WO2011122679A1 - Dispositif pour mouler et renforcer une plaque de verre, et procédé de fabrication pour plaque de verre - Google Patents

Dispositif pour mouler et renforcer une plaque de verre, et procédé de fabrication pour plaque de verre Download PDF

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Publication number
WO2011122679A1
WO2011122679A1 PCT/JP2011/058128 JP2011058128W WO2011122679A1 WO 2011122679 A1 WO2011122679 A1 WO 2011122679A1 JP 2011058128 W JP2011058128 W JP 2011058128W WO 2011122679 A1 WO2011122679 A1 WO 2011122679A1
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WO
WIPO (PCT)
Prior art keywords
glass plate
electrode
nozzle
strengthening
conveying
Prior art date
Application number
PCT/JP2011/058128
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English (en)
Japanese (ja)
Inventor
順士 堀
清太 宮崎
聡 吉田
智裕 諏訪
勲 斎藤
Original Assignee
旭硝子株式会社
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Application filed by 旭硝子株式会社 filed Critical 旭硝子株式会社
Publication of WO2011122679A1 publication Critical patent/WO2011122679A1/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
    • C03B23/0302—Re-forming glass sheets by bending by press-bending between shaping moulds between opposing full-face shaping moulds
    • 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
    • C03B23/025—Re-forming glass sheets by bending by gravity
    • C03B23/0252—Re-forming glass sheets by bending by gravity by gravity only, e.g. sagging
    • C03B23/0254—Re-forming glass sheets by bending by gravity by gravity only, e.g. sagging in a continuous way, e.g. gravity roll bending
    • 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
    • C03B23/025—Re-forming glass sheets by bending by gravity
    • C03B23/0258—Gravity bending involving applying local or additional heating, cooling or insulating means
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/0404—Nozzles, blow heads, blowing units or their arrangements, specially adapted for flat or bent glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/044—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position
    • C03B27/0442—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets
    • C03B27/0447—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets the quench unit being variably adaptable to the bend of the sheet

Definitions

  • the present invention relates to a glass sheet forming and strengthening device for increasing the strength of a glass sheet and a method for producing the glass sheet.
  • a thin glass plate has been used to reduce the weight of the glass plate with glass for vehicle windows of automobiles and the like.
  • a glass plate is strong against compressive stress but weak against tensile stress.
  • a method for strengthening a glass plate as shown in Patent Document 1 is known. Yes.
  • the method for strengthening a glass plate disclosed in Patent Document 1 includes a step of heating the glass plate to a temperature in the vicinity of the softening point of about 900 F to about 950 F (about 482 ° C. to about 510 ° C.), and about 0.
  • high frequency heating high frequency dielectric heating
  • radio frequency energy high frequency energy
  • the glass plate conveyed on the roller is heated by a heating source such as an infrared lamp in the heating step. And in a cooling process, radio frequency energy is added from the electrode installed near the glass plate, and a glass plate is heated from the inside. At the same time, by supplying air or compressed air from the opening provided at the tip of the nozzle provided opposite to at least one surface of the glass plate, a temperature difference is generated between the center portion and the surface of the glass plate. I am letting. The glass plate heated at high frequency is then rapidly cooled in a rapid cooling step, and a strengthened glass plate is obtained.
  • a heating source such as an infrared lamp
  • a glass plate with a temperature difference generates a tensile stress on the surface side and a compressive stress on the center side, but the stress is relaxed due to the high temperature of the glass plate, resulting in a stress distribution in the thickness direction. Is known to disappear (relax). And when this glass plate is cooled rapidly, compressive stress remains on the surface side of the glass plate and tensile stress remains on the center side.
  • bending stress is applied to the tempered glass plate configured as described above, the outer surface of the bent shape extends, but since compressive stress remains on the surface side, tensile stress is hardly generated on the glass plate. It has become.
  • the glass plate is not broken because it is strong against compressive stress.
  • the glass plate which made it hard to break by producing a fixed residual stress distribution in a glass plate is a tempered glass plate.
  • tempered glass plates molded into various curved shapes have been used.
  • a glass plate is heated to a desired temperature in a roller hearth furnace while being conveyed in a predetermined direction with a roller or the like, and then a predetermined plurality of glass plates are conveyed while being conveyed.
  • the glass plate forming and strengthening device is used to shape the glass plate into the desired curved shape by the three-dimensional curved shape formed by the roller of the glass, and further strengthen the glass plate by generating a temperature difference in the thickness direction of the glass plate. ing.
  • the glass plate when a high frequency voltage is applied to the electrode to perform high frequency heating, the glass plate itself also has a potential, so that a discharge occurs between points having a lower potential. For example, a discharge may occur between the electrode and the nozzle and between the electrode and the roller. Since high-frequency heating cannot be performed when discharge occurs, the upper limit of the high-frequency voltage that can be applied to the electrode is limited to a value that does not cause discharge. As a result, it becomes difficult to ensure the heating capacity necessary for the strengthening treatment of the glass plate.
  • This invention is made in view of such a problem, Comprising:
  • the glass plate conveyed on the reference plane which a conveyance means forms is the glass plate shape
  • high-frequency heating and cooling can be performed according to the shape of the glass plate while it is being transported, and at that time, it is possible to prevent the discharge from the high-frequency heating electrode and suitably strengthen the glass plate.
  • a glass plate forming / strengthening apparatus and a method for producing a glass plate are provided.
  • the glass sheet shaping and strengthening apparatus of the present invention heats the glass plate formed in the curved shape, a conveying means for conveying the glass plate on a reference surface, a shaping means for shaping the glass plate into a curved shape.
