High-Speed Underfeed Rewinder for Kraft Paper Mill
The high-speed underfeed rewinder is specifically engineered for processing heavyweight paper and board grades with basis weights ranging from medium to heavy-duty packaging grades. This paper mill machine features an innovative underfeed paper feeding system that ensures stable web transport and eliminates telescoping during high-speed rewinding. The high-speed underfeed rewinder incorporates a robust dual-support roller arrangement driven by a heavy-duty motor through a double-drive reducer, delivering smooth acceleration across a wide operating range.
A pneumatic braking system on the unwind stand maintains constant web tension throughout the roll diameter change, preventing wrinkles and breaks. The high-speed underfeed rewinder also includes a precision slitting section with pneumatic upper circular knives and a hardened bottom blade roll, allowing clean, burr-free cuts for packaging grades such as kraft liner, board, and corrugated medium. Hydraulic control of the nip load and a paper pushing device enable fully automated roll ejection, reducing cycle time. With its rigid frame construction designed for vibration resistance, this high-speed underfeed rewinder ensures years of reliable service in demanding mill environments.
Technical Data – High-Speed Underfeed Rewinder
| Parameter | Value |
|---|---|
| Paper Grades | Kraft, board, corrugated medium |
| Basis Weight Range | 200 – 600 g/m² |
| Net Paper Width | 2200 mm |
| Original Roll Diameter | 2000 mm |
| Finished Roll Diameter Max | 1500 mm |
| Design Speed | 500 m/min |
| Working Speed | 600 m/min |
| Feed Speed | 25 m/min |
| Support Roll Diameter | 500 mm |
| Core Diameter | 76 mm |
| Slitting Method | Pneumatic upper knives + bottom blade roll |
| Main Drive Motor | 45 kW / 4-pole |
| Paper Feed Type | Underfeed |
| Track Gauge | 3340 mm |
| Dynamic Balance Standard | G2.5 |
Leizhan supplies the complete high-speed underfeed rewinder as a key component of your paper finishing line. Our high-speed underfeed rewinder integrates advanced tension control, precision slitting, and hydraulic automation to maximize throughput and minimize waste. Whether you produce kraft liner, heavy board, or corrugating medium, Leizhan engineers a high-speed underfeed rewinder tailored to your roll diameter and speed requirements. For a custom quotation and technical consultation, please contact us at leizhanworld@gmail.com.
