WO2019203167A1 - Dispositif et procédé de formation de verre selon une forme de surface incurvée - Google Patents

Dispositif et procédé de formation de verre selon une forme de surface incurvée Download PDF

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Publication number
WO2019203167A1
WO2019203167A1 PCT/JP2019/016070 JP2019016070W WO2019203167A1 WO 2019203167 A1 WO2019203167 A1 WO 2019203167A1 JP 2019016070 W JP2019016070 W JP 2019016070W WO 2019203167 A1 WO2019203167 A1 WO 2019203167A1
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WO
WIPO (PCT)
Prior art keywords
glass
curved surface
glass plate
lower mold
pressing rollers
Prior art date
Application number
PCT/JP2019/016070
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English (en)
Japanese (ja)
Inventor
俊之 辻井
隆哲 武内
亮輔 武内
Original Assignee
株式会社武内製作所
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
Priority claimed from JP2018213505A external-priority patent/JP2019189512A/ja
Application filed by 株式会社武内製作所 filed Critical 株式会社武内製作所
Publication of WO2019203167A1 publication Critical patent/WO2019203167A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds

Definitions

  • the present invention relates to an apparatus and a method for molding glass into a curved shape, and more particularly to an apparatus and a method for molding glass into a curved shape for realizing a complicated curved shape.
  • an information display device for satisfying an HMI Human Machine Interface
  • an in-vehicle navigation system, an audio device, and the like are remarkably widespread, and images and images provided by these devices are remarkable.
  • an in-vehicle display device that displays
  • a so-called head-up display (HUD) device configured to transmit and illuminate a liquid crystal display element with a backlight.
  • HUD itself is evolving as a screen display body having a multifunctional role.
  • a more complicated curved surface is required.
  • an optical mirror surface after molding is required.
  • a method of forming glass for automobiles there are methods such as heating the glass to a temperature higher than the softening point and bending it by its own weight or pressing, or by its own weight bending or press bending.
  • press molding is used for molding deeply curved glass or horseshoe-shaped glass.
  • the invention according to Patent Document 1 calculates the stress generated in the glass plate by press bending in the press bending method using press molding, and the stress obtained by the stress calculation is in-plane compressive stress.
  • a method of press bending a glass plate under a press bending condition in which the in-plane compressive stress is equal to or less than an allowable value calculated by buckling theory is proposed.
  • the invention according to Patent Document 2 proposes a method of bending a glass plate by conveying the glass plate heated to near the softening point in a heating furnace with a roller conveyor composed of a plurality of curved rollers. According to this method, since the softened glass plate hangs down by its own weight, the glass plate is bent so as to follow the curvature of the roller. In this case, the glass plate is bent and formed in a direction orthogonal to the conveying direction.
  • the invention according to Patent Literature 3 proposes that the roller assembly according to Patent Literature 2 bends the glass plate by pressing the conveyance roller while moving the conveyance roller up and down as the glass is conveyed.
  • an object of the present invention is to propose a glass curved surface forming apparatus and a method for realizing an optical mirror surface after forming, as well as realizing a complicated curved surface of glass.
  • the present invention provides a lower mold having a plurality of cavities for placing a glass plate on which a desired curved surface is formed and evacuating, and pressurizing the glass plate in a desired bending direction.
  • a glass curved surface forming apparatus comprising a plurality of pressing rollers, wherein the one or more pressing rollers have a desired curved surface of the lower mold in a state where the glass plate heated to the bending temperature is placed on the lower mold.
  • the glass plate is formed to have a predetermined curvature by evacuating the cavity immediately after one or more pressing rollers roll in the lower die while rolling along .
  • the lower mold includes a first evacuation region for fixing the glass plate and a second evacuation region in which one or a plurality of pressing rollers roll on the surface of the glass plate, and the glass plate is a first vacuum. While being fixed to the pulling area, one or more pressing rollers pressurize while rolling the surface of the glass plate along the curved surface of the lower mold, and immediately after one or more pressing rollers roll in the lower mold It is preferable that the second evacuation region is formed into a predetermined curvature by evacuation. Further, the one or more pressing rollers may press the curvature of the plurality of curved surfaces of the glass plate while rolling a plurality of times toward the bending center of the plurality of curved surfaces.
