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Publication numberUS2416291 A
Publication typeGrant
Publication dateFeb 25, 1947
Filing dateNov 14, 1942
Priority dateNov 14, 1942
Publication numberUS 2416291 A, US 2416291A, US-A-2416291, US2416291 A, US2416291A
InventorsDetwiler George T, Kulp Maurice P, Merion Howard D, Moss Jr Sanford A
Original AssigneeAmerican Viscose Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method and apparatus for spinning synthetic shapes
US 2416291 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Feb. 25, 1947. 6. TL DETWILER ETAL 2, METHODS AND APPARATUS FOR SPINNING SYN'L'I'IE'I'IC SHAPES Filed Nov. 14, 1942.

GEORGE 7. DETW/LEE NAUP/CE A KULP JANFMJA. M056} Je How/m0 0. Mew/0N Patented Feb. 25,1947

UNITED' STATES PATENT OFFICE METHOD AND APPARATUS FOR SPINNING SYNTHETIC SHAPES George T. Detwiler, Chester, Maurice P. Kulp, Linwood, Sanford A. Moss, J r., Ridley Park, and Howard D. Merion, West Chester, Pa., assignors to American Viscose Corporation, Wilmington, Del., a corporationof Delaware Application November 14, 1942, Serial No. 465,530

7 and the like, is extruded through a spinneret or jet into a liquid bath where the desired shaped article is formed. In the usual practice, a number of spinnerets are positioned in the same bath and the bath is continually circulated in order to maintain its composition uniform. In circulating the bath,- currents and turbulence are created which act adversely on the freshly formed shaped article in the region adjacent the face of the spinneret and subject it to strains which affect its dyeing properties. The shaped article will dye unevenly and often with a barre effect. It is found that this actionof the currents and turbulence in the bath can be eliminated by protecting the viscose cellulose acetate, and the like as it emerges from the spinning jet and is changing from a liquid to a, solid. This can be accomplished by providing the spinneret with an adjutage or sleeve which projects from the spinneret in the direction in which the shaped article is spun. An adjutage or sleeve having an internal diameter of from one-half to twice the diameter of the face of the spinneret and a length of from one to four times the diameter. of the face of the spinneret gives a satisfactory result. To insure the presenceof spinning bath liquid in the region adjacent the face of the spinneret, means may be provided for permitting spinning bath liquid to flow into the sleeve member without creating turbulence in the region adjacent the face of the spinneret.

This invention has for its principal object to provide improvements in methods and apparatus for spinning synthetic shaped articles where the material to comprise the article is extruded into a liquid bath.

A further object of the invention is to provide improvements in apparatus for spinning synthetic shaped articles into a liquid bath, comprising means for protecting the article being spun from turbulence and currents in. the bath while the article is still in a plastic or nascent state. a I

Other objects and advantages of the invention 6 Claims.

2 will be apparent from the'following description and accompanying drawing.

In the drawing, Figure 1 is a front elevational view of a form of apparatus embodying the invention and disposed in normal operating position in a spinning bath, the receptaclefor which is shown in section.

Figure 2 is a sectional view taken on the line IIII in Figure 1.

Figure 3 is a front elevational view of a modification of the invention.

Figure 4 is a sectional view taken on the line IV-IV in Figure 3.

Figure 5 is a front elevational view of modification of the invention.

Figure 6 is a sectional view taken on the line VI-VI in Figure 5.

Figure 7 is a front elevational view of'a further modification of the invention.

Figure 8 is a sectional view taken on the line VIII-VIII in Figure 7. v

Referring to Figures 1 and 2 of the drawing, the reference character I indicates a rounder which is adapted to be attached at one end to a suitable metered supply of spinning solution. A spinneret 3 is attached to the other end of the rounder by the jet union indicated generally by reference character}. The union comprises a split male part Sand a female part 4. The means for protecting the shape being spun while it is still in a nascent or plastic state comprises the collar member 6 which is adapted to be attached to the female part of the jet union and which is formed witha central chamber 12. A sleeve member or adjutage 1 is fitted to the collar member and is provided with a tapered central bore 8 leading to the central chamber and in line with the axis of the spinneret. The collar member is provided with passageways I I. communicating with the central chamber I2 which permit spinning bath inreceptacle R to flow into the region adjacent the face of the spinneret. Inwardly extending lugs 9 are formed. on the collar mem-' ber which cooperate with the outwardly extend: ing lugs H] on the female part of the jet union to form a bayonet joint whereby the collar and the sleeve member may be readily attached to the spinneret.

Referring to the modification of the invention another 25. The means for protecting the shaped article i being spun while it is still in a nascent or plastic state comprises concentric sleeve or adjutage members 26 and 21 which slip over and engage i the side wall of the spinneret. The sleeve members 26 and 21 are rotatable relative to each other and are provided with longitudinally ex- 1 tending slots 30 and 3i respectively which may i be placed in alignment to permit the sleeves to be applied to or removed from the spinneret 5 without interrupting the spinning operation. Aligned slots or openings 28 and 29 are formed in the sleeve members adjacent the face of the 1 spinneret which extend in a direction transverse to theaxis of the sleeve members and permit the spinning bath to flow into the region adjacent the I i face of the spinneret.

