WO2011122680A1 - Dispositif pour former/renforcer une feuille de verre et procédé pour produire une feuille de verre - Google Patents

Dispositif pour former/renforcer une feuille de verre et procédé pour produire une feuille de verre Download PDF

Info

Publication number
WO2011122680A1
WO2011122680A1 PCT/JP2011/058130 JP2011058130W WO2011122680A1 WO 2011122680 A1 WO2011122680 A1 WO 2011122680A1 JP 2011058130 W JP2011058130 W JP 2011058130W WO 2011122680 A1 WO2011122680 A1 WO 2011122680A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass plate
electrode
glass sheet
strengthening
nozzle
Prior art date
Application number
PCT/JP2011/058130
Other languages
English (en)
Japanese (ja)
Inventor
勲 斎藤
清太 宮崎
聡 吉田
智裕 諏訪
順士 堀
Original Assignee
旭硝子株式会社
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 旭硝子株式会社 filed Critical 旭硝子株式会社
Publication of WO2011122680A1 publication Critical patent/WO2011122680A1/fr

Links

Images

Classifications

    • 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
    • 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
    • C03B23/0307—Press-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
    • C03B27/0445—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 adapted to the bend of the sheet

Definitions

  • the present invention relates to a glass sheet forming and strengthening apparatus and method, and more particularly to a glass sheet forming and strengthening apparatus and a manufacturing method capable of suitably strengthening a thin glass sheet.
  • the standard of a tempered glass sheet may be defined by the number of pieces per unit area when broken. For example, in automotive safety glass, the number of pieces is 40 to 400 within a range of 50 millimeters (mm) square. It is required to fall within the range.
  • the glass plate to be manufactured is not flat and has a curved shape
  • the glass plate is formed into a desired shape and then tempered.
  • a shaping strengthening apparatus what performs what is called a shuttle type conveyance using the support body which supports the peripheral part of a glass plate is known (for example, refer patent document 1).
  • a molding strengthening apparatus that performs shuttle type conveyance
  • it is relatively easy to form a residual stress pattern in the plane direction because the glass plate can be stopped and cooled.
  • a safety glass plate for automobiles is required to have a thinner glass plate (thickness of 3.0 mm or less, hereinafter referred to as “thin plate”) for further weight reduction.
  • thin plate thinner glass plate
  • the plate thickness of the glass plate decreases, it becomes more difficult to create a temperature difference in the plate thickness direction, so it is difficult to increase the residual stress in the plate thickness direction. Therefore, if a thin tempered glass plate is to be manufactured by a molding strengthening apparatus that performs shuttle type conveyance, the ratio that depends on the effect of the residual stress pattern in the planar direction increases.
  • the normal heating method can only cool the surface rapidly after heating the glass plate to a predetermined temperature, so that the surface of the glass plate has marks on the support or the glass plate breaks due to excessive cooling. There is a problem of causing a so-called cooling crack.
  • Patent Document 2 discloses that high-frequency dielectric heating (hereinafter, simply referred to as “high-frequency heating”) is used to heat the glass plate from the inside and simultaneously cool the surface, and then rapidly cool and strengthen. It is described to do.
  • high-frequency heating hereinafter, simply referred to as “high-frequency heating”
  • the surface is cooled while the inside of the glass plate is heated, so that it is easy to create a temperature difference and to form a residual stress or a residual stress pattern.
  • the inventors have found that there are the following problems in strengthening a glass plate using high-frequency heating. That is, when a high frequency voltage is applied to the electrode for performing high frequency heating, the glass plate itself also has a potential, so that a discharge is generated between points having a lower potential. For example, discharge may occur between the electrode and the support that is in direct contact with the glass plate, or between the electrode and a nozzle or the like for cooling the surface of the glass plate. When discharge occurs, high-frequency heating cannot be performed, so the upper limit of the high-frequency voltage that can be applied is limited to a value that does not cause discharge. As a result, there is a problem that it is difficult to ensure the heating capacity necessary for the strengthening treatment.
  • the present invention has been made in view of the above circumstances, and is a glass plate formed into a three-dimensionally curved glass plate conveyed by a conveying means using a support that supports the peripheral edge of the glass plate. Even if it exists, it is possible to perform high frequency heating and cooling according to its shape while supporting or transporting the glass plate, and at that time, it prevents the discharge from the high frequency heating electrode and suitably strengthens the glass plate.
  • a glass sheet forming / strengthening apparatus that can be processed. Thereby, even if it is a thin glass plate, it aims at providing the shaping
  • a glass sheet shaping and strengthening apparatus includes a conveying means for conveying a glass sheet, a shaping means for shaping the glass sheet into a curved shape, and the molded glass sheet near a softening point.
  • the cooling means has a plurality of nozzles provided with openings at the tips, a nozzle portion disposed with the openings facing both surfaces in the plate thickness direction of the glass plate supported at the predetermined position, and the openings
  • the nozzle part is further provided with a nozzle arrangement adjusting means that is formed of an insulator and is arranged in the vicinity of the electrode part and capable of adjusting a distance between the nozzle part and the glass plate supported at the predetermined position. Also good.
  • the total value of the areas of the plurality of openings may be set to 3 percent or more and 10 percent or less of the area of both surfaces in the thickness direction of the formed glass plate.
