US2879676A - Manufacture of spinning nozzles - Google Patents

Manufacture of spinning nozzles Download PDF

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Publication number
US2879676A
US2879676A US338482A US33848253A US2879676A US 2879676 A US2879676 A US 2879676A US 338482 A US338482 A US 338482A US 33848253 A US33848253 A US 33848253A US 2879676 A US2879676 A US 2879676A
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US
United States
Prior art keywords
spinning
apertures
core
manufacture
chromium
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
US338482A
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English (en)
Inventor
Burkhardt Max
Grafried Emil
Raunecker Gretelore
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.)
WC Heraus GmbH and Co KG
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WC Heraus GmbH and Co KG
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
Application filed by WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Application granted granted Critical
Publication of US2879676A publication Critical patent/US2879676A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • 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
    • D01D4/027—Spinnerettes containing inserts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/029—Molding with other step

Definitions

  • Heraeus G.m.b.H., Hanan ma Wholly synthetic filaments, more particularly filaments of polyamides and similar poly-condensates and other polymer substances, are generally produced by forcing the ready-prepared substance in a molten or plastic state through spinning apertures, the substance then solidifying to form filaments when cooling down.
  • This procedure places much higher requirements upon the spinning elements than the methods known in the manufacture of rayon filaments and of viscose wool.
  • the temperatures lie up to 200 higher, and the pressures exceed those of the earlier methods.
  • the spinning apertures which may for example have, at the outlet side of the spinning disc, a diameter of one tenth, or a few tenths, of a millimetre, must retain their accurate dimension at these relatively high temperatures and pressures. Although the spinning apertures are additionally exposed at these high pressures and temperatures, to constant friction by the extruded synthetic resin substance, they must retain their high gloss and must not become rough. These qualities of the surface of the spinning apertures must also not get lost during cleaning with concentrated acids
  • the present invention has for an object to enable spinning nozzles suitable for the production of wholly synthetic filaments to be produced having spinning passages of any shape required by the spinning technique and which, at the same time, may be produced directly with the desired high-gloss polish.
  • the spinning passages are provided in the spinning discswhich, in a known manner, may consist, for example, of steel plates of 6 to 10 mms. thicknessby the following method: I
  • a core is made having the shape of the spinning aperture to be produced.
  • a layer of hard metal resistant to nitric acid and having a thickness of, for example, 0.5 to 3 mms., which may be done by a known method.
  • hard base metals such as chromium or chromium alloys, the metal being preferably galvanically deposited on the core.
  • a thin intermediate metal layer is first applied, for example, by vapour deposition in a vacuum, whereafter the hard chromium coating is gales atef r" 2,879,676 Patented Mar. 31, 1959 plied to the core may also itself be deposited by other 3 methods, e.g., by high vacuum vapour. deposition, cathode sputtering, or gas decomposition.
  • the material for the core is so selected that it may be removed. chemically without damage to the metal deposited thereon.
  • the core is made of an iron-nickel alloy; this alloy may readily be removed from ashell of chromium by being dissolved in nitric acid.
  • the shell body thus obtained is then inserted into a corresponding aperture provided in the spinning disc and may, if desired or necessary, be further secured therein by known methods, such as pressing, swaging, soldering or brazing; a firm seal at the edge may also besensured by additional galvanic deposition of'metal', for example of chromium.
  • the core the shape of which corresponds to the desired spinning aperture, is not of a's'lim cone shape, it is advisable'to grind the shell body externally to a slim cone shape and to insert it intoa correspondingly shaped aperture of the spinning disc, thereby ensuring aparticularly firm seating.
  • Fig. 1 is a cross-section of a small portion of a spinning disc.
  • Fig. 2 is a similar section of the core for a spinning nozzle.
  • Fig. 3 similarly shows the core with the shell deposited thereon
  • Fig. 4 is a view similar to Figure 1 showing the corresponding part of the completed spinning disc equipped with a nozzle.
  • a spinning disc A of which a small portion is shown in Figure 1, and having a thickness of 6 mms. is desired to be provided with spinning apertures having the shape shown in Fig. 2.
  • the spinning apertures in this example have a hyperboloidal section.
  • the diameter may, for example, be
  • a core as shown at B in Fig. 2 is made of a metal soluble in nitric acid, for example of an iron-nickel alloy.
  • a hard chromium layer C ( Figure 3) having the thickness of 2 mms. is then galvanically deposited. This layer is ground down externally along the circumference D to produce a slim cone fitting into the conical aperture of the spinning disc A ( Figure 1).
  • the shell C is, after the core B has been removed by being dissolved in nitric acid, inserted according to Figure 4, into the conical recess of the spinning disc A having a thickness of 3 to 6 mms. and, if necessary or desired, may be additionally secured and sealed by one of the above-mentioned methods.
  • spinning apertures may be produced without difiiculty having a cylindrical passage with a diameter of as little as 0.1 mm. or even less, a problem which cannot be solved with drilled precious metal insertions.
  • the inner surface of the spinning passages will be produced directly with a high-gloss polish provided only that the core, which can be readily machined or otherwise worked from its outer side, is made with a high polish.
  • This method also is not limited to the use of precious metals thus permitting the utilisation of the very great hardness and chemical resistance of chromium.
  • the illustrated form of the spinning aperture is only given by way of example and that, in fact, the new method makes it possible for the spinning apertures to be produced having any of a variety of shapes desirable for reasons of the spinning technique and constituted, for example, by a combination of cylindrical and conical parts, or having a vertical section composed of curves of different nature.
  • the fine spinning passages may also be arranged to project beyond the :outer surface of the spinning discs thus ensuring further advantages in special cases.
  • a method for the manufacture of spinning nozzles, wherein spinning apertures have a hyperboloidal section comprising making cores having the desired hyperboloidal shape of the spinning apertures to be produced, depositing on each of the cores 2. layer of chromium of snflicient thickness to form a shell wherein the outer surface may e sh p d o a desired f m i din the surfa e i t h l to a u a nt o nisa term, em n the cores from the shells by dissolving the same, providing spinning discs having openings of conical form suitably shaped for receiving the shell bodies, inserting the ground chromium shell bodies into the openings of the discs, and securing said shell bodies in said openings.
  • spinning apertures have a significantly curved section, comprising making cores having the desired curved shape of the spinning apertures to be produced, depositing on each of the cores a layer of chromium of sufficient thickness to form a shell wherein the outer surface may be shaped to a desired form, grinding the outer surface of the shells to a regular continuous conical form, removing the cores frornthe shells by dissolving the same, providing spinning discs having openings of conical form suitably shaped for receiving the shell bodies, inserting the ground chromium shell bodies into the openings of the spinning discs, and securing said shell bodies in said openings.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US338482A 1952-03-01 1953-02-24 Manufacture of spinning nozzles Expired - Lifetime US2879676A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE314276X 1952-03-01

Publications (1)

Publication Number Publication Date
US2879676A true US2879676A (en) 1959-03-31

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US338482A Expired - Lifetime US2879676A (en) 1952-03-01 1953-02-24 Manufacture of spinning nozzles

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US (1) US2879676A (en(2012))
CH (1) CH314276A (en(2012))
NL (2) NL84526C (en(2012))

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141358A (en) * 1962-05-09 1964-07-21 Du Pont Method for forming spinning orifices in spinneret plate structures
US3174183A (en) * 1962-04-16 1965-03-23 Us Rubber Co Spinneret plate
US3210451A (en) * 1960-12-01 1965-10-05 Celanese Corp Spinnerettes
US3253301A (en) * 1963-01-14 1966-05-31 Monsanto Co Non-circular spinneret orifices
US3287764A (en) * 1965-06-01 1966-11-29 Black Clawson Co Plastic pelletizers
US4015924A (en) * 1973-08-10 1977-04-05 Celanese Corporation Spinning apparatus providing for essentially constant extensional strain rate
US4200136A (en) * 1978-07-28 1980-04-29 Corning Glass Works Method for making an optical waveguide coating die
US5227109A (en) * 1992-01-08 1993-07-13 Wellman, Inc. Method for producing multicomponent polymer fibers
US5259753A (en) * 1988-11-18 1993-11-09 E. I. Du Pont De Nemours And Company Spinneret capillaries
US5388980A (en) * 1991-02-27 1995-02-14 Kyocera Corporation Spinning nozzle tip structure
EP0656433A1 (en) * 1993-12-02 1995-06-07 Filtration Systems Inc. Nozzle plate for spinning

