JPH06219759A - Glass of curved surface and its production - Google Patents

Abstract

PURPOSE:To obtain high-precision curvature in good reproducibility and high- quality curved glass efficiently by laying an upper endothermic part and a lower endothermic part dispersedly arranging gaps for gas circulation between a glass plate material and a heating part of a furnace. CONSTITUTION:A mold 3 comprising plural arranged bare members 18 which are brought into contact with peripheral parts of a glass plate material 2 and makes a given curved shape is held through support of an outer frame 19 on an inner flame 20 connected to the outer frame 19 with a rib part and integrated on a mobile holding frame. In a method of placing the glass plate material 2 on the bent type mold, introducing into a furnace, bending the glass plate material 2 into a curved face having at least a semicircular shape, the following operation is carried out. Namely, an upper endothermic part 4 and a lower endothermic part 5 dispersedly arranging gaps for gas circulation are laid between the glass plate material 2 and a heating part of a furnace 8 at the peripheral part of the surface side and the under surface side of the mold 3 to give the objective curved glass.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-circular shape having at least a smooth and relatively large radius of curvature, and in particular, a radius of curvature of 900.
~ 1300R, preferably 1000-1200R curved glass,
The present invention also relates to a method for manufacturing curved glass, which bends a glass plate by a dead-weight bending method in which peculiar heat absorbing parts are arranged at upper and lower specific parts.

In particular, the curved glass is useful as a window glass, a touch panel, etc. for architectural or various glass articles.

[0003]

2. Description of the Related Art Conventionally, for example, a glass plate having a complex complicated bend such as deep bend or S-shaped bend requires a bend with a relatively small radius of curvature and a relatively large radius of curvature, and local heating or the like is required. It has been proposed that the heat distribution pattern provided is provided as a heat source, and that a bending die provided with a reflecting member, a heat absorbing member, a heat shielding member, or the like is also appropriately used.

For example, Japanese Unexamined Patent Publication (Kokai) No. 62-265138 describes a mold and method for shaping a glass plate, and a desired shape of the glass plate shaped slightly inward of the outer periphery of the glass plate. Locating a shaped glass plate on a support frame having a shaped rail with a support surface whose front and outer contours coincide with each other; and the glass so that the glass plate flexes and contacts the shaped rail. Heating the plate to its deformation temperature and thermal deformation of the selected portion where the shielding member re-radiates the heat so as to absorb heat from the heat source and reduce the shielding effectiveness of the shielding member. Shielding the selected portion of the glass sheet from the heat source by placing the shielding member between the selected portion and the heat source to delay reaching the temperature of the selected portion. Includes, In a method of shaping a glass sheet by flexural bending, spaced from and positioned between a selected one of the shielding members and the selected portion to shield the selected portion. It is disclosed to include the step of providing additional shielding.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, for example, in the mold and method for shaping a glass plate described in Japanese Patent Laid-Open No. 62-265138, a lightweight glass plate having a complicated shape is formed. Bending iron shield, especially for example just 1.58 thick
By using a shielding material composed of a 7 mm lightweight heat-resistant plate, in a relatively smooth semi-circular glass plate with a radius of curvature of, for example, 900 to 1300 R, a double phenomenon (for example, curved surface deformation due to variation in curvature causes Optical distortion, etc.) cannot be sufficiently eliminated even if it is considerably improved, and it is not always possible to always obtain a semi-circular glass plate having a relatively smooth radius of curvature. It does not happen.

Further, in some cases, for example, when the glass plate is bent and formed into a semi-circular shape and then cooled, especially when the cooling speed is accelerated to some extent, the cooling airflow or air is unbalanced and uneven cooling is performed. Occurs, and various cracking phenomena such as cracks are likely to occur, resulting in deterioration of productivity, workability, thermal efficiency, etc. Furthermore, in the case of, for example, raw bending, the production cycle (also referred to as tact) is It becomes longer and lowers productivity.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, in which a glass plate-shaped body is made to have at least a relatively large smooth radius of curvature, that is, 90
When bending into a semi-circular glass plate having 0 to 1300R, a curved surface having a desired curvature can be obtained by simply isolating the shielding member and the heat absorbing member from the glass plate at the lower part of a predetermined place. It is difficult to obtain, and defects such as burrs that are difficult to eliminate, or troubles such as breakage of the glass plate, are likely to occur. It is possible to obtain a curved glass that is a semi-circular glass plate having at least a smooth and highly accurate radius of curvature as well as a relatively large radius of curvature of high quality, which is solved by arranging the curved glass. To provide curved glass useful in a wide range of fields, such as glass windows for construction, glass panels such as touch panels, and a method for producing it with high precision, high efficiency and excellent quality A.

