WO2022264606A1 - Filière, dispositif de fabrication de fibres de verre et procédé de fabrication de fibres de verre - Google Patents

Filière, dispositif de fabrication de fibres de verre et procédé de fabrication de fibres de verre Download PDF

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Publication number
WO2022264606A1
WO2022264606A1 PCT/JP2022/013933 JP2022013933W WO2022264606A1 WO 2022264606 A1 WO2022264606 A1 WO 2022264606A1 JP 2022013933 W JP2022013933 W JP 2022013933W WO 2022264606 A1 WO2022264606 A1 WO 2022264606A1
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WIPO (PCT)
Prior art keywords
cooling
nozzle
nozzles
glass
glass fiber
Prior art date
Application number
PCT/JP2022/013933
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English (en)
Japanese (ja)
Inventor
禅 松浦
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日本電気硝子株式会社
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Filing date
Publication date
Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Publication of WO2022264606A1 publication Critical patent/WO2022264606A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/08—Bushings, e.g. construction, bushing reinforcement means; Spinnerettes; Nozzles; Nozzle plates
    • C03B37/083—Nozzles; Bushing nozzle plates

Definitions

  • the present invention relates to improvements in glass fiber manufacturing technology.
  • Circular cross-section glass fibers whose cross-sections are perfect circles and modified cross-section glass fibers whose cross-sections are non-circular such as flattened oval or elliptical cross-sections have a high reinforcing effect when mixed with resin and combined. It is used in various fields because it can achieve
  • modified cross-section glass fibers Even if a nozzle having a flat nozzle hole is used to produce modified cross-section glass fibers, if the viscosity of the molten glass drawn out from the nozzle is too low, the surface tension of the molten glass directly below the tip of the nozzle will cause the molten glass to expand. The cross section of the glass fiber is likely to be rounded, making it impossible to produce the desired modified cross-section glass fiber. Moreover, even in the case of producing circular-cross-section glass fibers, it is possible to suppress breakage of the glass fibers by appropriately cooling the molten glass.
  • an object of the present invention is to stably produce a large number of glass fibers having a desired shape.
  • a bushing according to the present invention includes a base plate extending in a predetermined direction and having a plurality of cooling regions in which a cooling member for cooling molten glass can be arranged; and a plurality of second nozzles provided in a second region of the base plate along the cooling region,
  • the average distance between the cooling zone and the first zone is less than the average distance between the cooling zone and the second zone, and the average length of the first nozzles is the average length of the second nozzles. It is characterized by being shorter than it is long.
  • the productivity of the glass fiber can be improved, and a large number of glass fibers can be obtained at once, so that a large count strand can be produced.
  • the second nozzle located away from the cooling region is longer than the first nozzle, it is possible to reduce variations in molten glass cooling efficiency caused by different distances from the cooling member. . Therefore, it is possible to appropriately adjust the viscosity of the molten glass during molding, and to stably mold the glass fiber.
  • the base plate further comprises a plurality of third nozzles provided in a third region along the cooling region, wherein the average distance between the cooling region and the second region is , preferably the mean distance between the cooling zone and the third zone is less than the mean length of the second nozzles is less than the mean length of the third nozzles.
  • the first nozzle and the second nozzle have a flat-shaped nozzle hole at the tip from which the molten glass flows.
  • the length of the cooling member from the base plate is preferably longer than that of the first nozzle and the second nozzle.
