WO2017208972A1 - Procédé de fabrication d'une plaque de verre renforcée par voie chimique et boîtier pour plaque de verre pour le renforcement chimique - Google Patents

Procédé de fabrication d'une plaque de verre renforcée par voie chimique et boîtier pour plaque de verre pour le renforcement chimique Download PDF

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Publication number
WO2017208972A1
WO2017208972A1 PCT/JP2017/019599 JP2017019599W WO2017208972A1 WO 2017208972 A1 WO2017208972 A1 WO 2017208972A1 JP 2017019599 W JP2017019599 W JP 2017019599W WO 2017208972 A1 WO2017208972 A1 WO 2017208972A1
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WIPO (PCT)
Prior art keywords
glass plate
jig
glass
side edge
chemical strengthening
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PCT/JP2017/019599
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English (en)
Japanese (ja)
Inventor
尚史 青山
明典 横田
出 鹿島
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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
Priority to JP2018520858A priority Critical patent/JP6954277B2/ja
Publication of WO2017208972A1 publication Critical patent/WO2017208972A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • C03B35/20—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by gripping tongs or supporting frames
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/673—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere using specially adapted carriers or holders; Fixing the workpieces on such carriers or holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping

Definitions

  • the present invention relates to a method for producing a chemically strengthened glass sheet and a chemically strengthened glass sheet container used therefor.
  • a chemically strengthened glass plate is attached as a cover glass on the front surface of the display device, and functions to protect a liquid crystal display (LCD).
  • the chemically strengthened glass plate is manufactured by immersing a glass plate containing Na ions in a molten salt containing K ions. In actual production, it has been conventionally performed to immerse a glass plate in a molten salt using a support device capable of placing a plurality of glass plates at intervals.
  • Patent Document 1 is presented as a document that describes a supporting device that can be used for manufacturing a chemically strengthened glass plate.
  • Patent Document 1 discloses a supporting device used when heat-treating a glass plate. This support device has a structure in which the lower end edge of the glass plate is inserted into the groove of the separation comb and supported, and the upper end edge of the glass plate is supported by the separation comb or the separation rod.
  • the salt bath treatment in the chemical strengthening treatment is performed by immersing a glass plate in a molten salt having a temperature not higher than the glass transition point (for example, 400 ° C. to 530 ° C.) for ion exchange, thereby compressing the surface of the glass plate.
  • a molten salt having a temperature not higher than the glass transition point (for example, 400 ° C. to 530 ° C.) for ion exchange, thereby compressing the surface of the glass plate.
  • the present invention has been made in view of the above-described circumstances, and its purpose is to improve the productivity of chemically strengthened glass plates by chemically strengthening the glass plates with high quality and high yield. It is in providing the manufacturing method of a tempered glass plate, and the glass plate container for chemical strengthening.
  • the method for producing a chemically strengthened glass sheet of the present invention comprises: Grip the first side edge of the glass plate, Suspend the glass plate with the gripped first side edge upward, The glass plate is chemically strengthened by immersing it in a molten salt while suspending the glass plate and performing a salt bath treatment.
  • the glass plate container for chemical strengthening of the present invention is A chemically strengthened glass plate container that is used in the above-described method for producing a chemically strengthened glass plate and is put into the molten salt while storing a plurality of the glass plates, A frame that accommodates the plurality of glass plates; A first jig provided on an upper part of the frame body, holding the first side edge of each glass plate and suspending the glass plate with a gap between them; It is characterized by providing.
  • the load due to its own weight can be obtained by putting the first jig into the molten salt while holding the first side edge of the glass plate in a suspended state. It is possible to perform salt bath treatment on a plurality of glass plates while suppressing the application of. Thereby, a plurality of large and thin glass plates can be chemically strengthened while suppressing deformation due to low temperature creep.
  • the side edge is an area where the glass plate is gripped.
  • the side edge is preferably within 30 mm from the outer peripheral edge of the glass plate, more preferably within 20 mm from the outer peripheral edge, further preferably within 15 mm from the outer peripheral edge, and the outer peripheral edge. Within 10 mm is particularly preferable.
  • a tool may be provided.
  • the second side edge which is the other side edge of the lower side of the glass plate suspended by the upper first jig is used as the lower second jig.
  • the second jig for gripping the second side edge, which is the other side edge of the lower side of the suspended glass plate only needs to be able to prevent contact due to the shaking of the glass plates, and suppresses the shaking of the glass plate. It only needs to be able to grip as much as possible. That is, the gripping force of the second jig may be smaller than the gripping force of the first jig.