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048060A (en) * 1957-03-25 1962-08-07 Union Carbide Corp Method of making articles having internal surface of desired contour and articles produced thereby

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1604216A (en) * 1925-04-02 1926-10-26 Clement S Brainin Method of making spinnerets
US1654936A (en) * 1926-03-23 1928-01-03 Baker & Co Inc Method of making spinnerets
US1672644A (en) * 1925-04-06 1928-06-05 Hoffmann Helmut Nozzle for spinning artificial threads
US1708715A (en) * 1927-03-01 1929-04-09 Robert M Akin Process of making dies
US1817680A (en) * 1925-11-28 1931-08-04 Harold I Pratt Die of the extruding and wire drawing type and process of making the same
US2078509A (en) * 1934-02-13 1937-04-27 Ind Rayon Corp Spinneret
US2422612A (en) * 1945-08-17 1947-06-17 Fort Wayne Wire Die Company Method for making wire drawing dies
US2461640A (en) * 1946-11-29 1949-02-15 Chase Brass & Copper Co Method of producing dies for extruding externally finned tubes
US3408713A (en) * 1965-06-15 1968-11-05 Chemcell Ltd Chemcell Limitee Preparation of filter tow

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1604216A (en) * 1925-04-02 1926-10-26 Clement S Brainin Method of making spinnerets
US1672644A (en) * 1925-04-06 1928-06-05 Hoffmann Helmut Nozzle for spinning artificial threads
US1817680A (en) * 1925-11-28 1931-08-04 Harold I Pratt Die of the extruding and wire drawing type and process of making the same
US1654936A (en) * 1926-03-23 1928-01-03 Baker & Co Inc Method of making spinnerets
US1708715A (en) * 1927-03-01 1929-04-09 Robert M Akin Process of making dies
US2078509A (en) * 1934-02-13 1937-04-27 Ind Rayon Corp Spinneret
US2422612A (en) * 1945-08-17 1947-06-17 Fort Wayne Wire Die Company Method for making wire drawing dies
US2461640A (en) * 1946-11-29 1949-02-15 Chase Brass & Copper Co Method of producing dies for extruding externally finned tubes
US3408713A (en) * 1965-06-15 1968-11-05 Chemcell Ltd Chemcell Limitee Preparation of filter tow

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3210451A (en) * 1960-12-01 1965-10-05 Celanese Corp Spinnerettes
US3174183A (en) * 1962-04-16 1965-03-23 Us Rubber Co Spinneret plate
US3141358A (en) * 1962-05-09 1964-07-21 Du Pont Method for forming spinning orifices in spinneret plate structures
US3253301A (en) * 1963-01-14 1966-05-31 Monsanto Co Non-circular spinneret orifices
US3287764A (en) * 1965-06-01 1966-11-29 Black Clawson Co Plastic pelletizers
US4015924A (en) * 1973-08-10 1977-04-05 Celanese Corporation Spinning apparatus providing for essentially constant extensional strain rate
US4200136A (en) * 1978-07-28 1980-04-29 Corning Glass Works Method for making an optical waveguide coating die
US5259753A (en) * 1988-11-18 1993-11-09 E. I. Du Pont De Nemours And Company Spinneret capillaries
US5388980A (en) * 1991-02-27 1995-02-14 Kyocera Corporation Spinning nozzle tip structure
US5227109A (en) * 1992-01-08 1993-07-13 Wellman, Inc. Method for producing multicomponent polymer fibers
EP0656433A1 (en) * 1993-12-02 1995-06-07 Filtration Systems Inc. Nozzle plate for spinning
CN1044499C (zh) * 1993-12-02 1999-08-04 过滤系统株式会社 纺丝的喷丝板

Also Published As

Publication number Publication date
NL176373B (nl)
NL84526C (en(2012))
CH314276A (de) 1956-06-15

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