WO2023079991A1 - 楔形ガラスの製造方法 - Google Patents

楔形ガラスの製造方法 Download PDF

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Publication number
WO2023079991A1
WO2023079991A1 PCT/JP2022/039405 JP2022039405W WO2023079991A1 WO 2023079991 A1 WO2023079991 A1 WO 2023079991A1 JP 2022039405 W JP2022039405 W JP 2022039405W WO 2023079991 A1 WO2023079991 A1 WO 2023079991A1
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WO
WIPO (PCT)
Prior art keywords
glass
wedge
wedge angle
management position
width direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/039405
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English (en)
French (fr)
Japanese (ja)
Inventor
啓介 上垣内
準一郎 加瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to CN202280073956.7A priority Critical patent/CN118251369A/zh
Priority to JP2023557951A priority patent/JPWO2023079991A1/ja
Publication of WO2023079991A1 publication Critical patent/WO2023079991A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
    • C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
    • C03B33/037—Controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors

Definitions

  • the present invention relates to a method for manufacturing wedge-shaped glass.
  • the sheet glass manufactured by the float method is generally flat sheet glass with little thickness deviation.
  • HUD head-up display
  • the use of wedge-shaped glass with a non-uniform thickness makes it difficult for the driver to can reduce the double image that is a problem when visually recognizing the scenery outside the vehicle or the information displayed by the HUD.
  • a method for producing wedge-shaped glass a plurality of top rolls are brought into contact with one end of a glass ribbon traveling on a molten metal bath (float bath), and the cross section in the width direction orthogonal to the traveling direction is convex, concave, or tapered.
  • a method of obtaining a wedge-shaped glass product part by molding a glass base plate as a mold and cutting the glass base plate has been studied (see Patent Documents 1 to 3, for example).
  • the position of the glass base plate in the width direction changes. Therefore, the position in the width direction where the glass base plate is cut also fluctuates, and the wedge angle and plate thickness of the obtained glass product part also fluctuate. As a result, the wedge angle of the wedge-shaped glass cannot be maintained within a predetermined range.
  • the HUD display area when the wedge angle in the area of the wedge-shaped glass used as the HUD (hereinafter sometimes referred to as the HUD display area) cannot be maintained within a predetermined range, it is possible to effectively suppress double images in the HUD display area. I can't do it.
  • a glass base plate having a plate thickness change portion along the width direction is conveyed by a plurality of transfer rolls, and a longitudinal cutting line is formed in the longitudinal direction of the glass base plate by a vertical cutter.
  • a horizontal line is formed in the width direction of the glass base plate by a crossing machine, and a bending stress is applied to the glass base plate by a horizontal folding machine, thereby cutting the glass base plate along the horizontal line.
  • a glass member is formed, and a bending stress is applied to the glass member by a vertical folding machine, thereby cutting the glass member along the vertical cutting line, dividing unnecessary portions, and forming a wedge-shaped glass product portion.
  • a method for manufacturing wedge-shaped glass characterized in that the wedge angle at the management position X is controlled such that the difference from the ideal wedge angle at the predetermined management position X is within a predetermined range. be.
  • the longitudinal cutter can be controlled based on the wedge angle at the management position X. Therefore, a wedge-shaped glass product portion can be cut out from an appropriate position on the glass plate so that the wedge angle at the management position X is within a predetermined range.
  • FIG. 1(a) to 1(c) are cross-sectional views in the width direction of a glass base plate for wedge-shaped glass
  • FIG. 1(a) is an example of a convex type
  • FIG. 1(b) is an example of a concave type
  • FIG. 1(c) is an example of a tapered type.
  • FIG. 2 is a plan view showing the first embodiment of the wedge-shaped glass manufacturing method.
  • FIG. 3 is a plan view showing a second embodiment of the wedge-shaped glass manufacturing method.
  • 4A is a plan view showing a wedge angle detection method for the management position X.
  • FIG. 4B is a plan view showing a wedge angle detection method for the management position X.
  • FIG. 4C is a plan view showing a wedge angle detection method for the management position X.
