What are the problems that should be paid attention to in the spray room during spray processing?

Powder coating spray booth production is a key process in the spray production process. The key to the surface quality of spray profiles lies in the control of various process parameters in the spray process. Powder output and atomizing air are two key technical indicators. Before formal powder spraying, you can test spray several times. At this time, you can observe the size of powder output and the uniformity of powder distribution at both ends of the spray booth. At this time, the powder runs in a straight line within 10cm-15cm from the end of the spray gun, and the outside part is in the form of atomized powder. The powder adsorbed on the surface of the profile is actually the powder with this atomization effect. Does this kind of mist exist? The powder of chemical effect is used as a standard to control the distance between the spray gun and the profile. In addition to the process parameters, some necessary small links should also be noted.

(1) The position of the spray gun

The spray gun should maintain a certain inclination and be biased towards the direction of the profile. The spray guns should be arranged vertically and parallel, and the end part should be kept in a straight line. There should be no overlap between the spray guns. The upper and lower spray guns should be positioned with powder. It is advisable to cover all profiles.

(2) Control of fluidized air pressure
The function of the fluidized bed is to use the action of airflow to make the powder form an appropriate fluidized state, the hand feel is similar to the state of liquid flow, and the detection of fluidization to a full state, the simplest operation is: when the powder is stirred by hand or stick , No resistance is felt. Fluidization is convenient for powder to be sucked into the catheter, and under the action of accelerating wind, the effect of atomization is produced. Insufficient pressure or excessive pressure will cause insufficient fluidization.

(3) Recycling of powder
The powder adsorbed on the surface of the profile only accounts for about 1/3 of the powder output of all spray guns. There are more powder scattered in the spray booth. The recycled powder must be mixed with the newly added powder in an appropriate ratio. The effect is better, so the powder should Recycle and reuse in time.

(4) Sealing in the spray booth
The powder is easily polluted by suspended air from the outside. After powder spraying, the surface of the profile is prone to flocculation or shrinkage, which will affect the flatness of the profile surface after baking. Therefore, the spray booth should be closed to prevent the intrusion of pollutants.

(5) The residual powder in the air pipe should be cleaned up in time. If it is not used for a long time, it is easy to agglomerate, and the powder is easy to spit out, which affects the spraying effect.

(6) Spare powder bucket
It can be used when changing powder, which can effectively improve labor efficiency. Dust-proof and moisture-proof maintenance work of the spare powder bucket must be done to ensure the quality of the remaining powder in the powder bucket.

(7) In addition, the work of replenishing powder should also be paid attention to
Although the various technical parameters have been debugged before the production is normal, it is necessary to constantly monitor the profile through the powder replenishment window, and replenish the powder in time when the powder is found to be shallow and where the powder is not adsorbed. Since the powder output of the manual friction gun is larger than that of the automatic gun, the hand swing speed of the manual friction gun can be appropriately increased.
In addition, due to the influence of its own structure, some profiles have some dead ends during the powder spraying process. Even if the powder is added, the normal effect cannot be achieved. These positions should be distinguished, and the powder must not be blindly added, otherwise there is too much powder and the coating film Thickness affects the surface quality of the profile and wastes powder. This position is mostly located on the profile with deeper grooves and narrower width, and most of these grooves are located on the non-decorative surface of the profile. The effect on the overall appearance of the profile is not great. The reason is that the two opposite faces in the groove are at the same pole and the distance is too close, forming a mutually repulsive electric field, that is, the Faraday shielding effect, which hinders the adsorption of powder inside the groove.

Found in 2006, Hangzhou Guozhen WanXin Coating Equipment Manufacturing Co.,Ltd is a professional China Powder Spray Booth Manufacturers and Powder Spray Booth Factory, our company that integrates R & D, production and sales, specializing in the manufacturing of powder coating equipment and flocking machines , our company found in 2006, located in Hangzhou city, and the production base in Jiangsu province, our factory covers an area of about 24,000 square meters , we has advanced production equipment, supporting facilities and a complete range of testing instruments.Powder coating equipment including: powder coating machines, Automatic powder coating systems, Powder Coating booth ,Cyclone type powder coating recovery system, Ovens, powder coating production line and various spare parts for different brand powder guns. Flocking equipment including: Printing flocking machine, Box-type flocking machine, portable flocking machine, Spray gun type Flocking machine and Automatic flocking lines and so on. WANXIN products are in line with international standards and have passed a number of quality certifications, such as CE, SGS , ATEX, ISO9001, Welcome!