  • the electrode portion is formed in a plate shape, and has, as the electrode, a pair of electrodes arranged to face each other in the plate thickness direction of the glass plate, and a surface of the electrode facing the glass plate
  • the total value of the areas may be set to 15% or more and 35% or less of the area of both surfaces in the thickness direction of the formed glass plate.
  • the distance between the conductor disposed closest to the electrode part and the electrode part may be longer than the distance between the paired electrodes.
  • the electrode section includes a plurality of electrodes arranged in pairs, and each of the supply electrodes has a power supply point to which the high-frequency voltage is applied, and an electrode wiring that connects the power supply point and the power supply section.
  • the electrode wiring may be formed such that the electrical distance between each of the feeding points and the power supply unit is equal.
  • the electrode wiring may be disposed on an outer surface of the nozzle portion.
  • the positions of the plurality of openings may be set corresponding to the curved shape.
  • the nozzle portion may be formed by connecting the plurality of nozzles in a plate shape or a lattice shape, and may include a plurality of openings on a surface facing the glass plate supported at the predetermined position.
  • the second aspect of the present invention is a method for producing a glass plate using the glass sheet shaping and strengthening apparatus of the present invention.
  • the glass plate conveyed by the conveying means using the support that supports the peripheral portion of the glass plate is molded into a three-dimensionally curved shape. Even if it is a glass plate, high frequency heating and cooling can be performed according to the shape while supporting or conveying the glass plate.
  • strengthening apparatus which can prevent that discharge arises from the electrode for high frequency heating in that case, and can strengthen a glass plate suitably can be provided. Thereby, even if it is a thin glass plate, a strengthening process can be performed suitably.
  • strengthening apparatus It is a perspective view which shows a part of said 1st unit. It is a schematic diagram which shows the arrangement
  • heating refers to general heat generation by applying energy to a heating object (glass plate), and is not necessarily limited to increasing the temperature of the surface or the inside of the heating object.
  • a heating object glass plate
  • 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.
  • FIG. 1 is a schematic vertical cross-sectional view showing the overall configuration of a glass sheet shaping and strengthening apparatus (hereinafter simply referred to as “strengthening apparatus”) 1 of the present embodiment.
  • the strengthening device 1 is a device for forming and strengthening a glass plate into a predetermined curved shape, and as shown in FIG. 1, a forming means 10 for forming the glass plate into a curved shape and a heating means 5 for heating the glass plate. And a quenching means 30 for cooling the glass plate, and a transport support part (transport means) 40 for transporting the glass plate and supporting it at a predetermined position.
  • the heating means 5 includes a heating furnace (preheating means) 11 for heating the glass plate G to a temperature near the softening point and a high-frequency heating means 20 for heating the glass plate formed by the forming means 10.
  • the forming means 10 includes a forming furnace 12 that forms the glass sheet G heated in the heating furnace 11 into a curved shape.
  • the glass plate G placed on the press ring (lower press die) 15 is carried into the heating furnace 11 by the shuttle 13 and heated to a predetermined temperature near the softening point by a heating mechanism such as a heater (not shown).
  • the forming furnace 12 has a known configuration including a mold (upper mold) 14 and presses the glass plate G on the press ring 15 with the mold 14 to form a predetermined curved shape.
  • the high-frequency heating means 20 and the rapid cooling means 30 are arranged in the strengthening processing unit 2 installed adjacent to the molding furnace 12.
  • the glass plate G formed by the forming means 10 is transported by the transport support unit 40 and supported at a predetermined position in the strengthening processing unit 2.
  • the strengthening processing unit 2 includes a first unit 3 disposed on the upper side of the glass plate G supported at a predetermined position, and a second unit 4 disposed on the lower side of the glass plate G.
  • the rapid cooling means 30 has two nozzle parts, a first nozzle part 31 provided in the first unit 3 and a second nozzle part 32 provided in the second unit 4.
  • the first nozzle portion 31 and the second nozzle portion 32 each extend in a direction (hereinafter, referred to as “extension direction”) perpendicular to (including substantially orthogonal to) the conveyance direction D1 of the glass plate G, and are aligned in the conveyance direction.
  • extension direction a direction perpendicular to (including substantially orthogonal to) the conveyance direction D1 of the glass plate G
  • it is composed of a plurality of blade nozzles 33A and 33B.
  • the blade nozzles 33A and 33B are formed of an insulator such as ceramic or polyphenylene sulfide (PPS) resin.
  • FIG. 2 is a schematic plan view showing a state in which the first nozzle portion 31 of the first unit 3 is viewed from below.
  • Each blade nozzle 33 ⁇ / b> A is formed in a plate shape in which a plurality of nozzles each having an opening 34 at the tip are formed at intervals, and the plurality of openings 34 are connected.
  • the openings 34 are arranged so as to face both sides in the thickness direction of the glass sheet G supported at a predetermined position by the transport support unit 40, and are adjacent blade nozzles in the transport direction D1 when viewed from the transport direction D1. It is arranged so as not to overlap with the opening.
  • Each blade nozzle 33A is supplied with cooling air (cooling medium) from a blower (exhaust means) (not shown) and the like, and is directed from both openings 34 to both sides in the thickness direction of the glass plate G supported by the conveyance support unit 40. And sprayed.
  • cooling medium pressurized air may be used, or a fluid other than air may be used as the cooling medium.
