Design, modification and performance testing of the batch type feed mixer
Tanco, C.B.
The feed mixer consisted of collection bin, screw conveyor bolted on to a 2.54 cm shaft and protected by a tube 100 cm long, mixing paddle, gathering paddle bolted on to the screw conveyor, sacking spout with a slide, frame, 1/4 hp electric motor and V-belts and pulleys for transmission. The machine could be operated by one man with a small amount of spillage. The mean mixing time for 25 kg of ingredients for all the speeds tested was 3.33 minutes at a maximum efficiency measure of 98.4% by weight of feeds. Fifty kilograms of ingredients were mixed for 5.33 minutes with an efficiency of 87.3%. The machine was 4.5 times as efficient as the manual method in terms of mixing time. A minimum feed loss of 6.4% and a maximum of 13% was observed at speeds of 170 rpm and 220 rpm, respectively. The time needed to mix ingredients manually was 8.95 minutes with an efficiency of 97.6% by weight of feed and required a power of 0.15 man-hour. The least power requirement for the machine was 0.0225 kw-hour at 220 rpm.
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