| 摘要 |
A rotatable drum mixer of the type suitable for mounting in a mobile system for mixing and dispensing concrete is disclosed. An upstanding, single, full length, helical mixing fin (80) is provided from the interior of the mixer. The invention includes the provision of an auxiliary agitating fin (82) mounted in a forward portion of the drum (58), and a pair of outlet flights (90, 92) provided near a discharge section of the drum mixer. The auxiliary agitating fin (82) is mounted to the drum interior via a support bar (84) which also serves to break up climbs of unmixed material.
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