  • the 1st nozzle part 31 of the 1st unit 3 was shown in FIG. 2, the 2nd nozzle part 32 and the blade nozzle 33B of the 2nd unit 4 are also comprised in substantially the same way.
  • the total value of the areas of all the openings 34 of the first nozzle part 31 and the second nozzle part 32 may be set as appropriate, it is 3 with respect to the total value of the areas of both sides in the thickness direction of the formed glass sheet G.
  • the percentage (%) or more and 10% or less is set, the strengthening process described later can be performed more suitably. If the area of the opening 34 is smaller than 3%, the amount of air discharged becomes too small, the cooling capacity is lowered, and it becomes difficult to obtain a desired cooling capacity. When the area of the opening 34 is larger than 10%, the amount of air to be exhausted increases too much, and in the air cooling strengthening device having a general-purpose structure, the flow rate of the discharged air is lowered, and the cooling capacity of the entire device is lowered. A specific optimum value can be calculated by a thermal history simulation or the like, and is set to 4.2% in the present embodiment.
  • each blade nozzle 33A, 33B corresponds to the shape of the glass plate G so that the distance between each opening 34 and the surface of the opposing glass plate G is substantially the same. Is set.
  • one blade nozzle may be set so that the dimension in the vertical direction differs at a position in the extending direction.
  • the high-frequency heating means 20 has a plurality of supply electrodes 21 arranged on the first unit 3 side and a plurality of passive electrodes 22 arranged on the second unit 4 side.
  • the supply electrode 21 is an electrode to which a high-frequency voltage is applied by being connected to a power supply unit described later, and is formed in a rectangular plate shape with a conductor such as metal. As shown in FIGS. 1 and 2, each supply electrode 21 has a blade nozzle 33 ⁇ / b> A that forms the first nozzle portion 31 so that the heating surface 21 ⁇ / b> S for heating the glass plate faces the supported glass plate G. Between the two openings 34.
  • the heating surface 21S of each supply electrode 21 includes two openings 34A located on both sides in the extending direction of the supply electrode 21, and openings 34B and 34C formed in the blade nozzle to which the heating electrode 21 is attached and the blade nozzle adjacent in the transport direction D1. It arrange
  • both ends 21W in the transport direction D1 of the supply electrode 21 are folded back so as to be separated from the supported glass plate G, and are parallel to the wall surfaces on both sides of the blade nozzle 33A in the transport direction D1. (Including parallel).
  • One end of each end 21W is provided with a feeding point 23 to which a high frequency voltage from the power source is supplied, and an electrode wiring 24 that electrically connects the supply electrode 21 and the power source is connected to the feeding point 23. ing.
  • Electrode arrangement adjusting means 27 for adjusting the height of the supply electrode 21 is provided at both ends 21W.
  • the electrode arrangement adjusting means 27 is made of an insulator and can move in the height direction of the blade nozzle 33A, thereby moving the supply electrode 21 and adjusting the distance from the glass plate G.
  • guides 28 are provided on the wall surface of the blade nozzle 33A on the wall surface of the blade nozzle 33A, guides 28 are provided on both sides in the extending direction across the both end portions 21W to assist the supply electrode 21 to move vertically.
  • Various known configurations such as a motor and a hydraulic cylinder can be employed as the drive unit of the electrode arrangement adjusting unit 27.
  • As a driving mode all the supply electrodes may be driven simultaneously or individually. Furthermore, it may be configured to drive every predetermined area, for example, in units of blade nozzles.
  • FIG. 4 is a schematic diagram showing an arrangement mode of the electrode wiring 24.
  • 16 supply electrodes 21 are connected to one power supply unit 25 through electrode wiring 24.
  • the electrode wiring 24 extending from the power supply unit 25 branches into two at the first branch point S1 and extends to two second branch points S2. At each second branch point S2, the electrode wiring 24 further branches into two and extends to two third branch points S3. Furthermore, the electrode wiring 24 branches into two at each third branch point S3 and extends to two fourth branch points S4.
  • electrode wiring 24 is extended from the 4th branch point S4 of a total of eight places to the feeding point 23 of each supply electrode 21, and the power supply part and each supply electrode 21 are electrically connected.
  • the length of the electrode wiring 24 between the first branch point S1 and each second branch point S2 is substantially equal. Further, the length of the electrode wiring 24 between the second branch point S2 and the third branch point S3 is substantially equal. Furthermore, the length of the electrode wiring 24 between the third branch point S3 and the fourth branch point S4 is substantially equal. The length of the electrode wiring 24 between the fourth branch point S4 and the feeding point 23 of each supply electrode 21 is also substantially equal. That is, as shown in FIG. 4, the electrode wiring 24 is arranged in a tournament table from the power supply unit 25 to each supply electrode 21, and the electrical distance between the power supply unit 25 and the feeding point 23 of each supply electrode 21 is All are almost identical.
  • the passive electrode 22 is formed in the same shape as the supply electrode 21 and is disposed in the second unit 4 in a manner substantially similar to that of the supply electrode 21, and thus detailed description thereof is omitted.
  • the power supply unit 25 and a ground (grounding means) (not shown) are connected to each other through the power supply unit 25. Since the passive electrode 22 has no discharge problem, the arrangement of the connected electrode wiring 24 is not necessarily the same as that of the electrode wiring connected to the supply electrode 21, but may be arranged in the same manner. . In this way, the glass plate G is heated by high-frequency heating as shown in FIG. 1 by the supply electrode 21, the passive electrode 22, the feeding point 23, and the electrode wiring 24 arranged in the first unit 3 and the second unit 4. An electrode portion 26 is configured.
