OPTEK DPL-24
6
PRINCIPLES OF OPERATION
The following is an explanation and diagram
of the operation of the DPL-24 differential pressure laminator.
When the DPL-24 is turned on, two proportional controllers independently
drive the top and bottom heaters to the heat the diaphragm and platen to the
temperatures set on the front panel. After a brief warmup time, the laminator is
ready for use.
The drawer is pulled open to allow access to load the vulcanized rubber platen
with materials ready for lamination. Products of differing thicknesses and
geometries can be intermixed during a cycle if adequate “hold-down” techniques
are employed. The layered material is placed on the platen mounted in the
sliding drawer. When the drawer is closed, the platen is positioned in the
vacuum chamber, and an O-ring seal on the drawer face contacts the opening in
the vacuum / pressure vessel.
Before the beginning of the cycle there is a vacuum drawn above the
diaphragm. Air at atmospheric pressure is in bottom of the vessel, pushing the
diaphragm upwards. As shown in figure 1, the diaphragm is up above the material
on the drawer platen. The drawer platen is spring loaded upwards to allow the
drawer to be opened and closed.
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