Claims
- 1. A melt spinning apparatus for spinning coal and petroleum pitch to pitch fiber comprising:
- a spinning pack;
- a spinneret positioned within a lower end of said spinning pack, said spinneret having a plurality of circularly or concentrically arranged nozzles;
- a heater assembly arranged concentrically about said spinning pack;
- a flow uniforming member directly attached to and extending from a central part on a spinning side of said spinneret, said flow uniforming member having a sectional diameter at said spinneret which is at least 3 mm smaller than the diameter of the innermost row of nozzles of said spinneret, said flow uniforming member also having a length of between 2 cm and 20 cm; and
- a ring-shaped cooling means provided as an outer peripheral portion attached to said lower end of said spinning pack, said cooling means being concentric with and spaced from said flow uniforming member, said cooling means further having an annular blowing port for blowing a cooling gas toward spun filaments and said flow uniforming member, said cooling means being attached to said spinning pack through a heat insulating means;
- wherein said flow uniforming member has an inlet port for the cooling gas, said inlet port being formed in a lower part of the flow uniforming member opposite said spinneret, and a plurality of cooling gas outlet ports formed in a side wall of said flow uniforming member which are opposite said cooling means to direct cooling gas towards said spun filaments and said cooling means form a direction directly opposite of said cooling means, said outlet ports being located between 3 and 35 mm from said spinneret.
- 2. A melt spinning apparatus according to claim 1, wherein the diameter of said flow uniforming member is smaller by 3 to 25 mm than the diameter of the innermost row of nozzles.
- 3. A melt spinning apparatus according to claim 1, wherein said flow unforming member is in the form of a cylinder or a truncated cone.
- 4. A melt spinning apparatus according to claim 1, wherein said flow uniforming member is made of a metal.
Priority Claims (1)
Number |
Date |
Country |
Kind |
60-41089 |
Mar 1985 |
JPX |
|
Parent Case Info
This is a continuation of copending application Ser. No. 833,739, filed on Feb. 26, 1986 now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (3)
Number |
Date |
Country |
46-34926 |
Oct 1971 |
JPX |
53-9293 |
Apr 1978 |
JPX |
57-161113 |
Oct 1982 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
833739 |
Feb 1986 |
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