The Air Ring
The air ring is equipped with horizontally sliding teeth that adjust the air flow through the radially located vanes in the air ring’s plenum causing preferential cooling on the outside of the bubble. A circuit board inside the air ring converts the mapped thickness profile into instructions for the scanning actuator which slides “in” or “out” a multitude of fingers (132-244 depending on air ring size), as needed, to open or close the airflow channels (vanes).
Processes the raw signal profile and the reversing or fully-rotating nip position and nip roll speed.
|Size||Diameter||Number of Air Inlets||Number of Control Zones|
|6 x 4"/102 mm||90-144|
|6 x 4"/102 mm||120-168|
|8 x 4"/102 mm||168-216|
|10 x 4"/102 mm||224-288|
|Larger ones are available upon request|
Sensor Location Options
- The Live Ring (Carousel – left image): Located between the highest frostline and the collapsers.
- ALF (AllLayFlat – right image): Located in the middle of the collapsing frame.
- Scanner: Located after the primary nip.
Thickness Sensor Options
- Capacitive (Standard)
- Air Cushioned Nuclear (Gamma Back – scatter)
- Air Cushioned Capacitive
- IR (ifrared) Identifies barrier layer thicknesses
- Graphical User Interface Displays:
- control and air profiles
- trending and profile statistical analysis
|D" x 150 = CFM
@ 80ºF & 25"H2O
|D mm x 10 = m3/h
@ 27ºC & 6.2 KPa
D"= Die diameter in inches
D mm = Die diameter in mm
CFM = Cubic feet per minute
F = Degrees Fahrenheit
C = Degrees Celsius
- Film thickness variation is corrected by the automatic adjustment of the air flow through the air ring’s vanes.
- Air flow and air ring’s optimum cooling capacity is preserved regardless of the adjustments.
- High resolution of the control is assured by the multitude of control zones that can be moved to any “in” or “out” position within each vane.
- Ethernet and single power source connection.