WO2023042610A1

WO2023042610A1 - Glass article manufacturing device and glass article manufacturing method

Info

Publication number: WO2023042610A1
Application number: PCT/JP2022/031513
Authority: WO
Inventors: 周作玉村
Original assignee: 日本電気硝子株式会社
Priority date: 2021-09-15
Filing date: 2022-08-22
Publication date: 2023-03-23
Also published as: JP2023043010A; TW202313494A

Abstract

A glass article manufacturing device 1 equipped with transfer pipes P1-P4 that transfer a molten glass Gm, wherein the transfer pipes P1-P4 have a tubular section 14 through which the molten glass Gm flows, and electrodes 15a and 16a attached on the outer circumferential side of the tubular section 14 and supplying an electric current to the tubular section 14. Further, the tubular section 14 has a seam 14a that extends along the direction of the pipe axis Z. The positions of the electrodes 15a and 16a and the position of the seam 14a are made different in the circumferential direction of the tubular part 14.

Description

Glass article manufacturing apparatus and glass article manufacturing method

The present invention relates to a glass article manufacturing apparatus equipped with a transfer pipe for transferring molten glass and a glass article manufacturing method.

As is well known, when manufacturing glass articles such as glass plates and glass tubes, molten glass is transferred from a melting furnace to a molding device. A plurality of transfer pipes are arranged in the middle of the route for transferring the molten glass.

　The main transfer pipes include those that constitute the clarification tank, the stirring tank, the cooling pipe, etc. in order from the upstream side of the transfer route. In addition, there are also transfer pipes that constitute an upstream connecting pipe that connects the melting furnace and the clarification tank, a midstream connection pipe that connects the clarification tank and the agitating tank, and the like.

Patent Document 1 discloses that both circumferential ends of a transfer pipe (a transfer pipe that constitutes a stirring vessel in the same document) in which molten glass flows are joined by welding. Therefore, the tubular portion of the document is provided with a joint portion (joint portion) extending in the pipe axis direction. In addition, in the document, a reinforcing member is provided to cover the joint portion of the tubular portion from the outer peripheral side.

Patent Literature 2 discloses a configuration in which an electrode section for applying an electric current to the tubular section is attached to the outer peripheral side of the tubular section of the transfer pipe. In the literature, the electrode section is integrally attached to the outer peripheral side of the flange section provided at the axial end of the tubular section.

JP 2014-47102 A Japanese Patent Application Laid-Open No. 2020-203810

The inventor of the present invention has tried various ideas to attach the electrode portion disclosed in Patent Document 2 to the tubular portion having the seam portion disclosed in Patent Document 1. As a result, the inventors found that it is necessary to properly position the joint portion and the electrode portion in order to attach the electrode portion to such a tubular portion without any trouble. In other words, the inventors have found that if the positional relationship between the joint and the electrode is inappropriate, the joint is severely damaged.

Therefore, an object of the present invention is to reduce damage to the joint portion by optimizing the positional relationship between the joint portion provided in the tubular portion of the transfer tube and the electrode portion.

A first aspect of the present invention, which has been devised to solve the above problems, is an apparatus for manufacturing a glass article comprising a transfer pipe for transferring molten glass, wherein the transfer pipe is a tubular portion through which molten glass flows. and an electrode section that is attached to the outer peripheral side of the tubular section and applies an electric current to the tubular section, the tubular section has a joint section that extends along the tube axis direction, and the position of the joint section and the The positions of the electrode portions are different in the circumferential direction of the tubular portion.

According to such a configuration, since the position of the joint provided in the tubular portion of the transfer tube and the position of the electrode portion differ in the circumferential direction of the tubular portion, the tubular portion and thus the transfer pipe are effectively prevented from being damaged. Suppressed. More specifically, since the joint portion of the tubular portion is joined by welding or the like, it is generally low in strength and easily damaged. In addition, at the attachment position of the electrode part in the tubular part, the electric current density increases and the temperature tends to be high, so that it is easily damaged. Therefore, if the positions of the two are overlapped in the circumferential direction of the tubular portion, damage to the tubular portion and thus to the transfer pipe becomes significant. In the present invention, since the positions of the two are different in the circumferential direction, such problems do not occur, and the durability of the tubular portion and thus the transfer tube can be improved.

