JPS58130125A - Formation of glass plate - Google Patents

Abstract

PURPOSE:To obtain glass plate moldings of intricate shapes with good productivity by bending a glass plate shapely along the curved line parts thereof, butting the end parts where notched parts face each other to each other, and melt sticking and joining parts to each other by heating. CONSTITUTION:Notched parts B are provided in the corner parts of a glass plate 1 and are cut in such a way that such shapes as parts A where the 3 or 4 sides of a glass plate molding are bent shaprly. The plate 1 cut to prescribed sizes and shapes is put into a heating furnace and is heated. Thereafter, the desired curved line S, S1, S2 parts of the plate 1 are heated locally to the softening point temp. or above of the glass plate and are bent sharply to butt the end parts C, D of the glass plate where the notched parts B in the upper part face each other are butted to each other, whereby a preliminarly glass plate molding for the purpose of obtaining the glass plate molding is manufactured. The parts where the end parts C, D of the preliminarly glass molding are butted are heated locally to the softening point temp. or above of the glass plate and the butted end parts C, D of the glass plate are joined to each other by melt sticking, whereby the final shape is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a glass plate molded article having a shape in which eight or four sides are sharply curved from a glass plate.

Widely used methods for forming glass plates include heating the glass plate to a temperature higher than its softening point, then press bending, rolling under its own weight, or bending. It is very difficult to form a complex shape such as a box shape, where the four sides are sharply curved.
Glass plate moldings with the above-mentioned complex shapes are now required for showcases, furniture, and various other applications.
This book summarizes glass plate forming methods that can provide such complex-shaped glass plate moldings with high productivity.

The present invention was invented in response to such demands.
The gist of point 7 is to cut the notch at the corner S of the glass plate so that the desired shape can be obtained by bending it along the desired bend 111.
A glass plate is cut into a shape that has a shape of 1, and the cut glass plate is heated.In step 4, the bent line portion of the glass plate is locally heated to a temperature higher than the softening point temperature of the glass plate to disturb the bent line. The edges of the glass plates facing each other with the notches tks are brought together by sharply bending them, and then the skins of the joined glass plates are locally heated to a temperature higher than the softening point temperature of the glass plates. This invention relates to a method of forming a glass plate by welding and joining the ends of nine glass plates together and forming the glass into a predetermined final shape.

Hereinafter, the present invention will be described in more detail regarding w5L with reference to the drawings.

In the present invention, first, a predetermined shape of a predetermined glass plate molded body is formed, for example, a first shape. ! l,\ Cut into the unpleasant shape shown in Figures 7 and 9. In other words, a notch is formed in a part of the corner of the glass plate L to obtain a shape similar to that of a glass plate formed body having sharply curved parts on 8 or 4 sides as shown in FIGS. Set B and cut 8! Bend it sharply and cut the notch I.
The ends C and D of the opposing glass plates of B can be brought into contact with each other, thereby allowing @2, 4, 6. A corner part as shown in Figure 10 can be obtained. This notch B is
Depending on the shape and dimensions of the corner part to be obtained, cut
Select the radius dimension and cutout shape appropriately.

The glass plate 1 cut into a predetermined size and shape is placed in a heating furnace and heated in order to be curved.

Next, the desired bending line ' + SI + of the glass plate 1
``One part is locally heated to a temperature above the softening point of the glass plate, e.g. 700°C to 750°C, and then sharply bent), and the ends C and D of the glass plate facing each other in the upper notch e part B are pressed together. In addition, a rounded preliminary glass plate molded body is produced to obtain a glass plate molded body with a diameter of λa, s, a, X) i!Q.

Next, the end C of the glass plate of this preliminary glass plate molded body,
The area where D is butted is locally heated to a temperature higher than the softening point of the glass plate, especially the edges of the glass plate are sufficiently softened and the edges are connected to each other.
*Temperature at which it can be worn, i.e. 750℃~1000℃
The edge C of the glass plate is heated to ℃ to soften it and butt it together.
, D are welded and joined together to obtain a predetermined final shape.

In the present invention, before or after bending the glass plate 1 over a predetermined bending line, or during the bending, the glass plate 1 may be further bent into the desired shape of the rib 1, if necessary. can. For example, by placing a glass plate tube on a bending stand under its own weight,
The glass plate is heated to around the softening point temperature of the glass plate in a heating furnace, then bent into a curve by its own weight. A method is adopted in which a part of the part is heated above the softening point temperature, and then it drips and bends due to its own weight, while the other part is bent by itself. .

