Method for cleaning spinnerettes
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United States of America Patent
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-
Sep 4, 1990
Issued Date -
N/A
app pub date -
Jun 9, 1988
filing date -
May 15, 1987
priority date (Note) -
Expired
status (Latency Note)
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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.
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