150 extended-length plastic extruder

Equipment Installation This equipment can be installed on a pre-cast concrete foundation or placed directly on a flat, level surface. The entire unit is equipped with vibration-damping feet. During installation, ensure proper layout and leave adequate operating space. Equipment Operating Instructions Before conducting a trial run, carefully inspect the following items: 1. Verify that the site’s power supply parameters match those specified in this manual and confirm that all electrical components are correctly connected. 2. Check all connections for looseness; if any are loose, tighten them promptly. 3. Confirm that the gearbox contains the correct type of lubricant and that the oil level is sufficient. Use medium‑pressure gear oil N151 or another gear oil of similar viscosity. The oil level should reach the upper mark on the gearbox oil dipstick. 4. Manually rotate the coupling connecting the main motor to the gearbox in a clockwise direction for at least two full revolutions, ensuring smooth and flexible operation. 5. Verify that the main motor rotates in the correct direction: when viewed from the head end, it should turn clockwise. After completing these checks, proceed with the host machine’s trial run according to the following steps: 1. Increase the host temperature to a level appropriate for the specific material being processed; users may set this value independently. Once the desired temperature is reached, maintain it for 0.5–1 hour. Monitor the temperature control system throughout the heating process to ensure proper functioning. 2. Inspect the cooling water system to confirm it is operating normally and check for leaks; address any issues immediately. 3. After completing the above steps, begin rotating the screw. Do not feed material initially; gradually increase the screw speed to approximately 41 rpm and run the machine idling for about 4–5 minutes. Observe whether the equipment operates smoothly. If any abnormalities occur, stop the machine, troubleshoot the issue, and then restart. 4. Gradually increase both the screw speed and the feed rate until the desired production output is achieved. Maintenance Instructions I. Main Motor 1. The deviation between the actual supply voltage and the rated value should not exceed 5%; similarly, the deviation in supply frequency should not exceed 1%. 2. Replace the motor’s grease every 4,000 hours of operation using No. 3 base grease. If the motor remains idle for an extended period, inspect the bearings for grease before reuse and replenish as necessary, filling the bearing housing to approximately two-thirds of its capacity. 3. During operation, if bearing temperatures become excessively high or the grease deteriorates, replace the grease promptly. Normal operating temperatures for bearings should not exceed 95°C. 4. Store the motor in a clean, cool, and dry environment when not in use. 5. Before reusing a long‑idle motor, measure its insulation resistance; it must be no less than 0.5 MΩ. If the reading falls below this threshold, perform drying treatment, ensuring the winding temperature does not exceed 121°C. II. Gearbox 1. Prior to use, fill the gearbox with lubricant—medium‑pressure gear oil or another gear oil of similar viscosity—until the oil level reaches the marked level on the dipstick. Note: Never operate the gearbox without adequate lubrication. 2. Maintain the gearbox within an ambient temperature range of 1–35°C. If the temperature exceeds this range, install a heating or cooling device as needed. 3. After 300–600 hours of operation, change the lubricant; thereafter, replace it every 4,000 hours. Perform this replacement while the gearbox is stopped and still warm; drain the old lubricant, flush the gearbox thoroughly with fresh lubricant of the same grade, and then refill with the prescribed amount of new lubricant. 4. If the gearbox has been idle for an extended period, run it empty for a short time before loading material to ensure adequate lubrication of the bearings. Regularly inspect all connections and monitor gear wear, addressing any issues promptly. 5. During operation, if abnormal noise, vibration, or overheating occurs, stop the machine immediately, investigate the cause, and resolve the problem before resuming use. III. Screw Removal Instructions 1. Before removing the screw, first dismantle the extruder head and ensure sufficient working space. Drain as much material as possible from the screw prior to disassembly. 2. Perform screw removal only when the host machine is maintained at its normal operating temperature. Take appropriate precautions to protect personnel from burns, and handle the screw carefully to avoid damage.