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The spray guns should maintain a certain inclination, which is biased towards the running direction of the profile. The spray guns should be kept vertically parallel in arrangement, and the end parts should be kept in a straight line. There should be no overlapping parts between the spray guns. It is advisable to cover all profiles.
Control of fluidizing air pressure
The control of fluidized air pressure, the function of the fluidized bed is to use the effect of the air flow to make the powder form a proper fluidized state, the hand feel is similar to the state of liquid flow, and the fluidization is detected to reach a sufficient state. The simpler operation is: use When the powder is stirred by hand or stick, there is no resistance. Fluidization facilitates the suction of powder into the duct. Under the action of accelerated wind, the effect of atomization is produced. Insufficient or excessive pressure will cause insufficient fluidization.
Powder recovery and reuse
The powder is recycled and reused. The powder adsorbed on the surface of the profile only accounts for about 1/3 of the powder output of all spray guns, and there are many powders scattered in the spray booth. The recycled powder must be mixed with the newly added powder in an appropriate proportion. Better, so the powder should be recycled and reused in time
Sealing in the spray booth
Due to the closedness of the spray booth, the powder is easily polluted by suspended matter in the outside air. After spraying the powder, the surface of the profile is prone to produce flocs or shrinkage cavities, which will affect the flatness of the profile surface after baking, so the spray booth should be closed. , to prevent the intrusion of pollutants.
The residual powder in the trachea should be cleaned up in time. If it is not used for a long time, it is easy to agglomerate, and the powder is prone to spit powder, which will affect the spraying effect.
The spare powder bucket is used for powder replacement, which can effectively improve labor efficiency. The maintenance work of the spare powder bucket, such as dustproof and moisture-proof, must be done well to ensure the quality of the remaining powder in the powder bucket.
Powder replenishment operation
The work of powder replenishment should also be paid attention to. Although all technical parameters have been debugged before the production is normal, the profiles must be continuously monitored through the powder replenishment window from time to time. If the powder is found to be shallow or the place where the powder is not adsorbed, the powder should be replenished in time. pink. Since the amount of powder sprayed by the manual friction gun is larger than that of the automatic gun, the manual swing speed of the manual friction gun can be appropriately accelerated. In addition, due to the influence of its own structure, some profiles have some dead angles during the powder spraying process. Even through powder replenishment, the normal effect cannot be achieved. These positions should be distinguished, and powder replenishment must not be done blindly. If it is thicker, it will affect the surface quality of the profile and waste powder. This kind of position is mostly located on the profiles with deep grooves and narrow width. The same poles and the distance are too close to form a mutually repulsive electric field, that is, the Faraday shielding effect, which hinders the adsorption of powder inside the groove.
Oven (curing oven) operation
Problems that should be paid attention to in the production process of the oven. In the production process of powder coating, due to the limitation of the production line, the running time of the profile in the oven is to complete the entire baking process. Although the operation procedure of the oven is relatively Simple, but stricter in process parameter control, such as the running speed of the conveyor belt and furnace temperature control, the running speed can be controlled by adjusting the frequency of the frequency conversion motor. The key point involved in the furnace temperature control is the adjustment of the gas supply pressure. The gas pressure is required to be stable at about 1kg/cm2. To achieve this requirement, pipeline gas is generally used, and a pressurizer is used to continuously adjust the gas supply pressure to ensure the normal operation of the combustion device.
position of spray gun
The spray guns should maintain a certain inclination, which is biased towards the running direction of the profile. The spray guns should be kept vertically parallel in arrangement, and the end parts should be kept in a straight line. There should be no overlapping parts between the spray guns. It is advisable to cover all profiles.
Control of fluidizing air pressure
The control of fluidized air pressure, the function of the fluidized bed is to use the effect of the air flow to make the powder form a proper fluidized state, the hand feel is similar to the state of liquid flow, and the fluidization is detected to reach a sufficient state. The simpler operation is: use When the powder is stirred by hand or stick, there is no resistance. Fluidization facilitates the suction of powder into the duct. Under the action of accelerated wind, the effect of atomization is produced. Insufficient or excessive pressure will cause insufficient fluidization.
Powder recovery and reuse
The powder is recycled and reused. The powder adsorbed on the surface of the profile only accounts for about 1/3 of the powder output of all spray guns, and there are many powders scattered in the spray booth. The recycled powder must be mixed with the newly added powder in an appropriate proportion. It is better, so the powder should be recycled and reused in time.
Sealing in the spray booth
Due to the closedness of the spray booth, the powder is easily polluted by suspended matter in the outside air. After spraying the powder, the surface of the profile is prone to produce flocs or shrinkage cavities, which will affect the flatness of the profile surface after baking, so the spray booth should be closed. , to prevent the intrusion of pollutants.
The residual powder in the trachea should be cleaned up in time. If it is not used for a long time, it is easy to agglomerate, and the powder is prone to spit powder, which will affect the spraying effect.
The spare powder bucket is used for powder replacement, which can effectively improve labor efficiency. The maintenance work of the spare powder bucket, such as dustproof and moisture-proof, must be done well to ensure the quality of the remaining powder in the powder bucket.
Powder replenishment operation
The work of powder replenishment should also be paid attention to. Although all technical parameters have been debugged before the production is normal, the profiles must be continuously monitored through the powder replenishment window from time to time. If the powder is found to be shallow or the place where the powder is not adsorbed is found, the powder should be replenished in time. pink. Since the amount of powder sprayed by the manual friction gun is larger than that of the automatic gun, the manual swing speed of the manual friction gun can be appropriately accelerated. In addition, due to the influence of its own structure, some profiles have some dead angles during the powder spraying process. Even through powder replenishment, the normal effect cannot be achieved. These positions should be distinguished, and powder replenishment must not be done blindly. If it is thicker, it will affect the surface quality of the profile and waste powder. This kind of position is mostly located on the profiles with deep grooves and narrow width. The same poles and the distance are too close to form a mutually repulsive electric field, that is, the Faraday shielding effect, which hinders the adsorption of powder inside the groove.
Oven (curing oven) operation
Problems that should be paid attention to in the production process of the oven. In the production process of powder coating, due to the limitation of the production line, the running time of the profile in the oven is to complete the entire baking process. Although the operation procedure of the oven is relatively Simple, but stricter in process parameter control, such as the running speed of the conveyor belt and furnace temperature control, the running speed can be controlled by adjusting the frequency of the frequency conversion motor. The key point involved in the furnace temperature control is the adjustment of the gas supply pressure. The gas pressure is required to be stable at about 1kg/cm2. To achieve this requirement, pipeline gas is generally used, and a pressurizer is used to continuously adjust the gas supply pressure to ensure the normal operation of the combustion device.
