Teflo spraying process, how to spray

1. Dispersion coating

The processing method of dispersion coating is a wet processing in which the coating material is uniformly distributed in the solvent to form a dispersion, and the solid substance is mixed in the liquid. This mixture is atomized by high-pressure air and sprayed on the surface of the workpiece.

The processing steps of dispersion coating are divided into the following steps:

1. Preparation of the workpiece

2. Wet dispersion coating spraying

3. Dry

4. Sintering

Workpiece preparation

In order to obtain sufficient surface adhesion on the surface of the workpiece, all grease on the surface to be coated must be removed first. We use organic solvents to dissolve the grease and heat it to about 400°C to completely volatilize it. The next step is to clean the workpiece and make the surface rough by mechanical means of sandblasting. The bonding ability of the coating with the surface layer of the workpiece can be improved by applying bonding additives and primers.

Wet dispersion coating spraying

The spray coating material must be uniform. The thickness of the coating depends on the coating system used. The thickness of the coating may vary from a few microns to 200 microns? 0.2 mm?

dry

The wet coating is heated in the oven, and the temperature is controlled below 100°C until most of the solvent has evaporated.

sintering

The sintering step is to heat the workpiece to a higher temperature until an irreversible reaction occurs. The coating material

Melting

Forms a network structure with the bonding aid.

2. Powder coating

The powder coating processing method is a dry processing? The coating material used here is in the form of extremely fine solid particles.

Using this coating method avoids the use of solvents and subsequent divergence when the coating is attached.

The processing adopts a proper method to make the micro-powder-like coating particles adhere to the workpiece, and then the coated micro-powder is melted in the oven.

The powder coating processing procedure is divided into the following steps:

1. Preparation of the workpiece

2. Powder spraying

3. Powder melting

Workpiece preparation

In order to obtain sufficient surface adhesion on the surface of the workpiece? All grease on the surface to be coated must be removed first. We use

The organic solvent dissolves the oil and heats it to about 400°C to completely volatilize it. The next step is mechanical cleaning with sandblasting

Clean the workpiece and make its surface rough. The bonding of the coating with the surface layer of the workpiece can be improved by applying the bonding agent primer.

ability.

Powder spraying

The powdery particles are blown out of the trap by compressed air. On their way to the nozzle of the spray gun, there is an area charged with static electricity.

Because the particles have the same charge, they repel each other on their flight paths and form a uniform cloud-like spray. To be sprayed

The coated workpiece is grounded so that an electrostatically charged area is formed between the spray gun and the workpiece. The powdery particles are attracted to the workpiece? and

Attach to it.

Powder melting

There are principle differences between high temperature spraying and low temperature spraying in coating technology. If the temperature of the high temperature spray substrate is

The powdery particles above the melting temperature of the powder material are coated on it, so that the powder is melted during the spraying process. Low temperature spray

Coating this processing method is that the temperature of the substrate is lower than the melting temperature of the powder material. Then melt in the oven