That is, the present invention has a radius of curvature of 900 to 13
A curved glass, which is a glass plate having at least a curved surface of 00R. Also, the above-mentioned curved glass, wherein the glass plate has a thickness of 0.7 to 8 mm and is a green plate or a semi-strengthened or strengthened glass plate.

Further, the outer frame and the inner frame, which is connected to and integrated with the outer frame of the support frame by rib portions, are brought into contact with the peripheral portion of the glass plate,
A mold comprising a plurality of post-locking members arranged in a desired bent shape is carried through the support of the outer frame, and a glass plate-shaped body is placed on the bent mold, To a heating furnace to bend the glass plate into a curved surface having at least a semi-circular curved surface by a self-weight bending method, heating the glass plate and the heating furnace at the upper and lower peripheral portions of the mold. A method for producing curved glass, characterized in that an upper endothermic part and a lower endothermic part in which a gas flow gap is dispersedly arranged are disposed between the part and the part.

Further, the above-mentioned curved glass is characterized in that the upper and lower heat absorbing parts in which the gas flow gaps are dispersedly arranged are formed by dividing a plurality of heat-resistant rod-shaped members into gaps with a gap therebetween. Manufacturing method.

Further, the curved glass manufacturing method as described above, characterized in that the upper and lower heat absorbing portions of the upper peripheral portion are pivotably opened and closed. Furthermore, each of the above-mentioned curved glass manufacturing methods is characterized in that the shape of the top surface of the above-mentioned plurality of grouped members is a mold surface of a mold having a radius of curvature R of 900 to 1300 mm. .

As described above, the radius of curvature is 900
The curved glass, which is a glass plate having at least a curved surface of 1300 R, is a touch panel or various kinds of architectural window glass, for example, which has a smooth and desired curvature that eliminates defects such as debris. This is because it can be made into a curved surface with excellent quality and is friendly to people and the environment, and can be made excellent in terms of design, and can be sufficiently adopted as a window glass for various vehicles. A preferable radius of curvature is about 1000 to 1200R.

Further, the glass plate has a thickness of 0.7 to 8
mm, the curved glass described above is a green plate or a semi-strengthened or tempered glass plate,
If the thickness is less than 0.7 mm, not only is it difficult to obtain the desired curved glass, but also if the area is relatively large and laminated glass is used, for example, cost problems will gradually arise. This is because the self-weight bending method gradually takes too much time and is not preferable in terms of cost. The preferable plate thickness is about 1 to 6 mm, more preferably about 1.5 to 5 mm.

Further, an upper endothermic part and a lower endothermic part in which gas flow gaps are dispersed are provided between the glass plate and the heating part of the heating furnace in the upper and lower peripheral parts of the mold. For example, the size is about 600mm x 50
If a glass plate having a thickness of about 3.2 mm and a plate thickness of about 3.2 mm is to have a curved surface with a radius of curvature of about 1000 R and no heat absorbing member is installed, a large amount of debris appears around the plate and the plate It deforms into a shape and the desired curved surface cannot be obtained.For example, in the case of a plate-like lower endothermic part without a gap, it will be close to the desired curved surface, but the air balance during cooling is poor and cooling The balance becomes non-uniform, cracks are likely to occur at the heat-absorbing member installation portion, the takt is deteriorated in raw bending, and productivity is reduced. For example, a lower heat-absorbing member having a gap is provided. If the lower endothermic member is a curved surface in the middle of the presence or absence, it does not become the desired curved surface, etc., except that the upper endothermic part and the lower endothermic part are arranged at the specific part, Defects such as doubles with sufficiently smooth and uniform curvature This is because it is difficult to obtain a curved glass having a desired curved surface without exhibiting the above.

Further, as the upper and lower heat absorbing parts and the heat absorbing member, the heat absorbing parts are constructed as shown in FIGS.
The heat absorbing member is a heat-resistant rod-shaped body, for example, a stainless steel rod having a diameter of about φ5 to 7 mm, specifically, a SUS304 round rod or a silicon carbide round rod (may be hollow). In the case where a plurality of heat absorbing members are provided in the upper and lower heat absorbing portions in which the gas circulation gaps are dispersedly arranged, and the heat absorbing members are split and arranged in a gap shape, the gap is, for example, about 5 to 7 mm. The number of continuous heat absorbing members is about 5 to 13
About this, the width of the heat absorbing part is about 70 to 150 mm.

Further, the fact that the upper and lower heat absorbing portions of the upper peripheral portion are pivoted so as to be openable and closable means that the glass plate-like body is fully opened, especially when it is placed on or taken out from the mold precessing member, In addition, it is necessary to rotate and open and close at least the upper heat absorbing portion in order to set for performing the bending treatment, and it is convenient to rotate the lower heat absorbing portion at the time of repair or the like. Needless to say, the lower heat absorbing portion may be of a fixed type.

