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UV COATING - PATTERN (FIXED LOCATION) | UV COATING - PATTERN (PORTABLE)
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Global Web Finishing is pleased to announce our sales support for Worldwide Graphics Corporation UV pattern coaters. WWG has a long standing reputation for building the industries benchmark product for more than 25 years.
WWG UV coating towers are installed post chills and prior to the press folder or sheeter. Typically UV coaters will produce high gloss, high quality, UV cured varnish to web fed magazine and catalog covers for high speed applications.
Similar to GWF gluers, WWG UV coaters print from “flexo pad” cylinder arrangements. The WWG coater is comprised of three main sections: coating, curing, and chills. |
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The WWG coating section uses a closed chamber doctor blade cavity to deliver coating material to an anilox engraved transfer cylinder. A magnetic cylinder carries a metal backed photochemically engraved “flexo pad” blanket which can be etched for any repeat pattern to offer images registered to match specific print images.
Immediately following coating, the web enters the curing section. High efficiency UV lamps in sequence, typically using 2 to 4 lamps depending upon speed, cure the coating through UV light wave lengths. The lamp sections are purpose designed, with refined air cooling systems and all necessary safety features. The curing section is a fixed location part of the integrity and support structure of the entire unit.
After curing section exit, the web enters the variable speed chill drum section of the machine. Typically two large diameter water cooled drums will set the coating, remove excess heat from the web, and position the web in a tension ready situation for the press delivery. |
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Standard features for the WWG UV coater (fixed location) include:
- 3” (76.2 mm) solid steel nickel plated side frames
- Single around magnetic plate cylinder with ceramic magnets and stainless steel inserts
- Magnetic plate cylinder designed for .067” cyrel type flexo pad with steel backing
- ± .375” (.750"/19mm total) motorized sidelay of plate cylinder
- Oversized diameter anilox engraved transfer cylinder eliminates repeating
- Anilox engraved transfer cylinder is lightweight carbon fiber construction and ceramic coated with laser engraving
- Machine side frames are slotted for fast removal and change out of the anilox transfer cylinder
- Anilox engraved transfer cylinder is oversized to plate cylinder for high-speed production and eliminate material starvation
- Retroflex closed chamber doctor blade w/wash up system
- Extra large diameter solid steel impression cylinder for print stability
- On/off - impression from either "manual" or "auto" speed interlock modes
- Independent parallel impression adjustment of plate and impression cylinders
- Emerson-CT independent drive system for coating cylinders with 360° advance/retard registration control
- Integrated cut off control built-in with scanner head and mounting bar
- Dual diaphragm pump for material supply and return from remote location
- Central grease lubrication pump system for bearings, eccentrics and sidelays
- (2) - 40” (1016mm) circumference chill rolls with spiral inserts
- Emerson-CT independent drive system for chill roll section with variable speed for web tension control
- HMI touch screen panel controls for drive, tension, registration and curing
- (2) integrated web break detector and severing devices
- (2) press control stations
- Built to conformance with CE regulation
- Symbology for panel and control functions
- GEW 2-lamp high efficiency "isocure" UV curing system rated for 45,000 iph
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While the WWG fixed position UV coating tower and the GWF portable UV coater share the same basic cylinder design elements, these units are quite different in application and production opportunity.
As the WWG tower focuses on high speed and volume of repeatable coating applications, the GWF portable UV coater is designed to fit into multiple locations in or around web inline and offline finishing systems.
GWF portable UV coaters can be positioned to print high quality UV Cured coatings in a variety of situations and coating materials. Portable UV Lamp sections are used to cure coatings such as hi gloss and matte finishes, silicone based release coatings, scratch off coatings, and an ever increasing variety of other highly value added coatings.
Common inline and offline web finished formats using GWFportable UV coaters include stamps, stickers and labels, high quality multi-ply paper cards, etc. These machines can be arranged in tandem for two sided “perfecting” or consecutive “double hit” applications as well.
The primary drawback in comparison to the fixed position coating tower is speed, which is generally limited to 1000fpm (300meters/min). That is likely acceptable, since the majority of users include variable data inkjet in these web finishing applications.
GWF is however always ready to customize our designs (speed or otherwise), to fit your production situations.
Standard features for the GWF (portable) UV coater include:
- Double circumference design based on speed requirements and machine width
- Custom design for bottom or top side print
- Ceramic coated laser anilox engraved transfer cylinder and reverse angle “doctor” blade for non-adhesive coating applications
- Quick change transfer cylinder for coating or adhesive make ready
- Segmented pan/metering roll/transfer cylinder designs for specialized material application requirements
- Double + circumference transfer cylinder design for high speed yet single around applications
- Magnetic plate cylinder for “flexo pad” cylinder plate lockup
- Reel rod in impression cylinder for “anti-offset” blanket lockup
- Water cooled transfer and/or metering roller
- Automatic grease lubrication pump
- Level sensor system for material supply to fountain pan
- Viscosity monitor for automatic material viscosity adjustment
Options for the GWF (portable) UV coater can include:
- Layout and design for bottom or top side print
- Ceramic coated laser anilox engraved transfer cylinder and reverse angle “doctor” blade for non-adhesive coating applications
- Quick change transfer cylinder for coating or adhesive make ready
- Segmented pan/metering roll/transfer cylinder designs for specialized material application requirements
- Magnetic plate cylinder for “flexo pad” cylinder plate lockup
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