Richard Allen Frank

US Patent:

D2711303, Oct 25, 1983

Filed:

Jun 25, 1979

Appl. No.:

6/051874

Inventors:

Richard K. Frank - Sumner WA
Gerald L. Quimby - Sumner WA

International Classification:

D2303

US Classification:

D23 97

US Patent:

50510886, Sep 24, 1991

Filed:

Apr 11, 1988

Appl. No.:

7/179781

Inventors:

Richard L. Frank - Charlotte NC

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

B29C 4730

US Classification:

425 722

Abstract:

An improved spin head for a melt spinning machine is capable of being readily disassembled. The spin head is provided with a tubular sleeve member which defines an elongate open ended interior cavity oriented along the melt spinning axis and a core insert member removably received within this interior cavity. A spinneret is removably coupled to an end of the core insert member and a pump is fluid connected via polymer passageways defined in the insert member between a molten polymer supply apparatus (e. g. , a screw extruder) and the spinneret. Heating elements (which, in the preferred embodiment, are integral with the sleeve member) maintain the various structural components at elevated temperatures so that, during operation, the polymer is likewise maintained at elevated temperatures sufficient to maintain it in a molten state. During a shut down period, however, the sleeve member may be heated by these same heating elements to prevent polymer solidification and thus permit the various component structures to be readily disassembled for cleaning. In such a manner, the down time for the melt spinning machine is minimized.