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China's plastic-impregnated chain link fence, chain link fence technical process

Impregnation of the chain link fence is an anti-corrosion method.

 

The method is: powder dipping method.

It originated from the fluidized bed method. The so-called fluidized bed was first applied to the contact differentiation of petroleum in the Winkler gas explosion furnace, and then developed the solid-gas two-phase contact technology, which was gradually used in metal coating and plastic coating. So sometimes it is still called "fluidized bed coating method". The actual process is to put the powder coating into the porous and breathable container (flow tank) at the bottom, and send the compressed air through the treatment from the bottom by the blower, so that the powder coating can be turned to reach the "flow tank". status". Becomes a finely pided powder that is evenly distributed. the

 

Many people know that the fluidized bed is the second period of the solid fluid state. On the basis of the fixed bed, the flow rate (W) continues to increase, the bed layer begins to expand and loosen, the bed layer height begins to increase, and each powder particle is floated. Therefore, it moves away from its original position to a certain extent, and then enters the period of fluidized bed. Section bc shows that the powder layer in the fluidized bed expands, and its height (I) increases with the increase of gas velocity, but the pressure (△P) in the bed does not increase, and the flow velocity can be changed within a certain range without affecting the flow rate of the fluid. The required unit power is the characteristic of the fluidized bed, and it is precisely this characteristic that is used for the implementation of the coating technology.

The uniformity of the powder fluidization state in the fluidized bed is the key to ensure uniform coating. The fluidized bed used in powder coating belongs to "vertical fluidization". The fluidization number must be found out through experiments. Generally, it can be coated. The suspension rate of powder in the fluidized bed can reach up to 30-50 %. the

 

The dipping method is as follows: For example: the chain link fence is preheated to above the melting point of the powder coating by degreasing, and the plastic powder will evenly adhere after dipping into the fluidized bed, and then the plasticized polymer is cross-linked and leveled to form a steel-plastic composite product.

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