Device and method for processing injection molding compounds

Abstract

The invention relates to a device (30) for moistening and processing dry sprayable compounds. The device (30) comprises a filling hopper (1) and / or a pre-container (22, 23) for dry sprayable compounds, a metering system (2) which is supplied by the filling hopper (1) and / or the pre-container (22, 23), a first pressure hose (38) which is connected to the metering system (2) via a connecting element (5), and a conveying gas generator (40) which pressurizes the first pressure hose (38) with conveying gas in order to pneumatically convey the dry sprayable compounds in the pressure hose (38) over a required distance.Furthermore, the device (30) includes a liquid reservoir (50) connected to a media hose (52), a mixer (8) coupled to the pressure hose (38) and the media hose (52) via inlets, the mixer (8) moistening the dry spray compound with liquid, such as water and / or a liquid binder, from the media hose (52), and a spray nozzle (9) connected to an outlet of the mixer (8). The invention also relates to a method using such a device (30).

Description

Technical field

[0001] The invention relates to a device for moistening and processing dry sprayable materials comprising, a) a filling funnel and / or a pre-container for dry spray compounds, b) a dosing system which is fed via the filling hopper and / or the pre-container, c) a first pressure hose which is connected to the dosing system via a connecting element (5), d) a conveying gas generator which pressurizes the pressure hose with conveying gas in order to pneumatically convey the dry spraying materials in the pressure hose over a required distance, e) a liquid reservoir connected to a media hose, f) a mixer which is coupled to the pressure hose and the media hose via an inlet of the mixer, wherein the mixer moistens the dry spray compound with liquid, such as water and / or a liquid binder, from the media hose, g) a spray nozzle which is connected to an outlet of the mixer.

[0002] Furthermore, the invention relates to a method using such a device for moistening and processing dry sprayable materials, comprising the following process steps: a) Mixing a carrier mass or bulk material and micro hollow glass spheres and / or fibers to form a dry sprayable compound, b) Feeding the dosing system from a filling hopper and / or a pre-container for dry spray compounds, c) Introducing the dry injection compound into the pressure hose via a connecting element, d) Pneumatic conveying of the dry injection material through the pressure hose, wherein the pressure hose is pressurized with the conveying gas from the conveying gas generator, e) Pneumatic acceleration of the conveying of the dry spray compound in an acceleration nozzle, which is supplied with pressurized acceleration gas from the conveying gas generator of a second pressure hose, f) Moistening the dry spray compound in a moistening nozzle, which is supplied via a media hose from a liquid reservoir, g) Exit of the moistened spray mixture from the spray nozzle. Description

[0003] Insulating buildings is becoming increasingly important in times of climate change. Insulating materials, polystyrene boards, and similar products are used for this purpose. All insulating materials are based on the principle that air and many gases are poor conductors of heat. Therefore, plastic is foamed and hardened to form polystyrene. The air trapped within the material is crucial in this process. More recently, small glass spheres, also known as microhollow glass spheres, have been used as a building material. They are mixed with cement, and this mixture is sprayed onto surfaces using specialized machinery to achieve its insulating properties.

[0004] Wet spraying is a process in which the building material is mixed with water or another binding agent directly in the machine. This mixture is then conveyed directly through hoses or pipes to the spray nozzle and applied to the target surface. This method ensures fast and efficient application, as the building material is already mixed and requires no further processing. It is well-suited for applications requiring high adhesion and immediate stability, such as slope stabilization or tunnel construction.

[0005] Dry spraying is a process in which a building material is conveyed using compressed air or another conveying gas and only enriched with a liquid, usually water or another liquid binder, at the end of the conveying path. During dry spraying, the building material remains dry throughout its entire transport through the machine and the conveying line, enabling precise dosing and uniform application. The liquid is added immediately before application to the target surface, allowing for a high degree of adaptability with regard to the desired consistency and final strength of the material. Special nozzles, such as the GUNMIX, are used to achieve this. ® The nozzle ensures a homogeneous mixture of the dry building material with the liquid.

