Signal processing methods for melt pump outlet pressure analysis

Hosangadi, Gurudutt; Ellison, Michael S.; Gowdy, J.N.

doi:10.1109/secon.1995.513087

Cited by 1 publication

(2 citation statements)

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“…We observed and have reported previously that the meshing and unmeshing action of the gear teeth in the melt pump result in periodic pulsations in the pump exit pressure [5,6]. The viscosity of PP at our processing conditions is very consistent.…”

Section: Resultssupporting

confidence: 80%

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Gear Pump Performance in Polypropylene Filament Yarn Uniformity

Shumpert

Padsalgikar

Ellison

et al. 1996

International Polymer Processing

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We report the development of a high resolution computerized monitoring system for fiber melt spinning and the results of its application to polypropylene fiber production. Variation in pack pressure caused by the melt pump was found to significantly affect the uniformity of the filament linear density. In this study, the variation in the pack, or gear pump outlet, pressure during polypropylene fiber melt spinning is correlated with various process parameters and the resulting fiber characteristics. We found the coefficient of variation in pump discharge pressure to decrease with increasing pump capacity and pump speed. The coefficient of variation in pack pressure was directly correlated with the coefficient of variation in filament yarn uniformity. Pump wear was found to have a marked impact on the variance in pack pressure.

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Section: Resultssupporting

confidence: 80%

“…The acquired data can be both displayed and recorded. Details of the data acquisition and analysis hardware and software have been reported elsewhere [5].…”

Section: Data Acquisition Systemmentioning

confidence: 99%