The powder gun is connected to the negative electrode, and the workpiece is grounded (positive electrode). The powder coating is sent to the spray gun by the powder supply system through compressed air. The high voltage generated by the high-voltage electrostatic generator is added at the front end of the spray gun. Due to corona discharge, dense charges are generated nearby. When the powder is ejected from the nozzle, it forms a circuit to form charged coating particles. It is attracted to the workpiece with opposite polarity by the electrostatic force. As the sprayed powder increases, The more the charge is accumulated, when the thickness reaches a certain value, the electrostatic repulsion will not continue to absorb, so that the whole workpiece can obtain a certain thickness of powder coating, and then the powder is melted, leveled and solidified by heat, that is, a hard coating film is formed on the surface of the workpiece.

In the process of powder spraying, the powder not absorbed by the workpiece falls to the bottom of the powder spraying room. The mushroom head back blowing device at the bottom of the powder spraying room blows the powder to the recovery port. The powder is sucked into the large cyclone separator with the air flow for primary recovery. Under the action of the cyclone, the powder and air are separated. At this time, 96% - 98% of the separated powder falls into the powder collecting drum, and the powder in the powder collecting drum is pumped to the vibrating screen under the action of the powder pump, After being filtered by the vibrating screen, the powder is automatically returned to the powder supply barrel for recycling. During the operation of the large cyclone, about 1% - 4% of the ultra-fine powder enters the secondary powder recovery filter through the tuyere at the top of the large cyclone for separation. The clean air is discharged to the operation workshop or to the atmosphere. The ultra-fine powder is absorbed by the filter element. The high magnetic pulse valve inside the filter element works intermittently to blow the ultra-fine powder on the filter element to the bottom powder collector. The recovered ultra-fine powder cannot be recycled and cleaned regularly.

It has linear reciprocating motion in both vertical and horizontal directions. The speed of reciprocating motion can be adjusted. The design adjustable range of speed regulating wheel is 6 "- 24" on average. It has strong bearing capacity and can be installed with multiple sets of spray guns.

The manual powder spraying equipment can be selected by the user, including one set of electrostatic control box, one set of built-in high-voltage electrostatic generator, one detachable stainless steel powder supply barrel (matched with manual gun), one set of powder pump, powder pipe and low-voltage cable. Simple operation, automatic and rapid color change, better powder performance, PCC precise charging control mode and super corona ring technology improve quality, accurate powder usage, and flexible capacity expansion.

Convenient control of multiple spray guns, simple operation of the control panel, and application parameters can be set for up to 12 spray guns at the same time; Each spray gun can be activated and controlled independently, which is most suitable for vertical aluminum profiles, coils and other spraying applications requiring multiple spray guns; Most suitable for standard spraying line; Accurate powder usage improves the uniformity and consistency of film thickness, which can be easily controlled by even beginners. Based on application experience, three application programs are preset for spraying flat workpieces, large materials and back spraying elements; Automatic spray gun can achieve the highest powder loading rate and perfect spraying effect in any application. It is an ideal choice for rapid color change.

The robot has a separate OP control box. The control box is equipped with a 10 inch display screen. The control box can realize the switching of automatic, manual and analog modes of the machine. In the automatic mode, the robot performs automatic powder spraying under the automatic operation condition of the production line; In manual mode, the operator can spray powder by inputting the workpiece model; In the simulation mode, the operator inputs the model of the workpiece, and the robot only walks on the trajectory without spraying powder. The robot has the ability to identify empty hangers. When there are empty hangers entering, the robot will give an audible and visual alarm. The robot and the production line shall have enough safety interlock points to ensure the safety of the production process.

lighting

The illumination of the interior lighting system of the room is greater than 300lux. Explosion proof lamp tubes are used for lighting and dust covers are installed. The electrical components are of explosion-proof type. Common models and installation methods are selected to ensure the convenience of subsequent maintenance of the interior illuminance meter of the room.

Control system

The control system of electrostatic powder spraying room can realize both automatic control and manual control of the equipment. During automatic control, ensure that the catenary system, exhaust system, electric door or pneumatic type can be linked to realize the automatic and normal flow of equipment, and set sufficient safety interlocks to ensure the safety of the workpiece during operation and prevent the workpiece and the chamber door; Manual control shall ensure that all equipment can be started and stopped manually to ensure the convenience of maintenance of all equipment. Emergency stop button shall be set. After pressing the emergency stop button, all equipment will stop operation.

Stacking chain conveyor system

The stacking chain conveyor covers the upper part area, primer polishing room, soot blowing room, powder spraying room, curing room, strong cooling room and lower part area. The whole logistics chain is transported by one chain, and the drive motor is controlled by frequency converter, which is an internationally famous brand. The load-bearing gantry and hanger of the stacking chain conveyor system shall be designed according to the site conditions and workpiece style of Party A to ensure beauty, convenience, durability and convenient maintenance.