Spinning pack with sand filter

Details Spinning pack with sand filter Spinning pack with sand filter

1996-09-09

1998-08-18

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With upstream screen or perforated plate for straining,...

Upstream of multi-orifice shaping die

425 722, 425199, 4253822, D01D 406

Patent

active

057955956

ABSTRACT:
A spinning pack with a sand filter for the melt spinning of thermoplastics, whereby at least one perforated plate with evenly distributed D-shaped holes with slanting openings that taper conically in the direction of flow is placed in the direction of flow in front of and/or behind the sand filter. Spinning packs according to the invention surprisingly give highly uniform distribution and flow of thermoplastic melt through the sand filter.

REFERENCES:
patent: 3888963 (1975-06-01), Orso et al.
patent: 4493628 (1985-01-01), Lenk
patent: 4645444 (1987-02-01), Lenk et al.
patent: 4681522 (1987-07-01), Lenk
patent: 4704077 (1987-11-01), Lenk
patent: 5035595 (1991-07-01), Nakajima et al.
patent: 5346303 (1994-09-01), Starnes, Jr.
patent: 5562930 (1996-10-01), Hills

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