Spinning beam

Patent metadata

Field	Value
Publication number	US-12553153-B2
Application number	US-202118006403-A
Country	US
Kind code	B2
Filing date	Jul 21, 2021
Priority date	Jul 22, 2020
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

The present disclosure relates to a spinning beam for producing hollow fiber membranes in a phase inversion process, and to a process using the spinning beam.

First claim

The invention claimed is:

1 . A spinning unit comprising:
a spinning beam comprising a plurality of honey combed structures, each honeycombed structure comprising six hexagonal spinneret seats arranged around a central hexagonal feed unit, the feed unit comprising, on each of its six faces, both a feed port for a polymer solution and a feed port for a center fluid, the feed unit being configured to receive a supply pipe comprising ducts for the polymer solution and ducts for the center fluid which correspond to the feed ports for the polymer solution and the feed ports for the center fluid, respectively, of the feed unit; and the feed unit comprising an electrical heating element arranged in its base, a plurality of spinnerets for producing hollow fiber membranes, each spinneret comprising a spinneret body having a hexagonal outer contour and an axially symmetric central cavity and comprising a duct for a polymer solution, a duct for a center fluid, the ducts connecting the central cavity to one of the outer faces of the spinneret body, and an orifice at the bottom of the central cavity; and a spinneret core arranged in the central cavity of the spinneret body, the spinneret body and the spinneret core together defining a circumferential cavity for a center fluid and a circumferential cavity for a polymer solution, the spinneret core comprising one or more ducts for a center fluid connecting the circumferential cavity to a central cavity of the spinneret core; and a capillary connecting the central cavity of the spinneret core to the orifice of the spinneret body; and a regulating screw sealing the top of the central cavity of the spinneret core and being configured to regulate a flow of a center fluid through the spinneret core by partially sealing the one or more ducts for a center fluid when the regulating screw is turned downwards, each spinneret being fastened in a spinneret seat of the spinning beam by self-locking, and a plurality of supply pipes, each supply pipe being fastened in a feed unit of the spinning beam, wherein each spinneret comprises an outer contour and each spinneret seat comprises an inner contour, and wherein the outer contour of each spinneret matches the inner contour of each spinneret seat.

2 . The spinning unit of claim 1 , wherein the supply pipe features a feed pipe for a polymer solution and a feed pipe for a center fluid, the feed pipes being coaxial, the feed pipe for the polymer solution being located inside the feed pipe for the center fluid, and ducts for the polymer solution and ducts for the center fluid being provided at the bottom of the supply pipe for supplying the spinnerets.

3 . The spinning unit of claim 2 , wherein the feed pipe for the center fluid is directly connected to a center fluid reservoir, and the feed pipe for the polymer solution is connected to a polymer solution reservoir via a connecting pipe.

4 . The spinning unit of claim 1 , wherein the spinneret seat comprises an inner wall, and wherein the inner wall tapers towards the bottom of the inner wall.

Assignees

• Gambro Lundia Ab

Inventors

• Wagner Steffen

Classifications

• D10B2505/04

  Filters · CPC title

• D10B2331/30

  polycondensation products not covered by indexing codes D10B2331/02 - D10B2331/14 · CPC title

• D10B2321/12

  polymers of cyclic compounds with one carbon-to-carbon double bond in the side chain · CPC title

• D01F6/94

  of other polycondensation products · CPC title

• D01F6/56

  of polymers of cyclic compounds with one carbon-to-carbon double bond in the side chain · CPC title