EP0129367A2 - Spinnplatte für das Schmelzspinnen und Verfahren zur Herstellung derselben - Google Patents

Spinnplatte für das Schmelzspinnen und Verfahren zur Herstellung derselben Download PDF

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Publication number
EP0129367A2
EP0129367A2 EP84303802A EP84303802A EP0129367A2 EP 0129367 A2 EP0129367 A2 EP 0129367A2 EP 84303802 A EP84303802 A EP 84303802A EP 84303802 A EP84303802 A EP 84303802A EP 0129367 A2 EP0129367 A2 EP 0129367A2
Authority
EP
European Patent Office
Prior art keywords
plate
nozzle plate
pipe
nozzle
hole
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.)
Granted
Application number
EP84303802A
Other languages
English (en)
French (fr)
Other versions
EP0129367B1 (de
EP0129367A3 (en
Inventor
Kiyoshi Takazawa
Takayuki Izumi
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.)
Tonen General Sekiyu KK
Original Assignee
Toa Nenryo Kogyyo KK
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 Toa Nenryo Kogyyo KK filed Critical Toa Nenryo Kogyyo KK
Publication of EP0129367A2 publication Critical patent/EP0129367A2/de
Publication of EP0129367A3 publication Critical patent/EP0129367A3/en
Application granted granted Critical
Publication of EP0129367B1 publication Critical patent/EP0129367B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • 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

