JP2017065965A - Device for supplying glass raw material, apparatus for manufacturing glass raw material melt, method for supplying glass raw material, method for manufacturing glass and method for manufacturing glass component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device, etc., for supplying a glass raw material, capable of supplying two or more kinds of glass raw materials to a melting furnace while suppressing the occurrence of a problem such as deposition in the vicinity of a connection part between a material supply part of a compound vaporized in a glass melting furnace and high in volatility and the glass melting furnace.SOLUTION: A device 1 for supplying a glass raw material comprises: a cylindrical outer cylinder 2; a cylindrical inner cylinder 4 concentrically arranged in the outer cylinder; a spiral outside screw 6 arranged in a space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder; a spiral inside screw 10 arranged in the same direction as the outside screw in the inside of the inner cylinder; and a drive mechanism M for rotating and driving at least one of the inner cylinder and the outer cylinder around the central shaft so as to rotate the outside screw and the inside screw.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a glass raw material supply device, a glass raw material manufacturing device, a glass raw material supply method, a glass manufacturing method, and a glass element manufacturing method, and more specifically, a plurality of types of glass raw materials are supplied to a glass melting furnace. TECHNICAL FIELD The present invention relates to a glass raw material supply apparatus, a glass raw material melt manufacturing apparatus using the supply apparatus, a glass raw material supply method, a glass manufacturing method, and a glass element manufacturing method.

  In order to produce a glass element such as a glass lens, it is generally performed to melt a glass raw material in a melting furnace. When supplying the glass raw material to the melting furnace, for example, the glass raw material is introduced into the raw material inlet of the hopper, and this glass raw material is supplied into the melting furnace by a transport mechanism such as a screw feeder connected to the outlet of the hopper. ing.

  In order to produce glass or a glass element having a predetermined composition, it is generally performed to supply a plurality of types of glass raw materials prepared in advance to a melting furnace.

  Here, a plurality of types of glass raw materials having different diameters, for example, a powdery glass raw material (μm order diameter) and a massive glass raw material (mm order diameter) are melted from the same raw material inlet through the same raw material inlet. If it supplies to a furnace, a powdery glass raw material will be supplied preferentially and the smooth supply of the whole raw material will be inhibited.

  As a glass raw material supply device that improves such a state and supplies a plurality of types of glass raw materials to a melting furnace, an apparatus described in Patent Document 1 is known.

  In the apparatus described in Patent Document 1, in order to improve the distribution state of the glass raw material in the glass melting furnace, the glass raw material is supplied onto the molten glass in the melting furnace in the rear wall portion of the glass melting furnace. The raw material charging ports to be formed are formed at a plurality of locations separated in the width direction. 3. A screw feeder is installed behind each of the plurality of raw material inlets, and the distance between the centers of the adjacent screw feeders in the width direction is more than one time the opening width of the raw material inlet, and It is set to 5 times or less.

JP 2010-222217 A

  However, some elements in the glass raw material prepared to have a predetermined composition and supplied into the melting furnace may form a highly volatile compound and vaporize in the melting furnace. In some cases, this vaporized component forms a reaction product with a compound such as carbon, oxygen, and sulfur volatilized from the glass raw material. This reaction product has caused problems such as deposition in a portion having a relatively low temperature in the vicinity of the connection portion between the raw material supply portion and the melting furnace. Thereby, the manufacture of glass having a predetermined composition or glass element may be hindered.

  And the glass which is provided with the several raw material supply part as described in patent document 1, and supplies a glassy glass raw material from one raw material supply part, and a blocky glass raw material from another raw material supply part In the raw material supply apparatus, since a plurality of raw material supply units are used, the area or the number of portions where the above problem occurs is increased. As a result, the influence due to the above problem was remarkable.

The present invention provides a glass raw material supply apparatus capable of supplying a plurality of types of glass raw materials to a melting furnace while suppressing the occurrence of the above problems.
Moreover, this invention provides the manufacturing apparatus of the glass raw material melt using the above glass raw material supply apparatuses, the glass raw material supply method, the glass manufacturing method, and the manufacturing method of a glass element.