  • a glass fiber manufacturing method according to the present invention is characterized by manufacturing glass fibers using the glass fiber manufacturing apparatus described above. According to such a configuration, it is possible to obtain the same effect as the configuration already described.
  • the molten glass is preferably E glass.
  • the viscosity is 10 3.5 dPa ⁇ s or less, the viscosity of the molten glass does not become too high, so that the moldability of the glass fibers can be maintained well. Further, when the viscosity is 10 2.0 dPa ⁇ s or more, the viscosity of the molten glass does not become too low, so that the force of the molten glass to return to a circular cross section due to the surface surface force is reduced when producing the modified cross-section glass fiber. It is weakened, and the flatness ratio (major dimension/minor dimension) of the glass fiber can be increased.
  • FIG. 1 is a cross-sectional view showing a glass fiber manufacturing apparatus according to a first embodiment of the present invention.
  • FIG. 2 is an enlarged cross-sectional view showing the periphery of the nozzle of the bushing of FIG.
  • FIG. 3 is an enlarged bottom view showing the vicinity of the nozzle of the bushing of FIG.
  • FIG. 4 is an enlarged bottom view showing the vicinity of the nozzle of the bushing of the glass fiber manufacturing apparatus according to the second embodiment of the present invention.
  • FIG. 5 is an enlarged cross-sectional view showing the vicinity of a nozzle of a bushing of a glass fiber manufacturing apparatus according to a third embodiment of the present invention.
  • FIG. 1 is a cross-sectional view showing a glass fiber manufacturing apparatus according to a first embodiment of the present invention.
  • FIG. 2 is an enlarged cross-sectional view showing the periphery of the nozzle of the bushing of FIG.
  • FIG. 3 is an enlarged bottom view showing the vicinity of the nozzle of the bushing of FIG
  • FIG. 6 is an enlarged bottom view showing the vicinity of the nozzle of the bushing of the glass fiber manufacturing apparatus according to the third embodiment of the present invention.
  • FIG. 7 is an enlarged cross-sectional view showing the periphery of a nozzle of a bushing of a glass fiber manufacturing apparatus according to a fourth embodiment of the present invention.
  • FIG. 8 is an enlarged bottom view showing the vicinity of the nozzle of the bushing of the glass fiber manufacturing apparatus according to the fourth embodiment of the present invention.
  • a glass fiber manufacturing apparatus 10 is a manufacturing apparatus for circular cross-section glass fibers, and includes a glass melting furnace 1, a forehearth 2 connected to the glass melting furnace 1, and the forehearth 2 It has a feeder 3 connected to it.
  • the X direction and the Y direction are horizontal directions
  • the Z direction is the vertical direction (the same applies hereinafter).
  • the molten glass G is supplied from the glass melting furnace 1 through the forehearth 2 to the feeder 3 and stored in the feeder 3 .
  • FIG. 1 shows an example in which one glass melting furnace 1 is connected to one feeder 3 , a plurality of feeders 3 may be connected to the glass melting furnace 1 .
  • a clarification furnace may be provided between the glass melting furnace 1 and the forehearth 2 .
  • the molten glass G is made of E glass, but it may be made of other glass materials such as D glass, S glass, AR glass, and C glass.
  • a bushing 4 is arranged at the bottom of the feeder 3 .
  • the bushing 4 is attached to the feeder 3 via a bushing block or the like.
  • the bottom of the bushing 4 is composed of a base plate 41 as shown in FIG. 2, and the base plate 41 is provided with a plurality of nozzles 5 . Further, the base plate 41 is provided with a plurality of cooling regions S extending in the Y direction, which is one predetermined direction, in which the cooling pipes 6 can be arranged.
  • a cooling pipe 6 is provided in the cooling area S as a cooling member.
  • Molten glass G stored in the feeder 3 is drawn downward from a plurality of nozzles 5 provided on the base plate 41 of the bushing 4 to produce glass fibers (monofilaments) Gm.
  • the viscosity of the molten glass G at the molding temperature is set within the range of 10 2.0 to 10 3.5 dPa ⁇ s (preferably 10 2.5 to 10 3.3 dPa ⁇ s).