The bending line for sharply bending the glass plate may be straight or curved. Control is performed so that the ends C and D of the glass plate are butted against each other. Further, the bending portion of the glass plate is appropriately selected within a range where the abutting portion of the end of the glass plate @CID can be joined.

The number of tables may be uniform over the entire folding section, or may be increased or decreased.

When the glass plate 1 is bent sharply and the opposite ends C and D of the glass plate in the notch B are brought into contact with each other, a portion of the ends C and D is cut over the entire length or at least part of the cutout B. They may be brought into contact with each other, or they may be placed close to each other with a slight distance between them as long as it is possible to weld them together. An end surface portion, a corner portion of an end portion, or another portion of the glass plate is appropriately selected so as to facilitate bonding (by attaching the bonded portion #′iS). In addition, the edge lines of the glass plates to be matched are made by welding to make it easier to join and to improve the finish. It is also possible to lack p.

When welding and joining the edges of the abutted glass plates by locally heating the ends of the glass plates described above, prevent the preliminary glass plate molded body from cracking due to heat cracking due to local heating. Alternatively, the entire or essential part of the preliminary glass sheet molded body can be heated in advance.

In the present invention, the following method is exemplified as a method for sharply folding a glass plate.

One method is to print a conductive frit paste along the bending line Ka where the glass plate is bent, and then heat the print A by passing an electric current through it. To show a concrete example of this method, first, a heater print line for folding is provided on a piece of glass plate to be folded Ffal. This heater printed wire can heat 1 ft of glass to above its softening point temperature by heating with electricity.
and the glass plate is in close contact with the glass plate.
The lif+ can be heated uniformly, and the material that conforms to the bending lines of the glass plate and does not cause wrinkles or decrease in strength, such as conductive frit paste, is printed on the wrapper. is used. This conductive frit paste includes Ag, ml, Pd, Pt.
, conductive metal powder such as MuU, or carbon powder,
Alternatively, a paste obtained by t-mixing a conductive metal oxide powder such as Rub, a low melting point glass frit, an organic solvent, a thickener, and other desired additive components is used. Among them, silver frit paste is the most practical. This conductive frit paste is applied to the desired sharp bending line of the glass plate, and has a line width such as 1m to 10all width that allows the desired bending curvature to be obtained by a printing method such as screen printing. Fritted into filaments, then pre-dried or pre-fired and folded.
The song is formed by -fak on the heater pre-7.

In this way, the glass plate 4 provided with the heater print wire for repeated bending was put into a gravity bending machine*tL, and then put into a heating furnace.
The entire glass plate is heated to a temperature above the strain point or near the softening point of the glass, for example 460°C or more in the case of a normal soda lime glass plate.
Heat to about 600℃. When the glass plate reaches this temperature, the heater print wire for bending is energized to generate heat in the mosquito print m', and the bending line part of the glass plate that is swung by the heater print wire is locally heated to 650℃ or more. It is softened by gravity, and then bent by gravity using the moment of a counterweight attached to the bending part of the gravity bending arm.
iii.

Another method for sharply bending a glass plate is to arrange a heater lIl along the bending line of the glass plate and heat the heater wire. A typical example of this method will be specifically shown.

First, contact the glass plate surface at the desired bending point of the glass plate, or 1av+ from the glass plate -.
Ribbon-like or filamentous heater edges are placed under tension at intervals of -20 sagQ degrees. This heater wire is made of a conductive material that generates heat at a temperature of 660°C or higher and is stable above this temperature, such as tantalum, molybdenum, platinum, tantalum alloy, molybdenum alloy, platinum alloy, nickel-chromium alloy, stainless steel. Ribbon-shaped, *-shaped, rod-shaped, spiral-shaped materials made of steel or the like, or nine types in which a wire or ribbon-like material is wound around a core material are used. The glass plate is placed on a bending mold for gravity bending, the above-mentioned heater is arranged, and the glass plate is placed in a heating furnace to heat the entire glass plate at a temperature above its strain point or near its softening point, for example, in the case of a soda lime glass plate. , heat to about 460C to 660C. When the glass plate reaches this temperature, power is supplied to the heater wire, and the heater wire is electrically heated to a temperature of 650°C or higher, preferably 800°C or higher, and the heater wire touches or closes the curved part of the glass plate. The glass plate is locally heated to a temperature above the softening point of the glass plate, for example 1J65G°C or above, to soften it, and then the glass plate is bent by gravity using the moment of the calanterfeit attached to the bending part of the gravity bending type. -One tooth is sharply bent. In this method, the heater #1 IK is placed close to the bending line of the glass plate at a distance from the bending line, and the round side prevents the edge of the heater from coming into contact with the bending line of the glass plate. It has the advantage of not leaving any traces.