  • FIG. 1(a) to 1(c) are cross-sectional views in the width direction of a glass base plate for wedge-shaped glass
  • FIG. 1(a) is an example of a convex type
  • FIG. 1(b) is an example of a concave type
  • FIG. 1(c) is an example of a tapered type.
  • FIG. 2 is a plan view showing the first embodiment of the wedge-shaped glass manufacturing method. The raw glass plate 10 is cut and inspected while being continuously transported in the wedge-shaped glass manufacturing apparatus 100 to become wedge-shaped glass product parts 11A and 11B.
  • the glass base plate 10 shown in FIG. 2 has a plate thickness change portion along the width direction of the glass base plate 10, that is, the B direction (hereinafter sometimes simply referred to as the width direction).
  • the plate thickness changing portion of the glass base plate 10 is obtained, for example, by bringing a plurality of top rolls into contact with one end of a glass ribbon traveling on a molten metal bath (float bath), and adjusting the peripheral speed and pressing force of the top rolls. can be molded with
  • the plate thickness change portion can also be adjusted by the temperature distribution in the width direction of the glass ribbon and the traveling speed of the glass ribbon.
  • the cross section in the width direction of the glass plate 10 is convex as shown in FIG. 1(a).
  • the glass base plate 10 includes ear portions 12A and 12B located on both sides in the width direction, a central portion 13 including the thickest region, and a first glass product positioned between the ear portions 12A and the central portion 13. It is composed of a portion 11A and a second glass product portion 11B located between the ear portion 12B and the central portion 13. As shown in FIG.
  • the glass product parts 11A and 11B are parts that will eventually become products.
  • the glass base plate may be a glass base plate 20 having a concave cross section in the width direction, as shown in FIG. 1(b).
  • the glass base plate 20 includes ear portions 22A and 22B located on both sides in the width direction, a center portion 23 including the thinnest region, and a first glass product located between the ear portions 22A and the center portion 23. It consists of a portion 21A and a second glassware portion 21B located between the ear portion 22B and the central portion 23. As shown in FIG.
  • the glass base plate may be a glass base plate 30 having a tapered cross section in the width direction, as shown in FIG. 1(c).
  • the raw glass plate 30 is composed of ear portions 32A and 32B located on both sides in the width direction, and a glass product portion 31 located between the ear portions 32A and 32B.
  • the glass base plate 20 or the glass base plate 30 can be similarly implemented.
  • the glass product portions 11A and 11B of the glass plate 10 correspond to the glass product portions 21A and 21B of the glass plate 20 and the glass product portion 31 of the glass plate 30 .
  • the ear portions 12A and 12B of the raw glass plate 10 correspond to the ear portions 22A and 22B of the raw glass plate 20 and the ear portions 32A and 32B of the raw glass plate 30, respectively.
  • the central portion 13 of the glass plate 10 corresponds to the central portion 23 of the glass plate 20 .
  • the glass base plate 10 molded so as to have a plate thickness change portion in the width direction is moved in the longitudinal direction of the glass base plate 10, that is, in the A direction (hereinafter simply referred to as the longitudinal direction) by a plurality of transport rolls 110 shown in FIG. is transported to The transport rolls 110 are arranged at a constant pitch distance along the transport path, and are rotated by being driven by a rotation driving means (not shown).
  • Vertical cutting lines L1 to L4 are scribe lines for separating the glass base plate 10 into glass product parts 11A and 11B, ear parts 12A and 12B, and the central part 13.
  • a vertical cutting line L1 is formed at the boundary between the glass product portion 11A and the ear portion 12A.
  • a vertical cutting line L2 is formed at the boundary between the glass product portion 11B and the ear portion 12B.
  • a vertical cutting line L3 is formed at the boundary between the glass product portion 11A and the central portion 13.
  • a vertical cutting line L4 is formed at the boundary between the glass product portion 11B and the central portion 13. As shown in FIG.
