Specifications
- Frame / Bed Width: ~10–12 in (based on photos, please confirm)
- Overall Length: ~30–36 in (estimate from photos, please confirm)
- Shaft Type: Double E style air / safety shafts (expandable type)
- Brake / Clutch Units: Electromagnetic disc brakes / clutches (slotted disc design)
- Gear Drive: Spur gear train in center (for synchronized motion)
- Pneumatic Cylinder: Bimba R-311-D-010-B, double-acting, 2.00 in bore × 1.00 in stroke
- Mounting: Nose mount (on the Bimba)
- Construction: Steel frame, cast/machined discs, aluminum/steel shafts
- Approximate Core Size: Likely standard plastic/film cores (e.g. 3 in, 6 in; to be measured)
- Material: Suitable for plastic film, sheet, paper webs, etc.
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Description
- Robust industrial rewind/unwind stand built for web handling applications in plastic extrusion, film converting, laminating, or paper processing lines.
- Includes electromagnetic brake/clutch modules on both ends, a central gear drive to synchronize motion, and air-expandable Double E shafts for secure engagement of roll cores.
- Equipped with a Bimba R-311-D-010-B double-acting pneumatic cylinder to actuate or assist part of the system’s mechanical operations.
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What It Does
- Controls tension of the web material by applying braking force during unwind or rewind.
- Synchronizes roll movement via gear coupling.
- Expands and locks cores using the Double E shaft mechanism to grip internal roll cores.
- Automates actuation using the pneumatics (via Bimba cylinder) for tasks like engaging brakes, shifting components, or lifting the web path.
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Capabilities
- Handles films, sheets, coated webs, or other continuous material rolls.
- Maintains consistent tension across the roll during high-speed operation.
- Engages/disengages roll cores automatically with minimal operator intervention.
- Adaptable to different roll widths and core diameters (within reasonable limits).
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Core Functions
- Brake Control — electromagnetic units regulate torque on the roll shaft.
- Shaft Expansion & Locking — Double E safety shaft grips cores from inside.
- Mechanical Synchronization — gear train ensures even rotation across both ends.
- Pneumatic Actuation — Bimba cylinder activates or assists one or more moving functions.
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Design Features & Benefits
- Electromagnetic disc brakes allow smooth, adjustable tension control.
- Double E expandable shafts provide fast, secure grip of roll cores.
- Central gear train helps distribute torque evenly, reducing shaft binding.
- Pneumatic actuation (via Bimba cylinder) allows rapid, automated engagement.
- Robust steel frame ensures alignment stability and vibration resistance.
- Modular components make maintenance and parts replacement easier.
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Applications & Industries
- Plastics Film & Sheet Extrusion — for rewinding extruded film.
- Converting & Laminating Lines — for unwind/rewind modules in laminators.
- Packaging & Flexible Packaging Plants.
- Printing & Coating Webs.
- Textiles or Nonwovens (if core-compatible).
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Machine Overview & Summary
- Heavy-duty rewind/unwind module designed for integration into continuous web processing lines, particularly in the plastics or converting industries.
- Includes electromagnetic disc brakes on both ends to precisely control roll tension, a central gear coupling for synchronized torque distribution, and air-expandable Double E shafts for secure core clamping.
- The Bimba R-311-D-010-B double-acting pneumatic cylinder allows automated or semi-automated actuation of functions like brake engagement or roll shifting, enhancing process reliability and reducing manual intervention.
- Well-suited for medium to heavy web-handling duties in extrusion, laminating, or converting plants.
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How the Bimba Cylinder Works with This Winder
The Bimba cylinder is part of the same system and works in tandem with the rewind/unwind stand.
Its double-acting design can apply force in both extension and retraction strokes.
Used to engage/disengage the electromagnetic brakes or clutches.
When a new roll is loaded, the cylinder might push a lever or brake arm into position; when tension is restored, it retracts.
It could also be used to lift or move a web-guiding arm or dancer roll, or shift the position of idler rollers.
Because of its short stroke (1.00 in), it’s designed for a smaller, controlled actuation — not a full roll movement but a cam or lever action.
In short: the Bimba cylinder functions as an actuator within the winder assembly, controlling a smaller mechanical movement (e.g. brake lever or taper arm) that supports the main web handling functions.