Manufacturing Natural Soap Part 2


The extra moisture is flashed under 45-60 mm Hg vacuum and removed as vapor after scrubbing to regain any soap fines carried-over with the exiting vapor stream. Good control of moisture, temperature, vacuum, flow rate, nozzle pressure, and scraper function guarantees the drying of acceptable quality soap pellets. Typically these soap pellets are conveyed pneumatically to storage bins/silos that act as surge for the soap finishing process. Soap storage silos are assembled of stainless steel and have angled bottoms that direct soap pellets toward centrally located twin discharge screw conveyers for efficient transfer to the finishing lines. 3

Soap Finishing

The initial point for soap finishing is usually the amalgamator, a horizontal mixer that coarsely blends soap pellets with minor ingredients such as color and fragrance. The soap mix from amalgamation is conveyed to subsequent processing stages like milling and refining to give reasonable homogenization and working of the soap before extrusion. A mixer/refiner process is also accessible for blending of soap pellets with minor ingredients on a more constant basis. Sufficient running of the soap through fine-mesh screens in the refining stages gives uniformity and frictional heat essential to create acceptable-quality billets for pressing into bars. The final finished product is extruded from the last plodder as a continuous slug. Vacuum is provided at the final extrusion chamber to evacuate entrained air. This step makes certain the extrusion of a uniform slug that will not divide or exhibit surface bubbles/deformities. A multi-blade chain cutter or uni-blade cutter with blades separates the extruded slug into individual "billets" that are stamped with a press into soap bars of the desired size and shape.

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