  • the vertical cutter 120 is capable of advancing and retreating in the plate thickness direction of the raw glass plate, that is, in the C direction (hereinafter sometimes simply referred to as the plate thickness direction) and moving in the width direction, and includes a plurality of cutters 121. ing. By advancing each cutter 121 toward the main surface of the glass (in the direction opposite to the C direction), the cutter 121 is brought into contact with the glass base plate 10 with a prescribed pressing force, and the glass base plate 10 is cut along the longitudinal cut line L1 to L4 is processed.
  • the positions of the longitudinal cutting lines L1 to L4 in the glass plate 10 in the width direction can be controlled by adjusting the positions of the cutters 121 in the width direction.
  • the transverse line L5 is a scribe line for cutting out the glass member 10P from the glass base plate 10.
  • the crossing machine 130 includes a cutter 131 that can move forward and backward in the plate thickness direction (direction C) and move in the plane direction perpendicular to the plate thickness direction.
  • a cutter 131 that can move forward and backward in the plate thickness direction (direction C) and move in the plane direction perpendicular to the plate thickness direction.
  • the cutter 131 is brought into contact with the glass base plate 10 with a prescribed pressing force.
  • a transverse line L ⁇ b>5 is processed in the width direction of the glass plate 10 .
  • the horizontal folding machine 140 is provided with a pressing roll (not shown) that can move forward and backward in the plate thickness direction.
  • the horizontal folding machine 140 presses the raw glass plate 10 with a pressing roll from below the raw glass plate 10, applies a bending stress along the longitudinal direction about the horizontal line L5, and bends along the horizontal line L5.
  • a glass base plate 10 is folded. As a result, the glass member 10P is cut out from the glass base plate 10. Next, as shown in FIG.
  • the glass member 10P cut out from the glass base plate 10 is moved from the transport roll 110 to the transport roll 111 having a width direction shorter than that of the transport roll 110 .
  • the first vertical folding machine 150 includes support rolls that support the tabs 12A and 12B of the glass member 10P from below in the C direction, and pressing projections that press from above (not shown).
  • the pressing projection and the support roll are movable in the width direction. Also, the support roll is rotatable in the longitudinal direction.
  • the first vertical folding machine 150 supports the ear portions 12A and 12B from the lower side in the C direction with support rolls and presses them from the upper side in the C direction with pressing projections, thereby reducing the bending stress along the width direction. and fold the ears 12A and 12B along the longitudinal cutting lines L1 and L2. As a result, a glass member 10Q having no ear portion is cut out from the glass member 10P.
  • the position in the width direction where the first vertical folding machine 150 applies bending stress to the glass plate 10 can be controlled by adjusting the positions in the width direction of the support rolls and the pressing projections.
  • the ear portions 12A and 12B separated from the glass member 10P can be removed from the conveying path as unnecessary portions by pulling them below the conveying rolls 111 having a short widthwise length.
  • the glass member 10Q that is cut out from the glass member 10P and does not have ear portions is moved from the transport roll 111 having a short widthwise length to the transport roll 110 .
  • the glass member 10Q having no ears conveyed by the conveying rolls 110 is applied with a bending stress by the second vertical folding machine 160 shown in FIG. It is divided into product portions 11A and 11B and a central portion 13 which is an unnecessary portion.
  • the second vertical folding machine 160 has a pressing roll (not shown) that can move forward and backward in the plate thickness direction and in the width direction.
  • the second vertical folding machine 160 presses the glass member 10Q with a pressing roll from below the glass member 10Q having no ear portion, and applies a bending stress along the width direction centering on the longitudinal cutting lines L3 and L4. and fold along vertical cut lines L3 and L4. Thereby, the glass product portions 11A and 11B are cut out from the glass member 10Q having no ear portion.
  • the position in the width direction where the second vertical folding machine 160 applies bending stress to the glass plate 10 can be controlled by adjusting the position in the width direction of the pressing rolls.
  • the separating device 170 is arranged between the two transport rolls 110 and has a separating roll or a separating projection (not shown).
  • the glass product portions 11A and 11B and the central portion 13 are passed over separating rolls or separating projections, thereby widening the distance between the members.
  • the positions in the width direction of the glass product parts 11A and 11B after passing through the separating device 170 can be controlled by adjusting the positions of the separating rolls or separating projections.