  • the passive electrode 22 in the 1st unit 3 side may be arranged on the second unit 4 side, and the high frequency voltage may be applied in the reverse direction.
  • the total value of the area of the supply electrode 21 and the passive electrode 22 facing the glass plate G may be set as appropriate, it is 15% of the total value of the areas of both sides of the formed glass plate G in the plate thickness direction. If it is set to 35% or less, the strengthening process can be performed more suitably, and 20% to 30% is more preferable. If the area of the electrode is too small, the area where the electric field is generated is reduced, and the heating capability is lowered at the same applied voltage. If the applied voltage is increased to increase the heating capacity, problems such as discharge are likely to occur. On the other hand, if the area of the electrode becomes too large, it becomes difficult to secure a space necessary for exhausting a cooling medium such as air, and the exhaust flow velocity is reduced.
  • the cooling capacity relative to the heating capacity is insufficient, and the desired strengthening becomes difficult.
  • the electrode serving as the heating means and the opening serving as the rapid cooling means are too close to each other, and the temperature difference in the plane (XY plane) direction of the glass plate G is difficult to be applied.
  • the specific optimum value can be calculated by a thermal history simulation or the like, and is set to 26% in this embodiment.
  • the conveyance support part 40 has the support body 41 which supports the peripheral part of the glass plate G, as shown in FIG.
  • the support body 41 is formed in a ring shape, and the glass plate G formed into a predetermined shape in the molding furnace 12 is transported to the strengthening processing unit 2 while being placed on the support body (hereinafter referred to as a transport ring) 41.
  • the glass plate G is supported at a predetermined position between the first unit 3 and the second unit 4.
  • the first nozzle portion 31 and the second nozzle portion 32 described above are provided with nozzle arrangement adjusting means (not shown), and can adjust the distance from the glass plate G supported at the predetermined position.
  • the transport ring 41 is formed of an insulator at least at a portion in contact with the glass plate G.
  • an insulating contact member 43 may be disposed on the upper side of the base 42 formed of a conductor, or an insulating coating may be applied to the entire surface of the base 42.
  • the entire transport ring 41 may be formed of an insulator such as ceramic or PPS resin.
  • the operation at the time of use of the strengthening device 1 having the above configuration will be described.
  • the flat glass sheet G sent from the previous process is heated to a temperature near the softening point in the heating furnace 11 and is conveyed into the forming means 10 by the shuttle 13.
  • the glass plate G that has entered the forming means 10 is pressed between the mold 14 and the press ring 15 in the forming furnace 12 to be formed into a predetermined curved shape.
  • the glass plate G formed by the forming means 10 is supported by the transport ring 41 of the transport support unit 40 and is transported to the strengthening processing unit 2.
  • the transport ring 41 moves between the first unit 3 and the second unit 4, and the glass plate G is supported at a predetermined position in the strengthening processing unit 2 by the transport ring 41.
  • a strengthening process is performed on the glass plate G supported in the strengthening processing unit 2. Air is blown from the first nozzle portion 31 and the second nozzle portion 32 of the rapid cooling means 30, and both surfaces of the glass plate G in the thickness direction are cooled. Further, a high frequency voltage is applied from the power supply unit 25 to each supply electrode 21, and the glass plate G is heated from the inside of the glass to a temperature suitable for the strengthening treatment near the softening point or higher. Thereby, temperature distribution arises between the plate
  • a temperature distribution also occurs between immediately below (directly above) the electrode that is easily heated in a plan view and immediately below (directly above) the nozzle opening that is easily cooled.
  • the glass plate in which the temperature distribution is generated is cooled to room temperature after stress relaxation, it becomes a tempered glass plate in which a compressive stress is applied to the surface according to a known principle.
  • the above-mentioned cooling and heating may be performed simultaneously or sequentially, it is more preferable that high-frequency heating is started after the start of cooling. After completion of the strengthening process, the glass plate G is transported to the next process by the transport ring 41.
  • the glass plate G formed into a predetermined shape by the forming unit 10 is strengthened by the transport ring 41 of the transport support unit 40 and includes the high-frequency heating unit 20 and the rapid cooling unit 30. 2 is supported at a predetermined position. And the electrode part 26 of the high frequency heating means 20 performs high frequency heating, thereby heating the glass plate G from the inside and simultaneously the rapid cooling means 30 cooling the surface of the glass plate G so that the entire glass plate G is uniform or desired.
  • the glass plate G is heated with a temperature distribution, and the first nozzle portion 31 and the second nozzle portion 32 of the rapid cooling means 30 further cools both sides in the thickness direction of the glass plate G, whereby the strengthening process is performed.
  • the supply electrode 21 of the electrode portion 26 and the first nozzle portion 31 and the second nozzle portion 32 disposed around the supply electrode 21 are electrically insulated.
  • the conveyance ring 41 of the conveyance support part 40 is also electrically insulated between the supply electrode 21 and the said site
  • the glass plate G can be suitably heated by high frequency heating. As a result, even a thin glass plate can be suitably strengthened by forming a good residual stress pattern not only in the plate thickness direction but also in the plane direction.
