US3814559A - Spinneret with inert gas metering ring - Google Patents

Spinneret with inert gas metering ring Download PDF

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Publication number
US3814559A
US3814559A US00301536A US30153672A US3814559A US 3814559 A US3814559 A US 3814559A US 00301536 A US00301536 A US 00301536A US 30153672 A US30153672 A US 30153672A US 3814559 A US3814559 A US 3814559A
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US
United States
Prior art keywords
ring
spinneret
metering
groove
retainer ring
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
US00301536A
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English (en)
Inventor
C Akers
S Crewe
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US00301536A priority Critical patent/US3814559A/en
Priority to FR7337897A priority patent/FR2204500B1/fr
Priority to CA184,204A priority patent/CA967316A/en
Priority to JP48119498A priority patent/JPS5021564B2/ja
Priority to NL7314772.A priority patent/NL156452B/xx
Priority to AR250714A priority patent/AR200744A1/es
Priority to DE19732353824 priority patent/DE2353824B2/de
Priority to BE137102A priority patent/BE806562A/xx
Priority to GB5003573A priority patent/GB1443729A/en
Application granted granted Critical
Publication of US3814559A publication Critical patent/US3814559A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B29C48/27—Cleaning; Purging; Avoiding contamination
    • B29C48/272—Cleaning; Purging; Avoiding contamination of dies
    • 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

