The plastic extruder shall be properly started to follow the following seven points:
1. Check the preheating temperature: open the front door of the control cabinet, close the main power switch, close the power switch of each section of electric heater, and set the parameters of each heating area according to the process requirements, and heat up.
2. Check the temperature control instrument and solenoid valve: wait for the relevant heating temperature to reach the set value, then maintain the temperature for 30~45 minutes, and carefully check the accuracy of the temperature control instruments and solenoid valves.
3, check the host idling: hand dish after dynamic elastic coupling and determined the normal can be ready to start the main motor, auxiliary closed the power switch, power switch and start button, host speed setting, and 1 ~ 2 minutes of host to idle, idle speed is not higher than 40 r/min.
4. Upper material: check the main engine idling without abnormality, start feeding machine button, adjust feeding speed setting, and start feeding as low as possible.After the material is discharged from the machine, the feed screw speed and main screw speed are raised slowly, and the feeding machine and the main engine speed are matched.
5. Proper operation of cooling system: the cylinder body is equipped with water circulation cooling system, which is to avoid the high shear mixing of materials.The cylinder body adopts the linkage control of the solenoid valve and the temperature control instrument.In the start-up stage, the cooling system is not required to be opened. After operation, the temperature rise of the main engine is observed, and the use of cooling system is determined according to the situation.
6. Start the vacuum pump properly: after the main engine enters the stable operation state, the vacuum pump will be activated (first, the water inlet valve of the vacuum pump will be opened, and the appropriate amount of water will be adjusted).When cleaning out the material that has already appeared in the exhaust chamber, it should be shut down before cleaning.
7. Base material: for materials with enhanced operation, the base material should be opened first. After the equipment is stable, it will gradually increase the number of glass fiber shares.