JP2018193258A - Manufacturing method of glass plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a glass plate capable of forming a mark including continuous lines forming a closed region, and to provide a glass plate for a vehicle. SOLUTION: A through hole 21 is formed, and a substrate 1 having a first surface and a second surface is arranged in the through hole 21 with a gap between the inner peripheral edge of the through hole 21 and the first surface. A mold having a second surface and a plate-shaped mold 2 having a second surface are arranged on the same plane by a connecting member 3 that connects the plate-shaped mold material 2 so as to straddle the gap so that the connecting member 3 does not come into contact with the same plane. A step of preparing a sand blasting device having a nozzle capable of discharging a compressed fluid containing a sandy substance, and a step of arranging the mold 10 so that the first surface faces the glass plate. And at least a step of roughening the surface of the glass plate by spraying the compressed fluid from the nozzle of the sandblasting device onto the surface of the glass plate exposed from the gap of the mold 10. How to make a glass plate. [Selection diagram] Fig. 1

Description

  The present invention relates to a glass plate manufacturing method and a vehicle glass plate.

  Conventionally, various marks such as a manufacturer, a model number, a standard, and an approval are formed on the surface of a glass plate used for automobiles, buildings, and the like. Such a mark is often formed by sandblasting (for example, Patent Document 1). Sand blasting is performed as follows. First, a mold is prepared in which a through-hole shaped like a character or the like is formed. And this metal mold | die is arrange | positioned on the surface of a glass plate, and the compressed gas containing sand is sprayed with respect to the surface of the glass plate exposed from a through-hole. Thereby, the surface of the glass plate is roughened by sand, and a mark corresponding to the shape of the through hole can be formed on the surface of the glass plate.

JP-A-7-323726

  By the way, there are various marks formed on the surface of the glass plate. For example, there is a mark in which a character indicating a standard or the like is surrounded by a ring-shaped figure. As shown in FIG. 9, depending on the standard, a continuous ring 300 may be required around the character 200. In order to form such a mark by sandblasting, a circular first through hole is formed in a mold, and a circular mold material in which a second through hole indicating a character is formed is disposed inside the first through hole. However, it is necessary to form a ring-shaped gap between the first through hole and the mold material. However, in this case, it is necessary to prevent the inner peripheral edge of the first through hole from contacting the outer peripheral edge of the mold material, and thus the mold material cannot be supported. Therefore, conventionally, such ring-shaped marks could not be formed by sandblasting.

  On the other hand, for example, it is conceivable to form a mark by forming a mark with a laser or applying a material such as ceramic by printing or the like, but these have a problem of high cost. In particular, when the method of applying ceramic is applied to, for example, a side glass that slides in a vehicle, there is a problem that the number of steps increases and the cost increases.

  The present invention has been made to solve the above-described problem. A glass plate manufacturing method capable of forming a mark including a continuous line forming a closed region by sandblasting, and a vehicle glass plate are provided. The purpose is to provide.

Item 1. A through hole is formed, and the first surface and the second surface are disposed between the substrate having the first surface and the second surface and the inner peripheral edge of the through hole in the through hole. A plate-shaped mold material, and a connecting member that couples the mold material to the outside of the through hole in the substrate so as to straddle the gap, and the first surface of the substrate and the first surface of the mold material, Preparing a mold that is arranged on the same plane and configured so that the connecting member does not contact the same plane;
Providing a sand blasting device having a nozzle capable of discharging a compressed fluid containing sand,
Placing the mold such that the first surface faces the glass plate;
At least the step of roughening the surface of the glass plate by spraying the compressed fluid from the nozzle of the sandblasting device onto the surface of the glass plate exposed from the gap of the mold; and
A method for producing a glass plate.

Item 2. The connecting member is formed of at least one frame member,
The frame is
A first portion rising from the second surface of the mold material;
A second part that stands up from the second surface of the substrate and is disposed on the side away from the nozzle across the first part;
A third part connecting the first part and the second part;
The manufacturing method of the glass plate of claim | item 1 equipped with these.

Item 3. Item 3. The method for manufacturing a glass plate according to Item 2, wherein the frame is formed in a plate shape.

Item 4. The manufacturing method of the glass plate of claim | item 2 or 3 arrange | positioned so that the surface which comprises thickness in the said 1st site | part and 3rd site | part may face the discharge outlet side of the said nozzle.