In this configuration, the electrode portion may be attached to a flange portion provided on the tubular portion.

By doing so, the flange portion provided on the tubular portion is effectively used as the mounting seat portion for the electrode portion.

In the above configuration, the tubular portion may be arranged such that the pipe axis direction is along the horizontal direction or the inclined direction, and the joint portion may be provided at a position other than the top portion in the circumferential direction of the tubular portion.

Here, for example, if the interior of the tubular portion is filled with molten glass, the molten glass can reach the highest temperature around the top portion of the tubular portion (the top portion in the circumferential direction), so the top portion of the tubular portion is likely to be damaged. . Moreover, air pockets are likely to occur in the molten glass around the top of the tubular portion, which may cause problems such as oxidization of the top of the tubular portion and thinning of the wall. In addition, if the molten glass does not come into contact with the periphery of the top of the tubular portion due to the occurrence of air pockets or the molten glass not being filled, the top of the tubular portion itself becomes even hotter and more likely to be damaged. For these reasons, when a seam is provided at the top of the tubular portion, the seam is likely to be damaged. According to the configuration here, since the joint portion is provided at a position other than the top portion of the tubular portion, such a problem does not occur.

Further, the tubular portion may be arranged such that the pipe axis direction is along the horizontal direction or the inclined direction, and the joint portion may be provided at a position other than the bottom portion in the circumferential direction of the tubular portion.

Here, since the bottom of the tubular portion (the bottom in the circumferential direction) is the portion where the influence (load) of the weight of the molten glass is the greatest, damage is likely to occur. Therefore, when a seam is provided at the bottom of the tubular portion, the risk of damage to the seam becomes significant. According to the configuration here, since the joint portion is provided at a position other than the bottom portion of the tubular portion, such a problem does not occur.

In the above configuration, the transfer pipe may constitute a clarification tank.

In this way, the fining tank through which the high-temperature molten glass flows is easily damaged, so the effect of improving the durability of the transfer pipe according to the present invention becomes remarkable.

In the above configuration, it may constitute an upstream connecting pipe that connects the melting furnace and the clarification tank.

By doing so, the upstream connecting pipe through which high-pressure molten glass flows is easily damaged, so the effect of improving the durability of the transfer pipe according to the present invention becomes remarkable.

A second aspect of the present invention, which has been devised to solve the above problems, is a method for manufacturing a glass article, comprising a step of transferring molten glass using a transfer pipe provided in the above-described manufacturing apparatus. Characterized.

According to this method, it is possible to enjoy substantially the same effects as the glass article manufacturing apparatus according to the present invention already described.

According to the present invention, the positional relationship between the joint portion provided in the tubular portion of the transfer tube and the electrode portion becomes appropriate. As a result, damage to the tubular portion is effectively suppressed, and the durability of the transfer pipe is improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic side view which shows the whole structure of the manufacturing apparatus of the glass article which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first example of a transfer tube, which is a component of a glass article manufacturing apparatus according to an embodiment of the present invention; FIG. 3 is a vertical cross-sectional side view of the transfer tube according to the first example cut along line AA of FIG. 2; FIG. 3 is a longitudinal front view of the transfer tube according to the first example cut along line BB of FIG. 2; FIG. 4 is a perspective view showing a second example of a transfer tube, which is a component of the apparatus for manufacturing glass articles according to the embodiment of the present invention. FIG. 6 is a longitudinal front view of the transfer pipe according to the second example cut along line CC of FIG. 5; Fig. 10 is a perspective view showing a third example of a transfer pipe, which is a component of the apparatus for manufacturing glass articles according to the embodiment of the present invention; FIG. 8 is a vertical cross-sectional front view of the transfer tube according to the third example cut along line DD of FIG. 7; FIG. 11 is a perspective view showing a fourth example of a transfer pipe, which is a component of the apparatus for manufacturing glass articles according to the embodiment of the present invention. FIG. 10 is a vertical cross-sectional front view of the transfer tube according to the fourth example cut along line EE in FIG. 9;

