PURPOSE: To quantitatively feed a plastic fat such as butter or margarine by cutting the mass of the plastic fat into small cubes, charging the small cubes in a screw transfer mechanism and extruding the fat from a nozzle.

CONSTITUTION: The mass of a plastic fat is cut into fine cubes, charged in a screw transfer mechanism and subsequently extruded from a nozzle to feed the plastic fat. Before the mass of the fat is charged, the weight of the fat mass is preferably measured, and the timing for charging the next fat mass is adjusted on the basis of the measurement value to control the charging state of the fat in a cylinder.