Item 5. Item 5. The method for producing a glass plate according to Item 2 to 4, wherein the connecting member has two or more frames, and the two or more frames are connected to each other.

Item 6. The manufacturing method of the glass plate of Claim 2 to 5 whose thickness of the said base material is 0.1 mm or more and 5 mm or less.

Item 7. Item 7. The method for producing a glass plate according to any one of Items 1 to 6, wherein the height of the connecting member from the substrate is 1 mm or more and 50 mm or less.

Item 8. Item 8. The method for producing a glass plate according to any one of Items 1 to 7, wherein the substrate and the connecting member are formed of the same material.

Item 9. The sandblasting device includes a base having a contact surface with which the glass plate contacts,
The base has a mounting hole in which the mold is disposed,
In the roughening step, the glass plate is pressed against the contact surface, and the glass plate on the contact surface is exposed to a portion exposed through the mounting hole and the mold. Item 9. The method for producing a glass plate according to any one of Items 1 to 8, wherein the compressed fluid is sprayed.

Item 10. Item 10. The method for producing a glass plate according to any one of Items 1 to 9, wherein the mold substrate is disposed at a distance from the glass plate.

Item 11. Item 11. The method for producing a glass plate according to any one of Items 1 to 10, wherein the glass plate is a side glass for a vehicle.

Item 12. Item 12. The method for producing a glass plate according to any one of Items 1 to 11, wherein the glass plate is a sliding glass for a vehicle.

Item 13. The glass plate to which the compressed fluid is sprayed is formed in a flat plate shape,
Item 13. The method for producing a glass plate according to any one of Items 1 to 12, further comprising a step of heating the flat glass plate to 400 to 600 ° C to perform bending.

Item 14. A mold for forming a mark on the surface of a glass plate using a sandblasting device having a nozzle capable of discharging a compressed fluid containing sand,
A substrate having a through hole formed therein and having a first surface and a second surface;
Within the through hole, a plate-shaped mold material that is disposed with a gap between the inner periphery of the through hole and having a first surface and a second surface;
A connecting member for connecting the outside of the through hole in the substrate and the mold material so as to straddle the gap;
With
A sandblasting mold, wherein the first surface of the substrate and the first surface of the mold member are arranged on the same plane, and the connecting member is not in contact with the same plane.

Item 15. A first region and a second region surrounded by the first region and adjacent to the first region;
A third region adjacent to the outside of the first region;
With
The glass plate for vehicles, wherein the surface roughness R1 of the first region, the surface roughness R2 of the second region, and the surface roughness R3 of the third region satisfy R2 = R3 <R1.

Item 16. A first region and a second region surrounded by the first region and adjacent to the first region;
With
The glass plate for vehicles, wherein the minimum value R1min of the surface roughness of the first region and the minimum value R2min of the surface roughness of the second region satisfy R1min> R2min.

Item 17. A first region and a second region surrounded by the first region and adjacent to the first region;
With
The surface roughness R1 of the first region and the surface roughness R2 of the second region satisfy R2 <R1,
The glass plate for vehicles in which the maximum value R1max and the minimum value R1min of the surface roughness of the first region satisfy R1max−R1min <20 μm.

Item 18. A first region and a second region surrounded by the first region and adjacent to the first region;
With
A glass plate for a vehicle, wherein the standard deviation σR1 of the surface roughness of the first region and the standard deviation σR2 of the surface roughness of the second region satisfy σR1> σR2.

Item 19. Item 19. The glass plate for a vehicle according to any one of Items 15 to 18, wherein the surface of the first region is sandblasted.

Item 20. Item 20. The glass plate for a vehicle according to any one of Items 15 to 19, which is slidably supported in the vehicle.

  According to the present invention, a mark including a continuous line forming a closed region can be formed.

It is a perspective view which shows one Embodiment of the metal mold | die for sandblasting of this invention. It is a top view of FIG. It is the sectional view on the AA line of FIG. It is a schematic block diagram which shows an example of a sandblasting apparatus. It is a figure which shows the example of formation of the mark by a sandblasting apparatus. It is a figure which shows the example of the mark formed on a glass plate with the metal mold | die of FIG. It is a top view which shows the other example of the metal mold | die of FIG. It is the BB sectional view taken on the line of FIG. It is a figure which shows the example of the mark formed on a glass plate.

  Hereinafter, an embodiment of a glass plate manufacturing method according to the present invention will be described with reference to the drawings.

<1. Overview of glass plate manufacturing method>
The manufacturing method of the glass plate which concerns on this embodiment is a method for forming a character, a number, a figure, etc. on the surface of a glass plate by sandblasting. In the present invention, these letters, numbers, figures and the like are collectively referred to as marks. These marks are mainly for displaying the origin of the glass plate such as manufacturer, model number, standard, certification, etc., but are not limited to this, and form design marks. May be used for Therefore, the target glass plate is not particularly limited, and can be applied to a moving body such as an automobile, a train or an aircraft, a glass plate used for a building or the like, and any surface of the glass plate. Can also form marks. As such a glass plate, for example, float glass can be used.

<2. Sandblasting mold>
Next, a sandblasting mold used in the glass plate manufacturing method according to the present embodiment will be described with reference to FIGS. 1 is a perspective view of a sandblasting mold, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG.

  As shown in FIGS. 1 to 3, the mold 10 according to the present embodiment includes a circular substrate 1. Hereinafter, in this substrate 1, a surface facing the glass plate 5 is referred to as a first surface 101, and a surface opposite to the first surface 101 is referred to as a second surface 102. A plurality of first through holes 11 are formed in the substrate 1 in the form of marks such as predetermined characters. In addition, a circular second through hole 12 is formed in the substrate 1 at a position off the center, and a plate-shaped mold material 2 is disposed in the second through hole 12. The mold 2 and the substrate 1 are connected by a connecting member 3. Also in the mold material 2, the surface facing the glass plate 5 is referred to as a first surface 201, and the opposite surface is referred to as a second surface 202. The first surface 101 of the substrate 1 and the first surface 201 of the mold 2 are on the same plane.

  The mold material 2 is formed in a circular shape having an outer diameter smaller than the inner diameter of the second through hole 12, and is disposed inside the second through hole 12 with a gap. That is, the mold material 2 is arranged so that a gap is formed over the entire circumference between the inner periphery of the second through-hole 12 and the outer periphery of the mold material 2. Further, the mold member 2 is formed with a third through hole 21 shaped like a mark such as a predetermined character. In addition, the shape of the 1st-3rd through-holes 11, 12, and 21 is an example to the last.

  The connecting member 3 includes a pair of connecting pieces (frame members) 31 formed in a plate shape, and connecting pieces 32 that connect the connecting pieces 31. Each connecting piece 31 is connected to the mold member 2 and rises almost vertically on the second surface 102 side of the substrate 1, and the substrate 1 from a position radially outward from the second through hole 12 in the substrate 1. A second portion 312 that rises substantially vertically on the second surface 102 side, and a third portion 313 that connects the tips of the first portion 311 and the second portion 312, and these three portions are integrated. Is formed. That is, each connecting piece 31 is formed in a U shape so as to rise on the second surface 102 side of the substrate 1. The two connecting pieces 31 are arranged in parallel in the circumferential direction of the substrate 1 at a predetermined interval. In addition, the number of the connection pieces 31 is not particularly limited, and may be 1 or 3 or more. However, if it is 2 or more, the strength can be increased.

  Further, the first part 311 and the second part 312 of each connecting piece 31 are arranged so that the surfaces constituting the thickness face the inner side in the radial direction of the substrate 1, that is, the center side. This thickness D can be, for example, 0.1 mm or more and 5 mm or less. Preferably, it is 0.3 mm or more and 2 mm or less. This is because if the thickness is 0.3 mm or less, the life is shortened because the rigidity is insufficient and the film is easily deformed. On the other hand, if the thickness is 2 mm or more, a shadow portion that is difficult to hit with sand is formed, and the mark becomes unclear. The width of the first part 311, that is, the length in the radial direction is smaller than the width of the second part 312. Furthermore, the height H from the board | substrate of each connection piece 31 can be 1 mm or more and 50 mm or less, for example. Preferably, it is 3 mm or more and 30 mm or less. If it is 3 mm or less, each connecting piece 31 is too small to be welded, and if it is 30 mm or more, it is bulky when storing the mold and difficult to store. The “surface constituting the thickness” means a surface having the smallest thickness when viewed from a direction (for example, the direction X in FIG. 2) perpendicular to the direction (vertical direction) in which the connecting piece 31 extends. Say.

  The pair of connecting pieces 31 formed in this way are connected by a plate-like connecting piece 32. More specifically, the connecting pieces 31 are connected so as to extend in the circumferential direction of the substrate 1 at the distal end portion of the second portion 312 of each connecting piece 31.

  Although the material which comprises the above metal mold | die 10 is not specifically limited, For example, stainless steel etc. can be used. The mold is a consumable item because it is worn out by sandblasting, and the edge of the through-hole is deformed and the mark becomes unclear, resulting in a lifetime. Accordingly, the material constituting the mold is preferably inexpensive. Moreover, since the board | substrate 1, the mold material 2, and the connection member 3 are connected by welding, the material suitable for welding is preferable. For example, ferritic stainless steel is particularly preferable because it is inexpensive and has excellent weldability. Moreover, although all the members which comprise the metal mold | die 10 may be comprised with the same material, they can also be formed with a different material. However, when the mold 10 is formed of the same material, for example, the connecting member 3 can be easily joined to the substrate 1 and the mold material 2 by welding or the like, and the joining strength can be increased.

<2. Sandblasting equipment>
A well-known thing can be used for a sandblasting apparatus. Hereinafter, an example of a sandblasting apparatus will be described. As shown in FIG. 4, the sandblasting device includes a table (base) 6 that supports the glass plate 5 and a nozzle 63 that is disposed below the glass plate 5 and discharges a gas containing sand. And the glass plate 5 supported by the support part 62 which has a suction cup is arrange | positioned above the table 6, and the glass plate 5 is arrange | positioned on the table 6 by lowering the support part 62. FIG. . The table 6 is formed with an attachment hole 61 for attaching the mold 10. The attachment hole 61 communicates the top and bottom of the table 6, and a part of the glass plate 5 is exposed below the table 6 through the mold 10 attached to the attachment hole 61. The mold 10 is attached to the attachment hole 61 so that the connecting member 3 faces downward, but the first surface 101 of the substrate 1 is not in contact with the glass plate 5 so as not to damage the glass plate 5. Be placed.

  In this apparatus, a compressed gas containing a sand-like material (sand or the like) is jetted upward from the nozzle 63 toward the mounting hole 61. Therefore, the nozzle 63 is connected to a compressor (not shown) and a container (not shown) in which sandy objects are stored. Further, the nozzle 63 is supported so that the discharge port 631 at the upper end portion can rotate so as to draw a circle around a position slightly above the lower end portion. Thereby, sand can be sprayed over the whole attachment hole 61 (the whole mold 10).

<3. Mark formation method>
First, as shown in FIG. 5, the support portion 62 is lowered and the flat glass plate 5 is disposed on the table 6. At this time, the glass plate 5 is pressed against the table 6 by the support portion 62 so that the glass plate 5 does not move. Next, while rotating the nozzle 63, the compressed gas is discharged from the discharge port 631 together with the sand toward the mold 10 attached to the attachment hole 61. Thereby, a sand-like thing is sprayed on the surface of the glass plate 5 exposed from the 1st-3rd through-holes 11, 12, and 21 of the metal mold | die 10, and it roughens. As a result, as shown in FIG. 6, marks corresponding to the shapes of the first to third through holes 11, 12, and 21 are formed on the surface of the glass plate 5.

  By the way, there are various marks such as manufacturer, model number, standard, approval, etc., formed by the sandblasting process. In recent years, the number of marks formed on one glass plate has increased, the size of the marks has decreased, and there is a demand for forming marks with higher definition. On the other hand, since the vehicle side glass (for example, sliding glass and fixed glass) having a relatively small size is light, there is a possibility that the glass plate is moved by the pressure of sandblasting. Therefore, in order to prevent the glass plate from moving and rubbing characters, it is preferable to perform the sandblasting process while pressing the glass plate 5 from above as described above.

  Here, the arithmetic average roughness Ra which is the surface roughness of the roughened portion (the portion where the mark 500 or the like is formed) in the glass plate 5 is 0.1 to 20 μm, preferably 0.5 to 5 μm. The arithmetic average roughness Ra of the portion that is not roughened can be 0.5 to 10 μm. At this time, the arithmetic average roughness Ra can be measured, for example, using a surface roughness meter (α-STEP500) manufactured by TENCOR at a measurement length of 500 μm and a scanning speed of 50 μm / s. The ring-shaped mark 500 constitutes the first region of the present invention, the region not roughened inside the second region is the second region, and the region not roughened outside the mark 500 is the third region. Configure the area. If the arithmetic average roughnesses of these regions are R1, R2, and R3, respectively, the arithmetic average roughness of the roughened mark 500 is the largest, so that R2 = R3 <R1 holds. R1, R2, and R3 may be any point in each region, or may be an average of arbitrary 10 points.

  In particular, if the minimum values of R1 and R2 are R1min and R2min, respectively, it is preferable to satisfy R1min> R2min. Further, when the maximum value of R1 is R1max, it is preferable that R1max−R1min <20 μm is satisfied. Furthermore, when variation of R1, R2, that is, standard deviation is σR1, σR2, it is preferable that σR1> σR2 is satisfied. In this case, the arithmetic average roughness Ra is measured at 10 points where the measurement points do not overlap with the measurement method described above, and the standard deviation is calculated from these measurement data. On the other hand, for the second region, the arithmetic average roughness Ra is measured for 10 points of the unroughened portion, and the standard deviation is calculated from these measurement data.

  In addition, when this glass plate 5 is used as a glass plate for vehicles, after that, a shielding layer is laminated on the periphery with ceramic or the like, and then bending is performed as necessary. Although the method of bending is not particularly limited, for example, after the glass plate 5 is heated, the glass plate 5 is bent by press molding, or the peripheral edge of the glass plate 5 is supported and heated. The glass plate 5 can also be bent. In addition, the heating temperature of the glass plate 5 can be 400-600 degreeC, for example.

<4. Features>
In the manufacturing method of the glass plate which concerns on this embodiment, the metal mold | die 10 which connected the board | substrate 1 and the type | mold material 2 arrange | positioned at the 2nd through-hole 12 formed in the board | substrate 1 by the connection member 3 is used. The connecting member 3 is not formed so as to fill a gap between the inner peripheral edge of the second through-hole 12 and the outer peripheral edge of the mold member 2, and is formed so as to straddle the gap on the second surface 102 side. Therefore, a continuous ring-shaped gap can be formed between the inner peripheral edge of the second through hole 12 and the outer peripheral edge of the mold member 2. As a result, by spraying sand into the gap, a continuous ring-shaped mark 500, that is, a mark 500 by a continuous line forming a closed region can be formed on the surface of the glass plate 5. Therefore, according to the method according to the present embodiment, a continuous ring-shaped mark can be formed at low cost by sandblasting.

  The connecting piece 31 constituting the connecting member 3 is formed of a plate material and is disposed so that the thickness direction faces the discharge port 631 side of the nozzle 63. That is, since the connecting piece 31 has the smallest thickness directed toward the nozzle 63, the connecting piece 31 can prevent the flow of sand discharged from the nozzle 63 from being hindered. Therefore, since the sand-like object can be reliably sprayed against the ring-shaped gap, the surface of the glass plate 5 can be reliably roughened to form a mark. Moreover, the connection member 3 can be comprised at low cost by forming the connection piece 31 in plate shape.

  Further, as shown in FIG. 3, the second portion 312 position and the third portion 32 of the connecting member 3 are both arranged at positions away from the nozzle 63 with the first portion 311 interposed therebetween. Therefore, this configuration can also prevent the flow of sand-like material discharged from the nozzle 63 from being hindered. From this viewpoint, the second part 312 and the third part 32 do not have to be plate-shaped.

<5. Modification>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning. The following modifications can be combined as appropriate.

<5-1>
In the mold 10 of the above embodiment, the first to third through holes 11, 12, and 21 are formed. However, it is sufficient that at least the second through hole 12 is formed, and the other through holes 11 and 21 are What is necessary is just to provide suitably as needed. Further, the shape of the substrate 1 may be other than a circle.

  The shapes of the second through hole 12 and the mold material 2 are not particularly limited, and may be other than circular. Moreover, since the continuous clearance gap should just be formed between the inner periphery of the 2nd through-hole 12, and the outer periphery of the type | mold material 2, the shape of the 2nd through-hole 12 and the type | mold material 2 may differ. For example, the second through hole 12 may be rectangular and the mold member 2 may be circular. Moreover, there may be a plurality of second through holes 12 and mold materials 2.

<5-2>
The configuration of the connecting member 3 is not particularly limited as long as the mold 2 and the substrate 1 are connected. Therefore, it can be in various forms such as a rod shape and a pipe shape other than the plate material. Further, the connecting member 3 does not have to rise straight from the substrate 1 and can be appropriately inclined depending on, for example, the position of the nozzle 63 and the direction of spraying the sandy object. Moreover, in the said embodiment, although 2nd part 312 rank and the 3rd site | part 32 of the connection member 3 are all arrange | positioned in the position away from the nozzle 63 on both sides of the 1st site | part 311, except this positional relationship. The connection member 3 can also be comprised so that it may become. Further, the number of connecting members 3 is not particularly limited.

<5-3>
The connecting member 3 can be configured as shown in FIGS. 7 and 8 in addition to the configuration in which the connecting member 3 stands on the second surface 102, 202 side of the mold 10 as in the above embodiment. In the example of the figure, the connecting member 3 is disposed in the gap between the inner peripheral edge of the second through hole 12 and the mold material 2. However, as shown in FIG. 8, the connecting member 3 is disposed on the second surfaces 102 and 202 side of the substrate 1 and the mold material 2, but is not in contact with the same plane with the first surfaces 101 and 201. A space is formed between this plane. Even if it is such an aspect, a sandy material will enter into the lower side of the connection member 3, and a glass plate can be roughened. Moreover, such a connection member 3 can be provided in several places. In this aspect, since at least a part of the connecting member 3 has only to be disposed in the gap between the inner peripheral edge of the second through-hole 12 and the mold member 2, the connecting member 3 protrudes toward the second surfaces 102 and 202. Also good. However, when this aspect is adopted, the connecting member 3 is preferably as small as possible.

<5-4>
The sand blasting device shown in the above embodiment is an example, and any device having a structure for spraying at least a sand-like material sprayed from a nozzle onto a mold can be used. Therefore, for example, even if it is the structure which a nozzle does not move, what is necessary is just to be able to spray a sand-like object on the through-hole of a metal mold | die.

  In the said embodiment, although the glass plate 5 is arrange | positioned on the upper surface of the table 6 and the compressed gas is sprayed from the lower side of the table 6, it is not limited to this. For example, the glass plate 5 may be brought into contact with the base of the table 6 or the like from below, and compressed gas may be blown from above. Further, the mold 10 is preferably not brought into contact with the glass plate 5 so as not to damage the glass plate 5, but can also be brought into contact.

<5-5>
In the said embodiment, although the gas containing a sand-like substance is sprayed on a glass plate, gas is not specifically limited. However, air is preferable from the viewpoint of cost. In addition to gas, liquid can also be used.

<5-6>
In the glass plate 5, the area to be roughened is not particularly limited. In the above embodiment, the first, second, and third areas described above are roughened, but at least the first area is roughened. It is only necessary that the surface is roughened, and in other regions, at least a part or the entire surface may be roughened. Further, sandblasting can be performed so that the surface roughness of each region is different.

<5-7>
Although the glass plate used as object is not specifically limited as mentioned above, For example, it can apply preferably to various glass plates, such as fixed glass for vehicles, sliding glass, a windshield, side glass, a rear glass. In particular, a glass plate that is slidably supported by a vehicle is not formed with a shielding layer made of ceramic or the like, so that a mark cannot be formed using the shielding layer. Therefore, it is particularly advantageous to employ the mark forming method of the present invention for such a sliding glass plate. Also, a mark can be formed on a glass plate having a curved surface other than a flat glass plate by the method of the present invention.

10 Mold 1 Substrate 12 Second through-hole 2 Mold material 3 Connecting member 5 Glass plate

Claims (20)

A through hole is formed, and the first surface and the second surface are disposed between the substrate having the first surface and the second surface and the inner peripheral edge of the through hole in the through hole. A plate-shaped mold material, and a connecting member that couples the mold material to the outside of the through hole in the substrate so as to straddle the gap, and the first surface of the substrate and the first surface of the mold material, Preparing a mold that is arranged on the same plane and configured so that the connecting member does not contact the same plane;
Providing a sand blasting device having a nozzle capable of discharging a compressed fluid containing sand,
Placing the mold such that the first surface faces the glass plate;
At least the step of roughening the surface of the glass plate by spraying the compressed fluid from the nozzle of the sandblasting device onto the surface of the glass plate exposed from the gap of the mold; and
A method for producing a glass plate. The connecting member is formed of at least one frame member,
The frame is
A first portion rising from the second surface of the mold material;
A second part that stands up from the second surface of the substrate and is disposed on the side away from the nozzle across the first part;
A third part connecting the first part and the second part;
The manufacturing method of the glass plate of Claim 1 provided with these.   The method for manufacturing a glass plate according to claim 2, wherein the frame member is formed in a plate shape.   The manufacturing method of the glass plate of Claim 2 or 3 arrange | positioned so that the surface which comprises thickness in the said 1st site | part and a 3rd site | part may face the discharge outlet side of the said nozzle.   The method for producing a glass plate according to claim 2, wherein the connecting member has two or more of the frames, and the two or more frames are connected to each other.   The manufacturing method of the glass plate of Claim 2 to 5 whose thickness of the said base material is 0.1 mm or more and 5 mm or less.   The manufacturing method of the glass plate in any one of Claim 1 to 6 whose height from the said board | substrate of the said connection member is 1 mm or more and 50 mm or less.   The said board | substrate and the said connection member are the manufacturing methods of the glass plate in any one of Claim 1 to 7 formed with the same material. The sandblasting device includes a base having a contact surface with which the glass plate contacts,
The base has a mounting hole in which the mold is disposed,
In the roughening step, the glass plate is pressed against the contact surface, and the glass plate on the contact surface is exposed to a portion exposed through the mounting hole and the mold. The manufacturing method of the glass plate in any one of Claim 1 to 8 which sprays the said compressed fluid.   The method for producing a glass plate according to claim 1, wherein the mold substrate is disposed at a distance from the glass plate.   The said glass plate is a manufacturing method of the glass plate in any one of Claim 1 to 10 which is a side glass for vehicles.   The said glass plate is a manufacturing method of the glass plate in any one of Claim 1 to 11 which is the sliding glass for vehicles. The glass plate to which the compressed fluid is sprayed is formed in a flat plate shape,
The manufacturing method of the glass plate in any one of Claim 1 to 12 further equipped with the step which heats the said flat glass plate to 400-600 degreeC, and performs bending shaping | molding. A mold for forming a mark on the surface of a glass plate using a sandblasting device having a nozzle capable of discharging a compressed fluid containing sand,
A substrate having a through hole formed therein and having a first surface and a second surface;
Within the through hole, a plate-shaped mold material that is disposed with a gap between the inner periphery of the through hole and having a first surface and a second surface;
A connecting member for connecting the outside of the through hole in the substrate and the mold material so as to straddle the gap;
With
A sandblasting mold, wherein the first surface of the substrate and the first surface of the mold member are arranged on the same plane, and the connecting member is not in contact with the same plane. A first region and a second region surrounded by the first region and adjacent to the first region;
A third region adjacent to the outside of the first region;
With
The glass plate for vehicles, wherein the surface roughness R1 of the first region, the surface roughness R2 of the second region, and the surface roughness R3 of the third region satisfy R2 = R3 <R1. A first region and a second region surrounded by the first region and adjacent to the first region;
With
The glass plate for vehicles, wherein the minimum value R1min of the surface roughness of the first region and the minimum value R2min of the surface roughness of the second region satisfy R1min> R2min. A first region and a second region surrounded by the first region and adjacent to the first region;
With
The surface roughness R1 of the first region and the surface roughness R2 of the second region satisfy R2 <R1,
The glass plate for vehicles in which the maximum value R1max and the minimum value R1min of the surface roughness of the first region satisfy R1max−R1min <20 μm. A first region and a second region surrounded by the first region and adjacent to the first region;
With
A glass plate for a vehicle, wherein the standard deviation σR1 of the surface roughness of the first region and the standard deviation σR2 of the surface roughness of the second region satisfy σR1> σR2.   The glass plate for a vehicle according to any one of claims 15 to 18, wherein a surface of the first region is subjected to sandblasting.   The glass plate for vehicles according to any one of claims 15 to 19, which is slidably supported in the vehicle.