Key Points for Daily Maintenance and Upkeep of Plastic Granulators
Time：
2017-10-05
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. Each shift must inspect each lubrication point at least 1–2 times and replenish with sufficient lubricant; the temperature of bearing components during operation 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 range is prohibited.
4. The screw must be started at low speed, and only after running at low speed for a specified period may the screw speed be gradually increased.
5. The screw’s idle 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 overload conditions for an extended period (with brief overloads permitted), the machine must be stopped immediately, the cause of the fault identified, and production resumed only after the issue has been resolved.
7. After the barrel has been heated to a constant temperature for the first time, tighten the mounting bolts that secure the barrel to the machine base once more.
8. Before installing the screw and the mold, thoroughly clean all mating surfaces of the components. Apply a layer of molybdenum disulfide or silicone oil to the fastening bolts to facilitate disassembly under high-temperature conditions. When assembling or disassembling parts, do not strike their working surfaces with a heavy hammer; if necessary, use a hard pad.
Wood: Use a hand hammer to strike hardwood when dismantling parts.
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, and it is strictly forbidden to use flame‑heating methods to remove residue from the screw.
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Shuangda
Hebei Shuangda Rubber Machinery Co., Ltd.
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