  • a plurality of the first jigs may be provided along the first side edge of the glass plate at intervals.
  • the glass plate container for chemical strengthening of this configuration by gripping the first side edge of the glass plate with a plurality of first jigs, compared to gripping with a single first jig, The external force applied to the first jig can be distributed to a plurality of first jigs, and the influence of the external force applied by holding the first jig on the glass plate can be suppressed as much as possible. it can.
  • the first jig may be supported by the frame through a flexible support member.
  • the first jig is supported by the support member having flexibility with respect to the frame body. This jig is displaced flexibly. Thereby, the external force given to a glass plate at the holding location with a 1st jig
  • the first jig is provided on each of a pair of sandwiching plates that sandwich and sandwich the glass plate, and a surface of the sandwiching plate that faces the glass plate. And a cushioning material.
  • the holding plate that holds the glass plate of the first jig includes the buffer material, so that the glass plate is damaged when holding the glass plate. Is difficult to follow.
  • the thermal expansion coefficient of the glass plate and the buffer material is substantially equal, so that damage due to temperature fluctuations during the chemical strengthening process can be suppressed as much as possible.
  • silica cloth, ceramic cloth, quartz glass, glass board, and blanket can be used as a buffer material other than the glass cloth.
  • a plurality of the second jigs may be provided along the second side edge of the glass plate at intervals.
  • the glass plate container for chemical strengthening of this configuration by gripping the second side edge of the glass plate with a plurality of second jigs, compared to gripping with a single second jig, The external force applied to the second jig can be dispersed to a plurality of second jigs, and the influence of the external force applied by holding the second jig on the glass plate can be suppressed as much as possible. it can.
  • the second jig may be supported by the frame body via a flexible support member.
  • the second jig is supported by the support member having flexibility with respect to the frame body, the second plate is made to follow the shaking of the glass plate.
  • This jig is displaced flexibly. Thereby, the external force provided to a glass plate at the holding location with a 2nd jig
  • the second jig is provided on each of a pair of holding plates that hold the glass plate and the opposing surfaces of the holding plate facing the glass plate. And a cushioning material.
  • the holding plate that holds the glass plate of the second jig sandwiches the glass plate, so that the glass plate is damaged when holding the glass plate. Is difficult to follow.
  • a glass cloth having the same quality as the glass plate is used as the buffer material, the thermal expansion coefficient of the glass plate and the buffer material is substantially equal, so that damage due to temperature fluctuations during the chemical strengthening process can be suppressed as much as possible.
  • silica cloth, ceramic cloth, quartz glass, glass board, and blanket can be used as a buffer material other than the glass cloth.
  • the manufacturing method of the chemically strengthened glass plate and the glass plate container for chemical strengthening which can improve the productivity of a chemically strengthened glass plate significantly by chemically strengthening a glass plate with high quality and a high yield Can provide.
  • FIG. 1 is a schematic perspective view of a chemically strengthened glass sheet container according to this embodiment used in the method for producing a chemically strengthened glass sheet of the present invention.
  • a chemically strengthening glass plate container (hereinafter referred to as a glass plate container) 1 of the present embodiment includes a rectangular parallelepiped box-shaped frame body 11. A plurality of glass plates G are accommodated inside.
  • the frame 11 includes a rectangular upper frame 12 and a rectangular lower frame 14, and the upper frame 12 and the lower frame 14 have four side frames arranged at the four corners. They are connected by a material 16 and arranged up and down.
  • a plurality of glass plates G have the longitudinal direction in the left-right direction (arrow A in the figure) and the short direction in the vertical direction (arrow B in the figure). Thus, they are housed side by side in the front-rear direction (arrow C in the figure).
  • the shape of the glass plate G stored side by side in the glass plate container 1 is not particularly limited. It may be a rectangular glass plate G, the corner of the glass plate G may be round, or a polygonal shape such as a triangular shape, an elliptical shape, or a circular shape.
  • the upper frame 12 is composed of two frame members 12a constituting the long side and two frame members 12b constituting the short side.
  • the lower frame 14 is composed of two pieces constituting the long side.
  • the frame members 12a and 12b of the upper frame 12, the frame members 14a and 14b of the lower frame 14, and the side frame member 16 are formed of, for example, a U-shaped channel or a hollow square pipe made of SUS304.
