TW202311181A - Glass fiber manufacturing apparatus and glass fiber manufacturing method - Google Patents

Abstract

A glass fiber manufacturing device 11 is provided with a feeder 12 that circulates molten glass MG, and a bushing 13 that is positioned below the feeder 12 and has a plurality of nozzles N for discharging the molten glass MG. The glass fiber manufacturing device 11 is provided with a heat-generating member 14 that generates heat by means of energization. The heat-generating member 14 of the glass fiber manufacturing device 11 has a heat-generating part 14a that is positioned in the flow path of the molten glass MG, between the feeder 12 and the bushing 13.

Description

Glass fiber manufacturing device, and glass fiber manufacturing method

The invention relates to a glass fiber manufacturing device and a glass fiber manufacturing method.

As described in Patent Document 1, glass fibers can be produced using a manufacturing device equipped with a feeder and a bushing, wherein the feeder flows molten glass, and the bushing is arranged below the feeder and has a hood for the molten glass to flow out. Multiple nozzles. In such a glass fiber manufacturing apparatus, a plurality of glass filaments can be formed by letting molten glass flow out from each nozzle of the bushing.

prior art literature patent documents Patent Document 1: Japanese Patent Laid-Open No. 2012-091954

The problem to be solved by the invention In the conventional glass fiber manufacturing apparatus described above, when the temperature of the molten glass supplied from the feeder to the bush is low, it is necessary to heat the bush by energizing the bush to heat the molten glass. However, at this time, the molten glass in the bushing may be insufficiently heated, or the temperature of the nozzle of the bushing may rise excessively due to energization, so there is a risk that the molding of the glass strand may become unstable.

An object of the present invention is to provide a glass fiber manufacturing apparatus and a glass fiber manufacturing method capable of stably forming glass filaments.

means to solve problems A glass fiber manufacturing device that solves the above-mentioned problems, comprising a feeder, a bushing, and a heat generating member; the feeder circulates molten glass; the bushing is disposed below the feeder, and has a A plurality of nozzles flowing out; the heating member generates heat by energization; the heating member has a heating portion arranged in the flow path of the molten glass between the feeder and the bushing.

In the manufacturing apparatus of the said glass fiber, the said heat generating part of the said heat generating member may consist of a plate material, and may be installed so that it may straddle the flow path of the said molten glass. The said heat generating part of the said heat generating member may have a through-hole through which the said molten glass flows.

In the manufacturing apparatus of the said glass fiber, the said heat generating part of the said heat generating member may have a plurality of said through-holes, and it may be provided so that it may form the some flow part which differs in aperture ratio.

The glass fiber manufacturing apparatus may be: the heat generating member includes a first heat generating member and a second heat generating member; the second heat generating member is arranged downstream of the first heat generating member and is separated from the first heat generating member.

The manufacturing apparatus of the above-mentioned glass fiber may also be: the above-mentioned heating element includes a first heating element and a second heating element; the second heating element is arranged on the downstream side of the first heating element and is separated from the first heating element; The above-mentioned heating part of the first heating member and the above-mentioned heating part of the second heating member are composed of plate materials, which are arranged across the flow path of the above-mentioned molten glass; 2. The heat generating part of the heat generating member has a through hole through which the molten glass flows.

The glass fiber manufacturing apparatus may be: the first heat generating member and the second heat generating member each have a plurality of circulation parts with different aperture ratios; The portions are arranged such that the opening ratios are different from each other along the flow direction of the molten glass.

In the manufacturing apparatus of the said glass fiber, the said heat generating member and the said bushing may be arrange|positioned separately.

The manufacturing apparatus of the said glass fiber may further be equipped with the insulating member arrange|positioned between the said heat generating member and the said bushing.

A glass fiber manufacturing method that solves the above-mentioned problems, comprising a forming step of forming glass filaments using a glass fiber manufacturing device; the glass fiber manufacturing device includes a feeder, a bushing, and a heat generating member; Circulation; the above-mentioned bushing is arranged under the above-mentioned feeder, and has a plurality of nozzles for the above-mentioned molten glass to flow out; the above-mentioned heating element generates heat by energizing; the above-mentioned heating element has a heating part, which is arranged between the above-mentioned feeder and the above-mentioned The flow path of the above-mentioned molten glass between the bushes; in the above-mentioned forming step, the above-mentioned molten glass is heated by the above-mentioned heat generating member.