Also, one method is to bend the glass plate sharply.
The glass plate rots on the curved line where the glass plate tries to fold sharply! Conductivity 1115J to trigger current to 1IIJs! ! A trigger is formed, a current is passed through this conductive trigger to cause the conductive wire trigger to generate heat, and this heat and the heat generated by burning the conductive wire trigger make a bent part of the glass plate conductive. Allow current to flow inside the glass plate, thereby bending the glass plate.
An example of a method is to heat the noodles by t joule heating to a temperature equal to or higher than the softening point of the glass plate, and then bend the noodles sharply along the bending lines eC. In this method, a conductive brass trigger is first formed at the desired bend in the glass sheet. The trigger for this is to heat the glass plate to a temperature at which it forms an electric path and becomes conductive at the initial stage of energization. Materials that would be burnt out if the temperature reaches 1, such as electrically conductive carbon paste or carbon paint, are used. The glass plate provided with the conductive trigger in this manner is placed on the gravity bending crease, placed in a heating furnace, and the entire glass plate is heated to 250° C. to 600° C. in the case of a soda lime glass plate.

When the temperature of the glass plate reaches 260°C or higher, a current, for example, a high frequency current, is passed through the conductive trigger to heat the trigger, heating a bent part of the glass plate to a temperature at which it becomes conductive, and making it conductive. At the same time as burning out the trigger, the current is passed through the bending part of the glass plate, and the shoulder bend part of the glass plate is heated to a temperature above the softening point to soften it, and the bending plate for gravity is sold at a price of 111WK. Using the moment of the counterweight, the glass plate is bent sharply along its bending line.

In the above example, we will explain an example in which the gravity bending method is applied as a method for sharply bending a glass plate. Of course, each of the virtue bending methods can be used as well.

In addition, in the present invention, as a method of joining by locally heating the ends of nine glass plates that have been butted together and bathing the skin parts of the butted glass plates, there is a method of joining the two butted glass plates by applying heat to the edges of the two glass plates. A conductive wire trigger is formed on at least one of the ends of the glass plate, and a current is applied to the conductive #1 trigger, and the end of the glass plate is stimulated by the heat generated by the conductive string trigger. The ends of the glass sheets are heated to make them conductive and a supercurrent is passed through the ends of the glass sheets, thereby heating the ends of the glass sheets to a temperature above the softening point of the glass sheets, so that the ends of the nine glass sheets are butted together. There is also a method of joining them by bath-bonding them, and a set of nine glass plates whose notched portions are butted together. A method of joining the ends of glass plates by tS bonding them together, a method of heating the ends of the abutted glass plates with a gas burner and welding them, and a method of joining the ends of the abutted glass plates by welding them together. Examples include a method of heating the ends of the glasses and welding them together by placing them in contact with each other or in close proximity to each other, but the first method is the most preferred.

Next, Rin 1 describes a method of welding and joining the ends of abutted glass plates using a conductive wire trigger.
1.Explain with reference to 12 mills.

When joining using this method, first
A conductive wire 4 and a filament trigger 18 are formed at the portions to be joined of the opposing ends @c, i) of the notch mB of No. 1. This conductivity! l+! The strip triggers 18 may be formed on both of the opposing ends of the glass plate 11, or may be formed only on one side.

This conductive wire trigger 18 serves to heat the glass plate 11t, which is non-conductive at room temperature, to a high temperature at which it becomes conductive when energized. to form continuous filaments. In addition, when using a high frequency current as the current to be applied, it is also possible to form a single line with a discontinuous lift through which the current flows. Preferably, the conductive wire trigger 18 is provided in the square shown in FIG. 11 from one end of the glass plate 11 to the other end. The conductive filament trigger is heated to a temperature at which the edge of the glass plate becomes electrically conductive by forming an electric path at the beginning of energization, and in the summer, the filament itself burns and heats the edge of the glass plate to a high temperature. If the glass plate becomes electrically conductive, the current will flow along the edge of the glass plate, and the inside of this edge will become an electric path. It is particularly preferable to use a material whose specific resistance is at least one order of magnitude lower. By constructing the conductive wire trigger from a material that burns out in this way, it is possible to effectively heat the ends of the glass plate with electricity, and after joining both ends of the glass plate, the *stripe It is preferable in terms of appearance because it does not leave any residue. Of course, materials that do not disappear even at high temperatures can also be used.