  • FIG. 4A is a plan view showing a wedge angle detection method for the management position X.
  • the management position X of the glass product portion 11A is located at a predetermined distance from one end E1 of the glass product portion 11A.
  • the management position X of the glass product portion 11B is located at a predetermined distance from one end E2 of the glass product portion 11B.
  • the wedge angles at the management position X of the glassware parts 11A and 11B are the thickness at the management position Y moved in the width direction from the management position X and the wedge angle at the management position Z moved in the width direction opposite to the management position Y from the management position X. It is calculated from the thickness and the distance between the management positions Y and Z in the width direction.
  • the wedge angle ⁇ at the management position X is calculated from the following relational expression (1).
  • ⁇ Wedge angle at management position X (unit: mrad)
  • T Y Plate thickness of the glass product part at control position Y (unit: mm)
  • T Z Plate thickness of the glass part at the control position Z (unit: mm)
  • d width direction distance between control position Y and control position Z (unit: mm)
  • the inspection device 180 includes four plate thickness measuring devices 181 movable in the width direction and a sensor 182, as shown in FIG. 4A.
  • a sensor 182 identifies the positions in the width direction of one end E1 of the glass product portion 11A and one end E2 of the glass product portion 11B. Based on the positions of one end E1 and one end E2, each plate thickness measuring device 181 is moved to the vicinity of control position Y and control position Z of glass product sections 11A and 11B, respectively, and the plate thickness at each control position is measured. As described above, the wedge angle at the management position X of the glass product parts 11A and 11B is calculated.
  • the wedge angle of the glass product portion 11A (or 11B) at the management position X detected by the inspection device 180 while being transported by the transport roll 110 is the movement of the glass product portion 11A (or 11B) by the transport roll 110. It is preferably within plus or minus 0.1 mrad with respect to the actual wedge angle at the management position X of the glass product portion 11A (or 11B), which is detected in the stopped state. Within plus or minus 0.1 mrad, the measurement accuracy of the wedge angle can be maintained during transportation.
  • the difference between the wedge angle and the actual wedge angle is preferably within plus or minus 0.05 mrad, more preferably within plus or minus 0.03 mrad. Note that this can also be applied to the second embodiment.
  • the widthwise distance between the management position Y and the management position Z is preferably 50 mm or more and 250 mm or less. If it is 50 mm or more, it is possible to suppress measurement errors due to vibration propagated from the transport roll 110 . If the distance is 250 mm or less, the control position Y and the control position Z where the plate thickness is measured are located at a short distance from the control position X, so the wedge angle at the control position X can be calculated with high accuracy. More preferably, the distance in the width direction between the management position Y and the management position Z is 70 mm or more and 230 mm or less. The distance in the width direction between the management position Y and the management position Z is appropriately selected according to the distance between the pitches of the transport rolls 110 and the transport speed. Note that this can also be applied to the second embodiment.
  • the management position X is located within the head-up display display area (hereinafter sometimes referred to as HUD display area). It is preferable to be located in the center of the head-up display display area. Note that this can also be applied to the second embodiment.
  • the HUD display area is a display area that displays information by reflecting the projected image from inside the vehicle.
  • the HUD display area rotates the mirror that constitutes the HUD placed inside the vehicle, and when viewed from point V1 defined in JIS R3212:2015, the light from the mirror that constitutes the HUD illuminates the windshield. range, defined as
  • the control device 190 controls the wedge-shaped glass manufacturing apparatus 100 based on the wedge angle of the management position X located within the HUD display area, thereby improving the accuracy of maintaining the wedge angle in the HUD display area within a predetermined range.
  • the wedge angle at the management position X calculated by the inspection device 180 is transmitted to the control device 190 shown in FIG.
  • the control device 190 controls the wedge-shaped glass manufacturing apparatus 100 based on the transmitted trend of the wedge angle so that the difference between the wedge angle at the control position X and the ideal wedge angle at the control position X is predetermined. Control within the range.
  • the wedge angle trend means the time transition of the wedge angle transmitted to the control device 190 .
  • the control device 190 changes the positions of the vertical cutting lines L1 to L4 in the width direction based on the increase or decrease in the wedge angle at the management position X.
  • the widthwise positions of the vertical cutting lines L1 to L4 can be moved by changing the widthwise positions of the cutters 121 provided in the vertical cutting machine 120 by the control device 190 .
  • the glass product portions 11A and 11B can be cut out from appropriate positions on the glass plate 10 so that the wedge angle at the management position X is close to the ideal wedge angle.
  • the control device 190 changes the position in the width direction where the first vertical folder 150 and the second vertical folder 160 apply bending stress based on the transmitted wedge angle trend and the positional change of the vertical cutting line. It is preferable to let The position in the width direction of the bending stress applied by the first vertical folder 150 can be moved by changing the positions in the width direction of the pressing protrusions and the support rolls provided in the first vertical folder 150. . The position in the width direction of the bending stress applied by the second vertical folder 160 can be moved by changing the position in the width direction of the pressing rolls provided in the second vertical folder 160 . Thereby, the glass product portions 11A and 11B can be cut out from appropriate positions on the glass base plate 10 with higher accuracy.
  • the control device 190 may control the separating device 170 based on the wedge angle at the management position X. Further, the control device 190 may change the positions of the separating rolls or separating projections provided in the separating device 170 based on the transmitted trend of the wedge angle and the change in the position of the vertical cutting line. Thereby, the position of the width direction of the glass product parts 11A and 11B on the transport roll 110 after passing through the separating device 170 can be appropriately adjusted.
  • the control device 190 controls the wedge angles of the glass product sections 11A and 11B at the management position X so that the difference from the ideal wedge angle at the predetermined management position X is within a predetermined range.
  • the difference from the ideal wedge angle is preferably controlled within plus or minus 0.1 mrad, more preferably within plus or minus 0.05 mrad, and preferably within plus or minus 0.03 mrad. is more preferably controlled to Note that this can also be applied to the second embodiment.
  • the control device 190 instructs the wedge-shaped glass manufacturing apparatus 100 that the wedge angle within the HUD display area of the glass product sections 11A and 11B is 0.2 mrad or more and 1.5 mrad or less. More preferably, it is controlled to be 0.2 mrad or more and 0.9 mrad or less, and more preferably 0.3 mrad or more and 0.8 mrad or less. Note that this can also be applied to the second embodiment.
  • the double image is reduced. is suppressed to a level that is hardly a problem in the market, and if it is 0.3 mrad or more and 0.8 mrad or less, the double image is suppressed to a level below the minimum visual acuity resolution of 0.7 required for a normal car license. be done.
  • the HUD display area may vary depending on the mounting angle of the windshield and the mounting angle and position of the illuminator that displays information on the windshield. An optimal wedge angle is selected.
  • FIG. 3 is a plan view showing a second embodiment of the wedge-shaped glass manufacturing method.
  • the glass base plate 10 formed to have a plate thickness change portion in the width direction is continuously transported in the wedge-shaped glass manufacturing apparatus 200, cut and inspected, This results in wedge-shaped glassware portions 11A and 11B.
  • the glass base plate 10 is transported by a plurality of transport rolls 210 shown in FIG.
  • the plurality of transport rolls 210 are arranged at a constant pitch distance along the longitudinal direction (direction A) of the glass base plate on the main transport path 201 .
  • the sub-transport path 202 they are arranged at a constant pitch distance along the width direction (B direction) of the glass base plate 10 .
  • the glass member 10P is cut out from the glass base plate 10 by the horizontal folding machine 240, moved to the transportation roll 211 whose length in the width direction is shorter than the transportation roll 210, and is cut from the glass member 10P by the first vertical folding machine 250.
  • the glass member 10Q having no edge is cut out, and the ear portions 12A and 12B are removed from the conveying path as unnecessary portions.
  • the vertical cutter 220, the transverse machine 230, the horizontal folder 240, and the first vertical folder 250 are, for example, the vertical cutter 120, the horizontal machine 130, the horizontal folder 140, and the first vertical folder of the first embodiment. It may be the same as the folding machine 150 .
  • the glass member 10Q having no lugs moves from the conveying rolls 211 having a short widthwise length on the main conveying path 201 to the conveying rolls 210 on the sub conveying path 202, and is conveyed in the width direction.
  • a bending stress is applied to the glass member 10Q having no lugs by the second vertical folding machine 260, and it is folded along the vertical cut lines L3 and L4, thereby forming the glass product portions 11A and 11B and the unnecessary portions. It is divided into a central portion 13 which is .
  • the second vertical folding machine 260 is provided with pressing rolls that can move back and forth in the plate thickness direction (not shown).
  • the second vertical folding machine 260 presses the glass base plate 10 from below the glass member 10Q having no lugs with a pressing roll to apply a bending stress along the width direction centering on the vertical cutting lines L3 and L4. Act and fold along vertical cutting lines L3 and L4. Thereby, the glass product portions 11A and 11B are cut out from the glass member 10Q having no ear portion.
  • the second vertical folding machine 260 can automatically control the timing of applying bending stress by the pressing rolls.
  • the separating device 170 described in the first embodiment may not be installed on the sub-conveyance path 202 .
  • FIG. 4B and 4C are plan views showing a wedge angle detection method for the management position X.
  • FIG. The inspection device 280 includes a board thickness measuring device 281 as shown in FIG. 4B.
  • the plate thickness measuring device measures the plate thickness along the width direction L6 of the glass product portions 11A and 11B so as to include the management position X. As shown in FIG. As a result, a plate thickness profile as shown in FIG. 4C is created, and plate thicknesses at the control position Y and the control position Z are obtained.
  • the wedge angle at the management position X of the glass product parts 11A and 11B is calculated.
  • the inspection device 280 can measure the plate thickness and calculate the wedge angle with a simpler mechanism than in the first embodiment.
  • Control device The wedge angle at the management position X calculated by the inspection device 280 is transmitted to the control device 290 shown in FIG.
  • the control device 290 controls the wedge-shaped glass manufacturing apparatus 200 based on the transmitted trend of the wedge angle so that the difference between the wedge angle at the control position X and the ideal wedge angle at the control position X is predetermined. Control within the range.
  • the control device 290 changes the widthwise position of each cutter 221 provided in the vertical cutting machine 220 based on the trend of the wedge angle, thereby adjusting the vertical cutting lines L1 to L4 in the width direction. move the position of Thereby, the glass product portions 11A and 11B can be cut out from appropriate positions on the glass plate 10 so that the wedge angle at the management position X is close to the ideal wedge angle.
  • the control device 290 changes the position in the width direction where the first vertical folder 250 and the second vertical folder 260 apply bending stress based on the transmitted wedge angle trend and the position change of the vertical cutting line. It is preferable to let The position in the width direction of the bending stress applied by the first vertical folder 250 can be moved by changing the positions in the width direction of the pressing projections and the support rolls provided in the first vertical folder 250. . The position in the width direction of the bending stress applied by the second vertical folder 260 can be moved by changing the timing at which the pressing rolls of the second vertical folder 260 apply the bending stress. Thereby, the glass product portions 11A and 11B can be cut out from appropriate positions on the glass base plate 10 with higher accuracy.
  • the difference between the maximum thickness and the minimum thickness of the wedge-shaped glass manufactured by the manufacturing method according to one embodiment of the present invention is preferably 0.1 mm or more. If the thickness is 0.1 mm or more, it is possible to suppress the occurrence of double images when the glass is used as information display glass even when it is installed in an automobile as a windshield with a large angle with respect to the horizontal.
  • the difference between the maximum thickness and the minimum thickness of the wedge-shaped glass may be 0.3 mm or more, or may be 0.5 mm or more. On the other hand, the difference between the maximum thickness and the minimum thickness of the wedge-shaped glass may be 1.5 mm or less, 1.2 mm or less, or 1.0 mm or less.
  • the main surface of the wedge-shaped glass manufactured by the manufacturing method according to one embodiment of the present invention preferably has a maximum roughness curve height Rz of 0.3 ⁇ m or less at a reference length of 25 mm specified in JISB0601:2001. If the Rz is 0.3 ⁇ m or less, when the plate glass is used as information display glass, the scenery seen through the glass is less likely to be distorted, and the reflection image when information is displayed on the plate glass is less likely to be distorted.
  • the roughness curve is represented by a shape waveform.
  • Rz is more preferably 0.25 ⁇ m or less, even more preferably 0.2 ⁇ m or less.
  • the use of the wedge-shaped glass manufactured by the manufacturing method according to one embodiment of the present invention is not limited to windshields for automobiles, and may be windshields for automobiles and trains, or windshields for motorcycles. Any glass may be used as long as it can display. Moreover, it is not limited to the information display glass for vehicles, and can be used for various other information display glasses. Furthermore, it can be used for various devices that utilize continuous changes in transmission characteristics, even for applications other than information display.
  • a wedge-shaped glass was manufactured from a glass base plate having a convex cross section in a glass manufacturing apparatus having a main transport path and a sub-transport path vertically connected to the main transport path.
  • a longitudinal cutter, a crosser, a horizontal folding machine, and the first vertical folding machine were installed on the main transport path, and a second vertical folding machine and an inspection device were installed on the double transport path.
  • the inspection device calculated the wedge angle at the control position X of the glass product part from the thickness at the control position Y, the thickness at the control position Z, and the distance between the control positions Y and Z in the width direction.
  • the glass manufacturing apparatus includes a control device, and based on the wedge angle at the management position X of the glass product part detected by the inspection device, the width direction position of each cutter provided in the vertical cutter, the first vertical folding The control device controlled the widthwise positions of the pressing projections and support rolls provided in the folding machine, and the timing at which the pressing rolls provided in the second vertical folding machine applied the bending stress.
  • the distance between the pitches of the conveying rolls of the glass manufacturing apparatus was 150 mm, and the conveying speed was 1800 m/h.
  • the management position Y, the management position X, and the management position Z are arranged in order in the width direction from the side where the plate thickness of the glass product part is small to the side where the plate thickness is large. It was located at the midpoint of the control position Z.
  • the management position X is located 17 inches (431.8 mm) in the width direction from the end (L1 or L2) of the glass product portion where the plate thickness is small.
  • the angle ⁇ i was 0.36 mrad.
  • the wedge angle ⁇ at the management position X of the glass product part being transported was detected by changing the width direction distance d between the management position Y and the management position Z. Then, it was compared with the actual wedge angle ⁇ r at the control position X of the glass product portion detected in the stopped state. Under the conditions of Examples 1 to 7, 20 glass product parts were verified, and the absolute value of the difference ⁇ - ⁇ r between the wedge angle ⁇ and the actual wedge angle ⁇ r was 0.1 mrad in one or more glass product parts. If the absolute value of the difference ⁇ - ⁇ r between the wedge angle ⁇ and the actual wedge angle ⁇ r is 0.1 mrad or less in all the 20 glass parts, the value is entered in Table 1 as x. ⁇ means that the wedge angle at the control position X of the glass product part being transported can be measured with high accuracy, and ⁇ means the opposite.
  • Examples 1 and 7 had a distance d of less than 50 mm or greater than 250 mm and an absolute value of ⁇ - ⁇ r of greater than 0.1 mrad for one or more glassware parts.
  • the distance d was 100 mm or more and 250 mm or less, and the absolute value of ⁇ ⁇ r was 0.1 mrad or less for all the 20 glass products.
  • the wedge angle ⁇ at the management position X of the glass product part detected during transportation is equal to that of the glass product part detected in the stopped state. It was found that the difference from the actual wedge angle ⁇ r at the control position X of is small and can be detected with high accuracy. Thereby, based on the highly accurate wedge angle trend transmitted from the inspection device, the control device can determine the position of the vertical cutting line formed by the vertical cutting machine and the position of the bending stress applied by the vertical folding machine. It is possible to control the glass manufacturing equipment with high precision.