Invention effect According to the present invention, glass filaments can be stably formed.

(first embodiment) Hereinafter, a first embodiment of a glass fiber manufacturing apparatus and a glass fiber manufacturing method will be described with reference to the drawings. However, in the illustrations, a part of the configuration may be exaggerated or simplified for the convenience of explanation. Moreover, the dimension ratio about each part may differ from an actual thing.

As shown in FIG. 1 , the manufacturing apparatus 11 of glass fiber is provided with the feeder 12 which circulates molten glass MG, and the bushing 13 arrange|positioned below the feeder 12. As shown in FIG. The manufacturing apparatus 11 of glass fiber is equipped with the heat generating member 14 which generates heat by energization. The glass fiber manufacturing apparatus 11 of this embodiment is provided with the insulating member 15 arrange|positioned between the heat generating member 14 and the bushing 13. As shown in FIG.

＜Feeder 12＞ The feeder 12 of the manufacturing apparatus 11 of glass fiber supplies the molten glass MG produced by the glass melting furnace which is not shown in figure. The feeder 12 is made of refractory walls. The refractories constituting the refractory wall include, for example, electroformed bricks, densely sintered bricks, and the like. Examples of electroformed bricks include zirconia-based electroformed bricks, alumina-based electroformed bricks, alumina-zirconia-based electroformed bricks, alumina-zirconia-silica-based electroformed bricks, and the like. Densified sintered bricks include dense zircon bricks, dense chrome bricks, and the like.

The feeder 12 is equipped with the flow block 12a which forms the flow path which flows down molten-glass MG. The flow block 12a is also made of a refractory.

Examples of glass for molten glass MG include E glass (glass with an alkali content of 2% or less), D glass (low permittivity glass), AR glass (alkali-resistant glass), C glass (acid-resistant glass), M glass ( Glass with high elastic modulus), S glass (glass with high strength and high elastic modulus), T glass (glass with high strength and high elastic modulus), H glass (glass with high permittivity), NE glass (glass with low permittivity Glass). The density of glass is, for example, 2.0 to 3.0 g/cm ³ .

<Bushing 13> The bushing 13 of the manufacturing apparatus 11 of glass fiber has some nozzle N from which molten glass MG flows out. Glass strands GF are formed by each nozzle N of the bushing 13 .

The bushing 13 is equipped with the bushing main body 13a which supplies molten glass MG, and the bottom plate 13b provided in the bottom part of the bushing main body 13a. The upper part of the liner main body 13 a has a supply port which supplies molten glass MG from the feeder 12 . The bush 13 is supported by the feeder 12 via the support member S, for example.

The glass fiber manufacturing apparatus 11 of this embodiment is equipped with the bushing block 16 arrange|positioned at the lower side of the flow block 12a of the feeder 12. As shown in FIG. The liner block 16 forms the flow path of the molten glass MG between the feeder 12 and the liner 13 . Molten glass MG flowing down through the flow path formed by the bush block 16 is supplied to the bush main body 13a. The liner block 16 is made of, for example, the above-mentioned non-conductive refractory material.

The liner main body 13a may have a screen for preventing impurities from accumulating on the bottom plate 13b, a terminal for conducting electricity, or the like.

The bottom plate 13b is provided with a plurality of nozzles N. As shown in FIG. The number of nozzle holes in the bush 13 is preferably within a range of 100 to 10,000. The shape of the nozzle hole in each nozzle N of the liner 13 includes, for example, a circular shape, a flat shape having a long diameter and a short diameter, and the like.

As for the material of the bush main body 13a, the bottom plate 13b, and the nozzle N, a noble metal or a noble metal alloy is mentioned, for example. The noble metal is gold, silver, platinum, palladium, rhodium, iridium, ruthenium or osmium. From the viewpoint of improving durability, the materials of the bushing main body 13a, the bottom plate 13b, and the nozzle N are preferably platinum or a platinum alloy. Platinum alloys include, for example, platinum-rhodium alloys.

