WO2019093341A1 - Curved substrate production method and mold for curved substrate - Google Patents

Curved substrate production method and mold for curved substrate Download PDF

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Publication number
WO2019093341A1
WO2019093341A1 PCT/JP2018/041247 JP2018041247W WO2019093341A1 WO 2019093341 A1 WO2019093341 A1 WO 2019093341A1 JP 2018041247 W JP2018041247 W JP 2018041247W WO 2019093341 A1 WO2019093341 A1 WO 2019093341A1
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WIPO (PCT)
Prior art keywords
base material
preform
molding surface
substrate
molding
Prior art date
Application number
PCT/JP2018/041247
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French (fr)
Japanese (ja)
Inventor
弘輝 石橋
諭 金杉
Original Assignee
Ａｇｃ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 Ａｇｃ株式会社 filed Critical Ａｇｃ株式会社
Priority to CN201880072676.8A priority Critical patent/CN111328322B/en
Priority to JP2019552819A priority patent/JP7196855B2/en
Publication of WO2019093341A1 publication Critical patent/WO2019093341A1/en

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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
    • C03B23/025—Re-forming glass sheets by bending by gravity
    • 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
    • C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending

Definitions

  • the present invention relates to a method of manufacturing a flexible substrate and a mold for the flexible substrate.
  • An object of the present invention is to provide a method of manufacturing a flexible substrate that can be accurately positioned on a forming surface and easily form a high-quality flexible substrate, and a mold for the flexible substrate.
  • the present invention has the following constitution.
  • the preform substrate is placed on a forming die provided with a guide member having a guide portion which inclines from the outside of the forming surface toward the edge of the forming surface,
  • the peripheral edge portion of the preform base material is brought into contact with the guide portion and slipped to guide the peripheral edge portion of the preform base material toward the edge portion of the molding surface.
  • Method of producing a flexible substrate (2) A mold for forming a preform base material into a bent base material at least a part of which is curved along a molding surface of the mold, The molding surface having the same outer shape as the outer shape of the bent substrate; A guide member having a guide portion which inclines from the outside of the molding surface toward the edge of the molding surface; Equipped with The guide member guides the peripheral edge of the preform base toward the edge of the molding surface by bringing the peripheral edge of the preform base into contact with the guide and sliding it. Mold of flexible base material.
  • FIG. 1 is a perspective view of a bending base material 10 according to the present embodiment.
  • FIG. 2 is a plan view of the bending base material 10 according to the present embodiment.
  • FIG. 3 is a cross-sectional view of the edge portion of the bending base material 10 according to the present embodiment.
  • the bending base material 10 has one main surface 11 (lower surface in the drawing) and the other main surface 12 (upper surface which is the opposite surface of the main surface 11 in the drawing) Is a glass plate having
  • the bending substrate 10 is a substrate having a three-dimensional shape which is concavely curved downward along the X direction and the Y direction.
  • This bending base material 10 is used, for example, as a base material of a mirror of a head-up display or a cover glass of an on-vehicle product.
  • the corner 13 at the edge is chamfered in a convex curved shape.
  • the dimension a in the X direction, the dimension b in the Y direction, and the plate thickness t of the bending base material 10 are not particularly limited.
  • the plate thickness t is preferably substantially constant over the entire area of the flexible base 10. Further, the thickness t may be partially changed or may be changed over the entire area of the bending base material 10.
  • glass plates such as crystallized glass and color glass other than colorless and transparent amorphous glass, are mentioned.
  • the glass for example, alkali-free glass, soda lime glass, soda lime silicate glass, aluminosilicate glass, borosilicate glass, lithium aluminosilicate glass, borosilicate glass can be used. It is preferable to use an aluminosilicate glass from which a high stress can be easily obtained by a strengthening treatment even if the thickness is thin, even if the thickness is thin.
  • the glass composition 50 to 80% of SiO 2 , 0.1 to 25% of Al 2 O 3, and 3 to 10% of Li 2 O + Na 2 O + K 2 O are shown in the composition expressed in mol% based on oxide.
  • a glass containing 30%, 0-25% of MgO, 0-25% of CaO and 0-5% of ZrO 2 may be mentioned, but it is not particularly limited. More specifically, the following composition of glass is mentioned.
  • “containing 0 to 25% of MgO” means that MgO is not essential but may contain up to 25%.
  • the glass of (i) is contained in soda lime silicate glass, and the glass of (ii) and (iii) is contained in aluminosilicate glass.
  • the glass of (v) is contained in lithium aluminosilicate glass.
  • (I) 63 to 73% of SiO 2 , 0.1 to 5.2% of Al 2 O 3 , 10 to 16% of Na 2 O, and K 2 O in the composition expressed in mol% based on the oxide Glass containing 0 to 1.5%, 0 to 5% of Li 2 O, 5 to 13% of MgO and 4 to 10% of CaO.
  • Composition viewed in mole percent (ii) an oxide basis is, the SiO 2 50 ⁇ 74%, the Al 2 O 3 1 ⁇ 10% , a Na 2 O 6 ⁇ 14%, the K 2 O 3 ⁇ 11% , Containing 0 to 5% of Li 2 O, 2 to 15% of MgO, 0 to 6% of CaO and 0 to 5% of ZrO 2 , and the total content of SiO 2 and Al 2 O 3 is 75% or less Glass having a total content of Na 2 O and K 2 O of 12 to 25% and a total content of MgO and CaO of 7 to 15%.
  • the composition expressed in mol% based on oxide is 67 to 75% of SiO 2 , 0 to 4% of Al 2 O 3 , 7 to 15% of Na 2 O, and 1 to 9% of K 2 O , 0 to 5% of Li 2 O, 6 to 14% of MgO and 0 to 1.5% of ZrO 2 , the total content of SiO 2 and Al 2 O 3 is 71 to 75%, Na 2 O And a glass wherein the total content of K 2 O is 12 to 20%, and the content of CaO is less than 1%.
  • (V) the composition viewed in mole percent on the oxide basis, of SiO 2 56 - 73%, the Al 2 O 3 10 ⁇ 24% , the B 2 O 3 0 ⁇ 6% , P 2 O 5 0 to 6%, 2 to 7% of Li 2 O, 3 to 11% of Na 2 O, 0 to 2% of K 2 O, 0 to 8% of MgO, 0 to 2% of CaO, 0 to 5% of SrO Glass containing 0 to 5% of BaO, 0 to 5% of ZnO, 0 to 2 % of TiO 2 , and 0 to 4% of ZrO 2 .
  • the total content of Li 2 O and Na 2 O in the glass composition is preferably at least 12 mol%. Furthermore, since the content of Li 2 O in the glass composition becomes easy to the molded lower the glass transition temperature increases, the content of Li 2 O is preferably at least 0.5 mol%, more preferably at least 1 mol%, 2 mol% or more is more preferable. Furthermore, in order to increase the surface compressive stress (compressive stress; hereinafter, CS) and the surface compression stress layer (depth, layer: hereinafter, DOL), the glass composition contains 60 mol% or more of SiO 2 , Al It is preferable to contain 8 mol% or more of 2 O 3 .
  • CS surface compressive stress
  • DOL surface compression stress layer
  • a coloring agent in the range which does not inhibit achievement of a desired chemical-strengthening characteristic.
  • Co 3 O 4 , MnO, MnO which are metal oxides of Co, Mn, Fe, Ni, Cu, Cr, V, Bi, Se, Ti, Ce, Er, and Nd, which have absorption in the visible region.
  • the coloring component (Co, Mn, Fe, Ni, Cu, Cr, V, Bi, Se, Ti, Ce, Er, and Nd) is expressed in terms of mole percentage on an oxide basis in the glass. And at least one component selected from the group consisting of metal oxides of at least 7%. When the coloring component exceeds 7%, the glass tends to be devitrified.
  • the content is preferably 5% or less, more preferably 3% or less, and still more preferably 1% or less.
  • the glass plate may appropriately contain SO 3 , chloride, fluoride and the like as a fining agent at the time of melting.
  • preform base material 10P which is flat glass which can be used as a raw material of bending base material 10 is explained.
  • the raw materials of the respective components are prepared to have the above-described composition, and are heated and melted in a glass melting furnace.
  • the glass is homogenized by bubbling, stirring, addition of a clarifying agent, etc., and a glass plate of a predetermined thickness is produced by a known forming method and gradually cooled.
  • Examples of the method of producing the glass include a float method, a press method, a fusion method, a downdraw method and a roll out method.
  • the float method suitable for mass production is preferable.
  • continuous production methods other than the float method that is, the fusion method and the downdraw method are also suitable.
  • the glass plate produced in a flat plate shape by an arbitrary production method is cut into a desired size to obtain a flat glass.
  • the glass plate after cutting may be subjected to polishing / grinding, end face processing, or drilling. As a result, cracking and chipping can be reduced in handling in the heating step or the like, and the yield can be improved.
  • the bending base 10 may have a treatment layer.
  • the treatment layer is not particularly limited.
  • the treatment layer include an antiglare layer which scatters reflected light and provides an effect of reducing glare of reflected light due to reflection of a light source.
  • the treatment layer may be formed by processing the main surfaces 11 and 12 of the bending base 10 itself, or may be separately formed by a deposition treatment method.
  • a method of forming the treatment layer for example, at least a part of the flexible substrate 10 may be subjected to surface treatment by chemical treatment or physical treatment.
  • the antiglare layer a method of forming a concavo-convex shape having a desired surface roughness can be used.
  • the concavo-convex shape may be formed on at least a part of the bending base material 10 by a deposition treatment method of applying or spraying a treatment liquid, or a thermal treatment method such as molding.
  • a deposition treatment method of applying or spraying a treatment liquid or a thermal treatment method such as molding.
  • an antireflection layer (AR layer) or an anti-fingerprint wiping layer (AFP layer) may be formed as the processing layer.
  • the bending base material 10 is glass
  • molding 0.5 mm or more and 5 mm or less are preferable. If it is glass provided with the thickness more than this lower limit, bending base material 10 is obtained with high strength and good texture.
  • thickness t of glass 0.7 mm or more and 3 mm or less are more preferable, and 1 mm or more and 3 mm or less are still more preferable.
  • FIG. 4 is a perspective view of the bending base 10 and the preform base 10P.
  • FIG. 5 is a plan view of the bending base 10 and the preform base 10P.
  • the bending base material 10 is obtained by curving a flat preform base material 10P.
  • the preform base 10P is a flat glass plate obtained by inverse calculation from the shape of the bending base 10 which is a molded product. Specifically, the preform base material 10P is obtained by flattening the bending base material 10 with equal distribution load by simulation, and as shown in FIG. Is a flat glass plate having a large outer diameter.
  • FIG. 6 is a perspective view of a forming apparatus 20 for forming the preform base 10P on the flexible base 10.
  • FIG. 7 is a plan view of a forming apparatus 20 for forming the preform base 10P on the flexible base 10.
  • FIG. 8 is a perspective view of the molding device 20 and the guide member 50. As shown in FIG.
  • the molding device 20 includes a molding die 30 and a guide member 50.
  • the forming apparatus 20 is an apparatus for forming a flat preform substrate 10P, which is a material of the flexible substrate 10, into a curved substrate 10 by curving.
  • the mold 30 has a molding surface 31 on the upper surface thereof, and a guide member 50 is provided around the molding surface 31.
  • the molding surface 31 is formed in a three-dimensional shape which is concavely curved downward along the Y direction and the X direction.
  • the molding surface 31 is a molding surface for molding the preform substrate 10P into the shape of the bending substrate 10 by bringing one main surface 11 of the preform substrate 10P, which is a material of the bending substrate 10, into close contact.
  • the guide member 50 is a member for guiding and positioning the preform base 10P to the molding surface 31.
  • the preform base 10P is placed on the molding die 30 having the molding surface 31 from above the molding surface 31.
  • the preform base 10P placed on the forming die 30 is guided by the guide member 50 and positioned on the forming surface 31.
  • the plurality of guide members 50 have both sides in the longitudinal direction (Y direction) of the preform base 10P, and the preform base 10P. Are respectively disposed on both sides in the short direction (X direction) of.
  • the molding surface 31 has a plurality of suction holes 32 formed therein.
  • a suction hose (not shown) from a vacuum pump (not shown) is connected to these suction holes 32 and can be suctioned by the vacuum pump.
  • the molding die 30 has a plurality of fitting recesses 33 formed around the molding surface 31 on the upper surface thereof, and the guide members 50 are fitted and mounted in the fitting recesses 33. Thus, a plurality of guide members 50 are erected on the periphery of the molding surface 31 in the molding die 30 at intervals.
  • the material of the mold 30 is preferably an oxidation resistant metal such as stainless steel, a glass such as fused silica glass, a ceramic, carbon, and more preferably a glass such as fused silica glass and carbon.
  • Fused silica has high resistance to high temperature in an oxidizing atmosphere, and it is difficult to form a defect on the preform substrate 10P in contact with the molding surface 31, and a bent substrate 10 with few scratches is obtained.
  • Carbon has high thermal conductivity and can efficiently produce the bent substrate 10.
  • a film of metal, oxide, carbon or the like may be formed on the molding surface 31 of the molding die 30.
  • the guide member 50 is formed in a pin shape, and has a straight portion 51 and an inclined portion 52.
  • the straight portion 51 is formed in a cylindrical shape
  • the inclined portion 52 is formed in a conical shape.
  • the guide member 50 has a shape in which the inclined portion 52 has a cross-sectional area gradually increasing downward.
  • the guide member 50 is erected around the molding surface 31 of the molding die 30 by fitting the straight portion 51 into the fitting recess 33 of the molding die 30.
  • the upper end portion of the straight portion 51 slightly protrudes from the upper surface of the mold 30 while the guide member 50 is fitted in the fitting recess 33.
  • the projecting dimension of the straight portion 51 from the upper surface of the mold 30 is preferably 0 mm or more at a position closest to the molding surface 31 and is preferably the same dimension or less as the thickness t of the preform substrate 10P.
  • the guide member 50 has a linear guide portion 53 on the forming surface 31 side of the inclined portion 52 in a state where the straight portion 51 is fitted in the fitting recess 33 of the forming die 30 and mounted on the forming die 30.
  • the guide portion 53 is inclined from the outside of the molding surface 31 toward the edge of the molding surface 31, and the peripheral portion of the preform base 10P is point-contacted with the guide portion 53.
  • the guide portion 53 of the guide member 50 has a coefficient of static friction at a forming temperature when forming the preform base 10P into the bending base 10 to be 0.5 or less.
  • a temperature at which the equilibrium viscosity of the preform base material 10P becomes 10 17 Pa ⁇ s or less is preferable to be higher than the glass transition temperature or lower.
  • 500 ° C. to 700 ° C. are preferable.
  • 0.5 or less is preferable and, as for the static friction coefficient of the guide part 53, 0.3 or less is more preferable. This is to suppress local deformation of the preform base material 10P due to contact resistance with the guide portion 53.
  • the lower limit of the coefficient of static friction of the guide portion 53 is not particularly limited, but is preferably 0.01 or more, and more preferably 0.05 or more. This is to prevent extreme displacement of the position of the preform base 10P at the time of initial installation of the preform base 10P.
  • the static friction coefficient can be measured by the method described in JIS K 7125.
  • the guide portion 53 has a surface roughness of 50 nm to 1000 nm.
  • 1000 nm or less is preferable and, as for surface roughness Ra of the guide part 53, 500 nm or less is more preferable. This is because the contact surface with the preform substrate 10P maintains a certain level of surface strength.
  • 50 nm or more is preferable and, as for surface roughness Ra of the guide part 53, 100 nm or more is more preferable. This is to reduce the true contact surface with the preform substrate 10P to reduce the resistance due to friction and to prevent the local deformation of the preform substrate 10P.
  • the guide portion 53 has an inclination angle of 45 ° to 89 ° with respect to the bottom surface of the straight portion 51.
  • 89 degrees or less are preferable and, as for the inclination angle of the guide part 53, 80 degrees or less are more preferable. This is to reduce the vertical stress between the preform base 10P and the guide portion 53 at the time of molding to reduce the frictional force and to suppress the local deformation of the preform base 10P.
  • 45 degrees or more are preferable and, as for the inclination of the guide part 53, 50 degrees or more are more preferable. This is to prevent the preform base material 10P from being locally deformed while finally riding on the guide portion 53.
