CN110291048B - Glass manufacturing method and method for preheating glass supply pipe - Google Patents
Glass manufacturing method and method for preheating glass supply pipe Download PDFInfo
- Publication number
- CN110291048B CN110291048B CN201780086195.8A CN201780086195A CN110291048B CN 110291048 B CN110291048 B CN 110291048B CN 201780086195 A CN201780086195 A CN 201780086195A CN 110291048 B CN110291048 B CN 110291048B
- Authority
- CN
- China
- Prior art keywords
- glass
- glass supply
- closing
- preheating
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/08—Feeder spouts, e.g. gob feeders
- C03B7/094—Means for heating, cooling or insulation
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
- C03B5/435—Heating arrangements for furnace walls
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/08—Feeder spouts, e.g. gob feeders
- C03B7/094—Means for heating, cooling or insulation
- C03B7/096—Means for heating, cooling or insulation for heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
Abstract
The glass manufacturing method comprises the following steps: a preheating step preceding the glass supply step, wherein the glass supply pipe (7) is electrically heated in a state of being separated from the glass supply paths (6 a-6 d); and a glass supply path forming step, after the preheating step, in which glass supply paths (6 a-6 d) are formed by connecting glass supply pipes (7). The preheating step includes a closing step of closing at least a part of the opening (7a) of the glass supply tube (7) with a closing member (16).
Description
Technical Field
The present invention relates to a glass manufacturing method and a method for preheating a glass supply pipe.
Background
As is well known, glass substrates for Flat Panel Displays (FPDs) such as Liquid Crystal Displays (LCDs) and organic EL displays (OLEDs) are representative, and glass sheets used in various fields require strict product quality with respect to surface defects and waviness.
In order to satisfy the above-described requirements, a down-draw method is widely used as a method for producing a glass sheet. As the down-draw method, an overflow down-draw method and a slit down-draw method are known.
The overflow down-draw method is a method of pouring molten glass into an overflow trough provided at the upper part of a forming body having a substantially wedge-shaped cross section, allowing the molten glass overflowing from the overflow trough to both sides to flow down along the side wall parts of the forming body on both sides, and integrally fusing the molten glass at the lower end part of the forming body to continuously form a single glass sheet. The slit down-draw method is a method in which a slit-shaped opening is formed in the bottom wall of a molded body to which molten glass is supplied, and the molten glass is caused to flow downward through the opening to continuously mold a single glass sheet.
In particular, in the overflow downdraw method, the front and back surfaces of the formed glass sheet are formed without contacting any part of the formed body during the forming process, and therefore, the formed glass sheet becomes a forged surface which is very flat and flawless and has no defects such as scratches.
As disclosed in patent document 1, a glass sheet manufacturing apparatus using an overflow down-draw method includes: a molding groove having a molded body therein; an annealing furnace disposed below the forming tank; and a cooling unit and a cutting unit provided below the annealing furnace. The glass sheet manufacturing apparatus is configured such that molten glass is caused to overflow from the top of a formed body, the molten glass is fused at the lower end portion to form a glass sheet (glass ribbon), the glass sheet is caused to pass through an annealing furnace to remove internal strain, and after the glass sheet is cooled to room temperature by a cooling section, the glass sheet is cut into a predetermined size by a cutting section.
Prior art documents
Patent document
Patent document 1: japanese laid-open patent publication No. 2012 and 197185
Disclosure of Invention
Problems to be solved by the invention
In the above glass sheet manufacturing apparatus, the glass raw material is melted in the glass melting tank disposed on the upstream side of the forming tank to form molten glass, and the molten glass is supplied to the forming tank on the downstream side. A glass supply path for transferring the molten glass to the forming vessel is provided between the melting vessel and the forming vessel. The glass supply path is formed by connecting a plurality of glass supply tubes made of metal such as platinum.
The molten glass conveyed from the glass supply path has a high temperature of 1600 ℃ or higher, for example. When the glass supply path is at a low temperature, the molten glass is difficult to flow in the supply path and is deteriorated, and therefore, it is necessary to heat (preheat) the glass supply path in advance when the glass manufacturing apparatus is operated. In this case, when heating is performed in a state where the glass supply pipes are connected, the connected portions may be deformed or damaged due to expansion of the glass supply pipes. Therefore, it is desirable to heat the glass supply path separately for each glass supply pipe.
