JP2016169116A - Method for molding plate-like material and molding die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for molding a plate-like material, capable of easily accurately placing a plate-like material into a molding die and stably supporting the plate-like material until heat treatment is performed after placing the plate-like material in the molding die, and a fire-resistant molding die (a setter) having a valley shape or a mountain shape.SOLUTION: A method for molding a plate-like material, capable of softening a glass plate 2 by heat treatment after placing a glass plate 2 on the upper end portion of a setter having a curved surface to be bent into an arc-shape or an elliptical arc shape in a cross sectional view on a vertical flat surface perpendicular to the plate thickness direction of the setter comprises: the placement step of placing the glass plate 2 on a setter flat part 111 previously formed in order to place the glass plate 2 on the upper end portion; and the deformation step of softening the glass plate by heating the glass plate 2 placed on the flat part 111 to be bent. The molding die is fire-resistant.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a method for forming a plate-like material in which a plate-like material is placed on a mold and then softened by heat treatment and bent, and a technique of a mold for forming the plate-like material.

In a heating device such as a stationary stove or a fireplace, crystallized glass having various shapes such as a flat plate shape, a bent shape, or an arc shape is used for a part of the window glass or the heating device so that the inside thereof can be visually recognized. It has been.
Here, for example, in the case of manufacturing an arc-shaped crystallized glass, a plate-like shape is conventionally used by using a fire-resistant mold (so-called torch) having a valley shape (a shape having a curved concave portion). The glass plate which is a thing was curved in circular arc shape.
However, in recent years, for arc-shaped crystallized glass, there is an increasing demand for varieties having a large arc angle, and in order to produce crystallized glass having a large arc angle, a large glass plate will be used. With a valley-shaped torch, it was difficult to curve while holding such a glass plate.
For this reason, when manufacturing crystallized glass with a large arc angle, a flat glass plate was bent into an arc shape using a chevron-shaped torch (a shape having a curved convex portion). .

JP 2012-91994 A

Here, as a technique for producing crystallized glass having a large arc angle, Patent Document 1 discloses a method using a chevron-shaped torch (hereinafter, simply referred to as “tochi” unless otherwise specified). Has been.
Specifically, for example, there is a method of softening and deforming a glass plate by a continuous furnace such as a batch-type kiln or a roller house kiln, and manufacturing crystallized glass having a required arc angle using a chevron-shaped torch. It is shown.

However, since the upper end portion of the torch on which the glass plate is placed has an arc shape, it is difficult to place the glass plate at an accurate position of the upper end portion of the torch when the glass plate is bent into an arc shape. .
As a result, for example, in a plurality of plate-like torch arranged in parallel and in a straight line, the glass plate is placed in an obliquely extending direction with respect to the arrangement direction of the plurality of torch, There was a risk of twisting the glass plate after bending.

Further, in a state where the glass plate is placed on the upper end portion of the torch, the glass plate is in a point contact state with the upper end portion of the torch, the contact area is small, and the placing posture of the glass plate tends to be unstable.
Therefore, it is difficult to place the glass plate accurately and horizontally on the torch. Moreover, when a conveyance process, such as a roller house kiln, is involved, there is a possibility that the glass plate may deviate from the position where it was originally placed during the conveyance.

  Furthermore, if the glass plate cannot be accurately placed on the torch by aligning the center of the glass plate with the apex of the upper end of the torch, the shape of the glass plate after bending as a product is predetermined. Further, depending on the shape and weight of the glass plate before bending, there is a possibility that the glass plate may fall from the torch during conveyance.

  The present invention has been made in view of the present problems as described above, and can easily perform an operation of accurately placing a plate-like object on a molding die. It is an object of the present invention to provide a method for molding a plate-like object and a mold that can stably support the plate-like object after being placed on the mold until heat treatment is performed.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, after placing a plate-like object on the upper end of a mold having a curved surface, it is softened by heat treatment and bent into an arc shape or an elliptical arc shape in a cross-sectional view in a vertical plane perpendicular to the plate thickness direction of the mold. A method for forming a plate-like material,
A flat portion for placing the plate-like object is formed in advance on the upper end portion, and a placing step of placing the plate-like object on the flat portion of the molding die, and the flat portion are placed on the flat portion. And a deforming step of softening and bending the plate-like material by heating.