  • Heating means, and quenching means for rapidly cooling the glass plate by spraying a cooling medium on both sides in the thickness direction of the glass plate, wherein the heating means applies a high frequency to at least the glass plate and the glass plate
  • An electrode part having an electrode for heating the electrode, a power supply part for applying a high frequency voltage to the electrode, and an electrode arrangement adjusting means capable of adjusting a distance of the electrode with respect to the reference plane, and the quenching means
  • means exits, and a said electrode portion, said nozzle and said transfer means, is characterized in that it is electrically insulated.
  • the electrode section includes a pair of electrodes facing each other in the plate thickness direction of the glass plate, the electrode and the nozzle are disposed close to each other, and the nozzle is formed of an insulator. Is more preferable.
  • a plurality of the electrodes are arranged in a substantially straight line in a direction orthogonal to the conveying direction of the glass plate by the conveying means, and the electrode arrangement adjusting means makes the distance of each of the electrodes relative to the reference plane independent of each other. More preferably, it is configured to be adjustable.
  • the electrode arrangement adjusting means supports each of the electrode portions so as to be rotatable independently of each other at least around a predetermined center point on a virtual plane substantially orthogonal to the transport direction.
  • the electrode part is a planar electrode and can be deformed into a planar shape corresponding to the curved shape of the glass plate.
  • the transport means includes a roller conveyor having a plurality of rollers, the plurality of rollers form the reference surface, and the roller is moved up and down according to the transport position of the glass plate to thereby move the reference surface. It is more preferable to form a desired curved surface by curving at least a part.
  • the conveying means includes a roller conveyor having a plurality of rollers, the plurality of rollers forming the reference surface, and the rollers are substantially cylindrical or rotationally symmetric in the conveying direction of the glass plate by the conveying means. It is more preferable to form a conical shape and form a desired curved surface on the reference surface.
  • the plurality of openings are arranged in a substantially straight line in a direction orthogonal to the conveyance direction of the glass plate by the conveyance unit to form an opening row, and the discharge unit supplies the cooling medium to the nozzle unit.
  • the quenching means has nozzle arrangement adjusting means capable of adjusting the distance of the nozzle to the reference plane, and is arranged at a position where the opening of the nozzle portion overlaps the wind box in a plan view. More preferably. Moreover, it is more preferable that the plurality of openings of the nozzle portion are arranged at positions where the adjacent openings do not overlap when viewed from the conveying direction of the glass plate by the conveying unit.
  • the transport unit has at least a part of the surface of the glass plate to support the glass plate, and at least a contact portion with the glass plate has a support made of an insulator.
  • the electrode section is formed to extend in a direction intersecting with the conveying direction of the glass plate by the conveying means, and a plurality of feeding points provided at intervals in the intersecting direction with the electrode, An electrode wiring connected to the power supply unit and connected to each of the power supply points, the electrode wiring from the power supply unit to each of the supply electrode and the passive electrode More preferably, the distances to the points are formed so as to be substantially equidistant.
  • the manufacturing method of the glass plate of this invention is characterized by using the shaping
  • the glass plate conveyed on the reference surface formed by the conveying means is a glass plate formed into a three-dimensionally curved shape.
  • high-frequency heating and cooling can be performed according to the shape of the glass plate while it is being transported, and at that time, it is possible to prevent the discharge from the high-frequency heating electrode and suitably strengthen the glass plate.
  • a glass plate forming / strengthening apparatus and a method for producing a glass plate are provided.
  • FIG. 3 is a schematic vertical cross-sectional view of the A1-A1 cross section in FIG. 2. It is the longitudinal cross-sectional schematic diagram which expanded the B section in FIG. It is the cross-sectional schematic diagram which looked at the supply electrode in FIG. 2 from the A2 direction. It is a longitudinal cross-sectional schematic diagram which shows the flow of the air (cooling medium) in the quenching means of the reinforcement
  • heating refers to general heat generation by applying energy to a heating object, and is not necessarily limited to increasing the surface or internal temperature of the heating object.
  • energy when energy is applied in the process of cooling an object to be heated that has been heated to a certain temperature, it may include cases where the temperature rises or falls due to the balance between heat generation due to the application of cooling capacity and energy. .
  • the temperature reduction of the object to be heated is suppressed, the temperature is maintained approximately isothermal, and the temperature reduction rate is also included in the heating.
  • the heating from the inside refers to the above-described general heating due to the heating object itself generating heat, and the heat generating part is not limited to the inside if the heating object generates heat. Even heat generated from the surface is included in heating from the inside.
  • the cooling in the present invention includes known cooling methods and means in the conventional glass strengthening method.
  • a cooling method for strengthening a glass plate that has been heated to a desired temperature in advance for example, an active cooling means such as air cooling with a blower or high-pressure gas, liquid cooling, mist cooling, or contact-type cooling.
  • an active cooling means such as air cooling with a blower or high-pressure gas, liquid cooling, mist cooling, or contact-type cooling.
  • Using to remove heat from the glass of the object to be cooled Using to remove heat from the glass of the object to be cooled.
  • inevitable and passive temperature decrease in the process of cooling the glass plate for example, temperature decrease (cooling) due to the glass plate being transported and waiting on a transport device without heating means, etc. It also includes cooling.
  • rapid cooling refers to the rapid removal of the heat to be cooled using the above-described active cooling means at a cooling rate that is at least equal to or higher than that of cooling.
  • the rapid cooling means in this invention can remove the heat
  • the quenching means can also be used as a cooling means for performing normal cooling or slow cooling that removes heat more slowly than quenching by adjusting the cooling capacity to be small. Can also be included when not rapidly cooled.
  • This strengthening device is a device that forms a heated glass plate into a desired curved shape, and blows and strengthens the formed glass plate by a cooling medium such as air.
