6
Applicators
P/N 317091G
E
2011 Nordson Corporation
EP11 / EP 12
Description of Components / Functioning
(contd.)
Material Flow
The melter pumps the material through a heated hose to the applicator. In the
applicator the material flows through the filter cartridge(s) and the material
channels to the nozzle. Control modules open and close the material supply
to the nozzle. The nozzle applies the material to the substrate in a contact
coating process.
The application pattern is determined by grooves in the mouthpiece or by a
shim plate. The shim plate is located between the nozzle mouthpiece and the
mouthpiece receptacle. The application pattern also depends on the speed
at which the substrate moves, the quantity of material and the material
temperature.
In addition, the quality of the application is influenced by the distance and the
angle between the nozzle and the substrate.
Nozzle
The applicator nozzle touches the substrate, causing it to naturally wear. It
may need to be refaced. Refer to section
Maintenance
.
Shim Plates
A specific application pattern is achieved by inserting shim plates of certain
sizes and designs between the mouthpiece and the mouthpiece receptacle.
Fig. 4
Special Aspect of the EP 12
The V design of the EP 12 allows two control modules to be assigned for
each application zone. The material paths are the same length. The control
modules perform alternating applications, meaning that extremely brief
pauses between applications are possible.
