The modern soap making uses a duplex vacuum plodder for the final refining, compacting & air free extrusion of a continuous bar especially in toilet soap. The plodder (extrusion machine) is a crucial piece of equipment in the entire soap plant. It plays a major role and gives a final shape in bar form to soap mass. In the first stage soap is compressed, refined and supplied to the vacuum chamber in shape of noodles. The soap is refined by means of a refiner worm press. In order to reach the refining effect, a refining sieve (screen) (perforated disc) is fitted at the outlet of machine. A noodle cutter is fitted very near to same disc which is used for cutting of soap noodles. When the soap mass passed through the same perforated disc it is transferred into noodles form. The noodles fall into the vacuum chamber, where they are taken up by the main extrusion worm press, again compressed continuously and then extruded in the form of bar. Distinctive design of die is provided with the mouth piece of extrusion barrel to achieve a particular size of bar and then bar cut into a fixed size of length. The plodder machine is equipped with suitable cooling jackets system. End of the conical compression head is heated by electrically heated oil bath chamber under the control of a temperature controller to get glossy surface on the soap bar. Design of overall machine with super finely grinded barrels and extrusion cone as well as very special design of machine's extrusion screws and cone give so extremely well result of refining, compacting of soap.