Optek DPL-24 Manuel utilisateur
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Operations Technology, Inc.
OPTEK DPL-24 Users Guide
Operations Technology Inc.
30 Lambert Road
PO BOX 408
Blairstown NJ 07825
Phone 908 362-6200 • Fax 908 362-5966
OPTEK DPL-24
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Table of Contents
Introduction 4
Overview 5
Principles of Operation 6
Site Requirements 8
Specifications 9
Installation 10
Operation 12
Example 13
Precautions 14
Maintenance 14
Recommended Spare Parts 16
Ordering Information 16
Warranty 18
Index 19
OPTEK DPL-24
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V
acuum lamination of printed circuit boards has been utilized
for many years. But it was not until the development of the
DPL-24 that a system provided vacuum prior to the
application of positive pressure.
No pressure is applied to the product during the vacuum
dwell cycle. In this way maximum evacuation of air from
between the substrate and the laminate is assured.
During the pressure cycle a flexible diaphragm encapsulates
the product and true isostatic lamination is achieved. Unlike
roll laminators, the DPL–24’s diaphragm descends directly
towards the platen. No lateral stress is applied , hence less
distortion of the film can occur.
A Differential Pressure Laminator
INTRODUCTION
he DPL-24 Differential Pressure Laminator has been designed to give the
operator a superior method for laminating sheet supported emulsions such
as dry film solder mask, etc. Such materials can be applied to various
thicknesses and sizes of substrates. Experimentation is being done on alternative
uses for this device, among them, High Vacuum, Multi-Layer, Pressing of Printed
Circuit Boards and microBGA interconnects.
The substrate, prelaminated either manually, or utilizing the
A cold-roll lamination technique, is placed on the vulcanized rubber
platen mounted in the drawer
and positioned in the vacuum
chamber. Products of
differing thicknesses and
geometries can
be intermixed during a cycle if
adequate “hold-down”
techniques are employed.
The massive 1000 LB
chamber is constructed of
Ductile Iron and uses only
two o-rings. This design
ensures a positive seal for best
vacuum performance.
Utilizing a high quality, high volume 45 CFM, 3 horsepower, rotary
vane vacuum pump, an end point below two Torr is typically achieved.
T
OPTEK DPL-24
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OVERVIEW
• The vacuum is displayed on a thermocouple sensing, computer calibrated, digital
gauge located on the front panel.
• The substrate is exposed to this Vacuum Dwell for a time determined by a
precision digital timer which is adjustable from .1 seconds to 9990 hours.
• At the end of the Vacuum Dwell, a preheated silicone rubber diaphragm
descends onto the work-piece and drives the spring-mounted drawer
mechanism into intimate contact with the lower heater platen.
• The temperatures of both the upper and lower heat platens are controlled
independently by digital, proportional, Temperature Controllers.
• A positive pressure of up to 10 PSI is applied to the top of the diaphragm to
bring the combined differential to nearly 25 PSI.
• The Pressure Dwell is adjusted by a precision digital timer identical to that
employed by the Vacuum Dwell.
• Upon completion of a cycle, the drawer mechanism is retracted and the
product(s) removed for further processing.
• The entire process is governed by a microprocessor driven programmable
controller. Programming modifications are available from the factory.
OPTEK DPL-24
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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.
OPTEK DPL-24
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PRINCIPLES OF OPERATION (CONTINUED)
When the cycle starts, vacuum is drawn on both ports, above and below the diaphragm.
Utilizing a high volume vacuum pump, an end point approaching two Torr is achieved.
This vacuum is displayed on a digital gauge located on the front panel. A programmable
timer adjustable from .1 seconds to 9990 hours determines the vacuum dwell time before
continuing to the next step Figure 2. It is important to note that this dwell time will
allow air between the layers of material to be evacuated before the lamination pressure
cycle begins, eliminating trapped bubbles. Because the vacuum is equal above and below
the diaphragm, it does not move and does not contact the material in the drawer.