Definitions

  • ABSTRACT A conventional round spinneret is blanketed with inert gas by providing a passage for the gas through the spinning pack assembly to the lower face of the spinneret and providing a metering ring encircling the filament array and in contact with the lower face of the spinneret.
  • In the upper surface of the ring is a groove for distributing gas around the filament array and a plurality of vertical holes connect the groove with the underside of the ring.
  • a spinneret retainer ring Below the metering ring is a spinneret retainer ring-with a groove in its upper surface in communication with the vertical holes in the metering ring.
  • the retainer ring has a lip formed in its inner periphery which in conjunction with the metering ring forms an open slot through which inert gas passes laterally towards the filament array.
  • the vertical holes are sized to provide an appreciable pressure drop through each hole while avoiding turbulent flow into the retainer ring groove which must diffuse the individual streams of gas and deliver the gas in a smooth uniform stream to the filaments through the slot.
  • the present invention relates to the production of synthetic polymeric filaments and particularly to apparatus for blanketing the exposed face of a spinneret with an inert gas.
  • No. 3,229,330 various arrangements are shown for' providing hot inert gas to the region of the spinneret face through distribution channels surrounding the filament spinning pack including various arrangements of gas distribution channels in the spinneret retainer, the pack assembly, and the space between the two. It can be appreciated that when a large spinning operation may include many hundreds of spinning pack assemblies, it is desirable that the parts be simple in design so as to be inexpensive to fabricate and clean. The internally drilled passages of Ferrier et al. are relatively difficult to fabricate and some arrangements are not easily inspected for cleanliness.
  • an apparatus for blanketing the face of a spinneret with inert gas is incorporated into the spinneret assembly by adding a metering ring between the spinneret and its retainer ring.
  • the spinneret assembly contains a spinneret plate having a lower face with an orifice array through which filaments are extruded and the plate is held in place by a retainer ring which has an upper surface with a continuous groove and terminates in a lip at its inner periphery.
  • a metering ring surrounding the orifice array is located between the lower face of the spinneret and the retainer ring and has its upper and lower surfaces connected by a continuous groove in the upper surface in communication with a plurality of vertical holes leading through the lower surface.
  • Means are provided for supplying inert gas to the continuous groove in the metering ring.
  • the retainer ring lip and the lower surface of the metering ring form an open slot through which inert gas passes laterally toward an array of filaments extruded through the spinneret orifices.
  • FIG. 1 is a cross-sectional view through the center of a spinning pack assembly showing the invention.
  • FIG. 2 is a top view of the metering ring of FIG. 1.
  • FIG. 3 shows an alternate embodiment of the invention.
  • the spinning pack assembly 1 is shown schematically.
  • the lower element of the pack assembly is spinneret 2 having holes through which polymeric filaments 3 are extruded.
  • the internal details of the polymer supply are immaterial to this case and are omitted.
  • inert gas is supplied through the spinning block (not shown) to metering orifice 4 whichforms a tight seal between the gas supply and the spinning pack.
  • Inert gas passage 5 leads the gas through the spinning pack to the underside of the spinneret.
  • Metering ring 6 surrounds the filament array below the spinneret face and has a continuous circular groove 7 cut into its upper surface.
  • a series of vertical holes 8 connect groove 7 with the underside of ring 6 and meter inert gas into continuous plenum groove 9 in the spinneret-retainer 10 below.
  • the gas then passes laterally toward the filament array through gap or slot 11 formed between the lower surface of metering ring 6 and lip 12 formed at the inner periphery of the spinneret retainer.
  • metering ring 6 must be sufficiently strong to support the upward force exerted by spinneret retainer 10 against spinneret 2 which supports the weight of spinning pack 1 and seals the polymer and inert gas supplies to their respective sources against their respective pressures.
  • Holes 8 are sufficiently small so as to produce an appreciable pressure drop through each hole, thus forcing the flowing gas to distribute itself relatively uniformly around groove 7.
  • holes 8 should not be so small that the velocity of the gas through each is excessive, giving high turbulence in plenum groove 9, the purpose of which is to diffuse the discrete streams of gas entering through holes 8 and to deliver the gas in a relatively smooth uniform stream to the filaments through gap 11.
  • metering ring 6 is shown in an alternative form which may be stamped from sheet metal in quantity at lower cost than the machined metering ring 6 of FIGS. 1 and 2.
  • the continuous groove 7 takes the form of an indentation with a corresponding protrusion which extends downwardly into retainer groove 9.
  • the thinness of the metal and its configuration comprises the ring assembly and allows inert gas to be delivered through gap 11 closer to the lower face of spinneret 2 than in the arrangement of FIG. 1.
  • flange 15 of metering ring 6 may be shortened and lip 12 of spinneret retainer 10 may be extended so that inert gas passing from plenum groove 9 toward the filament array first passes through a gap formed between the inside surface of lip 12 and the contiguous surface of metering ring 6 and then passes laterally toward the filament array through a gap 11 between lip 12 and the lower surface of spinneret 2.
  • Flange 13 may be added at the outer periphery of metering ring 6 to mate with a chamfer of spinneret 2 for positive concentric alignment of metering ring 6 with the filament array.
  • Metering ring 6 and the unique features of spinneret retainer 10 are easy to fabricate and are compatible with conventional designs of spinning packs and spinneret retainers.
  • Metering ring 6 is sufficiently rugged to resist damage in assembly and disassembly and the grooves and holes in both the metering ring and spinneret retainer can be readily cleaned and inspected for freedom from dirt and obstructions.
  • An apparatus for blanketing the face of a spinneret with inert gas comprising: a spinneret assembly containing spinneret plate having a lower face with an orifice array through which filaments are extruded, said plate being held in place by a retainer ring surrounding said array, said retainer ring having an upper surface and an inner periphery, said upper retainer ring surface having a continuous groove therein, said retainer ring terminating in a lip at its inner periphery; a metering ring surrounding said array located between the lower face of the spinneret and the upper surface of the retainer ring, said metering ring having upper and lower surfaces connected by a continuous groove in communication with a plurality of vertical holes leading through the lower metering ring surface; and means for supplying inert gas to the continuous groove in the metering ring, the retainer ring lip and the lower surface of the metering ring forming an open slot surrounding the array of orifices, said slot being in communication with the
  • said continuous groove in said metering ring being in the form of an indentation in the upper surface of the ring with a corresponding protrusion in the lower surface of the ring, said protrusion extending into the groove formed in the upper surface of the retainer ring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US00301536A 1972-10-27 1972-10-27 Spinneret with inert gas metering ring Expired - Lifetime US3814559A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00301536A US3814559A (en) 1972-10-27 1972-10-27 Spinneret with inert gas metering ring
FR7337897A FR2204500B1 (enrdf_load_stackoverflow) 1972-10-27 1973-10-24
JP48119498A JPS5021564B2 (enrdf_load_stackoverflow) 1972-10-27 1973-10-25
CA184,204A CA967316A (en) 1972-10-27 1973-10-25 Spinnerette with gas metering ring
NL7314772.A NL156452B (nl) 1972-10-27 1973-10-26 Inrichting voor het met inert gas afschermen van het vlak van een spindop.
AR250714A AR200744A1 (es) 1972-10-27 1973-10-26 Aparato para proteger el frente de una hilera con gas inerte
DE19732353824 DE2353824B2 (de) 1972-10-27 1973-10-26 Vorrichtung zum abschirmen einer spinnduesenflaeche mit inertgas
BE137102A BE806562A (fr) 1972-10-27 1973-10-26 Dispositif servant a proteger par une couche de gaz inerte la face d'une filiere
GB5003573A GB1443729A (en) 1972-10-27 1973-10-26 Spinneret assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00301536A US3814559A (en) 1972-10-27 1972-10-27 Spinneret with inert gas metering ring

Publications (1)

Publication Number Publication Date
US3814559A true US3814559A (en) 1974-06-04

Family

ID=23163801

Family Applications (1)

Application Number Title Priority Date Filing Date
US00301536A Expired - Lifetime US3814559A (en) 1972-10-27 1972-10-27 Spinneret with inert gas metering ring

Country Status (9)

