Method and spinning apparatus having a multiple-temperature cont

Details Method and spinning apparatus having a multiple-temperature cont Method and spinning apparatus having a multiple-temperature cont

1997-02-06

1999-02-02

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling heat transfer with molding material

2641761, 425143, 425144, 4253782, 4253791, 4253822, 425464, B29C 4792, D01D 109, D01D 508

Patent

active

058660500

ABSTRACT:
A method and apparatus for spinning filaments of a polymeric material includes a first temperature control arrangement for heating a spin pack to a first predetermined reference temperature greater than the predetermined polymer inlet temperature such that the temperature across a polymer filter holder and the spinneret plate in the spin pack is substantially uniform, whereby the temperature of the filaments emanating from the spinneret plate is substantially uniform. A plate assembly having at least one polymer flow passage therein is disposed between the outlet of the pump and the inlet of the spin pack. A second temperature control arrangement for independently controlling the temperature of the plate assembly to a second predetermined reference temperature is provided. The second predetermined reference temperature is selectable to a temperature above, equal to, or below the predetermined polymer inlet temperature, whereby the temperature of polymer conveyed through the polymer flow passage in the plate assembly is selectably controllable to a predetermined polymer temperature lying within a predetermined range of the second predetermined reference temperature.

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