Many small and medium factory owners prefer second-hand HDPE pipe extrusion lines for their cost-effective investment. However, most used equipment has minor wear and aging problems. Simple and regular daily maintenance can effectively reduce downtime, stabilize pipe production quality and extend the machine's service life.
一,Daily, Weekly & Monthly Maintenance Checklist
| Maintenance Cycle | Key Equipment Parts | Main Maintenance Work | Target Problems on Second-hand Lines |
|---|---|---|---|
| Daily Maintenance | Extruder screw & barrel, water cooling system, haul-off machine, cutting unit | 1. Check barrel temperature display, ensure normal heating2. Clean residual HDPE material on die head surface3. Inspect cooling water flow, clear blocked pipelines4. Check haul-off rubber pads for abrasion | Material carbonization, uneven pipe wall, insufficient cooling |
| Weekly Maintenance | Gearbox, vacuum tank, hydraulic system, motor fan | 1. Check gearbox oil level and oil quality2. Clean vacuum tank impurities, test vacuum degree3. Check hydraulic pipeline for oil leakage4. Remove dust from driving motors | Vacuum instability, oil leakage, motor overheating |
| Monthly Maintenance | Die, bearing set, control cabinet, cutter blade | 1. Disassemble and clean HDPE pipe die thoroughly2. Add lubricating grease to all bearings3. Clean dust inside electrical control cabinet4. Polish or replace worn cutting blades | Poor pipe roundness, unstable extrusion, electrical short circuit risk |
二, Key Practical Maintenance Tips
1. Screw & Barrel Maintenance
Second-hand extruder screws and barrels have certain wear. Do not run the machine at high temperature for a long time. Before shutdown, stop feeding materials to prevent HDPE material carbonization inside the barrel. Never use hard tools to clean carbon deposits, which will scratch the screw and shorten machine life.
2. Vacuum & Cooling System Care
Old extrusion lines are easy to have scale and dirt in cooling pipes. Regularly drain sewage and clean the vacuum tank. Keep stable vacuum degree and water pressure during production, which is the key to guarantee smooth and round HDPE pipes.
3. Lubrication & Transmission System
Most equipment abnormal noise and jamming problems are caused by poor lubrication. Replace aging gear oil on schedule and add qualified grease for bearings. Good lubrication can greatly slow down the aging of second-hand machines.
4. Electric System Protection
The electric parts of used machines are easy to age. Keep the control cabinet dry and dust-free. Check loose wires regularly and avoid long-time overload operation to prevent sudden shutdown.
三, Common Maintenance Mistakes to Avoid
- Only repair equipment after breakdown, ignore daily regular maintenance
- Use inferior lubricating oil to save costs, causing severe part wear
- Overload continuous operation, accelerating machine aging
- Randomly adjust temperature and vacuum parameters without guidance
Qingdao Confortune Machinery Co., Ltd. provides high-quality new and second-hand HDPE pipe extrusion lines, as well as professional operation guidance and after-sales maintenance services for global customers. Feel free to contact us for any machine operation and maintenance problems!
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