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1、 The development path of self falling mixers
Self falling mixers have a long history of development. As early as the early 20th century, drum type concrete mixers driven by steam engines began to appear; After the 1950s, double cone mixers with reverse discharge and tilting discharge, as well as cracked drum mixers, were successively introduced and developed.
There are radially arranged mixing blades on the inner wall of the mixing drum of the self falling concrete mixer. During operation, the mixing drum rotates around its horizontal axis, adds materials to the mixing drum, is lifted to a certain height by the blades, and falls by its own weight. This cycle of motion achieves the effect of uniform mixing. The structure of a self falling concrete mixer is simple, and it generally focuses on mixing plastic concrete.
2、 Forced mixer
Since the rise of mixers in the 1950s, forced mixers have experienced rapid development and promotion.
In the 1870s, with the application of lightweight aggregates, circular groove horizontal shaft forced mixers emerged, which were divided into single horizontal shaft and double horizontal shaft types, with the characteristics of both self falling and forced mixing; Its stirring blades have a low linear speed, good wear resistance and low energy consumption, and are developing rapidly.
3、 New type of concrete mixer
With the development of concrete materials and construction technology, many new types of concrete mixers have emerged, such as steam heated mixers, supercritical speed mixers, sonic mixers, swinging disc mixers without mixing blades, and secondary mixing concrete mixers.
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