METHOD AND APPARATUS FOR INJECTING LIQUID INTO DETERGENT MASS

摘要

A liquid component can be introduced into a detergent bar by injecting liquid within or immediately downstream of a multi-apertured plate positioned before the compression cone of an extruder. The method can be used to produce marbled bars with the aid of a colored liquid and is described in U.K. Pat. No. 1,387,567. When a double extruder is used together with a common compression cone the injected liquid becomes unevenly distributed within the detergent. Even distribution of the liquid as striations is achieved by use of a partition in the cone to ensure each detergent stream is subjected to separate compression during movement down the cone. The partition extends to the final extrusion plate; the velocities of the two streams are equalized by having a common extrusion volume between after the two screw extruders.