Spinning cell for synthetic fiber
View Patent ↗Included is a spinning cell for a synthetic fiber such as spandex. The spinning cell includes a top closure which reduces or eliminates solvent vapor transfer, where solvent vapor process gas(es) may leave the cell and room air may be introduced into the spinning cell. A bottom closure device may also be included.
1. A device comprising:
(a) a dry spinning cell for synthetic fiber including a shaft having a substantially vertical configuration, an open top portion, an open bottom portion, and an array of spinnerets; and
(b) a top closure for reducing or eliminating solvent vapor emissions and reducing or eliminating intrusion of air into said dry spinning cell, wherein said top closure is adjacent to said open top portion of said dry spinning cell;
(c) a tray forming part of said top closure and movably supported by said shaft for movement into and out from said shaft at said open top portion; and
(d) a seal plate adjacent said open top portion of said shaft for removable positioning under said array of spinnerets upon removal of said spinnerets out from said open top portion;
said seal plate forming an air lock with said open top portion of said shaft to permit replacement of said spinnerets.
2. The device of claim 1 , wherein said top closure includes four walls which together define an internal space of substantially the same size and dimensions of the array of spinnerets.
3. The device of claim 1 wherein said seal plate is slidable across said open top portion of said shaft.
4. The device of claim 3 wherein said seal plate is a horizontal surface.
5. The device of claim 1 further includes a bottom closure for reducing or eliminating solvent vapor emissions and the introduction of air into said dry spinning cell, wherein said bottom closure is adjacent a bottom portion of said dry spinning cell; said bottom closure comprising coalescence jets and/or a filament exit guide.
6. The device of claim 5 , wherein said bottom closure comprises a front door and a side door or a front door and two opposing side doors.
7. The device of claim 6 , wherein said filament exit guide is rectangular and includes slots for each threadline on one side corresponding to said side door or on opposing sides corresponding to said opposing side doors.
8. The device of claim 1 further including a thin sheet removably positioned on said seal plate.
9. The device of claim 8 wherein said thin sheet is formed from material selected from the group consisting of cardboard, paper and aluminum.