The quality of the putty laying largely depends on the skill of the contractor, who has to perform many routine technological operations. In order to optimize processes of this kind, manufacturers of finishing and repair equipment have developed special putty aggregates. With their help, mechanized wall putty is implemented, which includes the basic procedures for preparing the solution and its distribution.
Purpose of equipment
To perform mechanized (machine) putty, a special unit is used, the list of tasks of which includes floor supply, as well as direct application of the working mixture to the surface. On average, productivity is provided at the level of 0.4 m 3 / h with a mobility of 10-12 cm. As a working material, not only special putty mixtures can be used, but also plasters, adhesive and primer solutions. As a rule, manufacturers impose a ban on the use of explosive and acetone mixtures. In the full-format version of the station, it is possible to carry out the tasks of spot coating fine compositions, for which a sprayer with a compressor is used.
When mechanized puttying the walls, it is recommended to maintain the optimum temperature regime from 0 to 45 º. This is important for the preparation of the solution, and for its uniform styling. Regarding power requirements, a three-phase network with alternating current voltage of 380 V is usually used.
Putty unit design
The main parts of the equipment include a screw pump, a hopper for loading or preparing a solution, a safety valve and an electrical infrastructure with a drive mechanism. The basic set of functionality of the first level of a puttying station can include a supply hose for the working mixture, a spray solution (the so-called fishing rod like a spray gun), a plug and an air duct. The compressor unit is usually connected in a separate order and serves as a source of compressed air.
As auxiliary and consumable elements, one can distinguish a cage, screws with pump valves, gaskets, a protective casing, gaskets, a nozzle and inserts. The design is based on a metal support base with a running gear (on wheels). In the process of performing mechanized wall puttying, an aggregate with a filled tank can be moved around the working site, and the range of the stackers and sprayers will depend on the length of the mortar pipe and the power of the equipment. So, the length of the sleeve with a diameter of about 15 mm is on average 10 m. It is also necessary that the appropriate distance of the air duct from the compressor is provided. As for power, 1500 W power plants with a frequency of 1400 rpm are usually used.
Features of solutions for puttying station
The technology of machine application of putty involves the use of special finished compounds. They come in the form of dry mixes, but with a complete set of necessary ingredients. For example, professional plasterers recommend using gypsum compositions with polymer inclusions like Knauf MP 75 for such work. The advantages of this type of mixture include the possibility of use in high humidity conditions - that is, in the kitchen or in the bathroom. If we talk about surfaces on which you can apply the finished putty by machine, it can be almost all solid bases from brickwork to concrete and cellular slabs. Another thing is that different compositions may differ in specific characteristics. In the selection, it is necessary to take into account such indicators as strength, drying intensity, granularity, bulk density, etc.
Mechanized wall putty technology
The equipment is located on a free working platform so that stability and stability of its position are ensured. The dry mixture is poured into the hopper, and water begins to flow through the discharge hose. It is important to ensure that during the dilution of the composition with water, as little air as possible gets under pressure. Bubbles in the structure of the solution can subsequently be removed by thoroughly mixing with a construction mixer. According to technology, the hopper must be filled by more than 25% throughout the entire work process. Directly puttying the walls in a mechanized way is carried out using a complete fishing rod sprayer connected to the compressor station and the mortar line. In advance, it is necessary to determine the optimal nozzle format according to the diameter (on average 5 mm) and the form of release. If you plan to work with water mixtures, the temporary fluidity index of which is from 18 to 20 s, then it is better to use a nozzle with a small diameter of 1.45 mm and a cylindrical liner.
Technology benefits
The main advantage of using the machine method of puttying is productivity, which is 3-4 times higher than manual laying. The next important advantage of the technique can be called ensuring accuracy and uniformity when applying the solution. Even thin layers, provided that the sprayer is correctly selected and the appropriate supply parameters are set, are laid evenly and accurately. The same maintenance of high pressure provides high optimum adhesion during adhesion of the material to the surface. At the same time, the finished putty as such provides a number of advantages. In this segment, you can find environmentally friendly, durable and moisture resistant compounds that do not crack when laid in thick layers and due to their elasticity allow smooth surfaces to be formed.
Conclusion
With all the advantages, the machine-based method of applying putty is quite demanding in terms of organization, therefore it is rarely used in everyday life. Typically, those wishing to apply this approach hire the appropriate team. How much does wall putty cost on this technology? On average, sites from 100 to 150 m 2 are served for 250-300 rubles / m 2 . At the same time, material costs are calculated separately - up to 400-500 rubles / m 2 . If we talk about the price tags for units for performing machine putty, then the average station characteristics can be purchased for 100-120 thousand rubles.