  • the viscosity of the molten glass G at the molding temperature is the viscosity of the molten glass G at the position where it flows into the nozzle 5 .
  • a sizing agent is applied to the surface of the glass fibers Gm by an applicator (not shown), and 100 to 10,000 fibers are spun into one strand Gs.
  • the count of the strand Gs depends on the number of spun glass fibers Gm, and the greater the number of the glass fibers Gm, the larger the count of the strand Gs.
  • the spun strand Gs is wound around a collet 7 of a winding device as a fiber bundle Gr.
  • the strand Gs is cut into a predetermined length of about 1 to 20 mm, for example, and used as chopped strands.
  • At least part of the glass melting furnace 1, the forehearth 2, the feeder 3, the bushing 4, the nozzle 5, and the cooling pipe 6 is made of expensive material platinum or platinum alloy (for example, platinum rhodium alloy).
  • feeder 3 and bushing 4 may be heated by electric heating or the like.
  • the nozzle 5 includes a nozzle wall 51 and a perfectly circular nozzle hole 52 defined by the nozzle wall.
  • the thickness of the nozzle wall 51 is 0.1-10 mm, and the diameter of the nozzle hole 52 is in the range of 0.5-15 mm.
  • the nozzles 5 are evenly spaced along the X and Y directions. The interval between the nozzles 5 is, for example, about 1 to 20 mm.
  • nozzles 5 It is preferable that 200 to 10,000 nozzles 5 are arranged on the base plate 41 . By arranging the above number of nozzles 5, a strand Gs with a large count can be obtained. In addition, it is preferable that 1500 or more nozzles 5 are arranged on the base plate 41 .
  • the cooling pipe 6 exerts a cooling action by circulating cooling water F as a fluid inside it.
  • the cooling pipe 6 is a plate-like body, and a plurality of cooling pipes 6 are arranged so that the plate surface extends along a certain direction (Y direction).
  • the cooling pipe 6 is provided separately from the cooling area S of the base plate 41 in this embodiment, it may be provided integrally with the bottom of the bushing 4 .
  • the cooling pipe 6 may be a circular tubular body. The height position of the cooling pipe 6 can be appropriately adjusted according to the cooling conditions of the molten glass G.
  • the cooling pipe 6 may be arranged above the tip of the nozzle 5 so as not to directly face the molten glass G drawn from the nozzle 5, or may be arranged above the nozzle 5 and the molten glass G drawn from the nozzle 5. may be arranged so as to straddle both sides.
  • the cooling member is not limited to the cooling pipe 6, and may be a cooling fin or the like that induces an air flow and exerts a cooling effect.
  • the base plate 41 has a plurality of cooling areas S extending in the Y direction in which the cooling pipes 6 are arranged.
  • a plurality of cooling regions S are arranged at predetermined intervals in the X direction.
  • the cooling area S is in a flat state so that the cooling pipes 6 can be arranged.
  • a plurality of nozzles 5 are arranged between the cooling regions S.
  • the first area L1 and the second area L2 are provided with the same number of nozzles 5 (first nozzles 5a in the first area L1 and second nozzles 5b in the second area L2).
  • the first nozzle 5a is composed of a nozzle wall 51a
  • the second nozzle 5b is composed of a nozzle wall 51b.
  • the length H1 of the first nozzle 5a is shorter than the length H2 of the second nozzle 5b.
  • the molten glass G drawn from the first nozzle 5a near the cooling pipe 6 is easily cooled by the cooling pipe 6.
  • the molten glass G pulled out from the second nozzle 5 b located far from the cooling pipe 6 is difficult to be cooled by the cooling pipe 6 .
  • the inventors of the present invention have found that cooling variations can be suppressed by previously lowering the temperature of the molten glass G drawn out from the second nozzle 5b.
  • the inventors of the present invention found that the longer the time for the molten glass G to flow through the nozzle 5, the lower the temperature of the molten glass G. Therefore, by setting the relationship of the lengths of the nozzles 5 as described above, the variation in cooling efficiency can be reduced.
  • the nozzle 5 can be cooled while reducing variations in cooling. manufacturing cost (amount of platinum used) can be reduced.