  • an expanded metal 14c made of SUS304 is attached to the entire inner surface surrounded by the frame members 14a and 14b of the lower frame 14, and even if a plurality of glass plates G are accommodated inside the glass plate accommodating body 1. In addition, it can sufficiently withstand conveyance and immersion in molten salt.
  • the frame body 11 is provided with a hanging tool 18 at the center portion in the front-rear direction on the two frame members 12b extending in the front-rear direction of the upper frame 12.
  • a hanging tool 18 at the center portion in the front-rear direction on the two frame members 12b extending in the front-rear direction of the upper frame 12.
  • hooks such as cranes are engaged with these hanging tools 18.
  • the hanging tool 18 may be provided in the location where the two frame materials 12a extended in the left-right direction and the two frame materials 12b extended in the front-back direction are connected.
  • the upper frame 12 is provided with a plurality of top bars 21 that extend in the front-rear direction, which is the direction in which the glass plates G are arranged (three are shown in the figure, but are not limited to three).
  • the lower frame 14 is provided with a plurality of bottom bars 22 (two are shown in the figure, but are not limited to two) extending in the front-rear direction, which is the direction in which the glass plates G are arranged.
  • the top bars 21 are arranged at equal intervals in the left-right direction which is the longitudinal direction of the frame body 11, two are arranged in the vicinity of both ends, and one is arranged in the center.
  • the bottom bars 22 are respectively disposed between the top bars 20 in the left-right direction.
  • the top bar 21 and the bottom bar 22 are alternately arranged along the left-right direction.
  • the top bar 21 and the bottom bar 22 are arranged so as to extend in the short direction of the frame body 11, but the top bar 21 and the bottom bar 22 are not limited thereto, and the frame body 11 is not limited thereto. It may be arranged so as to extend in the longitudinal direction. In this case, a plurality of glasses G are accommodated in the direction of arrow A. Further, the interval between the top bar 21 and the bottom bar 22 is not necessarily equal.
  • FIG. 2 is a view taken along the arrow D in FIG. 1 of the glass plate container for explaining the glass plate container in which the glass plate is housed.
  • a plurality of upper jigs (first jigs) 31 are provided on the upper portion of the frame body 11. These upper jigs 31 hold the first side edge G1 which is one side edge of the glass plate G.
  • the upper jigs 31 are supported by the respective top bars 21, whereby a plurality of upper jigs 31 (three in this example) are arranged along the first side edge G 1 of the glass plate G with a space between each other. One) is provided.
  • Each top bar 21 has a plurality of upper jigs 31 arranged at intervals in the longitudinal direction. Thereby, the plurality of glass plates G are suspended by the upper jig 31 with a gap in the front-rear direction, which is the alignment direction.
  • a plurality of lower jigs (second jigs) 32 are provided at the lower part of the frame body 11. These lower jigs 32 hold the second side edge G2, which is the other side edge facing the first side edge G1 of the glass plate G.
  • the lower jigs 32 are supported by the respective bottom bars 22, whereby a plurality (two in this example, two lower jigs 32 are provided along the second side edge G ⁇ b> 2 of the glass plate G at intervals. ) Is provided. Then, the glass plate G is held between the holding positions of the upper jig 31 in the left-right direction by the lower jig 32.
  • Each bottom bar 22 has a plurality of lower jigs 32 arranged at intervals in the longitudinal direction. As a result, the plurality of glass plates G are held by the lower jig 32 with a gap in the front-rear direction, which is the alignment direction.
  • the structure of the upper jig 31 and the lower jig 32 will be described. Since the upper jig 31 and the lower jig 32 have the same structure, the configuration of the upper jig 31 will be described here, and the description of the configuration of the lower jig 32 will be omitted.
  • FIG. 3 is a front view showing an embodiment of the upper jig provided in the glass plate container.
  • FIG. 4 is a side view showing an embodiment of the upper jig provided in the glass plate container.
  • the upper jig 31 includes a jig body 41, a clamping plate 42, and a fastening bolt 43.
  • the jig body 41 is formed in a U shape having a pair of side plate portions 45 facing each other and a fixed plate portion 46 connecting one side edges of these side plate portions 45.
  • Each side plate portion 45 is formed with at least one screw hole 45a, and at least one fastening bolt 43 is screwed into the screw hole 45a from the outside of the side plate portion 45.
  • the sandwiching plate 42 is disposed between the side plate portions 45 of the jig body 41 so that the sandwiching plates 42 face each other.