At the end of the Vacuum Dwell, positive air pressure at up to 10 PSI is
applied to the port above the diaphragm bringing the pressure differential to nearly
25 PSI. see figure 3, The preheated silicone rubber diaphragm descends onto the
workpiece. This action drives the spring-mounted drawer platen into contact with
the lower heater platen. Isostatic pressure is transferred to the material by the
diaphragm. The stretching effect that occurs with roll type laminators is minimized.
The flexible diaphragm conforms to the surface shape assuring positive contact
between the layers, thereby eliminating voids. The pressure dwell time is controlled
by another timer identical to the vacuum dwell timer.
OPTEK DPL-24
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PRINCIPLES OF OPERATION (CONTINUED)
At the end of the pressure dwell cycle, the top port is connected to the
vacuum pump again, and the bottom port is vented to atmospheric pressure. As shown
in figure 4, this returns the diaphragm and drawer platen to their original positions and
allows the drawer to be opened for unloading.
SITE REQUIREMENTS
Dimensions: 44" Wide X 44" Deep X 60" High, exclusive of leveling feet (1" to 2")
Weight: 2,200 LBS (shipping)
Electrical Requirements: 208/220 VAC, 3 Phase, 40 Ampere/Phase
Compressed Air: Dry, Filtered, 70 PSI, 3 CFM
OPTEK DPL-24
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SUBSTRATE SPECIFICATIONS
Productivity:
Cycle time is adjustable from 0 to infinity and is determined by application
parameters such as circuit complexity, ground plane areas, circuit heights, flow
temperatures, etc. Typical times for a dry-film solder mask application would be 30
seconds for Vacuum Dwell and 20 seconds for Pressure Dwell.
Substrate size:
Items up to 24" X 24" can be laminated. Smaller substrates can be
processed in multiples if space permits and can be intermixed providing adequate
hold-down techniques are observed.
Substrate Thickness:
Thicknesses from .001" to .375" can be accommodated though standard
board hold-down bars .
OPTEK DPL-24
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INSTALLATION
Due to the weight of the unit a forklift is mandatory for removal of the
DPL-24 from the pallet and, for final positioning.
1. Upon receipt of equipment inspect for obvious external damage.
2. Remove Tri-Wall cardboard box or wooden crating and inspect for damage to
the machine itself. Do not attempt to slide the chamber drawer.
3. Using a forklift roughly place the DPL-24 utilizing the attached pallet,
4. Remove lower back panel
5. Remove the four bolts securing unit to pallet.
6. Raise unit with forklift blades positioned under main vessel, being careful not to
damage main valve. (see illustration below)
7. Install leveling feet
(included) into
threaded holes
formerly occupied by
shipping bolts.
8. Position, lower, and
level the unit.
9. WARNING: IT IS
IMPERATIVE
THAT OIL BE
ADDED TO PUMP
BEFORE
OPERATION!
LIFT HERE
ROTATION
OPTEK DPL-24
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INSTALLATION (CONTINUED):
10. Supply Compressed Air to input nozzle on right side rear of the machine.
11. Adjust primary regulator to 50-80 PSI.
12. Adjust secondary regulator to 5-10 PSI.
WARNING: DO NOT ATTEMPT TO ADJUST
REGULATOR PAST STOP!!!
DO NOT REMOVE PIN UNDER ANY CIRCUMSTANCES!!!
13. Ensure that switch on pump is in the “OFF” position.
14. Wire and Connect 220 VAC, 3 Phase, 40 Ampere power to input cable.
15. Activate “Main Power” switch on front panel.
16. Momentarily depress “Emergency Reset” switch on front panel.
17. Activate “Vacuum Pump” switch on front panel.
18. With one person at switch and one person at the pump, “JOG” the vacuum
pump switch and monitor the pump to ensure proper rotation indicated by the
arrow found on motor end case.
Note: If the rotation is opposite to that indicated,
reverse any two phases of incoming power.
19. Upon determination of proper pump rotation, leave pump mounted switch in
“`ON” position.
Your DPL-24 unit is now
ready for operation.
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