TW201318989A - Glass melting device, device for forming fiberglass, and method for forming fiberglass - Google Patents

Abstract

In the present invention, the clarification and homogenization of molten glass are performed effectively in the case of having performed high-temperature melting. In the present invention, the inside of a glass melting furnace (11), which is provided with a side wall (13) and a bottom wall (12) to which an electric heating member that performs resistive heating by means of electrification is formed, a molten glass outlet (15) being formed to the bottom wall (12), is provided with: an upper partition plate (16) that allows the passage of molten glass only from the furnace inner bottom of the glass melting furnace (11); and a thin-film-forming member (25) that is disposed between the upper partition plate (16) and the outlet (15), holds back the molten glass, forms a passage with the upper partition plate (16) through which molten glass flows from below to above, and to which a thin-film-forming surface (25b) is formed that allows the overflowing molten glass to drop downwards and thus be formed into a thin film.

Description

Glass melting device, glass fiber manufacturing device and glass fiber manufacturing method

The present invention relates to a glass melting apparatus for molten glass raw materials, a glass fiber producing apparatus for producing glass fibers using the glass melting apparatus, and a glass fiber producing method.

In recent years, in order to manufacture high-quality glass products, the demand for clarification of high-temperature molten glass raw materials has been increasing. As described above, as a technique for melting a glass raw material at a high temperature, those disclosed in Patent Documents 1 to 4 are well known.

Patent Document 1 describes that a glass crucible is heated at a high temperature by induction heating, and the glass raw material is melted at a high temperature, and the shell is cooled by a cooling tube to extend the life of the shell crucible. Further, Patent Document 1 discloses that the air bubbles contained in the molten glass are raised to the surface of the molten glass and ruptured by high-temperature purification, addition of a fine preparation, or the like.

Patent Document 2 describes that a shell crucible is heated by high-frequency energy of a coil mechanism to melt a glass raw material, and the molten glass is cooled by a cooling bridge station disposed at an upper portion of the shell crucible. Convection convection of molten glass in the shell melting. Further, Patent Document 2 discloses that the outlet of the molten glass is disposed above the coil mechanism to minimize the influence of the coil mechanism on the quality.

Patent Document 3 describes that a molten glass container is melted at a high temperature by using a tantalum melting vessel having a tubular outlet. Moreover, in Patent Document 3, it is described that the molten glass is solidified by cooling the lower portion of the melting container. The outlet forms a plug to clarify the molten glass in the melting vessel.

Patent Document 4 describes that a molten body is formed into a thin layer of 5 to 10 cm so as to flow in a horizontal flow path, and the bubble is raised to be ruptured on the surface of the molten body. Further, in Patent Document 4, it is described that the duct is immersed in the melt in a state of being inclined downward toward the downstream, and the bubble is separated from the melt and flows back in the duct.

[Patent Document 1] Japanese Patent Publication No. 2003-507311

[Patent Document 2] Japanese Patent Publication No. 2005-504707

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2005-119959

[Patent Document 4] Japanese Patent Publication No. 2001-518049

However, the techniques described in Patent Documents 1 to 4 have the following problems.

In the technique described in Patent Document 1, although the bubble is raised to the surface by refining, this is not achieved by the technique of defoaming, and it is only a high temperature and a refined preparation is added. It is not beyond the general clarification effect. Further, in the technique described in Patent Document 1, since the inside of the shell melting is a simple structure, the residence time of the molten glass of the shell melting is short, and the homogenization and clarification of the molten glass cannot be sufficiently performed. Moreover, in the technique described in Patent Document 1, since the shell melting is actively cooled by the cooling pipe, temperature change occurs in the shell melting furnace. The low part. Therefore, the loss of vitreousity (crystallization of the molten glass becomes opaque) occurs, and the risk of deterioration in quality is high, and the thermal efficiency is inferior.

In the technique described in Patent Document 2, the influence of the coil mechanism can be minimized. However, since the special operation for promoting defoaming is not performed, the clarification effect is not sufficient. Further, in the technique described in Patent Document 2, convection in the shell melting furnace is promoted. However, since the inside of the shell melting crucible has a simple structure, the residence time of the molten glass of the shell melting is short, and the molten glass is short. Homogenization and clarification cannot be fully carried out. Moreover, in the technique described in Patent Document 2, since the shell melting is actively cooled by the cooling bridge station, a portion where the temperature is lowered in the shell melting furnace is generated. Therefore, the loss of vitreousity is caused, the risk of deterioration in quality is high, and the thermal efficiency is poor.

According to the technique described in Patent Document 3, since the molten glass is isolated from the outside, the periphery of the bubble is surrounded by the molten glass. Therefore, even if the viscosity of the molten glass is low, the bubbles cannot be efficiently removed. Further, in the technique described in Patent Document 3, in order to secure the residence time in the molten container, the molten glass is temporarily closed in the molten container, and continuous melting cannot be performed, which is inefficient.

In the technique described in Patent Document 4, the technique of defoaming the molten body in a horizontal flow path is such that the thickness of the melt is 5 to 10 cm, so that the thickness of the melt is still thick. Therefore, it takes a lot of time until the bubbles reach the surface of the melt, and a sufficient defoaming effect cannot be obtained. Further, in the technique described in Patent Document 4, in the technique of immersing the catheter in the melt, the air bubbles in the duct are always surrounded by the molten glass. In the state, even if the viscosity of the melt is lowered, the bubbles cannot be efficiently removed. Further, in the technique described in Patent Document 4, since 1500 ° C is set to the highest temperature, the glass which is difficult to melt cannot be melted, and even if it can be melted, the melting time becomes long, so that it is in the molten glass. It takes a lot of time to homogenize and clarify.

Therefore, an object of the present invention is to provide a glass melting apparatus, a glass fiber manufacturing apparatus, and a glass fiber manufacturing method which can efficiently clarify and homogenize molten glass at a high temperature.

A glass melting apparatus according to the present invention is characterized by comprising: a glass melting furnace comprising: a bottom wall and a side wall formed by an electric heating member that is electrically heated by electric conduction; and a drawing outlet for drawing out the molten glass; and an input port; Arranged above the glass melting furnace for inputting the glass raw material; and a film forming member which is erected on the bottom wall between the input port and the pull-out port, and is formed with a film forming surface for blocking the energized bottom wall and the side wall The electric resistance heats the molten glass to be melted, and the overflowed molten glass is lowered and stretched to form a film.

In the glass-melting device of the present invention, the molten glass which is melted by the resistance heating of the bottom wall and the side wall is blocked by the film forming plate, and the molten glass overflowing from the film forming plate is formed by the film along the drawing outlet side. It is lowered, thinned to form a film, and then exported to a pull outlet. As described above, when the molten glass is thinned, the bubbles become unable to maintain their shape and are broken, so that a very excellent clarification effect can be obtained. Also, when the molten glass is In the case of thinning, since the heat transfer efficiency to the molten glass is increased, the melting of the unmelted material is promoted, and the molten glass can be homogenized.