Hereinafter, a glass article manufacturing apparatus and a manufacturing method thereof according to embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 illustrates an apparatus for manufacturing glass articles according to the present invention. As shown in the figure, this manufacturing apparatus 1 can be roughly divided into a melting furnace 2 arranged at the upstream end for heating frit to produce molten glass Gm, and a melting furnace 2 for producing molten glass Gm flowing out from the melting furnace 2. A transfer device 3 for transferring toward the downstream side and a forming device 4 for forming a glass ribbon Gr using the molten glass Gm supplied from the transfer device 3 are provided.

The transfer device 3 includes, in order from the upstream side, a clarification tank 5, a stirring tank 6, and a conditioning tank 7. An inflow portion 5 a of the clarification tank 5 communicates with an outflow portion 2 b of the melting furnace 2 via an upstream connection pipe 8 . The outflow portion 5b of the clarification tank 5 communicates with the inflow portion 6a of the agitating tank 6 via a midstream connecting pipe 9 . The outflow part 6b of the stirring tank 6 communicates with the inflow part 7a of the conditioning tank 7 via the cooling pipe 10 .

The fining tank 5 is for fining the molten glass Gm produced in the melting furnace 2 . The stirring tank 6 stirs the molten glass Gm that has been subjected to the refining treatment to homogenize it. The cooling pipe 10 cools the homogenized molten glass Gm to adjust its viscosity and the like. The conditioning tank 7 is for further adjusting the viscosity and flow rate of the cooled molten glass Gm. A plurality of stirring tanks 6 may be arranged on the transfer route of the transfer device 3 .

The molding device 4 has a molded body 11 that flows down the molten glass Gm by an overflow downdraw method and molds it into a belt shape, and a large-diameter introduction pipe 12 that guides the molten glass Gm to the molded body 11 . Molten glass Gm is supplied to the introduction pipe 12 from the conditioning tank 7 of the transfer device 3 through a small-diameter pipe 13 .

The strip-shaped glass ribbon Gr is supplied to the slow cooling process and the cutting process, and sheet glass having a desired size is cut out as a glass article. The plate glass obtained here has a thickness of, for example, 0.01 to 2 mm, and is used for glass substrates and cover glasses of displays such as liquid crystal displays and organic EL displays. In addition, the forming apparatus 4 may perform another down-draw method such as the slot down-draw method, or may perform a method other than the down-draw method, such as the float method.

As the glass of the plate glass, silicate glass and silica glass are used, preferably borosilicate glass, soda lime glass, aluminosilicate glass, and chemically strengthened glass are used, and alkali-free glass is most preferably used. Here, the alkali-free glass is a glass that does not substantially contain an alkali component (alkali metal oxide), and specifically, a glass in which the weight ratio of the alkali component is 3000 ppm or less. be. The weight ratio of the alkali component in the present invention is preferably 1000 ppm or less, more preferably 500 ppm or less, and most preferably 300 ppm or less.

The clarification tank 5, the stirring tank 6, the conditioning tank 7, the upstream connection pipe 8, the midstream connection pipe 9 and the cooling pipe 10 of the transfer device 3 are all constituted by transfer pipes. The clarification tank 5, the stirring tank 6, the conditioning tank 7, the upstream connection pipe 8, the midstream connection pipe 9, and the cooling pipe 10 may each be configured by connecting a plurality of transfer pipes. These transfer tubes are described in detail below.

2 to 4 illustrate the transfer pipe P1 (hereinafter referred to as the first transfer pipe P1) according to the first example. In this embodiment, the first transfer pipe P<b>1 constitutes the clarification tank 5 and the midstream connection pipe 9 . 2 is a perspective view showing the first transfer pipe P1, FIG. 3 is a longitudinal front view cut along line AA in FIG. 2, and FIG. 4 is a cut along line BB in FIG. It is a longitudinal side view. As shown in these figures, the first transfer pipe P1 includes a tubular portion 14 into which molten glass flows, and

flange portions

15 and 16 provided at one end and the other end of the tubular portion 14 in the tube axis Z direction. , and

electrode portions

15a and 16a attached to the outer peripheral portions of these

flange portions

15 and 16, respectively. A pipe axis Z of the first transfer pipe P1 extends in the horizontal direction.