Referring to the modification of the invention shown in Figures 5 and 6 of the drawing, refer- The jet union comprises a split male The means for The protecting member is' clamped to the female part of the jet union, with the cylindrical 1 portion in line with the spinneret. The collar 45 has a conical shaped central chamber 4'? which is adapted to receive and engage the conical j shaped portion of the protecting member.- The collar is provided with inwardly extending lugs 5| which cooperate with the outwardly extending lugs 50 on the female partof the jet union to form a bayonet joint wherebythe collar and prof tecting'member are clamped to the spinneret.

Passageways 49 are formed in the collarmember which permit spinning bath to fiow into the region adjacent the face of the spinneret.

Referringto Figures '7 and 8 of thedrawing wherein a further modification of the invention Pis' shown, reference character 60 indicates a 1 rounder, one end of which is adapted to be attached to a metered supply of spinning solution.

A spinneret 64 is attached to the other end of i the rounder by the jet union indicated generally by reference character 6|. .The jetunion comprises a split male part 62 and a femalepart 53. g v The means for protecting the shaped article being @spun while it is still in, the nascent or plastic state comprises themembers 65 and 56 pivotally j mounted on the pins 61 and 68 which extend in parallel relation throughthe female part of the i jet union. The members 65 and 66 are provided 1 with a central bore 69 leading to the conical cross currents in the bath while the filaments- 4 and 66 are spread apart by pivoting on their supporting pins 61 and 68 to permit the thread or yarn that is first formed to be drawn through them. Then the members 65 and 66 are brought together and are retained by the latch member 1 l. The parts of the apparatus that'come in contact with the spinning bath and the spinning solution are made of material that is chemically resistant to the spinning bath and the spinning solution.

It is readily seen that this invention is applicable to the conventional forms of spinnerets that are used in forming synthetic shaped articles in'a liquid spinning bath. Thearticle is protected as it emerges from the face of the spinneret and is still in a plastic or nascent state from cross currents and turbulence in the spinning bath which would strain it and afiect its physical characteristics.

It is to be understood that this invention is applicable to the spinning of all shaped articles such as yarns, threads, filaments, ribbons, and films where a solution of the material to comprise the shape, such as viscose, cuprammonium, cellulose acetate, resin solution and the like, is extruded into a liquid bath.

While preferred embodiments of the invention have been shown, it is to be understood that changes and variations may be made without departing from the spirit and scope of the invention as defined by the appended claims.

What we claim is:

1. The method of forming artificial filaments comprising extruding a solution of the material to be formed into filaments into a liquid coagulating bath, inducing flow of a portion of the liquid in the bath adjacent the filaments along with the filaments solely by virtue of the travel of such filaments through the bath, and protecting the filaments extruded into the bath from are still in a nascent state so that the induced flow is rendered nonturbulent and substantial ly stream-lined until the filaments are sufiiciently solid to resist the straining action of such cross currents.

shapedchamber T0into which the spinneret ex- 1 tends. One-half of the central bore is formed in each of'the members with the center line lying in the plane of the meeting faces of the members when they are in operative position. A central 2- bore l2,'of relatively large diameter, is formed in the end of the members and 66 adjacent the spinneret which communicates with the conical i chamber 1c. This permits spinning bath liquid to flow into the conical'chamber in the region adjacent the face of the spinneret. The mem 2. An apparatus for spinning artificial filaments under submerged conditions in a liquid coagulating bath comprising a rounder, a spinneret having orifices through which material to be coagulated is extruded, a jet union holding the spinneret on the rounder, a channel-defining means comprising two sections movable with respect to each other, each section being pivotally supported by the jet union,said channeldefining means being disposed about the spinneret and'extending from behind the spinneret to a substantial distance in advance thereof, said means providing a channel in alignment with the spinneret, said channel having'a small size such that, at all points throughout its length in ad.- vance of the spinneret face,-its diameter is not substantially greater than twice the diameter of the spinneret face and tapering to an internal diameter atleast as small as the diameter of the spinneret face in a transverse plane a short distance in advance of the spinneret face to provide a path of travel of reduced area for the freshly extruded material, and passageways be: tween said means and the jet union back of the spinneret fac communicating with the channel to permit the coagulating liquid to flow into the same back of the face of the spinneret.