Further, when the bottom wall and the side wall resistance are heated by energization, the glass raw material to be poured into the glass melting furnace can be heated and melted by heat conduction and radiation from the bottom wall and the side wall, so that the entire glass melting furnace The area can heat the molten glass. Therefore, in the case of heating, even if there is no molten glass in the glass melting furnace, the glass raw material can be heated and melted, and since the heating means is not provided in the vicinity of the drawing outlet, the drawing outlet itself is resistance-heated, so that self-control can be prevented. The temperature of the molten glass pulled out by the pull-out is lowered. Further, since not only the surfaces of the bottom wall and the side walls but also the entire bottom wall and the side walls are subjected to resistance heating, the heating efficiency of the glass raw material is high. Further, by partially changing the thickness of the bottom wall and the side wall, the ease of electrical flow can be changed, so that the temperature distribution of the glass melting furnace can be changed. Further, since it is not necessary to separately place the heating member in the molten glass, it is possible to prevent impurities from being mixed into the molten glass.

Further, the film forming member is formed in a plate shape, and is disposed between the lower side of the insertion opening in the vertical direction and the pull-out port, the lower end portion abuts against the bottom wall, and the side end portion abuts against the side wall, and the upper end portion is provided with the molten glass to pass through. The upper part passes through the section. As described above, when the film forming member is formed, since the film forming member is disposed between the lower side of the inlet opening in the vertical direction and the drawing outlet, the molten glass melted by the resistance heating of the bottom wall and the side wall is not directly led to the drawing outlet. It will be blocked by the film forming member. In addition, when the amount of the glass raw material is adjusted, and the liquid level of the molten glass in the glass melting furnace is adjusted to a position slightly higher than the upper passing portion, the molten glass overflowing from the film forming member may be The film formation surface of the film forming member is lowered, thereby being formed into a film shape. Thereby, the molten glass can be formed into a film shape.

In this case, it is preferable that the film forming member is inclined toward the inlet side. By tilting the plate-shaped film forming member, the molten glass that has passed through the upper passing portion is not separated from the film forming member and can be slid down on the film forming surface of the film forming member, so that the molten glass can be smoothly formed into a film. shape.

Further, the film forming member may be formed such that the lower end portion abuts against the bottom wall and is formed in a tubular shape surrounding the pull-out port. As described above, when the film forming member is constituted, the film forming member covers the drawing outlet, and a film forming plate is formed inside the film forming member. Then, the molten glass melted by the resistance heating of the bottom wall and the side wall is not directly discharged to the drawing outlet, but is blocked by the film forming member, and the amount of the glass raw material is adjusted to adjust the molten glass of the glass melting furnace. When the position is slightly higher than the upper end portion of the film forming member, the molten glass overflowing from the film forming member is lowered along the film forming surface of the film forming member, thereby forming a film shape. Thereby, the molten glass can be formed into a film shape.

In this case, it is preferable that the film forming member is formed in a shape in which the film forming surface is narrowed from the upper portion in the vertical direction toward the lower portion in the vertical direction. As described above, by forming the tubular film forming member, the molten glass overflowing from the film forming member can be slid down on the film forming surface of the film forming member without being separated from the film forming member, so that the molten glass can be smoothly formed into a film shape.

Further, the glass melting furnace is preferably composed of niobium or a niobium based alloy. Thus, by using a bismuth or bismuth-based alloy to form a glass melting furnace, it is possible to use cerium oxide. Since the high-temperature molten glass raw material having a melting point or higher is used, the melting time of the glass raw material can be greatly shortened. Further, since cerium is not generated from the molten glass even if it is in contact with the molten glass, the cerium particles in the molten glass are reduced, and the quality of the molten glass can be improved.

Further, it is preferable to further have an outer casing covering the glass melting furnace; and an inert gas supply means for supplying an inert gas to the outer casing. According to this configuration, since the entire glass melting furnace is in an inert gas atmosphere and is isolated from the atmosphere, it is possible to suppress the oxidation of the glass melting furnace and sublimation. Therefore, even if the molten glass is heated to a high temperature, the occurrence of a decrease in the durability of the glass melting device can be suppressed.

Further, it is preferable to have an upper partition plate disposed between the lower side of the inlet port and the film forming member and having the molten glass pass through the lower portion passing portion from the furnace bottom portion of the glass melting furnace. By disposing the upper partition plate in the glass melting furnace, it is possible to prevent the unmelted material from being pulled up from the drawing outlet by the rapid flow of the surface layer of the molten glass, and to extend the moving path of the molten glass in the glass melting furnace. . In this way, the retention time of the molten glass in the glass melting furnace is increased, the defoaming is promoted, the clarification effect of the molten glass is improved, and the melting of the unmelted material is promoted, and the molten glass can be equalized. Further, since a flow path for causing the molten glass to flow upward is formed between the upper partition plate and the film forming member, the bubbles contained in the molten glass can be pushed upward to be broken at the liquid surface of the molten glass. Thereby, the clarification effect of the molten glass can be further improved.

The glass fiber manufacturing apparatus of the present invention is characterized by comprising: the glass melting apparatus of any one of the above; disposed under the glass melting furnace; a storage tank into which the molten glass drawn from the pull-out port is introduced; and a fiberizing device that performs fiberization after the molten glass introduced into the storage tank is fiberized. According to the glass fiber manufacturing apparatus of the present invention, since the molten glass melted by the resistance heating of the bottom wall and the side wall is clarified, homogenized, and then fiberized by the film forming member, high-quality glass fiber can be produced. .

The glass fiber manufacturing method of the present invention is a method for producing a glass fiber using the glass fiber manufacturing apparatus described above, characterized in that the glass raw material is introduced into the glass melting furnace from the inlet, and the bottom wall and the side wall are energized. The bottom wall and the side wall are heated by electric resistance heating, and the glass raw material put into the glass melting furnace is melted, and after the molten glass is formed into a film shape by the film forming member, the molten glass is pulled out from the drawing outlet and then introduced into the storage tank, by the fiber. The chemical device fibrillates the molten glass that has been introduced into the storage tank to produce glass fibers. According to the method for producing a glass fiber of the present invention, since the molten glass melted by the resistance heating of the bottom wall and the side wall is clarified, homogenized, and then fiberized by the film forming member, high-quality glass fiber can be produced. .

In this case, the glass melting apparatus has an outer casing covering the glass melting furnace, and it is preferable to make the inside of the outer casing an inert gas atmosphere. In this way, by making the inside of the outer casing an inert gas atmosphere, the entire glass melting furnace can be isolated from the atmosphere, so that the glass melting furnace can be suppressed from being oxidized and sublimated. Therefore, even if the molten glass is heated to a high temperature, the occurrence of a decrease in the durability of the glass melting device can be suppressed.

Further, it is preferable to heat the molten glass to 1700 to 2000 ° C by resistance heating of the bottom wall and the side walls. So by heating the molten glass to 1700 Since the temperature is ~2000 ° C, it can be melted by the cerium oxide monomer which is a main component of glass, so that the melting time of the glass raw material can be greatly shortened.

According to the present invention, clarification and homogenization of the molten glass can be efficiently performed at a high temperature.