[0006] Known dry spraying systems are specifically designed to efficiently and gently transport and process building materials. These systems typically consist of several main components that work together to ensure precise handling of the dry material.

[0007] First, there is a pre-container where the dry building material is stored. From there, the material is conveyed, for example via a hopper, to a dosing system, which allows the exact quantity of building material conveyed through the system to be determined. A metering ball valve, for example, can be used as the dosing system. Dosing is also often achieved using special mechanisms such as screw conveyors or pneumatic systems that transport the material through the system.

[0008] A key aspect of dry spray systems is pneumatic conveying, which uses compressed air to transport the building material through pipelines. This system is designed to keep the material dry until it reaches the dispensing point. Just before application to the target surface, a precisely measured amount of liquid binder is added. This addition typically occurs at a special spray nozzle, which ensures that the dry material is effectively mixed with the binder to guarantee uniform application and optimal adhesion.

[0009] The overall design of such systems is geared towards high reliability and ease of maintenance. Many systems feature automated controls that allow for precise regulation of various parameters such as material flow and binder addition. This helps to ensure consistent quality of the applied material and increases the efficiency of the processing.

[0010] This process, i.e., dry spraying and wet spraying, is also used to apply materials to buildings for insulation. State of the art

[0011] Document DE10211331B4 describes a process for producing an aerogel-based insulating layer on the exterior walls of buildings. The process involves conveying dry aerogel particles via a transport hose to a mixer, which is connected to a spray nozzle, using compressed air. In the mixer, the aerogel particles are mixed with a binder. The mixture is then fed to the spray nozzle and applied to the exterior wall under pressure. The aerogel particles used can have hydrophobic properties and are available in various sizes, which increases the versatility and adaptability of the process to different requirements.

[0012] German patent DE29824292U1 describes a process for producing shotcrete containing a mineral, hydraulic binder such as Portland cement or similar materials. This binder is partially coated with a water-repellent agent and an alkali-free accelerator, resulting in faster reaction and curing times. The concrete can also contain conventional additives and uses moist aggregates, reducing the need for complex aggregate drying and thus making it more efficient and cost-effective. Shotcrete is particularly suitable for construction projects requiring rapid hardening, such as tunnel construction.

[0013] EP0780528B1 describes a spraying system for applying viscous coatings such as plaster or stucco. The system enables the efficient processing of materials such as hygroscopic binders and fillers. These materials are stored in a hopper and applied via a nozzle that moistens the dry material. A key feature of the system is the use of air pressure and vacuum to move the material through the device and ensure uniform moistening. This technique effectively mixes and applies the materials, resulting in a consistent and high-quality coating. The system is particularly suitable for use in the construction and aerospace industries, where robust and aesthetically pleasing surfaces are required.

[0014] German patent DE19900655C1 describes a device for generating continuous and arbitrarily high-flow bulk material streams, which is used in particular for the metered filling of equipment and the metered introduction into conveying lines. This device is designed for handling both non-cohesive and cohesive bulk materials and includes a metering unit located directly below a standard dosing vessel. The device features a hopper with a shallow wall slope for coarse, non-cohesive bulk materials, which transitions into a mass flow cone with a steeper wall slope. This cone is connected to a metering and flushing valve that has a variable throttle with different outlet diameters, allowing the bulk material conveying rate to be precisely adjusted.The device enables efficient handling and flow rate control through the use of differential pressure measurements and controls, which consist of a combination of pressure measuring points, delivery lines and an integrated dosing and flushing valve.

[0015] US Patent 2004092614A1 describes a composition and method for producing a foam-like refractory coating, primarily intended for use on steel structures. The composition consists of a cementitious mixture that is foamed by the addition of air and mechanical turbulence to create a stable foam. This foam is then applied through a nozzle and, upon curing, forms an insulating and refractory layer on the substrate. A key aspect of the invention is the use of polyvinyl alcohol as a foam stabilizer and the introduction of a curing accelerator immediately prior to application to improve the adhesion and strength of the foam to the substrate. The formulation may also include fibrous components and other additives to optimize the physical properties of the coating.