According to the method for molding a plate-like object of the present invention having such a configuration, the place where the plate-like object is placed on the mold becomes easy to understand by forming the flat portion on the mold.
Accordingly, it is possible to easily perform an operation of accurately placing the plate-like object on the molding die by aligning the center position of the plate-like object with the center position of the flat portion.
In addition, by placing the plate-like object on the flat part, the contact area between the plate-like object and the mold can be increased, and the plate-like object is supported by the flat part, so that the plate-like object is stable. It becomes possible to support.
This not only makes it possible to prevent the plate-like object from being displaced due to vibration or the like when the mold is conveyed while the plate-like object is placed on the mold. It becomes possible to improve the precision of the shape of the product manufactured by bending.

  In the plate-like material forming method of the present invention, in the deformation step, the plate-like material is bent so as to be bent while forming a gap with the flat portion of the forming die.

  According to the method for forming a plate-like object of the present invention having such a configuration, the plate-like object can be bent into a predetermined arc shape or elliptic arc shape without being along the flat portion of the forming die.

Moreover, in the method for molding a plate-like material of the present invention, the plate-like material is crystalline glass,
In the deformation step, the crystalline glass is bent and crystallized.

  According to the method for forming a plate-like product of the present invention having such a configuration, a crystallized glass plate that has been bent can be produced.

  Further, in the method for forming a plate-like object of the present invention, the weight of the plate-like object is 2 kg or more. In the deformation step, the plate-like object has an arc angle of 115 ° or more and an arc length. It is bent into the arc shape of the sectional view of 300 mm or more.

  According to the method for forming a plate-like object of the present invention having such a configuration, it becomes possible to manufacture an arc-like plate-like object having a relatively large weight, arc angle, and arc length.

  In the method for forming a plate-like product of the present invention, the heating temperature for heating the plate-like product is within the range of Tg to (Tg + 50) ° C. when the glass transition temperature is Tg. Set.

  According to the method for forming a plate-like product of the present invention having such a configuration, the plate-like product can be softened and deformed by performing a heat treatment of the plate-like product.

  Further, in the method for molding a plate-like object of the present invention, in the molding die, the molding surface is formed so as to follow an arc of a virtual circle in the sectional view, and a gap between the upper end of the virtual circle and the flat portion is formed. The dimension is not less than 0.3 mm and not more than 2.0 mm, and the first imaginary straight line connecting the center of the virtual circle and one end of the flat portion, and the center of the virtual circle and the other end of the flat portion are connected. The angle formed by the second imaginary straight line is 2 ° or more and 10 ° or less.

  According to the plate-shaped article forming method of the present invention having such a configuration, the dimension of the flat portion can be set to a preferable dimension for bending the sheet-like article.

  Further, in the method for molding a plate-like object of the present invention, in the molding die, the molding surface is formed so as to follow an arc of a virtual ellipse in the sectional view, and a gap between the upper end of the virtual ellipse and the flat portion. The dimension is not less than 0.3 mm and not more than 2.0 mm, and the first imaginary straight line connecting the center of the virtual ellipse and one end of the flat part, and the center of the virtual ellipse and the other end of the flat part are connected. The angle formed by the second imaginary straight line is 2 ° or more and 10 ° or less.

  According to the plate-shaped article forming method of the present invention having such a configuration, the dimension of the flat portion can be set to a preferable dimension for bending the sheet-like article.

  In the method for molding a plate-like object of the present invention, in the molding die, the width of the flat portion in the bending direction of the plate-like object is 2% or more and 10% of the width dimension of the plate-like object in the bending direction. Is within.

  According to the plate-shaped article forming method of the present invention having such a configuration, the dimension of the flat portion can be set to a preferable dimension for bending the sheet-like article.

  The molding die of the present invention is a molding die for molding a plate-like object along the molding surface, and a flat surface provided at the upper end and a vertical direction perpendicular to the plate thickness direction of the molding die. A first molding surface that extends curvedly downward from one end of the flat surface in a sectional view in a plane, and a second molding surface that curves and extends downward from the other end of the flat surface in the sectional view. The first molding surface and the second molding surface are formed so as to follow the same virtual circular arc or virtual elliptical elliptic arc in the cross-sectional view.