<Heating member 14> The heat generating member 14 of the manufacturing apparatus 11 of glass fiber has the heat generating part 14a arrange|positioned in the flow path of the molten glass MG between the feeder 12 and the bushing 13. The heat generating member 14 has a terminal 14b for conducting electricity connected to the heat generating portion 14a. The heat generating member 14 is disposed separately from the bush 13 . Specifically, the heat generating member 14 is arranged so as not to be in contact with the bush 13 .

The heat generating part 14a of the heat generating member 14 is comprised from a plate material, and it is provided so that it may straddle the flow path of molten-glass MG. The heat generation part 14a has at least one through-hole TH, and flows molten glass MG. In the present embodiment, the heat generating portion 14a has a plurality of through holes TH provided to form a plurality of circulation portions having different aperture ratios.

As shown in FIG. 2, the heat generating part 14a of this embodiment has two 1st circulation part A1, two 2nd circulation part A2, and one 3rd circulation part A3. Among these flow parts, the third flow part A3 is sandwiched between the two second flow parts A2, and the third flow part A3 and the two second flow parts A2 are sandwiched between the two first flow parts A1. between.

When the opening ratio of the first circulation part A1 is RA1 [%], the opening ratio of the second circulation part A2 is RA2 [%], and the opening ratio of the third circulation part A3 is RA3 [%], it can satisfy The relationship of RA1<RA3<RA2. The aperture ratio RA1 of the first flow portion A1 is, for example, within a range of not less than 1% and not more than 20%. The aperture ratio RA2 of the second passage portion A2 is, for example, within a range of more than 60% and not more than 90%. The opening ratio RA3 of the third passage portion A3 is, for example, within a range of more than 20% and not more than 60%.

The shape of the through-hole TH of the heat generating portion 14a includes, for example, a circular shape, an elliptical shape, a polygonal shape, a slit shape, and the like.

The terminals 14b are respectively connected to both sides of the heat generating part 14a. As shown in FIG. 1 , a pair of terminals 14 b is connected to a power source 17 .

The material of the heat generating member 14 is not particularly limited as long as it can be used as a resistance heating element, and examples thereof include metals and ceramics. Examples of the metal include molybdenum, platinum, and platinum alloys. Platinum alloys include, for example, platinum-rhodium alloys.

<Insulation member 15> As shown in FIGS. 1 and 3 , the insulating member 15 of the glass fiber manufacturing device 11 electrically insulates the heating member 14 and the bushing 13 . As shown in FIG. 3 , the overall shape of the insulating member 15 is, for example, a frame shape, and has a flow hole 15 a penetrating up and down. As for the material of the insulating member 15, a refractory etc. are mentioned, for example. Wherein, the insulating member 15 can be a single-layer structure or a multi-layer structure.

＜Constitution other than the above＞ The manufacturing apparatus 11 of glass fiber is equipped with the applicator and the bundler which are not shown in figure. The applicator applies a liquid sizing agent to the plurality of glass filaments GF pulled out from the bushing 13 . The bundler bundles a plurality of glass filaments GF coated with a bundler. A glass strand is obtained by bundling a plurality of glass filaments GF by a bundler. The glass strands are wound up by a winding device to obtain a silk cake wound with the glass strands.

＜Manufacturing method of glass fiber＞ Next, the manufacturing method of glass fiber and its main functions will be explained simultaneously.

The manufacturing method of glass fiber is equipped with the shaping|molding process which shapes glass fiber GF using the manufacturing apparatus 11 of glass fiber. In the forming step, molten glass MG is supplied from the feeder 12 to the bushing 13 . The flow path of the molten glass MG leading from the feeder 12 to the bushing 13 and the inside of the bushing main body 13 a of the bushing 13 are filled with the molten glass MG. In the forming step, the molten glass MG supplied through the bush 13 flows out from the nozzle N of the bush 13 to shape the glass filament GF.

The manufacturing apparatus 11 of glass fiber is equipped with the said heat generating member 14. As shown in FIG. According to this configuration, when the temperature of the molten glass MG flowing down from the feeder 12 is low, it can be heated and melted by the heat generating portion 14 a of the heat generating member 14 arranged in the flow path between the feeder 12 and the bushing 13 . Glass Mg. In this manner, molten glass MG heated to a predetermined temperature can be supplied to the bushing 13 . Therefore, molten glass MG can be stably flowed out from the nozzle N of the bushing 13 .

Moreover, since molten-glass MG can be heated by the heat-generating part 14a of the heat-generating member 14, the temperature of molten-glass MG which circulates in the feeder 12 can be lowered purposefully. Therefore, the feeder 12 can be suppressed from deteriorating due to high-temperature molten glass MG. Moreover, for example, when it is necessary to suppress the excessive temperature rise of the nozzle N, etc., and to limit energization of the bushing 13 to generate heat, the temperature of the molten glass MG in the bushing 13 can still be set to an appropriate temperature. Moreover, since the molten glass MG which flows into the liner 13 can be easily set to the temperature corresponding to the kind of glass, for example, it can also respond easily to manufacture of various kinds of glass fibers.

Glass strands can be obtained by bundling the glass filaments GF obtained in the above forming steps. Glass strands can be utilized as, for example, chopped strands cut to specific lengths. In addition, the glass strands can be utilized as abrasive fibers, rovings, yarns, mats, cloths, tapes, or fabrics, among others. Applications of the glass strands include, for example, vehicle applications, electronic material applications, building material applications, civil engineering applications, aircraft-related applications, shipbuilding applications, logistics applications, industrial machinery applications, and daily necessities applications.

＜Function and Effect＞ Next, operations and effects of the first embodiment will be described.

(1-1) The manufacturing apparatus 11 of glass fiber is provided with the feeder 12, the bushing 13, and the heating member 14; The feeder 12 circulates molten glass MG; The bushing 13 is arrange|positioned under the feeder 12, and has A plurality of nozzles N through which molten glass MG flows out; the heat generating member 14 generates heat by energization. The heat generating member 14 has the heat generating part 14a arrange|positioned in the flow path of the molten glass MG between the feeder 12 and the bushing 13. As shown in FIG.

According to this structure, molten glass MG can be stably flowed out from the nozzle N of the bushing 13 as mentioned above. Therefore, the glass filament GF can be stably formed.

(1-2) The heat generating part 14a of the heat generating member 14 in the manufacturing apparatus 11 of glass fiber is comprised from a plate material, and it is provided so that it may straddle the flow path of molten glass MG. The heat generating part 14a of the heat generating member 14 has a through-hole TH which makes molten glass MG flow. At this time, since the contact area between the heat generating part 14a of the heat generating member 14 and molten glass MG can be increased, for example, molten glass MG can be heated efficiently or the uniformity of the temperature of molten glass MG can be improved.

(1-3) The heat generating part 14a of the heat generating member 14 in the manufacturing apparatus 11 of glass fiber has several through-holes TH, and it is provided so that the several flow part which differs in aperture ratio may be formed. In this case, the flow of molten glass MG may be complicated. In this way, for example, the uniformity of the temperature of molten glass MG can be improved.

(1-4) In the manufacturing apparatus 11 of glass fiber, the heat generating member 14 and the bushing 13 are arrange|positioned separately. According to this configuration, for example, when heating both the bush 13 and the heat generating member 14, the temperatures of both can be controlled separately.

(1-5) The glass fiber manufacturing apparatus 11 further includes an insulating member 15 arranged between the heat generating member 14 and the bushing 13 . At this time, for example, the heat generating portion 14 a can be efficiently heated by improving the efficiency of energization to the heat generating member 14 . In addition, for example, by suppressing fusion of the heat generating member 14 and the bush 13 , replacement of the heat generating member 14 or the bush 13 can be facilitated.

(Second embodiment) About 2nd Embodiment of the manufacturing apparatus 11 of glass fiber, and the manufacturing method of glass fiber, it demonstrates centering on the point which differs from 1st Embodiment.

As shown in FIG. 4, the manufacturing apparatus 11 of the glass fiber of 2nd Embodiment is equipped with the 1st heat generating member 18 and the 2nd heat generating member 19, wherein the 2nd heat generating member 19 is arranged on the downstream side of the 1st heat generating member 18, and 1 The heat generating member 18 is separated. The 1st heat generating member 18 has the heat generating part 18a arrange|positioned in the flow path of the molten glass MG between the feeder 12 and the bushing 13, and the terminal 18b for electric conduction connected to the heat generating part 18a. Since the first heat generating member 18 has the same configuration as the heat generating member 14 of the first embodiment, description thereof will be omitted.

As shown in FIG. 5, the second heat generating member 19 has a heat generating portion 19a and a terminal 19b, wherein the heat generating portion 19a is arranged in the flow path of the molten glass MG between the feeder 12 and the bushing 13, and the terminal 19b is used to communicate with the heat generating portion 19b. Part 19a is connected to power. The heat generating part 19a of the 2nd heat generating member 19 is comprised from a plate material, and it is provided so that it may straddle the flow path of molten glass MG. The heat generating part 19a of the 2nd heat generating member 19 has at least 1 through-hole TH, and flows molten glass MG. In the present embodiment, the heat generating portion 19 a of the second heat generating member 19 has a plurality of through holes TH provided to form a plurality of flow portions having different aperture ratios.

The heat generating portion 19a of the second heat generating member 19 has two first flow portions B1, two second flow portions B2, and one third flow portion B3. Among these flow parts, the third flow part B3 is sandwiched between the two second flow parts B2, and the third flow part B3 and the two second flow parts B2 are sandwiched between the two first flow parts B1. between.

The first circulation portion B1 of the second heat generating member 19 is arranged on the downstream side of the first circulation portion A1 of the first heat generating member 18 . The second flow portion B2 of the second heat generating member 19 is arranged on the downstream side of the second flow portion A2 of the first heat generating member 18 . The third flow portion B3 of the second heat generating member 19 is arranged on the downstream side of the third flow portion A3 of the first heat generating member 18 .

The aperture ratio of the first flow portion B1 in the second heat generating member 19 is different from the aperture ratio of the first flow portion A1 in the first heat generating member 18 . The aperture ratio of the second flow portion B2 in the second heat generating member 19 is different from the aperture ratio of the second flow portion A2 in the first heat generating member 18 . The aperture ratio of the third flow portion B3 in the second heat generating member 19 is different from the aperture ratio of the third flow portion A3 in the first heat generating member 18 . Thus, the flow part of the 1st heat generating member 18 and the flow part of the 2nd heat generating member 19 are arrange|positioned so that opening ratio may differ from each other along the flow direction of molten glass MG.

Specifically, the aperture ratio of the first circulation portion B1 in the second heat generating member 19 is larger than the aperture ratio of the first circulation portion A1 in the first heat generating member 18 . The aperture ratio of the second flow portion B2 in the second heat generating member 19 is smaller than the aperture ratio of the second flow portion A2 in the first heat generating member 18 . The aperture ratio of the third flow portion B3 in the second heat generating member 19 is larger than the aperture ratio of the third flow portion A3 in the first heat generating member 18 .

In the second heat generating member 19, when the opening ratio of the first flow portion B1 is RB1 [%], the opening ratio of the second flow portion B2 is RB2 [%], and the opening ratio of the third flow portion B3 is RB3 [ %], it can satisfy the relationship of RB2<RB1<RB3. The opening ratio RB1 of the first flow portion B1 is, for example, within a range of more than 20% and not more than 60%. The aperture ratio RB2 of the second flow portion B2 is, for example, within a range of not less than 1% and not more than 20%. The opening ratio RB3 of the third passage portion B3 is, for example, within a range of more than 60% and not more than 90%.

The manufacturing apparatus 11 of glass fiber is equipped with the bushing block 16 arrange|positioned between the 1st heat generating member 18 and the 2nd heat generating member 19. As shown in FIG. The bushing block 16 electrically insulates between the first heat generating member 18 and the second heat generating member 19 . The insulating member 15 is disposed between the second heat generating member 19 and the bushing 13 .

Next, operations and effects of the second embodiment will be described.

(2-1) The heat-generating components in the manufacturing apparatus 11 of glass fibers include a first heat-generating component 18 and a second heat-generating component 19; 18 separation.

At this time, the temperature of molten glass MG can be further raised in the flow path between the feeder 12 and the bushing 13 by the heat generating portion 18 a of the first heat generating member 18 and the heat generating portion 19 a of the second heat generating member 19 . In this way, even when the temperature of molten glass MG flowing down from feeder 12 is very low, molten glass MG heated to a predetermined temperature can be supplied to bushing 13 . Therefore, molten glass MG can be stably flowed out from the nozzle N of the bushing 13 . Therefore, the glass filament GF can be stably formed.

(2-2) The heat generating part 18a of the first heat generating member 18 and the heat generating part 19a of the second heat generating member 19 in the glass fiber manufacturing apparatus 11 are formed of plate materials so as to straddle the flow path of the molten glass MG. set up. The heat generating part 18a of the 1st heat generating member 18 and the heat generating part 19a of the 2nd heat generating member 19 have a through-hole TH, and let molten-glass MG flow.

At this time, the contact area of the heat generation part 18a of the 1st heat generation member 18, and molten glass MG, and the contact area of the heat generation part 19a of the 2nd heat generation member 19, and molten glass MG can be enlarged. Therefore, for example, molten glass MG can be heated efficiently, or the uniformity of the temperature of molten glass MG can be improved.

(2-3) The first heat generating member 18 and the second heat generating member 19 each have a plurality of flow portions having different aperture ratios. The flow part of the 1st heat generating member 18 and the flow part of the 2nd heat generating member 19 are arrange|positioned so that opening ratio may differ from each other along the flow direction of molten-glass MG. In this case, the flow of molten glass MG can be further complicated. In this way, for example, the uniformity of the temperature of molten glass MG can be further improved.

(Modification example) This embodiment can also be modified and implemented in the following ways. The present embodiment and the following modified examples can be implemented in combination with each other within a range that does not contradict each other technically.

・The heat generating member 14 of the first embodiment may be changed to the heat generating member 20 shown in FIG. 6 . The heat generating member 20 shown in FIG. 6 includes a plate-shaped heat generating portion 20 a not having a through hole TH, and a terminal 20 b for conducting electricity connected to the heat generating portion 20 a. The area inside the two-dot chain line in FIG. 6 is the flow path FP of molten glass MG, and molten glass MG flows down so that it may surround the heating part 20a.

・At least one of the first heat generating member 18 and the second heat generating member 19 of the second embodiment may be changed to a heat generating member 20 as shown in FIG. 6 .

・The shape of the heat generating portion 20a of the heat generating member 20 shown in FIG. 6 may be changed to, for example, a columnar shape or a cylindrical shape.

・The heat generating part 14a of the heat generating member 14 of the first embodiment has a plurality of circulation parts with different aperture ratios, but the heat generating part 14a may be changed to a heat generating part having a constant aperture ratio. In the second embodiment, at least one of the heat generating portion 18a of the first heat generating member 18 and the heat generating portion 19a of the second heat generating member 19 may be changed to a heat generating portion having a constant aperture ratio.

- In the heat generating portion 14a of the heat generating member 14 according to the first embodiment, the number of flow portions having different aperture ratios may be two, or four or more.

・In the heat generating portion 18a of the first heat generating member 18 and the heat generating portion 19a of the second heat generating member 19 in the second embodiment, the number of circulation portions having different aperture ratios may be two or four or more.

- In the second embodiment, for example, the second heat generating member 19 may be changed to a heat generating member having the same configuration as the first heat generating member 18 . In addition, for example, the first heat generating member 18 may be changed to a heat generating member having the same configuration as the second heat generating member 19 . In detail, in 2nd Embodiment, the 1st heat generating member 18 and the 2nd heat generating member 19 may be changed into the heat generating member arrange|positioned so that the aperture ratio may be equal to each other along the flow direction of molten glass MG.

- The glass fiber manufacturing apparatus 11 of the second embodiment may further include a heat generating member between the first heat generating member 18 and the second heat generating member 19 or between the feeder 12 and the first heat generating member 18 . In detail, the number of heat generating members of the manufacturing apparatus 11 of glass fiber may be 3 or more.

- In the manufacturing apparatus 11 of the glass fiber of 1st Embodiment, you may arrange|position so that the heating member 14 may contact the bushing 13. In the glass fiber manufacturing apparatus 11 of the second embodiment, the second heat generating member 19 may be arranged in contact with the bushing 13 .

- In the glass fiber manufacturing apparatus 11 of each embodiment, the insulating member 15 may be omitted.

11: Glass fiber manufacturing equipment 12: Feeder 13: Bushing 14, 20: heating components 14a, 18a, 19a, 20a: heating part 15: Insulation member 18: The first heating component A1: 1st Circulation Department A2: The 2nd Circulation Department A3: The 3rd Circulation Department 19: The second heating component B1: 1st Circulation Department B2: 2nd Circulation Department B3: 3rd Circulation Department GF: glass wool MG: molten glass N: Nozzle TH: through hole

FIG. 1 is a cross-sectional view showing a glass fiber manufacturing apparatus in a first embodiment. Fig. 2 is a plan view showing a heat generating member. Fig. 3 is a plan view showing an insulating member. Fig. 4 is a cross-sectional view showing a glass fiber manufacturing apparatus in a second embodiment. Fig. 5 is a plan view showing a heat generating member. Fig. 6 is a plan view showing a heat generating member according to a modified example.

11: Manufacturing device

12: Feeder

13: Bushing

14: Heating component

14a: heating part

MG: molten glass

N: Nozzle

Claims (9)

A glass fiber manufacturing device comprising a feeder, a bushing, and a heating element, The above-mentioned feeder circulates the molten glass, The above-mentioned bushing is arranged below the above-mentioned feeder, and has a plurality of nozzles through which the above-mentioned molten glass flows out, The above-mentioned heat generating member generates heat by energizing, The said heat generating member has a heat generating part arrange|positioned in the flow path of the said molten glass between the said feeder and the said bushing. The manufacturing device of glass fiber as claimed in item 1, wherein The heat generating part of the heat generating member is formed of a plate material, and is provided across the flow path of the molten glass, The said heat generating part of the said heat generating member has a through-hole through which the said molten glass flows. The manufacturing device of glass fiber as claimed in item 2, wherein The heat generating portion of the heat generating member has a plurality of the through holes provided to form a plurality of flow portions having different aperture ratios. The glass fiber manufacturing device according to any one of claim 1 to claim 3, wherein The heat generating member includes a first heat generating member and a second heat generating member, The second heat generating member is arranged on the downstream side of the first heat generating member and is separated from the first heat generating member. The manufacturing device of glass fiber as claimed in item 1, wherein The heat generating member includes a first heat generating member and a second heat generating member, The second heat generating component is disposed on the downstream side of the first heat generating component and separated from the first heat generating component, The heat generating portion of the first heat generating member and the heat generating portion of the second heat generating member are formed of plate materials and are provided across the flow path of the molten glass, The said heat generating part of the said 1st heat generating member and the said heat generating part of the said 2nd heat generating member have a through-hole which allows the said molten glass to flow. The manufacturing device of glass fiber as claimed in item 5, wherein The first heat generating member and the second heat generating member each have a plurality of flow portions having different aperture ratios, The circulation portion of the first heat generating member and the circulation portion of the second heat generating member are arranged such that opening ratios differ from each other along a flow direction of the molten glass. The glass fiber manufacturing device according to any one of claim 1 to claim 3, claim 5, and claim 6, wherein The heat generating member and the bush are arranged separately. The glass fiber manufacturing device according to any one of claim 1 to claim 3, claim 5, and claim 6, wherein Furthermore, an insulating member disposed between the heat generating member and the bushing is provided. A method for producing glass fibers comprising a forming step of forming glass fibers using a glass fiber producing device, The manufacturing apparatus of the above-mentioned glass fiber comprises a feeder, a bushing, and a heat generating member, The above-mentioned feeder circulates the molten glass, The above-mentioned bushing is arranged below the above-mentioned feeder, and has a plurality of nozzles through which the above-mentioned molten glass flows out, The above-mentioned heat generating member generates heat by energizing, The heat generating member has a heat generating portion arranged in a flow path of the molten glass between the feeder and the bushing, In the above-mentioned forming step, the above-mentioned molten glass is heated by the above-mentioned heating member.

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