Analysis on daily maintenance of twin-screw extruder
After the co-rotating parallel twin-screw extruder is used for 500 hours, there will be iron filings or other impurities in the gear box, so the gear should be cleaned and the lubricant of the gear box should be replaced. In case of interruption of production, the main drive and heating will stop. When the power supply is restored, each section of the barrel must be reheated to the specified temperature and kept for a period of time before the extruder can be started. If the steering fullness of the instrument and pointer is found, check whether the contact between the thermocouple and other side lines is good. When opening the barrel cover or the exhaust cover, be careful to prevent foreign objects from falling into the host.
After the twin-screw extruder has been used for a period of time, a comprehensive inspection should be performed to check the tightness of all screws. No debris is allowed in the material, and hard objects such as metal and sand are strictly prohibited from entering the hopper and extruder. To have sufficient warm-up time, the manual cranking should be brisk before driving. Generally, it should be kept at a constant temperature for 2 hours after reaching the process set temperature. The screw is only allowed to start at low speed, and the idling time does not exceed 3 minutes.
The twin-screw extruder is developed on the basis of the single-screw extruder. Due to its good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and other characteristics, it has been widely used in extrusion products. forming process.
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