The mixing time of the foundry sand mixer varies depending on the material, type of mixer, process requirements and other factors. The following are some specific mixing time references:

For production mixers, the most suitable mixing time can be determined by experiment. A common method is to mix the molding sand according to the process regulations, and take samples of the mixed molding sand to determine its wet compressive strength. Then gradually extend the mixing time and measure the wet compressive strength of the molding sand again until the strength no longer increases, that is, it reaches the "peak strength". It is generally believed that the strength of the molding sand reaches about 80-90% of the peak value, which is the most suitable strength for use in production. The mixing time at this time is the most suitable mixing time. This method can flexibly adjust the mixing time according to the specific material and process requirements.

In the mixing process of water glass sand for casting, the mixing time of the surface sand is best controlled at about 10 minutes. The specific operation is to dry mix for 2 minutes, and then add water glass to wet mix for 8-10 minutes to produce sand. This time setting helps to ensure the uniform mixing and suitable working performance of the water glass sand.

For the mixing process using resin sand, the mixing time is generally 1-2 minutes. The order of adding materials is to add sand first, then add curing agent and mix thoroughly, and then add resin and mix thoroughly and then use the sand immediately. This time setting is designed to ensure the rapid and uniform mixing of resin sand to meet the requirements of the casting process.

The technical parameters of the AKW sand mixer show that its mixing time range is 3-7 minutes. This provides a reference for a specific sand mixer model and its corresponding sand mixing time range.

In summary, the mixing time of the foundry sand mixer varies depending on the specific situation and can be flexibly adjusted according to factors such as experimental methods, material types, sand mixer models, and process requirements. In actual operation, it is recommended to conduct experiments and optimization according to the specific situation to determine the best sand mixing time.