Self-discharging mixers
There is a long history, as early as the beginning of the 20th century, driven by a steam engine drum concrete mixer has begun to appear. 50 years later, the reversed discharge type and tilting discharge type of double conical mixer and cracked cylinder mixer and so on one after another and gained development. Self-falling concrete mixer has radially arranged mixing blades on the inner wall of the mixing cylinder. When working, the mixing cylinder rotates around its horizontal axis, and the materials added to the mixing cylinder are lifted to a certain height by the blades, and then fall down by their own weight, so that the movement is repeated to achieve the effect of uniform mixing. The structure of self-falling concrete mixer is simple, generally mixing plastic concrete.
Forced mixer
Since its emergence in the early 1950s, it has been rapidly developed and popularized. The first to appear is the disk vertical shaft type forced concrete mixer. This mixer is divided into two types of vortex paddle type and planetary type. 1870s, with the application of lightweight aggregate, the emergence of the round trough horizontal shaft forced mixer, which is divided into two types of single horizontal shaft type and double horizontal shaft type, both self-fall and forced two kinds of mixing characteristics. The mixing blade has small linear velocity, good wear resistance and low energy consumption, and develops faster. Forced concrete mixer mixing cylinder rotating shaft arm is equipped with mixing blades, join the material in the mixing cylinder, in the mixing blades under the strong stirring, the formation of cross logistics. This mixing method is much stronger than the self-fall mixing method, mainly suitable for mixing dry and hard concrete.
Continuous Concrete Mixer
Equipped with spiral mixing blades, various materials were continuously weighed according to the ratio and fed into the mixer, the concrete mixed from the discharge end of the continuous outward discharge. This mixer has a short mixing time, high productivity, and its development is notable.
With the development of concrete materials and construction technology, and the emergence of many new structures of concrete mixer, such as steam-heated mixer, supercritical speed mixer, acoustic mixer, no mixing blade swing disk mixer and the second mixing of concrete mixer.
Operating Procedures of Concrete Mixer:
1、Trial run should be empty before mixing.
2、Adjust the time relay timing according to the mixing time, pay attention to adjust in the case of power failure.
3、Water moisten the mixing cylinder and blade and site.
4、Process such as electrical or mechanical failure should be unloaded part of the mixing material, reduce the load, troubleshooting before driving operation.
5、Operation and use, should be frequently checked to prevent electric shock and mechanical injury and other safety accidents.
6、When the test is finished, turn off the power, clean up the mixing cylinder and the site, and clean up the sanitation.
