For the quality of the painting works, subject to compliance with all security measures requires proper equipment and resources.All equipment, including space for the preparatory work and spray booths, fans and compressors, all the tools and grinders must be chosen carefully.As for painting and drying chambers, they can produce their own hands with the strictest observance of the recommendations set out below and instructions.
- Purpose painting and drying chamber
- design painting and drying chamber
- installation methods
- lighting system
- Types of painting and drying chambers
- The principle of painting and drying chamber
- mode painting
- Exposure Mode Mode
- purge mode
- Production of painting and drying chamber
Purpose painting and drying chamber
mainappointment of painting and drying chamber acts lacquer or paint on the surface and provides a smooth, high-quali
spray booth provides carrying out painting work in accordance with the regulated provisions of fire safety and sanitary hygiene and performed as a closed room with a variety of technological equipment.Depending on the purpose of painting and drying chambers are used for the needs of the service stations, paint areas of specialized production and private buildings.
design painting and drying chamber
painting and drying chambers are made up of these structural units: a closed chamber for the process of painting and drying, fresh air ventilation system with air filters of different levels of purification, heating systems with heat generator, lighting systems and exhaust ventilation system with airfilters.
You may need caprolon rods preobresti which you can in specialized stores.He applied for the manufacture of structural parts and antifriction.
Installation of painting and drying chamber sb 7427 can be carried out in two ways.In the first case, set painting and drying chamber for pre-formed concrete foundation base, laying a light strip foundation, the upper base of which is at the level of the floor space.This technique camera setup is fairly robust, but very expensive.
In the second method of painting and drying chamber is mounted on a raised metal structure.The construction is made of high-quality profiled metal.The disadvantage of this method lies in the difference in height between the floor painting and drying chamber and workshops that require additional installation of the transitional ladders or bridges.
painting and drying chambers equipped with door with a good seal.For painting walls camera generally used heat resistant white paints, to control the quality of the painted surfaces.The most popular for this purpose are powder coatings, which are durable and resistant to external influences.In the inter-wall space, the camera has a non-combustible insulation to avoid heat loss in the process of painting and drying.
When working in painting and drying chamber may happen twists and forming dead zones.Therefore, the device of painting and drying chamber should be performed so that the ceiling and floor air filters are located on the entire width of the room.To the dead zone does not appear within the painting and drying chamber, its exhaust ventilation system equipped with a shut-off and control valves, which is located in the underground space.
Designed circulation and special valves allow to protect themselves from turbulent eddies within the painting and drying chamber and to maintain the pressure at the required level.This is important because the extent of pollution filter floor, the pressure in the chamber increases, which results in a paint mist.On the other hand insufficient pressure provokes dust from entering, which negatively affects the quality of the lacquer or paint coating.
To effectively remove solvents and aerosols need speed air flow of about 20 centimeters per second.Accepted to maintain air flow rate of 25 centimeters per second.A simple calculation shows that to achieve such a speed camera at the area that is 28 square meters, the camera requires a capacity of approximately 25,000 cubic meters of air per hour.
drying chamber temperature conditions created by the drying heat exchanger, which for safety reasons in case of overheating is equipped with a safety thermostat.For electrical equipment like camera, always require the implementation of protective grounding.
Be sure to pay attention to the performance of heat.For example, for heating of 18,000 cubic meters per hour of air in the spray-drying chamber saima to a temperature of 40 degrees is necessary to spend 240.192 kilowatts.Remember that with lower productivity in the winter will be cold to paint.
material acts as a heat exchanger temperature-stabilized stainless steel.The type and shape of the heat exchanger are selected depending on the design of the burner, which is controlled by the automation for maintaining strict air temperature in the chamber.
are three basic types of heat generators: diesel, electric and gas heating.Electric heat source is used very rarely due to a significant increase in the duration of heating and cooling, painting and drying chamber.This is due to a high level of inertia of the heating elements that heat up and cool down for a long time.In addition, this type of heat source is characterized by high power consumption - 88 - 196 kW.
Heat a gas burner works fine, but need long-term, costly negotiation and drafting of the connection to the gas distribution network.It works best diesel heat source.In addition, it does not require costly and time-consuming coordination with the Fire Department and the SEC.
Standard painting and drying chamber is in the ceiling of the chamber 8 - 10 lamps, which are located at an angle of 45 degrees.For high-quality color lamps need to be integrated in the side walls.If the figure painting and drying chamber are only the upper lighting, there may be problems with painting vertical surfaces of multilayer coatings.
Thus, lighting lamps in the spray-drying chamber mounted on the ceiling and on the walls further.Such lighting is quite functional, as it allows to achieve the best effect when assessing the evenness and quality of the painted surface.The standard size light painting chambers of 1000-2000 lux.Also, the camera must be equipped with lighting of the rear wall, because the front is a painting more intense.Choose a model with the lowest accepted flickering effect.
specifics of painting and drying chamber requires the installation of air filters with the operational assembly and disassembly of the filter elements.Distribute filters over the entire area of the ceiling and floor of the cell.The design is equipped with filters in a manner to clean removable and fresh air.Sanitary standards specified cumulative level of cleaning air filters at no less than 99%.
