Buying a used PVC profile machine saves big investment, yet poor refurbishment or skipped inspection will lead to frequent downtime and unstable profile quality. Reliable suppliers carry out systematic refurbishment and multi-stage inspection before shipment.
Standard Refurbishment Steps for Used PVC Profile Machine
1. Full disassembly & deep cleaning Dismantle the extruder, vacuum calibrator, haul-off, cutter and auxiliary units. Remove residual PVC material, oil sludge, rust and dirt from all parts.
2. Core parts repair or replacement
- Screw & barrel: Measure wear. Repair worn flights by laser cladding or replace heavily damaged sets.
- Gearbox, bearings and seals: Change leaking oil seals, worn bearings, refill fresh lubrication oil.
- Heating & cooling system: Replace failed heater bands, thermocouples, clean cooling water channels.
- Electrical cabinet: Check contactors, inverters, PLC and wiring; replace aged cables and faulty sensors.
3. Assembly & alignment adjustment Reassemble the whole line, calibrate screw alignment, haul-off rollers, cutting unit and vacuum system to guarantee stable running.
4. Painting & cosmetic renewal Sandblast and repaint machine frame to prevent corrosion for long-time workshop use.
Critical Inspection Checklist Before Delivery
1. Mechanical inspection
- Check screw and barrel clearance, no deep scratches or corrosion
- Gearbox: No abnormal noise, no oil leakage
- Downstream equipment: Vacuum tank, haul-off, cutter, stacker work smoothly
- Frame without cracks or deformation
2. Electrical & temperature test
All temperature zones can heat evenly; thermocouples read accurately. Inverter, HMI and safety protection interlocks function normally.
3. Dry run test
Run the whole line without material for several hours. Monitor vibration, noise, motor temperature and pressure stability.
4. Material trial production test (most important)
Feed rigid PVC dry blend and extrude real profiles. Inspect profile dimension, surface smoothness and extrusion stability. Only qualified machines can be shipped.
Final Summary
Complete refurbishment plus strict multi-stage inspection is the guarantee for stable operation of used PVC profile machines. A fully refurbished second-hand line can produce qualified uPVC window profiles, skirting boards and decorative profiles with much lower cost than new equipment.
Contact us to get machine inspection videos, trial sample photos and technical documents of refurbished PVC profile extrusion machines.
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FAQ
Q: What is the difference between simple repaint and professional refurbishment?
A: Simple repaint only changes appearance. Professional refurbishment replaces worn core components and passes full functional & extrusion tests to guarantee stable production.
Q: Can refurbished used PVC profile machine make WPC profiles?
A: Yes, but we must inspect screw structure and complete extra material trial to confirm it fits WPC formula.