According to a preferred embodiment of the present invention,
A glass raw material supply device,
A cylindrical outer cylinder;
A cylindrical inner cylinder arranged concentrically in the outer cylinder;
A spiral external screw disposed in a space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder;
A spiral internal screw in the same direction as the external screw disposed inside the inner cylinder;
A glass raw material supply device is provided that includes a drive mechanism that rotationally drives at least one of an inner cylinder and an outer cylinder about a central axis thereof so that an external screw and an internal screw rotate.

  According to the present invention having such a configuration, since a plurality of types of glass raw materials can be supplied from the tip of the inner cylinder to a melting furnace or the like, the occurrence of problems due to highly volatile compounds from the melting furnace or the like Can be suppressed.

According to another aspect of the invention,
The glass raw material supply device;
A glass raw material melting furnace disposed downstream of the glass raw material supply device,
An apparatus for producing a glass raw material melt is provided.

According to another aspect of the invention,
A cylindrical outer cylinder;
A cylindrical inner cylinder arranged concentrically in the outer cylinder;
A spiral external screw disposed in a space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder;
A glass raw material supply method using a glass raw material supply device comprising a spiral internal screw in the same direction as an external screw disposed inside an inner cylinder,
A step of rotationally driving at least one of the inner cylinder and the outer cylinder around its central axis so that the external screw and the internal screw rotate;
Supplying and conveying the first glass raw material to the first conveying path in the space between the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder;
Supplying and conveying the second glass raw material to the second conveyance path in the space inside the inner cylinder;
A step of simultaneously discharging the first and second glass raw materials from the terminal ends of the first and second transport paths,
A method for supplying a glass raw material is provided.

According to another aspect of the invention,
A cylindrical outer cylinder;
A cylindrical inner cylinder arranged concentrically in the outer cylinder;
A spiral external screw disposed in a space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder;
A glass manufacturing method using a glass raw material supply device comprising a spiral internal screw in the same direction as an external screw disposed inside an inner cylinder,
A step of rotationally driving at least one of the inner cylinder and the outer cylinder around its central axis so that the external screw and the internal screw rotate;
Supplying and transporting the first glass raw material to the first transport path in the space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder;
Supplying and conveying the second glass raw material to the second conveyance path in the space inside the inner cylinder;
Supplying the first and second glass raw materials to the melting furnace simultaneously from the end of the first and second transport paths,
A method for producing glass is provided.

  Moreover, the manufacturing method of a glass element which manufactures glass by the manufacturing method of said glass, and manufactures a glass element using this glass is provided.

According to the present invention, while suppressing the occurrence of problems such as deposition in the vicinity of the connection portion between the raw material supply unit of the highly volatile compound vaporized in the glass melting furnace and the glass melting furnace, a plurality of types of glass raw materials are added. A glass raw material supply device that can be supplied to a melting furnace is provided.
ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the glass raw material melt using the above glass raw material supply apparatuses, the supply method of a glass raw material, the manufacturing method of glass, and the manufacturing method of a glass element are provided.

It is a typical side view which shows the state with which the supply apparatus was connected with the melting furnace which melts a glass raw material. It is a typical plane sectional view along the II-II line of FIG. It is a typical perspective view for demonstrating the detail of the inner cylinder of the supply apparatus of FIG. It is typical drawing which shows the different use condition of the supply apparatus of FIG. It is typical drawing which shows the modification of the hopper used with the supply apparatus of FIG. It is typical drawing which shows the different use condition of the supply apparatus of FIG. It is typical drawing which shows the different use condition of the supply apparatus of FIG. It is typical drawing which shows the structure of the supply apparatus of preferable embodiment of this invention.

  Hereinafter, a glass raw material supply apparatus 1 according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic side view showing a state in which a supply device 1 is connected to a melting furnace F that melts a glass raw material. FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG.

  The “glass element” in the present specification includes a glass lens having an optical function and a glass optical element such as a glass filter that absorbs or transmits only light in a specific wavelength region such as an infrared region. In addition, a cover glass (plate glass) having no optical function for protecting an image display surface of a portable digital device such as a smartphone or a mobile computer is also included.

  The glass raw material supply apparatus 1 according to an embodiment is configured such that a tip is connected to a side portion of the melting furnace F, and a plurality of types of glass raw materials are supplied into the melting furnace F from the side of the melting furnace F. Yes. The supply device 1 according to an embodiment separately melts a plurality of types of glass raw materials, ie, a glass raw material having a small diameter (first glass raw material) and a glass raw material having a relatively large diameter (second glass raw material). A device for supplying to a furnace.

  The first glass material is, for example, a powdery glass material. The powdery glass raw material is a glass raw material that has not been vitrified, and is hereinafter also referred to as “batch”. The second glass raw material is, for example, a blocky glass raw material having a diameter larger than that of the first glass raw material. The bulky glass raw material is, for example, a glass raw material that has already been vitrified, and is hereinafter also referred to as “cullet”. In addition, cullet refers to the glass which grind | pulverized suitably the produced glass (glass plate etc.).

  The glass composition produced is not limited. Specifically, a rare earth borate glass containing boric acid as a main component, a phosphate glass containing phosphoric acid as a main component, a silica glass containing silica as a main component, and a fluorophosphate glass containing fluorine as a main component. Various glass raw materials such as can be used.

  As shown in FIG. 1 and FIG. 2, a glass raw material supply device (hereinafter simply referred to as “supply device”) 1 is arranged concentrically within a cylindrical outer tube 2 and the outer tube 2. The cylindrical inner cylinder 4, the spiral external screw 6 disposed in the space between the inner peripheral surface of the outer cylinder 2 and the outer peripheral surface of the inner cylinder 4, and the inner cylinder 4. At least one of the inner cylinder 2 and the outer cylinder 4 is driven to rotate around its central axis so that the spiral internal screw 12 in the same direction as the external screw 6 and the external screw 6 and the internal screw 12 rotate. Driving mechanism (motor M).

  As described above, the spiral external screw 6 is disposed in the space between the inner peripheral surface of the outer cylinder 2 and the outer peripheral surface of the inner cylinder 4. In one embodiment, the external screw 6 is attached to the outer peripheral surface of the inner cylinder 4 over the entire length of the inner cylinder 4. The inner cylinder 4 is configured to be rotatable with respect to the outer cylinder 2 about the central axis.

  Further, the rotation of the external screw 6 is not hindered between the radially outer end of the blade of the external screw 6 constituted by the other end 8 b of the blade-like elongated member 8 and the inner peripheral surface of the outer cylinder 2. It arrange | positions so that the clearance gap of a grade may be formed.

  The spiral internal screw 10 in the same direction as the external screw 6 is arranged inside the inner cylinder 4 as described above. In one embodiment, the internal screw 10 is attached over the entire length of the inner cylinder 4.

  In one embodiment, the rear end of the inner cylinder 4 is connected to a motor M that constitutes a drive mechanism that rotates the inner cylinder 4 relative to the outer cylinder 2 about the central axis.

  A first hopper 14 and a second hopper 16 are provided at the rear end of the outer cylinder 2. The first hopper 14 has a lower end outlet connected to a space between the outer cylinder 2 and the inner cylinder 4, and a first conveyance path formed by a space between the outer cylinder 2 and the inner cylinder 4. For example, it is comprised so that the powdery glass raw material B with a diameter of 20-150 micrometers may be supplied.

  On the other hand, the 2nd hopper 16 is comprised so that the lump-like glass raw material C with a diameter of 1-10 mm may be supplied to the 2nd conveyance path comprised by the space in the inner cylinder 4, for example.

  The second hopper 16 is disposed at a position where the lower end portion 16 a is inserted into the outer cylinder 2 and the outlet 18 at the lower end faces the outer peripheral surface of the inner cylinder 4. An opening 20 provided in a part of the wall of the inner cylinder 4 is arranged at a position aligned with the outlet 18 of the second hopper 16 of the inner cylinder 4 in the longitudinal direction. That is, the opening 20 is arranged so as to be aligned vertically with the outlet 18 of the second hopper 16 when the inner cylinder 4 rotates and the opening 20 is positioned upward. Therefore, the opening 20 of the inner cylinder 4 is vertically aligned with the outlet 18 of the second hopper 16 at a constant cycle by the rotation of the inner cylinder 4.

Further, the second hopper 16 includes a valve 22 (opening / closing mechanism) for opening and closing the outlet 18. The opening and closing of the valve 22 is controlled by a control device (not shown).
According to such a configuration, only when the opening 20 is vertically aligned with the outlet 18 of the second hopper 16 by the rotation of the inner cylinder 4, the valve 22 is opened intermittently, and the contents of the second hopper 16 are removed. It is possible to supply the second transport path inside the inner cylinder 4 through the outlet 18 of the second hopper 16 aligned vertically and the opening 20 of the inner cylinder 4.

  In the supply device 1 of one embodiment, the external screw 6 is attached to the outer peripheral surface of the inner cylinder 4, but may be attached to the inner peripheral surface of the outer cylinder 2. In such a configuration, a drive mechanism is provided in which both the inner cylinder 4 and the outer cylinder 2 are driven to rotate about the central axis. In addition, another outer cylinder (not shown) is provided concentrically with the outer cylinder 4 on the outer periphery of the outer cylinder 4, and the first hopper 14 and the second hopper 16 are respectively connected via the other outer cylinder. Connected to the outer cylinder 2 and the inner cylinder 4. For example, two openings are provided in a part of another outer cylinder, and each opening is made to correspond to each lower end part of the 1st hopper 14 and the 2nd hopper.

  In the supply device 1 of one embodiment, the tip of the inner cylinder 4 (end on the melting furnace F side) and the tip of the outer cylinder 2 (end on the melting furnace F side) terminate at substantially the same longitudinal position. . The outer cylinder 2 and the inner cylinder 4 constitute a conveyance path for the glass raw material, and are formed of metal in one embodiment. However, it may be formed of other materials having high heat resistance and excellent durability.

  Thus, in the supply apparatus 1 of one embodiment, the space between the inner peripheral surface of the outer cylinder 2 and the outer peripheral surface of the inner cylinder 4 conveys a powdery glass raw material B having a diameter of about 20 to 150 μm, for example. For example, and the space inside the inner cylinder 4 becomes a second conveyance path for conveying a massive glass material C having a diameter of about 1 to 10 mm, for example.

  In one embodiment, the powdery glass raw material B is supplied to the first transport path, and the bulky glass raw material C is supplied to the second transport path. Conversely, the bulky glass raw material C is supplied to the first transport path. The bulk glass raw material B may be supplied to the raw material C and the second transport path, respectively.

  Here, a highly volatile compound from the melting furnace F may flow into the supply device, and a reaction product may be deposited on the inner wall or the like of the supply device. From the viewpoint of more efficiently blocking the inflow of a highly volatile compound, it is preferable to supply and transport the powdery glass raw material B to the first transport path. That is, it is preferable that the diameter of the 1st glass raw material supplied to a 1st conveyance path is smaller than the diameter of the 2nd glass raw material supplied to a 2nd conveyance furnace.

  Since the glass raw material flows down from the entire front end surface of the supply device, a “curtain” made of the glass raw material is formed on the front end surface. If this “curtain” is a “curtain” made of powdered glass, which is the first glass raw material having a small diameter, the “curtain” has a larger diameter than the “curtain” made of massive glass having a larger diameter than the second glass raw material. This is because the density is increased and the blocking property is improved.

  FIG. 3 is a schematic perspective view for explaining details of the inner cylinder 2 of the supply device of FIG. 1. The external screw 6 arranges a blade-like elongated member 8 such that one side end 8a is helically fixed to the outer peripheral surface of the inner cylinder 4 and the other side end 8b is positioned on the inner peripheral surface side of the outer cylinder 2. It is formed with the blade | wing comprised by this. The external screw 6 has the same configuration as that of a known blade of a screw feeder.

  The internal screw 10 has a blade-like elongate member 12 arranged such that one side end 12a is helically fixed to the inner peripheral surface of the inner cylinder 4 and the other side end 12b is positioned on the central axis side of the inner cylinder. It is formed with the blade | wing comprised by.

  Further, the radially inner end of the blade of the internal screw 10 constituted by the other end 12b of the blade-like elongated member 12 is located radially outward from the central axis of the inner cylinder 4, and as a result, the inner cylinder In the center of 4, a cylindrical space whose outer periphery is defined by the other end 12 b of the blade-like elongated member 12 extends over the entire length of the inner cylinder 4.

  The external screw 6 and the internal screw 10 constitute a conveying member that conveys the glass raw material, and in one embodiment, is formed of metal. However, it may be formed of other materials having high heat resistance and excellent durability.

  In the supply apparatus 1 according to the embodiment, first, a batch B having a diameter of, for example, about 20 to 150 μm is introduced into the first hopper 14, and a cullet C having a diameter of about 1 to 10 mm is introduced into the second hopper 16. . Batch B and cullet C are formulated to match the composition of the glass or glass element to be produced. The inner cylinder 4 is rotationally driven by the motor M, and when the opening 20 of the inner cylinder 4 is aligned vertically with the outlet 18 of the second hopper 16, the valve 22 is opened by the control device.

  By such an operation, the batch B is supplied to the first conveyance path formed in the space between the inner peripheral surface of the outer cylinder 2 and the outer peripheral surface of the inner cylinder 4. And the batch B supplied to the 1st conveyance path is conveyed in the 1st conveyance path to the front-end | tip direction by the external screw 6 rotated integrally with the inner cylinder 4, and the inside of the melting furnace F from the front-end | tip of the inner cylinder 4 is carried out. To be supplied.

  Further, the cullet C is intermittently supplied to the second transport path inside the inner cylinder 4. Then, the cullet C supplied to the second conveyance path is conveyed in the distal direction in the second conveyance path by the internal screw 10 that rotates integrally with the inner cylinder 4, and enters the melting furnace F from the distal end of the inner cylinder 1. To be supplied.

  According to such a configuration, since the first conveyance path for conveying the batch B and the second conveyance path for conveying the cullet C are provided separately, the batch B and the cullet C having greatly different diameters are provided. Can be conveyed individually and supplied smoothly.

  In addition, since a plurality of types of glass raw materials are supplied to the melting furnace F from a single supply port (tips of the outer cylinder 2 and the inner cylinder 4), problems such as deposition of compounds vaporized in the melting furnace F are likely to occur. Since the area and the number of the parts are minimized, the occurrence of these problems is suppressed.

  Here, when a glass raw material of fluorophosphate glass is supplied into a melting furnace using a plurality of supply devices and glass is produced, the fluorine compound volatilized in the melting furnace and phosphorus, aluminum, or oxygen are contained. The compound to be formed forms a reaction product and is likely to be deposited on a relatively low temperature part such as a connection part between the supply device and the melting furnace. This deposit may peel off and fall into the melting furnace and be mixed into the molten glass. In general, since the melting temperature of fluorophosphate glass is lower than that of other glasses, this deposit cannot be completely melted in a melting furnace, and there is a problem that the yield of glass or glass elements is lowered.

Furthermore, a highly volatile fluorine compound (F ₂ ) flows from the fluorophosphate glass material conveyed from one supply device into another supply device, and the internal parts of this supply device are corroded. There was also a problem.

  Even in such a case, in the configuration of the embodiment, since there is only one supply device, the area and the number of portions where precipitation, deposition, or corrosion problems may occur are minimized. Thus, since the structure of one Embodiment can suppress generation | occurrence | production of the problem of deposition or corrosion, it is preferably used in order to supply a fluorophosphate glass material.