  • the lower die moves, and the rolling direction of the one or more pressing rollers is preferably opposite to the moving direction of the lower die.
  • the one or more pressing rollers may be designed to move up and down via a hydraulic telescopic member or a link member.
  • the pressing roller is supported by a support member via a roller shaft, and the levelness of the pressing roller can be finely adjusted by raising and lowering the left and right rods included in the roller shaft.
  • the glass curved surface forming method includes a lower mold having a plurality of cavities on which a desired curved surface is formed and a glass plate is placed and vacuumed, and the glass plate provided above the lower die.
  • a glass curved surface forming apparatus comprising one or a plurality of pressing rollers that pressurize in a desired bending direction, a step of placing the glass plate on the lower mold, and a molding in which the glass plate is vacuumed and fixed to the lower mold and heated.
  • the preheating step and the glass plate that has been transported after heating are subjected to pressure applied to the curved surface while one or more pressing rollers roll along the curved surface of the lower mold, Alternatively, it is characterized by comprising a molding step of forming a predetermined curvature by evacuating the cavity immediately after the plurality of pressing rollers roll.
  • the lower mold includes a first evacuation region for fixing the glass plate, and a second evacuation region in which one or more pressing rollers roll on the surface of the glass plate, and the glass plate is a first vacuum.
  • one or more pressing rollers pressurize while rolling the surface of the glass plate along the curved surface of the lower mold, and immediately after one or more pressing rollers roll in the lower mold
  • the second evacuation region is formed into a predetermined curvature by evacuation.
  • the one or more pressing rollers pressurize the curvature of the plurality of curved surfaces of the glass while rolling a plurality of times toward the bending center of the plurality of curved surfaces.
  • an analysis step for performing curved surface analysis of the shape of the mold, a place where one or a plurality of pressing rollers roll based on the result of the curved surface analysis, a rolling order It is preferable that a determination step for determining the adjustment of the level of the one or more pressing rollers is provided in advance. Furthermore, it is preferable that the determination step described above can adjust the linkage with the moving speed of the lower mold.
  • the glass curved surface forming method and apparatus according to the present invention can realize a slightly complicated curved surface of glass and an optical mirror surface after molding. Further, since the thickness of the glass plate and the bending shape of the glass plate are various, the bending by the pressing roller is flexible, and more advantageous in cost than the press forming by the upper die and the lower die.
  • FIG. 5 is a diagram simply showing rolling and pressing of a pressing roller 21 subsequent to FIG. 4 in glass curved surface forming according to Example 1 of the present invention.
  • FIG. 6 is a front view showing the shape of a mold used in an experiment according to Example 3.
  • FIG. It is a flowchart of the curved surface shaping
  • FIG. It is a figure which shows the mode of the curved surface shaping
  • FIG. 1 is a schematic configuration diagram illustrating a glass curved surface forming apparatus 100 according to a first embodiment of the present invention. This will be described in detail with reference to FIG.
  • the glass curved surface forming apparatus 100 is configured by connecting a heating unit 1 and a forming unit 2 to each other, and is divided by side walls that can be freely opened and closed. Since the side wall S is openable and closable, the inside of each part is appropriately chambered, and has a role of preventing a rapid temperature drop due to outside air. Note that the side wall S may be eliminated, and the heating unit 1 and the molding unit 2 may be made into one space.
  • the heating part 1 and the molding part 2 are made into one space, it is necessary to consider that it becomes difficult to keep the temperature in the heating part 1 at a predetermined temperature because the space becomes wide.
  • the heating unit 1 includes a heater 11 and a heater support member 12.
  • the heater 11 is supported by a heater support member 12 and may be configured to be driven up and down by a hydraulic cylinder and servo control.
