The invention relates to a
grinding machine for separating and removing silver
skin contained in coffee beans so as to restore the original taste of the coffee beans and keep the freshness of the coffee beans. In addition, according to the invention, the silver
skin positioned at the central notch position of the
coffee bean is separated and removed, so that the original
flavor and fragrance of the coffee can be improved. In addition, the present invention makes it possible to effectively separate and remove silver
skin contained in coffee beans in a short time without requiring a large-scale device and a complicated treatment process. In addition, the present invention separates and removes the silver skin located at the
cut in the center of the
coffee bean, thereby maintaining the freshness of the
coffee bean and prolonging the
shelf life. Furthermore, the present invention eliminates the deterioration factors of the
coffee flavor, which may be caused by the mixing of coffee bean fibers, coffee oil, and the like, and can further extract coffee having an excellent
flavor. In addition, according to the invention, the silver skin positioned at the central notch of the coffee bean is separated and removed, so that the extraction amount of the coffee is increased, and the material cost of the coffee bean can be saved.