Process for the manufacture of soap bars and apparatus for use i

Details Process for the manufacture of soap bars and apparatus for use i Process for the manufacture of soap bars and apparatus for use i

1995-02-10

1996-07-09

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

510150, 510152, 510153, 510155, 510156, 510447, 510450, 264142, 26421123, 264323, 264349, 425204, B29C 4740

Patent

active

055342124

ABSTRACT:
The invention provides a process for the manufacture of soap forms which includes the step of treating a soap feedstock by passage through a twin screw, intermeshing, counter-rotating extruder and apparatus for the manufacture of soap forms according to the process, said apparatus containing a twin screw, intermeshing, counter-rotating extruder, wherein the extruder includes two oppositely-threaded, closely intermeshing screws, the screws being non-matching and such that the ratio of the length to the diameter is greater than 1:1, mounted for rotation within a barrel having a first end and a second end, said screws having a minimal screw-to-screw and screw to barrel clearance such that as the feedstock passes along at least a part of the barrel from said first end and towards said second end it is divided into a plurality of discrete, substantially C-shaped segments bounded by the screw and barrel surfaces and conveyed in a path whereby the bulk of the feedstock move substantially parallel to the rotational axis of the screws.

REFERENCES:
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patent: 4141947 (1979-02-01), Fischer et al.
patent: 4510110 (1985-04-01), Mazzoni
patent: 4634564 (1987-01-01), Kerslake
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patent: 5156794 (1992-10-01), Nakanishi et al.
patent: 5350231 (1994-09-01), Eigruber
patent: 5364575 (1994-11-01), Doom, Sr. et al.
Twin Screw Extrusion, Janssen, pp. 6-7, Elsevier Scientific Publ. Co., 5-1980.

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