  • the material of the guide member 50 is preferably an oxidation resistant metal such as stainless steel, a glass such as fused silica glass, a ceramic, or carbon. Moreover, it is preferable that the low friction material is coated on the guide part 53 which the guide member 50 contacts the peripheral part of the preform base material 10P at least. As a coating of this low friction material, tungsten disulfide (WS 2 ), molybdenum disulfide (MoS 2 ), boron nitride (BN) or the like is preferable. As the guide member 50, for example, a coating such as carbon may be formed on the outer peripheral surface, or may be formed of a single carbon. Alternatively, the edge of the glass may be coated.
  • the low friction material As the coating of the low friction material, tungsten disulfide (WS 2 ), molybdenum disulfide (MoS 2 ), boron nitride (BN), carbon (C) or the like is preferable. Then, the low friction material is coated at least on the guide portion 53, the glass edge portion, or the material of the guide member 50 itself is selected, whereby the guide portion 53 has a desired coefficient of static friction.
  • the forming die 30 of the forming apparatus 20 for forming the flexible substrate 10 is moved as one cycle inside a heating furnace (not shown) having an in / out zone, a heating zone, and a slow cooling zone. And the shaping
  • FIG. 9 is a view for explaining a method of forming the flexible base 10 using the forming apparatus 20, and FIGS. 9A to 9C are perspective views of the forming apparatus 20 in the forming process.
  • FIG. 10 is a plan view of a part of the forming apparatus 20 for explaining the variation and the positioning of the outer shape of the preform base 10P by the forming.
  • a preform substrate 10P having an outer shape obtained by flattening the bending substrate 10 with a uniform distribution load by simulation is prepared (see FIGS. 4 and 5).
  • the preform base material 10P is set in the molding apparatus 20. Specifically, the preform base 10P is placed on the inside of the plurality of guide members 50 from above the forming die 30 of the forming apparatus 20 by a transfer mechanism (not shown). At this time, the flat preform base 10P has a larger outer shape in plan view than the molding surface 31 having the same outer shape in plan view as the bending base 10. For this reason, as shown in FIG. 10, the peripheral portion of the preform base material 10P protrudes from the molding surface 31, and contacts the guide portion 53 of the inclined portion 52 of the guide member 50 erected around the molding surface 31. And locked (see dotted line in FIG.
  • the preform base material 10P is supported at its peripheral edge portion by the inclined portion 52 of the guide member 50, and is disposed at a position spaced upward with respect to the molding surface 31.
  • the mold 30 is heated to about 400 ° C. in a heating furnace.
  • Molding process The mold 30 moves to the heating zone of the furnace. Thereby, preform base material 10P is heated to molding temperature.
  • the preform base 10P is softened by being heated to the molding temperature. Then, since the peripheral portion of the preform base 10P is in contact with the guide portion 53 of the guide member 50, the central portion of the preform base 10P hangs down by its own weight. As a result, the outer shape of the preform base material 10P gradually decreases in plan view, and the peripheral edge in contact with the guide portion 53 slides down by its own weight while contacting the guide portion 53. Thereby, as shown in FIG. 9C, the preform base material 10P is guided to the molding surface 31 by the guide portion 53, and as shown in FIG. 10, is molded while being aligned with the molding surface 31.
  • preform base material 10P It is disposed so as to be suspended by its own weight on the molding surface 31 of the mold 30 (see a solid line in FIG. 10).
  • the preform substrate 10P has the center of gravity side or the lower side of the inclination first. Sliding down, the edge of one end contacts the straight portion 51 of the guide member 50.
  • the center part of the preform base material 10P approaches the molding surface 31 with the contact point with the straight portion 51 as a base point.
  • the edge other than the end slides down while contacting the guide portion 53, and is aligned with the molding surface 31 and disposed on the molding surface 31.
  • the slip property may be improved by applying vibration to the guide member 50.
  • the vacuum pump is driven in a state where the preform substrate 10P is disposed on the molding surface 31 of the molding die 30, and the suction hole 32 formed in the molding surface 31 allows the space between the molding surface 31 and the preform substrate 10P. Air is aspirated. Thereby, the preform base material 10P is brought into close contact with the molding surface 31 in a state of being positioned on the molding surface 31 with high accuracy, and the curved surface shape of the molding surface 31 is transferred to be the bent substrate 10 of a desired curved shape. Ru.
  • the preform base material 10P may not only provide a curved surface shape by suction with a vacuum pump, but may press at least a part of the top surface of the preform base material 10P from the top surface, or may combine these.
  • the coefficient of static friction of the guide portion 53 of the molding die 30 is 0.1, and the molding temperature is 630 ° C.
  • FIGS. 11A to 11F are schematic perspective views of the molding apparatus 20 in the molding process
  • FIGS. 12A to 12F are schematic side views of the molding apparatus 20 in the molding process
  • FIGS. 13 (a) to 13 (f) are schematic plan views of the forming apparatus 20 in the forming process.
  • the preform base 10P When the preform base 10P is heated to the molding temperature (630 ° C.) from the state where the preform base 10P is set in the molding die 30 (see FIGS. 11 (a), 12 (a) and 13 (a))
  • the preform base material 10P whose peripheral edge portion is supported by the guide portion 53 is slightly bent at its center by its own weight about 1 second after setting, and the outer shape in a plan view becomes slightly smaller.
  • the preform base material 10P slips down first on the center of gravity side, and the edge of one end contacts the straight portion 51 of the guide member 50 (FIG. 11 (b), FIG. 12 (b) and FIG. b) see).
  • the preform base material 10P is further softened to increase the deflection due to its own weight, and the central portion thereof approaches the molding surface 31 (FIG. 11 (c), FIG. 12 (c) and FIG. 13). (See (c)), the edges other than one end slide down while contacting the guide portion 53.
  • the preform substrate 10P is positioned on the molding surface 31, and the peripheral edge portion contacts the straight portion 51 of the guide member 50, and the outer peripheral side of the main surface 11 contacts the molding surface 31 ( 11 (d), 12 (d) and 13 (d)).
  • the preform substrate 10P After about 110 seconds from the set time, the preform substrate 10P has a slight gap in the central portion with respect to the molding surface 31, and the other portions except the central portion are in close contact (FIG. 11 (e)) 12 (e) and 13 (e)).
  • a high quality bending base material at least a part of which is curved by hanging down the preform base material 10P along the molding surface 31. 10 can be easily molded. Moreover, when forming the preform base material 10P into the bending base material 10 by its own weight, the peripheral portion of the preform base material 10P is guided toward the periphery of the molding surface 31 by the guide portion 53 of the guide member 50. The preform base 10P can be accurately positioned on the molding surface 31 having the same outer shape as the outer shape of the base 10. As a result, it is possible to eliminate the need for complicated post-processing of grinding after molding to finish the outer shape into the final outer shape.
  • the preform base material 10P can be positioned with high accuracy to the molding surface 31 of the molding die 30, and the high quality bent base material 10 can be easily molded.
  • the molding surface 31 having the same outer shape as the outer shape of the bending base material 10
  • the outer shape of the bending base material 10 and the outer shape of the molding surface 31 do not have to be completely identical, and at least a part thereof may be matched. It is preferable to match 50% or more, and more preferably 70% or more.
  • the peripheral edge portion of the preform base material 10P which is suspended by its own weight by the guide portion 53 of the guide member 50 provided at the opposing position across the molding surface 31 in the direction of bending the preform base material 10P.
  • the preform base 10P can be positioned on the molding surface 31 with high accuracy.
  • the slip of the peripheral portion of the preform base 10P with respect to the guide portion 53 of the guide member 50 is good. it can. Thereby, the peripheral edge portion of the preform base material 10P is smoothly guided to the edge portion of the molding surface 31 by the guide portion 53.
  • the preform substrate 10P into an outer shape when the bending substrate 10 is made flat, when the preform substrate 10P is formed into the bending substrate 10, the formed bending is performed.
  • the substrate 10 can be precisely shaped to the target.
  • the preform substrate 10P is firmly adhered to the molding surface 31 by the adsorption process.
  • the molding accuracy can be further enhanced to improve the quality.
  • a part of the peripheral portion of the preform base 10P is engaged with the straight portion 51 of the guide member 50.
  • the preform base material 10P hangs down obliquely due to the deviation of the center of gravity or the inclination at the time of mounting, the lower edge is locked to the straight portion 51, and then the other portion of the peripheral edge is It is guided by the guide portion 53 of the guide member 50 and positioned on the molding surface.
  • the preform base 10P can be reliably positioned on the molding surface 31.
  • peripheral edge portion of the preform base material 10P is accurately guided to the edge portion of the molding surface 31 while being in point contact with the linear guide portion 53 of the guide member 50 formed in a pin shape.
  • a peripheral part is ground
  • it can be used as various base materials, such as a mirror of a head-up display, and a cover glass of vehicle-mounted goods, without chamfering.
  • FIG. 14 is a perspective view of a molding apparatus 20 used in another embodiment.
  • FIG. 15 is a plan view of a molding apparatus 20 used in another embodiment.
  • FIG. 16 is a perspective view of the molding device 20 and the guide member 70. As shown in FIG.
  • a bending base 10 is formed using a mold 30 having a pair of guide members 70 formed in a block shape together with a guide member 50 formed in a pin shape. Molding.
  • the guide members 70 are disposed at mutually opposing positions.
  • the guide member 70 also has a straight portion 71 and a sloped portion 72, and the sloped portion 72 has a shape in which the cross-sectional area gradually increases toward the lower side.
  • the molding surface 31 side of the inclined part 72 is planar
  • the guide portion 73 of the The peripheral edge portion of the preform base 10P is in contact with the guide portion 73 of the guide member 70.
  • the guide portion 73 is inclined from the outside of the molding surface 31 toward the edge of the molding surface 31.
  • the guide portion 73 is formed in a wide shape, whereby the peripheral portion of the preform base 10P is in line contact with the guide portion 73.
  • FIG. 17 is a view for explaining the method for forming the flexible base 10 using the forming apparatus 20, and FIGS. 17 (a) to 17 (c) are perspective views of the forming apparatus 20 in the forming process.
  • a preform base 10P obtained by flattening the bending base 10 with uniform distribution load by simulation is prepared (see FIGS. 4 and 5).
  • the preform base 10P is set to the forming die 30 of the forming apparatus 20 by the transport mechanism. Specifically, the preform base 10P is placed on the inside of the plurality of guide members 50 and 70 erected on the forming die 30 from above the forming surface 31 of the forming die 30. At this time, the flat preform base 10P having a large outer shape in a plan view with respect to the bending base 10 has inclined portions 52 and 72 of the guide members 50 and 70 whose peripheral edge portion is erected around the molding surface 31. Is abutted against the guide portions 53 and 73 of the
  • the mold 30 is moved to the heating zone of the furnace, and the preform substrate 10P is heated to the molding temperature.
  • the preform base material 10P is softened by being heated to the molding temperature, as shown in FIG. 17B, the peripheral edge portion is in contact with the guide portions 53 and 73 of the guide members 50 and 70, The central part hangs down by its own weight.
  • the outer shape of the preform base material 10P gradually decreases in plan view, and the peripheral edge in contact with the guide portions 53 and 73 slides down by its own weight while contacting the guide portions 53 and 73.
  • the preform base material 10P is guided to the molding surface 31 by the guide portions 53 and 73, thereby being aligned with the molding surface 31, and the molding surface of the molding die 30 It is placed by hanging down on its own weight.
  • the guide member 70 is formed in a wide shape, the preform base material 10P slides down while the edges of the both ends thereof are in line contact with the guide portion 73 formed by the surface of the guide member 70.
  • the preform substrate 10P has the center of gravity side or the lower side of the inclination first. Sliding down, the edge of one end contacts the straight portion 71 of the guide member 70. Then, when the deflection due to its own weight increases due to the subsequent softening of the preform base material 10P, the center part of the preform base material 10P approaches the molding surface 31 starting from the contact point with the straight part 71 and other than one end. The edge of the slider slides down while in contact with the guide portions 53 and 73, and is positioned on the molding surface 31 in alignment with the molding surface 31.
  • the vacuum pump is driven in a state where the preform substrate 10P is disposed on the molding surface 31 of the molding die 30, and the suction hole 32 formed in the molding surface 31 allows the space between the molding surface 31 and the preform substrate 10P. Air is aspirated. Thereby, the preform base material 10P is brought into close contact with the molding surface 31 in a state of being positioned on the molding surface 31 with high accuracy, and the curved surface shape of the molding surface 31 is transferred to be the bent substrate 10 of a desired curved shape. Ru.
  • the peripheral portion of the preform base material 10P is formed on the molding surface 31 by the guide portions 53, 73 of the guide members 50, 70.
  • the preform base 10P can be accurately positioned on the molding surface 31 having the same outer shape as the outer shape of the bending base 10. As a result, it is possible to eliminate the need for complicated post-processing of grinding after molding to finish the outer shape into the final outer shape.
  • the preform substrate 10P can be positioned with high accuracy to the molding surface 31 of the mold 30, and the high-quality bent substrate 10 can be easily molded.
  • the molding die 30 accurately guides the edge portion of the preform base 10P to the edge portion of the molding surface 31 while making line contact with the planar guide portion 73 of the guide member 70 formed in a block shape.
  • the bending base 10 of the curved shape is molded by the molding surface 31 recessed downward is illustrated, the bending base 10 of the curved shape is molded by the molding surface 31 which bulges upward.
  • the base material 10 may be formed so as to be unevenly curved on the front and back sides by the forming surface 31 which is curved up and down.
  • the guide portions 53, 73 of the inclined portions 52, 72 of the guide members 50, 70 may have a gentle shape for guiding the peripheral portion of the preform base material 10P to the edge of the molding surface 31. Not exclusively.
  • the guide portions 53 and 73 may have, for example, a curved shape that gently dents, or may have a curved shape that bulges gently.
  • a conical pin-shaped guide member 50 or Not limited to the wide block-shaped guide member 70, for example, a triangular pyramid or the like may be used.
  • the mold 30 may be provided with the guide member 50 or the guide member 70 only on the end side in the direction of bending (Y direction).
  • boards such as not only a glass plate but ceramics, resin, a wood, a metal, etc. may be sufficient.
  • a plurality of guide members may have the same shape as in the embodiment shown in FIG. 6, and as in the other embodiment shown in FIG. May have different shapes.
  • the preform substrate may be brought into contact with all of the plurality of guide members when it is set in the molding apparatus.
  • the preform substrate is brought into contact with a portion of the plurality of guide members when set in the molding apparatus, and the number of the plurality of guide members brought into contact is increased when the preform substrate hangs down. May be
  • a manufacturing method for forming a preform substrate into a bent substrate at least a part of which is curved along a molding surface of a mold In the vertical direction at an arbitrary point of the molding surface, assuming that the direction in which the preform base material curves during molding is downward, the opposite direction is upward, and the top surface view is the outside other than the molding surface, A substrate placing step of placing the preform substrate from above the molding surface having the same outer shape as the outer shape of the bent substrate; And forming the preform substrate along the molding surface by its own weight by heating and softening the preform substrate.
  • the preform substrate is placed on a forming die provided with a guide member having a guide portion which inclines from the outside of the forming surface toward the edge of the forming surface,
  • the peripheral edge portion of the preform base material is brought into contact with the guide portion and slipped to guide the peripheral edge portion of the preform base material toward the edge portion of the molding surface.
  • the peripheral portion of the preform base material is guided toward the periphery of the forming surface by the guide portion of the guide member, and therefore the same as the outer shape of the bending base material
  • the preform substrate can be accurately positioned on the molding surface having the outer shape.
  • the said manufacturing method can position a preform base material with high precision to the molding surface of a shaping
  • an adsorption step of suctioning the preform base material onto the molding surface by suction from suction holes provided in the molding surface is performed.
  • flexion base material as described in any one of (1) to (5). According to the manufacturing method of this bending base material, a preform base material is certainly stuck on a molding surface by an adsorption process. As a result, the molding accuracy can be further enhanced to improve the quality.
  • a pin-shaped guide member whose cross-sectional area increases downward is provided in the mold, and the peripheral edge of the preform base material is formed on the guide portion formed in a linear shape of the guide member.
  • flexion base material as described in any one of (1) to (7) which makes a part point contact. According to the manufacturing method of this bending base material, the peripheral edge portion of the preform base material is accurately guided to the edge portion of the forming surface while making point contact with the linear guide portion of the guide member formed in a pin shape.
  • the molding surface having the same outer shape as the outer shape of the bent substrate;
  • a guide member having a guide portion which inclines from the outside of the molding surface toward the edge of the molding surface; Equipped with The guide member guides the peripheral edge of the preform base toward the edge of the molding surface by bringing the peripheral edge of the preform base into contact with the guide and sliding it.
  • Mold of flexible base material According to the mold of the bending base, by hanging the preform base along the molding surface, it is possible to easily form a high quality bending base at least a part of which is curved.
