Workpiece: Φ 159- Φ 219 × 12m steel pipe
Coating requirements: epoxy powder coating 300-400um
Process line speed: 2m/ min
Main equipment introduction
1. 1 set of internal derusting production line
The equipment consists of belt sanding machine , steel sand recycling box and air intake system, transfer trolley, high pressure blasting tank and walking trolley, spray gun, hoist and sand storage tank.
Process introduction: Put the pipe on the turret trolley, let the trolley send the pipe head at one end into the steel sand recycling bin; start the blasting tank trolley, insert the lance head into the pipe, open the turret car to rotate the steel pipe, start the steel blasting Sand, spray to the other end, close the gun sanding valve. The blasting tank car retreats, allowing the compressed air to be purged inside the tube, and the steel sand is replenished by the sand storage tank to complete the whole process (the blasting speed is determined according to the diameter of the steel pipe). After the sprayed steel sand is recovered by the recovery tank, it will automatically flow to the belt sander and be transported by the belt to the other end of the hoist and lifted to the sand storage tank.
2. Powder coating equipment:
In the spraying operation, after the upper part of the workpiece, the inner spray gun is inserted into the steel pipe until the inlet position of the spray chamber, and the inclined wheel rotates to rotate the workpiece and advance horizontally. After the medium frequency is heated to 200 ° C and reaches the position of the spray chamber, the inner spray gun starts to work on the workpiece. Spraying is performed to solidify the powder using the heat of the workpiece. When the workpiece exits the spray chamber for about 1.5-2 minutes, it enters the shower cooling station. After cooling, it passes through the inclined wheel and is transferred to the lower part of the lower platform. After the workpiece is sprayed, the inner spray gun retreats by about 14m , and the upper part repeats the work.
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