Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Patent
1988-06-09
1990-09-04
Pal, Asok
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
134 2216, 134 2217, 134 26, 134 29, B08B 310
Patent
active
049541803
ABSTRACT:
A process for cleaning organic material from the orifices of spinnerettes is disclosed. The spinnerettes are immersed in a fuse oxidizing salt bath between 500.degree. F. and 900.degree. F. The spinnerettes are placed with the orifices at an angle of 30.degree. to 75.degree. with respect to horizontal which will allow the escape of trapped gasses but prevent the settling of particles therein. The entrances of the orifices are oriented upwardly. The work pieces are treated until evidence of the reaction ceases, and are then quenched. In some cases a second treatment cycle may be necessary. The second treatment cycle may be at the same or higher temperature and in the same or a different salt. Vibration of the spinnerettes during the immersion is also desirable.
Malloy James Christopher
Pal Asok
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