[0016] WO2018108678A1 describes a mixing nozzle for a shotcrete application device specifically designed for applying refractory concrete using a dry-mix shotcrete process. The mixing nozzle includes an aerosol generation unit that produces an aerosol from a liquid or dry, free-flowing injection material together with conveying air. An integrated aerosol injection device then enables the central injection of the aerosol into the stream of dry mix material. This technology is particularly suitable for applying refractory concrete and aims to quickly and efficiently adjust the physical properties of the applied shotcrete.

[0017] EP3997048B1 describes a dry plaster mix for sprayable insulation. This mix consists primarily of microglass hollow spheres and calcium sulfoaluminate cement, supplemented by additives such as aerogel. The composition enables efficient thermal insulation while offering high strength and frost resistance. The mix is ​​specifically designed for spray application, ensuring homogeneous distribution and ease of use. This improves the energy efficiency of buildings through optimized thermal insulation properties and is particularly advantageous for uneven substrates where traditional insulation boards are difficult to apply.

[0018] EP4196451B1 describes a thermal insulation plaster system and a method for its production. This system comprises several plaster layers applied one on top of the other, each fulfilling different functions within the system due to its composition. A particularly characteristic feature of this system is the use of mineral binders and additives such as micro-hollow glass spheres or aerogel, which improve the plaster's thermal properties. The various layers can have different compositions to meet specific requirements for thermal insulation, mechanical stability, or other functional properties. The layers are applied using a specialized spraying process that ensures efficient and uniform distribution of the material.

[0019] A problem with known devices and methods for applying plaster layers with microhollow glass spheres is that the microhollow glass spheres are quickly destroyed during processing. This would negate the thermal insulation effect of the insulating material. While the use of aerogel particles in the insulating material prevents these particles from being destroyed during processing, they have the significant disadvantage of being very difficult to separate from cement during recycling. Disclosure of the invention

[0020] The object of the invention is therefore to create a system and a process which efficiently and gently processes the insulating material with micro hollow glass spheres in order to preserve the physical properties when spraying the micro hollow glass spheres and to ensure effective insulation after the insulating material has been sprayed onto a surface.

[0021] According to the invention, the problem is solved by the fact that, in a device for moistening and processing dry spray compounds of the type mentioned at the outset, h) Means are provided for the use of dry sprayable compounds containing micro hollow glass spheres and / or fibers.

[0022] The invention is based on the principle of transporting the microhollow glass spheres through the pressure hoses as gently as possible. Therefore, the pressure and velocity of the pressure hose are set to such a degree that the microhollow glass spheres are not damaged during transport of the injection compound. The metering system plays a crucial role here, as it is essential that neither too much nor too little of the dry injection compound enters the pressure hose. The metering system allows for precise adjustment of the required amount of dry injection compound. Both the amount of liquid used for moistening and the liquid pressure can be adjusted. Likewise, the quantity and pressure of the conveying gas are regulated and set.

[0023] The advantage of this device lies in its ability to efficiently handle and moisten dry injection molding compounds, especially those containing microhollow glass spheres and / or fibers. These materials can be sensitive to moisture, and precise humidification control ensures optimal processing of these specialized materials without damaging their structure.

[0024] An advantageous embodiment of the device according to the invention for moistening and processing dry sprayable compounds is achieved by providing at least one pressure regulator and / or a control valve for regulating the flow rate of the conveying gas. The integration of a pressure regulator or control valve for regulating the flow rate of the conveying gas enables precise control of the gas flow, which ensures more uniform and controllable moistening of the sprayable compounds. This improves the quality of the final product and increases the efficiency of the process. Compressed air is typically used as the conveying gas. Compressed air is particularly easy to handle and is generated in a compressed air generator.

