The use of machine plaster walls allows you to get perfectly flat surfaces. Which are well suited for further finishing. The quality of plastering is much higher than when using the manual method.
This technology involves the use of a special device. Its main task is the mixing of the solution and high-quality mixing. As a result, it is possible to obtain a composition that is ideal in consistency. The manual part of the work consists only in filling the necessary components in the required amount inside the device. In the mixing part, the composition is mixed, and the material is fed from the storage hopper to the surface. A special nozzle allows you to evenly spray the composition on the wall. This device has a complex structure, so it is not easy to make such a device.
Features of mechanized plastering. Professional opinion
Reading reviews of mechanical plaster walls, you can understand that the master performing the work should only direct the hose from the device. At the same time, trying to ensure a uniform distribution of the mixture in relation to the lighthouses. If the mortar is applied in excess, it will reduce the strength of the plaster. Otherwise, gaps may appear on the walls. The most optimal thickness value varies from 10 to 35 mm.
The device has a reservoir, inside which liquid with cement enters. A certain program allows the device to independently control the proportions of ingredients, which, according to home masters, is very convenient. Inside the tank, the ingredients are combined together.
Tips given opinions
Familiarizing yourself with reviews of mechanical plaster walls, you can understand that nozzles speed up the speed of work. Leveling the mixture on the wall can be done with large spatulas. According to the masters, the speed of such plastering is 5 times higher compared to manual. 2 people will be enough to perform the work. One must apply the compound, and the second can smooth.
Work methodology
Reviews of mechanical wall plastering suggest that it is necessary to start work by measuring the curvature. To do this, use the level. Aluminum guides are installed on the outer corners. The work is automated and involves applying the mixture to the surface. At firstyou need to connect the device to electricity and water. Dry powder is placed inside the hopper.
Some machines are equipped with a pump that pumps water if there is no centralized water supply on the site. The plaster composition is delivered by means of a falling screw into a special chamber, where it is connected with water. During the entire working process, the machine carries out mixing of the mixture. The quality of the solution is very high. The mixture has good adhesion to the substrate.
Technology opinions
Reading reviews of mechanical plaster walls, you can understand that the work is done in several stages. The mixture is then transported to the surface through a hose. Leveling can be done with a rule, trowel or spatula. The type of tool used, according to the masters, is determined by the place and nature of the work.
Once the surface is leveled, the mortar is left to dry. In order to control the evenness of the plaster, a level is used. Small defects in the form of scratches can be eliminated by grinding with a special sponge.
Main advantages of the method
There are quite a few advantages of mechanical plastering of walls compared to manual ones. First, mixing the solution and bringing it to the desired consistency is an automated process. This reduces the physical cost of plastering. Secondly, at all stages of work it is possible to obtain a solution with the same consistency, because the machineprovides constant mixing of the mixture. In this regard, the surface is not covered with bumps and cracks.
Thirdly, this method allows you to reduce the volume of mortar for application to the wall. It is impossible not to mention also the time of execution of works. It is reduced several times compared to the manual method. You will also like the high quality of the surface. There will be no defects on it, and the texture will be smooth.
Main flaws
There are few downsides to mechanical wall plastering, but they do exist. Among them, it should be noted that machine stations are quite expensive. It is beneficial to purchase such equipment if you plan to work with large areas or professionally. In addition, such devices provide for the need for constant maintenance. After work, the hoses will need to be thoroughly cleaned of the remnants of the solution, which complicates the process. During operation, you may not be satisfied with the fact that the machine makes a lot of noise.
Mix for plaster. What should I use?
Mix for mechanical wall plastering is available in two versions - liquid and dry. With their help, you can process different surfaces, based on:
- aerated concrete;
- reinforced concrete;
- drywall;
- brick;
- concrete.
The temperature interval for using the solution is limited to + 5 to 30˚С. The surface should initially be treated with a primer, which improves the adhesion between the plaster and the wall. After the layer has dried,further work. If you are performing facade plastering, then the mixture should be made on a cement-sand basis. Water is used for breeding. Additives to the composition help to adjust the level of plasticity and setting time.
