electrical systems of the device via a power supply unit 36. The mixed water flows through the inflow port 8 in the metering device. 1 After passing through the inflow port 8, the mixed water flows through the flow meter 16. Instead of the flow meter 16 may also be a, in particular digital, pressure gauge be installed.

Downstream of the flow meter 16, a metering point for the liquid additive is arranged. At the Zudosierstelle the liquid additive is mixed by means of the dosing 20 in the mixed water.

The microcomputer system 24 receives flow data from the flowmeter 16. The microcomputer system 24 calculates the dosing amount of the liquid additive. The microcomputer system 24 controls the dosing component 20 according to the calculation of the ratio of liquid additive to mixed water. The mixing of the mixture of mixed water and liquid additive is homogenized prior to leaving the metering device 1 through the discharge port 12 by means of a homogenizing agent 28 (Figures 1, 2 and 3 in conjunction; the discharge port 12, see in particular Fig. 2, lies in the plan view of Fig. 1 below the control panel 52 and is thus obscured in Fig. 1).

The homogenizing agent 28 is here a mixing screw with sections in opposite directions (FIG. 4).

The type of dry mortar can be stored in the microcomputer system 24 by means of the RFID reading device 32.

The device 1 shown in FIGS. 1 to 4 can be operated according to the following method and with the following parameters:

 The method is used to produce two-component dry mortar products, such as. As concrete, plaster, screed.

By mixing by means of automatically metering mixing devices, such as a cleaning machine, the liquid additional component, such as a retarder or an accelerator is pre-inserted by means of a Proportionaldosiergerätes in the mixed water in the normal treatment with water. The introduction can also be done directly in the actual mixing container of the plastering machine, d. H. into the dry mortar and water mixture.

By this type of dosing of liquid components, the processing property, such as the curing time, of the mixed dry mortar product can be regulated or determined.

As a liquid component, d. H. as a liquid additive, apply accelerator or retarder of any kind. The liquid additive may also be referred to as a binder.

The microcomputer system 24 can be designed as a control-related "heart." The function of the microcomputer system 24 is as follows:

There is a microcontroller-controlled board with motor and valve control for mixing chemicals with water or other low-viscosity liquids, according to the mixing method of admixture calculation in units per liter available. The Microcomputer system 24 may be arranged on a μΡ board, which in particular contains the acquisition and control software stored.

The microcomputer system 24 performs the recording of environmental variables such as water pressure, water flow, water temperature, air temperature, humidity, level, date and time, and location (GPS).

The setting (by the user) for distinguishing different types of dry mortars, each with different mixing specifications, is determined by means of the RFID reading device 32, i. H. by RFID tag. The data of the RFID is introduced into the microcomputer system 24.

An intervention by the operator and the operation is realized by means of (push-button type) button 44, 48. To display important information to the user, a display 40 is used.

There is a calculation of the respective mixing ratio by the software in the microcontroller. Logging of the variables takes place in the internal memory of the microcomputer system 24.

 The valve and pump functions are controlled by appropriate drivers on the board. The complete mixture of the products, such as mixed water and liquid additive, happens during the flow through a special mixing section to ensure the most homogeneous possible mixing. The homogenizing mixing screw 28 is arranged axially in a drain pipe section 64 (FIG. 3). The mixing screw 28 is coaxial in the drain pipe section 64. The drain pipe section 64 in combination with the mixing screw 28, the mixing section.

The mixing screw 28 has at least two screw sections 68 with alternating directions in opposite directions (FIG. 4). By alternately opposite directions of the screw sections 68, a particularly effective turbulence of the binder mixed water mixture and thus a homogeneous mixing is achieved.

Another advantage is that the basis for dosing to set up new products or

can be achieved cost-effectively with product changes by means of fewer laboratory tests. The metering device 1 represents a programmable and user-friendly multi-component metering system.

The metering device has a great ease of operation and ease of use.

During processing in the dosing device 1, it is ensured by complex and highly accurate measurements of the flow rates and of a sophisticated mixing system with the homogenizing agent 28 that customer-specific specifications of the mixing ratio and the current flow rates coincide with the respective water pressure. The monitoring uses internal sensors to monitor additional components or level. Flow and pressure fluctuations are taken into account.

