US2891278A - Spinneret - Google Patents

Spinneret Download PDF

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Publication number
US2891278A
US2891278A US584770A US58477056A US2891278A US 2891278 A US2891278 A US 2891278A US 584770 A US584770 A US 584770A US 58477056 A US58477056 A US 58477056A US 2891278 A US2891278 A US 2891278A
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US
United States
Prior art keywords
spinneret
extrusion
orifices
capillaries
filaments
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US584770A
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English (en)
Inventor
Harry M Cook
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DENDAT1250961D priority Critical patent/DE1250961B/de
Priority to NL235774D priority patent/NL235774A/xx
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US584770A priority patent/US2891278A/en
Application granted granted Critical
Publication of US2891278A publication Critical patent/US2891278A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes

Definitions

  • This invention relates to a new and novel spinneret and more particularly to a spinneret having a large number of extrusion orifices especially designed for the evaporative spinning of a large bundle of synthetic textile filaments.
  • a solution such as a N,N-dimethylformamide solution
  • spinning acrylonitrile polymers and copolymersfrom a solution such as a N,N-dimethylformamide solution was that when the polymer was extruded through a large number of closely spaced orifices some of the adjoining filaments would touch and stick together.
  • a common spinneret design arranges the extrusion orifices equally spaced both radially and circumferentially in a series of concentric circles. Such a design does not effectively overcome the twinning problem.
  • An object of the present invention is to provide an improved arrangement of orifices in a spinneret which prevents or greatly eliminates the formation of twinned or stuck filaments. Another object is to provide an improved mounting for the new spinneret to insure uniform filamentation and evenly divided flow to all the orifices in the spinneret. A still further object is to provide means for preventing leakage around the filter elements and to give dependable initial solution flow through the spinneret. Other objects will become apparent as the description of the invention proceeds.
  • a spinneret having a large number, preferably not less than 400, of extrusion capillaries arranged in a plurality of concentric circles, preferably at least 4.
  • the extrusion orifices or capillaries are arranged in the face of the spinneret so that the center of each capillary falls on a separate radial line. In other words, if radii are drawn to each capillary they will differ by a constant central angle, and there will be as many separate radii as there are capillaries.
  • Figure 1 represents a sectional view of a spinneret head assembly incorporating the present invention.
  • Figure l-a is an enlarged view of area A clearly the arrangement of which the invention particularly relates.
  • Figure l is a front view of the spinneret face.
  • Figure 3 is an enlarged broken diagrammatic plan view showing :a radius drawn from the center of the spinneret to each of the extrusion capillaries. This view clearly illustrates that each capillary is at the terminus of a separate radius.
  • 1 represents a conventional spinneret body to which an adapter 2 is firmly secured by threads 16.
  • the spinneret plate 17 is provided with a back support 3 and a front support 4 between which the spinneret plate is held by cap screw 5.
  • the back support 3 is provided with several (feed orifices 14 and a plurality of filter screens 12 and a clamp 13 for holding the filter screens firmly against the back support 3. This assembly is held tightly against the adapter 2 by means of a ring nut 6.
  • the adapter isprovided with internal threads 16a to receive the spinneret body 1. It also is provided with external lugs 18 having a beveled portion 19.
  • the ring nut 6 has aninterrupted flange forming protrusions 20 spaced to receive lugs 18. A twist of about 30 forces the lugs beneath the protrusions 20 with a cam action which assures a tight fit. Escape of fluid between the various parts is prevented by suitable gaskets shown as 7.
  • the spinneret plate 17 is provided with counterbored extrusion orifices 10 which terminate in extrusion capillaries 11 as shown particularly in Figgure l-A.
  • the liquid polymer either as a melt or in the form of a solution is delivered through the body of the spinneret into feed chamber 15 where it is then filtered through screens 12 and passes through the feed orifices 14 through a second filter 8 and finally into the counterbored orifice 10 and through extrusion capillaries 11. After the polymer emerges from these capillaries it is contacted with a suitable fluid for cooling the filaments in the case of melt extrusion or evaporating the solvent in the case of evaporative spinning.
  • Example I A 29% solution of acrylonitrile polymer in N,N-dimethylformamide was prepared and delivered to a spinneret having 1344 extrusion capillaries arranged in 7 concentric circles of 192 capillaries each. Each capillary had a diameter of 0.12 mm. Each circle was separated from an adjacent circle by a distance of 2 mm. The outer circle had a diameter of 146 mm. and the hole spacing was 2.39 mm. The innermost circle hada diameter of 122 mm. and the hole spacing was 2.00 mm.
  • the acrylonitrile in solution was spun at the rate of 200 y.p.-m. to produce a 5260 denier bundle of 1344 filaments or 3.9 denier per filament. After drawing 5.6x and relaxing, the final filament denier was below 1. The quality of the yarn was excellent and was free of stuck or twinned filaments. The rate of spinning production was over 14 lbs. per hour per spinneret.
  • Example I was repeated using a 1080 hole spinneret which was made with 180 holes in each of the 6 concentric circles.
  • the spacing between the holes on the outer circle. were 2.53 mm. and 2.13 mm. on the inner ring.
  • the diameter of the outer circle was 145' mm; and the inner circle 122
  • Each ring was spaced from the adjacent ring by a distance of 213
  • the holes in each successive circle were located on a line 8 from the center line of the spinneret which gave a centrah angular spacing of adjacent radial lines to the holes of about /3",
  • the spinning performance of this spinneret was excellent and produced about 11.3 lbs. per hour of undrawnxfilaments. These were drawn and. relaxed as in Example I to give a denier of about 1' per filament.
  • the yarn so. produced was free, of stuck or twinned filaments and the uniformity of filament size and physical properties were very satisfactory.
  • While the invention is especially adapted to spinning a large bundle of low denier filaments it may also be used to advantage in the production of relatively larger or smaller filaments which after drawing from 2x to 10X may range in the size of from /2 denier up to 12 or 15 denier.
  • the invention is not limited to spinning acryl onitrile' polymers but may be used with cellulose acetate or any synthetic filament which may be spun by evaporative, meltor wet-spinning methods.
  • the spinneret herein described also has the advantage that it provides easy changing of spinneret plates and quick effective" sealing.
  • a spinneret having an annular perforated area containing at least about 400 symmetrically disposed p'erfo rations, the perforations being extrusion orifices located on the circumference of at least four closely spaced concentric circles, each such orifice being located. terminally on a separate radius andeach such radius forming an equal central angle with its adjacent radius and each perforation being substantially equi-distant from adjacent perforations on the same circle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US584770A 1956-05-14 1956-05-14 Spinneret Expired - Lifetime US2891278A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DENDAT1250961D DE1250961B (es) 1956-05-14
NL235774D NL235774A (es) 1956-05-14
US584770A US2891278A (en) 1956-05-14 1956-05-14 Spinneret