According to the molding die of the present invention having such a configuration, the place where the plate-like object is placed in the molding die can be easily understood by forming the flat portion in the molding die.
Accordingly, it is possible to easily perform an operation of accurately placing the plate-like object on the molding die by aligning the center position of the plate-like object with the center position of the flat portion.
In addition, by placing the plate-like object on the flat part, the contact area between the plate-like object and the mold can be increased, and the plate-like object is supported by the flat part, so that the plate-like object is stable. It becomes possible to support.

  According to the method for molding a plate-like object and the mold according to the present invention, it is possible to easily perform the operation of accurately placing the plate-like object on the mold, and the plate-like object is placed on the mold. After being placed, the plate-like object can be stably supported until heat treatment is performed.

Sectional drawing of a torch. Sectional drawing for demonstrating the shape of a torch. Sectional drawing which shows the bending process of the glass plate of one Embodiment of this invention. Sectional drawing which shows the bending process of the glass plate of one Embodiment of this invention. Sectional drawing which shows the bending process of the glass plate of one Embodiment of this invention. Sectional drawing which shows the bending process of the glass plate of one Embodiment of this invention. Sectional drawing for demonstrating the dimension of a torch. Sectional drawing for demonstrating the ratio of the dimension of a torch and a glass plate. The figure for demonstrating the circular arc angle and circular arc length of the outer peripheral surface of the glass plate after a bending process. Sectional drawing of a torch. Sectional drawing for demonstrating the shape of a torch. Sectional drawing which shows the bending process of the glass plate of one Embodiment of this invention. Sectional drawing which shows the bending process of the glass plate of one Embodiment of this invention. Sectional drawing for demonstrating the dimension of a torch. Sectional drawing for demonstrating the ratio of the dimension of a torch and a glass plate. The figure for demonstrating the elliptical arc angle and elliptical arc length of the outer peripheral surface of the glass plate after a bending process.

  Hereinafter, preferred embodiments will be described. However, the following embodiments are merely examples, and the present invention is not limited to the following embodiments. Moreover, in each drawing, the member which has the substantially the same function may be referred with the same code | symbol.

  FIGS. 1 to 8 and FIGS. 10 to 15 are cross-sectional views showing a cross-sectional view of the torch 11 or 21 as a mold in a vertical plane perpendicular to the plate thickness direction (the depth direction of the paper surface). FIG. 2 is a diagram in which a virtual circle C is displayed on the cross-sectional view of FIG. FIG. 3 is a cross-sectional view showing a state in which the glass plate 1 is placed on the flat portion 111 of the torch 11 of FIG. FIG. 4 is a cross-sectional view showing the softening deformation of the glass plate 1 of FIG. FIG. 5 is a cross-sectional view showing the glass plate 2 after bending. FIG. 6 is a cross-sectional view showing a crystallized glass plate 3 produced by crystallizing the glass plate 2 of FIG.

As shown in FIG. 1, a torch 11 that is a mold is placed on a setter 12.
The torch 11 has an upward convex shape that protrudes upward from the setter 12.
A flat portion 111, a first arc portion 112, and a second arc portion 113 are formed on the outer surface of the torch 11.

The flat part 111 is a flat surface.
Here, the flat part 111 of this embodiment is a horizontal surface, and is extended in the bending direction H (paper surface left-right direction of FIG. 1) of the torch 11.
Further, the flat portion 111 is formed at the upper end portion of the torch 11. The first arc portion 112 is a first molding surface that curves and extends downward from one end P1 of the flat portion 111 in the cross-sectional view. The second arc portion 113 is a second molding surface extending curvedly downward from the other end P2 of the flat portion 111 in the sectional view.

As shown in FIG. 2, the flat portion 111 of the torch 11 is disposed inside the virtual circle C and faces the arc Ca at the upper end portion of the virtual circle C.
The first arc portion 112 of the torch 11 is provided along the first arc Cb of the virtual circle C that is continuous with one end of the arc Ca at the upper end portion.
Further, the second arc portion 113 of the torch 11 is provided along the second arc Cc of the virtual circle C connected to the other end of the arc Ca at the upper end portion. That is, the first arc portion 112 and the second arc portion 113 of the torch 11 that are the molding surfaces are provided along the first arc Cb and the second arc Cc of the virtual circle C, respectively. The first arc portion 112 as the first molding surface and the second arc portion 113 as the second molding surface are formed along the arcs Cb and Cc of the same virtual circle C in the sectional view. .