[0025] A further advantageous embodiment of the device according to the invention is achieved by providing at least one accelerator nozzle in the pressure hose, which is supplied with accelerating gas from a second pressure hose. The inclusion of an accelerator nozzle operated with accelerating gas increases the efficiency of the pneumatic conveying. The accelerating gas increases the velocity of the bulk material in the hose, thereby reducing the throughput time and increasing productivity.

[0026] A particularly preferred embodiment of the device according to the invention is achieved in which the mixer is designed as a humidification nozzle. By designing the mixer as a humidification nozzle, a more homogeneous mixing of the liquid with the dry masses is achieved. This leads to a more uniform moisture distribution and improves the consistency of the final products.

[0027] A further advantageous embodiment of the device according to the invention for moistening and processing dry injection molding compounds is achieved by providing a pressure regulator and / or an adjustable flow valve, wherein the adjustable flow valve regulates the amount of liquid supplied to the dry injection molding compounds. The presence of an adjustable pressure regulator or flow valve for controlling the liquid supply enables precise adjustment of the amount of moisture supplied to the dry compounds. This precision is crucial for controlling and optimizing the quality and properties of the finished compound.

[0028] A further embodiment of the device according to the invention is achieved by designing the pre-container as a pressure vessel which has a conical nozzle at the outlet, wherein the quantities of dry injection materials discharged to the conical nozzle can be adjusted. A pressure vessel with a conical nozzle as the outlet offers the advantage that the discharge quantities of the dry injection materials can be precisely controlled. This is particularly useful for the accurate dosing and conveying of materials to further processing steps.

[0029] A further advantageous embodiment of the device according to the invention for moistening and processing dry spray compounds is achieved by designing the metering system as a flow-through airlock for volumetric metering. The metering system as a flow-through airlock for volumetric metering improves the accuracy of the material feed, resulting in a consistent quality of the mixed material and minimizing waste.

[0030] In a preferred aspect of the device according to the invention, at least two pre-containers are provided, wherein a first pre-container contains a dry carrier mass or bulk material and a second pre-container contains the micro hollow glass spheres, wherein the mixing ratio of the dry injection molding compound is formed by metering the dry carrier mass or bulk material with the micro hollow glass spheres in each container using a metering device. The use of two separate pre-containers for dry carrier mass or bulk material and micro hollow glass spheres allows for flexible adjustment of the mixing ratio. Naturally, each pre-container can be filled with its own mixture, so that, for example, each pre-container already contains micro hollow glass spheres mixed with a dry carrier mass. However, these can also be used with different mixing ratios.This separation allows for individual and precise dosing of the components, which further improves the quality of the final product.

[0031] The inventive method enables a versatile combination of materials by mixing a carrier mass with micro hollow glass spheres and / or fibers to produce a dry sprayable compound optimized for specific applications, which can be used as insulation material. Efficient material feeding by feeding the dosing system directly from a hopper or pre-container ensures a continuous and trouble-free supply. Precise control of the material movement is achieved by pneumatic conveying with a pressure hose pressurized by a conveying gas generator. The efficiency of the material transport is increased by pneumatic acceleration in an acceleration nozzle, which increases the throughput rates. Moistening the dry sprayable compound in a special moistening nozzle ensures a homogeneous moisture distribution, which improves the quality of the final product.Finally, the exit of the moistened spray compound from a spray nozzle enables precise and uniform application of the material to the desired surfaces.

[0032] In an advantageous embodiment of the method according to the invention, the filling hopper is metered with microhollow glass spheres from a first pre-container and metered with the carrier mass or bulk material from a second pre-container. This method offers the advantage of controlled metering, since the filling hopper is fed separately with microhollow glass spheres from a first pre-container and with carrier mass from a second pre-container. This enables precise control of the mixing ratios from 0 to 100% and improves the homogeneity of the final mixture, which is crucial for the consistency and quality of the final product.

