What is the difference between liquid paint and solid paint, and what is the difference in construction process!

In addition to the essential difference between liquid coatings and solid coatings, their construction processes are also completely different.

1.

1.

Brushing paint is the most widely used, but the coating efficiency is low, and the production scale has reached a certain level.

2.

Spraying is the most widely used coating technology in the mechanical and electronic industries, and it is also the most polluting process in all coating processes.

3.

Dip coating is mainly suitable for small cores.

4.

Flow coating is widely used for coating sand cores and medium and small molds.

5.

Used for single-sided or double-sided high-speed continuous mechanical coating of thin plates or strips.

6.
Curtain coating

Curtain coating is mainly used for sheet or strip coating.
The paint is pumped or overflowed by gravity to form a "paint curtain" through the adjustable gap, which is applied to the surface of the workpiece.
Curtain coating is a high-speed coating process with the least paint loss.

7.
Roll coating or rotating drum coating

Roll coating or rotating drum coating can more effectively control the accuracy and flatness of the plate, and successfully eliminate the traditional bumps and wrinkles.
Therefore, it is often used for small parts such as screws, nuts, and small screws with a unit weight of less than 0.
5kg.
It is a process of sprinkling a certain amount of paint on the roller or rotating drum holding the workpiece to make the paint evenly stick to the surface of the workpiece.

8.
Electrophoretic coating

Mainly refers to "cathodic electrophoretic coating", which is widely used in the motor vehicle industry, and is widely used in building materials, light industry, household appliances and other industrial fields, as well as surface anticorrosion and decoration of hardware and handicrafts.
Cathodic electrophoresis is that the positively charged cationic resin moves towards the cathode after it is energized.
As the pH value near the cathode rises, particle exchange occurs, and the cathode paint is deposited and coated on the test piece.

2.
Solid coating coating technology

Solid coating application is called "powder coating".
It does not use solvents, but after coating the fine powder of the coating material on the workpiece, it is melted at a temperature exceeding the melting point of the powder to form a paint film on the workpiece.
Powder coating includes three processes: "electrostatic spraying", "fluid bed" and "static current bed".
Under the condition of powder collection and reuse, the utilization rate of powder coating is almost 100%.
"Electrostatic spraying" uses electrostatic adsorption to adsorb the powder coating on the workpiece at room temperature, and then heat it to melt to form a paint film.
The "fluid bed" is to put the workpiece preheated above the melting point of the coating into the fluidized suspended coating powder, and the coating powder in contact with the workpiece is melt-coated on the workpiece to form a paint film.
"Electrostatic bed" is to set the electrode in the powder chamber so that the negative charge of the fluidized bed coating powder is adsorbed on the grounded workpiece.
There is no solvent pollution problem in powder coating, mainly the recycling problem of coating powder.