  • the molding unit 2 may be configured such that the roller device 20 is installed on the base 29 and is driven up and down by a hydraulic cylinder and servo control.
  • type 31 which mounts the glass plate G can be mounted on the lower mold
  • the material of the lower mold 31 is preferably metal or ceramics. However, in the case of ceramics, there is fire resistance, excellent specularity after processing, high temperature and good releasability from glass. preferable.
  • FIG. 2 is a diagram illustrating a part of the roller device 20 according to the first embodiment of the present invention.
  • the roller device 20 will be described in detail with reference to FIGS.
  • the roller device 20 generally includes a pressing roller 21, a roller shaft 22, an arm 23, and a robot housing base 24.
  • the pressing roller 21 is rotatably supported by a roller shaft 22 and is attached to an arm 23.
  • the arm 23 is housed and mounted in a robot housing base 24 and moves up and down by a sliding cylinder.
  • Servo motor controls important pressure, speed and alignment as molding conditions.
  • the robot housing base 24 is attached to a base 29 provided on the ceiling of the molding part 2, and the glass placed on a lower mold 31 described later while the pressing roller 21 rolls as the arm 23 moves up and down. Press the plate G.
  • the attachment is fixed, but the robot housing base 24 may be designed so that the lower surface of the base 29 can move freely. Further, the level of the pressing roller 21 may be finely adjusted by raising and lowering the left and right rods of the roller shaft 22 attached to the arm 23.
  • the arm 23 may be operated by a link member.
  • the material of the pressure roller 21 may be heat resistant metal or ceramic.
  • the pressing roller 21 is a cylindrical body, but may be a spherical body or a conical body.
  • FIG. 3A is a perspective view of the glass Gf1 formed in Example 1 of the present invention
  • FIG. 3B is a side view
  • FIG. 3C is a plan view showing a bending direction.
  • the molded glass Gf1 according to the first embodiment of the present invention has a downward bent shape in the length direction toward one end of the glass plate.
  • FIG. 3C is a plan view
  • A1 is an arrow indicating a bending direction
  • the above-described pressing roller 21 rolls in the bending direction A1 while the glass plate G placed on the lower mold 31 is predetermined. Press the part.
  • the lower mold 31 has a shape designed by the bending direction of the molded glass Gf1.
  • FIG. 4 and FIG. 4 and 5 are diagrams simply showing rolling and pressing of the pressing roller 21 in the curved surface forming of the glass according to the first embodiment of the present invention, and (a) to (c) are shown in time series.
  • FIG. 5 (a) should be understood as a diagram showing a state performed after FIG. 4 (c).
  • FIG. 4A shows a state in which the glass plate G is heated by the heater 11 while being placed on the lower mold 31 in the heating unit 1.
  • a near infrared heater is used as the heater 11 so that the temperature is gradually raised to the vicinity of the glass softening point in about 4 minutes.
  • the heater 11 is raised and the shutter S is opened. If it does so, the lower mold
  • the lower mold transfer wheel 32 starts to move to the molding unit 2, the arm 23 of the roller device 20 descends, the pressing roller 21 stands by slightly above the glass plate G, and the lower mold is detected when the sensor detects the molding start location.
  • the transfer vehicle 32 stops and the pressing roller 21 is pressed against the glass plate G (FIG. 4C).
  • the lower mold transfer vehicle 32 moves again in the same direction, and the pressing roller 21 rolls in a direction opposite to the moving direction of the lower mold transfer vehicle 32, and a predetermined
  • the glass plate G is pressed with pressure (FIGS. 5A and 5B).
  • the sensor detects the molding end point
  • molding is inadequate, the lower mold
  • FIG. 6 is a flowchart of the glass curved surface forming method according to the first embodiment of the present invention.
  • FIGS. 7 and 8 are diagrams showing in detail the curved surface molding of the glass along the flowchart shown in FIG.
  • the lower mold 31 includes a cavity region (first evacuation region # 1, # 3, second evacuation region # 4, # 5, # 6), and a vacuum is applied to the glass plate G through the cavity.
