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September 1, 2002

1 Min Read
Air ring has adjustable bolts to correct film deviation


NP_Addex.jpgThe Manual Gauge Control air ring (MGC) permits selective adjustment to correct film gauge deviation?caused by extruder, die, or ambient anomalies?by as much as 30 percent. The film thickness control is external to the film bubble, and can be manually operated.

Depending on die size, the MGC is equipped with anywhere from 100 to more than 200 individually adjustable control bolts in 10-mm-wide air channels. Bolt covers ensure that only authorized personnel can make adjustments.

Making gauge corrections with the MGC can be compared to adjusting die bolts to correct uneven film thickness distribution. A spot is marked on the film bubble indicating its orientation, the gauge of the film sample with the marking is measured offline and plotted, and the relevant adjusting bolts are turned in or out to make corrections. The amount of correction per bolt turn can also be determined with before-and-after measurements.

Addex Inc.
Hingham, MA
(781) 741-9801
www.norplas.co.uk

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