2. Double horizontal shaft concrete mixer. Main model of the double shaft concrete mixer is forced mixer, itsstructure is very compact, the mixing system of mixing tank with wearresistant lining board, is to use countersunk head screw will wear resistantlining board and firmly fastened together of tank, and double shaftconcrete mixer mixing barrel below with discharging door is used todischarge, set two root level in stirred tank stirring shaft direction, eachroot on the stirring shaft is equipped with mixing arm, and the mixingblades are installed on the stirring arm into spiral shape continuousarrangement;For a large concrete mixer and oversize and double shaft and double shaftconcrete mixer mixing tank used in the vast majority of stirring shaft is45 ° to 60 ° spiral, this kind of structure is very suitable for largeaggregate concrete, harsh and dry concrete mixing, and the largeaggregate concrete own mixing motion indeed improve the mixingability.