The tubular portion 14, the

flange portions

15 and 16, and the

electrode portions

15a and 16a may all be made of platinum or a platinum alloy (such as a platinum rhodium alloy), or may be made of platinum or a platinum alloy with zirconia or the like dispersed therein. It may also be made of hardened platinum or a hardened platinum alloy. The

flange portions

15, 16 and the

electrode portions

15a, 16a may be made of nickel or a nickel alloy. In the following description, the flange portion 15 and the electrode portion 15a on the upstream side (the left side in FIGS. 2 and 3) are referred to as the upstream flange portion 15 and the upstream electrode portion 15a, respectively, and the downstream side (the left side in FIGS. 2 and 3). The right flange portion 16 and the electrode portion 16a are referred to as the downstream flange portion 16 and the downstream electrode portion 16a, respectively.

The tubular portion 14 of the first transfer pipe P1 is provided with a seam portion 14a extending linearly along the pipe axis Z direction. The seam portion 14a is a joint portion in which both end portions of a pipe material curved in a circular shape (perfect circle) are joined by welding or the like. The seam portion 14a is provided at an intermediate position between the top portion and the bottom portion of the tubular portion 14. As shown in FIG. In this embodiment, the seam portion 14a is provided at the center position in the circumferential direction from the top portion to the bottom portion of the tubular portion 14 .

The upstream flange portion 15 and the downstream flange portion 16 are fixed by welding to one end and the other end of the tubular portion 14 in the tube axis Z direction. The upstream electrode portion 15a is integrally attached to the lower portion of the upstream flange portion 15 so as to protrude downward. In the illustrated example, the upstream electrode portion 15a is integrally attached to the bottom portion of the upstream flange portion 15 so as to protrude vertically downward. The downstream electrode portion 16a is integrally attached to the upper portion of the downstream flange portion 16 so as to protrude upward. In the illustrated example, the downstream electrode portion 16a is integrally attached to the top portion of the downstream flange portion 16 so as to protrude vertically upward. Therefore, the position of the upstream electrode portion 15a and the position of the joint portion 14a are different in the circumferential direction of the tubular portion 14, and both the position of the downstream electrode portion 16a and the position of the joint portion 14a are the It is different in the circumferential direction. In other words, the upstream electrode portion 15a and the joint portion 14a have different angular positions in the circumferential direction of the tubular portion 14, and both the downstream electrode portion 16a and the joint portion 14a are arranged in the circumferential direction of the tubular portion 14. are different in angular position (details will be described later).

It should be noted that the first transfer pipe P1 is not limited to the illustrated configuration as long as the positions of the two

electrode portions

15a and 16a and the position of the joint portion 14a are different in the circumferential direction. For example, the upstream electrode portion 15a may project obliquely downward from the lower portion of the upstream flange portion 15 other than the bottom portion, and the downstream electrode portion 16a may project obliquely upward from the upper portion of the downstream flange portion 16 other than the top portion. May protrude. Further, the upstream electrode portion 15a and the downstream electrode portion 16a do not have to be attached 180 degrees apart from each other as shown in the figure. Furthermore, the seam portion 14a may be provided at another position in the circumferential direction of the tubular portion 14 as long as the position is different from that of the upstream electrode portion 15a and the downstream electrode portion 16a. Even in this case, it is preferable to provide the seam portion 14a at a position other than the top and bottom portions of the tubular portion 14 .