  • the pair of sandwiching plates 42 is provided with a buffer material 61 on opposing surfaces 51 a of the sandwiching plate 42 facing each other.
  • the buffer material 61 is made of a material having flexibility and elasticity as well as heat resistance.
  • a glass cloth made of glass fiber in particular, a woven fabric made of glass fiber having the same quality as the glass plate G, is used. preferable.
  • FIG. 5 is a front view showing another embodiment of the upper jig provided in the glass plate container.
  • FIG. 6 is a side view showing another embodiment of the upper jig provided in the glass plate container.
  • the upper jig 31 has a jig body 41, a clamping plate 42, and a fastening bolt 43.
  • the jig body 41 is formed in a U shape having a pair of side plate portions 45 facing each other and a fixed plate portion 46 connecting one side edges of these side plate portions 45.
  • At least one (two in FIGS. 5 and 6) screw holes 45a are formed on one side of the pair of side plate portions 45 facing each other, and these screw holes 45a are formed from the outside of the side plate portions 45.
  • At least one fastening bolt 43 is screwed.
  • the sandwiching plate 42 is disposed between the side plate portions 45 in the jig main body 41.
  • the glass plate G is surrounded by a surface 51 a opposite to the surface of the clamping plate 42 that contacts the fastening bolt 43, a surface 51 b of the side plate portion 45 facing the clamping plate 42, and a lower surface of the fixing plate portion 46.
  • a buffer material 61 is provided.
  • the buffer material 61 is made of a material having flexibility and elasticity as well as heat resistance. For example, a glass cloth made of glass fiber, in particular, a woven fabric made of glass fiber having the same quality as the glass plate G, is used. preferable.
  • the cushioning material 61 may be fixed to the sandwiching plate 42, or may be provided separately from the sandwiching plate 42.
  • the jig body 41 is provided with a locking portion 46a at the center of the fixed plate portion 46 when viewed from the front, and a support member 65 is locked to the locking portion 46a.
  • the support member 65 is a wire made of a material having flexibility and heat resistance, and the support member 65 made of this wire is fastened to the locking portion 46a.
  • the support member 65 is wound and fixed around the top bar 21 fixed to the upper frame 12 of the frame 11. As a result, the upper jig 31 is supported by the top bar 21 fixed to the upper frame 12 of the frame 11 via the flexible support member 65.
  • the support member 65 locked to the locking portion 46 a is wound and fixed on the bottom bar 22 fixed to the lower frame 14 of the frame body 11. Accordingly, the lower jig 32 is supported by the bottom bar 22 fixed to the lower frame 14 of the frame body 11 via the flexible support member 65.
  • the width dimension of the upper jig 31 and the lower jig 32 is preferably about 20 mm to 60 mm.
  • the fixing method of the jig body 41 is not limited to this, and instead of the support member 65 made of a wire, the center portion of the fixing plate portion 46 or the end portion of the support member 65 locked to the locking portion 46a.
  • the top bar 21 may be hooked so as to be provided with a hook.
  • the method for producing the chemically strengthened glass plate according to the present embodiment is not particularly limited, but a large and thin glass plate (for example, size: 2421 mm to 1200 mm ⁇ 1500 mm to 1000 mm, thickness: 0.3 mm) Useful for chemically strengthening ( ⁇ 0.4 mm).
  • tool 31 is mounted
  • the first side edge G1 of the glass plate G is disposed between the sandwiching plate portions 51 of the respective sandwiching plates 42, and the fastening bolts 43 are screwed in.
  • the glass plate G is sandwiched and held by the sandwiching plate portion 51 from both sides.
  • the upper jig 31 is attached to both the vicinity and the center of the first side edge G1 of the glass plate G.
  • the lower jig 32 is mounted on the second side edge G2 which is the other side edge facing the first side edge G1 of the glass plate G.
  • the second side edge G2 of the glass plate G is disposed between the clamping plate portions 51 of the respective clamping plates 42, and the fastening bolts 43 are screwed in.
  • the glass plate G is sandwiched and held by the sandwiching plate portion 51 from both sides.
  • the lower jig 32 is mounted between the upper jigs 31 on the second side edge G2 of the glass plate G.
  • the upper jig 31 may be attached to the glass plate G after the lower jig 32 is attached to the glass plate G.
  • the glass plate G is vertically arranged so that the first side edge G1 to which the upper jig 31 is attached is upward and the second side edge G2 to which the lower jig 32 is attached is downward. And housed inside the frame 11.
