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A cream separator is a mechanical device that is used to separate milk into cream and skim milk. The device works on the principle of centrifugal force, which causes the denser skim milk to move to the outer edge of a spinning bowl, while the lighter cream collects in the center.
Cream separators were first invented in the mid-19th century, and they quickly became an important tool in the dairy industry. Before the advent of cream separators, dairy farmers had to separate cream from milk by allowing the milk to sit in a container until the cream rose to the top. This was a slow and inefficient process, and it often resulted in inconsistent separation.
Cream separators come in a variety of sizes and designs, but most consist of a spinning bowl with a spout for the skim milk and a spout for the cream. The milk is poured into the bowl, and the machine is started, causing the bowl to spin rapidly. As the milk spins, the centrifugal force causes the cream to collect in the center of the bowl, where it can be drawn off through the cream spout. The skim milk is forced to the outer edge of the bowl, where it can be drawn off through the skim milk spout.
Cream separators are still used today in some small-scale dairy operations, but they have largely been replaced by more efficient and automated methods of milk separation in larger commercial dairy facilities.