  • the peripheral portion of the preform base material is guided toward the periphery of the forming surface by the guide portion of the guide member, and therefore the same as the outer shape of the bending base material
  • the preform substrate can be accurately positioned on the molding surface having the outer shape.
  • the mold can position the preform base on the molding surface of the mold with high accuracy, and can easily mold a high-quality bent base.

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

This curved substrate production method includes the following steps: a substrate placement step in which a preform substrate (10P) is placed from above on a molding surface (31) having the same external shape as the external shape of a curved substrate (10); and a molding step in which the preform substrate (10P) is heated and softened and the weight thereof causes the preform substrate (10P) to form a curved substrate (10) along the molding surface (31). In the substrate placement step, the preform substrate (10P) is placed on a mold (30) provided with guide members (50) having guide sections (53) that are inclined from outside of the molding surface (31) toward the edge of the molding surface (31). In the molding step, the peripheral edge of the preform substrate (10P) is guided toward the edge of the molding surface (31) by bringing the peripheral edge of the preform substrate (10P) into contact with the guide sections (53) and causing the peripheral edge to slide thereon. As a result, it is possible to perform positioning on the molding surface with high precision and easily mold a high-quality curved substrate.

Description

屈曲基材の製造方法及び屈曲基材の成形型METHOD FOR MANUFACTURING BENDING SUBSTRATE AND MOLDING TYPE FOR BENDING SUBSTRATE
　本発明は、屈曲基材の製造方法及び屈曲基材の成形型に関する。 The present invention relates to a method of manufacturing a flexible substrate and a mold for the flexible substrate.
　平坦状の板ガラスを所望の形状に成形する技術として、型を傾けることで平坦な板ガラスの一方の縁部を型の位置合わせピンに当接させ、その状態で加熱することで、板ガラスを型の成形面上へサギングさせて成形ガラス物品の表面形状をとるように形成する技術が知られている（特許文献１参照）。 As a technique for forming a flat sheet glass into a desired shape, one edge of the flat sheet glass is brought into contact with a mold alignment pin by tilting the mold, and the sheet glass is heated by heating in this state. There is known a technique of forming a surface shape of a formed glass article by sagging on a forming surface (see Patent Document 1).
日本国特許第５６３９６５８号公報Japanese Patent No. 5639658 gazette
　ところで、上記のように、単に板ガラスを成形面上へサギングさせただけでは、成形後の屈曲基材の外形を目標とする最終外形に合わせるのが困難である。このため、上記の成形方法では外形寸法精度の悪いガラス物品になるおそれがあった。上記の成形方法で外形寸法精度を向上するためには、成形後に成形ガラス物品の周縁部を研削して目標とする最終外形に仕上げる煩雑な後加工が必要であった。
　しかも、上記成形方法では、型を傾けて板ガラスを成形するため、板ガラスに偏って重力が作用し、歪みが生じて品質が低下するおそれがあった。 By the way, as described above, it is difficult to match the outer shape of the bent base material after molding to the target final outer shape simply by sagging the sheet glass onto the forming surface. For this reason, there existed a possibility that it might become a glass article with bad outside dimension accuracy by said formation method. In order to improve the external dimension accuracy by the above-mentioned forming method, it is necessary to perform complicated post-processing in which the peripheral portion of the formed glass article is ground after the forming to finish the final shape to be a target.
Moreover, in the above-described forming method, since the mold is inclined to form the plate glass, gravity is biased to the plate glass to cause distortion, which may deteriorate the quality.
　本発明の目的は、成形面へ高精度に位置決めして高品質な屈曲基材を容易に成形できる屈曲基材の製造方法及び屈曲基材の成形型を提供することにある。 An object of the present invention is to provide a method of manufacturing a flexible substrate that can be accurately positioned on a forming surface and easily form a high-quality flexible substrate, and a mold for the flexible substrate.
　本発明は下記構成からなる。
（１）　プリフォーム基材を成形型の成形面に沿わせて少なくとも一部が湾曲した屈曲基材に成形する製造方法であって、
　前記成形面の任意の点における鉛直方向のうち、前記プリフォーム基材が成形時に湾曲する方向を下方、反対向きを上方、上面視において前記成形面以外を外側とすると、
　前記屈曲基材の外形と同一外形を有する前記成形面の上方から前記プリフォーム基材を載置させる基材載置工程と、
　前記プリフォーム基材を加熱して軟化させることで、自重によって前記プリフォーム基材を前記成形面に沿わせて前記屈曲基材に成形する成形工程と、を含み、
　前記基材載置工程において、前記成形面の外側から前記成形面の縁部へ向かって傾斜するガイド部を有するガイド部材を備えた成形型に前記プリフォーム基材を載置させ、
　前記成形工程において、前記プリフォーム基材の周縁部を前記ガイド部に接触させて滑らせることで前記プリフォーム基材の周縁部を前記成形面の縁部に向かって案内させる、
　屈曲基材の製造方法。
（２）　プリフォーム基材を成形型の成形面に沿わせて少なくとも一部が湾曲した屈曲基材に成形する成形型であって、
　前記屈曲基材の外形と同一外形を有する前記成形面と、
　前記成形面の外側から前記成形面の縁部へ向かって傾斜するガイド部を有するガイド部材と、
を備え、
　前記ガイド部材は、前記プリフォーム基材の周縁部を前記ガイド部に接触させて滑らせることで、前記プリフォーム基材の周縁部を前記成形面の縁部に向かって案内する、
　屈曲基材の成形型。 The present invention has the following constitution.
(1) A manufacturing method for forming a preform substrate into a bent substrate at least a part of which is curved along a molding surface of a mold,
In the vertical direction at an arbitrary point of the molding surface, assuming that the direction in which the preform base material curves during molding is downward, the opposite direction is upward, and the top surface view is the outside other than the molding surface,
A substrate placing step of placing the preform substrate from above the molding surface having the same outer shape as the outer shape of the bent substrate;
And forming the preform substrate along the molding surface by its own weight by heating and softening the preform substrate.
In the substrate placing step, the preform substrate is placed on a forming die provided with a guide member having a guide portion which inclines from the outside of the forming surface toward the edge of the forming surface,
In the forming step, the peripheral edge portion of the preform base material is brought into contact with the guide portion and slipped to guide the peripheral edge portion of the preform base material toward the edge portion of the molding surface.
Method of producing a flexible substrate
(2) A mold for forming a preform base material into a bent base material at least a part of which is curved along a molding surface of the mold,
The molding surface having the same outer shape as the outer shape of the bent substrate;
A guide member having a guide portion which inclines from the outside of the molding surface toward the edge of the molding surface;
Equipped with
The guide member guides the peripheral edge of the preform base toward the edge of the molding surface by bringing the peripheral edge of the preform base into contact with the guide and sliding it.
Mold of flexible base material.
　本発明によれば成形面へ高精度に位置決めして高品質な屈曲基材を容易に成形できる。 According to the present invention, it is possible to easily form a high quality bent base material by positioning the forming surface with high accuracy.
本実施形態に係る屈曲基材の斜視図である。It is a perspective view of the bending base material concerning this embodiment. 本実施形態に係る屈曲基材の平面図である。It is a top view of the bending base material concerning this embodiment. 本実施形態に係る屈曲基材の縁部における断面図である。It is sectional drawing in the edge of the bending | flexion base material which concerns on this embodiment. 屈曲基材及びプリフォーム基材の斜視図である。It is a perspective view of a bending | flexion base material and a preform base material. 屈曲基材及びプリフォーム基材の平面図である。It is a top view of a bending | flexion base material and a preform base material. プリフォーム基材を屈曲基材に成形する成形装置の斜視図である。It is a perspective view of a shaping | molding apparatus which shape | molds a preform base material in a bending base material. プリフォーム基材を屈曲基材に成形する成形装置の平面図である。It is a top view of the shaping | molding apparatus which shape | molds a preform base material in a bending base material. 成形装置及びガイド部材の斜視図である。It is a perspective view of a shaping | molding apparatus and a guide member. 成形装置を用いた屈曲基材の成形方法を説明する図であって、（ａ）から（ｃ）は、それぞれ成形工程における成形装置の斜視図である。It is a figure explaining the shaping | molding method of the bending | flexion base material using a shaping | molding apparatus, Comprising: (a) to (c) is a perspective view of the shaping | molding apparatus in a shaping | molding process, respectively. 成形によるプリフォーム基材の外形の変動及び位置決めについて説明する成形装置の一部の平面図である。It is a top view of a part of molding device explaining variation and positioning of a profile of a preform base material by molding. プリフォーム基材を屈曲基材に成形する成形の具体例を説明する図であって、（ａ）から（ｆ）は、それぞれ成形工程における成形装置の概略斜視図である。It is a figure explaining the example of shaping | molding which shape | molds a preform base material in a bending base material, Comprising: (a)-(f) is a schematic perspective view of the shaping | molding apparatus in a shaping | molding process, respectively. プリフォーム基材を屈曲基材に成形する成形の具体例を説明する図であって、（ａ）から（ｆ）は、それぞれ成形工程における成形装置の概略側面図である。It is a figure explaining the example of shaping | molding which shape | molds a preform base material in a bending base material, Comprising: (a)-(f) is a schematic side view of the shaping | molding apparatus in a shaping | molding process, respectively. プリフォーム基材を屈曲基材に成形する成形の具体例を説明する図であって、（ａ）から（ｆ）は、それぞれ成形工程における成形装置の概略平面図である。It is a figure explaining the example of shaping | molding which shape | molds a preform base material in a bending base material, Comprising: (a)-(f) is a schematic plan view of the shaping | molding apparatus in a shaping | molding process, respectively. 他の実施形態で用いられる成形装置の斜視図である。It is a perspective view of the shaping | molding apparatus used by other embodiment. 他の実施形態で用いられる成形装置の平面図である。It is a top view of the shaping | molding apparatus used by other embodiment. 成形装置及びガイド部材の斜視図である。It is a perspective view of a shaping | molding apparatus and a guide member. 成形装置を用いた屈曲基材の成形方法を説明する図であって、（ａ）から（ｃ）は、それぞれ成形工程における成形装置の斜視図である。It is a figure explaining the shaping | molding method of the bending | flexion base material using a shaping | molding apparatus, Comprising: (a) to (c) is a perspective view of the shaping | molding apparatus in a shaping | molding process, respectively.
　以下、本発明の実施形態について、図面を参照して詳細に説明する。
　なお、屈曲基材１０としてガラス板を例示して説明する。
　図１は、本実施形態に係る屈曲基材１０の斜視図である。図２は、本実施形態に係る屈曲基材１０の平面図である。図３は、本実施形態に係る屈曲基材１０の縁部における断面図である。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In addition, a glass plate is illustrated and demonstrated as the bending | flexion base material 10. FIG.
FIG. 1 is a perspective view of a bending base material 10 according to the present embodiment. FIG. 2 is a plan view of the bending base material 10 according to the present embodiment. FIG. 3 is a cross-sectional view of the edge portion of the bending base material 10 according to the present embodiment.
　図１及び図２に示すように、屈曲基材１０は、一方の主面１１（図中の下面）と、他方の主面１２（図中の主面１１の反対面である上面）と、を有するガラス板である。この屈曲基材１０は、Ｘ方向及びＹ方向に沿ってそれぞれ下方へ凹状に湾曲した三次元形状を有する基材である。この屈曲基材１０は、例えば、ヘッドアップディスプレイのミラーや車載品のカバーガラス等の基材として用いられる。図３に示すように、屈曲基材１０は、その縁部における角部１３に凸曲面状に面取り加工が施されている。 As shown in FIGS. 1 and 2, the bending base material 10 has one main surface 11 (lower surface in the drawing) and the other main surface 12 (upper surface which is the opposite surface of the main surface 11 in the drawing) Is a glass plate having The bending substrate 10 is a substrate having a three-dimensional shape which is concavely curved downward along the X direction and the Y direction. This bending base material 10 is used, for example, as a base material of a mirror of a head-up display or a cover glass of an on-vehicle product. As shown in FIG. 3, in the bending base material 10, the corner 13 at the edge is chamfered in a convex curved shape.
　屈曲基材１０のＸ方向寸法ａ、Ｙ方向寸法ｂ、板厚ｔは特に限定されない。板厚ｔは、屈曲基材１０の全域で略一定にするのが好ましい。また、板厚ｔは、部分的に変化してもよく、屈曲基材１０の全域で変化しても良い。 The dimension a in the X direction, the dimension b in the Y direction, and the plate thickness t of the bending base material 10 are not particularly limited. The plate thickness t is preferably substantially constant over the entire area of the flexible base 10. Further, the thickness t may be partially changed or may be changed over the entire area of the bending base material 10.
　屈曲基材１０としては、無色透明の非晶質ガラスの他、結晶化ガラスや色ガラス等のガラス板が挙げられる。 As the bending base material 10, glass plates, such as crystallized glass and color glass other than colorless and transparent amorphous glass, are mentioned.
　更に詳細には、ガラスとして、例えば、無アルカリガラス、ソーダライムガラス、ソーダライムシリケートガラス、アルミノシリケートガラス、ボロシリケートガラス、リチウムアルミノシリケートガラス、ホウケイ酸ガラスを使用できる。厚さが薄くても強化処理によって大きな応力が入りやすく薄くても高強度なガラスが得られるアルミノシリケートガラスが好ましい。 More specifically, as the glass, for example, alkali-free glass, soda lime glass, soda lime silicate glass, aluminosilicate glass, borosilicate glass, lithium aluminosilicate glass, borosilicate glass can be used. It is preferable to use an aluminosilicate glass from which a high stress can be easily obtained by a strengthening treatment even if the thickness is thin, even if the thickness is thin.
　ガラス組成の具体例としては、酸化物基準のモル％で表示した組成で、ＳｉＯ2を５０～８０％、Ａｌ2Ｏ3を０．１～２５％、Ｌｉ2Ｏ＋Ｎａ2Ｏ＋Ｋ2Ｏを３～３０％、ＭｇＯを０～２５％、ＣａＯを０～２５％及びＺｒＯ2を０～５％含むガラスが挙げられるが、特に限定されない。より具体的には、以下のガラスの組成が挙げられる。なお、例えば、「ＭｇＯを０～２５％含む」とは、ＭｇＯは必須ではないが２５％まで含んでもよい、の意である。（ｉ）のガラスはソーダライムシリケートガラスに含まれ、（ｉｉ）及び（ｉｉｉ）のガラスはアルミノシリケートガラスに含まれる。（ｖ）のガラスはリチウムアルミノシリケートガラスに含まれる。
（ｉ）酸化物基準のモル％で表示した組成で、ＳｉＯ2を６３～７３％、Ａｌ2Ｏ3を０．１～５．２％、Ｎａ2Ｏを１０～１６％、Ｋ2Ｏを０～１．５％、Ｌｉ2Ｏを０～５％、ＭｇＯを５～１３％及びＣａＯを４～１０％を含むガラス。
（ｉｉ）酸化物基準のモル％で表示した組成が、ＳｉＯ2を５０～７４％、Ａｌ2Ｏ3を１～１０％、Ｎａ2Ｏを６～１４％、Ｋ2Ｏを３～１１％、Ｌｉ2Ｏを０～５％、ＭｇＯを２～１５％、ＣａＯを０～６％及びＺｒＯ2を０～５％含有し、ＳｉＯ2及びＡｌ2Ｏ3の含有量の合計が７５％以下、Ｎａ2Ｏ及びＫ2Ｏの含有量の合計が１２～２５％、ＭｇＯ及びＣａＯの含有量の合計が７～１５％であるガラス。
（ｉｉｉ）酸化物基準のモル％で表示した組成が、ＳｉＯ2を６８～８０％、Ａｌ2Ｏ3を４～１０％、Ｎａ2Ｏを５～１５％、Ｋ2Ｏを０～１％、Ｌｉ2Ｏを０～５％、ＭｇＯを４～１５％及びＺｒＯ2を０～１％含有するガラス。
（ｉｖ）酸化物基準のモル％で表示した組成が、ＳｉＯ2を６７～７５％、Ａｌ2Ｏ3を０～４％、Ｎａ2Ｏを７～１５％、Ｋ2Ｏを１～９％、Ｌｉ2Ｏを０～５％、ＭｇＯを６～１４％及びＺｒＯ2を０～１．５％含有し、ＳｉＯ2及びＡｌ2Ｏ3の含有量の合計が７１～７５％、Ｎａ2Ｏ及びＫ2Ｏの含有量の合計が１２～２０％であり、ＣａＯを含有する場合その含有量が１％未満であるガラス。
（ｖ）酸化物基準のモル％で表示した組成が、ＳｉＯ2を５６～７３％、Ａｌ2Ｏ3を１０～２４％、Ｂ2Ｏ3を０～６％、Ｐ2Ｏ5を０～６％、Ｌｉ2Ｏを２～７％、Ｎａ2Ｏを３～１１％、Ｋ2Ｏを０～２％、ＭｇＯを０～８％、ＣａＯを０～２％、ＳｒＯを０～５％、ＢａＯを０～５％、ＺｎＯを０～５％、ＴｉＯ2を０～２％、ＺｒＯ２を０～４％を含むガラス。 As a specific example of the glass composition, 50 to 80% of SiO 2 , 0.1 to 25% of Al 2 O 3, and 3 to 10% of Li 2 O + Na 2 O + K 2 O are shown in the composition expressed in mol% based on oxide. A glass containing 30%, 0-25% of MgO, 0-25% of CaO and 0-5% of ZrO 2 may be mentioned, but it is not particularly limited. More specifically, the following composition of glass is mentioned. For example, “containing 0 to 25% of MgO” means that MgO is not essential but may contain up to 25%. The glass of (i) is contained in soda lime silicate glass, and the glass of (ii) and (iii) is contained in aluminosilicate glass. The glass of (v) is contained in lithium aluminosilicate glass.