  • the strengthening device 1 of the present embodiment includes a conveying unit 2 that conveys a glass plate on a reference surface S, a heating unit 3 that heats the glass plate, and a molding that shapes the glass plate into a curved shape.
  • a means 5, a rapid cooling means 6 for rapidly cooling the glass plate, and a control means 7 for controlling the conveying means 2, the heating means 3, the forming means 5, and the rapid cooling means 6 are provided.
  • the heating unit 3 includes a preheating unit 4 that heats the glass plate to a temperature near the softening point of the glass plate, and a high-frequency heating unit 8 that further heats the glass plate formed into a curved shape by the forming unit 5.
  • the preheating means 4 and the forming means 5 are arranged in the same heating furnace.
  • the reference plane is a plane defined by a plurality of transport rollers, and substantially coincides with a plane including a group of contact points between the transport rollers and the lower surface of the glass plate G to be transported.
  • the reference surface S is a substantially horizontal surface
  • a curved surface that is curved or inclined in the transport direction or the width direction as described later may be used as the reference surface.
  • the transport direction X is set parallel to the reference plane S, that is, parallel to the horizontal plane.
  • the width direction Y is parallel to the reference plane S and is orthogonal to the transport direction X.
  • the transport means 2 is a roller conveyor in the present embodiment, and is arranged in parallel with the transport direction X for transporting the glass plate and supported by a plurality of rollers (supports) 9 and a roller 9 (not shown) that drives the rollers 9. And a roller drive motor.
  • Each roller 9 is supported so as to be rotatable about an axis 9 a parallel to the width direction Y.
  • At least the roller 9 provided adjacent to the high frequency heating means 8 is formed of an insulator such as ceramics and is electrically insulated from the high frequency heating means 8.
  • the roller 9 is supporting the glass plate by contacting the lower surface (surface) of a glass plate.
  • the conveying means 2 conveys the glass plate in the conveying direction X by rotating or stopping the plurality of rollers 9 around the axis 9a as desired by a roller driving motor, and preheating.
  • the means 4, the forming means 5, the high-frequency heating means 8, and the rapid cooling means 6 can be passed in this order.
  • the preheating means 4 has a heat source part 4a for heating the flat glass plate W1.
  • the heat source unit 4a can heat the glass plate W1 to a temperature near the softening point (for example, about 720 ° C.) at which the glass plate can be formed.
  • the temperature near the softening point mentioned here means at least a temperature of the annealing point (for example, about 550 ° C.) or more, more specifically, a temperature of the annealing point or more and the softening point or less. means.
  • the forming means 5 has a known forming apparatus such as a press unit 5a, and forms the glass plate W1 into a curved glass plate W2 by the press unit 5a.
  • the roller 9 may be stopped and deformed to function as a lower mold (receiving mold), or a separate lower mold 5b may be provided to support the glass plate instead of the roller 9.
  • the press unit 5a curves the glass plate W1 so that the cross-sectional shape of the glass plate W2 becomes a desired shape.
  • the 2A includes a forming means 5 'instead of the forming means 5 of the strengthening apparatus 1 in FIG.
  • the forming means 5 ′ includes a roller forming unit 5 c for efficiently forming a glass plate while being conveyed instead of the press unit 5 a of the forming means 5. Forming by the roller forming unit 5c is performed by moving a plurality of rollers 9 arranged on the reference surface S vertically up and down perpendicularly to the transport surface S according to the transport position in the transport direction X of the glass plate. Form.
  • FIG. 3 is a schematic longitudinal sectional view of the A1-A1 cross section in FIG.
  • a plurality of transport rollers 9 arranged in the width direction Y are attached so as to be independently movable up and down by the position adjusting means 10, moved according to the transport position of the glass plate W ⁇ b> 2 and curved.
  • the high-frequency heating means 8 includes an electrode unit 12 that applies a high frequency to the glass plate W2 to heat the glass plate W2, a power source unit 13 that applies a high-frequency voltage to the electrodes 16 and 17, and a reference plane of the electrodes 16 and 17.
  • electrode arrangement adjusting means 14 capable of adjusting the distance to S.
  • the electrode portion 12 includes a pair of supply electrodes 16 and a passive electrode 17 that are disposed to face each other with the glass plate W2 interposed therebetween, and is formed of a conductor such as metal.
  • a conductor such as metal.
  • five rows are arranged in the transport direction X and three rows are arranged in the width direction Y.
  • each electrode portion 12 is opposed to the supply electrode 16 disposed above the glass plate W ⁇ b> 2 and the supply electrode 16 on the opposite side of the glass plate W ⁇ b> 2 from the supply electrode 16.
  • the disposed passive electrode 17, the plurality of feed points 18 provided at intervals in the width direction Y on the supply electrode 16 and the passive electrode 17, and the power supply unit 13 are connected to each of the feed points 18.
  • the electrode wiring 19 is provided. That is, among the electrodes 16 and 17 described above, the electrode disposed on the upper side (one side) with respect to the glass plate W2 is the supply electrode 16, and the electrode disposed on the lower side (the other side) is the passive electrode 17.
  • the supply electrode 16 is formed in a flat plate shape, and is disposed above the reference surface S so as to be parallel to the reference surface S.
  • the passive electrode 17 is formed in a flat plate shape, and is disposed below the reference plane S so as to face the supply electrode 16.
  • the length in the conveyance direction X of the supply electrode 16 and the passive electrode 17 is set to about 30 mm.
  • two feeding points 18 are provided on the upper surface of the supply electrode 16 in this embodiment.
  • the electrode wiring 19 is formed so that the distances L1 and L2 along the electrode wiring 19 from the connection position P1 connected to the power supply unit 13 to each feeding point 18 are substantially equal.