In this case, since the glass supply pipe is formed in a cylindrical shape, there are problems as follows: in heating, heat inside is dissipated to the outside through the opening, which increases heat loss, and thus, preheating cannot be performed efficiently.
The present invention has been made in view of the above circumstances, and an object of the present invention is to efficiently preheat a glass supply tube.
Means for solving the problems
The present invention is to solve the above problems, and includes: a melting step of melting a glass raw material to produce a molten glass; a forming step of forming the molten glass; and a glass supply step of transferring the molten glass from the melting step to the forming step through a glass supply path formed by connecting a plurality of glass supply pipes, wherein the glass production method further comprises: a preheating step prior to the glass supply step, in which the glass supply pipe is heated by energization in a state where the glass supply pipe is separated in advance; and a glass supply path forming step, after the preheating step, of forming the glass supply path by connecting the glass supply tubes, wherein the preheating step includes a closing step of closing at least a part of an opening of the glass supply tube with a closing member.
As described above, in the preheating step, the glass supply tube is heated by energization in a state in which at least a part of the opening of the glass supply tube is closed by the closing member. Therefore, heat loss due to heat dissipation in the glass supply pipe through the opening portion can be reduced as much as possible, and preheating of the glass supply pipe can be performed efficiently.
In the above glass manufacturing method, the blocking member is preferably made of a flexible heat-resistant member, and may be made of, for example, a blanket made of heat-resistant fibers. However, the blocking member is not limited to this, and may be a refractory plate member such as a refractory plate. This facilitates handling of the blocking member in the preheating step.
Further, it is preferable that the glass supply tube includes: a cylindrical body portion housed in the housing; and a flange portion formed at an end of the main body portion, wherein in the closing step, the closing member closes the opening of the glass supply tube in a state of being in contact with the flange portion, and is supported by the housing via a fixing member.
Thus, the main body of the glass supply tube is covered with the outer cover, and the opening of the glass supply tube is closed by the closing member, whereby the glass supply tube can be efficiently heated. The closing member is supported by the housing via the fixing member, thereby stably closing the opening.
In the preheating step, it is preferable that an outer peripheral surface of the glass supply pipe is surrounded by a refractory. This reduces heat loss due to heat dissipation from the outer peripheral surface of the main body of the glass supply pipe. Therefore, the preheating of the glass supply pipe can be performed more efficiently.
Further, the method for preheating a glass supply tube of the present invention comprises: a preheating step of electrically heating the plurality of glass supply tubes; and a glass supply path forming step, after the preheating step, of forming a glass supply path by connecting the glass supply tubes, wherein the preheating step includes a closing step of closing at least a part of an opening of the glass supply tube with a closing member.
Effects of the invention
According to the present invention, the glass supply pipe can be efficiently preheated.
Drawings
Fig. 1 is a side view of a glass manufacturing apparatus according to a first embodiment.
Fig. 2 is a side view showing a part of the glass supply path.
Fig. 3 is a side view showing a state where the glass supply path is separated into each glass supply tube.
Fig. 4 is a perspective view of a glass supply tube illustrating a step of the glass manufacturing method.
FIG. 5 is a side view of a glass supply pipe showing a step of the glass production method.
FIG. 6 is a front view of a glass supply tube showing a step of the glass production method.
Fig. 7 is a side view of a glass supply tube illustrating a step of the glass manufacturing method according to the second embodiment.
FIG. 8 is a front view of a glass supply tube showing a step of the glass production method.
Fig. 9 is a side view of a glass supply tube illustrating a step of the glass manufacturing method according to the third embodiment.
FIG. 10 is a front view of a glass supply tube showing a step of the glass production method.
Detailed Description
The present embodiment will be described below with reference to the drawings. Fig. 1 to 6 show a first embodiment of a glass manufacturing apparatus and a glass manufacturing method according to the present invention.
As shown in fig. 1, the glass manufacturing apparatus of the present embodiment includes, in order from the upstream side: a melting tank 1, a clarifying tank 2, a homogenizing tank 3, a state adjusting tank 4, a forming tank 5, and glass supply paths 6a to 6d connecting the tanks 1 to 5. In addition, the glass manufacturing apparatus may include an annealing furnace (not shown) for performing strain relief processing of the glass sheet GR molded by the molding tank 5, and a cutting device (not shown) for cutting the glass sheet GR after the strain relief processing.