(I) 63 to 73% of SiO 2 , 0.1 to 5.2% of Al 2 O 3 , 10 to 16% of Na 2 O, and K 2 O in the composition expressed in mol% based on the oxide Glass containing 0 to 1.5%, 0 to 5% of Li 2 O, 5 to 13% of MgO and 4 to 10% of CaO.
Composition viewed in mole percent (ii) an oxide basis is, the SiO 2 50 ~ 74%, the Al 2 O 3 1 ~ 10% , a Na 2 O 6 ~ 14%, the K 2 O 3 ~ 11% , Containing 0 to 5% of Li 2 O, 2 to 15% of MgO, 0 to 6% of CaO and 0 to 5% of ZrO 2 , and the total content of SiO 2 and Al 2 O 3 is 75% or less Glass having a total content of Na 2 O and K 2 O of 12 to 25% and a total content of MgO and CaO of 7 to 15%.
(Iii) the composition viewed in mole percent on the oxide basis, of SiO 2 68 ~ 80%, the Al 2 O 3 4 ~ 10% , a Na 2 O 5 ~ 15%, the K 2 O 0 ~ 1% A glass containing 0 to 5% of Li 2 O, 4 to 15% of MgO, and 0 to 1% of ZrO 2 .
(Iv) The composition expressed in mol% based on oxide is 67 to 75% of SiO 2 , 0 to 4% of Al 2 O 3 , 7 to 15% of Na 2 O, and 1 to 9% of K 2 O , 0 to 5% of Li 2 O, 6 to 14% of MgO and 0 to 1.5% of ZrO 2 , the total content of SiO 2 and Al 2 O 3 is 71 to 75%, Na 2 O And a glass wherein the total content of K 2 O is 12 to 20%, and the content of CaO is less than 1%.
(V) the composition viewed in mole percent on the oxide basis, of SiO 2 56 - 73%, the Al 2 O 3 10 ~ 24% , the B 2 O 3 0 ~ 6% , P 2 O 5 0 to 6%, 2 to 7% of Li 2 O, 3 to 11% of Na 2 O, 0 to 2% of K 2 O, 0 to 8% of MgO, 0 to 2% of CaO, 0 to 5% of SrO Glass containing 0 to 5% of BaO, 0 to 5% of ZnO, 0 to 2 % of TiO 2 , and 0 to 4% of ZrO 2 .
　ガラス板は、例えば、化学強化処理を適切に行うため、そのガラス組成におけるＬｉ2ＯとＮａ2Ｏの含有量の合計は１２モル％以上が好ましい。更に、ガラス組成におけるＬｉ2Ｏの含有率が増加するとガラス転移点が下がり成形が容易となるため、Ｌｉ2Ｏの含有率は０．５モル％以上が好ましく、１モル％以上がより好ましく、２モル％以上が更に好ましい。更に、表面圧縮応力（Ｃｏｍｐｒｅｓｓｉｖｅ　Ｓｔｒｅｓｓ；以下、ＣＳとも略す）及び表面圧縮応力層深さ（Ｄｅｐｔｈ　ｏｆ　Ｌａｙｅｒ；以下、ＤＯＬとも略す）を大きくするため、ガラス組成がＳｉＯ2を６０モル％以上、Ａｌ2Ｏ3を８モル％以上含むことが好ましい。 Glass plate, for example, for performing chemical strengthening treatment appropriately, the total content of Li 2 O and Na 2 O in the glass composition is preferably at least 12 mol%. Furthermore, since the content of Li 2 O in the glass composition becomes easy to the molded lower the glass transition temperature increases, the content of Li 2 O is preferably at least 0.5 mol%, more preferably at least 1 mol%, 2 mol% or more is more preferable. Furthermore, in order to increase the surface compressive stress (compressive stress; hereinafter, CS) and the surface compression stress layer (depth, layer: hereinafter, DOL), the glass composition contains 60 mol% or more of SiO 2 , Al It is preferable to contain 8 mol% or more of 2 O 3 .
　更に、ガラス板に着色を行い使用する際は、所望の化学強化特性の達成を阻害しない範囲において着色剤を添加してもよい。例えば、可視域に吸収を持つ、Ｃｏ、Ｍｎ、Ｆｅ、Ｎｉ、Ｃｕ、Ｃｒ、Ｖ、Ｂｉ、Ｓｅ、Ｔｉ、Ｃｅ、Ｅｒ、及びＮｄの金属酸化物である、Ｃｏ3Ｏ４、ＭｎＯ、ＭｎＯ2、Ｆｅ2Ｏ3、ＮｉＯ、ＣｕＯ、Ｃｕ2Ｏ、Ｃｒ2Ｏ3、Ｖ2Ｏ５、Ｂｉ2Ｏ3、ＳｅＯ2、ＴｉＯ2、ＣｅＯ2、Ｅｒ2Ｏ3、Ｎｄ2Ｏ3等が挙げられる。 Furthermore, when coloring and using a glass plate, you may add a coloring agent in the range which does not inhibit achievement of a desired chemical-strengthening characteristic. For example, Co 3 O 4 , MnO, MnO, which are metal oxides of Co, Mn, Fe, Ni, Cu, Cr, V, Bi, Se, Ti, Ce, Er, and Nd, which have absorption in the visible region. 2 , Fe 2 O 3 , NiO, CuO, Cu 2 O, Cr 2 O 3 , V 2 O 5 , Bi 2 O 3 , SeO 2 , TiO 2 , CeO 2 , Er 2 O 3 , Nd 2 O 3 etc. It can be mentioned.
　ガラス板に着色ガラスを用いる場合、ガラス中に酸化物基準のモル百分率表示で、着色成分（Ｃｏ、Ｍｎ、Ｆｅ、Ｎｉ、Ｃｕ、Ｃｒ、Ｖ、Ｂｉ、Ｓｅ、Ｔｉ、Ｃｅ、Ｅｒ、及びＮｄの金属酸化物からなる群より選択される少なくとも１成分）を７％以下の範囲で含有してよい。着色成分が７％を超えると、ガラスが失透しやすくなる。この含量は５％以下が好ましく、３％以下がより好ましく、１％以下が更に好ましい。また、ガラス板は溶融の際の清澄剤として、ＳＯ3、塩化物、フッ化物などを適宜含有してよい。 When colored glass is used for the glass plate, the coloring component (Co, Mn, Fe, Ni, Cu, Cr, V, Bi, Se, Ti, Ce, Er, and Nd) is expressed in terms of mole percentage on an oxide basis in the glass. And at least one component selected from the group consisting of metal oxides of at least 7%. When the coloring component exceeds 7%, the glass tends to be devitrified. The content is preferably 5% or less, more preferably 3% or less, and still more preferably 1% or less. Further, the glass plate may appropriately contain SO 3 , chloride, fluoride and the like as a fining agent at the time of melting.
　ここで、屈曲基材１０の素材として使用できる平板状ガラスであるプリフォーム基材１０Ｐの製造方法について説明する。まず、各成分の原料を前述した組成となるように調合し、ガラス溶融窯で加熱溶融する。バブリング、撹拌、清澄剤の添加等によりガラスを均質化し、公知の成形法により所定の厚さのガラス板を作製し、徐冷する。ガラスの作製法としては、例えば、フロート法、プレス法、フュージョン法、ダウンドロー法及びロールアウト法が挙げられる。特に、大量生産に適したフロート法が好適である。また、フロート法以外の連続作製法、すなわち、フュージョン法及びダウンドロー法も好適である。任意の作製法により平板状に作製されたガラス板は、徐冷後、所望のサイズに切断され、平板状ガラスが得られる。なお、より正確な寸法精度が必要な場合等には、切断後のガラス板に研磨・研削加工や端面加工、孔あけ加工を施してもよい。これにより、加熱工程などでのハンドリングにおいて割れや欠けを低減でき歩留まりを向上できるようになる。 Here, the manufacturing method of preform base material 10P which is flat glass which can be used as a raw material of bending base material 10 is explained. First, the raw materials of the respective components are prepared to have the above-described composition, and are heated and melted in a glass melting furnace. The glass is homogenized by bubbling, stirring, addition of a clarifying agent, etc., and a glass plate of a predetermined thickness is produced by a known forming method and gradually cooled. Examples of the method of producing the glass include a float method, a press method, a fusion method, a downdraw method and a roll out method. In particular, the float method suitable for mass production is preferable. In addition, continuous production methods other than the float method, that is, the fusion method and the downdraw method are also suitable. After slow cooling, the glass plate produced in a flat plate shape by an arbitrary production method is cut into a desired size to obtain a flat glass. In addition, when more accurate dimensional accuracy is required, the glass plate after cutting may be subjected to polishing / grinding, end face processing, or drilling. As a result, cracking and chipping can be reduced in handling in the heating step or the like, and the yield can be improved.
　屈曲基材１０は、処理層を有していてもよい。処理層には特に制限はない。処理層としては、例えば、反射光を散乱させ、光源の映り込みによる反射光の眩しさを低減する効果をもたらす防眩層が挙げられる。処理層は屈曲基材１０自体の主面１１，１２を加工して形成してもよく、別途堆積処理方法により形成してもよい。処理層の形成方法として、例えば、屈曲基材１０の少なくとも一部に化学的処理あるいは物理的処理により表面処理を施せばよい。防眩層の場合、所望の表面粗さの凹凸形状を形成する方法を使用できる。また、処理液を塗布あるいは噴霧する堆積処理方法や、成形等の熱的処理方法により屈曲基材１０の少なくとも一部に凹凸形状を形成してもよい。処理層として、その他、反射防止層（ＡＲ層）や耐指紋拭取層（ＡＦＰ層）を形成してよい。 The bending base 10 may have a treatment layer. The treatment layer is not particularly limited. Examples of the treatment layer include an antiglare layer which scatters reflected light and provides an effect of reducing glare of reflected light due to reflection of a light source. The treatment layer may be formed by processing the main surfaces 11 and 12 of the bending base 10 itself, or may be separately formed by a deposition treatment method. As a method of forming the treatment layer, for example, at least a part of the flexible substrate 10 may be subjected to surface treatment by chemical treatment or physical treatment. In the case of the antiglare layer, a method of forming a concavo-convex shape having a desired surface roughness can be used. In addition, the concavo-convex shape may be formed on at least a part of the bending base material 10 by a deposition treatment method of applying or spraying a treatment liquid, or a thermal treatment method such as molding. In addition, an antireflection layer (AR layer) or an anti-fingerprint wiping layer (AFP layer) may be formed as the processing layer.
　屈曲基材１０がガラスである場合には、成形に使用するガラスの厚さｔとしては０．５ｍｍ以上５ｍｍ以下が好ましい。この下限値以上の厚さを備えたガラスであれば、高い強度と良好な質感を屈曲基材１０が得られる。また、ガラスの厚さｔとしては０．７ｍｍ以上３ｍｍ以下がより好ましく、１ｍｍ以上３ｍｍ以下が更に好ましい。 When the bending base material 10 is glass, as thickness t of glass used for shaping | molding, 0.5 mm or more and 5 mm or less are preferable. If it is glass provided with the thickness more than this lower limit, bending base material 10 is obtained with high strength and good texture. Moreover, as thickness t of glass, 0.7 mm or more and 3 mm or less are more preferable, and 1 mm or more and 3 mm or less are still more preferable.
　図４は、屈曲基材１０及びプリフォーム基材１０Ｐの斜視図である。図５は、屈曲基材１０及びプリフォーム基材１０Ｐの平面図である。 FIG. 4 is a perspective view of the bending base 10 and the preform base 10P. FIG. 5 is a plan view of the bending base 10 and the preform base 10P.
　図４及び図５に示すように、屈曲基材１０は、平坦なプリフォーム基材１０Ｐを湾曲させることで得られたものである。プリフォーム基材１０Ｐは、成形品である屈曲基材１０の形状から逆計算して得られた平坦なガラス板である。具体的には、プリフォーム基材１０Ｐは、屈曲基材１０をシミュレーションによって等分布荷重で平坦にすることで得られたもので、図５に示すように、平面視において、屈曲基材１０よりも大きな外形を有する平坦なガラス板である。 As shown in FIG. 4 and FIG. 5, the bending base material 10 is obtained by curving a flat preform base material 10P. The preform base 10P is a flat glass plate obtained by inverse calculation from the shape of the bending base 10 which is a molded product. Specifically, the preform base material 10P is obtained by flattening the bending base material 10 with equal distribution load by simulation, and as shown in FIG. Is a flat glass plate having a large outer diameter.
　次に、屈曲基材１０を製造する成形装置を説明する。
　図６は、プリフォーム基材１０Ｐを屈曲基材１０に成形する成形装置２０の斜視図である。図７は、プリフォーム基材１０Ｐを屈曲基材１０に成形する成形装置２０の平面図である。図８は、成形装置２０及びガイド部材５０の斜視図である。 Next, a molding apparatus for manufacturing the bending base material 10 will be described.
FIG. 6 is a perspective view of a forming apparatus 20 for forming the preform base 10P on the flexible base 10. As shown in FIG. FIG. 7 is a plan view of a forming apparatus 20 for forming the preform base 10P on the flexible base 10. As shown in FIG. FIG. 8 is a perspective view of the molding device 20 and the guide member 50. As shown in FIG.
　図６及び図７に示すように、成形装置２０は、成形型３０と、ガイド部材５０とを備えている。成形装置２０は、屈曲基材１０の素材である平坦なプリフォーム基材１０Ｐを湾曲させて屈曲基材１０に成形する装置である。 As shown in FIGS. 6 and 7, the molding device 20 includes a molding die 30 and a guide member 50. The forming apparatus 20 is an apparatus for forming a flat preform substrate 10P, which is a material of the flexible substrate 10, into a curved substrate 10 by curving.
　成形型３０は、その上面に、成形面３１を有しており、この成形面３１の周囲にガイド部材５０が設けられている。成形面３１は、Ｙ方向及びＸ方向に沿ってそれぞれ下方へ凹状に湾曲した三次元形状に形成されている。成形面３１は、屈曲基材１０の素材となるプリフォーム基材１０Ｐの一方の主面１１が密着されることで、プリフォーム基材１０Ｐを屈曲基材１０の形状に成形する成形面である。ガイド部材５０は、プリフォーム基材１０Ｐを成形面３１へ案内して位置決めする部材である。この成形面３１を有する成形型３０には、成形面３１の上方からプリフォーム基材１０Ｐが載置される。成形型３０に載置されるプリフォーム基材１０Ｐは、ガイド部材５０によって案内されて成形面３１上へ位置決めされる。具体的に、本実施形態では、プリフォーム基材１０Ｐは、略矩形形状であるため、複数のガイド部材５０は、プリフォーム基材１０Ｐの長手方向（Ｙ方向）両側と、プリフォーム基材１０Ｐの短手方向（Ｘ方向）両側に、それぞれ配置されている。 The mold 30 has a molding surface 31 on the upper surface thereof, and a guide member 50 is provided around the molding surface 31. The molding surface 31 is formed in a three-dimensional shape which is concavely curved downward along the Y direction and the X direction. The molding surface 31 is a molding surface for molding the preform substrate 10P into the shape of the bending substrate 10 by bringing one main surface 11 of the preform substrate 10P, which is a material of the bending substrate 10, into close contact. . The guide member 50 is a member for guiding and positioning the preform base 10P to the molding surface 31. The preform base 10P is placed on the molding die 30 having the molding surface 31 from above the molding surface 31. The preform base 10P placed on the forming die 30 is guided by the guide member 50 and positioned on the forming surface 31. Specifically, in the present embodiment, since the preform base 10P has a substantially rectangular shape, the plurality of guide members 50 have both sides in the longitudinal direction (Y direction) of the preform base 10P, and the preform base 10P. Are respectively disposed on both sides in the short direction (X direction) of.