Still further, it is further determined that the top surface shape of the above-mentioned grouped arbor members is a mold surface having a radius of curvature R of 900 to 1300 mm.
Needless to say, this is to obtain the bent glass.

The glass plate is preferably an inorganic transparent glass plate, and is not particularly limited to colorless or colored, its kind, color tone, shape, etc., and further as bent plate glass. It goes without saying that it can be used as various tempered glass, strength-up glass, and single plate, and can also be used as multi-layer glass or laminated glass.

[0019]

As described above, according to the curved glass of the present invention and the method for producing the curved glass, the curved glass having a smooth and relatively large radius of curvature having a radius of curvature of at least 900 to 1300R, and the curved glass are manufactured by a conventional mold. On the other hand, a peculiar heat absorbing member, for example, a heat-resistant round bar, a peculiar heat absorbing part, for example, as a heat absorbing part of a configuration in which the round bars are connected in a sloping shape at intervals, on the upper side of the glass plate and the lower side of the mold. By arranging in a specific part that covers the peripheral part of the glass plate, the balance is improved remarkably in terms of heat and ventilation, eliminating deformation and debris phenomenon without requiring excessive capital investment, It is possible to obtain a smooth, looser and more accurate curvature with good reproducibility, and there is no trouble such as damage in the process, so it is a stable and reliable work and productivity is improved. Can be made efficient good high quality, it can be started Tatsuchipaneru, architectural various window glasses or the like, may be employed in various fields.

[0020]

Embodiments of the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited to the embodiment.

FIG. 1 shows a curved glass 1 in a perspective view, which has a size of about 600 mm × 500 mm and a plate thickness of about 3.2 to 3.5 mm.
It is a curved glass plate having at least a semi-circular curved surface having a radius of curvature of 1000 to 1200 R, specifically, a curved glass for a touch panel.

FIG. 2 is a side view showing a state before the glass plate-like body 2 is placed on the mold 3 and set up before being introduced into the heating furnace during the bending treatment. 2, around the upper and lower sides of the mold 3 , above the glass plate 2, through a hinge 7 from the mold 3 , a stainless steel round bar having a diameter of about φ6 mm, specifically The heat absorbing member 6 which is a round bar made of SUS304 is divided and arranged at a distance of about 6 mm in a scalloped manner, and the upper heat absorbing portion 4 is arranged. The heat absorbing member 6 similar to the above is disposed below the mold 3. The lower endothermic portion 5 is arranged in a continuous manner by dividing and arranging it in the same manner as described above in the same manner as the above.

FIG. 3 is a view of the mold 3 partially specifically illustrated in FIG. 2, the mold 3, and upper and lower vertical portion absorbing portion disposed on the side 4, 5 as well as partially showing the structure of the heat absorbing member 6 FIG. 2 is an enlarged perspective view showing the outer frame 19
On the inner frame 20 which is connected and integrated with the outer frame 19 by the rib portion 21, a plurality of pieces are arranged so as to be in contact with the peripheral portion of the glass plate and arranged in a desired bent shape. In the mold 3 composed of the member 18, the upper heat absorbing portion 4 is arranged at the upper and lower peripheral portions of the mold 3 on the outer frame 19 via the hinge 7 which is openably and closably open, and is in the open state. The heat absorbing portion 5 is fixed to the inner frame 20 in a set-up shape,
The upper and lower heat-absorbing parts 4 and 5 in which gas-flowing intervals are dispersedly arranged are a plurality of about five heat-absorbing members 6 which are round rods made of stainless steel having a diameter of about 6 mmφ, and an interval of about 6 mm as described above. It is arranged by arranging them in a sudare pattern.

FIG. 4 shows the upper heat absorbing portion 4 shown in FIGS.
FIG. 4 is a plan view of the case where the set-up is performed as shown in FIG. 2, and is a case where about 10 round bars as the heat absorbing member 6 are arranged as shown in FIG.

FIG. 5 shows the upper heat absorbing portion 4 shown in FIGS.
FIG. 5 is a plan view of the state of FIG. 2 to FIG. 4 when it is expanded to the maximum, particularly when the glass plate body 2 is placed on the mold 3 , when it is taken out, and when repair and maintenance are performed. Etc. open and spread.

FIG. 6 shows the upper and lower heat absorbing parts shown in FIGS. 2 to 5.
Fig. 4 is a perspective view showing a conventional mold 3 before disposing 4 , 5 and a support frame (not shown), for example, a support carriage, on which four supports 22 of the outer frame 19 are attached.
After mounting, mount and fix to position and carry.