Here, the first transfer pipe P1 will be described in more detail with reference to FIG. In the figure, L1 and L2 are straight lines extending from the tube axis Z to the centers of the two

electrode portions

15a and 16a in the circumferential direction, and Lx is a straight line extending from the tube axis Z to the joint portion 14a. and the joint portion 14a is defined as α1, and the angle formed between the downstream electrode portion 16a and the joint portion 14a is defined as α2, the angles α1 and α2 are both 90°. In this case, regardless of whether or not the upstream electrode portion 15a and the downstream electrode portion 16a are attached with an interval of 180°, the angles α1 and α2 are both preferably 15° or more, and 30°. More preferably, the angle is 45° or more, and more preferably 45° or more. More specifically, the joint portion 14a is formed on one side (the direction of arrow a1 in the example shown in FIG. 4) and the other side (the direction of arrow b1 in the example shown in FIG. It is preferably provided at positions different from each other by 15° or more, more preferably at positions different from each other by 30° or more, and further preferably at positions different by 45° or more. Even in such a case, the seam portion 14a is preferably provided at a position other than the top portion and the bottom portion of the tubular portion 14. As shown in FIG. When the upstream electrode portion 15a and the downstream electrode portion 16a are attached at a predetermined angle (180° in the example shown), the joint portion 14a is located between the upstream electrode portion 15a and the downstream electrode portion. With reference to the central position in the circumferential direction up to 16a, the difference is preferably within a range of 10°, more preferably within a range of 5°, with respect to both the one side and the other side in the circumferential direction.

With the configuration as described above, damage to the first transfer pipe P1 can be suppressed and durability can be enhanced. More specifically, the seam portion 14a of the tubular portion 14 is easily damaged because its strength decreases as a result of joining by welding or the like. Moreover, at the circumferential positions of the tubular portion 14 corresponding to the mounting positions of the

electrode portions

15a and 16a, the current density increases and the temperature becomes high, so that the portions are easily damaged by heat. Therefore, if the positions of either one or both of the two

electrode portions

15a and 16a and the position of the joint portion 14a of the tubular portion 14 overlap in the circumferential direction, the tubular portion 14 and thus the first transfer pipe P1 may be damaged. becomes significantly easier. According to the configuration here, such a problem is avoided, and damage to the tubular portion 14 and thus to the first transfer pipe P1 is effectively suppressed.

If the joint portion 14a is provided at a position other than the top and bottom portions of the tubular portion 14, the following advantages can be obtained. That is, when the interior of the tubular portion 14 is filled with the molten glass Gm, the molten glass Gm can reach the highest temperature around the top of the tubular portion 14, so the top of the tubular portion 14 is easily damaged. Moreover, air pockets are likely to occur in the molten glass Gm around the top portion of the tubular portion 14, causing problems such as the top portion of the tubular portion 14 being oxidized and becoming thin. In addition, when the periphery of the top of the tubular portion 14 is no longer in contact with the molten glass Gm due to the presence of an air pocket or the tubular portion 14 not being filled with the molten glass Gm, the top of the tubular portion 14 itself becomes even hotter. damage easily. Therefore, it is preferable to exclude the top portion of the tubular portion 14 and provide the seam portion 14a. Further, the bottom of the tubular portion 14 is easily damaged because it is the portion most affected by the weight of the molten glass. Therefore, it is preferable to exclude the bottom portion of the tubular portion 14 and provide the seam portion 14a.

5 and 6 illustrate the transfer pipe P2 (hereinafter referred to as the second transfer pipe P2) according to the second example. In this embodiment, the second transfer pipe P<b>2 constitutes the clarification tank 5 and the midstream connection pipe 9 . FIG. 5 is a perspective view showing the second transfer pipe P2, and FIG. 6 is a longitudinal front view cut along line CC of FIG. This second transfer pipe P2 differs from the above-described first transfer pipe P1 in that both the upstream electrode portion 15a and the downstream electrode portion 16a are located above the upstream flange portion 15 and the downstream flange portion 16. (Top part in the figure) is integrally attached so as to protrude upward (vertically upward in the figure). The seam portion 14a is provided at an intermediate position in the circumferential direction between the top portion and the bottom portion of the tubular portion 14 (the middle position in the circumferential direction from the top portion to the bottom portion in the figure). With such a configuration, the above-described effect can be obtained due to the position of the two

electrode portions

15a and 16a and the position of the joint portion 14a being different in the circumferential direction. The configuration of the second transfer pipe P2 is not limited to that shown in the figure, as long as the positions of the two