Note that if the electrical resistance of the conductive trigger is too low, the electricity will exceed 70 - and the voltage 'Ik must be lowered, which may lead to a power shortage and prevent welding of the ends of the glass plates. If the resistance is too soft, the applied voltage must be increased, and in that case heat generation may occur rapidly and foaming may occur in the glass, so it is necessary to maintain an appropriate resistance value.

As the conductive wire trigger, for example, conductive carbon paste, carbon paint, @BAST, and other camphor conductive pastes, paints, or suspensions are applied to the wire.
Carbon pastes and carbon paints that are burnt out at temperatures of 6001 to 800°C can be used. , or a conductive wire trigger to which a ribbon-like carbide is pasted can quickly heat the edge of the glass plate, and does not remain as a wire even after being joined as a strip, making it suitable for 1IIk. It is. In addition, when using flame burner electrodes, it is best to use carbon paste, low melting point metal paste, etc., which has a low resistance value and has the same resistance value as the flame burner electrode. electric t&
It is better to apply

The width of the conductive 1W strip trigger varies depending on the supplied power, the length 2 intervals of the portions of the glass plate to be joined, etc., but the most practical width is l m -I Q x mQ.

The conductive strip trigger may be provided on the inner surface of the end portion of the glass plate to be joined, or may be provided on the outer side thereof, or may be provided on both sides thereof.

An electrically conductive filament trigger is formed along the end line to be joined, and the glass plate is electrically connected to the electrical source so that a current flows through the conductive filament trigger.

A connection terminal such as RFi, metal clip, carbon paste IH, or a flame burner electrode is used to connect the conductive wire trigger and the lead wire of the power source.

By using a flame burner, it is possible to prevent deformation, roughening, or devitrification of the glass plate at the connection part, as with mechanical contact connection terminals, and to suppress a decrease in strength. Further, in the case of a 7-frame burner electrode, the glass plate portion t7 of the current feeding portion may be fire-bolted to prevent strength deterioration.

In addition, the flame burner electrode is attached to the end of the glass plate where it is to be fitted (printed with silver paste)
It is unsuitable for a method in which the edges S of the glass plates are softened and bonded by heating with electricity. This is because the resistance of the flame burner electrode is higher than that of a sheet paste printed wire, and it is difficult to control the resistance. According to Enyama, it is difficult to create a power source that can maintain the current flowing through the silver paste printed wire at a constant level, for example, 10 Ai degrees, so that it can be heated evenly.

On the other hand, in the case of a high-resistance conductive linear trimmer made of carbon paste or the like, the flame burner electrode and this III# have a resistance value that is approximately the same as the Okane degree, making it easy to design the power supply circuit. p.Practical.

Note that when connecting a clip connection terminal to the ont part of the conductive wire trigger and supplying power, the resistance of the clip may make it difficult to connect the clip connection terminal, or the glass plate at the end of the conductive wire trigger may Due to the difference in temperature above the softening point, clip marks may remain on the clip connection, resulting in defects such as lowering the product value, and click connections may become m-
In order to prevent this, a conductive wire trigger formed along the edges of the butted glass plates is made of a material with a lower electrical resistance than the mosquito wire. It is preferable to connect the ninth lead part electric path to which the connection terminal 1* such as a clip is attached and form it around the glass plate so that current flows through the nine lead part electric path.

In the present invention, one of the conductive filament trigger and the glass plate
As the current applied to the end of the glass plate after m1iIs becomes conductive, an alternating current with a commercial wave number to a high frequency or an i[lt current is used. In particular, high-frequency current is preferable because a high-voltage current can be easily obtained, it is effective for electrical heating of a glass plate starting from a high resistance, and overcurrent can occur due to breakage of the conductive wire trigger. Furthermore, even if the human body receives an electric shock during work, high-frequency electric waves are safer because they are not conducted inside the human body like low-frequency waves, but are conducted on the surface.