This also ensures that customer-specific processing requirements are met by automatically adjusting the mixing ratio, taking into account the current environmental parameters.

The water pressure is determined by a pressure regulator. The flow rate results from adjustments to the actual plastering machine.

As a result, an excellent result in terms of uniformity of the mixture, and subsequently an absolutely constant and one of the user accurately timed surface area can be achieved.

A much faster and more accurate processing by the user is possible by the metering device 1 according to the invention.

The dosage is carried out by means of successive approximation and the mixing method outlined above for the most accurate fine rod mixture up to a ratio of 1: 1000.

The dosing rate is typically in the range of about 100 μΙ to 3 ml. Higher dosages are possible.

The water flow rate can be 400 to 3000 liters per hour. The device is designed for a common water pressure range. Thus, the water pressure in the illustrated embodiment may be at least 3 bar to a maximum of 8 bar. The housing 4 is advantageously a splash-proof steel structure. The housing 4 is hot-dip galvanized. The housing 4 is painted. The housing 4 is thus Baustellenfest. As a transport aid carrying handles and a construction site suitable tires on the housing 4 may be present. In one embodiment, the housing 4 can be designed to be movable with transport rollers 56 (FIG. 2).

The dimensions of the device may vary depending on the embodiment. The tank size of the liquid additive reservoir 60 may be in the range of about 15 to 25 liters. In the chosen illustration, the tank is 20 liters. An agitator is provided in the tank.

For the water connections 8, 12 ³ /4-inch quick-release fasteners can be used well. One connection is provided for the mixed water. Furthermore, an additional pure water connection, z. B. for sludge, available.

With the help of an internal heating, z. As for the winter months, the dosing unit can be used even in the colder months.

Product conversion, d. h., If another plaster is to be processed, by means of non-contact card reader. The display 40 serves (additionally) for settings and system information. Thus, the metering device can be adjusted via the card reader and / or via the display.

For a particularly simple operation, the operation via the main switch 100 and only a few buttons 44, 48, such. B. the plus button 44 or minus button 48. The operation can be done so menu-guided. The operation takes place via the control console 52. The control console 52 is mechanically stable for gross motor inputs.

As a filter system at least a coarse filtration in the tank storage tank is present. There is typically a water supply filter 72. Particularly advantageous is the water supply filter can be integrated as part of the pressure reducer 76 in this. Fine filters 73 are arranged in front of the metering pump.

The housing 4 is, as seen in Fig. 2, designed flat and smooth, in beveled the control panel 52 with the buttons or push buttons 44, 48, with the display 40 and is aligned with the main switch 100 upwards. In the housing 4, the drain port 12 is embedded. The housing 4 protectively includes the pressure flow meter 16 adjacent to the reservoir 60.

The drain port 12 is prepared for transfer to a Putzanmischkammer. The drain port 12 may, for. B. in a container in which a Trockenputzmischung is mixed with sufficient water. The metering device 1 is designed so that it can be installed as a component in a plastering machine as well as a stand-alone unit in a water supply for a plastering machine.

5 shows a schematic side view of an embodiment of a cleaning dosing device 96 according to the invention. The housing 4 of the cleaning dosing device 96 is only partially shown. Two side parts of the housing 4 are omitted in Fig. 5 to release the view into the interior of the cleaning dosing device 96. The cleaning dosing device 96 comprises a mixed water section 69. The mixed water is introduced into the cleaning dosing device 96 via the inflow connection 8.

A water supply filter 72 filters the mixed water entering the mixed water section 69. Downstream of the water supply filter 72, a pressure reducer 76 in the mixed water section 69 is arranged. Downstream of the pressure reducer 76 is a breaker 80 in the formation of a check valve in the mixed water section 69th

The check valve 80 interrupts the mixed water stream 1 12 in the mixed water section 69 automatically under certain predetermined conditions. An automatic interruption of the mixed water stream 1 12, for example, in case of failure of a component of Putzdosierers 96, in particular in the event of failure of a metering 20, take place. Even with a shortage of the liquid additive in the cleaning dosing 96, the mixed water stream 1 12 is interrupted.

Downstream of the check valve 80, a flow meter 16 is arranged in the mixed water section 69.