The torch 11 can be formed of, for example, refractory ceramics or crystallized glass.
Here, specific examples of refractory ceramics include cordierite and mullite.
On the other hand, specific examples of crystallized glass include β-quartz solid solution and crystallized glass having β-spodumene solid solution as a main crystal.
In addition, although the torch 11 of this embodiment is formed in plate shape, the thing of the semi-cylinder shape which has the longitudinal shape extended in a plate | board thickness direction may be sufficient, for example.

By the way, in this embodiment, the glass plate 1 which is a plate-shaped object is crystalline glass.
Therefore, by heating the glass plate 1, it can be bent and crystallized.

Examples of the crystalline glass include glass that becomes crystallized glass by crystallizing, for example, β-quartz solid solution or β-spodumene solid solution as a main crystal.
The glass plate 1 is not limited to the crystalline glass as in the present embodiment, and any glass plate 1 may be used as long as it has a property that can be bent by heat treatment.

When the bending of the glass plate 11 is performed using the torch 11 having the above configuration, the glass plate 1 is placed on the flat portion 111 of the torch 11 as shown in FIG.
At this time, the glass plate 1 is placed on the flat portion 111 such that the central position X thereof is matched with the central position Y of the flat portion 111.
Thus, the glass plate 1 can be stably supported by placing the glass plate 1 on the flat portion 111 that is horizontally flat.

Here, the glass plate 1 has a flat plate shape, a placement portion 1a placed on the flat portion 111, a side portion 1b protruding from the placement portion 1a to one side in the bending direction (H direction), And an other side portion 1c protruding from the mounting portion 1a to the other side in the bending direction (H direction).
Moreover, the weight of the glass plate 1 becomes like this. Preferably it is 2 kg or more, More preferably, it is 3-20 kg. If the weight of the glass plate 1 is less than 2 kg, it is difficult to deform by its own weight in the deformation process described later, and high temperature or long-time heating is required, which may reduce productivity. Moreover, when the weight of the glass plate 1 is heavier than 20 kg, the torch 11 is easily damaged by the weight of the glass plate 1.

  The thickness of the glass plate 1 is not particularly limited, but is preferably in the range of 2.0 mm to 10.0 mm, more preferably in the range of 3.0 mm to 6.0 mm. It is preferably within the range of 0 mm to 5.0 mm.

  FIG. 4 shows a state where the glass plate 1 shown in FIG. 3 is softened by heat treatment and bent. FIG. 5 shows the glass plate 2 after bending.

The heat treatment for softening and deforming the glass plate 1 is performed at a heating temperature G that is not lower than the glass transition temperature and not higher than the temperature heated by 50 ° C. from the glass transition temperature.
By this heat treatment, the glass plate 1 is softened and deformed.

  Below, the bending process of the glass plate 1 is demonstrated.

  First, as shown in FIG. 3, the placement portion 1 a of the glass plate 1 is placed on the flat portion 111 of the torch 11 (placement step).

Next, heat treatment for softening and deforming the glass plate 1 is performed (deformation step).
The glass plate 1 is softened by being heated at the temperature G.

  As a result, as shown in FIG. 4, when the glass plate 1 is softened, one side portion 1 b of the glass plate 1 hangs down by its own weight and comes into contact with the first arc portion 112 of the torch 11, and the other side of the glass plate 1. The portion 1c hangs down by its own weight and comes into contact with the second arc portion 113 of the torch 11.

As the one side portion 1b and the other side portion 1c of the glass plate 1 hang down, the placement portion 1a of the glass plate 1 is bent and curved.
As a result, the placement portion 1a is curved along the arc Ca at the upper end of the virtual circle C (see FIG. 5).
Thereby, a gap Z is formed between the placement portion 1a and the flat portion 111.

  Then, as shown in FIG. 5, the glass plate 1 is bent into an arc-shaped glass plate 2 along the arc of the virtual circle C while forming a gap Z between the flat plate 111 of the torch 11. .

Here, the glass plate 2 after bending is in contact with the first arc portion 112 and the second arc portion 113 of the torch 11.
Therefore, the shapes of the first arc portion 112 and the second arc portion 113 of the torch 11 are reflected in the shape of the glass plate 2.

On the other hand, the glass plate 2 after bending forms a gap Z between the flat portion 111 of the torch 11.
Therefore, the shape of the flat portion 111 of the torch 11 is not reflected in the shape of the glass plate 2.
That is, the first arc portion 112 and the second arc portion 113 of the torch 11 function as a molding surface, but the flat portion 111 does not function as a molding surface.
In other words, the torch 11 is used in which the shape of the flat portion 111 is different from the shape of the glass plate 2 after bending.

In addition, in the said deformation | transformation process, the 2nd heat processing for crystallizing the glass plate 2 after a bending process may be performed, and the glass plate 2 may be crystallized.
Thereby, as shown in FIG. 6, the arc-shaped crystallized glass plate 3 along the arc of the virtual circle C is manufactured.

By the way, as shown in FIG. 7, in the torch 11 in the present embodiment, the first virtual line S1 extending from the center O of the virtual circle C to one end P1 of the flat portion 111 and the flat portion 111 from the center O of the virtual circle C. The angle θ1 formed by the second imaginary line S2 extending to the other end P2 is preferably 2 to 10 °, and the distance dimension (vertical distance) T between the vertex C1 at the upper end of the imaginary circle C and the flat portion 111. However, it is preferable that it is 0.3-2 mm.
Moreover, in the torch 11 in the present embodiment, it is more preferable that the angle θ1 formed by the first virtual line S1 and the second virtual line S2 is 5 to 10 °. Further, the vertical distance T between the vertex C1 and the flat portion 111 is more preferably 0.5 mm to 2 mm.
On the other hand, the angle θ1 formed by the first imaginary line S1 and the second imaginary line S2 is less than 2 °, or the interval dimension T between the top vertex C1 of the imaginary circle C and the flat portion 111 is less than 0.3 mm. Then, the dimension of the flat part 111 becomes small, and it becomes difficult to support the glass plate 1 by the flat part 111 stably by this.
Further, when the angle θ1 is larger than 10 ° or the interval dimension T is larger than 2 mm, the dimension of the flat portion 111 is increased, so that when the glass plate 1 is bent, the glass plate 1 It becomes easy to become a shape along the flat portion 111 without forming the gap Z, and it becomes difficult to bend the glass plate 1 into an arc shape.

  As shown in FIG. 8, in the torch 11 in the present embodiment, when the dimension in the bending direction H of the flat portion 111 is L and the dimension in the bending direction H of the glass plate 1 is L1, L is L1. The size is preferably 2 to 10%.

Moreover, as shown in FIG. 9, it is preferable that circular arc angle (theta) 2 of the outer peripheral surface of the glass plate 2 after a bending process is 115 degrees or more, More preferably, it is 120-180 degrees. The arc length L2 of the outer peripheral surface of the glass plate 2 after bending is preferably 300 mm or more, more preferably 400 to 1500 mm.
The present invention is particularly useful for forming an arcuate glass plate 2 having such a large arc angle θ2 and arc length L2 by bending. On the other hand, when the arc angle θ2 is less than 115 °, it is difficult to bend the glass plate 1 to a desired arc angle by its own weight. When the arc angle θ2 is larger than 180 °, it is difficult to remove the glass plate 2 from the torch 11. When the arc length L2 is less than 300 mm, it is difficult to curve the glass plate 1 to a desired arc angle by its own weight. Further, when the arc length L2 is longer than 1500 mm, the handling workability of the glass plates 1 and 2 is deteriorated, and the productivity is easily lowered.

  Hereinafter, a torch 21 that is a modification of the torch 11 will be described. Since the torch 21 is different only in shape from the torch 11, only the shape of the torch 21 will be described.

  As shown in FIG. 10, a flat portion 211, a first elliptic arc portion 212, and a second elliptic arc portion 213 are formed on the outer surface of the torch 21.

The flat part 211 is a flat surface.
Here, the flat part 211 of this embodiment is a horizontal surface, and is extended in the bending direction H of the torch 21 (left and right direction in FIG. 10).
Further, the flat portion 211 is formed at the upper end portion of the torch 21. The first elliptical arc part 212 is a first molding surface that curves downward and extends from one end P1 of the flat part 211 in the sectional view. The second elliptical arc portion 213 is a second molding surface that is curved and extends downward from the other end P2 of the flat portion 211 in the cross-sectional view.

As shown in FIG. 11, the flat portion 211 of the torch 21 is disposed inside the virtual ellipse D and faces the elliptical arc Da at the upper end of the virtual ellipse D.
The first elliptical arc part 212 of the torch 21 is provided along the first elliptical arc Db of the virtual ellipse D connected to one end of the elliptical arc Da at the upper end.
The second elliptic arc portion 213 of the torch 21 is provided along the second elliptic arc Dc of the virtual ellipse D that is continuous with the other end of the elliptic arc Da at the upper end. That is, the first elliptical arc portion 212 and the second elliptical arc portion 213 of the torch 21 that are the molding surfaces are provided along the first elliptical arc Db and the second elliptical arc Dc of the virtual ellipse D, respectively. The first elliptic arc portion 212 that is the first molding surface and the second elliptic arc portion 213 that is the second molding surface are formed along the elliptic arcs Db and Dc of the same virtual ellipse C in the sectional view. .

As shown in FIGS. 12 and 13, the glass plate 1 is heat-treated from the state of being placed on the flat part 211 of the torch 21, thereby forming a gap Z between the flat part 211 and the virtual ellipse. The glass plate 4 is bent into an elliptic arc shape along the elliptical arc of D.
The glass plate 4 after the bending process is in contact with the first elliptical arc part 212 and the second elliptical arc part 213 of the torch 21, but forms a gap Z between the flat part 211.
In addition, the 2nd heat processing for crystallizing the glass plate 4 after a bending process may be performed, and the glass plate 4 may be crystallized. Thereby, the crystallized glass plate of the elliptical arc shape along the elliptical arc of the virtual ellipse D is manufactured.

By the way, as shown in FIG. 14, in the torch 21 in the present embodiment, the first virtual line S1 extending from the center O of the virtual ellipse D to one end P1 of the flat portion 211, and the flat portion 211 from the center O of the virtual ellipse D. The angle θ1 formed by the second virtual line S2 extending to the other end P2 is preferably 2 to 10 °, and the distance dimension (vertical distance) T between the top vertex D1 of the virtual circle D and the flat portion 111 is set. However, it is preferable that it is 0.3-2 mm.
Moreover, in the torch 21 in the present embodiment, it is more preferable that the angle θ1 formed by the first virtual straight line S1 and the second virtual straight line S2 is 5 to 10 °. Further, the vertical distance T between the vertex D1 and the flat portion 211 is more preferably 0.5 mm to 2 mm.

  As shown in FIG. 15, in the torch 21 in the present embodiment, when the dimension of the flat portion 211 in the bending direction H is L, and the dimension of the glass plate 1 in the bending direction H is L1, L is L1. The size is preferably 2 to 10%.

  Moreover, as shown in FIG. 9, it is preferable that elliptic arc angle (theta) 2 of the outer peripheral surface of the glass plate 4 after a bending process is 115 degrees or more, More preferably, it is 120-180 degrees. The elliptical arc length L2 of the outer peripheral surface of the glass plate 4 after bending is preferably 300 mm or more, more preferably 400 to 1500 mm.

  As described above, the glass plate 1 is placed on the upper end of the torch 11 or 21 having a curved surface, and then softened by heat treatment and bent into an arc shape or an elliptic arc shape in the cross-sectional view. And the flat part 111 * 211 for mounting the glass plate 1 is previously formed in the said upper end part, and the mounting process of mounting the glass plate 1 in the flat part 111 * 211 of the torch 11 * 21, And a deformation step of softening and bending the glass plate 1 placed on the flat portions 111 and 211 by heating.