Furthermore, since the glass is electrically heated using high frequency waves, it is possible to use a flame burner electrode as described above, and it is possible to prevent a decrease in the strength of the glass plate at the electrode connection portion. Among them, a high frequency current in the range of 1 Q KHz to I MHz l'fh and 20 KH2 to 5Q KHg is the most practical. If it is lower than lOjlg, it is difficult to obtain a high voltage current, and when the conductive wire trigger breaks due to direct impact from the conductance of the glass, the current flows through the insulated and joined ends. It is difficult to heat the glass plate, and it takes time to heat the edge of the glass plate, which is disadvantageous.
If it is higher than Hz, the surface current of the glass is large, and it is also easy to leak, making it impossible to heat effectively, increasing the loss of the high frequency oscillator, generating radio interference, or generating standing waves. Otherwise, it is undesirable because it tends to cause electricity to be applied to the glass mounting machine and other processing jigs.

When bonding glass plates, it is important to select a frequency that does not cause standing waves at the edges of the glass plates, which serve as electrical paths for high-frequency current. If a high-frequency current is passed through the ends of the glass plates to be joined, and a standing wave is generated in the electric path, a disadvantage arises in that the ends are not uniformly heated. In addition, in the glass plate normally used, r
It is preferable that the frequency is below i5 MHz because the above-mentioned drawbacks will not occur.

In addition, the voltage applied to the end of the glass plate to be welded and/or the conductive strip trigger is 1a11.
This is around 10G7, that is, ULOOO to 1αoo for a normal size glass plate.

Range 1 of V is appropriate.

Applying an electric current tltt- to the conductive filament trigger of the glass plate,
When heating the glass plate along the edge of the glass plate, there is an 11 degree difference between the heating area at the edge of the glass plate and the other parts, and the entire glass plate is rolled up to an 860° angle to prevent thermal cracking.
It is preferable to heat the glass to a temperature of 600° C. or above and below the softening point of glass, for example, 600° C. or below. Note that heating higher than 600°C is undesirable, and heating lower than 850°C is undesirable because a temperature difference will occur between the heating area of the bent portion 1111 and other parts, which may cause thermal cracking.

A conductive strip trigger was previously formed on the bonding line of the glass plate.The glass plate was then placed in a heating furnace and heated to 850°C to 550°C, especially 400°C to 500°C, and then the conductive wire trigger was formed as described above. When a similar voltage is applied, the conductive wire trigger is electrically heated, the edge of the glass plate is heated to the extent that it becomes conductive, and an electric current is applied to the end of the glass plate that is dripped on the conductive wire trigger. It flows and heats this end to a temperature above the softening point. When a current begins to flow through the bonding line of the glass plate and further heats up, the conductive strip trigger burns out. When the ends of the glass plates become heated to a temperature above the softening point, for example, B v o t; ~1.000° C., the ends of the abutting glass plates are bonded and bonded together. In addition, the glass plate temperature at the time of starting energization to the conductive filament trigger is 85O.
L: If it is lower than this, there is a risk that the glass plate will break before and after heating and energizing, which is not preferable.If the glass plate temperature is higher than 55DC, electric leakage will occur, making it impossible to perform effective welding, and the glass plate molded product will be R-shaped. So it's not a good case.

Since the material is heated by resistance heating, the heating speed is extremely fast, and the time required for the dissociation and bonding process can be significantly shortened. For example, welding and joining processing can be performed in units of several seconds to several tens of seconds, and mass production is easy.

After the welding process, the glass sheet molded body that is sharply bent and welded and bonded by the method of the present invention can be strengthened or slowly cooled as required.

Next, the actual string of the present invention will be explained.

Example! ! A glass plate (thickness 4all) was cut into the shape shown in Fig. 1 to obtain a glass plate molded body having the shape shown in Fig. 2. In this cutting shape, the length of the opposite ends of the glass plate @ C and D of the notch part is 200 M, the length of bend -8 is 700 mm, and the length of J-out curve B is 5ooa+ .

The glass plate is placed on a mold and the glass plate is bent sharply.
Width grub ~5 at intervals of 2 to 5 on St
As, a ribbon-shaped nonichrome heater wire having a thickness of 1112d to 011111mm is arranged so as to be tensioned, and power supply terminals are attached to both ends of this nichrome heater wire to supply power.9. The bending die is made so that the bending line of the glass plate coincides with the line connecting the movable part, the non-movable part, and a pair of hinges with a length of 1 km, so that the bending position does not move up and down, and the heater wire is always attached to the glass plate. A device designed to maintain a distance of one foot was used.