This high value can be obtained only when using a multi-stage filtration.The air is cleaned in the first stage of coarse particles, and subsequently - from a fine fraction and volatile compounds.Purged painting and drying chamber nova verta air to remove combustible materials that form flammable mixture with air oxygen.
Lower filter try not to install directly on the exhaust duct, or too rapid contamination of the filter elements require frequent replacement.Moreover, when mounted on the duct area is restricted filtering surface, which provokes a constriction of the air flow velocity and increase its undesired pressure rise inside the painting and drying chamber.
If possible, you can set the filter pollution control sensors in automation.The remote management as simple indexing and modes automatically adjust the signal from the built-in timer.On the remote handy to have the ability to switch between manual and automatic modes.
Types of painting and drying chambers
painting and drying chambers from each other differ in the way of heating and ventilation.The methods of ventilation are different.Air exposed to the two fans made with the helical turbine.Screw the fan is equipped with turbine blades which are screwed in the air as the ship or aircraft propeller.They provide high productivity and are considered quite economical.
Centrifugal fans are in turbine design, which is a wheel with blades that rotate in a housing in the shape of a snail.Air penetrates into the center of the turbine and is discarded by the centrifugal force in the direction of rotation of the cochlea.Create a centrifugal fan static pressure.The air to the turbine may be suitable for ventilation pipes.
air supply to the destination from the turbine can also occur through the ventilation pipes.A suction fan draws air from the chamber, which is contaminated with solvent vapors and dust from the paint.The second blowing fan takes the outside air and pumps it into the camera.Depending on the characteristics of the ventilation system following types of painting and drying chambers: the chamber with an increased pressure from the flow-through of air and vacuum.
cameras with increasing pressure are the most common.Blower capacity is more than a fan sucking.This excess air creates a pressure that is slightly higher than atmospheric pressure.Dust outside, thus misses the chamber because the air is forced out through the unsealed joints outwardly.In this camera, you can enter into the operation.The camera does not require careful sealing chambers.However, this camera still occurs dust - dry dirt on the car.Also bad is pulled from the paint mist.
schemes painting and drying chambers with the air flow are two fans the same performance.The pressure inside and outside the chamber is the same.The unit is sealed, otherwise dust can fall through the cracks.
painting and drying chambers have a vacuum in its design sucking fan better performance than the blast.You can use only one suction fan, which also produces the air intake for the update.Some camera models are characterized by this arrangement air inlet and outlet, the car for painting and drying is placed in an air flow, if it is in motion, as opposed to the traditional location where the absorption takes place at floor level.These cameras are the best conditions for the extraction procedure mist of paint.
The principle of painting and drying chamber
painting and drying chambers that are designed to process color components and subsequent drying, despite this, are able to operate in four modes: color, exposure, drying and purging.Below is list them and give a brief response.
equipment heats the chamber or painted surface to the temperature at which the product is made from the painting gun.This temperature ensures the most favorable conditions for the evaporation of diluents.During dyeing temperature is considered optimal 20 degrees above zero, the temperature during drying is within 60 + - 70 degrees Celsius.
air heated by electric coils or a gas burner, but it is done often by burning diesel fuel.Generators of warm air are located separately from the camera.The air taken from the atmosphere and into the strainers from dust.Supply fan the air passes through the heat exchanger for heating.The heated air passes through the air ducts in the attic space, and then follows through a fine filter disposed in the ceiling in the chamber.
These fine filters are located throughout the space ceiling, which excludes the possibility of turbulent air flow.The air stream flows evenly from top to bottom, skirting the product that is painted.Paint particles can linger floor filters that are located under the bars.It heats the air only when the ventilation system.When planned or sudden system shut down immediately stop the heating.
The transition from painting to drying does not happen instantly.The camera switches to a special phase of exposure to clean air in the room from the solvent residues, duration 15 minutes.During this time the camera is removed from the residual solvents and dust.When the specified time expires, in the supply unit opens the air damper, and painting and drying cubicle into the next drying cycle.All these operations are carried out automatically.
exhaust fan in the drying mode is switched off automatically and the camera operates in the phase of recycling with a fence from the street about 10-15% of fresh air to prevent oversaturation of solvents recycled air that can cause matting and varnish formation of an explosive mixture.Drying mode due to the principle of recycling is very economical, even though the price of painting and drying chamber: low power consumption, and fuel consumption is only 40% compared to the color mode.
air passes through the recycling bag filters that are responsible for the pre-cleaning, floor and ceiling filters.The air is cleaned of dust and at the camera in a phase of drying.The use of powerful fan allows air velocity to maintain almost the same level as in the mode of color detail.
Options aggregate unit sizes matched to the camera.Power burner provide the desired operating modes in all the coasts of annual temperatures.Oil burner ensures normal operation of painting and drying chamber at a temperature outside from 10 to 40 degrees below zero.
regime decided to carry out the drying at a temperature of 60 degrees C. When the temperature is greater than 80 degrees might be burning the paint.Heating above 60 degrees withstand bad tableware made of plastic materials which are used for the assembly of the body, avtorezina, engine parts, panels, electronic equipment and appliances.Fuel is often natural gas or diesel fuel.The first is used less often because unsafe and expensive start their own individual gas station.
After the drying, which normally takes 30 minutes, the burner is switched off, the choke valve is closed and turn on the exhaust unit.Purge mode is carried out by feeding in the spray-drying chamber outside air.