JP2002167245A - Method of fabricating glass panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of fabricating a glass panel capable of filling a metallic material surely into a gap and keeping airtightness of the gap properly. SOLUTION: This method of fabricating a glass panel comprises using a metal filling tool D comprising an outlet 9 through which molten metallic material 5 is dischargeable toward the gap V between a pair of sheet glasses 1A and 1B and an introduction piece 7 which can introduce the molten metallic material 5 from the outlet 9 through the gap V, and filling the molten metallic material 5 into the peripheral gap between both sheet glasses 1A and 1B, where the sheet glasses 1A and 1B and the metal filling tool D are disposed so that the distance W between the outlet 9 and the sheet glasses 1 becomes shorter than 10 times of gap size H between both sheet glasses, and the metallic material 5 is filled into the gap V as the metal filling tool D and the sheet glasses 1 are moved relatively along the outer periphery of the sheet glasses 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for arranging a pair of glass sheets facing each other up and down with a gap therebetween, and filling and joining a molten metal material between peripheral edges of the glass sheets.
The present invention relates to a method for manufacturing a glass panel for hermetically sealing the gap.

[0002]

2. Description of the Related Art As shown in FIG. 7, a glass panel of this type has a pair of plate glasses 1A and 1B arranged vertically opposite to each other with a gap V therebetween, and a pair of plate glasses 1A and 1B is provided between the peripheral portions of the plate glasses 1A and 1B. A metal solder (corresponding to a metal material) 10 is filled in a molten state and the metal solder 10 is solidified to directly join the two glass sheets 1A and 1B to form an airtight glass panel (for example, International Publication WO00 / 00). 58234
Reference). And the filling of the metal solder 10 is as follows.
As shown in the figure, a storage container 11 capable of storing the molten metal solder 10 in a warmed state is provided, and a discharge port 11a capable of discharging the molten metal solder 10 sideways is formed below the storage container 11, An insertion plate (corresponding to an introduction member) 11b which can be inserted into the gap V while being inserted into the gap V between the two glass sheets 1A and 1B and along the molten metal solder 10 from the storage container 11 to the discharge port 11a. This is carried out using a metal filler 12 provided so that the tip protrudes therethrough. Specifically, as shown in FIG.
b so that the tip of b is located within the gap V
2 and the molten metal solder 10 in the storage container 11 is sent out from an outlet 11a. The molten metal solder 10 enters the gap V along the introduction plate 11b and is filled. By performing the filling of the molten metal solder 10 over the entire circumference while moving the filler 12 along the sides of the two glass sheets 1A and 1B, the two glass sheets 1A and 1B are joined and sealed. It is. Conventionally, in the production of this type of glass panel, the separation distance between the metal filler 12 and the plate glass 1 has been performed without any particular definition. However, if the discharge port 11a contacts the end face of the glass sheet 1, the metal filler 12 may be rubbed against the glass sheet 1 when the metal filler 12 is moved along the side of the glass sheet 1. Needed to be spaced.

[0003]

According to the above-described conventional method for manufacturing a glass panel, when the distance between the metal filler and the end face of the glass sheet becomes large, the ratio of the molten metal solder leaking without reaching the glass gap is reduced. If the gap size is set to be as small as 0.2 mm, for example,
There was a problem that defects were conspicuous in the filling state of the metal solder, the airtightness of the glass panel was low, and the glass panel was apt to vary.

Accordingly, it is an object of the present invention to provide a method of manufacturing a glass panel which can solve the above-mentioned problems, can surely fill a gap with a metal material, and can easily secure the airtightness of the gap appropriately. .

[0005]

As shown in FIG. 4, a characteristic means of the present invention is a pair of glass sheets 1A and 1A.
B is disposed between the upper and lower surfaces of the glass sheets 1A and 1B while the metal material 5 is disposed between the upper and lower surfaces of the glass sheets 1A and 1B.
In the glass panel manufacturing method of filling and joining together and hermetically sealing the gap V, the molten metal material 5
And an introduction member 7 capable of introducing the molten metal material 5 from the discharge port 9 to the gap V along the outer periphery of the member.
When filling the molten metal material 5 between the peripheral edges of the two glass sheets 1A and 1B using a metal filler D having the following, a separation distance W between the discharge port 9 and the glass sheet 1 However, the two glass sheets 1A, 1B and the metal filler D are arranged so as to be 10 times or less the gap dimension H between the glass sheets 1A, 1B, and the metal filler D is formed along the outer periphery of the glass sheet 1. The gap material V is to be filled with the metal material 5 while relatively moving D and the plate glass 1.