  • two feeding points 18 are provided on the lower surface of the passive electrode 17. Since the configuration of the electrode wiring 19 connected to the passive electrode 17 is the same as the configuration of the electrode wiring 19 connected to the supply electrode 16, description thereof is omitted. Since the passive electrode 17 does not have the above-described discharge problem, the arrangement of the electrode wiring 19 connected to the passive electrode 17 is not necessarily the same as that of the electrode wiring 19 connected to the supply electrode 16, but is similar. May be arranged.
  • a conductor such as a frame may be disposed near the passive electrode 17.
  • the supply electrode 16 is provided on the upper side of the glass plate W2 and the passive electrode 17 is provided on the lower side is shown.
  • the arrangement of the electrodes 16 and 17 in the present invention is not limited to this, and the high frequency is from the bottom to the top.
  • a supply electrode may be provided on the lower side of the glass plate W2 and a passive electrode may be provided on the upper side so as to be applied.
  • the number of feeding points 18 provided on the supply electrode 16 and the passive electrode 17 is not limited and may be any number.
  • the supply electrode 16 and the passive electrode 17 forming a pair constituting one electrode unit 12 are connected to the power supply unit 13 via a feeding point 18 and an electrode wiring 19.
  • Each power supply unit 13 is configured to independently adjust a high-frequency voltage applied between a pair of the connected supply electrode 16 and passive electrode 17.
  • the three electrode portions 12 arranged in the width direction Y constitute an electrode row 12A.
  • the high-frequency heating unit 8 has a configuration in which five electrode rows 12A are arranged in the transport direction X.
  • the number of electrode portions 12 arranged in the width direction Y per electrode row 12A may be any number as long as it is plural. Further, the number of electrode rows 12A arranged side by side in the transport direction X is not limited and may be any number.
  • the electrode arrangement adjusting means 14 has a main body portion 14b and a pair of rod-shaped rack gears 14a that are slidable with respect to the main body portion 14b.
  • Each rack gear 14a extends in the vertical direction, and one end thereof is driven by a rotation shaft of a gear drive motor (not shown) provided in the main body portion 14b, so that the rack gear 14a can move in the vertical direction. It has become.
  • the rack gear 14a is formed of an insulator such as ceramics or PPS (polyphenylene sulfide resin).
  • the electrode arrangement adjusting means 14 arranged above the reference plane S is arranged so that the rack gear 14 a is positioned below the main body 14 b, and the other end of each rack gear 14 a is connected to the supply electrode 16. Connected to the top surface. And the electrode arrangement
  • the electrode arrangement adjusting means 14 arranged below the reference plane S is arranged so that the rack gear 14a is positioned above the main body 14b, and the other end of each rack gear 14a is connected to the passive electrode 17. Connected to the bottom surface. And the electrode arrangement
  • each electrode arrangement adjusting means 14 independently adjusts the distance of the supply electrode 16 and the passive electrode 17 from the reference plane S by moving the supply electrode 16 and the passive electrode 17 in the vertical direction. It is configured to be able to.
  • the high frequency heating means 8 can heat the glass plate W2 from the inside of the glass plate W2.
  • the power supply unit 13 applies a high frequency voltage of 27.12 MHz to the electrode unit 12.
  • the frequency of the high frequency voltage which can be applied in the power supply part 13 is not restricted to this.
  • the frequency of the high-frequency voltage in the present invention can be appropriately determined based on the practical electrode voltage, the dielectric loss of the heating target, etc., but is preferably 1 MHz to 100 MHz, and more preferably 10 to 50 MHz.
  • the frequency of the high-frequency voltage in the high-frequency heating is low, the standing wavelength in the electrode becomes long, which is advantageous for uniform heating, and if the frequency is high, it can be heated at a low voltage and is difficult to discharge.
  • the rapid cooling means 6 has a plurality of nozzles 30 and 31 each having an opening 24 at the tip, and is arranged with the openings 24 facing both surfaces in the thickness direction (vertical direction) of the glass plate W2.
  • Nozzle portion 25 chamber unit (discharge means) 26 for discharging air (cooling medium) from the opening 24, and nozzle arrangement adjusting means 27 (see FIG. 3) capable of adjusting the distance from the reference plane S of the nozzles 30 and 31.
  • the nozzles 30 and 31 are formed of the same insulator as that of the rack gear 14 a and are electrically insulated from the high-frequency heating unit 8. Of the nozzles 30 and 31, the nozzle 30 is disposed above the glass plate W2, and the nozzle 31 is disposed below the glass plate W2.
  • the nozzle 30 is formed in a tubular shape extending in the vertical direction, and an opening 24 is formed at the lower end of the nozzle 30.
  • the nozzles 30 are arranged above the reference plane S, with 10 rows in the transport direction X and 3 rows in the width direction Y.
  • the nozzle 31 is formed in a tubular shape extending in the vertical direction, and an opening 24 is formed at the upper end of the nozzle 31.
  • the nozzle 31 is arranged below the reference plane S so that its own opening 24 and the opening 24 of the nozzle 30 face each other.
  • the nozzle 30 and the nozzle 31 which become a pair facing the up-down direction are located in a line in the width direction Y, and comprise the nozzle row 30A.
  • the rapid cooling means 6 has a configuration in which ten nozzle rows 30A are arranged in the transport direction X. Note that an opening row is formed by the openings 24 formed in the three nozzles 30 constituting one nozzle row 30A and the openings 24 formed in the three nozzles 31.
