Dual Unwind Servo Sheeter

‍

The system unwinds, cuts, stacks and conveys material rolls for further manufacturing. Key functions include:

• Unwinding: Two side-shifting unwinds with driven airshafts and safety chucks secure and rotate material rolls using compressed air (90 psi). The airshafts, fitted into safety chucks, work with the sheeter’s nip set to feed material, controlled by a sensor monitoring the accumulator’s moving roller.
• Accumulating: Accumulators store material for consistent supply during increments, moving vertically and controlled via an HMI with position sensors. These     ensure the unwind feeds material at an average rate, maintaining readiness for sheeting.
• Sheeting: The sheeter increments and cuts material. Material passes over idler rollers into a nip set, driven by a servo motor with an encoder for precise control of increment length, speed and acceleration. A pneumatically actuated top roller ensures torque transfer. A dancer maintains web tension by moving along an arc, storing extra material. After incrementing, a pneumatic clamp secures the web, and a cutter (driven by a belt, gearbox, and posidyne) severs it with a single     crankshaft revolution, moving the upper blade past the lower blade.
• Stacking and Conveying: The cut material is stacked and temporarily stored on a conveyor assembly before being unloaded for the next manufacturing process.

‍

Specifications: (as pictured)

· VFD driven unwind at 8,800 lbs max.

· Roll diameter sensor to set output speed based on current roll diameter.

· Fixed gap shear welded cutter assembly

· Sheet metal shear style blade

· Linear guided system for accurate blade gap

· Direct driven rollers to prevent backlash

· Neoprene coated rollers, nip roller air biased

· AB servo drive & servo motor increment  

· Encoder is internal in the motors and does not travel on the web

· Score slitter (includes 4 ea slitters) option for dual chamber  see options portion of this quote

· Single servo gripper stacker

· Stacker tolerance single land +/- .25”

· Allen Bradley Compact Logix with color HMI

· Servo system, Kinetix AB

· Holds recipes for repeat jobs  with warning and error signals built into the system

· Electrical 480 Volts  60 Cycles  3 Phase  

· Sample speed at 48” increment 15-18 ppm  

· Tolerance repeatability: +/- .0625 sheet to sheet measurement

· Linear Web guide system.  +/- 4” stroke from center/home position

*Full customization available