US3280424A - Apparatus for the manufacture of synthetic threads - Google Patents

Apparatus for the manufacture of synthetic threads Download PDF

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Publication number
US3280424A
US3280424A US347568A US34756864A US3280424A US 3280424 A US3280424 A US 3280424A US 347568 A US347568 A US 347568A US 34756864 A US34756864 A US 34756864A US 3280424 A US3280424 A US 3280424A
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United States
Prior art keywords
spinning
filament
cooling chamber
spinneret
bundle
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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
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US347568A
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English (en)
Inventor
James W I Heijnis
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Akzona Inc
Original Assignee
American Enka Corp
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Publication date
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Publication of US3280424A publication Critical patent/US3280424A/en
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    • 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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys

Definitions

  • Melt spinning apparatus adapted with a cooling chamber for the freshly spun filaments are known.
  • the filaments are spun directly into the cooling chamber and therein contacted by a flow of air introduced into the chamber in a direction perpendicular to the spinning direction. It is desired to adjust the rate of air flow through a bundle of the spun filaments to be constant throughout the filament pattern. Variations in the cooling air flow are detrimental in that such a condition cause final, cooled threads obtained from a given bundle to differ significantly from one another in denier and diameter.
  • Spinning apparatus having cooling chambers heretofore available are arranged such that the spinning chamber surrounds the spinneret(s) with the front wall thereof and two side walls thereof which are perpendicular to said front wall extending parallel to the direction of spinning.
  • the front wall of such spinning chambers is provided over its entire surface with openings which connect with an air-supply system.
  • a further object of the present invention is to provide an improved filament spinning apparatus having a spun lament cooling chamber advantageously adapted for removal and/ or exchange of the spinning nozzle without the need of effecting a shifting of the entire cooling chamber.
  • the present invention provides a filament spinning apparatus consisting of at least one spinneret provided with a plurality of orifices for spinning a bundle of filaments and a cooling chamber positioned to at least partially surround said filament bundle being spun by said spinneret.
  • the cooling chamber has a front wall and two side walls with said front wall extending essentially parallel to the path of travel of filaments in said filament bundle and being provided over its entire surface with openings for passage of air through same.
  • the side walls are positioned essentially parallel to said filament path of travel and are perpendicular to said front wall.
  • Means are also provided for supplying air communicating with said front wall of said cooling chamber, and at least two resistance members are provided on opposite sides of said filament bundle with each resistance member extending in a direction parallel to the filament path of travel and are adapted to be fixedly positioned within said cooling cahrnbe-r on a line between said'side walls and said filament bundle.
  • the distance from the path of travel of the filament in said filament bundle nearest thereto is at most five times the smallest distance between adjacent orifices in said spinneret.
  • each resistance member is so positioned during normal spinning that the distance therefrom to said sides of the corresponding group of spinning orifices in the spinneret is about one to two times the smallest distance between the successive spinning orifices of the spinneret.
  • the particular embodiments of the resistance members may vary.
  • the resistance members preferably function as auxiliary side walls and are characterized by an area which is at least as great as, and preferably greater than,
  • the resistance members may be of a continuous .or discontinuous surface and, in embodiments wherein the surface of the resistance member is discontinuous, e.g., perforated, the openings therein are sufiiciently small so as not to substantially disrupt the flow pattern of air passing traverse to said member.
  • the air-contacting surface defined by the resistance member is continuous and, in such embodiments, the surfaces of the resistance member partitions preferably extend in the direction of air flow over a smaller distance than do the side walls of the cooling chamber.
  • the invention contemplates, however, embodiments wherein the side walls of the cooling chamber are positioned such that they also serve as the resistance members.
  • the invention also contemplates an embodiment wherein the resistance elements define areas smaller than that of the filament bundle in a plane parallel to said cooling chamber side Walls.
  • the resistance members suitably may consist of one or more steel Wires having approximately the same dimensions as the synthetic threads being formed in the spinning operation. Screens formed of such wires are also contemplated.
  • the resistance members are movable from the spinning position to some spinning-in position farther removed from the adjacent spinner-ct.
  • the spinning-in operation does not give rise to dificulties and the cooling chamber advantageously may be adapted to different spinnerets and conditions.
  • all of the resistance memebrs consist of continuous partitions which are alidably but sealingly attached to the front wall, which is generally in the form of a conventional screen pack, of the cooling chamber.
  • the resistance members act to reduce the differences between the rate of air flow at the sides and in the middle of the filament bundle to a value which allows filaments of substantially uniform denier and diameter to be obtained.
  • the apparatus according to the invention makes it possible to spin uniform threads having a denier lower than 1.5, namely 1.2 and lower, which previously has not been possible when using previously known cooling chambers.
  • the invention contemplates embodiments of the spinning apparatus provided with a plurality of spinnerets, each spinneret being adapted with a pair of resistance members.
  • a single esistance member may serve as the member for two spinnerets lying on each side thereof.
  • spinneret is intended to refer'to a spinning nozzle having a single group of closely lying orifices or the area of a spinning nozzle provided with a plurality of distinct groups of closely lying orifices in which is located one of said distinct groups.
  • the resistance member partitions extend substantially parallel to the short sides of the rectangle formed by the group of spinning orifices.
  • each spinneret having a group of spinning orifices may be located between two separate resistance members and the members may be moved pairwise and in a direction approximately transsmall.
  • the spinning-in operation does not give rise to problems and the cooling chamber has flexibility in terms of usage with spinnerets of difiering design.
  • the presence of'two movable resistance member partitions between two adjacent groups of spinning orifices ensures that the distance between said distinct groups of spinning orifices is not particularly While in the spinning-in position, the two movable outer resistance member partitions of the assembly may be placed practically against the adjacent side Walls of the cooling chamber. In this position, the distance from such two movable outer patri-tions to the sides of the corresponding group(s) of spinning orifices preferably is at least ten times the distance between the successive spinning orifices in a group.
  • the invention contemplates embodiments wherein the spinning nozzle provides a round or a rectangular bundle of filaments. Spinning means are preferred, however, which spin a rectangular bundle of filaments.
  • FIGURE 1 is a schematic plan view in cross section of a spinning apparatus of the invention having a cooling (FIGURE 2 chamber for one spinneret;
  • FIGURE 2 is a schematic view on an enlarged scale of the group of spinning orifices in the spinneret shown in FIGURE 1;
  • FIGURE 3 is a schematic view in cross section of an apparatus of the invention having a cooling chamber for three spinnerets; and V FIGURE 4 is a partial schematic view of a different embodiment of the apparatus of the invention having a cooling chamber for one spinneret assembly.
  • FIGURE 1 the numeral 1 designates a front wall of the cooling chamber consisting of a screen pack. Positioned perpendicular to front wall 1 are side walls 2 and 3. Between side walls 2 and 3 and parallel to front wall 1 is a schematically shown rectangular bundle of filaments 4. Filament bundle 4 is formed by spinneret 4' located above same and represented by dotted lines. Spinneret 4' is provided with a group of spinning orifices 11 Parallel to side walls 2 and adjacent each of the short sides of rectangular filament bundle 4, are two resistance members in the form of partitions 5 and 6, respectively, which members are sealingly attached to front wall 1. Behind, and communicating with, front wall 1 is air supplymeans 39. The direction of flow of air from supply means 30 for cooling filament bundle 4 is indicated by arrow A.
  • Spinning-in positions for partitions S and 6 are drawn as dotted lines. In such positions they are practically against sidewalls 2 and 3, respectively.
  • Partitions 5 and 6 may be moved over a distance B to spinning positions which are indicated by the solid lines.
  • the displacement over distance B of partitions 5 and 6 may be effected with the aid of a set of guides 7 and 8, respectively, by which members 5 and 6 are supported, said guides preferably being located on the outside of the cooling chamber.
  • Partitions 5 and 6 are displaced by means of a system of coupled rods 9 and 10, respectively, which rods are provided with means not shown for fixing same in the desired position.
  • the distance from partitions 5 and 6 to be correspondingly adjacent sides of filament bundle 4 is at most five times, preferably approximately once to twice, the smallest distance between the successive spinning orifices 11.
  • FIGURE 2 is a view on a larger scale of the substantially rectangular pattern of spinning orifices of spinneret 4' showing spinning orifices 11.
  • Each row of orifices 11 parallel to the long side of the rectangular pattern contains about 72 spinning orifices 11 which are spaced apart at intervals of about 4.5 millimeters.
  • the overall pattern contains 7 of these rows, which rows are spaced apart at intervals of about 5 millimeters.
  • the distance from each of partitions 5 and 6 to the correspondingly adjacent sides of the pattern of orifices preferably is one to twice the distance of 4.5 millimeters, i.e., 4.5 to 9 millimeters.
  • the cooling chamher is adapted for cooling three schematically shown rectangular bundles of filaments 13, 14 and 15 formed by spinnerets 13', 14 and 15, respectively, positioned above and shown as dotted lines.
  • the direction of flow of the cooling air is again indicated by arrows A.
  • Each of the filament bundles 13, 14 and 15 are located between two separate pairs of resistance member partitions 16-17, 18-19, and 20-21, respectively, which partitions may be moved (by means not shown) over the distances B transverse to the direction of flow of the cooling air from spinning positions (solid lines) to spinning-in positions (broken lines).
  • FIGURE 4 again like numerals refer to like elements as shown in FIGURE 1.
  • the cooling chamber is adapted for cooling a single schematically shown substantially rectangular bundle of filaments 4.
  • side walls 2 and 3 themselves serve as resistance members and preferably may be displaced over a distance B from the spinning position (solid lines) to the spinning-in position (broken lines) by means not shown.
  • a filament spinning apparatus which comprises at least one spinneret provided with a plurality of orifices for spinning a bundle of filaments, a cooling chamber positioned to at least partially surround said filament bundle being spun by said spinneret, said cooling chamber having a front wall and two side walls, said front wall extending essentially parallel to the path of travel of filaments in said filament bundle and being provided over its entire surface with openings for passage of air through same, said side walls being positioned essentially parallel to said filament path of travel and being essentially perpendicular to said front wall, means for supplying air communicating with said front wall of said cooling chamber, and at least two resistance members on opposite sides of said filament bundle adapted for movement relative thereto, each resistance member extending in a direction parallel to said filament path of travel and being adapted to be fixedly positioned within said cooling chamber on a line between said side Walls and said filament bundle at a distance from the path of travel of the filament in said filament bundle nearest thereto of at most five times the smallest distance between adjacent orifices in said spinneret.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US347568A 1963-02-27 1964-02-26 Apparatus for the manufacture of synthetic threads Expired - Lifetime US3280424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL289560 1963-02-27

Publications (1)

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US3280424A true US3280424A (en) 1966-10-25

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ID=19754460

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US347568A Expired - Lifetime US3280424A (en) 1963-02-27 1964-02-26 Apparatus for the manufacture of synthetic threads

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US (1) US3280424A (it)
BE (1) BE643515A (it)
DE (1) DE1241036B (it)
ES (1) ES296192A1 (it)
GB (1) GB1016627A (it)
LU (1) LU45501A1 (it)
NL (1) NL289560A (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248581A (en) * 1979-09-05 1981-02-03 Allied Chemical Corporation Spinnerette
US4529368A (en) * 1983-12-27 1985-07-16 E. I. Du Pont De Nemours & Company Apparatus for quenching melt-spun filaments
EP3715518A1 (en) * 2019-03-29 2020-09-30 Ramina S.R.L. Plant for producing non-woven fabric
US20220403556A1 (en) * 2021-06-21 2022-12-22 Fratelli Ceccato Milano S.R.L. Multi-row coaxial melt-blown system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2940122A (en) * 1953-11-13 1960-06-14 Du Pont Melt spinning apparatus with pivotally mounted blowbox
US2947029A (en) * 1955-02-15 1960-08-02 American Enka Corp Tilting blow box
US3067459A (en) * 1959-12-16 1962-12-11 Du Pont Quenching chamber
US3070839A (en) * 1958-12-24 1963-01-01 Du Pont Controlled quenching apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT222793B (de) * 1938-08-09 1962-08-10 Du Pont Verfahren und Vorrichtung zum Verspinnen von geschmolzenen organischen, fadenbildenden Massen
AT191070B (de) * 1955-02-15 1957-08-10 Algemene Kunstzijde Unie Nv Vorrichtung zur Herstellung von Kunstfäden nach dem Schmelzspinnverfahren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2940122A (en) * 1953-11-13 1960-06-14 Du Pont Melt spinning apparatus with pivotally mounted blowbox
US2947029A (en) * 1955-02-15 1960-08-02 American Enka Corp Tilting blow box
US3070839A (en) * 1958-12-24 1963-01-01 Du Pont Controlled quenching apparatus
US3067459A (en) * 1959-12-16 1962-12-11 Du Pont Quenching chamber

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248581A (en) * 1979-09-05 1981-02-03 Allied Chemical Corporation Spinnerette
US4529368A (en) * 1983-12-27 1985-07-16 E. I. Du Pont De Nemours & Company Apparatus for quenching melt-spun filaments
EP3715518A1 (en) * 2019-03-29 2020-09-30 Ramina S.R.L. Plant for producing non-woven fabric
US20220403556A1 (en) * 2021-06-21 2022-12-22 Fratelli Ceccato Milano S.R.L. Multi-row coaxial melt-blown system

Also Published As

Publication number Publication date
ES296192A1 (es) 1964-03-16
NL289560A (it)
BE643515A (it) 1964-05-29
DE1241036B (de) 1967-05-24
GB1016627A (en) 1966-01-12
LU45501A1 (it) 1964-04-24

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