  • the glass plate G can be pulled into the cavity and brought into contact with the molding surface to apply and position and fix the glass plate G.
  • the base 29 is provided with an end vacuum support part # 2 capable of evacuating one end of the glass plate G.
  • the end vacuum support part # 2 is movable.
  • the glass plate G is placed on a predetermined position of the lower mold 31 (S11). And cavity area
  • the heater support part 12 descends to bring the heater 11 closer to the glass plate G and mainly heat the # 1 area and the # 3 area (S13).
  • region and edge part vacuum support part # 2 are evacuated, the glass plate G is fixed, and # 4 area
  • the lower mold transfer wheel 32 on which the heated glass plate G and the lower mold 31 are placed moves to the molding unit 2. At this time, evacuation to the # 1 region and the # 3 region is suppressed, and the heat retaining state is maintained.
  • the lower mold transfer wheel 32 starts to move to the molding unit 2
  • the arm 23 of the roller device 20 descends, the pressing roller 21 stands by slightly above the glass plate G, and the lower mold is detected when the sensor detects the molding start location.
  • the pressing roller 21 starts rolling and pressing (S15).
  • one roller device 20 includes one pressing roller 21, but a plurality of roller devices may be designed to include a plurality of pressing rollers.
  • FIG. 9 is a diagram illustrating glass Gf2 (a) and Gf3 (b) formed with a plurality of bending directions.
  • the bending directions are two of A2 and A3, and in the case of FIG. 9B, the bending directions are four directions of A4, A5, A6, and A7.
  • the pressing roller 51 employs a cylindrical body, but a spherical body or a conical body may be employed.
  • the material of the pressing roller 51 may be a heat resistant metal or ceramic.
  • FIG. 10A is a perspective view of the glass Gf3 formed in Example 2 of the present invention
  • FIG. 10B is a side view
  • FIG. 10C is a plan view showing a bending direction.
  • the shaped glass Gf3 according to Example 2 of the present invention has a shape that is bent downward in the length direction from the center of the glass plate toward one end, and the upper and lower ends of one end in the plan view are also bent in the direction of the arrow. Is bent downward in the direction of the arrow.
  • FIG. 10 (c) is a plan view, and A4, A5, A6, and A7 are arrows indicating the bending direction, and the pressing roller 41 described above is rolling toward the bending directions A4, A5, A6, and A7, respectively. Then, a predetermined portion of the glass plate G placed on the lower mold 61 is pressed. Naturally, the lower mold 61 has a shape designed by the bending direction of the molded glass Gf3.
  • FIG. 11 is a schematic configuration diagram showing a glass curved surface forming apparatus 200 according to Embodiment 2 of the present invention.
  • the glass curved surface forming apparatus 200 includes a heating unit 4 and a forming unit 5 connected to each other, and is divided by an openable / closable side wall S. Since the side wall S is openable and closable, the inside of each part is appropriately chambered, and has a role of preventing a rapid temperature drop due to outside air.
  • main devices included in each unit will be described.
  • the heating unit 4 includes a heater 41 and a heater support member 42.
  • the heater 41 is supported by a heater support member 42 and may be configured to be driven up and down by a hydraulic cylinder and servo control.
  • the molding unit 5 may be configured such that the roller device 50 is installed on the base 59 and is driven up and down by a hydraulic cylinder and servo control. And in order to shape
  • the material of the lower mold 61 is preferably metal or ceramic.
  • the roller device 50 generally includes a pressing roller 51, a roller shaft 52, an arm 53, and a robot housing base 54.
  • the pressing roller 51 is rotatably supported by a roller shaft 52 and is attached to an arm 53.
  • the arm 53 is housed and mounted in a robot housing base 54 and moves up and down by a sliding cylinder.
  • the arm 53 is preferably provided with a hinge 55 so that the pressing roller 51 can freely roll on a double curved surface.
  • important control of pressure, speed, and alignment is performed by a servo motor.
