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The manufacturer of Conical Twin Screw and Barrel will show you how to maintain the twin screw extruder
The manufacturer of Conical Twin Screw and Barrel tells you that in order to produce high-quality products, the twin-screw extruder must first be operated strictly in accordance with the operating procedures, and the extruder must be maintained and maintained frequently.
1. Preparation before driving
The manufacturer of Conical Twin Screw and Barrel tells you that for the intermeshing co-rotating twin screw extruder, you should check whether the screw combination is correct before driving. After the screw is installed, turn the screw slowly to make the two screws rotate. If it is easy, it means the combination is correct. If it is difficult or the plate does not move, it should be removed and reassembled.
For intermeshing early twin-screw extruders, be careful not to mistake the positions of the two screws when installing the screws. If the material is piled up at the feeding port and not conveyed forward after driving and adding materials, the screw head will press on the machine head and the current will increase. If this happens, stop immediately, remove the machine head, and reload it in the correct position. .
The supplier of Conical Twin Screw and Barrel tells you to check whether the wiring of each part of the machine is correct before driving; whether the cooling system of the barrel screw is normal and unblocked; whether the driving system is normal, whether the lubricating oil level is normal, whether the oil circuit is unblocked; metering and feeding , Whether the exhaust system is normal; whether the connecting bolts of the machine head are tightened, etc.
The manufacturer of Conical Twin Screw and Barrel tells you to heat the parts of the extruder that need to be heated before driving, and at the same time pass a cooling medium into the bottom of the hopper and the cooling part of the screw for cooling. When the set temperature is reached, the temperature should be kept for 10 minutes to make the temperature of the screw and barrel uniform.
2. Points to note when driving and parking
The manufacturer of Conical Twin Screw and Barrel tells you that granular materials should be metered and fed to prevent overload; for powder materials, overflow feeding can be used, and pay close attention to whether it is overloaded. When driving, add a small amount of material first and keep the feeding balance. At this time, pay close attention to the pointer of the torque meter. The main screw speed should rotate at a low speed. After the material is extruded from the die and led to the traction equipment, slowly increase the screw speed, and then increase the feeding amount until it reaches the set value.
Stop feeding before stopping, the screw of the main engine runs at low speed, and the material in the screw is discharged cleanly. For the counter-rotating twin-screw, when no material is discharged from the standby head, remove the machine head, pull out the screw, clean the screw, machine head, and barrel while it is hot, then assemble and reset it, and use it next time. The supplier of Conical Twin Screw and Barrel tells you that if you use cleaning material, you do not need to pull out the screw for cleaning. For the same direction twin screw, if the screw needs to be recombined for the next extrusion, the components of the screw must be removed while it is hot, thoroughly cleaned, and then recombined according to the new screw configuration. The inner hole of the barrel and the nose should also be cleaned.
When cleaning the machine head or screw components, steel knives, copper brushes, paraffin wax, gauze, etc. should be used.
3. Repair and maintenance
Regular maintenance should be carried out according to the instructions attached to the extruder when it leaves the factory. The supplier of Conical Twin Screw and Barrel tells you that maintenance and maintenance should be carried out normally, if empty operation is not allowed, so as to avoid the screw and barrel wear; if the operation is not normal, stop immediately for inspection and repair; prevent metal or other debris from falling People inside the hopper. If a pressure sensor is installed at the machine head, it should be assembled and disassembled carefully. Don't knock or scrape the accumulation of material on the sensing part of the diaphragm with hard objects. Wear a protective cover when not in use.