How many products can the automatic powder spraying equipment spray in a day?

Before building a painting production line, in addition to the cost of spraying equipment, I believe many customers are very concerned about one question, which is how many products can be sprayed by automatic powder spraying equipment in a day? Due to the complexity of the coating production line, the speed of powder coating is not only determined by the speed of the automatic powder coating equipment, but also by other factors, which can be said to be a ripple effect on the whole body! Next, I will analyze in detail the spraying speed issue of automatic powder spraying equipment.

Firstly, let's understand the principle and composition of the automatic powder spraying equipment in the coating production line, as well as the operation of the entire coating production line, in order to help us better understand the factors affecting powder spraying speed.

1. Working principle of powder coating in the painting production line:

Powder coating is achieved by utilizing the phenomenon of corona discharge to adsorb powder coating onto the workpiece. The process of powder spraying is as follows: the powder gun is connected to the negative electrode, the workpiece is grounded (positive electrode), the powder coating is sent to the spray gun by the powder supply system through compressed air gas, and a high-voltage electrostatic generator is added at the front end of the spray gun. Due to corona discharge, dense charges are generated near it. When the powder is sprayed from the nozzle, a circuit is formed to form charged coating particles, which are attracted to the workpiece with the opposite polarity by electrostatic force. As the amount of powder sprayed increases, the charge accumulates more. When it reaches a certain thickness, due to the electrostatic repulsion effect, it stops adsorbing, so that the entire workpiece obtains a certain thickness of powder coating. Then, through heat, the powder melts, flattens, and solidifies, forming a hard coating on the surface of the workpiece.

2. Composition of powder coating equipment in the painting production line:

The powder electrostatic spraying equipment mainly includes: powder spraying room, high-voltage electrostatic generator, electrostatic spraying gun, powder supplier, powder recovery device, workpiece rotation mechanism, etc.

(1.) Powder spraying room

The powder spraying room is one of the main equipment for powder electrostatic coating. Maintaining a smooth airflow is essential for maintaining cleanliness in the powder room and providing a clean working environment for operators. Control the dust content in the spray booth to below the explosion limit (generally set at 10g/m3). In addition, the powder spraying room should be easy to clean, so that the powder is not easily deposited in the room, in order to change the color of the powder. There should be sufficient light inside the room to facilitate the coating work.

(2.) Electrostatic spray gun

Classification: Spray guns can be divided into handheld powder guns, fixed automatic powder guns, disc spray guns, etc. according to their purposes; Divided into internal charged guns and external charged guns according to the form of charging; According to their diffusion mechanism, they can be divided into conflict guns, rebound guns, secondary air inlet guns, centrifugal cup guns, etc.

In addition, the close coordination and good operation of various parts of the coating production line are also very important factors affecting the spraying speed of automatic powder spraying equipment. For example, what is the required conveying speed for a suspended conveyor system during design to meet the powder spraying speed without affecting the quality of the spraying? The shape and size of the workpiece, as well as the requirements for powder coating thickness, all affect the speed of powder coating. The spraying speed of different workpieces varies greatly, and no company can provide an answer to the question of "how many products can be sprayed by an automatic powder coating equipment in a day" without systematic design and data evaluation.