US3669591A - Apparatus for producing composite fibers - Google Patents

Apparatus for producing composite fibers Download PDF

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Publication number
US3669591A
US3669591A US18563A US3669591DA US3669591A US 3669591 A US3669591 A US 3669591A US 18563 A US18563 A US 18563A US 3669591D A US3669591D A US 3669591DA US 3669591 A US3669591 A US 3669591A
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US
United States
Prior art keywords
section
spinneret plate
circular cross
distribution plate
plate
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Expired - Lifetime
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US18563A
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English (en)
Inventor
Enzo Fermi
Francesco Sassanelli
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SnamProgetti SpA
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SnamProgetti SpA
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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
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/32—Side-by-side structure; Spinnerette packs therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising

Definitions

  • a spinning head for melt spinning of composite filaments comprised of two polymers of equal semi-circular cross-section in which the mating faces of a distribution plate and a spinneret plate form two separate annular cavities each communicating with a different polymer supply contained in the distribution plate.
  • a plurality of extrusion holes in the spinneret plate have their upper end portions of semi-circular cross-section communicating with one of the annular cavities and the remaining portions of circular cross-section communicating with the other annular cavity.
  • the present invention refers to new extruders suitable for obtaining composite fibers and filaments.
  • Another object of this invention is to provide, in a new and improved apparatus for forming composite fibers and filaments, a spinneret plate which is of simplified construction and utilization.
  • the foregoing objects of the present invention are attained by providing a spinneret plate which consists of a single piece, thereby reducing sealing difficulties which are generally encountered in conventional spinning heads, which require two spinneret plates for forming conjugated fibers.
  • the extrusion orifices of the spinneret plate are partially semi-circular and partially circular in cross-section and receive the two polymers at different points, so that the first polymer is shaped into a semi-circular cross-section before the second polymer is introduced to the portion of the extrusion holes having a circular cross-section. Practically, it is preferable that the semi-circular cross-sectional portion of each of the extrusion holes extends for at least 2 mm.
  • the polymer distribution plate is an integral part of the apparatus in that the possibility of employing the spinneret plate for forming bicomposed filaments depends on its lower face being shaped so as to mate perfectly with the upper face of the spinneret plate.
  • FIG. 1 represents a cross section of spinneret plate B and distribution plate A constructed according to the present invention.
  • FIG. 2 is a top plan view of the spinneret plate according to FIG. 1.
  • FIG. 3 shows a cross section of another spinneret plate 1) and distribution plate C, according to the present invention.
  • FIG. 4 is a top plan view of the spinneret plate of FIG. 5 is a photographic reproduction of an assembly according to the invention.
  • the hollow chamber 1 and 2 of distribution plate A contain two different polymers which, through the fares 3 and 4, respectively, are fed through the annuluses 5, 7, respectively, to the extrusion holes 8.
  • the polymer contained in chamber 1 enters extrusion hole 8 at a point 9 where it is semi-circular in cross-section and the polymer contained in chamber 2 of the distribution plate enters the extrusion hole 8 at a point where it is circular in cross-section.
  • the extrusion device suitable for manufacturing bicomposed fibers consists of a spinneret plate and a distribution plate and is characterized in that the feeding of two different polymers takes place at different levels with respect to the spinneret extrusion hole.
  • One of the polymers is fed to the extrusion hole at a point where its cross-section is semi-circular in shape so as to be formed into a semicylindrical profile before reaching the portion of the extrusion hole which has a circular cross-section, where the other polymer is introduced.
  • a spinning head constructed according to the invention permits the distribution plate to be shaped so as to enable the unit to be sealed both on the external periphery thereof and also on its central zone which contacts the spinneret plate. Also, as previously mentioned, the distribution plate allows the distribution of different polymers in two different points of the spinneret plate extrusion holes by using the semi-circular cross section of the hole formed by the distribution plate for feeding a first polymer thereto and feeding the other polymer at another half of the hole in the point where the complete circular cross section is reinstated.
  • a spinning head for melt spinning of composite filaments or the like including a spinneret plate;
  • said spinneret plate including a plurality of extrusion holes, each of said extrusion holes including a first portion of semicircular cross-section, and a second portion of circular cross-section; a distribution plate including a first chamber, a first passageway extending out of said first chamber,
  • first annular cavity means being defined by said spinnert and distribution plates and communicating said first passageway extending out of said first chamber 5 with said first semi-circular portions of each of said extrusion holes; and second annular cavity means being defined by said spinneret and distribution plates and communicating said second passageway extending out of said second chamber to said second circular portions of each of said extrusion holes.
  • said first annular recess adapted to telescopically slida-bly receive a portion of said first annular rib member formed on said spinneret plate so as to form said first annular cavity means;
  • said distribution plate having further formed on said one face thereof a second annular recess opening at one side into said first annular recess 5 and communicating with said second passagey, said second annular recess adapted to form with said one face of said spinneret plate said second annular cavity means; and said extrusion holes are formed in said spinneret plate so that their central axes are in registry with the inner edge of said first annular rib member,
  • a spinning head a claimed in claim 1, wherein said semi-circular cross-sectional portion of each of said extrusion holes extends for a length of at least 2 mm.
  • said spinneret plate has an annular step formed opposite said second annular recess in said distribution plate and extending along the outer portion thereof; whereby said first and second annular cavity means each include narrowed portions adjacent said extrusion holes.
  • said first annular recess is bounded on its outer edge by the peripheral portion of said distribution plate so as to form a circumferentially-extending outer rib; and said spinneret plate includes a circumferentially-extending groove adjacent said first annular rib member and extending along the peripheral edge of said spinneret plate,
  • Patent No. 3,669,591 Dated June 13, 1972 Inventor(s) Enzo Fermi and Francesco Sassanelli It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US18563A 1969-03-11 1970-03-11 Apparatus for producing composite fibers Expired - Lifetime US3669591A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1391469 1969-03-11

Publications (1)

Publication Number Publication Date
US3669591A true US3669591A (en) 1972-06-13

Family

ID=11144726

Family Applications (1)

Application Number Title Priority Date Filing Date
US18563A Expired - Lifetime US3669591A (en) 1969-03-11 1970-03-11 Apparatus for producing composite fibers

Country Status (9)

Country Link
US (1) US3669591A (xx)
BE (1) BE746935A (xx)
CA (1) CA927561A (xx)
DE (1) DE2010503C3 (xx)
ES (1) ES185291Y (xx)
FR (1) FR2037635A5 (xx)
GB (1) GB1273111A (xx)
LU (1) LU60476A1 (xx)
NL (1) NL7003214A (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792944A (en) * 1970-07-20 1974-02-19 Mitsubishi Rayon Co Spinneret for composite spinning
US4052146A (en) * 1976-11-26 1977-10-04 Monsanto Company Extrusion pack for sheath-core filaments
US4421465A (en) * 1980-10-30 1983-12-20 Mobil Oil Corporation Apparatus providing uniform resin distribution in a coextruded product
US5352106A (en) * 1991-08-06 1994-10-04 Barmag Ag Apparatus for melt spinning multicomponent yarns
EP0786543A1 (en) * 1996-01-23 1997-07-30 FARE' S.p.A. Method and apparatus for making two-component fibers
EP1063070A2 (en) * 1999-06-25 2000-12-27 Sumika Color Company Limited Process for manufacturing multilayer pellets and use of the multilayer pellets
US20040119195A1 (en) * 2002-02-13 2004-06-24 American Maplan Corporation Double-webbed mandrel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2803136C2 (de) * 1978-01-25 1984-04-05 Akzo Gmbh, 5600 Wuppertal Verfahren und Vorrichtung zur Herstellung eines aus wenigstens zwei synthetischen Polymerkomponenten bestehenden Mehrkomponentenfadens

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792944A (en) * 1970-07-20 1974-02-19 Mitsubishi Rayon Co Spinneret for composite spinning
US4052146A (en) * 1976-11-26 1977-10-04 Monsanto Company Extrusion pack for sheath-core filaments
US4421465A (en) * 1980-10-30 1983-12-20 Mobil Oil Corporation Apparatus providing uniform resin distribution in a coextruded product
US5352106A (en) * 1991-08-06 1994-10-04 Barmag Ag Apparatus for melt spinning multicomponent yarns
EP0786543A1 (en) * 1996-01-23 1997-07-30 FARE' S.p.A. Method and apparatus for making two-component fibers
EP1063070A3 (en) * 1999-06-25 2003-01-02 Sumika Color Company Limited Process for manufacturing multilayer pellets and use of the multilayer pellets
EP1063070A2 (en) * 1999-06-25 2000-12-27 Sumika Color Company Limited Process for manufacturing multilayer pellets and use of the multilayer pellets
US6669986B1 (en) 1999-06-25 2003-12-30 Sumika Color Company, Limited Process for manufacturing multilayer pellets and use of the multilayer pellets
US20040131853A1 (en) * 1999-06-25 2004-07-08 Sumika Color Company, Limited Process for manufacturing multilayer pellets and use of the multilayer pellets
US6986945B2 (en) 1999-06-25 2006-01-17 Sumitomo Chemical Company, Limited Process for manufacturing multilayer pellets and use of the multilayer pellets
EP1857243A1 (en) * 1999-06-25 2007-11-21 Sumika Color Company Limited A process for manufacturing multilayer pellets and use of the multilayer pellets
US20040119195A1 (en) * 2002-02-13 2004-06-24 American Maplan Corporation Double-webbed mandrel
US7329116B2 (en) * 2002-02-13 2008-02-12 American Maplan Corporation Double-webbed mandrel

Also Published As

Publication number Publication date
BE746935A (fr) 1970-08-17
DE2010503C3 (de) 1974-10-17
DE2010503B2 (de) 1974-02-28
ES185291U (es) 1973-10-01
NL7003214A (xx) 1970-09-15
DE2010503A1 (de) 1971-05-06
FR2037635A5 (xx) 1970-12-31
GB1273111A (en) 1972-05-03
CA927561A (en) 1973-06-05
ES185291Y (es) 1974-06-16
LU60476A1 (xx) 1970-05-11

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