The melting vessel 1 is a vessel for performing a melting step of melting an input glass raw material to produce molten glass GM. The melting tank 1 is connected to the clarifying tank 2 via a glass supply channel 6a. The fining vessel 2 is a vessel for performing a fining process of defoaming the molten glass GM supplied from the melting vessel 1 by the action of a fining agent or the like. The clarifier 2 is connected to the homogenizer 3 via a glass supply path 6b.
The homogenizing tank 3 is a vessel used in the homogenizing step of stirring and homogenizing the clarified molten glass GM with a stirring blade or the like. The homogenization tank 3 is connected to the state adjustment tank 4 via a glass supply path 6c. The state adjustment tank 4 is a vessel for performing a state adjustment step of adjusting the molten glass GM to a state suitable for molding. The state adjustment tank 4 is connected to the forming tank 5 via a glass supply path 6d.
The forming tank 5 is a container for forming the molten glass GM into a desired shape. In the present embodiment, the forming vessel 5 forms the molten glass GM into a plate shape by the overflow downdraw method. More specifically, the forming groove 5 has a substantially wedge-shaped cross-sectional shape (cross-sectional shape perpendicular to the paper surface of fig. 1), and an overflow groove (not shown) is formed in an upper portion of the forming groove 5.
After the molten glass GM is supplied to the overflow vessel through the glass supply path 6d, the forming vessel 5 overflows the overflow vessel and flows down along the side wall surfaces on both sides of the forming vessel 5 (the side surfaces on the front and back sides of the paper surface). The forming vessel 5 fuses the molten glass GM flowing down at the lower end of the side wall surface, and forms a glass sheet GR.
The glass sheet GR thus formed has a thickness of, for example, 0.01 to 10mm, and is used for flat panel displays such as liquid crystal displays and organic EL displays, substrates such as organic EL illuminators and solar cells, and protective covers. The forming groove 5 may be a member that performs another down-draw method such as a slit down-draw method.
The glass supply paths 6a to 6d are components for performing a glass supply step of transferring the molten glass GM from the melting tank 1 on the upstream side to the forming tank 5 on the downstream side. As shown in fig. 2, the glass supply paths 6a to 6d are formed by connecting a plurality of glass supply pipes 7. The plurality of glass supply tubes 7 constituting the glass supply paths 6a to 6d are connected to each other via an insulating member 8. The insulating member 8 is formed in a ring shape having an opening at a central portion thereof.
As shown in fig. 3, the glass supply paths 6a to 6d can be separated into the glass supply pipes 7. The glass supply pipe 7 is made of platinum or a platinum alloy. The glass supply tube 7 is covered by an elongated cover 9. The glass supply pipe 7 includes: a long main body 10 for transferring molten glass GM; and electrically heated portions 11a and 11b provided at end portions of the main body portion 10.
The body portion 10 is configured to be cylindrical (for example, cylindrical), but is not limited to this shape. The main body 10 is formed longer than the housing 9. Therefore, each end of the body 10 protrudes in the longitudinal direction from the end of the housing 9.
The electrically heated portions 11a, 11b include: a first energization heating portion 11a provided at one end portion of the main body portion 10; and a second conductive heating portion 11b provided at the other end portion of the main body portion 10. Each of the electrically conductive heating portions 11a and 11b includes: a flange portion 12 configured to surround an outer peripheral surface at an end portion of the main body portion 10; and an electrode portion 13 integrally formed on an upper portion of the flange portion 12. The respective conductive heating portions 11a and 11b directly electrically heat the body portion 10 by applying a predetermined voltage to the electrode portion 13.
The flange portion 12 is formed in a disc shape, but is not limited to this shape. The electrode portion 13 is a rectangular plate portion protruding upward from the upper portion of the flange portion 12, but is not limited to this shape.
The cooling portion 14 is provided on the surface (outer surface) of the flange portion 12. The cooling unit 14 is constituted by a pipe through which a cooling medium can flow. The cooling portion 14 is fixed to the surface of the flange portion 12 by welding or other means. The cooling portion 14 is made of copper, nickel alloy, or other metal. The cooling portion 14 includes a first portion 14a disposed on the flange portion 12 and a second portion 14b disposed on the electrode portion 13.
The first portion 14a is formed in a circular shape along the edge of the flange portion 12 formed in a circular plate shape. The second portion 14b is linearly formed along the longitudinal direction (vertical direction) of the electrode portion 13. The second portion 14b includes: an inflow portion 14c that supplies the cooling medium to the first portion 14 a; and a discharge portion 14d that takes out the cooling medium that has passed through the first portion 14 a. As the cooling medium flowing through the cooling unit 14, water, air, or other various fluids are used.
