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Vertical Pre-mixer for powder coating manufacturers tell you the production process and precautions of powder coatings

Vertical Pre-mixer for powder coating manufacturers tell you the production process and precautions of powder coatings

  • Categories:Industry news
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  • Time of issue:2022-05-09
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(Summary description)Vertical Pre-mixer for powder coating manufacturers tell you that powder coatings are solid coatings in the form of fine powders. Powder coatings are divided into two categories: thermoplastic powder coatings and thermosetting powder coatings.

Vertical Pre-mixer for powder coating manufacturers tell you the production process and precautions of powder coatings

(Summary description)Vertical Pre-mixer for powder coating manufacturers tell you that powder coatings are solid coatings in the form of fine powders. Powder coatings are divided into two categories: thermoplastic powder coatings and thermosetting powder coatings.

  • Categories:Industry news
  • Author:
  • Origin:
  • Time of issue:2022-05-09
  • Views:0
Information

Vertical Pre-mixer for powder coating manufacturers tell you that powder coatings are solid coatings in the form of fine powders. Powder coatings are divided into two categories: thermoplastic powder coatings and thermosetting powder coatings. Today, the editor will explain to you the production process and precautions of powder coating.

Discount Vertical Pre-mixer for powder coating from China manufacturer
Powder coating is a new type of solvent-free 100% solid powder coating, which is transferred to the object to be coated in powder form, and is a coating that is baked, melted, and cured to form a film. It is a special variety of coatings. It is prepared by mixing special resin, pigments and fillers, curing agent and other auxiliary agents in a certain proportion, and then through hot extrusion, crushing and sieving. Powder coating has the characteristics of no solvent, no pollution, energy saving and environmental protection, saving resources, reducing labor intensity and high mechanical strength of coating film. Vertical Pre-mixer for powder coating manufacturers tell you that they are stable in storage at room temperature. After electrostatic spraying or fluidized bed dipping, they are heated and baked to melt and solidify to form a flat and bright permanent coating, which can achieve decorative and anti-corrosion properties. Purpose. Powder coatings are widely used in many fields of our national economy.
Production process and precautions:
1. Raw material preparation
Coatings are mixed with special resins, pigments and fillers, curing agents and other additives in a certain proportion. The selection of raw materials has an important impact on the quality and coating performance of powder coatings.
2. Premix
The pre-mixing process is to uniformly mix resin powder, pigments and fillers, curing agent, leveling agent and various auxiliaries according to the formula to create a good physical condition for melt-kneading, which is more conducive to uniform dispersion. Vertical Pre-mixer for powder coating manufacturers tell you that the pre-mixing time can be determined according to the experiment during pre-mixing. Once the mixing time is stabilized, it is best not to change it at will, otherwise it will affect the dispersion of the material and the color change of the final coating film.
3. Melt extrusion
The melt mixing extrusion process is an important link in the manufacture of powder coatings. Through mixing, the components of the powder coatings are uniformly dispersed in the molten state of the resin. It overcomes the separation of components due to different specific gravity of materials during dry mixing.
The melt extrusion equipment is an extruder, and there are two types of extruders, one is a single-screw extruder and the other is a twin-screw extruder. Vertical Pre-mixer for powder coating manufacturers tell you that reasonable process parameters need to be determined for materials of different properties to ensure a good mixing effect. The extrusion process requirements of thermosetting powder coatings are very strict, and the extrusion temperature and material must be well controlled. Residence time in the barrel.
4. Cooling and grinding
The melt from the extruder should be immediately extruded into thin sheets and cooled in time to prevent the heat of the melt from accumulating, preventing chemical changes in the components and affecting the quality of the product. Then it is finely pulverized. In order to make the production process reasonable and convenient, the fine pulverizers currently used in China often combine the pulverizer and the particle size classification part to form a pulverizing equipment unit. The manufacturer of Vertical Pre-mixer for powder coating tells you that the pulverized powder particles are sent into cyclone separation or rotating drum by wind force to achieve classification and finally collect the products.
In the crushing operation, it should be noted that the feeding speed and the temperature rise in the machine will affect the output. In general, the temperature rises quickly at the beginning. If the feeding speed is controlled, the growth will be slow in the future, and gradually It tends to be stable, and if the air temperature in the machine does not exceed 40 °C, it can be continuously produced.
Vertical Pre-mixer for powder coating manufacturers tell you to take intermittent sampling during production to check the particle size and particle size distribution of the product, find the cause after a problem occurs, and take timely measures to ensure the high quality of the product and prevent the leakage of the screen or the For other reasons, the difference in granularity is caused.
5. Screening and packing finished products
Vertical Pre-mixer for powder coating manufacturers tell you to use a side filter or use a cyclone separator with a side filter to collect fine powder from the air classification outlet. Finally, the qualified finished products are packaged.

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