Hereinafter, a preferred embodiment of the glass melting apparatus, the glass fiber manufacturing apparatus, and the glass fiber manufacturing method of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals are given to the same or corresponding parts, and the repeated description is omitted.

[First Embodiment]

Fig. 1 is a schematic view showing a glass fiber manufacturing apparatus according to a first embodiment. As shown in FIG. 1, the glass fiber manufacturing apparatus 1 of the first embodiment includes a glass-melting device 10 placed on the susceptor 2, and a fiberizing device 30 disposed below the susceptor 2.

The glass melting apparatus 10 is provided with a glass melting furnace 11 which is a glass raw material such as a molten glass raw material powder or a glass block, and an outer casing 18 covering the glass melting furnace 11. The glass raw material powder is a glass raw material in which a powder of a metal oxide such as cerium oxide or aluminum oxide is mixed, and the glass block is a glass bead-shaped glass raw material in which the glass raw material powder is first melted and then cooled, and the glass bead-shaped glass is used. A glass frit-shaped glass material in which the raw material is pulverized. Furthermore, in In order to improve the homogeneity of the molten glass, it is preferred to use a glass frit-shaped glass material. The glass raw material is not particularly limited, but a glass raw material for use in the production of E glass, T glass, cerium oxide fiber or nitride glass can be preferably used.

The glass melting furnace 11 is disposed below the input port 19 into which the glass raw material is placed, and is formed in a box shape that opens upward, and includes a bottom wall 12 in which a pull-out port 15 for pulling out the molten glass is formed; The side wall 13 of the bottom wall 12. When the glass melting furnace 11 has the shape of the bottom wall 12 and the side wall 13, the upper angle of view is circular, the upper angle of view is polygonal, and the like.

The bottom wall 12 and the side wall 13 constituting the glass melting furnace 11 are composed of an electric heating member (conductor) that is electrically heated by electric conduction. In particular, the bottom wall 12 and the side wall 13 are preferably composed of a platinum group metal which is less reactive with molten glass and is less susceptible to corrosion by molten glass, and further has a high melting point of 2447 ° C and excellent mechanical strength (Ir). Or a bismuth based alloy is preferred. As the ruthenium-based alloy, it is preferable to contain 50% or more of ruthenium, and more preferably 60% or more of ruthenium. Further, the bottom wall 12 and the side wall 13 may be formed of a platinum group metal such as iridium (Ir) or a ruthenium-based alloy on the surface of a general furnace material such as brick.

A pair of electrode portions 13a are formed in the side wall 13, and a power source 14 for supplying a current is connected to each electrode portion 13a. Therefore, by supplying electric current to the glass melting furnace 11 from the power source 14 via the respective electrode portions 13a, the glass melting furnace 11 is electrically resistively heated, and can be melt-injected into the glass melting furnace by heat conduction and radiation from the glass melting furnace 11. 11 glass raw materials. Again Since the glass melting furnace 11 is subjected to resistance heating, the glass melting furnace 11 is preferably small. Further, the glass-melting device 10 is mainly used for a glass raw material glass bead melting method (MM method) of a molten glass lump, but may be used as a direct melting method (DM method) of a molten glass raw material powder.

Further, since the bottom wall 12 and the side wall 13 constituting the glass melting furnace 11 are constituted by electric heating members, the ease of electrical passage can be changed by changing the thickness depending on the location. Therefore, the temperature distribution in the glass melting furnace 11 can be adjusted by partially changing the thicknesses of the bottom wall 12 and the side walls 13. For example, when the glass raw material is settled to the bottom of the furnace of the glass melting furnace 11, the thickness of the path connecting the pair of electrode portions 13a through the vertical direction of the inlet port 19 is made thicker than the other portions, and can be efficiently melted. Glass raw materials. In addition, when the glass raw material floats in the vicinity of the liquid surface of the molten glass, the thickness of the path connecting the pair of electrode portions 13a through the vicinity of the liquid surface is made thicker than the other portions, whereby the glass raw material can be efficiently melted. In this case, each path is preferably the shortest distance.

Such a glass melting furnace 11 partitions the inner portion into a first region A and a second region B by the upper partition plate 16. The first region A is disposed below the vertical direction of the inlet port 19 to melt the region of the glass raw material that has been charged into the glass melting furnace 11. The second region B is a region where the clarification of the molten glass is performed, and the bottom wall 12 is formed with the pull-out port 15.

In the first region A of the glass melting furnace 11, a bubbler 24 is inserted. The bubbler 24 is a tubular member that ejects an inert gas into the molten glass in order to promote melting of the glass raw material. The discharge port of the bubbler 24 is disposed in the vicinity of the bottom of the first region A in the vertical direction of the input port 19 It is good nearby. The inert gas ejected from the bubbler 24 may be any inert gas. However, in order to prevent oxidation of the molten glass, a non-oxidizing gas is preferable, and at a low cost and stably At this point of supply, nitrogen is preferred. Further, the bubbler 24 may be inserted into the first region A of the glass melting furnace 11 from any position, but if the bubbler 24 is inserted from above the first region A of the glass melting furnace 11, The structure of the glass melting furnace 11 is simplified.

The upper partition plate 16 is formed in a flat plate shape so that the molten glass of the first region A passes only from the bottom of the furnace of the glass melting furnace 11 to the second region B.

Both end portions of the upper partition plate 16 abut against the side walls 13, and the side walls 13 are sealed. The upper end portion of the upper partition plate 16 is disposed at a position higher than the liquid surface of the molten glass to block the surface layer of the molten glass. Further, when the upper end portion of the glass melting furnace 11 can block the surface layer of the molten glass in the first region A, it can be disposed at any position, and for example, can extend to the upper surface of the glass melting furnace 11. At the lower end portion of the upper partition plate 16, a passage 16a through which the molten glass passes is passed from the vicinity of the bottom of the furnace of the glass melting furnace 11. Therefore, the molten glass melted in the first region A can be moved toward the second region B only by the passage opening 16a formed in the upper partition plate 16. When the passage 16a is allowed to pass through the molten glass, it may be of any shape or configuration. For example, the through port 16a may be formed by separating the lower end portion of the upper partition plate 16 from the bottom wall 12, and the through hole 16a may be formed by forming a through hole at the lower end portion of the upper partition plate 16. Furthermore, the passage 16a is at least at a height higher than the glass melting furnace 11 (deep Degree) The position below half is better.

The erecting direction of the upper partition plate 16 thus constituted may be a direction perpendicular to the horizontal direction, or may be a direction that is inclined toward the input port 19 from a direction perpendicular to the horizontal direction. Further, the upper partition plate 16 may be changed in the erecting direction on the way. For example, the lower portion of the molten glass may be immersed in the direction of the vertical direction of the molten glass in the direction perpendicular to the horizontal direction, so that it is not immersed in the molten state. The upper part of the glass is oriented perpendicular to the horizontal direction.

The upper partition plate 16 is formed of an electric heating member that is electrically heated by electric conduction in the same manner as the bottom wall 12 and the side wall 13 of the glass melting furnace 11. Further, the upper partition plate 16 is preferably made of a platinum group metal, and further preferably made of iridium (Ir) or a ruthenium based alloy. Further, the upper partition plate 16 may be formed of a platinum group metal such as iridium (Ir) or a ruthenium-based alloy on the surface of a general furnace material such as brick.