The housing 9 is made of steel or other metal, and is not limited to this shape. The casing 9 houses a refractory material (e.g., firebricks) 15 disposed so as to surround the outer peripheral surface of the main body 10 of the glass supply pipe 7. The inner diameter of the housing 9 is set larger than the outer diameter of the main body 10 of the glass supply tube 7. Thus, a space capable of accommodating the refractory 15 is formed between the casing 9 and the main body 10. The housing 9 is supported by a not-shown stand or the like so as to be capable of changing its position in a building such as a factory in which the glass manufacturing apparatus is disposed.
A method for manufacturing the glass sheet GR using the glass manufacturing apparatus having the above-described configuration will be described below.
In the method, after a raw material glass is melted in a melting tank 1 (melting step) to obtain a molten glass GM, the molten glass GM is subjected to a fining step in a fining vessel 2, a homogenizing step in a homogenizing vessel 3, and a state adjusting step in a state adjusting vessel 4 in this order. Thereafter, the molten glass GM is transferred to the forming vessel 5, and a glass sheet GR is formed from the molten glass GM in the forming vessel 5 (forming step). The molten glass GM is transferred from the melting tank 1 to the forming tank 5 through the glass supply paths 6a to 6d (glass supply step). After the forming step, the internal strain of the glass sheet GR is removed by an annealing furnace (annealing step). After the annealing step, the glass sheet GR is cut into a predetermined size (cutting step), or wound into a roll shape (winding step).
When the series of steps as described above is performed, it is necessary to heat the glass supply paths 6a to 6d and the other components 1 to 5 in advance (preheating step). The preheating step is performed for each of the glass supply lines 6a to 6d in a state where the glass supply line is separated into the glass supply pipes 7 as the components thereof.
The preheating step (preheating method) of the glass supply tube 7 will be described in detail below with reference to fig. 4 to 6. The preheating step includes a step of closing the opening 7a at the end of the glass supply tube 7 (closing step) and a step of heating the glass supply tube 7 (heating step).
In the closing step, the opening 7a of the glass supply tube 7 is closed by the closing member 16. The blocking member 16 is preferably made of a member having heat resistance and flexibility, such as a blanket made of heat-resistant fibers or flame-resistant paper. The blocking member 16 is made of, for example, ceramic fibers such as alumina fibers, but is not limited to this structure. The blocking member 16 may be made of a refractory plate, a refractory brick, or another plate-like member having heat resistance. The shape of the blocking member 16 may be a shape corresponding to the shape of the opening 7a, for example, may be a similar shape to the opening 7 a. In the present embodiment, the blocking member 16 is formed in a thick sheet shape having a circular main surface. The closing member 16 has a diameter larger than the opening 7a of the glass supply tube 7 and smaller than the diameter of the first portion 14a (circular portion) of the cooling portion 14. Thus, the closing member 16 does not contact the cooling portion 14, but contacts the surface (outer surface) of the flange portion 12. The shape of the blocking member 16 is not limited to the above shape, and may be a rectangular shape, an elliptical shape, or the like.
The closing member 16 is supported by the housing 9 via a fixing member 17. The fixing member 17 is made of a heat-resistant linear member. The fixing member 17 is preferably made of a material having elasticity so as to expand and contract in accordance with expansion of the main body 10 and the like. Specifically, for example, a rope made of twisted ceramic fibers can be used as the fixing member 17. The housing 9 has a plurality of (four in the drawing) support portions 18 for locking the fixing member 17. Each support portion 18 is a plate portion protruding from the outer peripheral surface of the housing 9, but is not limited to this shape.
The support portion 18 has a portion (engaging portion) 18a that engages with the fixing member 17. The fixing member 17 is wound around the closing member 16 in a state where the closing member 16 is brought into contact with the flange portion 12 to close the opening 7a of the body 10. The fixing member 17 is locked to the locking portion 18a to fix the closing member 16 to the flange portion 12.
