Instrumentation of a Kenwood Major Domestic-Type Mixer for Studies of Granulation

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Abstract
The mixer was reconstructed and equipped with a torque transducer consisting of a steel beam, with strain gauges in a full bridge circuit, which prevented the rotation of the bowl. Repeated loadings of the separate steel beam with weights resulted in a relative standard deviation of less than 0.2%. However, tangential loading of the equipment with a dynamometer resulted in a relative standard deviation of 1.2% because of the inaccuracy of the dynamometer load. The smallest detectable load was about 98· 10-3 N, corresponding to 1–2% sensitivity within the interesting part of the granulation curve. The average torque was calculated. The recording mixer was simple to handle and proved a suitable tool for granulation studies.

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