  • ten nozzle rows 30 ⁇ / b> A arranged in the transport direction X are composed of five groups of adjacent nozzle rows 30 ⁇ / b> A, and each of the five electrode rows 12 ⁇ / b> A is transported in the transport direction. It is arranged so as to be sandwiched between X. Furthermore, as illustrated in FIG. 5, each nozzle 30 is disposed at a position where the openings 24 of the nozzles 30 adjacent to the transport direction X do not overlap when viewed from the transport direction X.
  • the opening 24 of the nozzle 30a adjacent to the transport direction X and the opening 24 of the nozzle 30b do not overlap with the transport direction X, but the opening of the nozzle 30a adjacent to the transport direction X with the nozzle 30b interposed therebetween. 24 and the opening 24 of the nozzle 30c are configured to overlap in the transport direction X.
  • the supply electrode 16 and the nozzle 30 and the passive electrode 17 and the nozzle 31 are arranged close to each other so as not to contact each other.
  • the shortest distance L3 (see FIG. 5) between the supply electrode 16 and the nozzle 30 is preferably set to 1 mm or more and 30 mm or less.
  • the chamber unit 26 includes a blower 34 that supplies air, and an air supply unit 35 that guides the air from the blower 34 to the nozzle unit 25.
  • the air supply unit 35 includes a distribution duct 36 for distributing air from the blower 34, and an upper chamber (wind box) 37 that is disposed above the nozzle 30 and communicates with the distribution duct 36 and the upper end of the nozzle 30.
  • a distribution duct 36 disposed below the nozzle 31 and a lower chamber (wind box) 38 communicating with the lower end of the nozzle 31 are provided.
  • the upper chamber 37 and the lower chamber 38 are arranged side by side in the transport direction X, and supply air as a cooling medium to the nozzles 30 and 31, respectively.
  • nozzles 30 and 31 constituting the set of adjacent nozzle rows 30A arranged so as to sandwich one electrode row 12A in the transport direction X, six nozzles 30 communicate with one upper chamber 37, and 6
  • One nozzle 31 is configured to communicate with one lower chamber 38.
  • the opening 24 and the supply electrode 16 of the nozzle 30 are arranged at a position overlapping the upper chamber 37 in plan view.
  • the nozzle arrangement adjusting means 27 is attached in the upper chamber 37 and the lower chamber 38 (the nozzle arrangement adjusting means 27 attached to the lower chamber 38 is not shown). Then, the nozzle 30 is moved up and down by a nozzle position adjusting motor (not shown) included in the nozzle arrangement adjusting means 27 so that the distance from the reference plane S of the opening 24 of each nozzle 30 can be adjusted independently. ing.
  • the nozzle arrangement adjusting means 27 can also move the nozzle 31 in the vertical direction.
  • the supply electrode 16, the passive electrode 17, the nozzle 30 and the nozzle 31 can independently adjust the distance from the reference plane S by the electrode arrangement adjusting means 14 and the nozzle arrangement adjusting means 27.
  • the control means 7 is electrically connected to the roller drive motor, the preheating means 4, the shaping means 5, the power supply unit 13, the gear drive motor, the blower 34, and the nozzle position adjusting motor (hereinafter referred to as “roller drive motor etc.”). Has been. And the control means 7 can control a roller drive motor etc. according to the information input from the input device not shown while supplying electric power to a roller drive motor etc.
  • the control means 7 drives the gear drive motor of the electrode arrangement adjusting means 14 to move the supply electrode 16 and the passive electrode 17 in the vertical direction, thereby appropriately adjusting the supply electrode 16 and the passive electrode 17. Move to the correct position. Specifically, for example, the minimum value of the distance from each supply electrode 16 to the glass plate W2 and the minimum value of the distance from each passive electrode 17 to the glass plate W2 are set to desired values. The positions of the electrodes 16 and 17 are adjusted. Further, by driving the nozzle position adjusting motor, the positions of the nozzle 30 and the nozzle 31 are adjusted in the same manner as described above.
  • the flat glass plate W1 is conveyed to the preheating means 4 by driving the roller drive motor of the conveying means 2, and is heated to a temperature at which it can be formed by the heat source unit 4a.
  • the heated glass plate W1 is transported to the forming means 5 ′ and formed by moving the transport roller 9 in the vertical direction by the roller forming unit 5c. Thereby, the curved glass plate W2 is obtained.
  • the glass plate W2 is transported between the supply electrode 16 and the passive electrode 17 when it is transported from the forming unit 5 ′ to the high-frequency heating unit 8 and the rapid cooling unit 6, and the power supply unit 13 supplies the supply electrode 16 and the passive electrode. 17 is appropriately heated by the high-frequency voltage applied between the glass plate W2 and the glass plate W2 so that the temperature of the glass plate W2 becomes a desired temperature regardless of the position in the transport direction X.
  • the high-frequency heating causes the glass plate W2 to generate heat from the inside with the full thickness in the thickness direction of the glass plate W2, so that the glass plate W2 is heated to a desired temperature regardless of the position in the thickness direction.
  • the glass plate W2 is heated by the electrode unit 12 at a position facing the glass plate W2, and at the same time, the opening 24 of the nozzle 30 and the opening 24 of the nozzle 31 are passed from the driven blower 34 through the air supply unit 35.
  • the glass plate W2 is rapidly cooled by the air blown on both sides in the thickness direction of the glass plate W2.
  • the nozzle 30 has one opening 24 at the tip thereof, and is arranged at a position where the openings 24 of the nozzles 30 adjacent to the transport direction X do not overlap when viewed in the transport direction X. Has been. For this reason, a part of the air blown downward from the nozzle 30 collides with the upper surface of the glass plate W ⁇ b> 2 as shown by an air stream line F, and then is exhausted through the space between the upper chambers 37. At this time, since the positions of the adjacent nozzles 30 do not overlap when viewed in the transport direction X, the air blown out from each nozzle 30 in the vicinity of the middle of the adjacent nozzles 30 between the upper chamber 37 and the glass plate W2. It is possible to suppress the flow velocity from decreasing due to the collision. As a result, the cooling efficiency is increased and the glass plate W2 can be efficiently strengthened.