electrode portions

15a and 16a and the position of the joint portion 14a are different in the circumferential direction. For example, both the

electrode portions

15a and 16a may protrude obliquely upward from the upper portions of the

flange portions

15 and 16 other than the top portions, vertically downward from the bottom portions of the

flange portions

15 and 16, or from the lower portions other than the bottom portions. It may protrude obliquely downward. Also, the position of the seam portion 14a may be other positions as long as they are different from the respective positions of the two

electrode portions

15a and 16a in the circumferential direction. Regardless of whether the

electrode portions

15a and 16a protrude upward, the seam portion 14a extends from the

electrode portions

15a and 16a to one side in the circumferential direction (the arrow a2 direction side in the example shown in FIG. 6) and It is preferable to provide them at positions different from each other by 15° or more, more preferably at positions different from each other by 30° or more, and more preferably at positions different by 45° or more from the other side (in the example shown in FIG. 6, the direction of arrow b2). More preferred. However, in the illustrated example, the position of the seam portion 14a is located on both one side and the other side in the circumferential direction with reference to the center position in the circumferential direction from both the

electrode portions

15a and 16a to the bottom portion of the tubular portion 14. The difference is preferably within a range of 10°, more preferably within a range of 5°. Other matters to be explained are the same as those explained above for the first transfer pipe P1.

7 and 8 illustrate the transfer pipe P3 (hereinafter referred to as the third transfer pipe P3) according to the third example. In this embodiment, the third transfer pipe P3 constitutes the clarification tank 5 and the midstream connection pipe 9 . FIG. 7 is a perspective view showing the third transfer pipe P3, and FIG. 8 is a longitudinal front view cut along line DD in FIG. This third transfer pipe P3 differs from the above-described first transfer pipe P1 in that the upstream electrode portion 15a is laterally positioned on one lateral side (left side in the figure) of the upstream flange portion 15. , and the downstream electrode portion 16a is attached to the other side of the downstream flange portion 16 in the lateral direction (right side in the example of the figure). In the example shown in the figure, it protrudes to the right) and is attached integrally. In the illustrated example, the upstream electrode portion 15a and the downstream electrode portion 16a are integrally attached to protrude horizontally from the top to the bottom of the

flange portions

15 and 16 in the circumferential direction. there is The joint portion 14a is provided in the upper portion of the tubular portion 14 (a position other than the top portion). More specifically, the seam portion 14a is provided at the center position in the circumferential direction from the downstream electrode portion 16a to the top portion of the tubular portion 14. As shown in FIG. With such a configuration, the above-described effect can be obtained due to the position of the two

electrode portions

15a and 16a and the position of the joint portion 14a being different in the circumferential direction. The configuration of the third transfer pipe P3 is not limited to the illustrated example as long as the positions of the two

electrode portions

15a and 16a and the position of the joint portion 14a are different in the circumferential direction. For example, both

electrode portions

15a and 16a may be attached to only one lateral side portion of the

corresponding flange portions

15 and 16, and may protrude in a lateral direction other than the horizontal direction. good too. Also, the position of the seam portion 14a may be any other position as long as it is different from the positions of the

electrode portions

15a and 16a in the circumferential direction. Regardless of whether the

electrode portions

15a and 16a protrude in the horizontal direction, the joint portion 14a is located on one side of the circumferential direction of both the

electrode portions

15a and 16a (in the example shown in FIG. 8, It is preferably provided at a position different from both the arrow a3 direction side) and the other side (the arrow b3 direction side in the example shown in FIG. 8) by 15° or more, more preferably at a position different by 30° or more, 45° or more It is more preferable to provide them at different positions. However, in the illustrated example, the position of the seam portion 14a is on one side and the other side in the circumferential direction with reference to the center position in the circumferential direction from the two

electrode portions

15a and 16a to the top or bottom of the tubular portion 14, respectively. are preferably within a range of 10°, more preferably within a range of 5°. Other matters to be explained are the same as those explained above for the first transfer pipe P1.