　成形面３１には、複数の吸引孔３２が形成されている。これらの吸引孔３２には、真空ポンプ（図示略）からの吸引ホース（図示略）が接続されており、真空ポンプによって吸引可能とされている。成形型３０には、その上面における成形面３１の周囲に複数の嵌合凹部３３が形成されており、これらの嵌合凹部３３に、ガイド部材５０が嵌合されて装着されている。これにより、成形型３０には、複数のガイド部材５０が、成形面３１の周囲に間隔をあけて立設されている。 The molding surface 31 has a plurality of suction holes 32 formed therein. A suction hose (not shown) from a vacuum pump (not shown) is connected to these suction holes 32 and can be suctioned by the vacuum pump. The molding die 30 has a plurality of fitting recesses 33 formed around the molding surface 31 on the upper surface thereof, and the guide members 50 are fitted and mounted in the fitting recesses 33. Thus, a plurality of guide members 50 are erected on the periphery of the molding surface 31 in the molding die 30 at intervals.
　成形型３０の材質はステンレス鋼等の耐酸化性のある金属、ヒューズドシリカガラスなどのガラス、セラミック、カーボンが好ましく、ヒューズドシリカガラスなどのガラス及びカーボンがより好ましい。ヒューズドシリカは高温かつ酸化雰囲気での耐性が高く、また成形面３１に接触するプリフォーム基材１０Ｐに欠点を形成しにくく、傷の少ない表面の屈曲基材１０が得られる。カーボンは熱伝導率が高く屈曲基材１０を効率的に生産できる。なお、成形型３０の成形面３１には、金属や酸化物、カーボン等の被膜が形成されていてもよい。 The material of the mold 30 is preferably an oxidation resistant metal such as stainless steel, a glass such as fused silica glass, a ceramic, carbon, and more preferably a glass such as fused silica glass and carbon. Fused silica has high resistance to high temperature in an oxidizing atmosphere, and it is difficult to form a defect on the preform substrate 10P in contact with the molding surface 31, and a bent substrate 10 with few scratches is obtained. Carbon has high thermal conductivity and can efficiently produce the bent substrate 10. A film of metal, oxide, carbon or the like may be formed on the molding surface 31 of the molding die 30.
　図８に示すように、ガイド部材５０は、ピン状に形成されており、ストレート部５１と、傾斜部５２とを有している。ストレート部５１は、円柱状に形成されており、傾斜部５２は、円錐状に形成されている。これにより、ガイド部材５０は、その傾斜部５２が、下方へ向かって断面積が次第に大きくなる形状とされている。 As shown in FIG. 8, the guide member 50 is formed in a pin shape, and has a straight portion 51 and an inclined portion 52. The straight portion 51 is formed in a cylindrical shape, and the inclined portion 52 is formed in a conical shape. Thus, the guide member 50 has a shape in which the inclined portion 52 has a cross-sectional area gradually increasing downward.
　ガイド部材５０は、ストレート部５１を成形型３０の嵌合凹部３３に嵌合させることで、成形型３０の成形面３１の周囲に立設される。ガイド部材５０は、嵌合凹部３３に嵌合された状態で、ストレート部５１の上端部分が成形型３０の上面から僅かに突出される。このストレート部５１の成形型３０の上面からの突出寸法は、成形面３１と最近接する箇所で０ｍｍ以上であり、プリフォーム基材１０Ｐの厚みｔと同一寸法以下が好ましい。 The guide member 50 is erected around the molding surface 31 of the molding die 30 by fitting the straight portion 51 into the fitting recess 33 of the molding die 30. The upper end portion of the straight portion 51 slightly protrudes from the upper surface of the mold 30 while the guide member 50 is fitted in the fitting recess 33. The projecting dimension of the straight portion 51 from the upper surface of the mold 30 is preferably 0 mm or more at a position closest to the molding surface 31 and is preferably the same dimension or less as the thickness t of the preform substrate 10P.
　ガイド部材５０は、成形型３０の嵌合凹部３３にストレート部５１が嵌合されて成形型３０に装着された状態で、傾斜部５２における成形面３１側が線状のガイド部５３とされる。ガイド部５３は、成形面３１の外側から成形面３１の縁部へ向かって傾斜されており、このガイド部５３には、プリフォーム基材１０Ｐの周縁部が点接触される。 The guide member 50 has a linear guide portion 53 on the forming surface 31 side of the inclined portion 52 in a state where the straight portion 51 is fitted in the fitting recess 33 of the forming die 30 and mounted on the forming die 30. The guide portion 53 is inclined from the outside of the molding surface 31 toward the edge of the molding surface 31, and the peripheral portion of the preform base 10P is point-contacted with the guide portion 53.
　ガイド部材５０のガイド部５３は、プリフォーム基材１０Ｐを屈曲基材１０に成形する際の成形温度における静止摩擦係数が０．５以下とされている。プリフォーム基材１０Ｐを屈曲基材１０に成形する際の成形温度としては、ガラス転移点温度以上、融点以下、又はプリフォーム基材１０Ｐの平衡粘性が１０１７Ｐａ・ｓ以下になる温度が好ましく、例えば、５００℃～７００℃が好ましい。なお、ガイド部５３の静止摩擦係数は０．５以下が好ましく、０．３以下がより好ましい。これはガイド部５３との接触抵抗によるプリフォーム基材１０Ｐの局所変形を抑制するためである。また、ガイド部５３の静止摩擦係数は下限値に特に制限はないが、０．０１以上が好ましく、０．０５以上がより好ましい。これはプリフォーム基材１０Ｐの初期設置時にプリフォーム基材１０Ｐの位置が極端にずれないようにするためである。なお、静摩擦係数は、JIS K 7125に記載の方法で測定できる。 The guide portion 53 of the guide member 50 has a coefficient of static friction at a forming temperature when forming the preform base 10P into the bending base 10 to be 0.5 or less. As a molding temperature when forming the preform base material 10P into the bending base material 10, a temperature at which the equilibrium viscosity of the preform base material 10P becomes 10 17 Pa · s or less is preferable to be higher than the glass transition temperature or lower. For example, 500 ° C. to 700 ° C. are preferable. In addition, 0.5 or less is preferable and, as for the static friction coefficient of the guide part 53, 0.3 or less is more preferable. This is to suppress local deformation of the preform base material 10P due to contact resistance with the guide portion 53. The lower limit of the coefficient of static friction of the guide portion 53 is not particularly limited, but is preferably 0.01 or more, and more preferably 0.05 or more. This is to prevent extreme displacement of the position of the preform base 10P at the time of initial installation of the preform base 10P. The static friction coefficient can be measured by the method described in JIS K 7125.
　ガイド部５３は、表面粗さが５０ｎｍ～１０００ｎｍとされている。なお、ガイド部５３の表面粗さＲａは１０００ｎｍ以下が好ましく、５００ｎｍ以下がより好ましい。これはプリフォーム基材１０Ｐとの接触面がある程度の面強度を保つためである。また、ガイド部５３の表面粗さＲａは５０ｎｍ以上が好ましく、１００ｎｍ以上がより好ましい。これはプリフォーム基材１０Ｐとの真実接触面を減らして摩擦による抵抗力を減らし、プリフォーム基材１０Ｐの局所変形を防ぐためである。 The guide portion 53 has a surface roughness of 50 nm to 1000 nm. In addition, 1000 nm or less is preferable and, as for surface roughness Ra of the guide part 53, 500 nm or less is more preferable. This is because the contact surface with the preform substrate 10P maintains a certain level of surface strength. Moreover, 50 nm or more is preferable and, as for surface roughness Ra of the guide part 53, 100 nm or more is more preferable. This is to reduce the true contact surface with the preform substrate 10P to reduce the resistance due to friction and to prevent the local deformation of the preform substrate 10P.
　ガイド部５３は、ストレート部５１の底面に対する傾斜角度が４５°～８９°とされている。なお、ガイド部５３の傾斜角度は８９°以下が好ましく、８０°以下がより好ましい。これは成形時のプリフォーム基材１０Ｐとガイド部５３との垂直応力を減らして摩擦力を減らし、プリフォーム基材１０Ｐの局所変形を抑えるためである。また、ガイド部５３の傾斜は４５°以上が好ましく、５０°以上がより好ましい。これはプリフォーム基材１０Ｐが最終的にガイド部５３に乗り上げたままとなって局所変形するのを防ぐためである。 The guide portion 53 has an inclination angle of 45 ° to 89 ° with respect to the bottom surface of the straight portion 51. In addition, 89 degrees or less are preferable and, as for the inclination angle of the guide part 53, 80 degrees or less are more preferable. This is to reduce the vertical stress between the preform base 10P and the guide portion 53 at the time of molding to reduce the frictional force and to suppress the local deformation of the preform base 10P. Moreover, 45 degrees or more are preferable and, as for the inclination of the guide part 53, 50 degrees or more are more preferable. This is to prevent the preform base material 10P from being locally deformed while finally riding on the guide portion 53.
　ガイド部材５０の材質はステンレス鋼等の耐酸化性のある金属、ヒューズドシリカガラスなどのガラス、セラミック、カーボンが好ましい。また、ガイド部材５０は、少なくともプリフォーム基材１０Ｐの周縁部が接触するガイド部５３に、低摩擦材をコーティングしておくのが好ましい。この低摩擦材のコーティングとしては、二硫化タングステン（ＷＳ２）、二硫化モリブデン（ＭｏＳ2）、窒化ホウ素（ＢＮ）などが好ましい。ガイド部材５０としては、例えば、外周面にカーボン等の被膜を形成してもよく、また、カーボン単体から形成してもよい。また、ガラスの縁部にコーティングしても良い。低摩擦材のコーティングとしては、二硫化タングステン（ＷＳ２）、二硫化モリブデン（ＭｏＳ2）、窒化ホウ素（ＢＮ）、カーボン（Ｃ）などが好ましい。そして、低摩擦材を少なくともガイド部５３にコーティングしたり、ガラス縁部にコーティングしたり、ガイド部材５０自体の材質を選択することで、ガイド部５３が所望の静止摩擦係数とされている。 The material of the guide member 50 is preferably an oxidation resistant metal such as stainless steel, a glass such as fused silica glass, a ceramic, or carbon. Moreover, it is preferable that the low friction material is coated on the guide part 53 which the guide member 50 contacts the peripheral part of the preform base material 10P at least. As a coating of this low friction material, tungsten disulfide (WS 2 ), molybdenum disulfide (MoS 2 ), boron nitride (BN) or the like is preferable. As the guide member 50, for example, a coating such as carbon may be formed on the outer peripheral surface, or may be formed of a single carbon. Alternatively, the edge of the glass may be coated. As the coating of the low friction material, tungsten disulfide (WS 2 ), molybdenum disulfide (MoS 2 ), boron nitride (BN), carbon (C) or the like is preferable. Then, the low friction material is coated at least on the guide portion 53, the glass edge portion, or the material of the guide member 50 itself is selected, whereby the guide portion 53 has a desired coefficient of static friction.
　屈曲基材１０を成形する成形装置２０の成形型３０は、搬出入ゾーン、加熱ゾーン及び徐冷ゾーンを有する加熱炉（図示略）の内部を一周期として移動される。そして、成形型３０は、加熱炉の搬出入ゾーン、加熱ゾーン及び徐冷ゾーンの移動が繰り返されることで、屈曲基材１０を連続生産する。 The forming die 30 of the forming apparatus 20 for forming the flexible substrate 10 is moved as one cycle inside a heating furnace (not shown) having an in / out zone, a heating zone, and a slow cooling zone. And the shaping | molding die 30 produces the bending base material 10 continuously by the movement of the loading / unloading zone of a heating furnace, a heating zone, and a slow cooling zone being repeated.
　次に、上記の成形装置２０を用いた屈曲基材１０の成形方法について説明する。
　図９は、成形装置２０を用いた屈曲基材１０の成形方法を説明する図であって、図９の（ａ）から（ｃ）は、それぞれ成形工程における成形装置２０の斜視図である。図１０は、成形によるプリフォーム基材１０Ｐの外形の変動及び位置決めについて説明する成形装置２０の一部の平面図である。 Next, a method of forming the flexible base 10 using the above-described forming apparatus 20 will be described.
FIG. 9 is a view for explaining a method of forming the flexible base 10 using the forming apparatus 20, and FIGS. 9A to 9C are perspective views of the forming apparatus 20 in the forming process. FIG. 10 is a plan view of a part of the forming apparatus 20 for explaining the variation and the positioning of the outer shape of the preform base 10P by the forming.
（プリフォーム基材の成形）
　まず、シミュレーションによって屈曲基材１０を等分布荷重で平坦にすることで得られた外形のプリフォーム基材１０Ｐを準備する（図４，図５参照）。 (Forming of preform base material)
First, a preform substrate 10P having an outer shape obtained by flattening the bending substrate 10 with a uniform distribution load by simulation is prepared (see FIGS. 4 and 5).
（基材載置工程）
　加熱炉の搬出入ゾーンにおいて、図９（ａ）に示すように、成形装置２０にプリフォーム基材１０Ｐをセットする。具体的には、プリフォーム基材１０Ｐを、搬送機構（図示略）によって成形装置２０の成形型３０の上方から複数のガイド部材５０の内側に載置させる。このとき、平坦なプリフォーム基材１０Ｐは、屈曲基材１０と平面視の外形が同一の成形面３１よりも平面視の外形が大きい。このため、図１０に示すように、プリフォーム基材１０Ｐは、周縁部が成形面３１からはみ出し、成形面３１の周囲に立設されたガイド部材５０の傾斜部５２のガイド部５３に当接されて係止される（図１０中点線参照）。これにより、プリフォーム基材１０Ｐは、その周縁部がガイド部材５０の傾斜部５２に支持され、成形面３１に対して上方へ離間した位置に配置される。なお、成形型３０は、加熱炉で４００℃程度に加熱された状態とされている。 (Base material placement process)
In the loading / unloading zone of the heating furnace, as shown in FIG. 9A, the preform base material 10P is set in the molding apparatus 20. Specifically, the preform base 10P is placed on the inside of the plurality of guide members 50 from above the forming die 30 of the forming apparatus 20 by a transfer mechanism (not shown). At this time, the flat preform base 10P has a larger outer shape in plan view than the molding surface 31 having the same outer shape in plan view as the bending base 10. For this reason, as shown in FIG. 10, the peripheral portion of the preform base material 10P protrudes from the molding surface 31, and contacts the guide portion 53 of the inclined portion 52 of the guide member 50 erected around the molding surface 31. And locked (see dotted line in FIG. 10). Thus, the preform base material 10P is supported at its peripheral edge portion by the inclined portion 52 of the guide member 50, and is disposed at a position spaced upward with respect to the molding surface 31. The mold 30 is heated to about 400 ° C. in a heating furnace.
（成形工程）
　成形型３０は、加熱炉の加熱ゾーンへ移動する。これにより、プリフォーム基材１０Ｐが成形温度に加熱される。 (Molding process)
The mold 30 moves to the heating zone of the furnace. Thereby, preform base material 10P is heated to molding temperature.
　図９（ｂ）に示すように、プリフォーム基材１０Ｐは、成形温度に加熱されることで軟化する。すると、プリフォーム基材１０Ｐは、周縁部がガイド部材５０のガイド部５３と接触していることから、その中央部分が自重によって垂下する。これにより、プリフォーム基材１０Ｐは、その平面視における外形が次第に小さくなり、ガイド部５３に接触している周縁部は、ガイド部５３に接触しながら自重により滑り落ちる。これにより、図９（ｃ）に示すように、プリフォーム基材１０Ｐは、ガイド部５３によって成形面３１に案内されることで、図１０に示すように、成形面３１に位置合わせされつつ成形型３０の成形面３１上に自重で垂下して配置される（図１０中実線参照）。なお、プリフォーム基材１０Ｐの中央部が自重により垂下する際に、プリフォーム基材１０Ｐの上面から少なくとも一部に押圧してもよい。 As shown in FIG. 9B, the preform base 10P is softened by being heated to the molding temperature. Then, since the peripheral portion of the preform base 10P is in contact with the guide portion 53 of the guide member 50, the central portion of the preform base 10P hangs down by its own weight. As a result, the outer shape of the preform base material 10P gradually decreases in plan view, and the peripheral edge in contact with the guide portion 53 slides down by its own weight while contacting the guide portion 53. Thereby, as shown in FIG. 9C, the preform base material 10P is guided to the molding surface 31 by the guide portion 53, and as shown in FIG. 10, is molded while being aligned with the molding surface 31. It is disposed so as to be suspended by its own weight on the molding surface 31 of the mold 30 (see a solid line in FIG. 10). In addition, when the center part of preform base material 10P hangs down by dead weight, you may press at least one part from the upper surface of preform base material 10P.