  • the nozzle 31 also has the same air flow as the nozzle 30 but will not be described.
  • the glass plate W2 heated by high-frequency heating throughout the thickness direction and rapidly cooled with air on the surface side has a higher temperature on the center side and lower temperature on the surface side than the conventional strengthening method.
  • a large temperature distribution occurs.
  • compressive stress remains on the surface side of the glass plate W2
  • tensile stress remains on the center side, and the strength of the glass plate W2 Is increased.
  • it was possible to easily reinforce the glass plate and it became possible to reinforce a thin glass plate or a glass plate having high thermal conductivity, which was difficult to reinforce by conventional methods.
  • the electrode unit 12 is configured by applying a high-frequency voltage from the power supply unit 13 to the electrodes 16 and 17 whose distance to the reference plane S is adjusted by the electrode arrangement adjusting unit 14.
  • the glass plate W2 is heated by applying the high frequency generated from the glass plate W2, and at the same time, air is supplied from the chamber unit 26 to the nozzle unit 25 whose distance from the reference plane S is adjusted by the nozzle arrangement adjusting means 27. By blowing air from the opening 24, the surface of the glass plate W2 is rapidly cooled.
  • the high frequency generated from the electrode part 12 generates heat not only from the surface side in the thickness direction of the glass plate W2 but also from the inside, so that the glass plate W2 is heated by high frequency heating regardless of the position in the thickness direction. Is done.
  • the rapid cooling with air is performed on the surface of the glass plate W2.
  • the glass plate W2 has a temperature distribution in which the temperature on the center side is high and the temperature on the surface side is low. Furthermore, since the distance between the electrode part 12 and the nozzle part 25 with respect to the reference surface S is adjusted, heating and cooling of the glass plate W2 are performed uniformly or with a desired distribution in the width direction Y.
  • the glass plate W2 maintained at a temperature equal to or higher than the strain point is relieved of stress generated therein, and then the glass plate W2 is rapidly cooled, so that the surface of the glass plate W2 is compressed and stressed. A tensile residual stress is generated at the center of the direction, and the strength of the glass plate W2 is increased.
  • the position of the electrode portion 12 can be adjusted by the electrode arrangement adjusting means 14, and the position of the nozzle portion 25 can be adjusted by the nozzle arrangement adjusting means 27, respectively. And the distance between the electrode and the distance between the glass plate and the nozzle can be adjusted.
  • the electrode arrangement adjusting means 14 is driven up and down by a motor.
  • the electrode arrangement and nozzle arrangement adjusting means are not limited to this, and various well-known methods such as manual operation, hydraulic pressure, pneumatic pressure, etc. Various adjustment means can be employed.
  • the electrode part 12 and the nozzle part 25 of the high frequency heating means 8 and the electrode part 12 and the roller 9 are electrically insulated, the electrode part 12 of the high frequency heating means 8, the nozzle part 25 and the roller 9. It is possible to prevent discharge from occurring between the glass plate W2 and the glass plate W2 to be stably heated at high frequency.
  • the supply electrode 16 and the nozzle 30 are disposed close to each other, and the nozzle 30 is formed of an insulator. Thereby, it is possible to prevent discharge from occurring between the supply electrode 16 and the nozzle 30, and at the same time, heating and cooling can be performed at close positions. As a result, the temperature difference in the thickness direction of the glass plate W2 can be increased, and the glass plate W2 can be tempered more suitably.
  • a plurality of electrode arrangement adjusting means 14 are arranged along the width direction Y, and are configured such that the distances of the electrodes 16 and 17 from the reference plane S can be adjusted independently of each other.
  • the glass plate to be heated is curved in the width direction Y as in the glass plate W2, for example, the minimum value of the distance from the electrodes 16, 17 to the glass plate W2 is the width direction Y. It can be adjusted to a desired value regardless of the position. Therefore, the glass plate W2 can be heated more uniformly in the width direction Y, or can be heated with a desired temperature difference.
  • a plurality of electrode portions 12 are arranged in the transport direction X and the width direction Y. For example, in this embodiment, they are arranged in 5 rows in the transport direction X and 3 rows in the width direction Y. For this reason, when the temperature difference arises in the conveyance direction X in the glass plate W2, the amount of heat given to the glass plate W2 can be adjusted in the conveyance direction X. Moreover, since the power supply part 13 is comprised so that the high frequency applied to each electrode part 12 can be adjusted independently, the calorie
  • the air blown downward from the opening 24 of the nozzle 30 mainly collides with the upper surface of the glass plate W2 and then flows horizontally along the glass plate W2 and then moves upward. Exhausted. For this reason, the position of the opening 24 and the position where the air is directed upward are shifted in plan view.
  • FIG. 5 by arranging the opening 24 of the nozzle 30 so as to overlap the upper chamber 37, a space for discharging the air after cooling the glass is secured, and the flow of air is at the top. It can be prevented that it becomes difficult to flow under the influence of the chamber 37.
  • the supply electrode 16 is disposed at a position overlapping the upper chamber 37, so that the air flow that collides with the blown glass plate W ⁇ b> 2 downward from the opening 24 and flows upward is supplied to the supply electrode 16 and the upper chamber 37. Can be suppressed.
  • the same effect can be obtained with the lower chamber 38, the nozzle 31, and the passive electrode 17, but detailed description thereof is omitted.