  Further, since the glass raw material flows down from the entire front end surface of the supply device, a “curtain” made of the glass raw material is formed on the front end surface, and the inflow of the compound into the supply device is suppressed. In order to block the inflow of the fluorine compound more efficiently, the batch B is transported to the first transport path in the space between the inner peripheral surface of the outer cylinder of the glass raw material supply device and the outer peripheral surface of the inner cylinder. It is preferable to do this. This is because the density of the “curtain” is increased when the batch B is used, and the blocking property of the fluorine compound is improved as compared with the case where the cullet C is used.

  Moreover, in one Embodiment, although the supply apparatus 1 is connected to the side surface of the melting furnace F, it connects the supply apparatus 1 to the side wall arrange | positioned at the top part of melting furnace F 'like the modification of FIG. The configuration may be also possible.

  Note that, in any of the embodiment and the modification, the supply device 1 may be connected in a state where the longitudinal axis thereof is inclined with respect to the side wall of the melting furnace F.

In the supply device 1 of one embodiment, the first hopper 14 and the second hopper 16 are arranged in series along the outer cylinder 2. However, as shown in FIG. 5, a double-structure hopper in which a second hopper 16 ′ is arranged inside the first hopper 14 ′ may be used.
In this configuration, the outlet 18 ′ disposed on the inner side and below the second hopper 16 ′ is disposed at a position that can be aligned with the opening 20 of the inner cylinder 4 in the vertical direction.

  Furthermore, in the above embodiment, the supply device 1 is arranged so that the longitudinal axis extends in the horizontal direction. However, as shown in FIG. 6, the supply device 1 extends in the vertical direction. In this way, it may be arranged vertically.

In such a configuration, in order to prevent the glass glass falling from the supply device 1 from “bounce” of the molten glass G, the inclined surface Fa is provided on the side of the melting furnace F ″, and the glass raw material falling from the supply device 1 First, it is preferable to have a configuration that collides with the inclined portion Fa.
However, as shown in FIG. 7, the supply device 1 may be arranged vertically with respect to the melting furnace F ′ similar to FIG. 4 that does not include the inclined surface.

  Further, such a vertical configuration supplies the cullet C from the first hopper 14 "to the space between the outer cylinder 2 and the inner cylinder 4 and faces the outlet of the second hopper 16" at a constant cycle. The batch B is configured to be supplied into the inner cylinder 4 from the opening 20 of the cylinder 4.

  In such a vertical configuration, since the glass raw material is conveyed in the direction of gravity, the load on the motor that rotationally drives the inner cylinder is reduced.

  Further, as shown in FIG. 8, the second hopper may not be provided, and the cullet C (second glass raw material) may be directly supplied to the rear end of the inner cylinder 4 as indicated by an arrow. In such a configuration, the motor M that drives the inner cylinder 4 is preferably provided at a radially outward position of the rear end portion of the inner cylinder 4.

  Without being limited to the above-described embodiment of the present invention, various changes and modifications can be made within the scope of the technical idea described in the claims.

The present invention will be summarized below with reference to the drawings.
As shown in FIG. 1, the present invention is a glass raw material supply device 1, which is a cylindrical outer cylinder 2, a cylindrical inner cylinder 4 concentrically arranged in the outer cylinder, and an inner cylinder A spiral external screw 6 disposed in a space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder, and a spiral inner screw 10 in the same direction as the external screw disposed in the inner cylinder; A drive mechanism (motor M) is provided that rotates at least one of the inner cylinder 4 and the outer cylinder 2 about the central axis thereof so that the external screw 6 and the internal screw 10 rotate.