According to the characterizing feature of the first aspect of the present invention, the molten metal material is filled between the peripheral edges of the two glass sheets by using a metal filler having the discharge port and the introduction member. In doing so, the two glass sheets and the metal filler are arranged so that the separation distance between the discharge port and the glass sheet is 10 times or less the gap size between the glass sheets, and along the outer periphery of the glass sheet. By filling the gap with the metal material while relatively moving the metal filler and the plate glass, it is possible to manufacture a glass panel having good airtightness. In other words, when the gap between the two glass sheets is small, the metal filler and the glass sheet are difficult to enter the gap due to the flow resistance, surface tension, and oxide film generated on the surface of the molten metal material. By placing them close to each other, the exposed area of the introduction member is also reduced, so that the gap can be filled with the molten metal material with less loss while suppressing the spread of the molten metal material to an unexpected range. Becomes Therefore, as in the conventional case, it is possible to reduce the loss that the molten metal material spreads in an unplanned range, reduce the material cost, and achieve good joining by appropriately filling the gap with the molten metal material. Performance can be maintained. As a result, the gap can be filled with the metal material in a favorable state, and the airtightness of the gap can be appropriately secured. By the way, an appropriate value could be obtained by an experiment with respect to a relation value between a separation distance between the discharge port and the sheet glass and a gap size between both sheet glasses.

[0007] As described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

FIGS. 1 and 2 show a glass panel P formed by the glass panel manufacturing method of the present invention. The glass panel P is formed between a pair of glass sheets 1 at intervals along the plate surface. With the spacer 2 of
An outer peripheral sealing portion 4 made of metal is provided between the outer peripheral portions of the two glass sheets 1A and 1B, and a gap V between the two glass sheets 1 is reduced and hermetically sealed in one of the pair of glass sheets 1B. With respect to the glass panel body P1 provided with the suction unit 3, the gap V
It is formed tightly with the air inside sucked.

One of the pair of glass sheets 1 and the other glass sheet 1B are both float glass sheets (thickness is, for example, 2.65 mm to 3.2 m).
m), and are integrated so that the edges overlap each other.

The spacer 2 has a compressive strength of 490MP.
a (5000 kg / cm ² ) or more is preferable, and in this embodiment, each is formed of Inconel 718. If the strength is low, there is a risk that the spacer 2 is broken due to the atmospheric pressure acting on the glass sheet 1 and the gap V cannot be formed, and both glass sheets directly contact each other, and the heat insulating performance of the glass panel itself decreases. Or the sheet glass is broken. Further, the shape of the spacer 2 is formed in a cylindrical shape, and the shape and the dimension are 0.3 mm in diameter.
The height dimension is set to 0.2 mm. And, since the spacer 2 is formed in a columnar shape, it is difficult to form a corner portion in a contact portion with respect to both the glass sheets 1, and provides a gentle support for the glass sheet 1,
It can be hard to destroy. On the other hand, each spacer 2
They are installed vertically and horizontally along the plate surface direction at intervals of 20 mm. Therefore, when the spacer 2 is disposed between the two glass sheets, the two glass sheets 1A and 1B have a gap dimension H =
It is set to 0.2 mm.

The outer peripheral seal portion 4 is further joined by joining and melting a solder (corresponding to a metal material 5) 5A integrally between the peripheral edges of the two glass sheets 1A and 1B. Is sealed. Then, the gap V is, for example, depressurized environment (0.13 Pa (1.0 × 10 ⁻³⁾ by the decompression operation from the suction part ^3.
(Torr) or less).

The solder 5A is made of Sn.Zn.Ti.O.
And so on. In the present embodiment,
For example, 0.001-3.0% Ti, 72-99.9
% Of Sn and 0.1 to 10.0% of Zn, and
Examples include those in which Pb is less than 0.1% and are not substantially contained. In addition to the above components, In, Ag, B
i and Sb can be appropriately added. In has an effect of not only lowering the melting point of the solder, but also improving the wettability and softening the solder itself. I
If the amount of n is less than 0.1%, the effect is low, and if it exceeds 50%, it becomes difficult to secure the strength of the solder itself, and the cost becomes considerably high. Ag exerts an excellent effect of improving the mechanical strength of the solder when added, similarly to Cu described above. 0.1% Ag added
If it is less than 10%, the effect is low, and improvement in mechanical strength cannot be obtained. If it exceeds 6%, the melting point becomes high similarly to Cu, and a large amount of intermetallic compounds with Sn are generated, and the mechanical strength is reduced conversely. Is a problem. A more preferable range of the addition amount is 0.1 to 3.5%. One or more elements of Bi and Sb can be appropriately added in a range of 10% or less. Bi can improve the wettability of the solder. Sb improves the brazing appearance and increases the creep resistance. In addition, other Fe, Ni, Co, Ga
Even if a small amount of an element such as Ge or P is added, the solder properties, that is, lead-free, solderability and mechanical strength can be improved.

The solder 5A is filled in the gap between the two glass sheets with a metal filler D (hereinafter simply referred to as a filler) D shown in FIGS. The filling tool D is provided with a supply tower 6 movably formed along the side of the glass panel main body P1 installed on the glass panel forming base B, and protrudingly installed from the lower end side of the supply tower 6 to the side. A flat introduction plate (introduction member) 7 which is very thin (0.1 mm) long in the horizontal direction is provided above and below. The supply tower 6 includes a crucible portion 6a for storing molten solder (including unmelted ones) 5A, an electric heater 6b for heating and keeping the crucible portion 6a free, and a bottom portion of the crucible portion 6a and an introduction plate 7. It is configured to have an introduction path 6c and the like connecting the support portion,
It is movably installed on a rail 8 provided on the glass panel forming base B. The introduction plate 7 is connected to the introduction path 6.
c, which is located at the center of the opening 9 (corresponding to the discharge port). The molten solder 5A in the crucible portion 6a and the introduction path 6c is positioned between the upper and lower surfaces of the introduction plate 7 between the two glass plates. Is introduced into the gap. Then, the introduction plate 7 is inserted into the gap V between the both glass sheets 1, and the molten solder 5A is inserted.
The supply tower 6 is moved on the rail 8 along the peripheral edge of the glass panel main body P1 while supplying the glass sheet P1, so that the entire length of both sides of the glass sheets 1 can be directly joined with the solder 5A. Incidentally, the glass panel forming base B is formed such that a separation distance W between the placed glass sheet 1 and the filling tool D can be adjusted. In this embodiment, the end surface of the glass sheet 1 and the filling tool D is 2 m from the opening 9
m. Therefore, the filling tool D is
The solder 5A can be filled while moving along the side of the plate glass with the above-described separation distance W of 2 mm secured. It has been confirmed that it is preferable to set the separation distance W to a value not more than 10 times the gap dimension H between the two glass sheets 1 in terms of maintaining the bonding property and airtightness.

The suction unit 3 will be described. As shown in FIGS. 1 and 2, the suction unit 3 is provided with the upper plate glass 1.
B, a suction glass thin tube 1b fixed to the suction port 1a, and a cap 1c for covering the suction hole 1a and the glass thin tube 1b from above. Then, in a state where the gas in the gap V is sucked from the glass thin tube 1b, the tip of the glass thin tube 1b is heated and sealed, and then the cap 1 is placed from above.
The suction unit is formed by attaching c.

Next, a method of forming the glass panel P will be described. [1] The pair of plate glasses 1 are cut in advance to predetermined dimensions. [2] The one glass sheet 1A is first placed on the glass panel forming base B, then the spacer 2 is placed at a predetermined position, and then the other glass sheet 1B is arranged so as to overlap (FIG. 3). reference). Then, the glass sheet 1 is set so that the separation distance W is a positive value equal to or less than 10 times the gap dimension H. [3] The introduction plate 7 of the filling tool D is inserted into the gap V between the two glass sheets 1, and the solder 5A in the molten state through the crucible portion 6a and the introduction path 6c is supplied to the gap V. Then, the entire filling tool D is moved at a constant speed along the side of the glass panel main body P1 to fill the solder 5A over the entire length, and the both glass sheets 1 are joined. [4] Hereinafter, by performing the step [3] on each side of the glass panel main body P1, the outer peripheral seal portion 4 can be formed over the entire circumference. [5] Then, by using the suction unit 3 to reduce the pressure in the gap V between the two glass sheets 1, a glass panel P having high heat insulation performance can be formed.