[0033] A further embodiment of the method according to the invention is achieved by using a flow-through valve as the dosing system for volumetric dosing. The use of a flow-through valve for volumetric dosing allows for precise quantity control of the bulk material. This leads to improved process control by ensuring that exactly the required amount of material is processed.

[0034] An advantageous embodiment of the method according to the invention is achieved by using a conical nozzle as the metering unit, wherein the quantities of dry injection materials dispensed from the conical nozzle can be adjusted. Metering via a conical nozzle, where the quantities of dry injection materials dispensed are adjustable, offers the possibility of precisely adjusting the dispensing rates as needed. This flexibility is particularly useful in processes requiring variable material feed and allows production parameters to be quickly adapted to changing requirements, thus increasing the adaptability and efficiency of the entire processing operation.

[0035] Further embodiments and advantages will become apparent from the subject matter of the dependent claims and the drawings with their accompanying descriptions. Exemplary embodiments are explained in more detail below with reference to the accompanying drawings. The invention is not intended to be limited solely to these exemplary embodiments. They serve only to further illustrate the invention. The present invention is intended to relate to all subject matter that a person skilled in the art would now and in the future consider obvious for realizing the invention. Brief description of the drawing Fig. Figure 1 shows a first embodiment of the device according to the invention for moistening dry spray compound, which is equipped with a filling funnel on the dosing system. Fig. Figure 2 shows a further embodiment of the device according to the invention for moistening dry spray compound, which is equipped with a pre-container and chronic nozzle on the dosing system. Fig. Figure 3 shows a third embodiment of the device according to the invention for moistening dry spray compound, which is provided with two pre-containers for the filling funnel, which in turn feeds the dosing system. Preferred embodiment

[0036] In Fig. Figure 1 shows a schematic diagram of a device 30 according to the invention for moistening dry sprayable compounds. The device 30 has a filling hopper 1. A metering system 2 is connected to the filling hopper 1. A flow control valve 32 is used for volumetric metering. The flow control valve 32 is a mechanical device used for precise quantity control of bulk materials. This type of valve is typically used to transfer materials from one pressure range to another while maintaining precise control over the material metering.

[0037] The operation of the airlock 32 is based on a rotating cell that is installed in a housing 34. These cells are generally chamber-like and rotate around an axis. As the airlock rotates, each chamber on the inlet side fills with a specific quantity of material through the feed hopper 1.

[0038] When the chamber reaches the outlet, the material is ejected by centrifugal force or by compressed air passed through the airlock. This ensures a continuous and even material feed.

[0039] The filling hopper 1 is designed to receive dry injection molding compounds, including those containing micro hollow glass spheres and / or fibers and / or carrier materials or bulk materials. These dry injection molding compounds are then transferred to the metering unit 2, which is directly connected to the filling hopper 1 to ensure precise metering of the material. The metering unit 2 is connected to a first pressure hose 38 via a connecting element 5. One end of the first pressure hose 38 is supplied with a conveying gas 3, typically compressed air, from a conveying gas generator 40. A pressure regulator 42 controls the pressure of the conveying gas 3. An adjusting valve 4 controls the flow rate of the conveying gas 3.

[0040] An acceleration nozzle 6 is arranged in the pressure hose 38. The dry spray compound is pneumatically conveyed to the acceleration nozzle 6. This occurs at a speed that minimizes the risk of damage to the microhollow glass spheres from impacts. Within the acceleration nozzle 6, the dry spray compound undergoes a further acceleration. A second pressure hose 44 is supplied with accelerating gas 10 from the feed gas generator 40. The accelerating gas 10 is applied to the acceleration nozzle 6. The flow rate and pressure can be regulated via a control valve 11 and a pressure regulator 46, respectively. In this way, the velocity of the dry spray compound can be increased for a short period of time.