　この成形工程において、例えば、プリフォーム基材１０Ｐの重心が中央からずれていたり、プリフォーム基材１０Ｐが傾いてセットされると、プリフォーム基材１０Ｐは、重心側や傾きの下方側が先に滑り落ち、一方の端部の縁部がガイド部材５０のストレート部５１に接触する。この場合、その後にプリフォーム基材１０Ｐが軟化して自重による撓みが大きくなると、プリフォーム基材１０Ｐは、ストレート部５１との接触箇所を基点として、中央部分が成形面３１へ近づき、一方の端部以外の縁部がガイド部５３に接触しながら滑り落ち、成形面３１に位置合わせされて成形面３１上に配置される。なお、ガイド部材５０に振動を加えることですべり性を向上しても良い。 In this forming step, for example, when the center of gravity of the preform substrate 10P is shifted from the center or the preform substrate 10P is set in an inclined manner, the preform substrate 10P has the center of gravity side or the lower side of the inclination first. Sliding down, the edge of one end contacts the straight portion 51 of the guide member 50. In this case, when the preform base material 10P is softened thereafter and the deflection due to its own weight becomes large, the center part of the preform base material 10P approaches the molding surface 31 with the contact point with the straight portion 51 as a base point. The edge other than the end slides down while contacting the guide portion 53, and is aligned with the molding surface 31 and disposed on the molding surface 31. The slip property may be improved by applying vibration to the guide member 50.
（吸着工程）
　プリフォーム基材１０Ｐが成形型３０の成形面３１上に配置された状態で真空ポンプが駆動し、成形面３１に形成された吸引孔３２から成形面３１とプリフォーム基材１０Ｐとの間の空気が吸引される。これにより、プリフォーム基材１０Ｐは、成形面３１に高精度に位置決めされた状態で成形面３１に密着され、成形面３１の曲面形状が転写されて所望の湾曲形状の屈曲基材１０とされる。なお、プリフォーム基材１０Ｐは真空ポンプによる吸引で曲面形状を付与するだけでなく、プリフォーム基材１０Ｐの上面から少なくとも一部に押圧してもよく、これらを組み合わせてよい。 (Adsorption process)
The vacuum pump is driven in a state where the preform substrate 10P is disposed on the molding surface 31 of the molding die 30, and the suction hole 32 formed in the molding surface 31 allows the space between the molding surface 31 and the preform substrate 10P. Air is aspirated. Thereby, the preform base material 10P is brought into close contact with the molding surface 31 in a state of being positioned on the molding surface 31 with high accuracy, and the curved surface shape of the molding surface 31 is transferred to be the bent substrate 10 of a desired curved shape. Ru. The preform base material 10P may not only provide a curved surface shape by suction with a vacuum pump, but may press at least a part of the top surface of the preform base material 10P from the top surface, or may combine these.
（徐冷及び取出工程）
　その後、屈曲基材１０が成形面３１に密着された成形型３０は、徐冷ゾーンへ移動され、これにより、屈曲基材１０が歪点以下まで冷却される。そして、冷却された屈曲基材１０は、搬送機構によって成形型３０から取り出される。屈曲基材１０が取り出された成形型３０には、次の屈曲基材１０の成形のためのプリフォーム基材１０Ｐが載置される。 (Slow cooling and removal process)
Thereafter, the mold 30 in which the bending base 10 is in close contact with the molding surface 31 is moved to the annealing zone, whereby the bending base 10 is cooled to the strain point or less. Then, the cooled base material 10 is taken out of the mold 30 by the transport mechanism. A preform base 10P for forming the next bending base 10 is placed on the mold 30 from which the bending base 10 has been taken out.
　ここで、厚みｔが１．８ｍｍのプリフォーム基材１０Ｐを成形装置２０によって成形して屈曲基材１０とするときの成形の具体例を説明する。なお、成形型３０のガイド部５３の静止摩擦係数を０．１とし、成形温度を６３０℃とする。 Here, a specific example of molding when the preform substrate 10P having a thickness t of 1.8 mm is molded by the molding apparatus 20 to form the bent substrate 10 will be described. The coefficient of static friction of the guide portion 53 of the molding die 30 is 0.1, and the molding temperature is 630 ° C.
　図１１の（ａ）から図１３の（ｆ）は、プリフォーム基材１０Ｐを屈曲基材１０に成形する成形の具体例を説明する図である。図１１の（ａ）から（ｆ）は、それぞれ成形工程における成形装置２０の概略斜視図であり、図１２の（ａ）から（ｆ）は、それぞれ成形工程における成形装置２０の概略側面図であり、図１３の（ａ）から（ｆ）は、それぞれ成形工程における成形装置２０の概略平面図である。 (A) of FIG. 11 to (f) of FIG. 13 are views for explaining a specific example of the forming of the preform base 10P into the bending base 10. As shown in FIG. FIGS. 11A to 11F are schematic perspective views of the molding apparatus 20 in the molding process, and FIGS. 12A to 12F are schematic side views of the molding apparatus 20 in the molding process. FIGS. 13 (a) to 13 (f) are schematic plan views of the forming apparatus 20 in the forming process.
　プリフォーム基材１０Ｐを成形型３０にセットした状態（図１１（ａ）、図１２（ａ）及び図１３（ａ）参照）からプリフォーム基材１０Ｐを成形温度（６３０℃）に加熱すると、周縁部がガイド部５３に支持されたプリフォーム基材１０Ｐは、セット時から約１秒後に、中央側が自重で僅かに撓み、平面視における外形が僅かに小さくなる。 When the preform base 10P is heated to the molding temperature (630 ° C.) from the state where the preform base 10P is set in the molding die 30 (see FIGS. 11 (a), 12 (a) and 13 (a)) The preform base material 10P whose peripheral edge portion is supported by the guide portion 53 is slightly bent at its center by its own weight about 1 second after setting, and the outer shape in a plan view becomes slightly smaller.
　すると、プリフォーム基材１０Ｐは、重心側が先に滑り落ち、一方の端部の縁部がガイド部材５０のストレート部５１に接触する（図１１（ｂ）、図１２（ｂ）及び図１３（ｂ）参照）。 Then, the preform base material 10P slips down first on the center of gravity side, and the edge of one end contacts the straight portion 51 of the guide member 50 (FIG. 11 (b), FIG. 12 (b) and FIG. b) see).
　セット時から約３秒後、プリフォーム基材１０Ｐはさらに軟化することで自重による撓みが大きくなり、その中央部分が成形面３１へ近づき（図１１（ｃ）、図１２（ｃ）及び図１３（ｃ）参照）、一方の端部以外の縁部がガイド部５３に接触しながら滑り落ちる。 After about 3 seconds from the set time, the preform base material 10P is further softened to increase the deflection due to its own weight, and the central portion thereof approaches the molding surface 31 (FIG. 11 (c), FIG. 12 (c) and FIG. 13). (See (c)), the edges other than one end slide down while contacting the guide portion 53.
　セット時から約１０秒後、プリフォーム基材１０Ｐは、成形面３１に位置決めされ、その周縁部がガイド部材５０のストレート部５１に接触し、主面１１の外周側が成形面３１に接触する（図１１（ｄ）、図１２（ｄ）及び図１３（ｄ）参照）。 After about 10 seconds from the set time, the preform substrate 10P is positioned on the molding surface 31, and the peripheral edge portion contacts the straight portion 51 of the guide member 50, and the outer peripheral side of the main surface 11 contacts the molding surface 31 ( 11 (d), 12 (d) and 13 (d)).
　セット時から約１１０秒後、プリフォーム基材１０Ｐは、成形面３１に対して中央部分に僅かに隙間をあけ、この中央部分を除く他の部分が密着した状態となる（図１１（ｅ）、図１２（ｅ）及び図１３（ｅ）参照）。 After about 110 seconds from the set time, the preform substrate 10P has a slight gap in the central portion with respect to the molding surface 31, and the other portions except the central portion are in close contact (FIG. 11 (e)) 12 (e) and 13 (e)).
　この状態において、真空ポンプによって０．０８ＭＰａで吸引孔３２から成形面３１とプリフォーム基材１０Ｐとの間の空気を吸引すると、プリフォーム基材１０Ｐの下方側の主面１１の全体が成形面３１に高精度に位置決めされた状態で密着される（図１１（ｆ）、図１２（ｆ）及び図１３（ｆ）参照）。これにより、プリフォーム基材１０Ｐは、成形面３１の曲面形状が転写されて所望の湾曲形状の屈曲基材１０とされる。 In this state, when air between the molding surface 31 and the preform substrate 10P is sucked from the suction hole 32 at 0.08 MPa by the vacuum pump, the entire main surface 11 on the lower side of the preform substrate 10P is the molding surface It is closely attached in a state of being positioned with high accuracy to 31 (see FIGS. 11 (f), 12 (f) and 13 (f)). Thereby, the curved surface shape of the molding surface 31 is transferred to the preform base material 10P, and the preformed base material 10P is made the bending base material 10 having a desired curved shape.
　このように、本実施形態に係る屈曲基材１０の製造方法によれば、プリフォーム基材１０Ｐを垂下させて成形面３１に沿わせることで、少なくとも一部が湾曲した高品質な屈曲基材１０を容易に成形できる。しかも、プリフォーム基材１０Ｐを自重によって屈曲基材１０に成形する際に、ガイド部材５０のガイド部５３によってプリフォーム基材１０Ｐの周縁部を成形面３１の周縁に向かって案内させるので、屈曲基材１０の外形と同一外形を有する成形面３１にプリフォーム基材１０Ｐを精度良く位置決めできる。これにより、成形後に研削して外形を最終外形に仕上げる煩雑な後加工を不要にできる。このように、成形型３０の成形面３１へプリフォーム基材１０Ｐを高精度に位置決めして高品質な屈曲基材１０を容易に成形できる。屈曲基材１０の外形と同一外形を有する成形面３１とは、屈曲基材１０の外形と成形面３１の外形とが完全同一である必要はなく、少なくとも一部が一致していればよく、５０％以上一致するのが好ましく、７０％以上一致するのがより好ましい。 As described above, according to the method of manufacturing the bending base material 10 according to the present embodiment, a high quality bending base material at least a part of which is curved by hanging down the preform base material 10P along the molding surface 31. 10 can be easily molded. Moreover, when forming the preform base material 10P into the bending base material 10 by its own weight, the peripheral portion of the preform base material 10P is guided toward the periphery of the molding surface 31 by the guide portion 53 of the guide member 50. The preform base 10P can be accurately positioned on the molding surface 31 having the same outer shape as the outer shape of the base 10. As a result, it is possible to eliminate the need for complicated post-processing of grinding after molding to finish the outer shape into the final outer shape. As described above, the preform base material 10P can be positioned with high accuracy to the molding surface 31 of the molding die 30, and the high quality bent base material 10 can be easily molded. With the molding surface 31 having the same outer shape as the outer shape of the bending base material 10, the outer shape of the bending base material 10 and the outer shape of the molding surface 31 do not have to be completely identical, and at least a part thereof may be matched. It is preferable to match 50% or more, and more preferably 70% or more.
　特に、プリフォーム基材１０Ｐを湾曲させる方向における成形面３１を挟んだ対向位置に設けたガイド部材５０のガイド部５３によって、自重で垂下するプリフォーム基材１０Ｐの周縁部を成形面３１の周縁に向かって円滑に案内させて成形面３１にプリフォーム基材１０Ｐを精度良く位置決めできる。 In particular, the peripheral edge portion of the preform base material 10P which is suspended by its own weight by the guide portion 53 of the guide member 50 provided at the opposing position across the molding surface 31 in the direction of bending the preform base material 10P. The preform base 10P can be positioned on the molding surface 31 with high accuracy.
　しかも、プリフォーム基材１０Ｐの周縁部の角部１３を予め面取りしておくことで、ガイド部材５０のガイド部５３に対するプリフォーム基材１０Ｐの周縁部の滑りをよくできる。これにより、プリフォーム基材１０Ｐの周縁部をガイド部５３によって円滑に成形面３１の縁部へ案内する。 In addition, by chamfering the corner 13 of the peripheral edge portion of the preform base material 10P in advance, it is possible to improve the slippage of the peripheral edge portion of the preform base material 10P with respect to the guide portion 53 of the guide member 50. Thereby, the peripheral edge portion of the preform base material 10P is smoothly guided to the edge portion of the molding surface 31 by the guide portion 53.
　また、ガイド部材５０のガイド部５３の静止摩擦係数を、成形工程での温度において０．５以下とすることで、ガイド部材５０のガイド部５３に対するプリフォーム基材１０Ｐの周縁部の滑りをよくできる。これにより、プリフォーム基材１０Ｐの周縁部をガイド部５３によって円滑に成形面３１の縁部へ案内する。 Further, by setting the static friction coefficient of the guide portion 53 of the guide member 50 to 0.5 or less at the temperature in the molding process, the slip of the peripheral portion of the preform base 10P with respect to the guide portion 53 of the guide member 50 is good. it can. Thereby, the peripheral edge portion of the preform base material 10P is smoothly guided to the edge portion of the molding surface 31 by the guide portion 53.
　また、プリフォーム基材１０Ｐを、屈曲基材１０を平坦にしたときの外形に形成しておくことで、プリフォーム基材１０Ｐを成形して屈曲基材１０とした際に、成形された屈曲基材１０を正確に目標の外形とできる。 Further, by forming the preform substrate 10P into an outer shape when the bending substrate 10 is made flat, when the preform substrate 10P is formed into the bending substrate 10, the formed bending is performed. The substrate 10 can be precisely shaped to the target.
　さらに、吸着工程によってプリフォーム基材１０Ｐを確実に成形面３１に密着する。これにより、成形精度をさらに高めて品質を向上できる。 Furthermore, the preform substrate 10P is firmly adhered to the molding surface 31 by the adsorption process. As a result, the molding accuracy can be further enhanced to improve the quality.
　また、成形工程において、プリフォーム基材１０Ｐの周縁部の一部は、ガイド部材５０のストレート部５１に係止される。これにより、重心の偏りや載置した際の傾きでプリフォーム基材１０Ｐが斜めに垂下しても、下方側の縁部がストレート部５１に係止され、その後、周縁部の他の部分がガイド部材５０のガイド部５３に案内されて成形面に位置決めされる。これにより、成形面３１へプリフォーム基材１０Ｐを確実に位置決めできる。 Further, in the forming step, a part of the peripheral portion of the preform base 10P is engaged with the straight portion 51 of the guide member 50. Thereby, even if the preform base material 10P hangs down obliquely due to the deviation of the center of gravity or the inclination at the time of mounting, the lower edge is locked to the straight portion 51, and then the other portion of the peripheral edge is It is guided by the guide portion 53 of the guide member 50 and positioned on the molding surface. Thereby, the preform base 10P can be reliably positioned on the molding surface 31.
　また、プリフォーム基材１０Ｐの周縁部をピン状に形成されたガイド部材５０の線状のガイド部５３に点接触させながら成形面３１の縁部へ正確に案内する。 Further, the peripheral edge portion of the preform base material 10P is accurately guided to the edge portion of the molding surface 31 while being in point contact with the linear guide portion 53 of the guide member 50 formed in a pin shape.
　そして、本実施形態に係る屈曲基材１０の製造方法によって製造された屈曲基材１０によれば、少なくとも一部が湾曲され、周縁部における角部１３が面取りされているので、周縁部を研削して面取りすることなく、例えば、ヘッドアップディスプレイのミラーや車載品のカバーガラス等の各種の基材として使用できる。 And according to the bending base material 10 manufactured by the manufacturing method of the bending base material 10 which concerns on this embodiment, since at least one part is curved and the corner part 13 in a peripheral part is chamfered, a peripheral part is ground For example, it can be used as various base materials, such as a mirror of a head-up display, and a cover glass of vehicle-mounted goods, without chamfering.
（他の実施形態）
　次に、他の実施形態について説明する。
　なお、上記実施形態と同一構成部分は、同一符号を付して説明を省略する。 (Other embodiments)
Next, another embodiment will be described.