  Moreover, it arrange | positions in the space between the cylindrical outer cylinder 2, the small diameter cylindrical inner cylinder 4 arrange | positioned concentrically in an outer cylinder, and the outer peripheral surface of an outer cylinder, and the outer peripheral surface of an inner cylinder. The glass raw material C and the supply apparatus 1 of FIG. 1 provided with the helical external screw 6 and the helical internal screw 10 of the same direction as the external screw 6 arrange | positioned inside the inner cylinder are used. A method for supplying glass raw material, in which at least one of the inner cylinder 4 and the outer cylinder 2 is rotated around its central axis so that the external screw 6 and the internal screw 10 rotate, Supplying and transporting the first glass raw material to the first transport path in the space between the inner peripheral surface and the outer peripheral surface of the inner cylinder; and the second transport path in the space inside the inner cylinder Supplying and conveying the second glass raw material to the first and second ends of the first and second conveying paths, And a step of discharging the second glass material at the same time, the.

1: Feeder 2: Outer cylinder 4: Inner cylinder 6: External screw 8: Blade-like elongated member 8a: One side (of the blade-like elongated member) 8b: The other end (of the blade-like elongated member) 10: Inside Screw 12: Blade-like elongated member 12a: One side 12b (of the blade-like elongated member): The other end 14 (of the blade-like elongated member) 14: First hopper 16: Second hopper 18: (Second Hopper) outlet 20: opening 22: valve

Claims (9)

A glass raw material supply device,
A cylindrical outer cylinder;
A cylindrical inner cylinder disposed concentrically in the outer cylinder;
A spiral external screw disposed in a space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder;
A spiral internal screw in the same direction as the external screw disposed inside the inner cylinder;
A glass raw material supply apparatus comprising: a drive mechanism that rotates at least one of the inner cylinder and the outer cylinder around a central axis thereof so that the external screw and the internal screw rotate. A first hopper communicating with a space between the outer cylinder and the inner cylinder;
A second hopper capable of communicating with the internal space of the inner cylinder,
The glass raw material supply apparatus according to claim 1. The distal end of the inner cylinder and the distal end of the outer cylinder terminate at substantially the same longitudinal position,
The glass raw material supply apparatus according to claim 1 or 2. An opening provided in the inner cylinder at a position aligned with the outlet of the second hopper in the longitudinal direction;
An opening and closing mechanism for opening and closing the outlet of the second hopper;
A control device for controlling opening and closing of the opening and closing mechanism,
The glass raw material supply apparatus according to claim 2. The space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder is a first conveyance path for conveying a powdery glass raw material,
The internal space of the inner cylinder is a second conveyance path for conveying the massive glass raw material,
The glass raw material supply apparatus according to any one of claims 1 to 4. The glass raw material supply device according to any one of claims 1 to 4,
A glass raw material melting furnace disposed on the downstream side of the glass raw material supply device,
Glass raw material manufacturing equipment. A cylindrical outer cylinder;
A cylindrical inner cylinder disposed concentrically in the outer cylinder;
A spiral external screw disposed in a space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder;
A glass raw material supply method using a glass raw material supply device comprising a spiral internal screw in the same direction as the external screw disposed inside the inner cylinder,
A step of rotationally driving at least one of the inner cylinder and the outer cylinder around its central axis so that the external screw and the internal screw rotate;
Supplying and conveying the first glass raw material to the first conveyance path in the space between the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder;
Supplying and transporting the second glass raw material to the second transport path in the space inside the inner cylinder;
And simultaneously discharging the first and second glass raw materials from the end of the first and second transport paths,
Glass raw material supply method. A cylindrical outer cylinder;
A cylindrical inner cylinder disposed concentrically in the outer cylinder;
A spiral external screw disposed in a space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder;
A glass manufacturing method using a glass raw material supply device comprising a spiral internal screw in the same direction as the external screw disposed inside the inner cylinder,
A step of rotationally driving at least one of the inner cylinder and the outer cylinder around its central axis so that the external screw and the internal screw rotate;
Supplying and conveying the first glass raw material to the first conveyance path in the space between the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder;
Supplying and transporting the second glass raw material to the second transport path in the space inside the inner cylinder;
Supplying the first and second glass raw materials simultaneously to the melting furnace from the end of the first and second transport paths,
Glass manufacturing method.   The manufacturing method of the glass element which manufactures glass by the manufacturing method of the glass of Claim 8, and manufactures a glass element using the said glass.

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