BMW S4 - Black Magic Series

The BMW S4 is engineered to improve efficiencies for hand wrap and stretch film production. This winder is offered in two configurations; one with bleed trim (BT) for flexibility in winding roll sets and one with bleed trim less (BTL) for dedicated six up winding. The bleed trim less configuration reduces the cost of offline equipment and increases operations efficiency by up to 8 percent compared with conventional center support machines. This winder features an integrated automatic core and roll handling system and capabilities for producing six-up rolls on a 25-second cycle time, roll change to roll change. Based on upstream capabilities and 80 percent line uptime, the BMW S4 can produce up to 2,700 roll sets.

The BMW S4 is designed as a four spindle surface/center winder with center core shaft supports. This arrangement in conjunction with continuous, dual-surface-driven lay-on rolls enables production of "flat-tail" film rolls. Flat-tail rolls are wound from the top side of the web (the side against the chill roll) into the roll to produce inline-slit films that are virtually scrap-free from the core to the last wrap for both hand and machine wrap stretch films.

Highlights of the BMW S4:

• 10-inch diameter, 300 pound (136kg) capacity.
• Line speeds to 2,400 fpm (732 mpm) on three "shaft versions."
• Net finished web widths of (3.2 m or 10.5 ft.) 129 inches (3,277mm) for the bleed trim version or (3m or 9.8 ft.) 120 inches (3,048mm) for the bleed trim less version.
• Four spindle surface/center winder with center core shaft supports.
• Capability for producing "flat-tail" film rolls.
• Capability to run either 2-inch or 3-inch (50 or 75mm) cores.
• Includes tape-less automatic roll transfer system.
• AC vector digital drive system and PLC controls.
• Optional six individual BTL (Bleed-Trim-Less) web steering assemblies, one per lane, for inline slitting with core extensions without the need to pull bleed trims.