Belt-driven soap plodder/extruder with a feed hopper and a horizontal screw barrel that compresses and extrudes the soap paste into a continuous bar. Used in soap manufacturing to refine, homogenize and shape the soap mass. The machine carries the MIAG maker's mark (Mühlenbau und Industrie AG, Braunschweig, Germany — a historic German machine builder, later part of Bühler). Robust metal construction.