  • the length H3 of the cooling pipe 6 from the base plate 41 is longer than the length H1 of the first nozzle 5a and the length H2 of the second nozzle 5b. By doing so, the molten glass G drawn out from the first nozzle 5 a and the second nozzle 5 b can be efficiently cooled by the cooling pipe 6 .
  • the nozzles 5 are arranged on the base plate 42 of the bushing 14 in an arrangement different from that of the base plate 41 of the first embodiment.
  • the nozzles 5 are arranged in a zigzag pattern.
  • the second nozzles 5b arranged in the second region L2 are cooled more efficiently by the cooling pipes 6.
  • the cooling efficiency of the second nozzle 5b may slightly decrease due to the blockage by the first nozzle 5a.
  • the second nozzle 5b is not blocked by the first nozzle 5a, so it is cooled more efficiently.
  • the first nozzle 5a is composed of a nozzle wall 51a
  • the second nozzle 5b is composed of a nozzle wall 51b
  • the third nozzle 5c is composed of a nozzle wall 51c.
  • the length H1 of the first nozzle 5a is shorter than the length H2 of the second nozzle 5b
  • the length H2 of the second nozzle 5b is greater than the length H4 of the third nozzle 5c. shorter than
  • the length H3 of the cooling pipe 6 from the base plate 43 is longer than the length H1 of the first nozzle 5a, the length H2 of the second nozzle 5b, and the length H4 of the third nozzle 5c. . By doing so, the molten glass G drawn out from the first nozzle 5a, the second nozzle 5b and the third nozzle 5c can be efficiently cooled by the cooling pipes 6.
  • FIG. 1 The length H3 of the cooling pipe 6 from the base plate 43 is longer than the length H1 of the first nozzle 5a, the length H2 of the second nozzle 5b, and the length H4 of the third nozzle 5c.
  • a plurality of nozzle regions L4 and L5 are arranged in parallel and spaced apart in the X direction between the adjacent cooling regions S.
  • the nozzle 5 has a flat-shaped (oval in this embodiment) nozzle hole 53 at the tip from which the molten glass flows.
  • the major axis direction of the nozzle hole 53 coincides with the Y direction
  • the minor axis direction of the nozzle hole 53 coincides with the X direction.
  • the cross-sectional shape of the nozzle hole 53 may be an elliptical shape other than an oval shape.
  • a bushing 34 having a flat-shaped (elliptical in this embodiment) nozzle hole 53 is used for manufacturing modified cross-section glass fibers. Even when the molten glass G is pulled out from the nozzle hole 53 having such a shape, the cross section of the glass fiber tends to become a perfect circle due to the surface tension. Therefore, conventionally, it was necessary to increase the number of cooling members 6 . Therefore, by setting the length relationship of the nozzles 5 as described above, the second nozzles 5e in the second region L5 can also be efficiently cooled, so the number of cooling members 6 can be reduced.
  • the nozzle 5 can be cooled while reducing variations in cooling. manufacturing cost (amount of platinum used) can be reduced.
  • the length H7 of the cooling pipe 6 from the base plate 44 is longer than the length H5 of the first nozzle 5d and the length H6 of the second nozzle 5e. By doing so, the molten glass G drawn out from the first nozzle 5 d and the second nozzle 5 e can be efficiently cooled by the cooling pipe 6 .
  • the number of nozzles 5 included in the first area L4 and the second area L5 is preferably 10 to 100 or less. Also, the total number of nozzles 5 arranged on the base plate 44 is preferably 400 to 4000 or less.
  • the base plate extends in a predetermined direction and has a plurality of cooling regions in which cooling members for cooling molten glass can be arranged, and the base plate is provided in a first region along the cooling regions. and a plurality of second nozzles provided in a second region that is a region along the cooling region in the base plate, the average distance between the cooling region and the first region is less than the average distance between the cooling zone and the second zone, and the average length of the first nozzles is smaller than the average length of the second nozzles.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

L'invention concerne une filière comprenant : une plaque de base équipée d'une pluralité de régions de refroidissement qui s'étendent dans une direction prédéfinie et sur laquelle peut être placé un élément de refroidissement pour refroidir du verre fondu ; une pluralité de premières buses disposées dans une première région, qui est une région le long de la région de refroidissement, de la plaque de base ; et une pluralité de secondes buses disposées dans une seconde région, qui est une région le long de la région de refroidissement, de la plaque de base, ladite filière étant caractérisée en ce que la distance moyenne entre la région de refroidissement et la première région est inférieure à la distance moyenne entre la région de refroidissement et la seconde région, et la longueur moyenne des premières buses est inférieure à la longueur moyenne des secondes buses.
PCT/JP2022/013933 2021-06-14 2022-03-24 Filière, dispositif de fabrication de fibres de verre et procédé de fabrication de fibres de verre WO2022264606A1 (fr)

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JP2021098566A JP2022190302A (ja) 2021-06-14 2021-06-14 ブッシング、ガラス繊維製造装置、及びガラス繊維製造方法
JP2021-098566 2021-06-14

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WO2022264606A1 true WO2022264606A1 (fr) 2022-12-22

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JP (1) JP2022190302A (fr)
TW (1) TW202313497A (fr)
WO (1) WO2022264606A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5782138A (en) * 1980-11-12 1982-05-22 Nitto Boseki Co Ltd Preparation of glass fiber
JPH0781968A (ja) * 1993-09-10 1995-03-28 Tanaka Kikinzoku Kogyo Kk ブッシングベースプレートの製造方法
JP2002128538A (ja) * 2000-10-18 2002-05-09 Nitto Boseki Co Ltd ガラス繊維用ブッシング
JP2009263211A (ja) * 2008-03-31 2009-11-12 Nippon Electric Glass Co Ltd 異形断面ガラス繊維、及びその製造方法並びに製造装置
JP2010083750A (ja) * 2008-09-03 2010-04-15 Nippon Electric Glass Co Ltd ガラス繊維製造装置および製造方法
JP2010150127A (ja) * 2008-11-20 2010-07-08 Nippon Electric Glass Co Ltd ガラス繊維製造装置およびガラス繊維製造方法
JP2017226579A (ja) * 2016-06-23 2017-12-28 日本電気硝子株式会社 異形断面ガラス繊維製造用ノズル並びに異形断面ガラス繊維製造装置及びその製造方法
JP2020001956A (ja) * 2018-06-27 2020-01-09 日本電気硝子株式会社 ブッシング、及びガラス繊維の製造方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5782138A (en) * 1980-11-12 1982-05-22 Nitto Boseki Co Ltd Preparation of glass fiber
JPH0781968A (ja) * 1993-09-10 1995-03-28 Tanaka Kikinzoku Kogyo Kk ブッシングベースプレートの製造方法
JP2002128538A (ja) * 2000-10-18 2002-05-09 Nitto Boseki Co Ltd ガラス繊維用ブッシング
JP2009263211A (ja) * 2008-03-31 2009-11-12 Nippon Electric Glass Co Ltd 異形断面ガラス繊維、及びその製造方法並びに製造装置
JP2010083750A (ja) * 2008-09-03 2010-04-15 Nippon Electric Glass Co Ltd ガラス繊維製造装置および製造方法
JP2010150127A (ja) * 2008-11-20 2010-07-08 Nippon Electric Glass Co Ltd ガラス繊維製造装置およびガラス繊維製造方法
JP2017226579A (ja) * 2016-06-23 2017-12-28 日本電気硝子株式会社 異形断面ガラス繊維製造用ノズル並びに異形断面ガラス繊維製造装置及びその製造方法
JP2020001956A (ja) * 2018-06-27 2020-01-09 日本電気硝子株式会社 ブッシング、及びガラス繊維の製造方法

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JP2022190302A (ja) 2022-12-26
TW202313497A (zh) 2023-04-01

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