In the second region B of the glass melting furnace 11, a flat film-forming member 25 is disposed between the upper partition plate 16 and the pull-out port 15. The film forming member 25 blocks the molten glass which is melted in the first region A, and forms a flow path for the molten glass to flow upward from the lower portion between the partition plate 16 and the molten glass. The film forming surface 25b on the outlet 15 side is lowered, and is thereby led to the drawing outlet 15.

Fig. 2 is a cross-sectional perspective view showing the glass melting furnace shown in Fig. 1. As shown in FIGS. 1 and 2, the film forming member 25 is formed in a plate shape. Both end portions of the film forming member 25 abut against the side walls 13, and the side walls 13 are sealed. The lower end portion of the film forming member 25 abuts against the bottom wall 12 and is sealed from the bottom wall 12.

At the upper end portion of the film forming member 25, molten glass that has been melted in the first region A is formed to pass through the upper portion passing portion 25a. The upper passage portion 25a can be formed, for example, by the upper end surface of the film forming member 25, or can be formed by a through hole, a notch, or the like formed in the film forming member 25. The upper passage portion 25a is formed in a horizontal shape at a position slightly lower than the liquid surface of the molten glass in order to form the molten glass into a film having a uniform thickness.

On the side of the pull-out port 15 of the film forming member 25, a film forming surface 25b which is formed into a film shape by being lowered by the molten glass of the upper passing portion 25a is formed. The film forming surface 25b is formed in a planar shape in order to equalize the thickness of the molten glass which has been thinned. However, if the molten glass can be formed into a film shape, the film forming surface 25b can be formed into a curved shape that is curved in the vertical direction or the horizontal direction.

Further, in the first embodiment, the film forming member-like plate shape has been described as an example. However, if the molten glass that has overflowed can be separated from the film forming member without being separated from the film forming member, What shape is available. For example, as in the second embodiment to be described later, the film forming member may have a tubular shape. Further, in the case where the film forming member has a plate shape, it may be a curved curved surface or a stepped shape. When the film forming member is tubular, it may be in the form of a mortar or a segment.

The film forming member 25 is formed of an electric heating member that is resistance-heated by energization, similarly to the bottom wall 12 and the side wall 13 of the glass melting furnace 11. Further, the upper partition plate 16 is preferably composed of a platinum group metal, and it is preferably composed of iridium (Ir) or a ruthenium based alloy. Further, the film forming member 25 may be covered on the surface of a general furnace material such as brick. It is composed of a platinum group metal such as iridium (Ir) or a ruthenium-based alloy.

The erecting direction of the film forming member 25 configured as described above may be a direction perpendicular to the horizontal direction, or may be a direction that is inclined toward the input port 19 from a direction perpendicular to the horizontal direction. However, it is preferable that the molten glass that has passed through the upper passage portion 25a is formed into a film shape while sliding on the film forming surface 25b, and is inclined in a direction perpendicular to the horizontal direction toward the inlet port 19 side. In this case, the standing angle of the film forming member 25 is preferably 30 to 85° in the horizontal direction, more preferably 35 to 80°, and most preferably 40 to 70°. Further, the upper end surface of the upper passage portion 25a is preferably formed in a curved shape in which the film forming surface 25b side is chamfered so as to smoothly guide the molten glass passing through the upper passing portion 25a to the film forming surface 25b. Further, in order to increase the shortest distance of the flow path formed between the upper partition plate 16 and the film forming member 25, to increase the residence time of the molten glass of the flow path, the upper partition plate 16 and the film forming member 25 are formed. It is preferable to set it in parallel in the standing direction.

Further, the second region B of the glass melting furnace 11 thus constituted is heated by resistance heating of the bottom wall 12 and the side wall 13, but in this second region B, heating heating for heating the molten glass is provided. Heating means such as a device is preferred. Thereby, since the heating temperature of the molten glass can be finely adjusted in the second region B unlike the first region A, the amount of the molten glass drawn from the pull-out port 15 can be adjusted.

Further, in the bottom wall 12 of the first region A of the glass melting furnace 11, a discharge port 26 for melting the glass which is blocked by the film forming member 25 at the time of switching the type of glass to be melted is formed. When switching the type of glass, It is necessary to pull out all the molten glass from the inside of the glass melting furnace 11. At this time, the molten glass that has passed through the film forming member 25 can be pulled out from the drawing outlet 15, but the molten glass blocked by the film forming member 25 cannot be pulled from the glass melting furnace 11 without turning the glass melting furnace 11 upside down. Out. Therefore, when the type of the glass to be melted is switched, the molten glass blocked by the film forming member 25 can be pulled out by opening the discharge port 26 formed in the bottom wall 12 of the first region A.

This discharge port 26 can be switched by various methods. For example, the molten glass in the discharge port 26 can be hardened by air-cooling or water-cooling of the discharge port 26 to block the discharge port 26, and the hardened glass in the discharge port 26 can be heated by heating the discharge port 26 Melt to open the discharge port 26. Further, by forming the plug with the discharge port 26 by using the lid member, the discharge port 26 can be blocked, and the discharge port 26 can be opened by removing the plug from the discharge port 26.

As shown in FIG. 1, the outer casing 18 is placed on the susceptor 2, and is disposed above the top wall 18a of the top of the outer casing 18 in the vertical direction of the glass melting furnace 11, and the side wall 18b covering the periphery of the glass melting furnace 11, The bottom wall 18c disposed below the vertical direction of the glass melting furnace 11 is formed in a box shape.

In the top wall 18a, an input port 19 for introducing the glass raw material into the glass melting furnace 11 is formed above the vertical direction of the first region A of the glass melting furnace 11. Further, the screw inlet 20 for supplying the glass raw material to be supplied to the glass melting furnace 11 is connected to the inlet port 19.

An inert gas introduction port 21 for introducing an inert gas into the outer casing 18 is formed in the side wall 18b. Also, here, the inert gas introduction port 21, an inert gas supply device 22 that supplies an inert gas introduced into the outer casing 18 is connected. Further, the gas supplied from the inert gas supply device 22 may be any inert gas. However, in order to prevent oxidation of the molten glass, a non-oxidizing gas is preferable, and at a low cost. Nitrogen is preferred in that it can be stably supplied.

In the bottom wall 18c, a discharge port 23 for discharging the molten glass pulled out from the pull-out port 15 is formed below the vertical direction of the pull-out port 15 of the glass-melting furnace 11. Further, the discharge port 23 can discharge the inactive gas while discharging the molten glass.

If the outer casing 18 thus constructed can cover the entire glass melting furnace 11 and ensure airtightness, it can be used regardless of the shape and material. However, when considering mechanical properties, workability, price, heat resistance, and airtightness, Metal containers are preferred for sex.

