Soy milk maker
Although soy milk is available in most supermarkets, there are several reasons that people still want to make soy milk by themselves: Concerns of additives in commercial soy milk; Home made soy milk is less expensive than commercial soy milk; Comercial soy milk is not available in some cities. Making soy milk manually is a very tedious process. It including soaking bean, grind soybean with a blender, straining soy milk to separate the milk from the okara (soy pulp), and then cooking soy milk. Soy milk maker is a small household appliance that can automate the process.
The soy milk maker works like a combination of a home blender and an automatic coffee maker. For SoyaJoy soy milk maker (which is what I have), properly soaked soybean is placed into the filter cup. Some studies claims that Soaked soybean makes much better soy milk than using dry soybean. The soaked soybean is ground into a fine paste inside the soy milk maker. Then the soy milk is filtered through a filter and the residue, which is known as okara, is left in the filter. Both the soymilk and the okara are fully cooked. For the SoyaJoy soy milk maker, the whole process is controlled by two sensors and a micro-processor so that the machine is fully automated. All you do is to add proper amount of water and soaked soybean and press one button. The soymilk can be used directly as a hot or cold drink or in other recipes. The okara, rich in natural fiber, can be cooked into many recipes. The soy milk maker typically has a smart sensor to make sure the soymilk will not over flow during the boiling process. Every time when the soymilk is about to boil-over, the soy milk maker will stop the heating. It waits a moment and starts the heating again when the foam comes down. It repeats this cycle until the soy milk is fully cooked.
Some information is from www.soymilkmaker.com where I bought mine.