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US584770A US2891278A (en) 1956-05-14 1956-05-14 Spinneret

Publications (1)

Publication Number Publication Date
US2891278A true US2891278A (en) 1959-06-23

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ID=24338713

Family Applications (1)

Application Number Title Priority Date Filing Date
US584770A Expired - Lifetime US2891278A (en) 1956-05-14 1956-05-14 Spinneret

Country Status (3)

Country Link
US (1) US2891278A (es)
DE (1) DE1250961B (es)
NL (1) NL235774A (es)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041894A (en) * 1959-12-17 1962-07-03 Ii John A Cupler Spinnerette production method
DE1193197B (de) * 1961-03-07 1965-05-20 Ethicon Inc Mehrlochspinnduese zum Verspinnen von Collagenfaserdispersionen
US3209402A (en) * 1962-03-07 1965-10-05 Celanese Corp Apparatus for producing multicom-ponent filaments and yarns
US3245112A (en) * 1963-06-27 1966-04-12 Du Pont Metal to screen seal for spinnerets
US3461493A (en) * 1967-02-16 1969-08-19 Vickers Zimmer Ag Nozzle for plastic melts
US3480995A (en) * 1966-04-09 1969-12-02 Barmag Barmer Maschf Sealing device for the connecting point between feeding member and tool in extrusion presses
US5387097A (en) * 1991-12-06 1995-02-07 Akzo Nv Self-sealing spin pack
DE4422565C2 (de) * 1994-06-28 2000-10-19 Bayer Ag Verfahren und Vorrichtung zum Trockenspinnen synthetischer Polymerer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5527178A (en) * 1993-05-24 1996-06-18 Courtaulds Fibres (Holdings) Limited Jet assembly
AT402738B (de) * 1993-07-28 1997-08-25 Chemiefaser Lenzing Ag Spinndüse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1405132A (en) * 1920-01-26 1922-01-31 Pennsylvania Company For Insur Safety means for discharge nozzles
US1611354A (en) * 1925-12-16 1926-12-21 Leuchs Karl Method of and apparatus for manufacturing artificial silk
US1883423A (en) * 1929-01-02 1932-10-18 Celanese Corp Apparatus for forming filaments
DE820948C (de) * 1944-12-16 1951-11-15 Spinnfaser A G Spinnduese fuer die Herstellung kuenstlicher Faeden
DE897142C (de) * 1948-10-02 1953-11-19 Heraeus Gmbh W C Spinnduese

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1405132A (en) * 1920-01-26 1922-01-31 Pennsylvania Company For Insur Safety means for discharge nozzles
US1611354A (en) * 1925-12-16 1926-12-21 Leuchs Karl Method of and apparatus for manufacturing artificial silk
US1883423A (en) * 1929-01-02 1932-10-18 Celanese Corp Apparatus for forming filaments
DE820948C (de) * 1944-12-16 1951-11-15 Spinnfaser A G Spinnduese fuer die Herstellung kuenstlicher Faeden
DE897142C (de) * 1948-10-02 1953-11-19 Heraeus Gmbh W C Spinnduese

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041894A (en) * 1959-12-17 1962-07-03 Ii John A Cupler Spinnerette production method
DE1193197B (de) * 1961-03-07 1965-05-20 Ethicon Inc Mehrlochspinnduese zum Verspinnen von Collagenfaserdispersionen
US3209402A (en) * 1962-03-07 1965-10-05 Celanese Corp Apparatus for producing multicom-ponent filaments and yarns
US3245112A (en) * 1963-06-27 1966-04-12 Du Pont Metal to screen seal for spinnerets
US3480995A (en) * 1966-04-09 1969-12-02 Barmag Barmer Maschf Sealing device for the connecting point between feeding member and tool in extrusion presses
US3461493A (en) * 1967-02-16 1969-08-19 Vickers Zimmer Ag Nozzle for plastic melts
US5387097A (en) * 1991-12-06 1995-02-07 Akzo Nv Self-sealing spin pack
DE4422565C2 (de) * 1994-06-28 2000-10-19 Bayer Ag Verfahren und Vorrichtung zum Trockenspinnen synthetischer Polymerer

Also Published As

Publication number Publication date
NL235774A (es)
DE1250961B (es) 1967-09-28

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