Gypsum-based mixtures can be used for internal plastering. They set quickly, but are only suitable for rooms with a normal level of humidity. Such materials allow air to pass through, so they allow the walls to breathe. This helps to achieve an even finish for further finishing.
If you use a cement-sand composition, then before further work you will need to wait until it dries completely so that the material gains strength. The composition for application by machine should be more liquid than that used by hand.
Equipment for work
As an example of equipment, consider the PFT G4 plastering station. It is powered by a 400 V motor. The pump power is 5.5 kW. The number of revolutions of the pump per minute is 400. The feed drum has a power of 0.75 kW.
The main indicator of work is the volume of the mixture dispensed per minute. It is 20 liters. The feed range reaches 30 m with a diameter of 25 mm. The working pressure is 30 bar. The design provides for electric or pneumatic remote control. The diameter of the air hose is 13 mm. The filling height is 910 mm. The receiving hopper holds 150 liters.
PFT G4 plastering station has the followingdimensions: 1200x720x1550 mm. The total weight is 250 kg.
Distinguishing Features
This equipment has a high performance with the ability to adjust from 6 to 55 liters of mixture per minute. Adjustment can be made by changing the screw pair. The station is universal, its compressor has a high pressure switch that operates in automatic mode. This device for mechanical wall plastering can work with other machines. The device does not provide complex maintenance. Its cleaning is convenient and easy.
User Manual
The equipment has a safety device that activates the tilt switch. It is located in the motor terminal box. The switch is activated when the shutter opens when the engine is tilted. If the machine is on uneven ground, the switch will operate.
Before starting the operation, the wall plastering machine must be prepared. To do this, a locking roller is fixed. The machine must be placed on a level surface and secured against unintentional movements. During operation, it is important to avoid movement or rocking of the station. It is important to make sure that there is no danger of foreign objects falling on the machine. Controls should be easily accessible. It is important to provide a space of 1.5 m around the machine.
After connecting to the three-phase current network, the pressure maintenance pump is connected. It is important to connect the air compressor and its drive. The next step is to connect to the plumbingfittings. It is necessary to close the water intake valve and connect a drain valve to the pump.
The PFT G4 must only be used with clean water that is free from impurities. The water pressure should be 2.5 bar or less. Dry running is unacceptable, as this shortens the life of the pump. The water hose should be disconnected from the mixing tower and the water supply tap should be opened.
Work technology
The relevance of mechanical plaster is justified in large areas. Plastering can take several days, while manually completing such work could only take a week or more. For mechanized application of the mixture, a plastering station or a gun with a compressor should be prepared, which will supply the composition under pressure. This allows you to get perfectly smooth walls with a durable layer and a long service life.
The plastering station is an independent system. A solution is being prepared inside it. At the next stage, he gets to the gun and is fed to the wall. But first, the mixture must be poured into the bunker, where water is poured. The gun should be held as tightly as possible, because the solution comes under high pressure. The gun must be held at right angles to the ground.
Another option for machine plastering is to use a cartridge gun. This device does not prepare a solution, but involves pouring the finished mixture into the upper part of the device. You will need to enablecompressor that sprays the solution on the surface. The gun will need to be held in hand. It creates a high mechanical load on the operator, and therefore is less convenient than a plastering station.
Alternative mechanical plaster
Another method of mechanical plastering is to use a pneumoshovel. It provides for throwing the solution thanks to a steel container that scoops up the mixture. Shovels can be designed for ceilings or walls. They also differ in shape, location and size of buckets. Their additional advantage is that such equipment is not so expensive, which means that it can be purchased for personal use.
Productivity here will be lower than when using the station. Before applying plaster, prepare the surface. To do this, the ceiling or walls are cleaned, beacons are installed. Next, you can start applying the primer, then the corner guides are installed. After that, plastering begins.