  • the supply electrode 21 and the first nozzle part 31 and the second nozzle part 32 are electrically insulated by forming the first nozzle part 31 and the second nozzle part 32 with an insulator, so that If these nozzle portions are formed of a conductor as in the embodiment, even if they are arranged close enough to cause discharge, no discharge occurs.
  • the degree of freedom of arrangement of the nozzle portion is kept high, and an arrangement suitable for the strengthening process can be performed. As a result, 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.
  • each opening 34 of the quenching means 30 is set corresponding to the curved shape of the molded glass sheet G, the distance from the surface in the plate thickness direction of the glass sheet G facing each opening 34. Is substantially constant regardless of the position on the surface. Therefore, the air can be blown under more suitable conditions, and the strengthening process can be suitably performed.
  • each opening 34 of the quenching means 30 is set so as not to overlap with the opening of the adjacent blade nozzle in the transport direction D1 when viewed from the transport direction D1 of the glass plate G. Accordingly, the air blown from the opening 34 mainly travels in parallel with the glass plate G after hitting the glass plate G. At that time, it is difficult to collide with the air exhausted from the adjacent opening in the transport direction D1. As a result, the flow velocity of the air blown from the quenching means 30 does not decrease, the flow becomes smooth, and the glass plate G can be efficiently cooled by being discharged around the strengthening device 1 efficiently.
  • the supply electrode 21 is installed at the center of the rhombus R1 formed by four of the openings 34 of the quenching means 30, the supply electrode 21 and the first nozzle portion 31 connected to the four openings are provided. It is easy to make the distance to the wall surface uniform, and to stabilize the electrical environment around the supply electrode 21.
  • the electrode wiring 24 of the electrode part 26 is arranged in a tournament table shape and is formed so that the electrical distance between each of the feeding points 23 of each supply electrode 21 and the power supply part 25 is equal, the supply electrode It is difficult to generate a potential difference for each, and high-frequency heating can be performed more stably. Further, even if a part of the supply electrodes (for example, the supply electrode 21a shown in FIG. 4) is removed in order to optimize the area of the supply electrode 21 with respect to the area of the glass plate G, Therefore, the area of the electrode portion can be easily optimized.
  • the electrode wiring 24 is arranged on the outer surface of the blade nozzle of the rapid cooling means 30 along the outer surface, the electrode wiring 24 is less likely to obstruct air flow and can be cooled appropriately.
  • the electrode portion 26 is provided with the electrode arrangement adjusting means 27, the distance between the supply electrode 21 and the glass plate G can be adjusted without changing the position of the opening 34 of the quenching means 30. . As a result, the distance can always be optimized and the strengthening process can be performed under more favorable conditions.
  • the specific routing of the electrode wiring can be appropriately changed in addition to the above-described aspect.
  • the number of power supply units connected to the electrode unit, the number of supply electrodes connected to one power supply unit, the number of branches of the electrode wiring until reaching the supply electrode, etc. are appropriately determined by the designer or user Then, it may be reflected in specific routing. In this way, it is possible to freely adjust the performance and specifications of the strengthening device 1 as to how much the magnitude of the high frequency voltage applied to each supply electrode can be changed.
  • the power supply unit 25 of the high-frequency heating means 20 that heats the glass plate G from the inside applies a high-frequency voltage of 27.12 MHz to the electrode unit 26.
  • the frequency of the high frequency voltage that can be applied in the power supply unit 25 is not limited 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. If it is this range, it can implement at the frequency which can be used industrially by the law in Japan. If 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 difference between the strengthening device 51 of the present embodiment and the strengthening device 1 of the first embodiment is the configuration of the rapid cooling means and the high-frequency heating means.
  • components that are the same as those already described are assigned the same reference numerals and redundant description is omitted.
  • FIG. 5 is a perspective view showing the first unit 3a in the reinforcement processing section 2a of the reinforcement apparatus 51.
  • the plurality of blade nozzles 52 provided in the quenching means 30a have substantially the same structure as the blade nozzle 33A of the first embodiment, but the positions of the openings 34 are adjacent blade nozzles when viewed in the transport direction D. The only difference is that it is set so as to overlap with the opening.
  • the supply electrode 21 of the high-frequency heating means 20a is disposed on an insulating plate 53 formed in a lattice shape.
  • the plate 53 is configured by combining a plurality of first extending portions 54 extending in the first direction and second extending portions 55 extending in the second direction orthogonal to the first extending portion 54.
  • a virtual surface corresponding to the curved surface shape of the glass plate G formed as a whole is formed.
  • the interval between the first extending portions 54 arranged in parallel is the same as the interval between the blade nozzles 52 (including substantially the same, the same applies hereinafter), and the interval between the second extending portions 55 arranged in parallel is the same as that of the blade nozzle 52. It is the same as the interval between the formed openings 34.
  • a ventilation port 56 for allowing air blown from the opening to pass therethrough is formed.
  • a ventilation port 56 for allowing air blown from the opening to pass therethrough.