After the closing step is completed, the process proceeds to a heating step. In the heating step, a voltage is applied to the electrode portion 13 to start heating. In the heating step, the cooling medium is circulated through the cooling unit 14 to cool the respective electrically-powered heating units 11a and 11b and heat the main body unit 10. The closing member 16 is removed from the glass supply tube 7 after being heated to a temperature sufficient to transfer the molten glass GM. The glass supply tube 7 from which the blocking member 16 is removed is connected to another glass supply tube 7. The glass supply lines 6a to 6d are formed by connecting a plurality of glass supply pipes 7 (glass supply line forming step). In the glass supply path forming step, it is preferable that the closing member 16 is detached in a state in which the openings 7a of the connected glass supply tubes 7 are adjacent to each other in advance so as to face each other, and the glass supply tubes 7 are immediately connected. According to the above-described connection method, the glass supply lines 6a to 6d can be formed while maintaining the glass supply pipe 7 at a high temperature.
Thereafter, the glass supply paths 6a to 6d are connected to the corresponding other components 1 to 5, and the glass manufacturing apparatus is assembled (assembling step of the glass manufacturing apparatus). In addition, the other components 1 to 5 except the glass supply paths 6a to 6d are provided with an electric heating portion at an important position. In each of the components 1 to 5, a heating process by an electric heating unit is performed in synchronization with the preheating of the glass supply pipe 7.
Thereafter, the melting step, the refining step, the homogenizing step, the state adjusting step, the forming step, and the like described above are performed to manufacture the glass sheet GR.
In the glass manufacturing method (the method of preheating the glass supply tube 7) of the present embodiment described above, in the preheating step, the opening 7a of the glass supply tube 7 is closed by the closing member 16, and the inside of the main body 10 is shielded from the outside. This can reduce heat loss due to heat of the main body 10 being dissipated from the inside to the outside through the opening 7a as much as possible. This enables the glass supply pipe 7 to be efficiently preheated.
The closing member 16 is fixed to the flange portion 12 so as not to contact the cooling portion 14 of each of the energization heating portions 11a and 11 b. Therefore, the cooling portion 14 can be prevented from being excessively heated due to the contact of the blocking member 16 with the cooling portion 14.
Fig. 7 and 8 show a second embodiment of the present invention. In the first embodiment described above, the closing member 16 is formed in a disc shape, but in the present embodiment, it is formed in a rectangular shape. The blocking member 16 is sized to be larger than the diameter of the first portion 14a of the cooling portion 14. Therefore, the blocking member 16 covers the respective electrically conductive heating portions 11a and 11b in a wider range than in the first embodiment. This prevents heat from being released from the opening 7a of the glass supply pipe 7 (main body 10), and also prevents heat from being released from the surface of the flange 12. This enables the glass supply pipe 7 to be efficiently preheated.
Fig. 9 and 10 show a third embodiment of the present invention. In the present embodiment, the closing member 16 is a circular plate member or block material having an area almost equal to the opening area of the opening 7a of the glass supply tube 7. The closing member 16 closes the opening 7a of the glass supply tube 7 by inserting the opening 7 a. In this case, the blocking member 16 is held on the inner surface of the opening 7a of the glass supply tube, and thus the fixing member 17 and the support portion 18 of the housing 9 illustrated in the first embodiment are not required.
The present invention is not limited to the configurations of the above embodiments, and is not limited to the above-described operational effects. The present invention can be variously modified within a scope not departing from the gist of the present invention.
In the above-described embodiment, the example in which the opening 7a in the glass supply tube 7 of the glass supply paths 6a to 6d is closed by the closing member 16 is shown, but the present invention is not limited to this. The melting vessel 1, the clarifying vessel 2, the homogenizing vessel 3, the state adjusting vessel 4, and the forming vessel 5, which are other components of the glass manufacturing apparatus, have a function of transferring the molten glass GM, and they can be regarded as the glass supply pipe 7.
For example, the clarifying tank 2 is provided with an exhaust unit for exhausting gas generated by the defoaming treatment of the molten glass GM. In the present invention, it is desirable that the opening of the exhaust part is closed by the closing member 16 in addition to the opening of the clarifier 2 for outflow of the molten glass GM during the preheating step. In this way, the opening of the component to be preheated is closed by the closing member 16, and the preheating step can be efficiently performed.
In the above-described embodiment, the example in which the closing member 16 is fixed to the flange portion 12 of the energization heating portions 11a and 11b by the linear fixing member 17 is shown, but the present invention is not limited to this configuration. For example, the closing member 16 may be fixed to the flange portion 12 by clamping or other fixing means.