The same components as those of the above-described embodiment are denoted by the same reference numerals and the description thereof will be omitted.
　図１４は、他の実施形態で用いられる成形装置２０の斜視図である。図１５は、他の実施形態で用いられる成形装置２０の平面図である。図１６は、成形装置２０及びガイド部材７０の斜視図である。 FIG. 14 is a perspective view of a molding apparatus 20 used in another embodiment. FIG. 15 is a plan view of a molding apparatus 20 used in another embodiment. FIG. 16 is a perspective view of the molding device 20 and the guide member 70. As shown in FIG.
　図１４及び図１５に示すように、他の実施形態は、ピン状に形成されたガイド部材５０とともに、ブロック状に形成された一対のガイド部材７０を有する成形型３０を用いて屈曲基材１０を成形する。ガイド部材７０は、互いに対向する位置に配置されている。ガイド部材７０も、ストレート部７１と、傾斜部７２とを有しており、傾斜部７２は、下方へ向かって断面積が次第に大きくなる形状とされている。 As shown in FIGS. 14 and 15, in the other embodiment, a bending base 10 is formed using a mold 30 having a pair of guide members 70 formed in a block shape together with a guide member 50 formed in a pin shape. Molding. The guide members 70 are disposed at mutually opposing positions. The guide member 70 also has a straight portion 71 and a sloped portion 72, and the sloped portion 72 has a shape in which the cross-sectional area gradually increases toward the lower side.
　図１６に示すように、ガイド部材７０は、成形型３０の嵌合凹部３３にストレート部７１が嵌合されて成形型３０に装着された状態で、傾斜部７２における成形面３１側が、面状のガイド部７３とされる。ガイド部材７０のガイド部７３には、プリフォーム基材１０Ｐの周縁部が接触される。ガイド部７３は、成形面３１の外側から成形面３１の縁部へ向かって傾斜されている。このガイド部７３は、幅広形状に形成されており、これにより、ガイド部７３には、プリフォーム基材１０Ｐの周縁部が線接触される。 As shown in FIG. 16, in the state where the straight part 71 is fitted in the fitting recess 33 of the molding die 30 and mounted on the molding die 30, the molding surface 31 side of the inclined part 72 is planar The guide portion 73 of the The peripheral edge portion of the preform base 10P is in contact with the guide portion 73 of the guide member 70. The guide portion 73 is inclined from the outside of the molding surface 31 toward the edge of the molding surface 31. The guide portion 73 is formed in a wide shape, whereby the peripheral portion of the preform base 10P is in line contact with the guide portion 73.
　次に、上記の成形型３０を用いた成形方法について説明する。
　図１７は、成形装置２０を用いた屈曲基材１０の成形方法を説明する図であって、図１７の（ａ）から（ｃ）は、それぞれ成形工程における成形装置２０の斜視図である。 Next, a molding method using the above-described mold 30 will be described.
FIG. 17 is a view for explaining the method for forming the flexible base 10 using the forming apparatus 20, and FIGS. 17 (a) to 17 (c) are perspective views of the forming apparatus 20 in the forming process.
（プリフォーム基材の成形）
　まず、シミュレーションによって屈曲基材１０を等分布荷重で平坦にすることで得られたプリフォーム基材１０Ｐを準備する（図４，図５参照）。 (Forming of preform base material)
First, a preform base 10P obtained by flattening the bending base 10 with uniform distribution load by simulation is prepared (see FIGS. 4 and 5).
（基材載置工程）
　加熱炉の搬出入ゾーンにおいて、図１７（ａ）に示すように、成形装置２０の成形型３０に対して、搬送機構によってプリフォーム基材１０Ｐがセットされる。具体的には、成形型３０の成形面３１の上方から、成形型３０上に立設された複数のガイド部材５０，７０の内側にプリフォーム基材１０Ｐが載置される。このとき、屈曲基材１０に対して平面視の外形が大きい平坦なプリフォーム基材１０Ｐは、その周縁部が成形面３１の周囲に立設されたガイド部材５０，７０の傾斜部５２，７２のガイド部５３，７３に当接されて係止される。 (Base material placement process)
In the loading / unloading zone of the heating furnace, as shown in FIG. 17A, the preform base 10P is set to the forming die 30 of the forming apparatus 20 by the transport mechanism. Specifically, the preform base 10P is placed on the inside of the plurality of guide members 50 and 70 erected on the forming die 30 from above the forming surface 31 of the forming die 30. At this time, the flat preform base 10P having a large outer shape in a plan view with respect to the bending base 10 has inclined portions 52 and 72 of the guide members 50 and 70 whose peripheral edge portion is erected around the molding surface 31. Is abutted against the guide portions 53 and 73 of the
（成形工程）
　成形型３０を加熱炉の加熱ゾーンへ移動させ、プリフォーム基材１０Ｐは成形温度に加熱される。プリフォーム基材１０Ｐは、成形温度に加熱されることで軟化すると、図１７（ｂ）に示すように、周縁部がガイド部材５０，７０のガイド部５３，７３と接触していることから、その中央部分が自重によって垂下する。すると、プリフォーム基材１０Ｐは、その平面視における外形が次第に小さくなり、ガイド部５３，７３に接触している周縁部は、ガイド部５３，７３に接触しながら自重により滑り落ちる。これにより、図１７（ｃ）に示すように、プリフォーム基材１０Ｐは、ガイド部５３，７３によって成形面３１に案内されることで成形面３１に位置合わせされつつ、成形型３０の成形面３１上に自重で垂下して配置される。このとき、ガイド部材７０は、幅広形状に形成されているので、プリフォーム基材１０Ｐは、その両端の縁部がガイド部材７０の面によって構成されるガイド部７３に線接触しながら滑り落ちる。 (Molding process)
The mold 30 is moved to the heating zone of the furnace, and the preform substrate 10P is heated to the molding temperature. When the preform base material 10P is softened by being heated to the molding temperature, as shown in FIG. 17B, the peripheral edge portion is in contact with the guide portions 53 and 73 of the guide members 50 and 70, The central part hangs down by its own weight. Then, the outer shape of the preform base material 10P gradually decreases in plan view, and the peripheral edge in contact with the guide portions 53 and 73 slides down by its own weight while contacting the guide portions 53 and 73. Thereby, as shown in FIG. 17C, the preform base material 10P is guided to the molding surface 31 by the guide portions 53 and 73, thereby being aligned with the molding surface 31, and the molding surface of the molding die 30 It is placed by hanging down on its own weight. At this time, since the guide member 70 is formed in a wide shape, the preform base material 10P slides down while the edges of the both ends thereof are in line contact with the guide portion 73 formed by the surface of the guide member 70.
　この成形工程において、例えば、プリフォーム基材１０Ｐの重心が中央からずれていたり、プリフォーム基材１０Ｐが傾いてセットされると、プリフォーム基材１０Ｐは、重心側や傾きの下方側が先に滑り落ち、一方の端部の縁部がガイド部材７０のストレート部７１に接触する。そして、その後のプリフォーム基材１０Ｐの軟化によって自重による撓みが大きくなると、プリフォーム基材１０Ｐは、ストレート部７１との接触箇所を基点として中央部分が成形面３１へ近づき、一方の端部以外の縁部がガイド部５３，７３に接触しながら滑り落ち、成形面３１に位置合わせされて成形面３１上に配置される。 In this forming step, for example, when the center of gravity of the preform substrate 10P is shifted from the center or the preform substrate 10P is set in an inclined manner, the preform substrate 10P has the center of gravity side or the lower side of the inclination first. Sliding down, the edge of one end contacts the straight portion 71 of the guide member 70. Then, when the deflection due to its own weight increases due to the subsequent softening of the preform base material 10P, the center part of the preform base material 10P approaches the molding surface 31 starting from the contact point with the straight part 71 and other than one end. The edge of the slider slides down while in contact with the guide portions 53 and 73, and is positioned on the molding surface 31 in alignment with the molding surface 31.
（吸着工程）
　プリフォーム基材１０Ｐが成形型３０の成形面３１上に配置された状態で真空ポンプが駆動し、成形面３１に形成された吸引孔３２から成形面３１とプリフォーム基材１０Ｐとの間の空気が吸引される。これにより、プリフォーム基材１０Ｐは、成形面３１に高精度に位置決めされた状態で成形面３１に密着され、成形面３１の曲面形状が転写されて所望の湾曲形状の屈曲基材１０とされる。 (Adsorption process)
The vacuum pump is driven in a state where the preform substrate 10P is disposed on the molding surface 31 of the molding die 30, and the suction hole 32 formed in the molding surface 31 allows the space between the molding surface 31 and the preform substrate 10P. Air is aspirated. Thereby, the preform base material 10P is brought into close contact with the molding surface 31 in a state of being positioned on the molding surface 31 with high accuracy, and the curved surface shape of the molding surface 31 is transferred to be the bent substrate 10 of a desired curved shape. Ru.
（徐冷及び取出工程）
　その後、屈曲基材１０が成形面３１に密着された成形型３０は、徐冷ゾーンへ移動され、これにより、屈曲基材１０が歪点以下まで冷却される。そして、冷却された屈曲基材１０は、搬送機構によって成形型３０から取り出される。屈曲基材１０が取り出された成形型３０には、次の屈曲基材１０の成形のためのプリフォーム基材１０Ｐが載置される。 (Slow cooling and removal process)
Thereafter, the mold 30 in which the bending base 10 is in close contact with the molding surface 31 is moved to the annealing zone, whereby the bending base 10 is cooled to the strain point or less. Then, the cooled base material 10 is taken out of the mold 30 by the transport mechanism. A preform base 10P for forming the next bending base 10 is placed on the mold 30 from which the bending base 10 has been taken out.
　他の実施形態の場合も、プリフォーム基材１０Ｐを自重によって屈曲基材１０に成形する際に、ガイド部材５０，７０のガイド部５３，７３によってプリフォーム基材１０Ｐの周縁部を成形面３１の周縁に向かって案内させるので、屈曲基材１０の外形と同一外形を有する成形面３１にプリフォーム基材１０Ｐを精度良く位置決めできる。これにより、成形後に研削して外形を最終外形に仕上げる煩雑な後加工を不要にできる。このように、他の実施形態は、成形型３０の成形面３１へプリフォーム基材１０Ｐを高精度に位置決めして高品質な屈曲基材１０を容易に成形できる。 Also in the case of the other embodiment, when forming the preform base material 10P into the bending base material 10 by its own weight, the peripheral portion of the preform base material 10P is formed on the molding surface 31 by the guide portions 53, 73 of the guide members 50, 70. The preform base 10P can be accurately positioned on the molding surface 31 having the same outer shape as the outer shape of the bending base 10. As a result, it is possible to eliminate the need for complicated post-processing of grinding after molding to finish the outer shape into the final outer shape. As described above, according to the other embodiment, the preform substrate 10P can be positioned with high accuracy to the molding surface 31 of the mold 30, and the high-quality bent substrate 10 can be easily molded.
　特に、成形型３０は、プリフォーム基材１０Ｐの周縁部をブロック状に形成されたガイド部材７０の面状のガイド部７３に線接触させながら成形面３１の縁部へ正確に案内する。 In particular, the molding die 30 accurately guides the edge portion of the preform base 10P to the edge portion of the molding surface 31 while making line contact with the planar guide portion 73 of the guide member 70 formed in a block shape.
　なお、上記実施形態では、下方へ凹む成形面３１によって湾曲形状の屈曲基材１０を成形する場合を例示したが、上方へ膨出する成形面３１によって湾曲形状の屈曲基材１０を成形してもよく、また、上下に湾曲する成形面３１によって表裏に凹凸状に湾曲する屈曲基材１０を成形してもよい。 In the above embodiment, although the case where the bending base 10 of the curved shape is molded by the molding surface 31 recessed downward is illustrated, the bending base 10 of the curved shape is molded by the molding surface 31 which bulges upward. Alternatively, the base material 10 may be formed so as to be unevenly curved on the front and back sides by the forming surface 31 which is curved up and down.
　また、ガイド部材５０，７０の傾斜部５２，７２のガイド部５３，７３としては、プリフォーム基材１０Ｐの周縁部を成形面３１の縁部へ導くなだらかな形状であればよく、直線状に限らない。ガイド部５３，７３としては、例えば、緩やかに凹む湾曲形状であってもよく、また、緩やかに膨出する湾曲形状であってもよい。 Further, the guide portions 53, 73 of the inclined portions 52, 72 of the guide members 50, 70 may have a gentle shape for guiding the peripheral portion of the preform base material 10P to the edge of the molding surface 31. Not exclusively. The guide portions 53 and 73 may have, for example, a curved shape that gently dents, or may have a curved shape that bulges gently.
　また、成形型３０に立設させるガイド部材としては、プリフォーム基材１０Ｐの縁部を成形面３１の縁部へ導くガイド部を有する形状であれば、円錐形のピン状のガイド部材５０あるいは幅広のブロック状のガイド部材７０に限らず、例えば、三角錐等でもよい。 In addition, as a guide member erected on the forming die 30, if it is a shape having a guide portion for guiding the edge of the preform substrate 10P to the edge of the forming surface 31, a conical pin-shaped guide member 50 or Not limited to the wide block-shaped guide member 70, for example, a triangular pyramid or the like may be used.
　また、上記実施形態では、Ｘ方向及びＹ方向に沿ってそれぞれ湾曲する屈曲基材１０を成形する場合を例示したが、一方向（例えばＹ方向）に沿って湾曲する屈曲基材１０を成形してもよい。この場合、成形型３０としては、湾曲させる方向（Ｙ方向）の端部側だけにガイド部材５０あるいはガイド部材７０を備えたものでもよい。 In the above embodiment, although the case where the bending base material 10 curved along the X direction and the Y direction is formed is illustrated, the bending base material 10 curved along one direction (for example, the Y direction) is formed May be In this case, the mold 30 may be provided with the guide member 50 or the guide member 70 only on the end side in the direction of bending (Y direction).
　また、成形する屈曲基材１０としては、ガラス板に限らず、セラミクス、樹脂、木材、金属等の板であってもよい。 Moreover, as the bending | flexion base material 10 to shape | mold, boards, such as not only a glass plate but ceramics, resin, a wood, a metal, etc. may be sufficient.
　また、本発明の成形装置は、図６に示す実施形態の様に、複数のガイド部材が同一形状を有してもよいし、図１４に示す他の実施形態の様に、複数のガイド部材が異なる形状を有してもよい。
　また、プリフォーム基材は、成形装置にセットした段階で、複数のガイド部材の全てと接触させてもよい。或いは、プリフォーム基材は、成形装置にセットした段階で、複数のガイド部材の一部と接触させ、プリフォーム基材が垂下する段階で、接触する複数のガイド部材の数を増加するようにしてもよい。 Further, in the molding apparatus of the present invention, a plurality of guide members may have the same shape as in the embodiment shown in FIG. 6, and as in the other embodiment shown in FIG. May have different shapes.
In addition, the preform substrate may be brought into contact with all of the plurality of guide members when it is set in the molding apparatus. Alternatively, the preform substrate is brought into contact with a portion of the plurality of guide members when set in the molding apparatus, and the number of the plurality of guide members brought into contact is increased when the preform substrate hangs down. May be
　以上の通り、本明細書には次の事項が開示されている。
（１）　プリフォーム基材を成形型の成形面に沿わせて少なくとも一部が湾曲した屈曲基材に成形する製造方法であって、
　前記成形面の任意の点における鉛直方向のうち、前記プリフォーム基材が成形時に湾曲する方向を下方、反対向きを上方、上面視において前記成形面以外を外側とすると、
　前記屈曲基材の外形と同一外形を有する前記成形面の上方から前記プリフォーム基材を載置させる基材載置工程と、
　前記プリフォーム基材を加熱して軟化させることで、自重によって前記プリフォーム基材を前記成形面に沿わせて前記屈曲基材に成形する成形工程と、を含み、
　前記基材載置工程において、前記成形面の外側から前記成形面の縁部へ向かって傾斜するガイド部を有するガイド部材を備えた成形型に前記プリフォーム基材を載置させ、
　前記成形工程において、前記プリフォーム基材の周縁部を前記ガイド部に接触させて滑らせることで前記プリフォーム基材の周縁部を前記成形面の縁部に向かって案内させる、
　屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、プリフォーム基材を垂下させて成形面に沿わせることで、少なくとも一部が湾曲した高品質な屈曲基材を容易に成形できる。しかも、プリフォーム基材を自重によって屈曲基材に成形する際に、ガイド部材のガイド部によってプリフォーム基材の周縁部を成形面の周縁に向かって案内させるので、屈曲基材の外形と同一外形を有する成形面にプリフォーム基材を精度良く位置決めできる。これにより、成形後に研削して外形を最終外形に仕上げる煩雑な後加工を不要にできる。このように、当該製造方法は、成形型の成形面へプリフォーム基材を高精度に位置決めして高品質な屈曲基材を容易に成形できる。 As described above, the following matters are disclosed in the present specification.
