The I.E.S. DRS-4200 works like a "Shaft within a shaft". Winding cores are mechanically locked onto one or multiple friction rings, depending on core width. When the outer race is rotated against the inner race of the friction ring the expanding balls ride up cam ramps to center and grip the core. These friction rings then consistently slip like a clutch around a central shaft which is runs at an over speed RPM. Similar to a strip shaft, this central shaft contains air bladders and friction strips running along the shaft. Winding torque to the friction rings (and consequently the cores and rolls) is controlled by adjusting the air pressure to the bladders pressing out on the friction strip which exert force on the inner surface of the friction rings. In general, more winding torque is required as the rolls build and bladder air pressure increases. Because separate rolls require separate winding torques, some will slip more than others. Through this differential slipping, proper winding tension is maintained for each roll.
Ideal for difficult cores. Same operating principles as DRS-4200.
Large expansion range accommodates core ID variation; grips plastic and other slippery core surfaces. Wide gripping surfaces provide superior stability, elimating wobble or axial movement of cores on the shaft.
Ideal for difficult cores
Used for higher load capacities; cores slip on the outer shaft. Used for higher load capacities; cores slip on the outer shaft.
If you want to keep your side force DRS setup, but need a lighter shaft, our DRS-1000 is a simple light weight carbon fiber shaft with a groove for holding keyed rewind spacers.
DF-500 - A torque latching chuck that can slide over a DRS-1000 with alternating spacer rings . Positively locks cores in place and allows you to run side force DRS without generating cardboard dust or heat.
A torque latching chuck that can slide over a DRS-1000 with alternating spacer rings . Positively locks cores in place and allows you to run side force DRS without generating cardboard dust or heat.
All rolls of material have differences in material thickness and/or coating thickness across the width of the web. These thickness variations are present in each wrap of the roll. When a master unwind roll is slit and then re-wound, these thickness variations cause a different rewind torque requirement for each separate roll across the rewind shaft.
A "lock core" shaft can only transmit a single winding torque to all rolls, so some rolls may wind too loose and some too tight. This can cause many quality problems. Some are immediately noticeable rejects such as broken webs, roll telescoping, weaving, starring, and crushed wraps or even crushed cores. Other problems related to roll hardness are not as easily discovered when a wind is completed and can be passed along to subsequent unwind processes for other departments or even customers to discover.
Multiple external expansion elements grip the inside diameter of any core. Ideal for multiple slit rewind web processing applications.
Double E safety chucks make shaft loading simple. Flange or foot-mounted models available with turned square, square, circular, or triangular shaft engagements.
Air shafts are available in steel, aluminum, or lightweight carbon fiber; suitable for all types of winding applications.
Lightweight air bladder chucks mount on a core shaft to grip cores with various diameters. Connecting air hose allows two chucks to inflate simultaneously.