In the above-described embodiments, the glass sheet and the glass roll formed by winding the glass sheet in a roll shape are described as the glass manufacturing method, but the method is not limited to this. The present invention is applicable to a method of manufacturing a glass tube, a glass block, or other various glass products.
In the above-described embodiment, the example in which the opening 7a of the glass supply tube 7 is entirely closed by the closing member 16 is shown, but the present invention is not limited to this, and the preheating step may be performed by closing a part of the opening 7 a. That is, when a part of the opening 7a is closed by the closing member 16, a fine gap can be generated in the opening 7 a.
Description of reference numerals:
a glass supply path;
a glass supply path;
a glass supply path;
a glass supply path;
7 … glass supply tube;
7a … opening part;
9 … a housing;
10 … a body portion;
12 … flange portion;
16 … an occlusion member;
17 … a securing member;
GM … molten glass;
GR … glass plate.
Claims (8)
1. A method of making glass comprising:
a melting step of melting a glass raw material to produce a molten glass;
a forming step of forming the molten glass; and
a glass supply step of transferring the molten glass from the melting step to the forming step through a glass supply path formed by connecting a plurality of glass supply pipes,
the glass manufacturing method is characterized in that,
the glass manufacturing method further comprises:
a preheating step prior to the glass supply step, in which the glass supply pipe is heated by energization in a state where the glass supply pipe is separated in advance; and
a glass supply path forming step of forming the glass supply path by connecting the glass supply pipes after the preheating step,
the preheating step includes a closing step of closing at least a part of an opening of the glass supply tube with a closing member.
2. The glass manufacturing method according to claim 1,
the blocking member is made of a flexible heat-resistant member.
3. The glass manufacturing method according to claim 2,
the blocking member is a blanket composed of heat-resistant fibers.
4. The glass manufacturing method according to claim 1,
the blocking member is a fire-resistant plate member.
5. The glass manufacturing method according to any one of claims 1 to 4,
the glass supply pipe is provided with:
a cylindrical body portion housed in the housing; and
a flange portion formed at an end of the body portion,
in the closing step, the closing member closes the opening of the glass supply tube in a state of being in contact with the flange portion, and is supported by the housing via a fixing member.
6. The glass manufacturing method according to any one of claims 1 to 4,
in the preheating step, the outer peripheral surface of the glass supply pipe is surrounded by a refractory.
7. The glass manufacturing method according to claim 5,
in the preheating step, the outer peripheral surface of the glass supply pipe is surrounded by a refractory.
8. A method of preheating a glass supply tube, comprising:
a preheating step of electrically heating the plurality of glass supply tubes; and
a glass supply path forming step of forming a glass supply path by connecting the glass supply pipes after the preheating step,
the preheating step includes a closing step of closing at least a part of an opening of the glass supply tube with a closing member.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-024254 | 2017-02-13 | ||
| JP2017024254A JP6724813B2 (en) | 2017-02-13 | 2017-02-13 | Glass manufacturing method and glass feed pipe preheating method |
| PCT/JP2017/042273 WO2018146908A1 (en) | 2017-02-13 | 2017-11-24 | Glass manufacturing method and method for preheating glass supply tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110291048A CN110291048A (en) | 2019-09-27 |
| CN110291048B true CN110291048B (en) | 2021-07-06 |
Family
ID=63107328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780086195.8A Active CN110291048B (en) | 2017-02-13 | 2017-11-24 | Glass manufacturing method and method for preheating glass supply pipe |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6724813B2 (en) |
| KR (1) | KR102331496B1 (en) |
| CN (1) | CN110291048B (en) |
| TW (1) | TWI727124B (en) |
| WO (1) | WO2018146908A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7479357B2 (en) * | 2018-09-27 | 2024-05-08 | コーニング インコーポレイテッド | Glass manufacturing equipment electrical flange support assembly |
