US3667886A - Man-made filament spinneret and extruder head - Google Patents

Man-made filament spinneret and extruder head Download PDF

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Publication number
US3667886A
US3667886A US851800A US3667886DA US3667886A US 3667886 A US3667886 A US 3667886A US 851800 A US851800 A US 851800A US 3667886D A US3667886D A US 3667886DA US 3667886 A US3667886 A US 3667886A
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US
United States
Prior art keywords
spinneret
extruder head
rectangular
arcuate
plate
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Expired - Lifetime
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US851800A
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English (en)
Inventor
Charles Gauthier
Jean-Marie Vincent
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CTA COMP IND TEXTILES
CTA-COMPAGNIE IND DE TEXTILES ARTIFICIELS ET SYNTHETIQUES
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CTA COMP IND TEXTILES
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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
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes

Definitions

  • This invention relates to molding devices and particularly filament forming devices including an extruder head spinneret.
  • spinnerets are often made of a ductile material which may become deformed by the stresses exerted through the pressure of a pump or other device forcing the material to be extruded through the device. Moreover, the cost of these spinnerets is relatively high, particularly when one considers that a major part of the metal, name ly the walls and marginal portions surrounding and perforated zone, are not perforated and thus the eiiiciency of the device is reduced when compared to other spinneret forms wherein the major portion of the metal forming the spinneret is perforated.
  • the present invention is the result of continuing industry efforts directed at producing a spinneret at reduced cost and greater efliciency.
  • the primary object of the present invention is to overcome the disadvantages of prior art rectangular spinnerets.
  • Another object of this invention is to provide a rectangular spinneret in which a major portion of the plate forming the material is perforated and only a very small portion of the plate about its peripheral edge is provided for attaching the spinneret to the extruder head.
  • Still another object of this invention is to provide a spinneret which may -be easily constructed and readily attached to the extruder head.
  • a still further object of this invention is to provide an extruder head having an opening with arcuate portions along the periphery thereof for mating with the arcuate marginal edge of the spinneret and an arcuate clamping member for mating with the marginal edges of the spinneret and clamping them to the extruder head.
  • Yet another object of this invention is to provide an extruder head which may be simply constructed by employing an annular chamber with a rectangular portion thereof being open so that the extruder head presents an arcuate opening for the spinneret to be attached thereto.
  • the present invention includes a spinneret in the form of metallic foil whose central perforated zone is surrounded by a peripheral zone which may be affixed to the opening of the extruder head in a fluid-tight relationship, and characterized in that in any area of the spinneret, the major part at least of the peripheral zone presents substantially the same curvature as the perforated zone adjacent thereto.
  • a thin rectangular metal plate constitutes the base stock for the spinneret of the present invention.
  • the plate is of a thickness at least ten times less than the width of the plate and preferably 20 to several hundred times less than this width.
  • the metal plate is bent in one direction, preferably the width of the plate such that in looking at a cross-section taken along a line perpendicular to the major dimension of the rectangular plate, the plate will have an arcuate configuration.
  • the plate may be bent in the length-wise direction, but this requires a larger extruding head and is less preferable.
  • the plate may be bulged, i.e., presenting a curve in more than one direction, but this configuration is less preferable since it increases the manufacturing costs of the extruder head and the spinneret.
  • the peripheral zone of the spinneret which frames the perforated zone is disposed substantially in the plane or on the curved surface, or approximately in the plane or curved surface of the perforated portion of the spinneret, Without forming an angle or significant change of direction with reference to the perforated surface.
  • Such a spinneret is easier to produce than spinnerets of the pan shaped construction of the prior art which represent the basic rectangular form of spinneret employed and available in industry today.
  • Such prior are pan shaped spinnerets require a deep impression in forming the walls surrounding the fiat bottom portion, whereas the spinneret of the present invention requires a slight impression or bending at the very most.
  • the cold hardening of these angular shaped zones that are deeply impressed is avoided, and at all points a homogeneous metal is maintained, allowing excellent regularity of punching the spinning orifices.
  • the simple form of the spinneret briefly discussed above lends itself very readily to the production of large spinnerets, especially those in the form of bands that are equal to or greater than a meter in length.
  • Such spinnerets allow production of a sheet of filaments with a single spinneret, which clearly improves the homogeneity and appearance of such a sheet.
  • the band which comprises the spinneret is bent along its smaller dimension, thus assuming the form of a gutter.
  • the filaments are extruded from the convex side of the spinneret, perpendicularly thereto, and separated as they issue from the spinneret to thereby enhance penetration of the coagulation fluids. drying or cooling uids, etc., depending upon the particular spinning process employed.
  • the spinneret is held in a working position preferably by gripping the peripheral zone between two jaws near the perforated zone, with the peripheral zone being merely an extension of the perforated zone.
  • the peripheral zone of a spinneret can be reduced significantly, this reduction in the peripheral zone being made possible by the fact that the plate from which the spinneret is made is completely homogeneous, the metal of the spinneret not having been weakened by the sharp angular deformation of the edge portions as has been required with the prior art rectangular spinnerets.
  • it is possible to spin accurately at a given pressure with a thinner, less expensive spinneret than those conventionally used the cost savings in constructing the spinneret resulting from the ability to use a lighter weight metal and the ease with which the orifices of a thin foil may be pierced.
  • the marginal area of the spinneret is provided with a continuous groove that forms a closed loop around the perforated area.
  • This groove is adapted to mate with a corresponding configuration of the spinneret support, or extruder head, possibly in the form of a bead, which facilitates positioning of the spinneret.
  • This corresponding configuration can be made as a sealing joint of suitable for-m if desired.
  • the spinneret may be made of a metal or metal alloy that lends itself to ease in piercing of the spinning orifices and which preferably can be hardened to ensure longer life for the spinneret.
  • Piercing of the orifices is preferably done by punching, in any pattern desired, which pattern will form the perforated area of the spinneret surrounded by the imperforate marginal area. Since the present invention permits construction of a spinneret from thinner foils or metals, the piercing operation is greatly facilitated since the punch will not have to travel through any considerable thickness and the uniformity of each punch or opening can be maintained to a closer tolerance.
  • the present invention also concerns an extruder head equipped with the spinneret of the invention.
  • the head comprises a hollow body with a feed orifice for the composition that is to be spun and an extrusion orifice as well as means for setting the spinnert in place before the extruder opening.
  • the spinnert can be applied to the extruder head by a tightening cover against the opening, in direct contact with the edge of the opening, or with an intermediate plate.
  • the ele-ments with which the spinneret is in contact along its peripheral zone have a form that corresponds in shape and contour to that of the peripheral area so that the spinneret is not substantially deformed in the course of assembly.
  • a sealing joint is used to connect the spinneret to the extruder head, but any equivalent means may be employed to secure the spinneret of the invention to an extruder head.
  • a mixing element Inside the hollow body of the extruder head, there may be provided a mixing element, a divider or filter or possibly an element which can modify the temperature of the spinning composition, to adjust it to its optimum value for extrusion.
  • FIG. 1 illustrates in perspective and partially in crosssection one embodiment of the invention
  • FIG. 2 illustrates in cross-section the form of the spinneret after its assembly into the extruder head of the invention
  • FIG. 3 illustrates in plan view the spinneret of the invention.
  • FIG. 4 illustrates a second preferred embodiment of the present invention.
  • the extruder head comprises a hollow body 1, which is shown as rectangular in crosssection but any desired cross-sectional shape is permissible, the hollow 'body being connected to a feed passage 2 for receiving the spinning compostion from a pumping station (not shown).
  • the hollow body 1 is provided with flanges 4 extending outwardly from the opening 3.
  • a positioning offset 5 is provided in the hollow body at the opening 3 with the offset arranged to receive a distributor 7, which is shown in the form of a iiat perforated plate allowing correct distribution of a spinning composition passing through the extruder head.
  • a tightening plate 6 is provided having facing offsets 8 which mate with the offsets '5 to provide a receiving channel for the periphery of the distributor 7 when the plate 5 is assembled in its facing position with the flange 4.
  • the plate 6 has a flange 9 which mates with the flange 4 and the flanges 4 and 9 have openings 10 and 11, respectively, which receive a number of bolts therethrough for assembling the extruder head in its iiuid tight relation.
  • Cover 12 having openings 13 therethrough is provided to overlay the plate 6 and its integral flange 4 in mating relation so that the openings 13 are in axial alignment with the openings 10 and 11 when the extruder head is assembled.
  • the cover 12 may be counterbored as at 14 to provide recesses for the head of the bolts 15 which secure the extruder head in assembled relation.
  • the shape of the mating surfaces of the plate 6 and cover 12 is extremely important.
  • the surface 16 of the plate 6 and the surface 1.7 of the cover 12 are arcuate and have the same radius of curvature as the radius of curvature of the gutter shaped spinneret 20.
  • Channels Z1 are also provided in the surfaces 16 and 17 to carry a sealing member which assures the uid tight assembly of the spinneret with the extruder head.
  • This shape of the mating surfaces of the plate 6 and cover 12 is extremely important since when the spinneret 20 is placed over the extension of the opening 3 as formed by the plate 6, the tightening of the cover 12 tends lightly to separate the longitudinal edges of the spinneret to provide slight pretensioning which reduces the risk of deformation of the spinneret when it is subjected to the spinning pressure.
  • This important feature is a result of the arcuate shape of the surfaces 116 and 17 and the fact that the bolts 1-5 have their longitudinal axis extending obliquely to the plane of the marginal edge of the spinneret so that tightening of the bolt 15 produces this extension of the spinneret 20 over the surfaces 16 and 17.
  • the perforated portion of the spinneret is indicated generally at 22 with the marginal edges being shown at 23.
  • the perforated portion is substantially larger than the marginal areas so that the marginal areas 23 may be held at a minimum to reduce cost in production of a spinneret of the present invention.
  • a semicircular channel 24 which is designed to fit about the sealing member 25.
  • the channel may be smoothly formed and tightened down over the sealing member 25 which is preferably constructed of stainless steel, whereby the cover 12 securely fastens the spinneret 20 to the extruder head in a uid tight relation.
  • the radius of curvature of the perforated area 22 and the marginal area 23 is substantially the same which avoids any weakening of the spinneret during its manufacture or use.
  • the spinneret 20 shown in FIGS. l and 2 is constructed with a radius of curvature of 50 mm. and a length 175 mm. and a width of 65 mm.
  • the perforated zone is a rectangle of 48.4 x 1159 mm. centrally located within the unit so as to provide an unperforated peripheral area having a substantially constant width of approximately 8 mm.
  • This spinneret is made of an alloy of 93 platinum, 4% gold and 3% rhodium, with a substantially uniform thickness of .26 mm. It has 90,000 perforations of cylindrical configuration with a diameter of approximately .08 mm. The perforations may be distributed in any desired pattern and in the working device illustrated perforations are in rolls parallel to the width direction of the spinneret.
  • FIG. 3 Another embodiment of the spinneret which has been constructed and proven to be extremely efficient is that illustrated in FIG. 3.
  • the spinneret shown is a rectangular foil 832 x 80 mm. and having a thickness of .26 mm.
  • the spinneret is bent along its width so that a line in the widthwise direction taken at any point along the length of the device would be in the same plane as any other widthwise line, while lines taken on the device parallel to the lengthwise direction are not in the same plane as other lines taken along the lengthwise direction.
  • the bend forms a cylindrical spinneret With a 50 mm. radius of curvature.
  • the perforated area of the spinneret has some 450,000 apertures distributed in 5 rectangular zones which are indicated generally at 30.
  • Each zone contains 90,000 holes separated by an imperforate strip 31 which is constructed 15 mm. wide.
  • Each rectangular zone measures 148 x 60 mm. with the perforations of each of the rectangular zones being arranged in strips with several rows of perforations in each strip.
  • FIG. 4 Another preferred embodiment of the invention is illustrated in FIG. 4.
  • the body of this embodiment is indicated generally at 1', but the body of this extruder head is circular in cross-section as opposed to the rectangular body of the illustration of FIG. 11.
  • the distributor 7 of the embodiment of FIG. 4 is circular and has slots passing radially through at least an arcuate portion of the distributor 7 and extending in a direction parallel to the axis of the body.
  • the body 1 is provided with an opening 3 which is rectangular in plan view, but arcuate in cross-section as is clearly seen from the view of FIG. 4.
  • the thickness of the body 1 results in the opening 3 forming a passage of basically pie-shaped configuration when the body is viewed in cross-section.
  • the spinneret 20 which is arcuate in cross-section as previously described in connection with the extruder head of iFIG. l. Ihe spinneret again has the channel 24 which fits over the sealing member 25 framing the opening of the body 1.
  • the cover 12 is arcuate in cross-section and mates with the arcuate form of the body and the spinneret.
  • the peripheral portion of the cover has openings for receiving the attaching bolts 15 which are tightened down into the tapped and threaded holes extending about the periphery of the opening 3 in the body 1.
  • a heater 40 may be provided interior of the hollow body and the body may be insulated about a substantial portion thereof by a cover 41 enclosing insulation 32.
  • a liquid may be circulated through the chamber formed by the insulation 32 in order to assist incontrolling the temperature of the composition extruded through the device.
  • This embodiment of the invention is extremely simple to manufacture since it may be constructed from available piping and the dimensions of the piping maintained in close tolerance so that the members of the assembly will fit in tight telescoping relation.
  • a spinneret of rectangular shape having a substantially rectangular perforated zone located centrally in the spinneret with a substantially imperforated zone framing the perforated zone, the Width of said imperforated zone being substantially less than the width of said perforated zone and said spinneret being curved about its longitudinal axis to have a gutter-like shape with a substantially constant curvature throughout, said imperforated zone having substantially the same curvature as the adjacent portions of said perforated zone.
  • an extruder head having a hollow body portion, means forming a feed passage to said hollo-w body, a face for said hollow body having a substantially rectangular opening, a tightening plate engaging said face around said opening and having a surface with an arcuate configuration of substantially constant curvature extending completely around said opening, and a cover of rectangular cross section having a surface mating with said arcuate surface of said tightening plate, said tightening plate and said cover having openings aligned with said rectangular opening in said hollow body; an arcuate spinneret positioned between said tightening plate and said cover and having a curvature substantially that of said mating surfaces of said tightening plate and said cover; and means rigidly securing said arcuate spinneret between said cover and said tightening plate.
  • mating surfaces include channels forming a seal receiving opening framing said opening in said body and said spinneret has a sealing protrusion mating with said channels.
  • fsaid protrusion defines a peripheral rib on one side of said spinneret and a peripheral recess on the other side of said spinneret and further comprising a sealing member nal axis thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Sealing Material Composition (AREA)
  • Package Frames And Binding Bands (AREA)
US851800A 1968-08-21 1969-08-21 Man-made filament spinneret and extruder head Expired - Lifetime US3667886A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR163686 1968-08-21

Publications (1)

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US3667886A true US3667886A (en) 1972-06-06

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ID=8653914

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US851800A Expired - Lifetime US3667886A (en) 1968-08-21 1969-08-21 Man-made filament spinneret and extruder head

Country Status (8)

Country Link
US (1) US3667886A (de)
BE (1) BE736858A (de)
BR (1) BR6911618D0 (de)
DE (1) DE1942197A1 (de)
ES (1) ES172910Y (de)
FR (1) FR1587678A (de)
GB (1) GB1264346A (de)
NL (1) NL144339B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737269A (en) * 1971-08-23 1973-06-05 Unex Machine & Tool Co Inc Cutting apparatus for extruded material
US4318680A (en) * 1978-08-30 1982-03-09 American Cyanamid Company Spinnerette plate having multiple capillaries per counterbore for melt spinning fusion melts of acrylonitrile polymer and water
US4645444A (en) * 1983-03-23 1987-02-24 Barmag Barmer Maschinenfabrik Aktiengesellschaft Melt spinning apparatus
US4696633A (en) * 1984-05-26 1987-09-29 Barmag Ag Melt spinning apparatus
US4698008A (en) * 1984-06-22 1987-10-06 Barmag Ag Melt spinning apparatus
US4818458A (en) * 1985-11-26 1989-04-04 Japan Exlan Company Limited Method of producing acrylic fibers
US5906894A (en) * 1994-03-25 1999-05-25 Weyerhaeuser Company Multi-ply cellulosic products using high-bulk cellulosic fibers
US6688874B1 (en) * 1999-04-23 2004-02-10 Albert A. Simone Non-contact extrusion nozzle head for applying sealant material in an insulated glass assembly
US20170145594A1 (en) * 2015-02-18 2017-05-25 Kabushiki Kaisha Toshiba Spinning apparatus, nozzle head and spinning method
CN115369497A (zh) * 2022-09-14 2022-11-22 苏州斯宾耐特化纤科技有限公司 一种超高中空度的喷丝板及其制造工艺

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2044540C3 (de) * 1970-09-09 1981-12-10 Maschinenfabrik Moenus Ag, 6000 Frankfurt Bandmesserspaltmaschine für Leder, Gummi u.dgl.
IT1079352B (it) * 1976-09-04 1985-05-08 Akzo Nv Perfezionamento nelle testine di filatura
DE2725852C2 (de) * 1977-06-08 1985-04-18 Akzo Gmbh, 5600 Wuppertal Spinnkopf
IT1153511B (it) * 1982-05-04 1987-01-14 Camoga Spa Dispositivo di controllo della tendenza allo spostamento di una lama a nastro in una macchina spaccatrice
DE3508031A1 (de) * 1984-03-15 1985-09-26 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Schmelzspinnduese fuer hochmolekulare thermoplastische kunststoffe

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737269A (en) * 1971-08-23 1973-06-05 Unex Machine & Tool Co Inc Cutting apparatus for extruded material
US4318680A (en) * 1978-08-30 1982-03-09 American Cyanamid Company Spinnerette plate having multiple capillaries per counterbore for melt spinning fusion melts of acrylonitrile polymer and water
US4645444A (en) * 1983-03-23 1987-02-24 Barmag Barmer Maschinenfabrik Aktiengesellschaft Melt spinning apparatus
US4696633A (en) * 1984-05-26 1987-09-29 Barmag Ag Melt spinning apparatus
US4698008A (en) * 1984-06-22 1987-10-06 Barmag Ag Melt spinning apparatus
US4818458A (en) * 1985-11-26 1989-04-04 Japan Exlan Company Limited Method of producing acrylic fibers
US5906894A (en) * 1994-03-25 1999-05-25 Weyerhaeuser Company Multi-ply cellulosic products using high-bulk cellulosic fibers
US6688874B1 (en) * 1999-04-23 2004-02-10 Albert A. Simone Non-contact extrusion nozzle head for applying sealant material in an insulated glass assembly
US20170145594A1 (en) * 2015-02-18 2017-05-25 Kabushiki Kaisha Toshiba Spinning apparatus, nozzle head and spinning method
CN115369497A (zh) * 2022-09-14 2022-11-22 苏州斯宾耐特化纤科技有限公司 一种超高中空度的喷丝板及其制造工艺

Also Published As

Publication number Publication date
NL144339B (nl) 1974-12-16
NL6912137A (de) 1970-02-24
DE1942197A1 (de) 1970-02-26
ES172910Y (es) 1972-11-01
GB1264346A (de) 1972-02-23
ES172910U (es) 1972-02-16
BR6911618D0 (pt) 1973-01-11
BE736858A (de) 1969-12-31
FR1587678A (de) 1970-03-27

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