FIG. 7 is a vertical cross-sectional view showing a process of manufacturing a curved glass which is an embodiment of the present invention.
As shown in FIG. 6, the glass plate 2 is placed on the mold 3 and set up, and is fixedly carried on the support carriage 12 on the transport roll 11 via the support 22 shown in FIG. In the preheating chamber 9 of the heating furnace 8 in which 13 and 14 are provided, preheating is performed to, for example, about 600 ° C., and then the process proceeds to the forming chamber 10 and, for example, with a drop burner, about 63 ° C.
Bend processing is performed at about 0 ° C, and after further processing, it exits the heating furnace 8 and is located in the blast head 15 , and the upper and lower heads are located.
The glass was cooled from 16 and 17 with compressed air of about 1 kg / cm ² to obtain a semi-reinforced curved glass.

By doing the above, stable and smooth work can be performed without trouble such as cracking of the glass plate, the cycle can be shortened and improved, and defects such as double phenomenon can be solved. And a smooth radius of curvature of about 10
At 00R, it becomes a curved surface with a more accurate curvature, becomes a curved glass that is an excellent semi-circular glass plate, and becomes a touch panel product with high efficiency and reproducibility and high quality, and the desired result can be achieved. It was

[0029]

As described above, according to the present invention,
By arranging a plurality of unique heat absorbing members in a scalloped pattern on the upper and lower sides of the peripheral part of the self-weighting type mold, the heat and gas distribution are balanced and appropriately equalized, and much smoother. It becomes a curved glass with a precise curvature, and it can be obtained stably, efficiently and with good reproducibility without any trouble such as breakage of the glass plate in the process. High quality glass such as touch panel. The present invention provides a curved glass that is widely useful for various glass articles and the like and a method for producing the same.

[Brief description of drawings]

FIG. 1 is a perspective view showing a curved glass according to an embodiment of the present invention.

FIG. 2 is a side view showing a state before a glass plate-shaped body is placed on a mold and introduced into a heating furnace when performing a bending treatment in the present invention.

FIG. 3 is a partially enlarged perspective view showing the configurations of the mold, the upper and lower heat absorbing parts arranged on the upper and lower sides thereof, and the heat absorbing member according to the present invention.

4 is a plan view of the upper heat absorbing portion shown in FIGS. 2 to 3 when it is set up as shown in FIG.

FIG. 5 is a plan view of the upper endothermic portion shown in FIGS. 2 to 4 when the upper end heat absorbing portion is expanded from the state of FIGS. 2 to 4 to the maximum.

FIG. 6 is a perspective view showing a conventional mold before the upper and lower heat absorbing parts shown in FIGS. 2 to 5 are arranged.

FIG. 7 is a vertical cross-sectional view showing one embodiment of the process of carrying out the present invention.

[Explanation of symbols] 1 curved glass 2 glass plate 3 mold 4 upper endothermic part 5 lower endothermic part 6 endothermic member 8 heating furnace 9 preheating chamber 10 forming chamber 11 transfer roll 12 support carriage 13 heating part 14 heating part 15 blast Head 16 Upper head 17 Lower head 18 Hagata member 19 Outer frame 20 Inner frame

Claims (6)

[Claims] 1. A curved glass, which is a glass plate having at least a curved surface having a radius of curvature of 900 to 1300R. 2. The curved glass according to claim 1, wherein the glass plate has a thickness of 0.7 to 8 mm and is a green plate or a semi-strengthened or tempered glass plate. 3. An outer frame, and an inner frame, which is connected to the outer frame and a rib portion of the inner frame, are connected to a movable supporting frame body, and abutting the peripheral portion of the glass plate-like body to form a desired bent shape. A mold composed of a plurality of post-members arranged in such a manner as to be carried through the support of the outer frame, and a glass plate-like body is placed on the bent mold, and this is guided to a heating furnace. In the method of bending the glass plate into a curved surface having at least a semi-circular curved surface by a self-weight bending method, between the glass plate and the heating part of the heating furnace in the upper and lower peripheral portions of the mold. ,
A method for producing curved glass, characterized by comprising an upper endothermic part and a lower endothermic part in which gas flow gaps are dispersedly arranged. 4. The upper and lower endothermic portions in which the gas flow gaps are dispersedly arranged are formed by disposing a plurality of heat resistant rod-shaped members in a sloping manner with a gap therebetween. Curved glass manufacturing method. 5. The method for manufacturing curved glass according to claim 3, wherein the upper and lower heat absorbing portions of the upper peripheral portion are configured to be freely opened and closed. 6. The curved surface glass according to claim 3, wherein the shape of the top surface of the grouped post-locking members is a mold surface having a radius of curvature R of 900 to 1300 mm. Manufacturing method.