  • the conveying means 2 has a roller 9 formed of an insulator and supporting the glass plate W2. Therefore, discharge can be prevented from occurring between the electrodes 16, 17 and the glass plate W2 and the roller 9, and the glass plate W2 can be stably heated at high frequency.
  • the electrode wiring 19 shown in FIG. 4 is formed so that the distances L1 and L2 along the electrode wiring 19 from the connection position P1 connected to the power supply unit 13 to the feeding point 18 are substantially equal. Thereby, conditions such as high-frequency voltage and phase at the respective feeding points 18 in the supply electrode 16 are matched. Therefore, it is possible to suppress the occurrence of discharge between the electrode portion 12 and the glass plate W2.
  • the electrode arrangement adjusting means 14 is configured to adjust the distance of the electrodes 16 and 17 from the reference plane S by moving the electrodes 16 and 17 in the vertical direction.
  • each electrode arrangement adjusting unit 41 not only moves the electrodes 16 and 17 in the vertical direction, but also forms a pair of electrodes 16 and 17 on the virtual plane T orthogonal to the transport direction X. May be configured so as to be rotatable around a common center point 41a, and the electrodes 16, 17 may be configured to be rotatable with respect to different centers.
  • the electrode arrangement adjusting means 41 is, for example, an electrode circuit (not shown) that rotates the gear drive motor of the electrode arrangement adjusting means 14 of this embodiment and the paired supply electrode 16 and passive electrode 17 around a common center point 41a. You may have a dynamic motor.
  • the electrode arrangement adjusting means 41 in this way, the distance between the supply electrode 16 and the glass plate W2 can be made substantially constant regardless of the position in the width direction Y.
  • the range in which the supply electrode 16 and the passive electrode 17 are opposed to each other can be widened as compared with the case where the supply electrode 16 and the passive electrode 17 that are paired do not rotate around a common center point.
  • the curved glass plate W2 can be heated uniformly regardless of the position in the width direction Y. Furthermore, since the variation in the distance between the supply electrode 16 and the glass plate W2 becomes small, it is possible to prevent the discharge from occurring.
  • the supply electrode (electrode) 45 and the passive electrode (electrode) 46 constituting the electrode portion 44 are each a planar electrode, and are deformed into a planar shape corresponding to the curved shape of the glass plate W2. It may be composed of possible electrodes.
  • the surface shape corresponding to the curved shape of the glass plate W2 is, for example, a shape in which the distance between the upper surface of the glass plate W2 and the lower surface of the supply electrode 45 is a substantially constant distance L5 regardless of the position in the width direction Y. is there.
  • the distal ends of support members (not shown) that are supported by the electrode arrangement adjusting means 14 and extend in the vertical direction and are arranged side by side in the width direction Y are fixed to the supply electrode 45, and the base ends of the respective support members Are movable independently in the vertical direction by a support member moving motor (not shown).
  • the passive electrode 46 can have the same configuration.
  • the electrode portion 44 By configuring the electrode portion 44 in this way, the glass plate W2 can be heated uniformly regardless of the position in the width direction Y. Furthermore, since the difference in distance between the supply electrode 45 and the passive electrode 46 and the glass plate W2 becomes small, it is possible to prevent discharge from occurring.
  • the glass plate W1 is heated by the preheating means 4 and then formed by the forming means 5 ′.
  • the glass plate W1 is first heated by the high frequency heating means 8, and then the heated glass plate W1 is conveyed by the conveying means 2 in the direction opposite to the conveying direction X, You may shape
  • the electrode 16 and the nozzle 30 formed of an insulator and the roller 9 of the transport unit 2 are disposed close to each other.
  • discharge from the electrode may be prevented by taking a sufficient distance between the electrode and a mechanism around the electrode unit such as a nozzle or a roller. This is because unnecessary discharge can be reduced if the distance between the electrode part and the conductor arranged closest to the electrode part is longer than the distance between the electrodes.
  • the shortest distance L3 (see FIG. 5) between the electrode 16 and the nozzle 30 is the distance between the supply electrode 16 and the passive electrode 17 (when the distance between the supply electrode 16 and the passive electrode 17 is adjustable).
  • Is preferably set to be longer than the longest distance that can be set between the electrodes 16 and 17, and if it is three times or more, no discharge occurs even if the nozzle 30 is not formed of an insulator. By configuring in this way, it is possible to more reliably prevent discharge from occurring between the electrode 16 and the nozzle 30.
  • the user manually adjusts the vertical position of the supply electrode 16 and the passive electrode 17 and the vertical position of the opening 24 of the nozzle 30 and the opening 24 of the nozzle 31.
  • the position may be fixed by tightening with a screw or the like.
  • the reference surface S is a plane parallel to the horizontal plane.
  • the reference surface S1 has a one-dimensional curvature upward as it goes to the downstream side in the transport direction X as shown in FIG. It may be a curved surface with a cylindrical outline having a curvature, and as shown in FIG. 11, the reference surface S2 may be a rotationally symmetric cone-shaped surface having a two-dimensional curvature.
  • the desired curved shape can be obtained by the weight of the glass plate while moving on the reference surface without moving the individual rollers and high-frequency heating electrodes as the glass plate passes.
  • the structure of a high frequency heating means is not limited to this, The structure of heating means, such as another well-known electrode and a power supply, is employ
  • the above-mentioned embodiment demonstrated the example using the air discharged
  • the cooling medium is not limited to air.
  • the cooling medium may be a fluid, and a liquid, a gas, a mixture of a liquid and a gas, or the like can be appropriately employed. Further, the composition of the cooling medium is not particularly limited, and nitrogen, carbon dioxide, and the like can be used in addition to air.