  • the supply electrode 21 is mounted on the first extending portion 54 and the second extending portion 55 at a position between the ventilation openings 56.
  • the plate 53 to which the supply electrode 21 is attached is arranged such that the first extending portion 54 overlaps the blade nozzle 52 in a plan view and each opening 34 overlaps the ventilation port 56 in a plan view. Accordingly, the supply electrode 21 is disposed along the blade nozzle 52 extending in the extending direction, and a part of the supply electrode 21 b is disposed at a position between the blade nozzles 52.
  • the electrode arrangement adjusting means 57 for adjusting the height of the high-frequency heating means 20 a is provided at the end of the plate 53.
  • the electrode arrangement adjusting means 57 is formed of an insulator and operates in the same manner as the electrode arrangement adjusting means 27 of the first embodiment to adjust the distance between the high frequency heating means 20a and the glass plate G.
  • the electrode arrangement adjusting means 57 is provided at the end of the second extending portion 55, but may be provided at the end of the first extending portion 54.
  • even a thin glass plate can form a good residual stress pattern in the plane direction and suitably perform the strengthening process. .
  • the supply electrode 21 can be easily installed in the region between the blade nozzles 52. Since the arrangement of the supply electrode affects the residual stress pattern transferred to the glass plate, a more detailed setting of the residual stress pattern is possible if the degree of freedom of arrangement of the supply electrode is improved. Therefore, in this embodiment, the shape of the plate can be set freely.
  • the first extending portion 54 may be arranged so as not to be orthogonal to the transport direction D1.
  • supply electrodes are installed on four sides instead of the center of the rhombus R1 described in the first embodiment.
  • the supply electrode may be arranged at the center of gravity of each triangle when the rhombus R1 is formed into two triangles with diagonal lines.
  • the angle formed by the first extending portion and the second extending portion may be set to a size other than a right angle.
  • you may comprise not only a grid
  • the position in the extending direction depends on the position in the extending direction.
  • a blade nozzle 64 bent so as to have a different position may be used.
  • the supply electrode 21 and the electrode wiring 24 can be arranged at the center of gravity of the equilateral triangle TR1 formed by the three openings 34.
  • the blade nozzle shape may be formed in a wave shape or a folding screen as long as a plurality of nozzles provided with openings facing the glass plate are connected.
  • a curvilinear shape such as a spiral shape may be used.
  • the nozzle portion may be formed in a lattice shape in which a plurality of blade nozzles are connected.
  • the shape of the lattice is not limited to that having a right angle, and a parallelogram, a honeycomb structure, or the like can be appropriately selected.
  • shapes such as a linear shape, a curved shape, and a lattice shape may be combined.
  • a plurality of normal tubular nozzles may be arranged to form a nozzle portion, or the upstream side of the plurality of tubular nozzles may be connected to a common wind box for supplying air. Good.
  • each part around the supply electrode such as the nozzle part, the conveying means, and the distance adjusting mechanism is formed of an insulator to be insulated from the electrode part
  • the electrode parts and the respective parts may be insulated by disposing the parts made of the conductors arranged closest to each other at positions sufficiently away from the electrode parts. For example, by installing the supply electrode and each part so that the distance between the supply electrode and the passive electrode is at least three times the distance between the supply electrode and the passive electrode (the maximum distance that can be set if the distance adjustment mechanism is variable), Discharge is sufficiently suppressed and the glass plate can be heated at a high frequency.
  • At least one supply electrode and at least one passive electrode in the electrode section may be provided, and can be appropriately set according to the size of the glass plate to be manufactured.
  • molds a glass plate in a curved shape was demonstrated in the example (in-furnace shaping
  • the example of the high frequency heating means provided with a supply electrode and a passive electrode was shown here, 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 press ring 15 and the conveyance ring 41 can also be combined.
  • the carrier ring as the support body 41 is also used as a lower die for pressing
  • the structure and function of a known press ring for example, a double ring structure or the shape of a glass plate formed by a part of the curvature of the ring
  • a mechanism that changes in accordance with the shape of the upper die of the press (a so-called turning mechanism) may be provided.
  • these mechanisms may operate by using the press operation in the pressing process as power, and may additionally include power such as electricity, hydraulic pressure, and air pressure for each function to operate independently.
  • the glass plate G demonstrated the example supported by the predetermined position in the reinforcement
  • the rapid cooling means or the heating means may be provided with a swing mechanism or a sliding mechanism.
  • the above-mentioned embodiment demonstrated the example using the air discharged
  • the cooling medium is not limited to air. That is, the cooling medium may be a fluid, and a liquid sprayed in a mist, 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 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 sheet having a thickness of 2.5 mm or less or 2.0 mm or less, thereby realizing a production of a safety glass 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.
  • Heating means 10 Forming means 11 Heating furnace (preheating means) 20, 20a High-frequency heating means 21, 21a, 21b Supply electrode 22, Passive electrode 23 Feed point 24 Electrode wiring 25 Power supply part 26 Electrode part 27, 57 Electrode arrangement adjusting means 30, 30a Rapid cooling means 31 First nozzle part 32 Second nozzle part 34 opening 40 conveyance support part (conveyance means) 41 Support (conveying ring) G glass plate

