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The process of fluidized bed coating

  Fluidized bed coating equipment is a new type of particle coating equipment that organically combines fluidization coating technology and spray technology. It is widely used for film slow and controlled release, skeleton slow and controlled release capsules, pill coating, particle and powder coating.

So the cutting and spraying process is: pill making and coating

  The materials in the fluidized bed will roll in a regular spiral motion in the specially designed container under the pushing action of hot gas flow direction, the centrifugal action of the rotary table, the centripetal force action of the container wall, the airflow backflow action and the gravity action. Under the adhesive action of the atomized droplets sprayed along the tangential image, the pellet core will be formed, and the powder sprayed in the tangential direction will be coated to obtain the required pellets.

The top spraying process is: granulation

  The materials in the fluidized bed are in an upward fluidized state under the upward push of the hot air flow. Under the adhesion of atomized droplets from top to bottom, they gradually bond into particles, which are obtained after drying.

The bottom spraying process is: coating

  The materials in the fluidized bed move upward from the bottom of the guide tube under the action of the hot air flow direction, and then scatter and fall back through the top. The coating liquid is sprayed upwards by the atomizer located at the bottom of the flow tube, and coated on the materials flowing in the same direction, thus achieving the purpose of coating

The characteristics of fluidized bed coating are:

1. Bottom jet fluidization allows the material to have a certain regular operating trajectory, thus obtaining a uniform and continuous coating film.

2. Powder, particle, pill masking, moisture-proof, oxidation resistant, waterproof, heat resistant, coloring isolation and other coatings.

3. No loss of coating materials, low production cost.

4. The route of fog particles to materials is short, so there is no danger of "spray drying".

5. The cylindrical acceleration container or inverted cone deceleration design can be used for particle, large particle, small particle, and micro coating.

6. The material has excellent dispersibility and no adhesion.

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