Precautions for aluminum spraying operations

Position of the spray gun
The gun should maintain a certain tilt, in favor of the direction of the profile operation, the spray gun in the arrangement to maintain vertical parallel, the end part is maintained in a straight line, there should be no overlap between the spray gun, the position of the upper and lower spray gun to cover all the profiles with powder is appropriate.the role of
flowed air pressure control
the role of the fluidized bed is to use the role of airflow, so that the powder forms a proper fluidization state, the feel is similar to the state of liquid flow, detection of fluidization to a full state, simple operation is: when stirring the powder with a hand or stick, do not feel the presence of resistance. Fluidization facilitates the suction of powder into the catheter, under the effect of accelerated wind, produces the effect of atomization, insufficient pressure or pressure overconsection causes insufficient fluidization to produce

.
powder recycling
adsorbed to the surface of the profile only about 1/3 of all spray gun powder, scattered in the spray room more powder, recycling powder must be mixed with new powder in an appropriate proportion, the effect is better, so the powder should be recycled in a timely manner.
the closed
powder in the spray room is susceptible to the pollution of the external air suspension, the surface of the profile after the spray is prone to flocs or shrink holes, after baking affects the flatness of the profile surface, so the spray room should take closed measures to prevent the intrusion of pollutants.
residual powder in the trachea should be cleaned and cleaned in a timely manner, long-term use, easy to lump, powder easy to produce the phenomenon of spitting powder, affecting the spray effect.
spare powder bucket, in case of powder replacement, can effectively improve labor efficiency, backup powder bucket dust, moisture and other maintenance work must be done to ensure the quality of the remaining powder in the powder barrel.
Powder operation
powdering work should also be paid attention to, although the technical parameters in the normal production before the commissioning, but also from time to time through the powder window for continuous monitoring of the profile, found that the powder is shallow and unsorbented powder in a timely manner. Because the amount of powder sprayed by the manual friction gun is larger than that of the automatic gun, the hand swing speed of the manual friction gun can be appropriately accelerated. In addition, some profiles due to the impact of their own structure, powdering process to produce some dead ends, even through powdering, can not achieve normal results, these positions should be distinguished, must not blindly make powder, otherwise too much powder, thicker coating, affecting the surface quality of the profile, and wasted powder. This position is mostly located on the deep, narrow-width profiles, most of which are located on the non-decorative surface of the profile. The overall appearance effect of the profile is not very significant, because the two opposites in the groove are at the same pole and too close together, forming a mutually exclusive electric field, i.e. the Faraday shielding effect, which prevents the powder from adsorption inside the groove.
oven (curing furnace) operation
oven production process should pay attention to the problem, powder spray production process, due to the limitations of the production line, resulting in the profile in the oven running time is completed the entire baking process, although the oven in the operating procedures are relatively simple, but in the process parameters control requirements are more stringent, such as conveyor belt running speed Furnace temperature control, operating speed can be controlled by adjusting the frequency of the variable frequency motor, furnace temperature control involves the key point is the regulation of gas supply pressure, gas supply pressure requirements stable at about 1kg/cm2, to achieve this requirement, the general use of piped gas, the use of pressurized machine constantly adjust the supply pressure to ensure the normal operation of the combustion unit.