In the outer casing 18, a heat insulating material such as a refractory tile that heat-insulates the glass melting furnace 11 and a heat-resistant plate is inserted. This heat insulating material is a material in which the innermost layer is not alloyed with niobium, and an alumina-based heat-resistant sheet and heat-resistant brick are suitably combined in the outer layer. Further, the heat insulating material is preferably disposed such that the surface temperature of the outermost layer is 300 ° C or less, and at least the surface temperature of the outermost layer is preferably 100 ° C or less.

Further, the susceptor 2 is formed with a molten glass for pulling the molten glass drawn from the drawing outlet 15 of the glass melting furnace 11 into the susceptor hole 3 of the fiberizing apparatus 30.

The fiberizing apparatus 30 is a device for fibrillating the molten glass drawn from the drawing outlet 15 of the glass melting furnace 11. This fiberizing equipment 30 series The furnace 31 is provided with a molten glass before being drawn from the pull-out outlet 15; a sleeve 32 of a plurality of filaments is formed from the molten glass in the front furnace 31; the filament is pulled out from the sleeve 32 and taken up at a high speed. The rotary drum 33; an applicator 37 that applies a sizing agent to each of the filaments drawn from the sleeve 32; and a bundle roller 34 that bundles the respective filaments.

The forehearth 31 is a storage tank into which the molten glass drawn from the pull-out port 15 is introduced, and the temperature of the molten glass is adjusted to adjust the viscosity of the molten glass. Further, the front furnace 31 is disposed below the vertical direction of the base hole 3, and is formed with a molten glass upper opening 35 for being introduced from the pull-out port 15. Further, the front furnace 31 is opened to the atmosphere by the upper opening 35. Further, the front furnace 31 is provided with heating means for adjusting the temperature of the molten glass. The heating means may be, for example, an electric heater 36 that is hung on the top surface of the front furnace 31, and is a heating means that can adjust the temperature of the molten glass, such as a gas burner 36, etc., regardless of the use. What kind of heating means are available.

The sleeve 32 is provided at the bottom of the front furnace 31, and a plurality of nozzles (not shown) for spinning (for example, about 100 to 4000) are formed. The sleeve 32 is provided with a heating means (not shown) for adjusting the temperature of the molten glass. This heating means is a resistance heating by energization. Therefore, the sleeve 32 is formed of an electric heating member that generates heat by energization, and is made of, for example, platinum, a platinum alloy, or the like.

Next, a method of manufacturing glass fibers by the glass fiber manufacturing apparatus 1 of the present embodiment will be described with reference to Fig. 3 . Fig. 3 is a cross-sectional view showing the flow of molten glass of a glass melting furnace. Furthermore, in Figure 3, For convenience of explanation, the bubbler 24 is omitted.

As shown in FIG. 1 to FIG. 3, first, after the inside of the casing 18 is vacuumed or decompressed by vacuum pumping, the oxygen present in the casing 18 is discharged, and the supply from the inert gas supply device 22 is not supplied. The active gas is introduced into the outer casing 18 from the inert gas introduction port 21, and the operation is repeated several times until the oxygen concentration in the outer casing 18 is at least 1% or less, and the inside of the outer casing 18 is made into an inert gas atmosphere. Further, before the introduction of the inert gas, the gas filled in the outer casing 18, the inert gas introduced into the outer casing 18, and the like are discharged from the discharge port 23.

Next, the glass raw material is supplied from the screw loader 20, and the glass raw material is supplied from the inlet port 19 to the first region A of the glass melting furnace 11, and a current is supplied from the power source 14 to energize the glass melting furnace 11. Then, the glass melting furnace 11 is electrically resistively heated so that the glass raw material introduced into the first region A is heated and melted. At this time, the molten glass is heated to 1700 to 2000 ° C by resistance heating of the glass melting furnace 11 by energization. Thereby, the melting of the cerium oxide contained in the glass raw material is promoted, the glass raw material is rapidly melted, and there is no unmelted portion of the glass raw material.

Further, the front furnace 31 and the sleeve 32 of the fiberizing apparatus 30 are also heated, and the heating temperature of the suitable front furnace 31 and the sleeve 32 is appropriately adjusted in advance, whereby the molten glass is easily formed in accordance with the glass composition of the glass fiber to be produced. The temperature of the fiber.

Then, the glass raw material charged into the glass melting furnace 11 is adjusted to raise the liquid level of the molten glass in the glass melting furnace 11 to be slightly higher than the upper portion passing portion 25a of the thin film forming member 25. At this time, it can also be located in the second area B. The heating means adjusts the viscosity of the molten glass, and adjusts the amount of the molten glass pulled out from the pull-out port 15, thereby increasing the liquid level of the molten glass in the glass melting furnace 11 to the upper portion passing portion 25a of the film forming member 25. Slightly higher.

Then, the molten glass which is melted in the first region A is moved from the first region A to the second region B only from the passage opening 16a formed in the upper partition plate 16 of the furnace bottom, and is formed in the upper partition plate 16 The flow path with the film forming member 25 rises to the liquid surface. At this time, the surface layer of the molten glass which is melted in the first region A is blocked by the upper partition plate 16, thereby preventing the rapid flow of the surface layer of the molten glass from the unmelted material and moving from the first region A to the first The situation of the second area B is generated. Further, since the upper partition plate 16 and the film forming member 25 are electrically heated by the energization from the power source 14, the molten glass flows in the flow path formed between the upper partition plate 16 and the film forming member 25. During this period, the melting of the unmelted material is also promoted. Further, the molten glass rises toward the liquid surface by the flow path, so that the bubbles contained in the molten glass are pushed to the liquid surface to be broken. Therefore, the flow path formed between the upper partition plate 16 and the film forming member 25 can function as a clarification portion of the molten glass.

Then, the molten glass that has overflowed from the film forming member 25 and reaches the liquid surface passes through the upper passage portion 25a of the film forming member 25, and slides along the film forming surface 25b of the film forming member 25 while forming a film shape. At this time, when the molten glass is thinned, since the bubbles do not maintain their shape, the bubbles contained in the molten glass are broken as they slide down along the film forming surface 25b. Therefore, the upper portion of the film forming member 25 passes The portion 25a and the film forming surface 25b function as a clarifying portion of the molten glass. In addition, since the molten glass is thinned by the film forming member 25, the heat transfer efficiency of the molten glass can be improved. Therefore, heating of the molten glass is promoted, and homogenization of the molten glass can be achieved.

In this way, the molten glass which is melted, clarified, and homogenized at a high temperature in the glass melting furnace 11 is pulled downward from the pull-out port 15 in the vertical direction. Further, the molten glass drawn from the pull-out port 15 is introduced into the discharge port 23 formed in the outer casing 18, the base hole 3 formed in the base 2, and the upper opening 35 formed in the front furnace 31 of the fiberizing apparatus 30, and introduced thereto. In the front furnace 31, a plurality of nozzles from the sleeve 32 provided at the bottom of the front furnace 31 are pulled out as glass filaments. Further, the glass filament drawn from the plurality of nozzles of the sleeve 32 is coated with a sizing agent by the applicator 37, and the plurality of glass filaments are bundled by the collecting roller 34, and the rotating drum 33 is rotated at a high speed. Winding, thereby producing a glass fiber in which bundles of elongated glass filaments are bundled.

As described above, according to the present embodiment, by arranging the film forming member 25 between the upper partition plate 16 and the pull-out port 15, the molten glass which is melted by the resistance heating of the bottom wall 12 and the side wall 13 is subjected to Since the thin film forming member 25 is blocked, the liquid level of the molten glass is slightly higher than the upper passing portion 25a, and the molten glass passing through the upper passing portion 25a is lowered along the thin film forming surface 25b of the thin film forming member 25, whereby The molten glass can be stretched to form a film. Thereby, the bubbles contained in the molten glass become unable to maintain their shape and are broken, so that a very excellent clarification effect can be obtained.

Moreover, the glass is melted by the resistance heating of the bottom wall 12 and the side wall 13 The inside of the melting furnace 11 is heated to an extremely high temperature, and the heat transfer efficiency to the molten glass is increased by the thinning of the molten glass. Therefore, the melting of the unmelted material can be greatly promoted, and the molten glass can be homogenized.

Further, by tilting the film forming member 25 toward the inlet port 19 side, the molten glass passing through the upper passage portion 25a is prevented from being separated from the film forming member 25 and can be slid on the film forming surface 25b, so that the molten glass can be smoothly formed. Film-like.

Further, when the bottom wall 12 and the side wall 13 are electrically resistively heated by energization, the glass material which has been introduced into the glass melting furnace 11 can be heated and melted by heat conduction and radiation from the bottom wall 12 and the side wall 13. Therefore, the molten glass is heated in the entire area of the glass melting furnace 11. Therefore, even when there is no molten glass in the glass melting furnace 11 in the case of heating, the glass raw material can be heated and melted, and since the pull-out port 15 is also electrically heated by itself, it is possible to prevent self-control even if no heating means is separately provided. The temperature of the molten glass pulled out by the pull-out port 15 is lowered. Further, since not only the entire surfaces of the bottom wall 12 and the side walls 13 but also the bottom wall 12 and the side walls 13 are electrically heated by electric resistance, the heating efficiency of the glass raw material is high. Moreover, by partially changing the thickness of the bottom wall 12 and the side wall 13, the ease of electrical flow can be changed, so that the temperature distribution of the glass melting furnace 11 can be changed. Further, since it is not necessary to separately place the heating member in the molten glass, it is possible to prevent the occurrence of impurities being mixed into the molten glass.

In addition, since the glass melting furnace 11 is made of ruthenium or ruthenium-based alloy, the glass raw material can be melted at a high temperature equal to or higher than the melting point of cerium oxide, so that the melting time of the glass raw material can be greatly shortened. Also, because of the 铱 even with molten glass The glass contact does not generate cerium oxide from the molten glass, so that the cerium particles in the molten glass are reduced, and the quality of the molten glass can be improved.

Further, by heating the electric resistance of the bottom wall 12 and the side wall 13, the molten glass is heated to 1,700 to 2,000 ° C, and the cerium oxide monomer which is a main component of the glass can be melted, so that the melting time of the glass raw material can be greatly shortened. .

Moreover, since the entire glass melting furnace 11 can be isolated from the atmosphere by making the inside of the casing 18 an inert gas atmosphere, it is possible to suppress the occurrence of oxidization and sublimation of the glass melting furnace 11. Therefore, even if the molten glass is heated to a high temperature, it is possible to suppress the occurrence of a decrease in the durability of the glass melting device 10.

Further, by disposing the upper partition plate 16 in the glass melting furnace 11, it is possible to prevent the unmelted material from being pulled up from the drawing outlet by the rapid flow of the surface layer of the molten glass, and to extend the molten glass in the glass melting furnace 11. The path of the move. In this way, the retention time of the molten glass in the glass melting furnace 11 is increased, so that defoaming is promoted, and the clarification effect of the molten glass is improved, and the melting of the glass raw material is promoted, and the molten glass can be homogenized. Further, since a flow path for allowing the molten glass to flow upward is formed between the upper partition plate 16 and the film forming member 25, the bubbles contained in the molten glass can be pushed upward to be broken at the liquid surface of the molten glass. Thereby, the clarification effect of the molten glass can be further improved.

[Second Embodiment]

Next, the second embodiment will be described. The second embodiment is basically the same as the first embodiment, and only the shape of the film forming member is different. . Therefore, in the following description, only portions that are different from the first embodiment will be described, and the description of the same portions as those of the first embodiment will be omitted.

Fig. 4 is a plan view showing a glass melting furnace of the glass fiber manufacturing apparatus of the second embodiment. Fig. 5 is a cross-sectional view taken along line V-V of the glass melting furnace shown in Fig. 4; As shown in FIG. 4 and FIG. 5, the glass melting furnace 70 of the glass fiber manufacturing apparatus of the second embodiment is provided with a film forming member 71 instead of the film forming member 25 of the first embodiment.

Similarly to the thin film forming member 25 of the first embodiment, the thin film forming member 71 blocks the molten glass that has been melted in the first region A, and the molten glass that has overflowed is formed into a film shape and then led out to the pull-out port 15 . The film forming member 71 is formed in a circular tubular shape surrounding the pull-out port 15, and is erected on the bottom wall 12 and abuts against the bottom wall 12.

At the upper end portion of the film forming member 71, molten glass that has been melted in the first region A is formed to pass through the upper portion passing portion 71a. The upper passage portion 71a can be formed, for example, by the upper end surface of the film forming member 71, or can be formed by a through hole formed in the film forming member 71, a notch, or the like. The upper passage portion 71a is formed in a horizontal shape at a position slightly lower than the liquid surface of the molten glass in order to form the molten glass into a film having a uniform thickness.

On the inner side of the film forming member 71 disposed on the side of the pull-out port 15, a film forming surface 71b formed in a film shape by descending and extending the molten glass passing through the upper passing portion 71a is formed. The cross-sectional surface of the film forming surface 71b is formed in a true circular shape. However, if the molten glass can be formed into a film shape, it may be formed into various shapes such as a round shape or a polygonal shape.

The film forming member 71 is made of a platinum group metal similarly to the bottom wall 12 and the side wall 13 of the glass melting furnace 11, and is preferably made of iridium (Ir) or a ruthenium based alloy. Further, the film forming member 71 may be formed of a platinum group metal such as iridium (Ir) or a ruthenium-based alloy on the surface of a general furnace material such as brick.

The film forming member 71 thus constituted may have the same horizontal cross-sectional shape from the upper end to the lower end, or may have different horizontal cross-sectional shapes. However, in the case where the upper end to the lower end have different horizontal cross-sectional shapes, the molten glass that has overflowed from the film forming member 71 is not separated from the film forming surface 71b and can slide down along the film forming surface 71b, and the film forming surface 71b It is preferable that the shape is narrowed and narrowed from the upper portion in the vertical direction toward the lower portion in the vertical direction. Specifically, the film forming surface 71b is preferably a mortar shape, a funnel shape, a tapered shape, or the like which is narrowed and narrowed from the upper portion in the vertical direction toward the lower portion in the vertical direction.

In addition, in order to smoothly guide the molten glass that has passed through the upper passage portion 71a to the film formation surface 71b, the upper end surface of the upper passage portion 71a is preferably formed into a curved shape in which the film formation surface 71b side is chamfered.

In the glass melting furnace 70 configured as described above, when the liquid level of the molten glass in the glass melting furnace 11 is slightly higher than the upper passage portion 71a of the thin film forming member 71, the molten glass melted in the first region A is only From the first region A to the second region B, the passage opening 16a formed in the upper partition plate 16 of the furnace bottom is blocked by the film forming member 71.

Then, the molten glass that has overflowed from the film forming member 71 passes through the upper passage portion 71a of the film forming member 71, and slides along the film forming surface 71b of the film forming member 71 while being formed into a film shape. At this time, when When the molten glass is thinned, the bubbles do not maintain their shape, so that the bubbles contained in the molten glass are broken as they slide down along the film forming surface 71b. Therefore, the upper passage portion 71a and the film formation surface 71b of the film forming member 71 can function as a clarification portion of the molten glass. In addition, since the thin film is formed by the thin film forming member 71 by the molten glass, the heat transfer efficiency of the molten glass is improved, so that the heating of the molten glass is promoted, and the molten glass can be homogenized. Further, the molten glass is pulled out from the pull-out port 15 in the vertical direction downward.

As described above, according to the present embodiment, the molten glass which is melted by the resistance heating of the bottom wall 12 and the side wall 13 is blocked by the film forming member 71 by the tubular film forming member 71 which surrounds the drawing outlet 15 . Therefore, by making the liquid level of the molten glass slightly higher than the upper passage portion 71a, the molten glass overflowing from the film forming member 71 is lowered along the film formation surface 71b, and the molten glass can be stretched to form a film. Thereby, the bubbles contained in the molten glass become unable to maintain their shape and are broken, so that a very excellent clarification effect can be obtained.

Furthermore, the present invention is not limited to the above embodiments, and various modifications can be made.

For example, the film forming member 25 may have various shapes and structures as long as it can be cut into a film shape by blocking the molten glass, and may have a shape as shown in FIGS. 6 and 7 . Fig. 6 is a view showing another example of a plate-shaped film forming member, wherein (a) and (b) are cross-sectional views of the glass melting furnace, and (c) and (d) are plan views of the glass melting furnace. Fig. 7 is a view showing another example of a tubular film-forming member, (a) is a sectional view of a glass melting furnace, and (b) ~ ( d) is a plan view of a glass melting furnace. In addition, in FIGS. 6 and 7, the components other than the film forming member are omitted to illustrate the glass melting furnace.

The plate-shaped film forming member 25A shown in Fig. 6(a) is formed in a curved shape curved in an arc shape in the horizontal direction. The plate-shaped film forming member 25B shown in Fig. 6(b) is formed in a curved shape that is curved in a wave shape in the horizontal direction. The plate-shaped film forming member 25C shown in Fig. 6(c) is formed in a curved shape curved in an arc shape in the vertical direction. The film forming member 25D shown in Fig. 6(d) is formed into a curved shape that is curved in a wave shape (stepped shape) in the vertical direction.

Further, as shown in FIGS. 6(a) and 6(b), by bending the film forming member in the horizontal direction, the flow rate of the molten glass can be increased, so that the amount of molten glass produced can be increased. Further, as shown in Figs. 6(c) and (d), by bending the film forming member in the vertical direction, the residence time of the molten glass can be increased on the film forming surface of the film forming member, whereby the molten glass can be lifted. Clarification effect.

The tubular film forming member 71A shown in Fig. 7(a) is formed in a rectangular ring shape, and the inner diameter of the pull-out port is different from the inner diameter of the film forming member. The tubular film forming member 71B shown in Fig. 7(b) is formed into a tapered shape in which the film forming surface is narrowed and narrowed from the upper portion in the vertical direction toward the lower portion in the vertical direction. The tubular film forming member 71C shown in Fig. 7(c) is formed in a mortar shape or a funnel shape in which the film forming surface is curved and narrowed from the upper portion in the vertical direction toward the lower portion in the vertical direction. The tubular film forming member 71D shown in Fig. 7(d) is formed in a two-stage mortar shape in which the film forming surface is gradually narrowed and narrowed from the upper portion in the vertical direction toward the lower portion in the vertical direction.

Moreover, as shown in FIG. 7(a), the film forming member can be easily manufactured by forming the film forming member into a rectangular ring shape. Further, as shown in Fig. 7(a), since the inner diameter of the pull-out port is different from the inner diameter of the film-forming member, it is not necessary to accurately match the pull-out port and the film-forming member, so that glass melting can be easily manufactured. furnace. Further, as shown in FIGS. 7(b) to 7(d), by narrowing the film forming member downward in the vertical direction, the molten glass overflowing from the film forming member is not separated from the film forming member and can be slid down on the film forming member. Since the film formation surface is formed, the molten glass can be smoothly formed into a film shape. Moreover, as shown in FIG. 7(b), the film forming member can be easily manufactured by linearly narrowing the film forming member. Further, as shown in FIG. 7(c), by narrowing the film forming member in a curved manner, the residence time of the molten glass can be increased on the film forming surface of the film forming member, whereby the clarification effect of the molten glass can be enhanced. Further, as shown in Fig. 7(d), by gradually narrowing the film forming member, the residence time of the molten glass on the film forming surface of the film forming member can be further increased.

Further, in the above embodiment, the case where the glass melting furnace 11 is covered by the outer casing 18 has been described as an example. However, in the case where the glass melting furnace 11 or the like is allowed to be oxidized, it is not necessary to expose the glass melting furnace 11 to the inert gas. In the case of the environment, it is not always necessary to cover the glass melting furnace 11 with the outer casing 18.

Further, in the above-described embodiment, the molten glass pulled out from the pull-out port 15 is directly introduced into the front furnace 31. However, the glass fiber manufacturing apparatus 60 shown in Fig. 8 is similar to the self-drawing outlet 15 The drawn molten glass passes through the intermediate tank of the molten glass storage tank 61 and the vacuum degassing furnace 62 It is introduced again into the front furnace 31. Further, the vacuum degassing furnace 62 is configured to hermetically cover the furnace 63 into which the molten glass is introduced by the outer casing 64, and to decompress the inside of the outer casing 64 by the pressure reducing pump 65, thereby facilitating introduction into the furnace 63. Defoamer of molten glass.

In the above-described embodiment, the glass-melting device 10 is applied to the glass fiber-making device 1 as an example. However, the glass-melting device 10 can be applied to a product manufacturing device such as a glass chip manufacturing device.

Further, in the above embodiment, the case where the pull-out port 15 is formed in the bottom wall 12 has been described as an example. However, the pull-out port 15 is located at a lower level than the level of the molten glass which passes through the upper portion passing portion 25a of the film forming member 71. The vertical position is formed at any position. For example, a joint portion between the bottom wall 12 and the side wall 13 (an angular portion formed by the bottom wall 12 and the side wall 13), a lower portion of the side wall 13 (near the joint portion between the bottom wall 12 and the side wall 13), and the like may be formed.

[Industry use possibility]

In the present invention, a glass melting apparatus which is a raw material of molten glass, a glass fiber manufacturing apparatus for producing glass fibers using the glass melting apparatus, and a glass fiber manufacturing method can be used.

1‧‧‧Fiberglass manufacturing equipment

2‧‧‧Base

3‧‧‧Base hole

10‧‧‧ glass melting device

11‧‧‧ glass melting furnace

12‧‧‧ bottom wall

13‧‧‧ side wall

13a‧‧‧Electrode

14‧‧‧Power supply

15‧‧‧ Pulling out

16‧‧‧ Upper partition

16a‧‧‧pass (lower pass)

18‧‧‧Shell

18a‧‧‧ top wall

18b‧‧‧ side wall

18c‧‧‧ bottom wall

19‧‧‧ Input

20‧‧‧Spiral loader

21‧‧‧Inactive gas inlet

22‧‧‧Inactive gas supply device

23‧‧‧Export

24‧‧‧ bubbler

25(25A~25D)‧‧‧ Film forming member

25a‧‧‧Upper Passage

25b‧‧‧film forming surface

29‧‧‧Export

30‧‧‧Fiberification equipment

31‧‧‧ front furnace

32‧‧‧Sleeve (fibration unit)

33‧‧‧Rotating drum (fibration unit)

34‧‧‧Bundle rollers (fibration unit)

35‧‧‧ upper opening

36‧‧‧Electrical heater

37‧‧‧Applicator (fibration unit)

60‧‧‧Fiberglass manufacturing equipment

61‧‧‧Solid glass storage tank

62‧‧‧Decompression defoaming furnace

63‧‧‧ furnace

64‧‧‧Shell

65‧‧‧Relief pump

70‧‧‧ glass melting furnace

71(71A~71D)‧‧‧ Film forming member

71a‧‧‧Upper Passage

71b‧‧‧film forming surface

A‧‧‧First area

B‧‧‧Second area

Fig. 1 is a schematic view showing a glass fiber manufacturing apparatus according to a first embodiment.

Fig. 2 is a cross-sectional perspective view showing the glass melting furnace shown in Fig. 1.

Fig. 3 is a cross-sectional view showing the flow direction of the molten glass of the glass melting furnace.

Fig. 4 is a plan view showing a glass melting furnace of the glass fiber manufacturing apparatus of the second embodiment.

Fig. 5 is a cross-sectional view taken along line V-V of the glass melting furnace shown in Fig. 4;

Fig. 6 is a view showing another example of a plate-shaped film forming member.

Fig. 7 is a view showing another example of a tubular film forming member.

Fig. 8 is a schematic view showing a glass fiber manufacturing apparatus equipped with a vacuum degassing furnace.

1‧‧‧Fiberglass manufacturing equipment

2‧‧‧Base

3‧‧‧Base hole

10‧‧‧ glass melting device

11‧‧‧ glass melting furnace

12‧‧‧ bottom wall

13‧‧‧ side wall

13a‧‧‧Electrode

14‧‧‧Power supply

15‧‧‧ Pulling out

16‧‧‧ Upper partition

16a‧‧‧pass (lower pass)

18‧‧‧Shell

18a‧‧‧ top wall

18b‧‧‧ side wall

18c‧‧‧ bottom wall

19‧‧‧ Input

20‧‧‧Spiral loader

21‧‧‧Inactive gas inlet

22‧‧‧Inactive gas supply device

23‧‧‧Export

24‧‧‧ bubbler

25(25A~25D)‧‧‧ Film forming member

25a‧‧‧Upper Passage

25b‧‧‧film forming surface

29‧‧‧Export

30‧‧‧Fiberification equipment

31‧‧‧ front furnace

32‧‧‧Sleeve (fibration unit)

33‧‧‧Rotating drum (fibration unit)

34‧‧‧Bundle rollers (fibration unit)

35‧‧‧ upper opening

36‧‧‧Electrical heater

37‧‧‧Applicator (fibration unit)

A‧‧‧First area

B‧‧‧Second area

Claims (12)

A glass melting apparatus characterized by comprising: a glass melting furnace comprising a bottom wall and a side wall formed by an electric heating member that is electrically heated by electric conduction, and a drawing outlet for drawing out the molten glass; and an insertion port, the arrangement thereof a glass raw material is placed above the glass melting furnace; and a film forming member is erected on the bottom wall between the input port and the pull-out port, and a film forming surface is formed to block the energization. The melting of the molten glass by the resistance of the bottom wall and the side wall causes the molten glass to be dropped and stretched to form a film. The glass-melting device according to the first aspect of the invention, wherein the film forming member is formed in a plate shape, disposed between a lower side of the insertion port in a vertical direction and the pull-out port, and a lower end portion abuts against the bottom wall, and The side end portion abuts against the side wall, and the upper end portion is provided with a portion through which the molten glass passes. The glass-melting device according to claim 2, wherein the film forming member is inclined toward the input port side. The glass-melting device according to claim 1, wherein the lower end portion of the film forming member abuts against the bottom wall and is formed in a tubular shape surrounding the drawing outlet. The glass-melting device according to the fourth aspect of the invention, wherein the film forming member has a shape in which the film forming surface is narrowed and narrowed from an upper portion in a vertical direction toward a lower portion in a vertical direction. The glass melting apparatus according to any one of claims 1 to 5, wherein the glass melting furnace is made of tantalum or a niobium based alloy. The glass melting device according to any one of claims 1 to 6, wherein the glass melting device further comprises: an outer casing covering the glass melting furnace; and an inert gas supply means for supplying an inert gas into the outer casing . The glass-melting device according to any one of claims 1 to 7, wherein the glass-melting device further comprises an upper partition plate, wherein the upper partition plate is disposed below the vertical direction of the input port to form the film Between the members, the molten glass is passed through the lower portion passing portion from the bottom of the furnace of the glass melting furnace. A glass fiber manufacturing apparatus, comprising: the glass melting apparatus according to any one of claims 1 to 8; a storage tank disposed under the glass melting furnace for pulling out from the pull outlet The molten glass is introduced; and the fiberizing device is obtained by fibrillating the molten glass introduced into the storage tank and then spinning. A method for producing a glass fiber, which is a method for producing a glass fiber using a glass fiber manufacturing device according to claim 9 of the patent application, characterized in that In order to introduce the glass raw material into the glass melting furnace from the input port, the bottom wall and the side wall are electrically connected to each other, and the bottom wall and the side wall are electrically heated to be charged into the glass melting furnace. The glass raw material is melted, and after the molten glass is formed into a film shape by the film forming member, the molten glass is drawn out from the drawing outlet and introduced into the storage tank, and the fiberizing device is introduced into the storage tank to be melted. The glass is fiberized to produce glass fibers. The glass fiber manufacturing method according to claim 10, wherein the glass melting device has an outer casing covering the glass melting furnace, and the inside of the outer casing is made into an inert gas atmosphere. The method for producing a glass fiber according to claim 10, wherein the molten glass is heated to 1700 to 2000 ° C by resistance heating of the bottom wall and the side wall.