  • the support member 65 is inserted into the locking portion 46 a, wound around the top bar 21, and then fastened to support the upper jig 31 on the top bar 21 of the upper frame 12 by the support member 65. .
  • the glass plate G is suspended in the state which turned up the 1st side edge G1 which is the one side edge.
  • the upper jig 31 holds the glass plate G from both sides by the clamping plate portion 51 by screwing the fastening bolt 43. Therefore, if the screwing amount of each fastening bolt 43 is adjusted so that the gripping position of the glass plate G is the center position in the front-rear direction (left-right direction in FIG.
  • the gripping position of the glass plate G is the support member. It is substantially coincided with the hanging position by 65 in the vertical direction. If it does in this way, the effect
  • the lower jig 32 is supported on the bottom bar 22 of the lower frame 14 by the support member 65.
  • the second side edge G ⁇ b> 2 that is the other side edge of the glass plate G suspended inside the frame body 11 is held by the frame body 11.
  • the lower jig 32 may be attached to the second side edge G2 of the glass plate G, and the lower jig 32 may be supported by the bottom bar 22.
  • each glass plate G is suspended in the frame 11 and is accommodated in the frame 11 with a gap between them.
  • the glass plate G accommodated in the glass plate container 1 is subjected to various treatments for chemical strengthening.
  • the glass plate container 1 is put into a preheating furnace and subjected to heat treatment (heat treatment).
  • heat treatment heat treatment
  • the glass plate G is heated over time to gradually increase the temperature.
  • the hook is locked to the hanger 18 of the glass plate container 1 and lifted by a crane, the glass plate container 1 is put into the molten salt storage tank in which the molten salt is stored, and the glass plate G is replaced with the glass plate. It is immersed in the molten salt in a suspended state in the container 1 (salt bath treatment).
  • alkali metal ions typically Li ions, Na ions
  • alkali ions typically Li ions, Na ions
  • a compressive stress layer is formed on the glass surface and a tensile stress layer is formed inside the glass by exchanging with K ions.
  • the glass plate container 1 is pulled up from the molten salt storage tank and put into a slow cooling furnace to slowly cool the glass plate G (slow cooling treatment).
  • slow cooling treatment for example, the amount of heat whose output is controlled by an electric heater is supplied to a necessary position in the slow cooling furnace, and the glass sheet G conveyed in the slow cooling furnace is slowly cooled to a temperature range close to room temperature.
  • the glass plate container 1 is put in a washing tank, the glass plate G is washed, and finally, the cleaning solution attached to the surface of the glass plate G is washed away by a shower (cleaning process).
  • the glass plate G is a chemically strengthened chemically strengthened glass plate.
  • the glass plate G is immersed in the molten salt while being suspended, and the salt bath treatment is performed. Therefore, the weight of the glass plate G during the salt bath treatment is reduced. The application of the load due to can be suppressed. Therefore, for example, compared with the case where the glass plate G is leaned and subjected to the salt bath treatment, deformation due to low-temperature creep caused by concentration of a load such as its own weight on the lower end of the glass plate G during the salt bath treatment is suppressed. be able to. Thereby, the large and thin glass plate G can be chemically strengthened with high quality and high yield, and the productivity of the chemically strengthened glass plate can be greatly improved.
  • the 1st side edge G1 which is one side edge of the glass plate G is provided to the upper jig
  • the salt bath treatment can be performed on the plurality of glass plates G while suppressing the application of a load due to its own weight as much as possible. Thereby, a plurality of large and thin glass plates G can be chemically strengthened while suppressing deformation due to low temperature creep.
  • the glass plate suspended in the chemical strengthening step is held by the lower jig 32 by holding the second side edge G2 which is the other side edge of the lower side of the glass plate G suspended by the upper jig 31.
  • the upper side 31 of the glass plate G is gripped by the plurality of upper jigs 31 and the second side edge G2 of the lower side of the glass plate G is gripped by the plurality of lower jigs 32.
  • the external force applied when the upper jig 31 and the lower jig 32 are gripped can be dispersed.
  • tool 32 can be suppressed as much as possible.
  • the upper jig 31 and the lower jig 32 are supported by the support member 65 having flexibility with respect to the frame body 11, the upper jig 31 and the lower jig 32 are caused to follow the shaking of the glass plate G and the like.