  • the shape data of the curved surface of the lower mold 61 is analyzed in advance by a computer.
  • the robot housing base 54 is attached to a base 59 provided on the ceiling of the molding unit 5, and the arm 53 moves up and down to press the glass plate G placed on the lower mold 61 while the pressing roller 51 rolls. To do.
  • this attachment is fixed, but it may be designed so that the robot housing base 54 can freely move on the lower surface of the base 59.
  • FIG. 12 is a diagram illustrating the rotation of the pressing roller 51 according to the second embodiment of the present invention.
  • the arm 53 can be rotated 360 degrees by a hinge 55, so that the pressing roller 51 can move not only to the left and right but also to adjust the level.
  • FIG.12 (b) it is possible to change direction to the bending center of a some curved surface.
  • FIG. 13 is a flowchart of the curved glass surface forming method according to the second embodiment of the present invention.
  • the curved surface forming method for glass according to the second embodiment of the present invention includes an analysis step (S21) for analyzing the shape of the mold in a curved surface prior to the heating step (S24) and the curved surface forming step (S25), and the curved surface analysis. Based on the result, a determination step (S22) for determining a place where the pressing roller rolls, a rolling order, and adjustment of the level of the pressing roller is provided in advance.
  • the shape of the curved surface of the lower mold 61 in advance, it is preferable to grasp the shape of the curved surface from the Gaussian curvature and the average curvature.
  • the Gaussian curvature is determined by the product of the vertical and horizontal curvatures of the curved surface
  • the average curvature is determined by the average of the vertical and horizontal curvatures of the curved surface.
  • the curved surface analysis may be calculated using CAD data when the lower mold is manufactured.
  • one roller device 50 includes one pressing roller 51, but a plurality of roller devices may be designed to include a plurality of pressing rollers.
  • a plurality of roller devices may be designed to include a plurality of pressing rollers.
  • FIG. 14 is a front view showing the shape of the mold used in the experiment according to Example 3.
  • FIG. 15 is a flowchart of the curved glass surface forming method according to the third embodiment of the present invention. Further, FIGS. 16 and 17 are diagrams showing in detail the curved surface molding of the glass according to Example 3.
  • FIG. 16 and 17 are diagrams showing in detail the curved surface molding of the glass according to Example 3.
  • the glass forming method according to Example 3 was conducted in the applicant's headquarters factory (1-6-14 Hasesehoncho, Amagasaki City, Hyogo Pref., Takeuchi Seisakusho Co., Ltd.) with employees present.
  • the molding method of the present invention used an S-shaped lower die 91 made of SUS shown in FIG. 14 and experimented with three types of molding methods, that is, only the dead weight, vacuum drawing, roller and vacuum drawing.
  • the glass forming method according to Example 3 is almost the same as the procedure shown in Example 1.
  • the measurement results of the experiment will be described in detail. For the experiment, the following basic conditions were the same, and only the roller was changed in pressure and the change was observed.
  • Mold S-shaped lower mold made of SUS Temperature: 520 degrees Celsius Glass thickness: Blue plate 1.1 mm Preheating (batch furnace) time: 1 minute heating at 400 ° C (IR) time: 100 seconds Vacuum pressure: -80 kPa (Experimental equipment) Thin glass curved surface molding machine / CSGM-III (Molding process) Preheating (batch furnace) ⁇ Input ⁇ Move to heating position ⁇ Heating (IR) ⁇ Roller molding ⁇ Move to extraction position ⁇ Extraction
  • FIG. The lower die 91 includes cavity regions (first vacuuming regions # 71, # 73, second vacuuming regions # 74, # 75, # 76), and the glass plate G is vacuumed via the cavity C.
  • the glass plate G can be pulled into the cavity C and brought into contact with the molding surface so that the glass plate G is positioned and fixed.
  • an end vacuum support part # 72 capable of evacuating one end of the glass plate G is provided in the base.
  • the end vacuum support portion # 72 is movable.