Definitions

  • the present invention relates to a spinneret plate provided with a spinning nozzle which is most suitably employed in melt spinning such as the spinning of pitch carbon fibers.
  • each nozzle hold provided in the spinneret plate should be sufficiently small and have a smooth inner surface and a uniform inner diameter, i.e., a uniform aspect ratio.
  • the nozzle holes are generally formed by boring through a nozzle plate using a drill or an electron beam.
  • the method in which boring is effected using a drill encounters various problems as the nozzle hole diameter decreases.
  • the first of the problems is that it is difficult to machine the nozzle holes to a high degree of accuracy. More specifically, the drill itself has a tendency to oscillate when rotating.
  • the drill oscillates owing to drilling resistance, resulting in a hole which had different diameters at the start of drilling and the end of drilling, as shown in Fig. 1.
  • the edge of the drill blunts faster, resulting in a marked reduction in drilling capacity.
  • the electron beam method has been proposed in order to overcome these disadvantages with the boring method using a drill.
  • This method has the disadvantage that the electron beam remains inside the hole during the boring to form a hole whose inner part is expanded, as shown in Fig. 2, so that a nozzle with such a hole would degrade the orientation of the fiber.
  • a spinneret plate which has a plurality of nozzles, each with a smooth inner surface as well as a uniform hole diameter so that it is able to spin a fine fiber, such as a pitch carbon fiber, over a long period of time.
  • the spinneret plate comprises a metal nozzle plate having at least one hole formed therein and a metal hollow tube or pipe press fit mounted in said hole.
  • the upper and lower ends of the pipe are shaped to conform to the inlet and outlets of the nozzle plate.
  • the press fitting procedure may be achieved by heating the nozzle plate, preferably composed of steel, inserting the hollow pipe, also preferably composed of steel, into the hole, and thereafter cooling the plate thereby producing a pipe press fit mounted in the nozzle plate hole.
  • a spinneret plate 1 constructed in accordance with the present invention in the embodiment shown in Fig. 3, comprises a nozzle plate 2 of a predetermined thickness, and a hollow tube or pipe 4 of a desired diameter which is mounted in or attached to the nozzle plate 2 by press fitting or the like, into a hole formed in the plate.
  • the interior of the pipe 4 defines the nozzle hole for the spinneret.
  • the nozzle plate 2 is made of a stainless steel plate (SUS 304), and typically has a thickness of 4 mm when melt spinning pitch carbon fibers or the like.
  • the hollow pipe 4 may also be made of a stainless steel and, by way of example, may have the following sizes: inner diameter of 0.55 mm and an outer diameter of 1.5 mm.
  • the nozzle holes formed by the hollow pipes 4 can be disposed in any desired arrangement, they preferably are arranged in one or more concentric rows in the circumferential direction around the center of nozzle plate 2, when a melt spinning pitch carbon fibers, for example.
  • Figs. 4 and 5 Spinneret plates la and lb in accordance with other embodiments of the invention are illustrated in Figs. 4 and 5.
  • the hollow pipe 4 mounted in nozzle plate 2 the pipe 4 does extend through the entire thickness of the nozzle plate 2, but is provided through substantial portion (e.g., about half) of the thickness of the nozzle plate 2 on the outlet side thereof.
  • An enlarged, tapered inlet 6 in the upstream side of the nozzle plate 2 guides the molten spinning material into the nozzle hole defined by the hollow pipe 4.
  • the spinneret plate lb shown in Fig. 5 has a structure substantially similar to that of the spinneret plate la of Fig. 4.
  • the spinneret plate lb differs from the spinneret plate la in that the hollow pipe 4 projects slightly beyond the outlet surface of the nozzle plate 2 so as to form a projecting nozzle.
  • the spinneret plate lb with such a projecting nozzle provides an excellent shedding effect between the molten spinning material and the spinneret plate.
  • the nozzle plate 2 is provided with a preliminary hole 4' bored at the position at which the spinning nozzles is to be formed, as illustrated in 6(a).
  • the hollow pipe 4 is press-fitted into the prepared hole 4', as illustrated in 6(b).
  • the press-fitting operation may be carries out as follows.
  • a stainless steel pipe with an outer diameter of 1.5 mm and an inner diameter of 0.55 mm, for example, is employed as the hollow pipe 4
  • the preliminary hole 4' is finished so as to have an inner diameter of 1.5 mm, and the nozzle plate 2 is heated to between 150 and 300°C to expand the hole slightly.
  • the hollow pipe 4 is maintained at room temperature, or is cooled at lower temperature and is inserted into the preliminary hole 4', and then the nozzle plate 2 is cooled resulting in an interference fit. Subsequently, if the hollow pipe 4 projects from the nozzle plate 2, the projecting parts of the hollow pipe 4 are ground so that the end of the hollow pipe 4 is flush with the upper and lower surfaces of the nozzle plate 2, as illustrated in 6(c).
  • Fig. 7 illustrates the method of manufacturing the spinneret plate of Fig. 4.
  • the preliminary hole illustrated in 7(a) formed in the nozzle plate 2 may be formed: by drilling a small-diameter part 4' through the plate 2 and then enlarging the inlet side of the hole at 4''' and tapering the section between 4' and 4''' forming transition section 4".
  • the hollow pipe 4 is press-fitted into the small-diameter part 4 of the preliminary hole in the same way as above method described with reference to Fig. 6, resulting in the assembly illustrated in 7(b).
  • the part of the hollow pipe 4 projecting upward from the small-diameter part 4 1 of the preliminary hole is then expanded toward the transition part 4" of the preliminary hole to bring it into close contact with the wall surface of the transition part 4" (see Fig. 7(c)). Then the part of the hollow pipe 4 projecting beyond the outlet side of the nozzle plate 2 is ground so that the end of the hollow pipe 4 is flush with the surface of the nozzle plate 2.
  • the part of the hollow pipe 4 in close contact with the transition part 4'" of the preliminary hole can be ground by-a special tip to provide a smoother transition from section 4'" to the passage in nozzle 4.
  • the large-diameter part 4'" and the transition part 4" in combination form the inlet hole 6 as illustrated in 7(d).
  • Fig. 8 illustrates the method of manufacturing the spinneret plate lb with a projecting nozzle.
  • the step of machining the preliminary hole in the nozzle plate 2 and the step of press-fitting the hollow pipe are similar to those described with reference to Fig. 7.
  • This method differs from the previous method only in that the hollow pipe 4 projects further beyond the outlet side of the nozzle plate 2.
  • the upper end of the thus press-fitted hollow pipe 4 is expanded toward the transition part of the preliminary hole.
  • brazing 8 is applied to the outer peripheral portion of the projecting part of the hollow pipe 4 (see Fig. 8c). This brazing operation may be effected by a conventional method, e.g., by heating in an electric furnace.
  • both the part of the hollow pipe projecting from the outlet side of the nozzle plate 2 and the brazed part of the hollow pipe 4 are ground to a predetermined configuration.
  • the part of the hollow pipe 4 in close contact with the transition part of the prepared hole can be ground by a special tip to cut off the bent part forming the plate lb illustrated in 8d.
  • the present invention thus provides spinning nozzle a ready-made hollow pipe which has excellent roundness and straightness. Therefore it is possible to provide an accurate spinneret plate which has a spinning nozzle with an extremely smooth inner surface and a uniform aspect ratio. Further, according to the invention, it is possible to provide a multi-nozzle spinneret plate provided with a plurality of such accurate nozzle holes.
  • the employment-of the spinneret plate in accordance with the present invention makes it possible to spin pitch carbon fibers or the like stably over a long period of time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
EP19840303802 1983-06-16 1984-06-05 Spinnplatte für das Schmelzspinnen und Verfahren zur Herstellung derselben Expired EP0129367B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10672483A JPS602704A (ja) 1983-06-16 1983-06-16 溶融紡糸用紡糸口金及びその製造法
JP106724/83 1983-06-16