9 and 10 illustrate the transfer pipe P4 (hereinafter referred to as the fourth transfer pipe P4) according to the fourth example. In this embodiment, the fourth transfer pipe P4 constitutes the upstream connection pipe 8 and the cooling pipe 10, and in some cases also constitutes the clarification tank 5. 9 is a perspective view showing the fourth transfer pipe P4, and FIG. 10 is a longitudinal front view cut along line EE in FIG. The fourth transfer pipe P4 differs from the first transfer pipe P1 described above in that the downstream side of the tubular portion 14 is inclined upward from the horizontal plane by an angle β. In this case, both the upstream flange portion 15 and the downstream flange portion 16 are provided at the upstream end and the downstream end of the tubular portion 14 so that their end surfaces (flat surfaces) are along the vertical plane. Therefore, the inflow port 14b of the tubular portion 14 has an oblong shape elongated in the vertical direction (the same applies to the outflow port). The transfer pipe P4 according to the fourth example may be obtained by tilting the second transfer pipe P2 and the third transfer pipe P3 by the angle β in the same manner as described above. Other matters to be explained are the same as the matters explained for the above-mentioned first transfer pipe P1.

Although the glass article manufacturing apparatus and manufacturing method according to the embodiment of the present invention have been described above, the present invention is not limited to this, and various variations are possible without departing from the spirit of the present invention.

In the above embodiments, the present invention is applied to the transfer device used to manufacture plate glass, but the present invention is applied to the transfer device used to manufacture glass articles other than plate glass (for example, glass tubes, glass fibers, etc.). You may

The seams may be provided at the top or bottom of the tubular portion, but it is preferable not to provide the seams at the top and bottom of the tubular portion as in the above embodiments.

In the above embodiment, the flanges and the electrodes are provided at both ends in the longitudinal direction of the tubular portion. A flange portion and an electrode portion may be provided in the portion.

1 Glass article manufacturing device 2 Melting furnace 3 Transfer device 4 Forming device 5 Clarifying tank 6 Stirring tank 8 Upstream connecting pipe 9 Midstream connecting pipe 10 Cooling pipe 14 Tubular portion 14a Joint portion 15 Flange portion (upstream side flange portion)
15a electrode part (upstream electrode part)
16 flange (downstream flange)
16a electrode part (downstream electrode part)
Gm Molten glass Gr Glass ribbon P1 Transfer pipe (first transfer pipe)
P2 transfer pipe (second transfer pipe)
P3 transfer pipe (third transfer pipe)
P4 transfer pipe (fourth transfer pipe)
Z tube axis

Claims

A glass article manufacturing apparatus comprising a transfer pipe for transferring molten glass,
The transfer pipe includes a tubular portion into which molten glass flows, and an electrode portion attached to the outer peripheral side of the tubular portion for applying an electric current to the tubular portion,
The tubular portion has a joint portion extending along the tube axis direction,
An apparatus for manufacturing a glass article, wherein the position of the electrode portion and the position of the joint portion are different in the circumferential direction of the tubular portion.
The apparatus for manufacturing glass articles according to claim 1, wherein the electrode section is attached to a flange section provided on the tubular section.
The tubular portion is arranged such that the tube axis direction is along the horizontal direction or the inclined direction,
The apparatus for manufacturing a glass article according to claim 1 or 2, wherein the joint portion is provided at a position other than the top portion in the circumferential direction of the tubular portion.
The tubular portion is arranged such that the tube axis direction is along the horizontal direction or the inclined direction,
The apparatus for manufacturing a glass article according to any one of claims 1 to 3, wherein the joint portion is provided at a position other than the bottom portion in the circumferential direction of the tubular portion.
The apparatus for manufacturing glass articles according to any one of claims 1 to 4, wherein the transfer pipe constitutes a clarification tank.
The apparatus for manufacturing glass articles according to any one of claims 1 to 5, wherein the transfer pipe constitutes an upstream connection pipe that connects the melting furnace and the clarification tank.
A method for manufacturing a glass article, comprising a step of transferring molten glass using a transfer pipe provided in the manufacturing apparatus according to any one of claims 1 to 6.