  • the glass plate G is placed on a predetermined position of the lower mold 91 (S31). And cavity area
  • the heater support part 12 descends to bring the heater 11 closer to the glass plate G and mainly heat the # 71 region and the # 73 region (S33).
  • the # 71 area and the # 73 area are slightly gentle areas of the lower mold 91, the glass plate G is landed on the lower mold 91 by its own weight, and the landed # 73 area and the end vacuum support section # 72 are connected to each other. Vacuum is applied to fix the glass plate G.
  • the # 74 area, # 75 area, and # 76 area are gradually heated (S34). Thereafter, the heater is left as it is, and the evacuation to the # 71 region and the # 73 region is suppressed, and the heat insulation state is maintained.
  • the arm of the roller device descends, the pressing roller 81 stands by a little above the glass plate G, and when the sensor detects the molding start position, the lower mold transfer vehicle is The pressing roller 81 is pressed against the # 74 area of the glass plate G, and then the pressure roller 81 is moved in accordance with the movement of the lower transfer vehicle while the vacuuming of the # 74 area is fixed. Rolling and pressing are started (S35).
  • the glass curved surface forming method and apparatus according to the present invention realizes a curved surface having a high quality surface property and an optical mirror surface, so that the resulting molded glass is widely used for in-vehicle display devices and the like. Can do.

Abstract

Le problème décrit par la présente invention est de fournir un dispositif de formation de surface incurvée en verre et un procédé associé pour réaliser une surface de miroir optique après la formation ainsi que pour réaliser une surface incurvée compliquée dudit verre. La solution de l'invention porte sur un dispositif de formation de surface incurvée en verre comprenant un moule inférieur équipé d'une pluralité de cavités, sur lesquelles une surface incurvée souhaitée est formée et une plaque de verre est disposée et placée sous vide, et un ou plusieurs rouleaux de pression qui pressent le verre dans une direction de courbure souhaitée. Le dispositif est caractérisé en ce que, la plaque de verre est chauffée à la température de cintrage et placée sur le moule inférieur, le ou les rouleaux de pression exercent une force de pression tout en roulant le long de la surface incurvée souhaitée du moule inférieur, et une plaque de verre d'une courbure prédéterminée est formée dans le moule inférieur en plaçant une cavité sous vide immédiatement après le passage du ou des rouleaux de pression.
PCT/JP2019/016070 2018-04-18 2019-04-13 Dispositif et procédé de formation de verre selon une forme de surface incurvée WO2019203167A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2018-079589 2018-04-18
JP2018079589 2018-04-18
JP2018-213505 2018-11-14
JP2018213505A JP2019189512A (ja) 2018-04-18 2018-11-14 ガラスを曲面形状に成形する装置及びその方法

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WO2019203167A1 true WO2019203167A1 (fr) 2019-10-24

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005154164A (ja) * 2003-11-21 2005-06-16 Central Glass Co Ltd ガラス板のプレス曲げ成形方法
JP2008100914A (ja) * 2002-06-17 2008-05-01 Nippon Sheet Glass Co Ltd 曲げガラス板の製造方法及び装置
KR20110096455A (ko) * 2010-02-22 2011-08-30 우명성 일측 또는 양측에 곡면부를 갖는 핸드폰용 커버글래스 성형장치
JP2017537048A (ja) * 2014-10-29 2017-12-14 コーニング インコーポレイテッド 加熱されたガラスシートを成形または形成する装置および方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008100914A (ja) * 2002-06-17 2008-05-01 Nippon Sheet Glass Co Ltd 曲げガラス板の製造方法及び装置
JP2005154164A (ja) * 2003-11-21 2005-06-16 Central Glass Co Ltd ガラス板のプレス曲げ成形方法
KR20110096455A (ko) * 2010-02-22 2011-08-30 우명성 일측 또는 양측에 곡면부를 갖는 핸드폰용 커버글래스 성형장치
JP2017537048A (ja) * 2014-10-29 2017-12-14 コーニング インコーポレイテッド 加熱されたガラスシートを成形または形成する装置および方法

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