Since the beginning of the 20th century, drum type concrete mixer driven by steam engine began to appear. After the 1950s, the double cone mixer with reverse discharge and tilting discharge and the split drum mixer came out and developed one after another. There are mixing blades arranged radially on the inner wall of the mixing drum of the self falling concrete mixer. During the operation, the mixing drum rotates around its horizontal axis, and the materials added into the mixing drum are lifted to a certain height by the blades, and then fall by its own weight, thus achieving the effect of uniform mixing. The structure of self falling concrete mixer is simple, and plastic concrete is the main mixing material.
强迫式搅拌机从20世纪50年月初鼓起后，取得了敏捷的成长和推行。先呈现的是圆盘立轴式强迫混凝土搅拌机这类搅拌机分为涡桨式和行星式两种。19世纪70年月后，跟着轻骨料的利用，呈现了圆槽卧轴式强迫搅拌机，它又分单卧轴式和双卧轴式两种，兼有自落和强迫两种搅拌的特色。其搅拌叶片的线速率小，耐磨性好和耗能少，成长较快。
Since the emergence of forced mixer in the early 1950s, it has been rapidly developed and popularized. First appeared is the disk vertical shaft type forced concrete mixer, this mixer is divided into two types: vortex paddle type and planetary type. After 1870's, with the application of lightweight aggregate, the forced mixer with round trough horizontal shaft appeared. It can be divided into single horizontal shaft type and double horizontal shaft type. It has the characteristics of self falling and forced mixing. The mixing blade has the advantages of low linear speed, good wear resistance and less energy consumption.
强迫式混凝土搅拌机拌筒内的转轴臂架上装有搅拌叶片，插手拌筒内的物料，在搅拌叶片的强力搅动下，构成穿插的物流。这类搅拌体例远比自落搅拌体例感化激烈，首要适于搅拌干硬性混凝土。持续式混凝土搅拌机装有螺旋状搅拌叶片，各类资料别离按共同比经持续称量后送入搅拌机内，搅拌好的混凝土从卸料端持续向外卸出。这类搅拌机的搅拌时候短，出产率高、其成长惹人注视。
The rotating shaft boom in the mixing drum of the forced concrete mixer is equipped with mixing blades. The materials added into the mixing drum form cross logistics under the strong stirring of the mixing blades. This kind of mixing method is much stronger than the self falling mixing method, and is mainly suitable for mixing dry hard concrete. The continuous concrete mixer is equipped with spiral mixing blades. Various materials are continuously weighed according to the mix proportion and sent into the mixer. The mixed concrete is continuously discharged from the discharge end. This kind of mixer has the advantages of short mixing time, high productivity and remarkable development.
跟着混凝土资料和施工工艺的成长、又接踵呈现了很多新型布局的混凝土搅拌机,如蒸汽加热式搅拌机,超临界转速搅拌机，声波搅拌机，无搅拌叶片的扭捏盘式搅拌机和二次搅拌的混凝土搅拌机等。
With the development of concrete materials and construction technology, many new types of concrete mixers have emerged, such as steam heating mixer, supercritical speed mixer, sonic mixer, swing disc mixer without mixing blades and secondary mixing concrete mixer.
持续式混凝土搅拌机装有螺旋状搅拌叶片，各类资料别离按共同比经持续称量后送入搅拌机内，搅拌好的混凝土从卸料端持续向外卸出。这类搅拌机的搅拌时候短，出产率高、其成长惹人注视。
The continuous concrete mixer is equipped with spiral mixing blades. Various materials are continuously weighed according to the mix proportion and sent into the mixer. The mixed concrete is continuously discharged from the discharge end. This kind of mixer has the advantages of short mixing time, high productivity and remarkable development.
跟着混凝土资料和施工工艺的成长、又接踵呈现了很多新型布局的混凝土搅拌机,如蒸汽加热式搅拌机,超临界转速搅拌机，声波搅拌机，无搅拌叶片的扭捏盘式搅拌机和二次搅拌的混凝土搅拌机等。
With the development of concrete materials and construction technology, many new types of concrete mixers have emerged, such as steam heating mixer, supercritical speed mixer, sonic mixer, swing disc mixer without mixing blades and secondary mixing concrete mixer.