NDLI: Material Handling and Feeder Technology

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Material Handling and Feeder Technology

Content Provider	Scilit
Author	Ghebre-Sellassie, Isaac Martin, Charles E. Zhang, Feng DiNunzio, James
Copyright Year	2003
Description	Feeders are used in conjunction with extruders in the pharmaceutical industry for both melt extrusion and wet granulation processes to accurately meter solids and liquids. Feedstocks include pellets, powders, granules, gases, and liquids. Materials are either continuously metered directly into the extruder, or alternatively into a vessel to facilitate a premix that will then be fed into the extruder. Feed streams are introduced into the extruder either in a ''starve-fed'' manner, where the rate is set by the feeders and is independent of the extruder screw rpm; or alternatively via gravity, referred to as ''ﬂood feeding,'' where the hopper sits over the feed throat opening and the extruder screw rpm determines the throughput. Twin-screw extruders are typically starve fed, and single-screw extruders are normally ﬂood fed. Figure 1 shows a typical, continuous, starve-fed melt extrusion installation with multiple feeders. Book Name: Pharmaceutical Extrusion Technology, Second Edition
Related Links	https://content.taylorfrancis.com/books/download?dac=C2009-0-05245-5&isbn=9780429213694&doi=10.1201/9780203911532-9&format=pdf
Ending Page	153
Page Count	24
Starting Page	130
DOI	10.1201/9780203911532-9
Language	English
Publisher	Informa UK Limited
Publisher Date	2003-05-14
Access Restriction	Open
Subject Keyword	Book Name: Pharmaceutical Extrusion Technology, Second Edition Biomedical Engineering Granules Extruder Feeders Rpm Meter Screw Fed Starve ﬂood
Content Type	Text
Resource Type	Chapter

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