In the mixed water section 69 opens at a Zudosierstelle the dosing 92 a. By an additive supply port 104 of the additive is fed into the dosing 92. A fine filter 73 (not shown in Fig. 5, see Fig. 6) cleans the flow of the additive after flowing through the additive supply port 104. Downstream of the Zusatzstoffzufuhranschlusses 104 is a dosing 20 arranged in the dosing 92. Downstream of the dosing component 20 is an additive flow meter 88 in the dosing circuit 92. Downstream of the additive flow meter 88, the dosing circuit 92 opens into the mixed water section 69.

The additive flow meter 88 measures an additive flow. In addition, the additive flow meter 88 also measures the metered amount of the additive. These measurement data are passed on to a microcomputer system 24 by the additive flow meter 88. Detected deviations from a desired value are compensated in the form of a control loop by the control electronics.

A cleaning path 85 is branched off from the mixed water section 69 between the pressure reducer 76 and the check valve 80. In the cleaning path 85 is a cleaning valve 84. The cleaning valve 84 is arranged on the input side of the dosing 92. If the cleaning valve 84 is opened, the dosing circuit 92 is cleaned, mixing water from the cleaning path 85 flowing into the dosing circuit 92 via a mixed water supply connection 108. In an alternative illustration, the cleaning valve 84 can also be arranged at the junction parts of the mixed water feed connection 108 into the dosing circuit 92. During a cleaning process, the cleaning valve 84 blocks the additive supply port 104 of the dosing 92 from.

Downstream of the metering point of the additive into the mixed water section 69, a mixing coil is arranged coaxially as a homogenizing agent 28 in a drain pipe section 64. The homogenizing agent mixing spiral 28 swirls the mixed water additive mixture and thus brings about a homogeneous mixing of the mixed water with the additive.

The homogenized mixed water additive mixture flows out of the cleaning dosing device 96 through the drain connection 12. The discharge connection 12 at the end of the discharge pipe section 64 offers homogenized dosages in the mixed water stream by means of homogenizing means 28.

At the front of the cleaning dosing device 96 is a control panel 52 with a main switch 100 for switching on and off of the cleaning dosing 96. By means of plus push button 44 and minus button 48, the delay can be set. The set delay is displayed on the display 40.

The microcomputer system 24 cooperates with the components of the cleaning dosing device 96.

6 shows an illustration of the flow paths and components of the cleaning dosing device 96 from FIG. 5, wherein the data and control lines between the microcomputer system 24 and the components of the cleaning dosing device 96 are indicated by arrowed lines. A control line connects the microcomputer system 24 to the check valve 80. A data line transmits mixed water flow measurement data from the flow meter 16 to the microcomputer system 24. The microcomputer system 24 controls the purge valve 84 via a control line. The microcomputer system 24 receives access to the dosing component 20 via a control line The water passes via the feed port 8 through the mixed water section 69 via the water supply filter 72 to the pressure reducer 76. The pressure reducer 76 is the first homogenizer for the mortar mixture. The second homogenizer 28 enhances the mixture before exiting the drain port 12.

The calculation of the amount d of the liquid additive to be metered in units per liter of mixed water is preferably based on a family of characteristics. Such a characteristic field, more precisely a representation of a characteristic field as function curves in a 3-dimensional coordinate system with the axes of air humidity H, setting time t and additive required or dosing amount d, is shown in Fig. 7. The temperature T, represented as T1 and T2, enters the characteristic curves as a parameter. The characteristic curve field depicts the setting behavior of various products, such as mortar, plaster, etc., at different temperatures, humidities, masonry surfaces, etc.

In FIG. 7, by way of example, three amounts of additives d ₁ , d ₂ and d ₃ to be dosed in their functional dependency f (t, H, T) given by the characteristic field are given the values of a setting time ti, two different humidities H _; H ₂ and two different temperatures T _1; T ₂ each drawn out.

The characteristic curves of the characteristic field can be present in the microcomputer system 24 (compare FIGS. 5 and 6), for example in the form of regression data. The regression data are from from the evaluation of regression equations, which may have been formulated for example by means of experimental data from laboratory experiments. The characteristic curves of a characteristic field which can be specified by the user or automatically selected are taken into account in the calculation of the metered quantity of the liquid additive.