3. An apparatus for spinning artificial filaments under submerged conditions in a liquid '5 coagulating bath comprising a normally stationary rounder, a spinneret having orifices through which material to be coagulated is extruded, a jet union for securing the spinneret to the rounder, stationary protective means releasably mounted on and being supported by the jet union in predetermined position relative to the spinneret, said protective means being disposed about the spinneret extending from behind the spinneret face to a substantial distance in advance thereof, said protective means providing a channel in alignment with the spinneret, said channel having a small size such that, at all points throughout its length in advance of the spinneret face, its diameter is not substantially greater than twice the diameter of the spinneret face and tapering to an internal diameter at least as small as the diameter of the spinneret face in a transverse plane a short distance in advance of the spinneret face to provide a path of travel of reduced area for the freshly extruded material, passageways between the jet union and protecting means and communicating with the channel to permit tht coagulating liquid to flow into the same back of the face of the spinneret, said protective means and spinneret being entirely submerged in a spinning bath so that the coagulating liquid is free to circulate from the bath through the passageways and th protective means past the spinneret and back to the bath.

4. An apparatus for spinning artificial filaments under submerged conditions in a liquid coagulating bath comprising a rounder, a Spinneret having orifices through which material to be coagulated is extruded, a jet union holding the spinneret on the rounder, a sleeve member disposed about the spinneret extending from behind the spinneret to a substantial distance in advance thereof, said sleeve member providing a channel in alignment with the spinneret, said channel having a small size such that, at all points throughout its length in advance of the spinneret face, its diameter is not substantially greater than twice the diameter of the spinneret face and tapering to an internal diameter at least as small as the diameter of the spinneret face in a transverse plane a short distance in advance of the spinneret face to provide a path of travel of reduced area for the freshly extruded material, and a collar member releasably supported on the jet union and being disposed about the sleeve member for supporting the sleeve member in predetermined position relative to the spinneret, said collar member being provided with passageways around the jet union back of the spinneret face and communicating with the channel of said sleeve member to permit the coagulating liquid to flow into the same back of the spinneret face.

5. An apparatus for spinning artificial filaments under submerged conditions in a liquid coagulating bath comprising a rounder, a spinneret having orifices through which material to be coagulated is extruded, a jet union holding the spinneret on the rounder, a collar member releasably supported on the jet union extending from behind the spinneret to a substantial distance in advance thereof and provided with a chamber adapted to receive the spinneret, a sleeve member carried by the collar member in predetermined position relative to the spinneret and having a channel forming a continuation of said chamber in alignment with the spinneret, said channel having a small size such that, at all points throughout its length in advance of the spinneret face, its diameter is not substantially greater than twice the diameter of the spinneret face and tapering to an internal diameter at least as small as the diameter of the spinneret face in a transverse plane a short distance in advance of the spinneret face to provide a path of travel of reduced area for the freshly extruded material, said collar member being provided with passageways around the jet union back of the spinneret face and communicating with the chamber of the collar member adapted to receive the spinneret, to permit the coagulating liquid to now into the same back of the spinneret face.

6. An apparatus for spinning artificial filaments under submerged conditions in a liquid coagulating bath comprising a rounder, a spinneret having orifices through which material to be coagulated is extruded, a jet union holdingthe spinneret on the rounder, a channel-defining means comprising two sections separable from each other, each section, being releasably mounted on and being supported by the jet union in predetermined position relative to the spinneret, said channel-defining means being disposed about the spinneret and extending from behind the spinneret to a substantial distance in advance thereof, said means providing a channel in alignment with the spinneret, said channel having a small size such that, at all points throughout its length in advance of the spinneret face, its diameter is not substantially greater than twice the diameter of the spinneret face and tapering to an internal diameter at least as small as the diameter of the spinneret face in a transverse plane a short distance in advance of the spinneret face to provide a path of travel of reduced area for the freshly extruded material, and passageways between said means and the jet union back of the spinneret face communicating with the channel to permit the coagulating liquid to flow into the same back of the face of the spinneret.

GEORGE T. DETWILER.

MAURICE P. KULP. SANFORD A. MOSS, JR. HOWARD D. MERION.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS FOREIGN PATENTS Country Date British 1907 British July 19, 1928 British June 22, 1933 Netherlands Aug. 17, 1923 Number Number

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2872701 *Nov 14, 1955Feb 10, 1959American Viscose CorpArtificial yarn producing apparatus
US2905968 *Sep 7, 1955Sep 29, 1959American Enka CorpViscose spinning device
US2964788 *Jun 20, 1958Dec 20, 1960American Enka CorpTube spinning assembly
US3051986 *Jan 9, 1959Sep 4, 1962Phrix Werke AgSpinnerett assembly
US3968086 *Mar 13, 1975Jul 6, 1976Atara CorporationDouble funnel device for oxygenating sewage
US4744932 *May 31, 1985May 17, 1988Celanese CorporationProcess for forming a skinless hollow fiber of a cellulose ester
DE1148694B *Oct 14, 1959May 16, 1963Onderzoekings Inst ResNassspinnvorrichtung fuer kuenstliche Faeden
Classifications
U.S. Classification264/180, 425/70, 264/188, 261/77, 264/200
International ClassificationD01D5/06
Cooperative ClassificationD01D5/06
European ClassificationD01D5/06