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.
強製式攪拌機從20世紀50年代初興起後，得到了迅速的發展和推廣。先出現的是圓盤立軸式強製混凝土攪拌機這種攪拌機分為渦槳式和行星式兩種。19世紀70年代後，隨著輕骨料的應用，出現了圓槽臥軸式強製攪拌機，它又分單臥軸式和雙臥軸式兩種，兼有自落和強製兩種攪拌的特點。其攪拌葉片的線速度小，耐磨性好和耗能少，發展較快。
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.
強製式混凝土攪拌機拌筒內的轉軸臂架上裝有攪拌葉片，加入拌筒內的物料，在攪拌葉片的強力攪動下，形成交叉的物流。這種攪拌方式遠比自落攪拌方式作用強烈，主要適於攪拌幹硬性混凝土。連續式混凝土攪拌機裝有螺旋狀攪拌葉片，各種材料分別按配合比經連續稱量後送入攪拌機內，攪拌好的混凝土從卸料端連續向外卸出。這種攪拌機的攪拌時間短，生產率高、其發展引人注目。
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.
隨著混凝土材料和施工工藝的發展、又相繼出現了許多新型結構的混凝土攪拌機,如蒸汽加熱式攪拌機,超臨界轉速攪拌機，聲波攪拌機，無攪拌葉片的搖擺盤式攪拌機和二次攪拌的混凝土攪拌機等。
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.
連續式混凝土攪拌機裝有螺旋狀攪拌葉片，各種材料分別按配合比經連續稱量後送入攪拌機內，攪拌好的混凝土從卸料端連續向外卸出。這種攪拌機的攪拌時間短，生產率高、其發展引人注目。
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.
隨著混凝土材料和施工工藝的發展、又相繼出現了許多新型結構的混凝土攪拌機,如蒸汽加熱式攪拌機,超臨界轉速攪拌機，聲波攪拌機，無攪拌葉片的搖擺盤式攪拌機和二次攪拌的混凝土攪拌機等。
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.
