Views: 600 Author: Site Editor Publish Time: 2019-11-04 Origin: Site
Lug Arrangement: Describes independent lug units evenly distributed on the shaft, which extend radially synchronously after inflation.• Expansion Locking Mechanism: The lugs fit tightly against the inner wall of the reel during inflation and retract automatically after deflation, enabling quick replacement without tools.• Material Selection: Lugs are commonly made of alloy steel (high strength) or polyurethane/rubber (anti-slip, protects the inner wall of paper cores); the shaft is fabricated from seamless steel tubes to guarantee dynamic balance.
High-Precision Centering
◦ The lug expands evenly to ensure the coil is concentric with the shaft, reduce runout during operation, and improve winding/unwinding quality.
◦ Suitable for high-speed printing, coating and laminating equipment with stringent requirements.
Efficient Rapid Coil Change
◦ Locking and releasing can be completed within seconds only by inflating and deflating compressed air (0.4-0.8 MPa), which greatly cuts downtime.
◦ Ideal for production lines requiring frequent replacement of coils of various specifications (such as packaging, film and paper industries).
Heavy Load Capacity
◦ The lug features a large contact area and numerous distribution points, capable of supporting heavy-duty coils (e.g., metal foil, thick cardboard, non-woven fabrics).
◦ Especially applicable to scenarios with wide-width or large-diameter winding cores.
Compatibility with Multiple Winding Core Materials
◦ Compatible with paper tubes, plastic tubes, steel cores and other cores with varying inner diameters and hardness levels. Custom surface treatments (such as knurling and rubber coating) are available for the lug to boost friction or protect soft winding cores.
Comparison with key-type air expanding shafts: The lug type is more suitable for paper tubes with smooth inner walls or thin walls and will not leave indentations like the key type; the key type may perform better under extremely heavy load conditions.
• Comparison with slat-type air expanding shafts: The lug type features a simpler structure and lower cost, and it has good adaptability to small and medium-sized rolls.