The glass plate prepared in this way was put into a heating furnace and heated to 650°C.
Heating the glass plate to 1100°C, then feeding 1sooWo power to the nichrome heater strip and heating it to 1100°C,
Soften the bent 1 part of the glass plate and bend it by gravity.
llll! Prepare a preliminary glass plate molded body as shown in Fig. 2 by aligning the opposite ends of the glass plates with the notched parts.

After a long time, a conductive carbon paste (t-m) was applied onto the outer edge of the glass plate at the abutting part of the preliminary glass plate molded body to form a strip with a width of 8 to 400 mm, dried, and a conductive wire was applied. A row trigger was formed.

The electrical resistance of this conductive filament trigger was adjusted to between 2Ω and 4KQ to prevent the glass from being welded due to insufficient power and to prevent foaming in the glass due to rapid heat generation. This terminal end glass plate molded body was supported by a full-circumference support type baking machine insulated with Micalex, placed in a heating furnace and heated at -C, and when the glass plate reached a temperature of 480°C to 470°C, the above-mentioned conductive Flame burner electrodes were placed at both ends of the sex stria trigger, and a frequency electric current N was passed through the frame of the flame burner electrodes. This high frequency current was designed to generate heat at around 80 KHz so that the trigger could be heated evenly and the flame burner could be used to supply power.

811 As shown in figure 1, p high frequency current is applied to the flame burner.
850℃~
The glass plates were heated to about 900° C. to soften the ends of the glass plates as shown in FIG. 12, and the abutting portions were welded and joined.

As described above, according to the method of the present invention, a molded glass plate for automobiles, stereo racks, showcases, furniture, and various other uses having a sharply curved shape on eight or four sides can be obtained from a glass plate. It is possible to process it industrially, and the finish of the obtained glass plate molded product is as good as 9, making it extremely useful industrially.

[Brief explanation of drawings]

Fig. 1.3.5.7.9 shows a plan view of a nine-gasis plate cut into desired dimensions and shapes for manufacturing a glass plate molded body by the method of the present invention, and Fig. 44.6.8. Figure 10 is
Fig. 11.12 shows a perspective view of a glass plate molded body formed according to the present invention, and Fig. 11.12 shows an explanatory view showing the method of the present invention. 1, 11; Glass plate, 18; Conductive wire trigger. Part of corner, B: Notch. C, D: Edges of the glass plates at the mating part. S1 day,, st; bending curve 72 riversai 4 questions, ts clear g )yA off)A Sai8 river

Claims (1)

[Scope of Claims] (1) A glass plate is cut into a shape with a notch S at a part of the corner of the glass plate, which can be bent along a desired curve to obtain a desired shape. The cut glass plate is heated, and the oH curved portion of the glass plate is locally heated to a temperature higher than the softening point temperature of the glass plate, and sharply bent and seamed along the bending line to separate the glass facing the notch. The ends of the plates are glued together, and then the edges of the nine butted glass plates are locally heated to a temperature higher than the softening point temperature of the glass plates to weld the edges W6 of the butted nine glass plates together. 1. A method for forming a glass plate, characterized by joining and forming the glass plate into a predetermined maximum M shape. (2) Form a conductive wire trigger on at least one of the ends of the nine glass plates that are butted together, and apply current to the conductive wire trigger to make the end of the glass plate conductive and generate heat from the wire trigger. The ends of the glass plates are heated to make them conductive, and the current is applied to the ends of the glass plates, thereby heating the glass plates to a temperature above the softening point of the glass plates, and the edges of the butted glass plates are heated to a temperature above the softening point of the glass plates. 2. The method of forming a glass plate according to claim 1, wherein the parts are bonded by f7r#1 to form a 1-% value. (8) Commercial frequency (50 Hz to 1 Mkiz AC current sound) Applying current to the conductive wire trigger causes t% mold. Claim 2 - Method for molding a glass plate of an IC. (4) 10 KHz to 1 A method for forming a glass plate according to claim 2, characterized in that a high frequency current of MEN is applied to the conductive line trigger. The method for processing a glass plate according to claim 2, characterized in that the conductive wire trigger generates heat and uses a material that burns out after death. A method for forming a glass plate according to claim S, characterized in that a galvanotactic conductive filament trigger is used. (7) The method for forming a glass plate according to claim 21A, wherein flame burners are arranged at both ends of the conductive wire trigger and a high frequency electric current +51 is applied. (8) The second aspect of the present invention is characterized in that the glass preform is insulated with an insulating material, supported by a mold, and heated and then energized with a high frequency current. ! A method for forming a glass plate as described in IJ.