| KR20210064347A (en) * | 2018-09-27 | 2021-06-02 | 코닝 인코포레이티드 | Glass forming apparatuses including modular glass clarification systems |
| US11919800B2 (en) | 2018-09-27 | 2024-03-05 | Corning Incorporated | Modular molten glass delivery apparatus |
| JP7136015B2 (en) * | 2019-06-17 | 2022-09-13 | 日本電気硝子株式会社 | glass transfer device |
| WO2024038740A1 (en) * | 2022-08-19 | 2024-02-22 | 日本電気硝子株式会社 | Method for manufacturing glass article, and device for manufacturing glass article |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010535694A (en) * | 2007-08-08 | 2010-11-25 | ブルース テクノロジー エルエルシー | Molten glass conveyor for optical quality glass |
| JP2013216535A (en) * | 2012-04-06 | 2013-10-24 | Avanstrate Inc | Method and device for manufacturing glass plate |
| CN103508656A (en) * | 2012-06-29 | 2014-01-15 | 安瀚视特控股株式会社 | Method for manufacturing glass substrate |
| JP2014019629A (en) * | 2012-07-20 | 2014-02-03 | Nippon Electric Glass Co Ltd | Glass plate manufacturing apparatus and its assembly method |
| CN104944739A (en) * | 2014-03-31 | 2015-09-30 | 安瀚视特控股株式会社 | Glass substrate making method and glass substrate making device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4711171B2 (en) * | 2004-12-28 | 2011-06-29 | 日本電気硝子株式会社 | Sheet glass manufacturing apparatus and sheet glass manufacturing method |
| JP5656080B2 (en) | 2010-03-23 | 2015-01-21 | 日本電気硝子株式会社 | Manufacturing method of glass substrate |
| CN103183463B (en) * | 2011-03-31 | 2017-08-01 | 安瀚视特控股株式会社 | The manufacture method of glass substrate and the manufacture device of glass substrate |
-
2017
- 2017-02-13 JP JP2017024254A patent/JP6724813B2/en active Active
- 2017-11-24 WO PCT/JP2017/042273 patent/WO2018146908A1/en active Application Filing
- 2017-11-24 CN CN201780086195.8A patent/CN110291048B/en active Active
- 2017-11-24 KR KR1020197015247A patent/KR102331496B1/en active IP Right Grant
- 2017-12-06 TW TW106142650A patent/TWI727124B/en active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010535694A (en) * | 2007-08-08 | 2010-11-25 | ブルース テクノロジー エルエルシー | Molten glass conveyor for optical quality glass |
| JP2013216535A (en) * | 2012-04-06 | 2013-10-24 | Avanstrate Inc | Method and device for manufacturing glass plate |
| CN103508656A (en) * | 2012-06-29 | 2014-01-15 | 安瀚视特控股株式会社 | Method for manufacturing glass substrate |
| JP2014019629A (en) * | 2012-07-20 | 2014-02-03 | Nippon Electric Glass Co Ltd | Glass plate manufacturing apparatus and its assembly method |
| CN104944739A (en) * | 2014-03-31 | 2015-09-30 | 安瀚视特控股株式会社 | Glass substrate making method and glass substrate making device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201829327A (en) | 2018-08-16 |
| TWI727124B (en) | 2021-05-11 |
| KR102331496B1 (en) | 2021-11-26 |
| JP6724813B2 (en) | 2020-07-15 |
| KR20190113755A (en) | 2019-10-08 |
| WO2018146908A1 (en) | 2018-08-16 |
| CN110291048A (en) | 2019-09-27 |
| JP2018131345A (en) | 2018-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110291048B (en) | Glass manufacturing method and method for preheating glass supply pipe | |
| KR102110322B1 (en) | Apparatus for use in direct resistance heating of platinum-containing vessels | |
| JP6969573B2 (en) | Glass manufacturing equipment, glass manufacturing method, glass supply pipe and molten glass transfer method | |
| TWI752126B (en) | Support structure for glass supply pipe, plate glass manufacturing apparatus, plate glass manufacturing method, and preheating method for glass supply pipe | |
| WO2019230277A1 (en) | Method for manufacturing glass article | |
| CN113727949B (en) | Glass transfer device | |
| CN112912348B (en) | Method for manufacturing glass article | |
| JP7174360B2 (en) | Glass article manufacturing method, melting furnace and glass article manufacturing apparatus | |
| CN113412241A (en) | Glass manufacturing apparatus and method | |
| CN113677634B (en) | Glass transfer device | |
| JP7138843B2 (en) | Method for manufacturing glass article | |
| CN111032584B (en) | Method for producing glass article and melting furnace | |
| WO2023106093A1 (en) | Glass transfer device, glass article manufacturing device, and glass article manufacturing method | |
| KR20130001282A (en) | Glass plate production method | |
| CN117881636A (en) | Apparatus for producing glass article and method for producing glass article | |
| KR20230008057A (en) | Method for manufacturing a glass article and apparatus for manufacturing a glass article | |
| KR20210022523A (en) | Glass article manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |