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Key Points for Daily Maintenance and Upkeep of Plastic Granulators

Time：

2017-08-26

Key points for daily maintenance and upkeep of a plastic pelletizing machine: 1. Regularly inspect the quality of raw materials; ensure no foreign matter—such as sand particles or metal powder—enters the material or the barrel. 2. At least once or twice per shift, check all lubrication points and replenish with sufficient lubricant; bearing temperatures should not exceed 50°C during operation. 3. Before starting production, allow adequate heating and temperature stabilization time for both the barrel and the molding die; never begin production at temperatures below the material’s plasticization point. 4. Start the screw at low speed, and only after it has run at low speed for a specified period may the screw speed be gradually increased. 5. The screw’s no‑load running time inside the barrel must not…

Key Points for Daily Maintenance and Upkeep of Plastic Granulators

1. Regularly inspect the quality of raw materials used in production, ensuring that no foreign matter—such as sand particles or metal powder—is allowed to contaminate the material and enter the barrel.

2. During each shift, inspect all lubrication points at least 1–2 times and replenish with sufficient lubricant; the operating temperature of bearing components should not exceed 50°C.

3. Prior to feeding material into the production process, the barrel and the molding die must be held at a constant temperature for a period no shorter than the specified heating time; feeding material and commencing production at temperatures below the material’s plasticization temperature is prohibited.

4. The screw shall be started at low speed, and its rotational speed may only be gradually increased after it has operated at low speed for a specified period.

5. The screw’s no-load running time inside the barrel shall not exceed 2–3 minutes.

6. During operation, the plastic pelletizing machine should be regularly monitored for changes in the main motor’s current. If the motor is found to be running under heavy load for an extended period, it must be stopped immediately to identify the cause of the fault; production may resume only after the issue has been resolved.

7. After the barrel has been heated and brought to a constant temperature for the first time, tighten the mounting bolts that secure the barrel to the machine base once.

8. Before installing the screw and the mold, thoroughly clean all mating surfaces. Apply a layer of molybdenum disulfide or silicone oil to the fastening bolts to facilitate disassembly under high-temperature conditions. When assembling or disassembling components, do not strike their working surfaces with a heavy hammer; if necessary, place a hardwood block underneath and use a hand hammer to tap the hardwood for component removal.

9. When removing residual material from the barrel, screw, and mold, only bamboo or copper tools may be used to scrape off the adhering material; steel tools are prohibited. Furthermore, burning the residue on the screw with an open flame is not permitted.