WIR OHP 400 with Overhead Web Path
Web Inspection and Rewinding Machine
The Web Inspection Rewinder WIR OHP 400 is an extension of the basic WIR 300 and features free standing unwind and rewind sections and an overhead path.
Like the WIR 300, the WIR OHP 400 serves as a filter between the Printing and Lamination processes. The output of the Printing Machine is screened for printing defects such as mis-register, blade lines, shade variations etc. by means of a full width stroboscope provided as standard equipment. On request, a web video or a 100% defect detection system can be provided instead for more effective inspection.
The defective material thus identified is removed by cut and paste operations and only good copy is rewound to provide 100% defect free reels for downstream processes starting with lamination.
Another possibility is to edit a printed reel previously inspected and marked for removal on a printing machine equipped with an online 100% defect detection system.
Either way, the process not only ensures that there is no value addition on bad copy but also increases the plant productivity by making it possible to use its Lamination and Slitting facilities to their full potential without interruption.
Besides the primary function of Inspection, the machine is packed with features for a variety of converting applications with include :
- Correcting the edge of a badly rewound reel
- Removal of edge trim
- Rewinding a reel at higher or lower tension more suited to downstream processes
- Resizing (reducing or increasing) the real diameter
- Re-spooling (rewinding the reel on a different size core)
The WIR OHP 400 can handle Flexible packaging substrates in their plain / printed / coated / co-extruded and laminated combinations of base materials such as paper (including label stock), plastic films such as OPP, PET, CPP, PVC, POF and aluminum foil.
Besides the standard features associated with the WIR 300, the specific benefits associated with the WIR OHP 400 include:
- Possibility of bigger diameters on the unwind and rewind.
- The overhead path between the unwind and rewind sections as also the location of various groups such as the edge guide, splice table (optional) and trim removal/ trim extraction unit (optional) allow excellent access for operation / and web threading.
- Conveniently located inspection station between the unwind and rewind sections.
- Ultrasonic edge guide with a motorised actuator for the unwind reel.
- A Nip unit between the unwind and rewind sections to isolate the tensions at the unwind and rewind zones.
- Automatic unwind tension control through air brake and load cells .
- Automatic rewind tension control through an encoder based vector drive and load cells
- Speeds of upto 400 m/ min.
Technical Data
Specifications |
WIR OHP 400 |
|---|---|
 |
|
| Maximum web width (mm) | 1300/ 1600/ 2000 |
| Maximum unwind diameter (mm) | 1000 |
| Maximum unwind weight (kg) | 900* |
| Maximum rewind diameter (mm) | 1000 |
| Maximum rewind weight (kg) | 900* |
| Unwind core inner diameter (mm) | 76 and 152 |
| Rewind core inner diameter (mm) | 76 and 152 |
| Machine speed (m/ min) | 400 |
| * For a 1300 mm web width machine | |
| Standard Features | |
| Shaftless unwind and rewind sections suitable for 76 mm and 152 mm core ID | |
| Full width stroboscope for inspection conveniently located between the unwind and rewind sections | |
| Parallel controls for main operator functions at the inspection area and rewind end | |
| Ultrasonic edge guide with motorised actuator | |
| Possibility to unwind/rewind in either direction | |
| Automatic unwind tension control through air brake and load cells | |
| 2 motor AC Vector drive technology with instant stop for cut and paste operations | |
| Pneumatically pressured lay on-rolls for consistent Rewind reel density | |
| Speeds of upto 400 m/ min. | |
| Specific benefits over the WIR 300 | |
| Possibility of bigger diameters on the unwind and rewind | |
| The overhead path between the unwind and rewind sections as also the location of various groups such as the edge guide, splice table (optional) and trim removal/ trim extraction unit (optional) allow excellent visibility and access for operation / and web threading | |
| A Nip unit between the unwind and rewind sections to isolate the tensions at the unwind and rewind zones. Making the machine more suited to delicate substrates such as PE | |
| Automatic rewind tension control through an encoder based vector drive and load cells | |
| Possibility of optional features | |
| Floor lift mechanism for shaftless unwind roll | |
| Splice table | |
| Razor blade cutting and trim extraction | |
| Auxiliary rewind station for waste material | |
| Static elimination equipment | |
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