In the glass panel P thus formed, the solder 5A is reliably filled in the outer peripheries of the two glass sheets 1 and the two glass sheets 1 are strongly joined and integrated. Incidentally, the setting of the separation distance W between the two glass sheets 1 and the filling tool D is determined based on the quality of the performance of the outer peripheral seal portion 4 in an experiment described below.

[Embodiment] The experiment was conducted on the upper and lower plate glasses 1A.
For each glass panel P in which the outer peripheral seal portion 4 is formed by changing the gap dimension H of 1B and the separation distance W,
The time change of the degree of pressure reduction in the gap V was measured. However, in the determination of the sample, a sample which did not change after 28 days was regarded as good, and other than that, a sample in which the degree of decompression changed was determined to be unacceptable. In the experiment, the gap size H and the separation distance W were changed, and FIG.
As shown in FIG. As a result of this experiment, as shown in FIG. 6, the glass panel sealed by the separation distance W exceeding 10 times the gap dimension H has a problem in the sealing property, and the glass panel is not more than 10 times. The glass panel sealed by the separation distance W indicates that the sealing effect of the outer peripheral sealing portion 4 is good.

[Another Embodiment] Another embodiment will be described below.

<1> The glass panel of the present invention can be used for a wide variety of applications.
For vehicles (car window glass, railway vehicle window glass, ship window glass) and equipment elements (plasma display surface glass, refrigerator doors and walls, heat insulation doors and walls), etc. It can be used. Further, in the glass panel, the pressure reduction environment in the gap between the two glass plates is set to 0.13 Pa (1.0 × 10 ⁻³ To
rr) The degree of decompression itself can be set arbitrarily, without being limited to the state in which the following conditions are exhibited. Further, it is also possible to set the environment at an atmospheric pressure and an equal pressure. <2> The sheet glass is not limited to the sheet glass having a thickness of 2.65 mm to 3.2 mm described in the above embodiment, and may be a sheet glass having another thickness. Further, a glass panel may be configured by combining one plate glass and the other plate glass having different thickness dimensions. In addition, the type of glass can be arbitrarily selected,
For example, template glass, ground glass (glass having a function of diffusing light by surface treatment), meshed glass, or tempered glass, and plate glass having functions of absorbing heat rays, absorbing ultraviolet rays, reflecting heat rays, and the like. It may be a combination. The composition of the glass may be soda silicate glass (soda lime silica glass), borosilicate glass, aluminosilicate glass, or various crystallized glasses. <3> The spacer is not limited to the spacer made of Inconel 718 described in the above embodiment. For example, stainless steel, other metals, quartz glass, ceramics, glass, and low melting point glass may be used. In other words, any material may be used as long as it is not easily deformed so that the two glass sheets do not come into contact with each other under an external force. <4> The outer peripheral seal portion 4 is not limited to the one formed using the solder 5A described in the above embodiment, and may be, for example, any one of tin, bismuth, lead, zinc, indium, antimony, or the like, or It may be formed using a metal material containing two or more kinds as main components. Further, any one kind of silver, aluminum, copper, or the like, or two or more kinds may be added.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a glass panel.

FIG. 2 is a cross-sectional view showing a glass panel.

FIG. 3 is an exploded perspective view showing a glass panel forming method.

FIG. 4 is an explanatory sectional view showing a method of forming a glass panel.

FIG. 5 is an explanatory plan view showing a method of forming a glass panel.

FIG. 6 is a list showing experimental results.

FIG. 7 is a cross-sectional view of a main part showing a conventional glass panel formation state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet glass 1A One sheet glass 1B The other sheet glass 5 Metal material 7 Introducing member 9 Discharge port D Metal filler H Gap size V Gap part W Separation distance

Claims (1)

[Claims] 1. A glass for arranging a pair of glass sheets facing each other up and down via a gap, filling and joining a molten metal material between peripheral edges of the both glass sheets, and sealing the gap in an airtight manner. A panel manufacturing method, comprising: a discharge port capable of discharging the molten metal material toward the gap, and an outer peripheral portion of the member, wherein the molten metal material extends from the discharge port to the gap. Using a metal filler having an introducing member capable of being introduced, in filling the molten metal material between the peripheral portions of the two glass sheets, the discharge port, the separation distance between the glass sheet, The two glass sheets and the metal filler are arranged so as to be 10 times or less the gap size between the two glass sheets, and the metal filler and the glass sheet are relatively moved along the outer periphery of the glass sheet while the metal filler is relatively moved. Money Glass panel manufacturing method of filling material into the gap.