Country Link
US (1) US3814559A (enrdf_load_stackoverflow)
JP (1) JPS5021564B2 (enrdf_load_stackoverflow)
AR (1) AR200744A1 (enrdf_load_stackoverflow)
BE (1) BE806562A (enrdf_load_stackoverflow)
CA (1) CA967316A (enrdf_load_stackoverflow)
DE (1) DE2353824B2 (enrdf_load_stackoverflow)
FR (1) FR2204500B1 (enrdf_load_stackoverflow)
GB (1) GB1443729A (enrdf_load_stackoverflow)
NL (1) NL156452B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959057A (en) * 1975-04-07 1976-05-25 Smith Jesse J Means and method for producing plastic netting
US4124666A (en) * 1976-07-03 1978-11-07 Bayer Aktiengesellschaft Method of keeping nozzle bodies or breaker plates clean during extrusion of polymer melts
US4431602A (en) * 1981-10-20 1984-02-14 Bayer Aktiengesellschaft Process and apparatus for conducting the hot gas in the dry spinning process
US4606872A (en) * 1983-03-09 1986-08-19 Kashima Oil Company Method for spinning carbon fibers
US4670202A (en) * 1983-02-24 1987-06-02 Toa Nenryo Kogyo Kabushiki Kaisha Method and apparatus for melt spinning
DE3840357A1 (de) * 1987-12-05 1989-06-15 Barmag Barmer Maschf Spinnanlage fuer chemiefasern
US5935512A (en) * 1996-12-30 1999-08-10 Kimberly-Clark Worldwide, Inc. Nonwoven process and apparatus
WO2002000972A1 (en) * 2000-06-23 2002-01-03 E. I. Du Pont De Nemours And Company Steam distribution ring for spinning machines
US9777637B2 (en) 2012-03-08 2017-10-03 General Electric Company Gas turbine fuel flow measurement using inert gas

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830453A1 (de) * 1998-07-08 2000-01-13 Lurgi Zimmer Ag Verfahren und Vorrichtung zum Transport von Dampf durch mindestens einen runden Spinndüsenschacht

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252689A (en) * 1938-03-10 1941-08-19 Du Pont Production of filaments, ribbons, and the like
US3761559A (en) * 1972-04-24 1973-09-25 Du Pont Opposed flow spinneret blanketer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252689A (en) * 1938-03-10 1941-08-19 Du Pont Production of filaments, ribbons, and the like
US3761559A (en) * 1972-04-24 1973-09-25 Du Pont Opposed flow spinneret blanketer

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959057A (en) * 1975-04-07 1976-05-25 Smith Jesse J Means and method for producing plastic netting
US4124666A (en) * 1976-07-03 1978-11-07 Bayer Aktiengesellschaft Method of keeping nozzle bodies or breaker plates clean during extrusion of polymer melts
US4431602A (en) * 1981-10-20 1984-02-14 Bayer Aktiengesellschaft Process and apparatus for conducting the hot gas in the dry spinning process
US4670202A (en) * 1983-02-24 1987-06-02 Toa Nenryo Kogyo Kabushiki Kaisha Method and apparatus for melt spinning
US4606872A (en) * 1983-03-09 1986-08-19 Kashima Oil Company Method for spinning carbon fibers
DE3840357A1 (de) * 1987-12-05 1989-06-15 Barmag Barmer Maschf Spinnanlage fuer chemiefasern
US5935512A (en) * 1996-12-30 1999-08-10 Kimberly-Clark Worldwide, Inc. Nonwoven process and apparatus
WO2002000972A1 (en) * 2000-06-23 2002-01-03 E. I. Du Pont De Nemours And Company Steam distribution ring for spinning machines
US20020043733A1 (en) * 2000-06-23 2002-04-18 Brady Bobby R. Steam distribution ring for spinning machines
US6926508B2 (en) 2000-06-23 2005-08-09 Invista North America Sarl Steam distribution ring for spinning machines
KR100732097B1 (ko) 2000-06-23 2007-06-27 이 아이 듀폰 디 네모아 앤드 캄파니 증기 피복 장치 및 방법
US9777637B2 (en) 2012-03-08 2017-10-03 General Electric Company Gas turbine fuel flow measurement using inert gas

Also Published As

Publication number Publication date
FR2204500A1 (enrdf_load_stackoverflow) 1974-05-24
DE2353824A1 (de) 1974-05-09
FR2204500B1 (enrdf_load_stackoverflow) 1976-06-18
DE2353824B2 (de) 1976-09-30
GB1443729A (en) 1976-07-21
JPS4975817A (enrdf_load_stackoverflow) 1974-07-22
BE806562A (fr) 1974-04-26
NL156452B (nl) 1978-04-17
NL7314772A (enrdf_load_stackoverflow) 1974-05-01
JPS5021564B2 (enrdf_load_stackoverflow) 1975-07-24
AR200744A1 (es) 1974-12-13
CA967316A (en) 1975-05-13

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