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Continuous powder feeding: Equipment design and material considerations
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Date
2022-04-07
Authors
Kerins, Brian M.
Crean, Abina M.
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Publisher
Springer Nature Switzerland AG
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Abstract
The continuous feeding of raw materials is a fundamental initial step in the continuous production of solid dosage forms. The continuous feeding process is considered critical as deviations or disturbances in individual feeders may produce compositional variability in the following mixing steps. This variability may then impact downstream unit operations and result in a detrimental change to the quality attributes of the final product. To design a robust feeding process and optimise the feeding performance, it is essential to understand feeder design and the underlying relationships between the material properties, feeder tooling configuration and feeding process parameters. In this chapter a brief overview of continuous feeding equipment and feeder operation modes is provided. The chapter describes the equipment and process considerations for the design of a continuous feeding process, with a primary focus on loss-in-weight (LIW), twin-screw feeders, primarily employed during the continuous production of pharmaceutical solid dosage forms. The chapter finishes with a description of modelling approaches employed to investigate feeder performance and the integration of the feeding process to the subsequent steps of the overall continuous manufacturing process.
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Keywords
Continuous feeding , Solid dosage , Equipment , Feeder operation modes , Loss-in-weight (LIW) , Twin Screw feeders , Gravimetric powder feeding , Hopper refill
Citation
Kerins, B. M. and Crean, A. M. (2022) 'Continuous powder feeding: Equipment design and material considerations', in Fytopoulos, A., Ramachandran, R. and Pardalos, P. M. (eds) Optimization of Pharmaceutical Processes. Springer Optimization and Its Applications, 189, pp. 171–191. Springer, Cham. doi: 10.1007/978-3-030-90924-6_7
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© 2022, the Authors, under exclusive license to Springer Nature Switzerland AG. The final authenticated version is available online at: https://doi.org/10.1007/978-3-030-90924-6_7