  • the present invention can increase the temperature difference between the surface and the center of the glass plate, the glass plate with a thinner plate thickness can be suitably strengthened. It can be suitably used as a safety glass plate for vehicle windows.
  • a glass plate having a thickness of 2.8 mm or less can be efficiently strengthened. Since a 2.8 mm glass plate can be easily produced by a conventional molding method, it can be easily applied to existing production facilities and can efficiently produce a thin tempered glass plate.
  • a tempered glass plate having a thickness of 2.5 mm or less or 2.0 mm or less it becomes possible to produce a tempered glass plate having a thickness of 2.5 mm or less or 2.0 mm or less, thereby realizing a production of a safety glass plate for a vehicle window having a thin plate thickness which has been difficult to produce.
  • it contributes to weight reduction of the vehicle such as an automobile, and the fuel efficiency of the vehicle is improved.
  • by reducing the thickness of the glass plate raw materials necessary for the production of the glass plate are also reduced, so that energy necessary for the production of the glass plate can be saved and an environmentally friendly tempered glass plate can be provided.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

L'invention porte sur un dispositif pour mouler et renforcer une plaque de verre, lequel dispositif peut appliquer un chauffage à haute fréquence et un refroidissement rapide à celle-ci vis-à-vis de la forme de celle-ci tout en transportant celle-ci. Un dispositif pour mouler et renforcer une plaque de verre (1A) comprend : des moyens de transport (2) qui transportent une plaque de verre (W2) sur un plan de référence (S); des moyens de chauffage pour chauffer la plaque de verre qui a été formée sous une forme incurvée; et des moyens de refroidissement rapide (6) qui refroidissent rapidement la plaque de verre par pulvérisation d'un milieu de refroidissement sur les deux surfaces dans la direction de l'épaisseur de celle-ci. Les moyens de chauffage comprennent : une section électrode (12) contenant des électrodes (17, 16) qui chauffent la plaque de verre par application d'ondes haute fréquence à celle-ci; une alimentation en électricité (13) qui délivre une tension haute fréquence aux électrodes; et des moyens de réglage de configuration d'électrodes (14) qui peuvent régler la distance du plan de référence des électrodes. Les moyens de refroidissement comprennent : une section buse (25) contenant des buses (30, 31) ayant des ouvertures (24) situées aux pointes de celles-ci, laquelle section est disposée de telle sorte que les ouvertures font face aux deux surfaces de la plaque de verre dans la direction de l'épaisseur de celle-ci; et des moyens de décharge qui déchargent le milieu de refroidissement à partir des ouvertures de buse. La section électrode, les buses et le mécanisme de transport sont électriquement isolés.
PCT/JP2011/058128 2010-03-30 2011-03-30 Dispositif pour mouler et renforcer une plaque de verre, et procédé de fabrication pour plaque de verre WO2011122679A1 (fr)

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JP2010-079665 2010-03-30
JP2010079665A JP2013126922A (ja) 2010-03-30 2010-03-30 ガラス板の成形強化装置およびガラス板の製造方法

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2565168A1 (fr) * 2011-08-31 2013-03-06 Samsung Corning Precision Materials Co., Ltd. Procédé et appareil de trempe du verre
EP2554522A4 (fr) * 2010-03-30 2015-07-29 Asahi Glass Co Ltd Procédé pour renforcer une feuille de verre, et dispositif pour celui-ci
CN105174698A (zh) * 2015-09-09 2015-12-23 浙江星星瑞金科技股份有限公司 一种可穿戴式智能设备的3d玻璃面板的加工方法
CN112679076A (zh) * 2021-01-05 2021-04-20 广东南星玻璃有限公司 一种用于玻璃热弯装置的模具及基于模具的成形方法

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Publication number Priority date Publication date Assignee Title
JP2005162517A (ja) * 2003-12-01 2005-06-23 Asahi Glass Co Ltd 強化ガラスの製造方法
JP2005179124A (ja) * 2003-12-19 2005-07-07 Asahi Glass Co Ltd ガラス板の曲げ成形方法及びその装置
JP2006500308A (ja) * 2002-09-19 2006-01-05 プレマカラン ティ． ボアズ、 ガラスを同時に加熱及び冷却して強化ガラスを製造するためのシステム及び方法
JP2009515811A (ja) * 2005-11-29 2009-04-16 ピーピージー・インダストリーズ・オハイオ・インコーポレイテッド 板ガラスの強化装置及び方法

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2006500308A (ja) * 2002-09-19 2006-01-05 プレマカラン ティ． ボアズ、 ガラスを同時に加熱及び冷却して強化ガラスを製造するためのシステム及び方法
JP2005162517A (ja) * 2003-12-01 2005-06-23 Asahi Glass Co Ltd 強化ガラスの製造方法
JP2005179124A (ja) * 2003-12-19 2005-07-07 Asahi Glass Co Ltd ガラス板の曲げ成形方法及びその装置
JP2009515811A (ja) * 2005-11-29 2009-04-16 ピーピージー・インダストリーズ・オハイオ・インコーポレイテッド 板ガラスの強化装置及び方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2554522A4 (fr) * 2010-03-30 2015-07-29 Asahi Glass Co Ltd Procédé pour renforcer une feuille de verre, et dispositif pour celui-ci
EP2565168A1 (fr) * 2011-08-31 2013-03-06 Samsung Corning Precision Materials Co., Ltd. Procédé et appareil de trempe du verre
CN105174698A (zh) * 2015-09-09 2015-12-23 浙江星星瑞金科技股份有限公司 一种可穿戴式智能设备的3d玻璃面板的加工方法
CN112679076A (zh) * 2021-01-05 2021-04-20 广东南星玻璃有限公司 一种用于玻璃热弯装置的模具及基于模具的成形方法

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