  • the tool 32 is displaced flexibly. Thereby, the external force resulting from the shake
  • the holding plate 42 that holds the glass plate G of the upper jig 31 and the lower jig 32 includes the buffer material 61, the glass plate G is hardly damaged when the glass plate G is held.
  • the thermal expansion coefficient of the glass plate and the buffer material is substantially the same, so damage due to temperature fluctuations during the chemical strengthening process ( The occurrence of cracks in the glass plate G and the occurrence of scratches on the surface of the glass plate G) can be minimized.
  • the first side edge G1 of the glass plate G is held and suspended by the plurality of upper jigs 31, but the first upper jig 31 of the glass plate G is suspended by one long upper jig 31.
  • the side edge G1 may be held and suspended over substantially the entire length.
  • the second side edge G ⁇ b> 2 of the glass plate G may be gripped over substantially the entire length with one long lower jig 32.
  • the glass plates G sway during salt bath processing. If there is no contact, the lower jig 32 is not necessarily provided.
  • a partition wall interposed between the glass plates G may stand up from the bottom bar 22 so that the glass plates G are not shaken and contacted.
  • a glass plate having a G6 size (1800 mm ⁇ 1500 mm) and a thickness of 0.3 mm was supported by various support methods and chemically strengthened, and the finished product after chemical strengthening was evaluated.
  • the glass plate is manufactured by a float process in which molten glass is flowed over molten tin to form a smooth glass plate, the molten tin side during float forming is the lower surface side, and the opposite side from the molten tin during float forming Is the upper surface side.
  • Example 1 Place the glass plate with the first side edge (one side edge) upward and the second side edge (other side edge) downward, over three bottom bars arranged at equal intervals. The upper first side edge and both end edges were held so as not to fall down.
  • Example 1 The upper jig with a width dimension of 60 mm is used to grip and hang the vicinity of both ends and the center of the first side edge of the glass plate, and the upper jig with the lower side jig with a width dimension of 60 mm. Between the grip positions.
  • Example 2 The upper jig with a width dimension of 40 mm is used to grip and suspend the vicinity of both ends and the center of the first side edge of the glass plate, and the upper jig with the lower side jig of the width dimension of 40 mm. Between the grip positions.
  • Chemical strengthening treatment was performed by immersing in a molten salt at 400 ° C. containing potassium nitrate (KNO 3 ) as a main component for 4 hours.
  • Table 1 shows the results of each evaluation.
  • Example 1 Although slight warping occurred in the grip portion of the upper jig, it was confirmed that there was almost no distortion in the entire surface and the surface quality was very good. As a result, the evaluation of distortion was a pass ( ⁇ ). (4.1.3) Example 2 As in Example 1, a slight warp occurred in the grip portion of the upper jig, but there was almost no distortion in the entire surface, and it was confirmed that the surface quality was very good.
  • Example 2 The maximum value of the warp of the small piece was suppressed to 0.20 mm, and the ratio of the region where the warp was 0.3 mm or less was 100%. As a result, the evaluation of small piece warpage was a pass ( ⁇ ).
  • the production method according to the present invention in which the salt bath treatment is performed in a state where the glass plate is suspended is effective. According to this, it was found that the productivity of the chemically strengthened glass plate can be greatly improved.
  • the width dimension of the upper jig and the lower jig is preferably about 20 mm to 60 mm.
  • Glass plate container 11 for chemical strengthening Frame 31: Upper jig (first jig) 32: Lower jig (second jig) 42: sandwiching plate 61: buffer material 65: support member G: glass plate G1: first side edge G2: second side edge

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  • Materials Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

La présente invention concerne une plaque de verre (G) renforcée par voie chimique. Un premier bord latéral (G1) de la plaque de verre (G) est saisi, la plaque de verre (G) est suspendue avec le premier bord latéral (G1) saisi maintenu vers le haut, et la plaque de verre (G) est trempée dans un bain de sel fondu tout en restant suspendue pour le traitement avec le bain de sel. Le procédé selon l'invention permet aux plaques de verre d'être renforcées par voie chimique avec un rendement élevé et une grande qualité, et d'améliorer significativement la productivité desdites plaques de verre renforcées par voie chimique.
PCT/JP2017/019599 2016-05-30 2017-05-25 Procédé de fabrication d'une plaque de verre renforcée par voie chimique et boîtier pour plaque de verre pour le renforcement chimique WO2017208972A1 (fr)

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JP2000219479A (ja) * 1999-02-01 2000-08-08 Central Glass Co Ltd ガラス板用吊り金具
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