FIG. 8 shows a schematic representation which permits a quick overview of the interaction of the functional components of the cleaning dosing device 96 from FIG. 5.

The mixed water stream 1 12 is metered by means of the dosing 20 a predeterminable amount of additive from the reservoir 60 of Putzdosierers 96 (of FIG. 5).

The function "Read new curves" 1 13 in the characteristic memory 1 14 can be carried out via the control panel The functions "input of the used plaster" 1 15 and "input of the desired delay" 1 16 can also be performed via the control panel (see control panel 52 in fig 5).

The function "detecting the amount of water" 1 17, for example based on a flow measurement of the mixed water stream 1 12 by means of the flow meter 16, is fed into the microcomputer system 24. Also the functions "detection of the humidity" 1 18 carried out by corresponding feelers forming sensors "Detecting the temperature" 1 19 and "detecting the metering quantity control" 120 are fed into the microcomputer system 24.

The microcomputer system 24 may output system conditions such as the set or present delay in the display 40. The mixed water stream 1 12 leaves mixed with the desired, predetermined amount of additive the cleaning agent in the direction of cleaning machine.

The cleaning dosing device according to the invention is preferably integrated into a cleaning machine which combines the functions of a plastering machine and the cleaning dosing agent.

In summary, it can thus be stated that the invention is preferably integrated into a plastering machine, wherein the liquid additive is metered into the mixed water before the water is mixed with the mortar. In a modified embodiment, the liquid additive can be metered directly into the mortar mixing container, irrespective of the water, by means of a cleaning dosing device preferably integrated in a plastering machine.

An objective of the method, in particular of the calculation, is primarily to influence in a desired manner an output-side event. One should be able to set the processing properties of the processing mortar variable adjustable in time. The mere, independent of the water flow rate setting or maintaining a certain dosage, such. B. constant 0.2% addition, in terms of this priority objective in the background.

In a preferred embodiment, the selected curing time without intervention of the user even under changing environmental conditions, such as. As water flow rate, temperature, humidity, etc., maintained. In a particularly preferred embodiment, the user can change the desired curing behavior at any time in the course of the work, in particular in a user-friendly manner.

In short, a primary goal is achieved by preserving a beautifully plastered wall, both in the terminology of a skilled person and in the appreciation of an end customer. This can be achieved by means of the method presented and by the devices, in particular by the automated modification of the processing properties of the mortar.

In one embodiment, the liquid additive is metered into a mixed water. This metering can be carried out by a device according to the invention integrated in a plastering machine or alternatively in a separate, d. H. take place in a device not integrated in the plastering machine.

The water pressure directly affects the amount of water, but the addition is calculated primarily relative to the amount of water. An addition relative to the water pressure is secondary.

In a preferred application of a method according to the invention or in a device according to the invention, the amount of water is measured. Alternatively, although less preferred, one could also measure the pressure and conclude the amount of water via the cross-sectional ratios. The two partial measuring methods could also be carried out suitably combined, in particular in the sense of a Plausibility check or quality assurance. An important parameter in any case is the amount of water.

Maintaining the mixing ratio is just one of several outcomes. Above all, by means of the methods and devices according to the invention, it is possible to ensure the automatic adaptation of the mixing ratio to various environmental specifications, to changing environmental conditions, in particular on construction sites etc., while maintaining the setting behavior.

As a result, the dosage with respect to the amount of water and the type of mortar is automated by means of the inventive methods and devices. It is maintained with the help of the microcomputer system.

The predetermined mixing ratio is undoubtedly of great influence on the quality of the processing mortar, but the invention contributes to the improvement of plasters or cleaning materials also by the desired predetermined setting behavior. The setting behavior is, as stated, by the amount of water, the type of mortar, but also by the environmental conditions such. As temperature, humidity, subsurface, etc. determined. Nevertheless, the calculations or the characteristic curves in the microcomputer system also make it possible to reduce the function of the invention to maintaining a predefinable mixing ratio independently of other parameters.

To achieve a uniform surface image, it is advantageous that not only is metered, but that is also homogenized.

The need for human-machine interaction that is as user-friendly as possible on site requires that the characteristic values of the dry mortar used, but possibly also other system-relevant data, be read into the devices according to the invention in the simplest manner and in a fault-tolerant manner, even under difficult environmental conditions, in particular on a large construction site to be able to. RFID readers are a solution to this. However, there are a variety of other solutions, such as. As USB stick method, bar code reader, Bluetooth connections, etc., also conceivable and possible.

In advantageous embodiments of a device according to the invention, a type of data input into the device by the user, for example in the form of data transmission by means of a mobile memory module, such as a USB stick take place. Also solutions by means of other pluggable data carriers or contactless electronic transmission techniques, such as Bluetooth, can be used in addition to a key input. In any case, it will be ensured that the user is enabled in a construction site-compatible manner to respond to special circumstances or wishes or, for B. read new properties of plaster products used or to integrate properties of new, not yet used plasters in the device.

A particular advantage of the invention is to be seen in this context that data input, apart from the possibilities of key entry in everyday use, does not necessarily have to be done by a service technician a service technician, but that the users this, especially on site at the construction site, easy to do. For example, the application of a plaster, which is not yet present in the characteristic memory of the metering, in a simple and thus very user-friendly manner by the offered Einleseschnittstellen such as button or RFI D reader considered.

LIST OF REFERENCE NUMBERS

Dosing device 84 Cleaning valve

 Housing 85 cleaning path

 Inflow port 88 additive flowmeter

 Drain connection 92 dosing circuit

 Flow meter 96 cleaning dosing

 Dosing component 100 Main switch, on / off button

Microcomputer system 104 Additive supply port

 Homogenizer 108 Mixed water supply connection

 RFID reader 1 12 Mixed water flow

 Power supply unit, power supply 1 13 Reading in new characteristics

 Display, z. B. for the delay 1 14 characteristic memory

in %

 Pushbutton "Delay Plus" 1 15 Input used plaster

 Pushbutton "Delay Minus" 1 16 Enter desired delay

Control panel 1 17 Collection of water

 Transport rollers 1 18 Humidity detection

 Storage container for the binder 1 19 detection temperature

 Drain pipe section 120 Detection of metering quantity control

Slug section H Humidity

 Mixed water range t curing time

 Water supply filter to be metered amount of liquid d additive in units per liter of mixed water

 Fine filter T temperature

 pressure reducer

 Breaking device

especially in the form of a

shut-off valve

Claims

 claims Process for the preparation of a processing mortar which comprises a multicomponent dry mortar, preferably a two-component dry mortar, for example based on gypsum or cement, such as concrete, plaster, screed,  by means of at least one automatically metering mixing device, such as a  Cleaning machine, with at least one mixing container in one for cleaning work  convertible state with the addition of a mixed water,  characterized,  in that at least one liquid additive, such as a retarder or an accelerator, for example a tartaric acid solution, by means of at least one automatic additive for treating the mixed water for admixing with the mixed water prior to admixing it with the multi-component dry mortar  Metering device (1) is introduced. Process for the preparation of a processing mortar which comprises a multicomponent dry mortar, preferably a two-component dry mortar, for example based on gypsum or cement, such as concrete, plaster, screed,  by means of at least one automatically metering mixing device, such as a  Cleaning machine, with at least one mixing container in one for cleaning work  convertible state with the addition of a mixed water,  characterized,  in that at least one liquid additive, such as a retarder or an accelerator, is introduced into the mixing vessel of the mixing device independently of a supply line of the mixed water by means of at least one automatic metering device (1). 3. The method according to any one of claims 1 or 2 or according to the claim combination 1 and 2,  characterized in that  the amount to be dosed (d) of the liquid additive in units per liter  Mixed water is determined by means of a calculation and is introduced in a calculated amount in the mixing vessel. 4. The method according to one or more of the preceding claims,  characterized in that the processing properties, such as the curing time, the processing mortar, the In particular, by mixing the multi-component dry mortar is formed by the addition of the liquid additive by means of the automatic Metering device (1) are variable in time, especially in the course of a processing operation adapted to a processing speed is varied. Method according to one or more of the preceding claims, characterized in that through the adjustability of the processing properties, such as the curing time, of the mixed multicomponent dry mortar, a time-definable, such as a constant; Surface image of, preferably applied to a wall, Processing mortar can be produced .. Dosing device (1) for metering and admixing at least one liquid additive, such as a retarder or an accelerator, to a mixed water for producing a processing mortar containing a multi-component dry mortar, preferably a two-component dry mortar, for example gypsum or cement-based Concrete, plaster, screed, comprises, with a, preferably encapsulated, movable, height-adjustable housing (4), and with an inlet (8) and an outlet connection (12) and with a flow meter (16) for the mixed water and with a metering component (20) for the at least one liquid additive characterized in that a predetermined mixing ratio between liquid additive and dry mortar regardless of the respective at an inflow port 8 of the mixed water prevailing water pressure within a mixing parameter band is maintained. Dosing device (1) according to claim 6, characterized in that the maintenance of the predetermined mixing ratio automated means Detection of the flow rate measured by the flowmeter (16) by a microcomputer system (24) and the flow rate and the type of Multi-component dry mortar coordinated metering of the liquid additive by the microcomputer system (24) controllable dosing (20). 8. dosing device (1) according to claim 6 or 7,  characterized in that  the mixing of the mixed water and the at least one liquid additive downstream of a Zudosierstelle by means of a homogenizing agent (28), such as a mixing screw, is homogenizable. 9. dosing device (1) according to at least one of claims 6 to 8,  characterized in that  the type of multi-component dry mortar by means of an RFID reader (32) in the microcomputer system (24) can be stored. 10. Use of a metering device (1) according to one of the preceding claims 6 to 9 for applying a mineral covering to a building,  characterized in that  depending on a processing progress with the aid of a continuously dosed additive, such as a tartaric acid solution, a curing behavior of the cover, in particular with respect to a curing rate, is varied. 1 1. Plastering machine for producing a processing mortar which converts a multicomponent dry mortar, preferably a two-component dry mortar, for example gypsum or cement-based, such as concrete, plaster, screed, with at least one mixing container in a state processable for plaster work with the admixture of a mixed water,  characterized in that  a, preferably integrally with the plastering machine integrally installed, metering device for metering a liquid additive, in particular according to at least one of claims 6 to 10, is present, which is a treatment of the mixed water by means of the liquid additive, in particular by a method according to at least one of claims 1 to 5, automated. 12. Putzdosierer (96), in particular with a metering device (1) according to at least one of claims 6 to 9,  characterized in that  an interruption device (80), such as a check valve, under certain predeterminable conditions, such as in the event of failure of a component of the cleaning doser (96), in particular a metering component (20), or in the event of shortage of a liquid Additive in the cleaning dosing (96), automatically a mixed water flow (1 12) interrupts. 13. cleaning doser (96) according to claim 12,  characterized in that  an additive flow meter (88) in a metering circuit (92), in particular the metering device (1), measures an additive flow, in particular additionally measures the metered amount (d) of the additive, and passes it on to a microcomputer system (24) in particular detected deviations from a desired value in the form of a control loop can be compensated by the control electronics. 14. Putzdosierer (96) according to at least one of claims 12 or 13,  characterized in that  a pressure reducer (76) on the input side of a mixing water section (69), in particular upstream of the interruption device (80), is arranged, which regulates the water pressure in Putzdosierer (96), in particular for a constant water pressure in  Cleaning doser (96) provides. 15. Putzdosierer (96) according to at least one of claims 12 to 14,  characterized in that  a cleaning valve (84) arranged on the input side of the dosing circuit (92) shuts off an additive supply connection (104) of the dosing circuit (92) during a cleaning process and at the same time forms a mixed water supply connection (108)  Dosing circuit (92) opens. 16. Putzdosierer (96) according to at least one of claims 12 to 15,  characterized in that  the calculation of the amount to be dosed (d) of the liquid additive in units per liter of mixed water based on a predeterminable characteristic field whose characteristics in particular the setting behavior, in particular the setting time (t), various processing products, such as mortar, plasters, under different conditions, such as various Mapping temperatures (T), humidities (H), masonry surfaces, wherein the characteristics are present in particular in the microcomputer system (24), for example in the form of regression data.