Versatility is key to two slot die fluid coating systems from Nordson for adhesive application
Two slot coating systems from Nordson Corporation and its recently acquired Nordson EDI business provide versatility in adhesive application. Both will be highlighted at ICE Europe 2013 in Hall A5 at adjacent Stands 926 and 1026.
Complete Slot Coating Stations
Combining versatility and repeatability, slot die coating stations developed by the Premier Coating Division of Nordson EDI come complete with coating head, die support, fluid delivery unit, and coating rolls and can be deployed as modular or permanent components of coating lines.
Custom-built to accommodate a wide range of die sizes, the Premier™ coating station can incorporate either a flexible- or a fixed-lip coating head. Precision engineering and heavy-duty stainless steel construction contribute to the high degree of accuracy and repeatability achieved by the coating station. As an example of the system’s repeatability, the positioning of the die relative to the coating roll is held within a range of only 2.5 microns.
Nordson EDI can build the coating station for installation in either new or existing coating lines. A modular version of the station can be moved on- and off-line. Modular coating stations provide versatility and help reduce downtime for die maintenance or job changes. Some of Nordson EDI’s customers use the movable station to alternate between slot die and conventional roll coating, while others switch among several coating stations, each with a different slot die.
The coating station is designed to accommodate supported-web and unsupported-web configurations. Four axes of die adjustment are available. Coating rolls may be either stainless steel or chrome-plated. The station can include a built-in vacuum box to help control the coating bead.
The Premier coating station makes it possible for more converters to obtain the advantages of slot die coating over roll coating. As a completely enclosed, pre-metered system, slot die coating is more efficient and controllable than roll coating. And while roll coating and other open systems actually apply to the substrate only part of the coating material delivered to them and re-circulate the rest, slot die coating prevents this exposure to the environment, eliminating workplace emissions and contamination.
An extensively equipped Coating Center at the Premier Coating Division facility in Wisconsin is available to companies interested in trial runs of a wide range of slot die coating processes. Information can be obtained by visiting www.premierdies.com and clicking on “Coating Trials.”
Slot applicator for hot melt applications
The TrueCoat® TCHP applicator from Nordson Corp.’s Web Coating Systems Group provides exceptional accuracy for stripe or full coating application in continuous web processes. Use of a rotating bar in full coating applications makes possible streak-free coverage and excellent edge control, making the TCHP particularly beneficial for tape and label applications. The compact, configurable design is ideal for coating a wide variety of substrates including papers, foils, films, and nonwovens.
The TrueCoat TCHP applicator is simple to use. A V-shaped body design provides flexible setup of web routing and guidance. Fast pattern changes are achieved with quick-change, replaceable slot nozzles. There are two nozzles. As one is running in the machine, the other can be prepared with a shim plate, which defines the coating pattern. For larger application widths, a trolley facilitates the nozzle change. The net changeover time is within several minutes, meeting the demand for lean production and increased productivity. The flexibility and functionality of the TCHP slot applicator is expanded with capability to quickly, easily change between traditional slot nozzle and rotating bar nozzle technologies. This versatility reduces investment cost.
TrueCoat slot applicators are easy to maintain, featuring quick-change filters and modules as well as flange-on solenoids for dies up to 500 mm in coating width. For wider dies or for high-throughput applications, the flange-on solenoids are replaced by throttle screws, and larger filters replace the quick-change types. Optional anti-stick surface coating eases cleaning.