Landscapes

  • 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 qui sert à former/renforcer une feuille de verre, et qui peut effectuer un traitement de renforcement favorable même si la feuille de verre est une feuille mince. Le dispositif (1) pour former/renforcer une feuille de verre comporte : des moyens de formation (10), qui forment une feuille de verre (G); des moyens de chauffage (5) qui chauffent la feuille de verre formée; des moyens de trempe (30) qui trempent les deux surfaces de la feuille de verre; et des moyens de transport/support (40) qui transportent la feuille de verre et qui supportent la feuille de verre dans une position prédéterminée, et qui comportent un corps de support (41) qui supporte les bords de la feuille de verre formée. Les moyens de chauffage comportent au moins : une unité électrode (26) qui applique une haute fréquence à la feuille de verre, chauffant la feuille de verre; une unité de source d'alimentation qui applique une tension haute fréquence à l'unité électrode; et des moyens de réglage de disposition d'électrode qui peuvent régler la distance entre l'électrode et la plaque de verre supportée dans la position prédéterminée. Les moyens de trempe comportent : une unité buse qui comporte une pluralité de buses, aux pointes desquelles sont situées des ouvertures, et qui est disposée d'une manière telle que les ouvertures précédemment mentionnées font face aux deux surfaces dans la direction de l'épaisseur de la feuille de verre; et des moyens de décharge qui déchargent un milieu de refroidissement à partir des ouvertures. La section électrode, la section buse et l'unité de transport/support sont isolées.
PCT/JP2011/058130 2010-03-30 2011-03-30 Dispositif pour former/renforcer une feuille de verre et procédé pour produire une feuille de verre WO2011122680A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-079666 2010-03-30
JP2010079666A JP2013129541A (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

Publications (1)

Publication Number Publication Date
WO2011122680A1 true WO2011122680A1 (fr) 2011-10-06

Family

ID=44712373

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/058130 WO2011122680A1 (fr) 2010-03-30 2011-03-30 Dispositif pour former/renforcer une feuille de verre et procédé pour produire une feuille de verre

Country Status (2)

Country Link
JP (1) JP2013129541A (fr)
WO (1) WO2011122680A1 (fr)