[0041] In the mixer 8, which is designed as a humidification nozzle 48, the dry spray compound is mixed with a liquid, a liquid binder such as water. The liquid is supplied to the mixer 8 from a liquid reservoir 50 via a media hose 52. The flow rate of the liquid is regulated by a control valve 7. A pressure regulator 54 regulates the liquid pressure in the media hose 52. A check valve 13 in the media hose 52 prevents liquid from flowing back into the liquid reservoir 50. A third pressure hose 56 supplies an aerosolizing gas 12, such as compressed air, from the supply gas generator 40 to the mixer 8. This aerosolizing gas 12 ensures, in particular, that the dry spray compound in the mixer 8 has as much surface area as possible for humidification. The pressure of the aerosolizing gas 12 is adjusted by a pressure regulator 58.

[0042] At the end of the pressure hose 38 is the spray nozzle 9, which is used to spray the compound onto surfaces such as walls or the like. The pressures and speeds of this device can be adjusted to minimize the damage to the microhollow glass spheres. This gives the compound its characteristic effect.

[0043] In Fig. Figure 2 shows a further embodiment of the device 30 according to the invention for moistening and processing dry sprayable compounds as a schematic diagram. Insofar as the Fig. 2 of the Fig. Since reference numerals 1 correspond to the previous embodiment, the device 30 has the filling hopper 1. However, here the filling hopper 1 is fed from two pre-containers 22, 23 with material to be processed in the device 30. The carrier mass or bulk material is located in pre-container 22. This is usually cement. The micro hollow glass spheres are located in the second pre-container 23. The materials from the pre-containers 22, 23 are mixed by metering devices 20 and 21, respectively. The metering devices 20 can, for example, be designed as screws. This allows the mixing ratio of carrier mass or bulk material and micro hollow glass spheres to be precisely set from 0 to 100%. Otherwise, the device 30 corresponds to the previous embodiment. Fig. 2 completely the Fig. 1.

[0044] The Fig. Figure 3 shows a third embodiment of the device 30 according to the invention for moistening and processing dry sprayable compounds, illustrated as a schematic diagram. Insofar as the Fig. Since Figure 3 corresponds to the previous figures, the same reference numerals are used. The embodiment of Fig. Figure 3 shows the device 30 with a different metering system 2 than the previous figures. Instead of the blow-through valve 32, a different principle is used here. The pre-container 1 is designed as a pressure vessel, which has a conical nozzle 54 at its outlet as the metering system 2, whereby the quantities of dry sprayable material discharged to the conical nozzle 54 can be adjusted. The other components correspond to the previous figures. Reference symbol list 1 filling funnel 2 Dosing system 3. Carrier gas 4 Adjustment valve for delivery gas 5 Connecting element 6 Accelerator Nozzle 7 Water adjustment valve 8 mixers 9 spray nozzle 10 Accelerator gas 11 Control valve 12 Atomizing gas 13 Check valve 22, 23 Pre-tank A, B 20, 21 Dosing organ (e.g., snail) 30 Device 32 Airlock 34 cases 38 1. Pressure hose 40 Conveyor gas generator 42 pressure regulators 44 2. Pressure hose 46 pressure regulators 48 Humidification nozzle 50 liquid reservoir 52 Media hose 54 Conical nozzle 56 3. Pressure hose 58 pressure regulators QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10211331B4

[0011] DE 29824292U1

[0012] EP 0780528B1

[0013] DE 19900655C1

[0014] US 2004092614A1

[0015] WO 2018108678A1

[0016] EP 3997048B1

[0017] EP 4196451B1

[0018]

Claims

[1] Device (30) for moistening and processing dry sprayable materials comprising, a) a filling funnel (1) and / or a pre-container (22,23) for dry sprayable materials, b) a dosing system (2) which is fed by the filling hopper (1) and / or the pre-container (22,23), c) a first pressure hose (38) which is connected to the dosing system (2) via a connecting element (5), d) a conveying gas generator (40) which pressurizes the first pressure hose (38) with conveying gas in order to pneumatically convey the dry spraying masses in the pressure hose (38) over a required distance, e) a liquid reservoir (50) which is connected to a media hose (52), f) a mixer (8) which is coupled to the pressure hose (38) and the media hose (52) via an inlet of the mixer (8), wherein the mixer (8) moistens the dry spray compound with liquid, such as water and / or a liquid binder, from the media hose (52), g) a spray nozzle (9) which is connected to an outlet of the mixer (8), characterized by , that h) Means are provided for the use of dry sprayable compounds containing micro hollow glass spheres and / or fibers. [2] Device (30) for moistening and processing dry sprayable compounds according to claim 1, characterized by , that at least one pressure regulator (42) and / or one control valve (4) is provided for the quantity control of the conveyed gas. [3] Device (30) for moistening and processing dry sprayable materials according to one of claims 1 or 2, characterized by, that at least one accelerator nozzle (6) is provided in the 1st pressure hose (38), which is supplied with accelerator gas (10) from a second pressure hose (44). [4] Device (30) for moistening and processing dry sprayable materials according to any one of claims 1 to 3, characterized by , that the mixer (8) is designed as a humidification nozzle. [5] Device (30) for moistening and processing dry sprayable materials according to any one of claims 1 to 4, characterized by , that a pressure regulator (46) and / or an adjustable flow valve (7) is provided which adjusts the amount of liquid supplied to the dry spraying masses. [6] Device (30) for moistening and processing dry sprayable materials according to any one of claims 1 to 5, characterized by, that the pre-container (22,23) is designed as a pressure vessel which has a conical nozzle (54) in the outlet, wherein the quantities of dry injection materials discharged to the conical nozzle (54) can be designed to be adjustable. [7] Device (30) for moistening and processing dry sprayable compounds according to any one of claims 1 to 5, characterized by , that the dosing system (2) is designed as a through-flow airlock (32) for volumetric dosing. [8] Device (30) for moistening and processing dry sprayable materials according to any one of claims 1 to 7, characterized by, that at least two pre-containers (22, 23) are provided, wherein a first pre-container (22) contains a dry carrier mass or bulk material and a second pre-container (23) contains the micro hollow glass spheres, wherein the mixing ratio of the dry injection material is formed in each case by dosing by means of a dosing device (20, 21) and mixing the dry carrier mass or bulk material with the micro hollow glass spheres. [9] Method with a device (30) of the preceding claims for moistening and processing dry sprayables comprising the following method steps: h) Mixing a carrier mass or bulk material and micro hollow glass spheres and / or fibers to form a dry sprayable compound, i) Feeding the dosing system (2) from a filling hopper (1) and / or a pre-container (22, 23) for dry spray compounds, j) Introducing the dry injection compound into the first pressure hose (38) via a connecting element (5), k) Pneumatic conveying of the dry injection mass through the first pressure hose (38), wherein the pressure hose is pressurized with the conveying gas from the conveying gas generator, I) Pneumatic acceleration of the conveying of the dry spray compound in an acceleration nozzle (6), which is supplied with the pressurized acceleration gas (10) from the conveying gas generator (40) of a second pressure hose, m) Moistening the dry spray compound in a mixer (8), which is supplied via a media hose (52) from a liquid reservoir (50), n) Exit of the moistened spray compound from the spray nozzle (9). [10] Method according to claim 9, characterized by , that the filling funnel (1) is metered with the micro hollow glass spheres from a first pre-container (22) and metered with the carrier mass or bulk material from a second pre-container (23). [11] Method according to one of claims 9 or 10, characterized by , that the volumetric dosing is carried out via a through-flow lock (32) as a dosing system (2). [12] Method according to one of claims 9 or 10, characterized by , that the dosing is carried out via a conical nozzle (54) as a dosing system (2), wherein the quantities of dry spray materials flowing out to the conical nozzle can be designed to be adjustable.

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