Abstract
The Manesty 45 station Rotapress was instrumented to measure compressional force, ejection force, and lower punch pulldown force. Various positions in the pressure linkage were monitored to determine the optimum location for compressional force measurement. The upper part of the compression column just below the link to the upper roller carriage was chosen for installation of strain gauges for compressional force measurement. Ejection force was measured by installing a force washer beneath the head of the bolt which holds the ejection cam in place. The ejection cam was not modified in any way. Lower punch pulldown force was measured by using a bolt containing internally mounted strain gauges to replace one of the three bolts normally holding the pulldown cam in position. Examples of the results obtained by compressing antacid tablets at various speeds and forces are given. Data collected over a 24-day period on the compression of these tablets under regular production conditions are given.
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