Self falling and forced type concrete mixers

Concrete mixers can be divided into two categories based on their working principle: self falling and forced type. The self falling concrete mixer is suitable for mixing plastic concrete. The mixing effect of a forced mixer is stronger than that of a self falling mixer, and it is suitable for mixing dry hard concrete and lightweight aggregate concrete.

Self falling concrete mixer, also known as free falling mixer. A mixer that allows materials to fall freely. In a self falling mixer, the mixing drum rotates at an appropriate speed The material continuously rotates and is mixed in a mixing drum equipped with mixing blades. The blades continuously lift the material to a certain height, and the material falls freely from the blades under their own weight. This repeated mixing ensures the uniformity of the material mixing.Plastic concrete is a high flow concrete with low cement content and a large amount of bentonite, clay and other materials added. It has characteristics such as low strength, low elastic modulus and large strain. Due to its elastic modulus of up to 2000, it is a flexible material that can adapt well to softer foundations and has good anti-seepage performance. It is widely used in anti-seepage of water conservancy projects.Concrete mixture with a slump of 10~90mm.The characteristic of plastic concrete in terms of mix proportion is that the amount of cement used is relatively small, usually about 80-170kg/m3. In addition, some clay or (and) bentonite (with high plasticity index) needs to be added, and the requirements for the amount of other materials are basically the same as those for general concrete.

The forced mixer consists of a drum, frame, motor, reducer, rotating arm, mixing shovel, cleaning scraper, etc Due to the use of a cross axis assembly between the mixing shovel and the rotating arm, and the setting of a pull rod or screw to regulate the working clearance of the mixing shovel, the phenomenon of hard materials getting stuck can be basically eliminated, thereby reducing operating resistance and wear. The working face of the mixing shovel has an obtuse angle with the forward direction in both vertical and horizontal directions, which can enhance the mixing effect and improve the mixing quality. The discharge port is located on the side wall of the material cylinder, which can swing laterally relative to the frame. A cleaning scraper is also installed to accelerate the discharge and make it more thorough, while reducing mud leakage. Drive scheme: The motor and transmission mechanism are placed below the mixing drum; Drive directly with a cycloidal pin reducer. The safety during use has been guaranteed, avoiding the occurrence of some accidents.