Self falling mixer
Has a long history, as early as the beginning of twentieth Century, driven by a steam engine drum type concrete mixer has begun to appear. After the 1950s, reversing the type material and tilt pulls out feeding type double tapered mixer and crack drum mixer etc. in succession and development. On the inner wall of the self – falling concrete mixer, the mixing blades are radially arranged on the inner wall. After work, the mixing drum around the horizontal axis rotary and join the mixing tube material, the leaves are up to a certain height, by the weight drop, so the cycle of movement to stir effect. The structure of the self – falling concrete mixer is simple, which is generally based on the mixed concrete.
Forced mixer
Since the beginning of 1950s, the rapid development and popularization of the. The first is the vertical disc type forced concrete mixer. This mixer is divided into two types, one is the vortex and the one is the one. After the seventies of the 19th century, with the application of lightweight aggregate, circular groove horizontal shaft type forced mixer. It is divided into two kinds of single horizontal shaft type and the double horizontal shaft type, both from the fall and forced two kinds of mixing characteristics. The linear velocity of the blades is small, the wear resistance is good and the energy consumption is little. The forced concrete mixer is arranged on the rotating shaft of the rotating shaft of the mixing barrel, and the mixing blade is arranged on the rotating shaft, and the material is added into the mixing barrel. The stirring mode is much stronger than that of the self – stirring mode, which is mainly suitable for mixing dry hard concrete.
Continuous concrete mixer
Equipped with spiral shaped blades, all kinds of materials are fed into the mixer, and the concrete is continuously discharged from the discharge end. The mixing time is short, the productivity is high, and the development of this kind of mixer is notable.
With the development of concrete materials and construction technology, many new types of concrete mixer, such as steam heating type mixer, supercritical speed mixer, sound mixer, the mixing vane of the rolling disc mixer and the two stirring of concrete