Abstract: An apparatus for molding pieces of soap or other soft and pasty substances having at least a central rotor (2) capable of a reciprocating rotating motion supporting two half-molds (4, 4') placed at 90.degree. and at least two lateral rotors (1, 1') capable of a reciprocating rotating translating motion, each supporting a half-mold (3, 3'), the three rotors (1, 1', 2) having their axis of rotation parallel to the feeder and discharge conveyor belts (6, 6', 7, 7', 8). Between each lateral rotor (1, 1') and the central rotor (2) an elevator/lifting device (5, 5') or other apparatus lifts/raises the pieces (19, 19') to be shaped from the feeder belt (7, 7') and brings them to the molding area, each lateral rotor (1, 1') capable of a rotating translating motion, translating in a radial direction towards the central rotor (2) molds the piece and then moves away with the molded piece (10, 10') and while rotating deposits it on the discharge conveyor belt (6, 6') of the molded pieces.

Abstract: Pressurized colored liquids are inserted in the base mass, immediately upstream or in correspondence with the last homogenizing means; then a rotor arranged between the last perforated refining means and the extrusion hole, provides for a partial mixing of the paste. The speed of rotation of the rotor is adjustable from outside of the extrusion head, and independent of the speed of the extrusion screw.