According to this, by forming the flat portions 111 and 211 on the torch 11 and 21, it becomes easy to understand the place where the glass plate 1 is placed on the torch 11 and 21. Thereby, the center position X of the glass plate 1 is matched with the center position Y of the flat portions 111 and 211, and the work of accurately placing the glass plate 1 on the toches 11 and 21 can be easily performed.
Further, by placing the glass plate 1 on the flat portions 111 and 211, the contact area between the glass plate 1 and the toches 11 and 21 can be increased, and the glass plate 1 is mounted on the flat portions 111 and 211. Since it supports, it becomes possible to support the glass plate 1 stably. Thereby, it is possible to prevent the glass plate 1 from being displaced due to vibration or the like when the torch 11 or 21 is transported with the glass plate 1 placed on the torch 11 or 21. Thereby, it becomes possible to improve the precision of the shape of the product manufactured by bending the glass plate 1.

  Moreover, in the said deformation | transformation process, the glass plate 1 is bent so that it may curve, forming the clearance gap Z between the flat parts 111 * 211 of the torch 11 * 21.

  According to this, it becomes possible to bend the glass plate 1 into a predetermined arc shape or elliptic arc shape having the shape of the molding surface of the torch 11 or 21.

1 Glass plate 2.4 Glass plate after bending 11.21 Tochi 111.211 Flat part

Claims (9)

A plate that is placed on the upper end of a mold having a curved surface and then softened by heat treatment and bent into a circular arc shape or an elliptical arc shape in a sectional view in a vertical plane perpendicular to the plate thickness direction of the mold. A method of forming a shape,
A flat part for placing the plate-like object is formed in the upper end part in advance,
A placing step of placing the plate-like object on the flat portion of the mold;
A deformation step of softening and bending the plate-like object placed on the flat part by heating;
Characterized by comprising,
A method for forming a plate-like product. In the deformation step,
The plate-like object is bent so as to be curved while forming a gap with the flat portion of the mold.
The method for forming a plate-like object according to claim 1, wherein The plate is crystalline glass,
In the deformation step, bending and crystallization of the crystalline glass is performed.
The method for forming a plate-like material according to claim 1 or 2, characterized in that The weight of the plate-shaped object is 2 kg or more,
In the deformation step,
The plate-like object is bent into the circular arc shape or elliptic arc shape in cross-section when the arc angle or elliptical arc angle of the outer circumferential surface is 115 ° or more, and the arc length or elliptical arc length of the outer circumferential surface is 300 mm or more,
The method for forming a plate-like object according to any one of claims 1 to 3, wherein In the deformation step,
The heating temperature at the time of heating the plate-like material is set within the range of Tg to (Tg + 50) ° C. when the glass transition temperature is Tg.
The method for forming a plate-like object according to any one of claims 1 to 4, wherein: In the mold,
The molding surface is formed so as to follow an arc of a virtual circle in the sectional view,
The gap dimension between the upper end of the virtual circle and the flat portion is 0.3 mm or more and 2.0 mm or less,
The angle formed by the first virtual straight line connecting the center of the virtual circle and one end of the flat portion and the second virtual straight line connecting the center of the virtual circle and the other end of the flat portion is 2 ° or more and 10 ° or less,
The method for forming a plate-like product according to any one of claims 1 to 5, wherein In the mold,
The molding surface is formed along the elliptical arc of a virtual ellipse in the cross-sectional view,
The gap dimension between the upper end of the virtual ellipse and the flat part is 0.3 mm or more and 2.0 mm or less,
The angle formed by the first virtual straight line connecting the center of the virtual ellipse and one end of the flat portion and the second virtual straight line connecting the center of the virtual ellipse and the other end of the flat portion is 2 ° or more and 10 ° or less,
The method for forming a plate-like product according to any one of claims 1 to 5, wherein In the mold,
The width dimension of the flat part in the bending direction of the plate-like object is 2% or more and 10% or less of the width dimension of the plate-like object in the bending direction.
The method for forming a plate-like object according to any one of claims 1 to 7, wherein A mold for molding a plate-shaped object along a molding surface,
A flat surface provided at the upper end,
A first molding surface extending curvedly downward from one end of the flat surface in a cross-sectional view in a vertical plane perpendicular to the plate thickness direction of the mold;
A second molding surface extending downward and curved from the other end of the flat surface in the cross-sectional view,
The mold according to claim 1, wherein the first molding surface and the second molding surface are formed so as to be along an arc of a virtual circle or an elliptical arc of a virtual ellipse in the sectional view.

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