Publications (3)

Publication Number Publication Date
EP0129367A2 true EP0129367A2 (de) 1984-12-27
EP0129367A3 EP0129367A3 (en) 1985-04-24
EP0129367B1 EP0129367B1 (de) 1988-10-26

Family

ID=14440887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840303802 Expired EP0129367B1 (de) 1983-06-16 1984-06-05 Spinnplatte für das Schmelzspinnen und Verfahren zur Herstellung derselben

Country Status (3)

Country Link
EP (1) EP0129367B1 (de)
JP (1) JPS602704A (de)
DE (1) DE3474843D1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4687433A (en) * 1985-03-28 1987-08-18 Ngk Insulators, Ltd. Die for extruding ceramic honeycomb structural bodies
EP0392949A1 (de) * 1989-04-14 1990-10-17 Devtex Drehbarer und hohler Faserverdichter und Verfahren zu dessen Herstellung
WO2000055400A1 (de) * 1999-03-14 2000-09-21 Klaus Rennebeck Spinndüse
WO2001020064A1 (en) * 1999-08-19 2001-03-22 Jeong Sik Kim Spinning nozzle, spinning nipple incorporating the spinning nozzle therein, and method for manufacturing both the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62238808A (ja) * 1986-04-08 1987-10-19 Risuron:Kk 押出し成型機における合成樹脂細糸の製造法及び装置
JPS62257412A (ja) * 1986-05-02 1987-11-10 Risuron:Kk 押出し成型機における合成樹脂細糸の製造装置
CA2041416A1 (en) * 1990-09-19 1992-03-20 Nimet C. Hatcher Spinneret

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB711038A (en) * 1949-11-23 1954-06-23 Onderzoekings Inst Res Improvements in or relating to the melt spinning of artificial filaments from high polymer substances and to spinnerets for use therein
GB749750A (en) * 1952-10-10 1956-05-30 Johnson Matthey Co Ltd Improvements in and relating to spinnerets
DE1102340B (de) * 1956-10-03 1961-03-16 Bayer Ag Verfahren zum Abgleichen der Durchflussmengen von Kapillaren
GB1126609A (en) * 1966-07-20 1968-09-11 Du Pont Spinneret
GB1130430A (en) * 1965-07-22 1968-10-16 Uniroyal Inc Improvements relating to spinnerets and their manufacture

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS554300U (de) * 1979-07-17 1980-01-11
JPS57101003A (en) * 1980-12-09 1982-06-23 Tanaka Kikinzoku Kogyo Kk Spinneret

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB711038A (en) * 1949-11-23 1954-06-23 Onderzoekings Inst Res Improvements in or relating to the melt spinning of artificial filaments from high polymer substances and to spinnerets for use therein
GB749750A (en) * 1952-10-10 1956-05-30 Johnson Matthey Co Ltd Improvements in and relating to spinnerets
DE1102340B (de) * 1956-10-03 1961-03-16 Bayer Ag Verfahren zum Abgleichen der Durchflussmengen von Kapillaren
GB1130430A (en) * 1965-07-22 1968-10-16 Uniroyal Inc Improvements relating to spinnerets and their manufacture
GB1126609A (en) * 1966-07-20 1968-09-11 Du Pont Spinneret

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4687433A (en) * 1985-03-28 1987-08-18 Ngk Insulators, Ltd. Die for extruding ceramic honeycomb structural bodies
EP0392949A1 (de) * 1989-04-14 1990-10-17 Devtex Drehbarer und hohler Faserverdichter und Verfahren zu dessen Herstellung
FR2645880A1 (de) * 1989-04-14 1990-10-19 Devtex
WO2000055400A1 (de) * 1999-03-14 2000-09-21 Klaus Rennebeck Spinndüse
WO2001020064A1 (en) * 1999-08-19 2001-03-22 Jeong Sik Kim Spinning nozzle, spinning nipple incorporating the spinning nozzle therein, and method for manufacturing both the same

Also Published As

Publication number Publication date
DE3474843D1 (en) 1988-12-01
EP0129367B1 (de) 1988-10-26
JPS602704A (ja) 1985-01-09
EP0129367A3 (en) 1985-04-24

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