A PP hollow board production line typically comprises the following key components:
- Raw material system: Vacuum feeder and dryer;
- Extrusion system: Single-screw or twin-screw extruder (models SJ120/SJ150,55–132kW capacity);
- Filtration system: Hydraulic rapid mesh replacement device (ensuring melt purity);
- Forming system: T-shaped die head + vacuum setting platform (with independent temperature control and vacuum zoning);
- Traction system: Multiple servo-driven rubber rollers (first traction for stable extrusion, second traction for stress relief);
- Post-processing system: Annealing furnace, corona treatment machine (improving printing compatibility), cooling rack, automatic length-cutting machine, and stacker.
Brief production process
PP pellets → Drying → Extrusion and plasticizing → Filtration → T-head extrusion → Vacuum shaping → Traction → Annealing → Surface treatment → Cooling → Cutting → Stacking