  • Example 8 was obtained by continuously producing 100 glass products under machine control.
  • Example 9 is obtained by measuring the wedge angle ⁇ under the conditions of Example 4.
  • Example 8 the absolute value of the difference ⁇ - ⁇ i between the wedge angle ⁇ at the control position X of the manufactured glass product and the ideal wedge angle ⁇ i (0.36 mrad) at the predetermined control position X is 100. It was 0.1 mrad or less in all of the glass products, and the wedge angle ⁇ could be kept within a predetermined range.
  • Example 9 in three glass product parts out of 100, the wedge angle ⁇ at the control position X of the manufactured glass product part and the ideal wedge angle ⁇ i (0. 36 mrad), the absolute value of the difference ⁇ i exceeded 0.1 mrad, and the wedge angle ⁇ could not be kept within the predetermined range.
  • control device controls the vertical cutter, the first vertical folding machine, and the second vertical folding machine based on the trend of the wedge angle ⁇ detected by the inspection device, thereby manufacturing glass products It was confirmed that the wedge angle .delta.
  • the wedge angle of the wedge-shaped glass cut out from the glass base plate can be brought closer to a predetermined target value, and a wedge-shaped glass that can be used for various purposes can be obtained.
  • SYMBOLS 10 Convex glass plate, 11A... Glass part of glass plate 10, 11B... Glass part of glass plate 10, 12A... Edge of glass plate 10, 12B... Ear of glass plate 10 , 13... Central portion of glass plate 10 20... Concave glass plate 21A... Glass product portion of glass plate 20 21B... Glass product portion of glass plate 20 22A... Edge of glass plate 20 , 22B... Ear portion of the glass plate 20, 23... Central portion of the glass plate 20, 30... Tapered glass plate, 31... Glass product portion of the glass plate 30, 32A... Ear portion of the glass plate 30 , 32B... ear portion of glass plate 30, 100... wedge-shaped glass manufacturing apparatus, 110... transport roll, 111... transport roll shorter in width direction than transport roll 110, 120...
  • first vertical folder 260 Second vertical folding machine 280 Inspection device 281 Plate thickness measuring device 290
  • Control device L1 Vertical cut line formed at boundary between glass product portion 11A and ear portion 12A L2 Glass product Vertical cutting line formed on the boundary between the portion 11B and the ear portion 12B L3: Vertical cutting line formed on the boundary between the glass product portion 11A and the central portion 13 L4: on the boundary between the glass product portion 11B and the central portion 13 Longitudinal cutting line to be formed, L5... Horizontal line, L6... Width direction line along which plate thickness is measured by inspection device, E1... One end of glass product part 11A, E2... One end of glass product part 11B

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
PCT/JP2022/039405 2021-11-08 2022-10-21 楔形ガラスの製造方法 Ceased WO2023079991A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016117650A1 (ja) * 2015-01-21 2016-07-28 旭硝子株式会社 板ガラスの製造方法、板ガラス、合わせガラスの製造方法
JP3225806U (ja) * 2020-01-24 2020-04-02 Ａｇｃ株式会社 ガラス板の製造装置
JP2020173291A (ja) * 2019-04-08 2020-10-22 セントラル硝子株式会社 ヘッドアップディスプレイガラス用ガラス素板、及びその製造方法、並びにヘッドアップディスプレイガラスの製造方法
WO2021193647A1 (ja) * 2020-03-23 2021-09-30 日本板硝子株式会社 ウインドシールド

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016117650A1 (ja) * 2015-01-21 2016-07-28 旭硝子株式会社 板ガラスの製造方法、板ガラス、合わせガラスの製造方法
JP2020173291A (ja) * 2019-04-08 2020-10-22 セントラル硝子株式会社 ヘッドアップディスプレイガラス用ガラス素板、及びその製造方法、並びにヘッドアップディスプレイガラスの製造方法
JP3225806U (ja) * 2020-01-24 2020-04-02 Ａｇｃ株式会社 ガラス板の製造装置
WO2021193647A1 (ja) * 2020-03-23 2021-09-30 日本板硝子株式会社 ウインドシールド

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