Cited By (5)

* 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
CN109467309A (zh) * 2017-09-07 2019-03-15 南宁市富久信息技术有限公司 一种出风均匀的钢化玻璃炉风栅
CN110642509A (zh) * 2019-10-30 2020-01-03 四川安能玻璃有限公司 一种组合式全面散热钢化炉风机房
WO2021017820A1 (fr) * 2019-07-29 2021-02-04 洛阳兰迪玻璃机器股份有限公司 Appareil permettant de tremper un verre incurvé ayant un effet d'atténuation des profils de contraintes
RU2818359C2 (ru) * 2019-07-29 2024-05-02 Лоян Лендгласс Текнолоджи Ко., Лтд Оборудование для закалки гнутого стекла с возможностью ослабления закалочных пятен

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102342004B1 (ko) * 2017-07-21 2021-12-21 쌩-고벵 글래스 프랑스 유리판들의 열 프리스트레싱 (thermal prestressing)을 위한 블로어 박스 (blower box)
BR112020001804A2 (pt) * 2017-07-31 2020-07-21 Saint-Gobain Glass France método e dispositivo para dobrar painéis

Citations (3)

* Cited by examiner, † Cited by third party
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
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 (3)

* Cited by examiner, † Cited by third party
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
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 (7)

* 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
CN109467309A (zh) * 2017-09-07 2019-03-15 南宁市富久信息技术有限公司 一种出风均匀的钢化玻璃炉风栅
WO2021017820A1 (fr) * 2019-07-29 2021-02-04 洛阳兰迪玻璃机器股份有限公司 Appareil permettant de tremper un verre incurvé ayant un effet d'atténuation des profils de contraintes
KR20220043161A (ko) * 2019-07-29 2022-04-05 루오양 랜드글라스 테크놀로지 컴퍼니 리미티드 응력 패턴 약화 효과가 있는 곡면 유리 강화 장치
RU2818359C2 (ru) * 2019-07-29 2024-05-02 Лоян Лендгласс Текнолоджи Ко., Лтд Оборудование для закалки гнутого стекла с возможностью ослабления закалочных пятен
KR102664183B1 (ko) 2019-07-29 2024-05-17 루오양 랜드글라스 테크놀로지 컴퍼니 리미티드 응력 패턴 약화 효과가 있는 곡면 유리 강화 장치
CN110642509A (zh) * 2019-10-30 2020-01-03 四川安能玻璃有限公司 一种组合式全面散热钢化炉风机房

Also Published As

Publication number Publication date
JP2013129541A (ja) 2013-07-04

Similar Documents

Publication Publication Date Title
JP5821841B2 (ja) ガラス板の強化方法及びその装置
WO2011122680A1 (fr) Dispositif pour former/renforcer une feuille de verre et procédé pour produire une feuille de verre
EP2351713B1 (fr) Appareil intensificateur de refroidissement par air pour plaque de verre et procédé d intensification de refroidissement par air
KR101792376B1 (ko) 전기 가열기, 디프로스터, 가열 및 에어컨 시스템 및 차량
JP2009285728A (ja) 熱間プレス成形用鋼板の加熱装置及び加熱方法
EP2518169B1 (fr) Procédé de traçage laser rapide
TWI587750B (zh) 電漿點燃及維持方法與設備
JP2009250474A (ja) 高周波誘電加熱による円筒体の加熱乾燥装置
WO2011122679A1 (fr) Dispositif pour mouler et renforcer une plaque de verre, et procédé de fabrication pour plaque de verre
CN115513662B (zh) 一种曲面天线曲面电阻结构及其原位增材制造方法
CN104942880A (zh) 一种纸质载带用去毛刺系统及去毛刺方法
CN110453201A (zh) 一个腔体内对多个石墨舟同时镀膜的工艺方法及镀膜装置
WO2012118083A1 (fr) Procédé de découpe d'une plaque de verre et dispositif de découpe
JP2007213898A (ja) 鉛蓄電池用極板の乾燥装置および鉛蓄電池用極板の製造方法
WO2013129165A1 (fr) Procédé de fabrication d'un substrat de verre, et substrat de verre
EP2471758B1 (fr) Appareil et procédé de fabrication de verre trempé
CN103964679A (zh) 一种隧道式泡沫玻璃退火窑
CN102410714B (zh) 保温板微波烘干设备
CN101988145B (zh) 带凹槽结构的加热室
CN111484236B (zh) 裂片装置和切割设备
CN203156193U (zh) 锡炉热能补偿装置
CN203904204U (zh) 一种隧道式泡沫玻璃退火窑
CN215864629U (zh) 一种采用等离子烧制的陶瓷窑炉
CN219390418U (zh) 一种橡塑板干燥系统
CN201842864U (zh) 带凹槽结构的加热室

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11762904

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11762904

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP