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Screen Printer Model 2125

The Model 2125 screen printer is a high precision printer specifically designed for multilayer ceramic devices in which several layers of different conductor patterns must be vertically aligned with a high degree of registration accuracy.

The platen raises and lowers to allow the ceramic to be easily placed in the machine. The platen rises into position for screening with the pressing of the two hand no tie-down. The screen size is 12" x 12".

The squeegee prints and floods automatically and in sequence with the positioning of the screen into the print position. Snap-off is manually adjustable with stops calibrated in thousandths of an inch.

Tooling is provided for the platen which is equipped with precision located registration pins to engage the holes in the carrier tape. These pins will automatically retract when the platen rises into print position. This prevents the pins from puncturing the screen. To hold the work piece from moving when the pins are retracted a vacuum is applied through a pattern of small holes under the work.

Printer Specifications
Height:
24 Inches
Width:
18 Incches
Depth:
24 Inches
Weight:
200 Pounds
Electrical:
None
Air:
100 PSI
Ventilation:
Hood

Print Drier (Integrated with printer)
Drying of the print is performed by a heated drum dryer. The carrier film moves automatically from the printer into the dryer where it passes around a 1 meter diameter drum. The drum is heated electrically and air is passed over the surface of the print to assure complete drying. The drying system can process prints at the rate of around one print every 5 seconds with ink of normal drying rate. The printer will not normally exceed this rate.

Drying the prints is a very important part of the process because the prints are very vulnerable to damage when wet, and there are a lot of them. Even in a lab environment there are times when 10 bars might be wanted for various tests. If each bar has 20 layers, 200 prints will be produced.

The prints must be dried immediately after printing in preparation for stacking. The drying system must be designed to protect the wet prints from airborne contamination. Just as it is important to keep dust out of the tape casting process, so it is important in the printing and drying operations.

Another requirement for the drying system is to assure that the prints receive identical drying cycles. Drying is a process variable that can effect other process steps. For example there may be some dimensional changes associated with the loss of absorbed solvents. Also, depending on the binder characteristics, lamination can be effected by the degree of dryness of the ceramic.
Drier Specifications
Height:
48 Inches
Width:
50 Incches
Depth:
32 Inches
Weight:
150 Pounds
Electrical:
115 VAC
Air:
None
Ventilation:
Hood
 
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