(1) A manufacturing method for forming a preform substrate into a bent substrate at least a part of which is curved along a molding surface of a mold,
In the vertical direction at an arbitrary point of the molding surface, assuming that the direction in which the preform base material curves during molding is downward, the opposite direction is upward, and the top surface view is the outside other than the molding surface,
A substrate placing step of placing the preform substrate from above the molding surface having the same outer shape as the outer shape of the bent substrate;
And forming the preform substrate along the molding surface by its own weight by heating and softening the preform substrate.
In the substrate placing step, the preform substrate is placed on a forming die provided with a guide member having a guide portion which inclines from the outside of the forming surface toward the edge of the forming surface,
In the forming step, the peripheral edge portion of the preform base material is brought into contact with the guide portion and slipped to guide the peripheral edge portion of the preform base material toward the edge portion of the molding surface.
Method of producing a flexible substrate
According to the manufacturing method of this bending base material, it is possible to easily form a high quality bending base material at least a part of which is curved by hanging the preform base material along the molding surface. Moreover, when forming the preform base material into the bending base material by its own weight, the peripheral portion of the preform base material is guided toward the periphery of the forming surface by the guide portion of the guide member, and therefore the same as the outer shape of the bending base material The preform substrate can be accurately positioned on the molding surface having the outer shape. As a result, it is possible to eliminate the need for complicated post-processing of grinding after molding to finish the outer shape into the final outer shape. Thus, the said manufacturing method can position a preform base material with high precision to the molding surface of a shaping | molding die, and can shape | mold a high quality bending base material easily.
（２）　前記ガイド部材を、少なくとも前記成形面を挟んだ対向位置に設ける、（１）に記載の屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、プリフォーム基材を湾曲させる方向における成形面を挟んだ対向位置に設けたガイド部材のガイド部によって、自重で垂下するプリフォーム基材の周縁部を成形面の周縁に向かって円滑に案内させて成形面にプリフォーム基材を精度良く位置決めできる。 (2) The manufacturing method of the bending base material as described in (1) which provides the said guide member in the opposing position which pinched | interposed the said molding surface at least.
According to the manufacturing method of this bending base material, the peripheral portion of the preform base material which hangs down by its own weight is molded by the guide portion of the guide member provided at the opposing position across the molding surface in the direction of bending the preform base material. The preform base material can be accurately positioned on the molding surface while being smoothly guided toward the periphery of the surface.
（３）　前記プリフォーム基材の周縁部における角部を予め面取りしておく、（１）または（２）に記載の屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、プリフォーム基材の周縁部の角部を予め面取りしておくことで、ガイド部材のガイド部に対するプリフォーム基材の周縁部の滑りをよくできる。これにより、プリフォーム基材の周縁部をガイド部によって円滑に成形面の縁部へ案内する。 (3) The manufacturing method of the bending base material as described in (1) or (2) which chamfers the corner | angular part in the peripheral part of the said preform base material previously.
According to the method of manufacturing a bent base, by chamfering the corner of the peripheral part of the preform base in advance, the peripheral part of the preform based on the guide part can slide well. Thus, the peripheral edge of the preform base material is smoothly guided by the guide to the edge of the molding surface.
（４）　前記ガイド部材の前記ガイド部は、前記成形工程での温度における静止摩擦係数が０．５以下である、（１）から（３）のいずれか一つに記載の屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、ガイド部材のガイド部の静止摩擦係数を、成形工程での温度において０．５以下とすることで、ガイド部材のガイド部に対するプリフォーム基材の周縁部の滑りをよくできる。これにより、プリフォーム基材の周縁部をガイド部によって円滑に成形面の縁部へ案内する。 (4) The manufacturing of the bending base according to any one of (1) to (3), wherein the guide portion of the guide member has a static friction coefficient at a temperature in the forming step of 0.5 or less. Method.
According to the manufacturing method of this bent base material, by setting the static friction coefficient of the guide portion of the guide member to 0.5 or less at the temperature in the forming step, the peripheral portion of the preform base material with respect to the guide portion of the guide member I can slide well. Thus, the peripheral edge of the preform base material is smoothly guided by the guide to the edge of the molding surface.
（５）　前記プリフォーム基材を、前記屈曲基材を平坦にしたときの外形に形成しておく、（１）から（４）のいずれか一つに記載の屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、プリフォーム基材を成形して屈曲基材とした際に、成形された屈曲基材を正確に目標の外形とできる。 (5) The manufacturing method of the bending base material as described in any one of (1) to (4) which forms the said preform base material in the external shape when making the said bending base material flat.
According to this manufacturing method of the bending base, when the preform base is formed into the bending base, the formed bending base can be accurately made into the target outer shape.
（６）　前記成形工程において前記プリフォーム基材を前記成形面に沿わせた後に、前記成形面に設けた吸着孔から吸引して前記プリフォーム基材を前記成形面に吸着させる吸着工程を行う、（１）から（５）のいずれか一つに記載の屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、吸着工程によってプリフォーム基材を確実に成形面に密着する。これにより、成形精度をさらに高めて品質を向上できる。 (6) After the preform base material is placed along the molding surface in the molding step, an adsorption step of suctioning the preform base material onto the molding surface by suction from suction holes provided in the molding surface is performed. The manufacturing method of the bending | flexion base material as described in any one of (1) to (5).
According to the manufacturing method of this bending base material, a preform base material is certainly stuck on a molding surface by an adsorption process. As a result, the molding accuracy can be further enhanced to improve the quality.
（７）　前記ガイド部材の根元に、前記プリフォーム基材の縁部が係止可能なストレート部を設ける、（１）から（６）のいずれか一つに記載の屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、成形工程において、プリフォーム基材の周縁部の一部はガイド部材のストレート部に係止される。これにより、重心の偏りや載置した際の傾きでプリフォーム基材が斜めに垂下しても、下方側の縁部がストレート部に係止され、その後、周縁部の他の部分がガイド部材のガイド部に案内されて成形面に位置決めされる。これにより、成形面へプリフォーム基材を確実に位置決めできる。 (7) The method for producing a flexible base according to any one of (1) to (6), wherein a straight portion to which the edge of the preform base can be locked is provided at the root of the guide member.
According to the method of manufacturing a bent base, in the forming step, a part of the peripheral portion of the preform base is locked to the straight portion of the guide member. As a result, even if the preform base member hangs down obliquely due to the deviation of the center of gravity or the inclination at the time of mounting, the lower edge is locked to the straight portion, and then the other portion of the peripheral portion is the guide member It is guided by the guide part of and positioned on the forming surface. Thereby, the preform base can be reliably positioned on the molding surface.
（８）　前記ガイド部材として、下方へ向かって断面積が大きくなるピン状のガイド部材を前記成形型に設け、前記ガイド部材の線状に形成された前記ガイド部に前記プリフォーム基材の周縁部を点接触させる、（１）から（７）のいずれか一つに記載の屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、プリフォーム基材の周縁部をピン状に形成されたガイド部材の線状のガイド部に点接触させながら成形面の縁部へ正確に案内する。 (8) As the guide member, a pin-shaped guide member whose cross-sectional area increases downward is provided in the mold, and the peripheral edge of the preform base material is formed on the guide portion formed in a linear shape of the guide member. The manufacturing method of the bending | flexion base material as described in any one of (1) to (7) which makes a part point contact.
According to the manufacturing method of this bending base material, the peripheral edge portion of the preform base material is accurately guided to the edge portion of the forming surface while making point contact with the linear guide portion of the guide member formed in a pin shape.
（９）　前記ガイド部材として、下方へ向かって断面積が大きくなるブロック状のガイド部材を前記成形型に設け、前記ガイド部材の面状に形成された前記ガイド部に前記プリフォーム基材の周縁部を線接触させる、（１）から（７）のいずれか一つに記載の屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、プリフォーム基材の周縁部をブロック状に形成されたガイド部材の面状のガイド部に線接触させながら成形面の縁部へ正確に案内する。 (9) As the guide member, a block-like guide member whose cross-sectional area increases downward is provided in the molding die, and the peripheral edge of the preform base material in the guide portion formed in a planar shape of the guide member The manufacturing method of the bending | flexion base material as described in any one of (1) to (7) which makes a line contact part.
According to the manufacturing method of this bending base material, the peripheral edge portion of the preform base material is accurately guided to the edge portion of the forming surface while being in line contact with the planar guide portion of the guide member formed in the block shape.
（１０）　前記プリフォーム基材をガラス板によって成形する、（１）から（９）のいずれか一つに記載の屈曲基材の製造方法。
　この屈曲基材の製造方法によれば、プリフォーム基材をガラス板によって成形することで、少なくとも一部が湾曲したガラス板からなる高品質な屈曲基材を容易に成形できる。 (10) The manufacturing method of the bending | flexion base material as described in any one of (1) to (9) which shape | molds the said preform base material with a glass plate.
According to the manufacturing method of this bending base material, the high quality bending base material which consists of a glass plate which at least one part curved can be easily shape | molded by shape | molding a preform base material by a glass plate.
（１１）　プリフォーム基材を成形型の成形面に沿わせて少なくとも一部が湾曲した屈曲基材に成形する成形型であって、
　前記屈曲基材の外形と同一外形を有する前記成形面と、
　前記成形面の外側から前記成形面の縁部へ向かって傾斜するガイド部を有するガイド部材と、
を備え、
　前記ガイド部材は、前記プリフォーム基材の周縁部を前記ガイド部に接触させて滑らせることで、前記プリフォーム基材の周縁部を前記成形面の縁部に向かって案内する、
　屈曲基材の成形型。
　この屈曲基材の成形型によれば、プリフォーム基材を垂下させて成形面に沿わせることで、少なくとも一部が湾曲した高品質な屈曲基材を容易に成形できる。しかも、プリフォーム基材を自重によって屈曲基材に成形する際に、ガイド部材のガイド部によってプリフォーム基材の周縁部を成形面の周縁に向かって案内させるので、屈曲基材の外形と同一外形を有する成形面にプリフォーム基材を精度良く位置決めできる。これにより、成形後に研削して外形を最終外形に仕上げる煩雑な後加工を不要にできる。このように、当該成形型は、成形型の成形面へプリフォーム基材を高精度に位置決めして高品質な屈曲基材を容易に成形できる。 (11) A mold for forming a preform base material into a bent base material at least a part of which is curved along a molding surface of the mold,
The molding surface having the same outer shape as the outer shape of the bent substrate;
A guide member having a guide portion which inclines from the outside of the molding surface toward the edge of the molding surface;
Equipped with
The guide member guides the peripheral edge of the preform base toward the edge of the molding surface by bringing the peripheral edge of the preform base into contact with the guide and sliding it.
Mold of flexible base material.
According to the mold of the bending base, by hanging the preform base along the molding surface, it is possible to easily form a high quality bending base at least a part of which is curved. Moreover, when forming the preform base material into the bending base material by its own weight, the peripheral portion of the preform base material is guided toward the periphery of the forming surface by the guide portion of the guide member, and therefore the same as the outer shape of the bending base material The preform substrate can be accurately positioned on the molding surface having the outer shape. As a result, it is possible to eliminate the need for complicated post-processing of grinding after molding to finish the outer shape into the final outer shape. In this way, the mold can position the preform base on the molding surface of the mold with high accuracy, and can easily mold a high-quality bent base.
（１２）　前記ガイド部は、表面粗さが５０ｎｍ～１０００ｎｍである、（１１）に記載の屈曲基材の成形型。
　この屈曲基材の成形型によれば、プリフォーム基材との接触面がある程度の面強度を保ち、また、プリフォーム基材との真実接触面を減らして摩擦による抵抗力を減らし、プリフォーム基材の局所変形を防ぐことができる。 (12) The mold according to (11), wherein the guide portion has a surface roughness of 50 nm to 1000 nm.
According to the mold of this flexible substrate, the contact surface with the preform substrate maintains a certain level of surface strength, and the true contact surface with the preform substrate is reduced to reduce the resistance by friction, and the preform Local deformation of the substrate can be prevented.
（１３）　前記ガイド部は、傾斜角度が４５°～８９°である、（１１）または（１２）に記載の屈曲基材の成形型。
　この屈曲基材の成形型によれば、成形時のプリフォーム基材とガイド部との垂直応力を減らして摩擦力を減らし、プリフォーム基材の局所変形を抑え、また、プリフォーム基材が最終的にガイド部に乗り上げたままとなって局所変形するのを防ぐことができる。 (13) The mold according to (11) or (12), wherein the guide portion has an inclination angle of 45 ° to 89 °.
According to the mold for the flexible substrate, the vertical stress between the preform substrate and the guide portion during molding is reduced to reduce the frictional force, and the local deformation of the preform substrate is suppressed, and the preform substrate is Ultimately, it is possible to prevent local deformation while riding on the guide portion.
（１４）　前記ガイド部は、前記プリフォーム基材を前記屈曲基材に成形する際の成形温度における静止摩擦係数が０．５以下である、（１１）から（１３）のいずれかに記載の屈曲基材の成形型。
　この屈曲基材の成形型によれば、ガイド部との接触抵抗によるプリフォーム基材の局所変形を抑制することができる。 (14) The guide according to any one of (11) to (13), wherein a static friction coefficient at a forming temperature when forming the preform base material into the bending base is 0.5 or less. Mold of flexible base material.
According to the mold of the bent base, local deformation of the preform base due to the contact resistance with the guide portion can be suppressed.
（１５）　前記ガイド部の静止摩擦係数は０．０１以上０．５以下である、（１４）に記載の屈曲基材の成形型。
　この屈曲基材の成形型によれば、ガイド部との接触抵抗によるプリフォーム基材の局所変形を抑制し、また、プリフォーム基材の初期設置時にプリフォーム基材の位置が極端にずれないようにすることができる。 (15) The mold for a flexible base according to (14), wherein a static friction coefficient of the guide portion is 0.01 or more and 0.5 or less.
According to the mold for the flexible substrate, local deformation of the preform substrate due to contact resistance with the guide portion is suppressed, and the position of the preform substrate is not extremely shifted when the preform substrate is initially installed. You can do so.
　本発明を詳細にまた特定の実施態様を参照して説明したが、本発明の精神と範囲を逸脱することなく様々な変更や修正を加えることができることは当業者にとって明らかである。
　本出願は、２０１７年１１月１０日出願の日本特許出願特願２０１７－２１７１３５に基づくものであり、その内容はここに参照として取り込まれる。 Although the invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
This application is based on Japanese Patent Application No. 2017-217135 filed on Nov. 10, 2017, the contents of which are incorporated herein by reference.
１０　屈曲基材
１０Ｐ　プリフォーム基材
１３　角部
３０　成形型
３１　成形面
３２　吸引孔
５０　ガイド部材
５１　ストレート部
５３　ガイド部
７０　ガイド部材
７１　ストレート部
７３　ガイド部 DESCRIPTION OF SYMBOLS 10 bending base material 10P preform base material 13 corner part 30 shaping | molding die 31 molding surface 32 suction hole 50 guide member 51 straight part 53 guide part 70 guide member 71 straight part 73 guide part

Claims (15)

  1. 　プリフォーム基材を成形型の成形面に沿わせて少なくとも一部が湾曲した屈曲基材に成形する製造方法であって、
    　前記成形面の任意の点における鉛直方向のうち、前記プリフォーム基材が成形時に湾曲する方向を下方、反対向きを上方、上面視において前記成形面以外を外側とすると、
    　前記屈曲基材の外形と同一外形を有する前記成形面の上方から前記プリフォーム基材を載置させる基材載置工程と、
    　前記プリフォーム基材を加熱して軟化させることで、自重によって前記プリフォーム基材を前記成形面に沿わせて前記屈曲基材に成形する成形工程と、を含み、
    　前記基材載置工程において、前記成形面の外側から前記成形面の縁部へ向かって傾斜するガイド部を有するガイド部材を備えた成形型に前記プリフォーム基材を載置させ、
    　前記成形工程において、前記プリフォーム基材の周縁部を前記ガイド部に接触させて滑らせることで前記プリフォーム基材の周縁部を前記成形面の縁部に向かって案内させる、
    　屈曲基材の製造方法。     A manufacturing method for forming a preform substrate along a molding surface of a mold into a bent substrate at least a part of which is curved,
    In the vertical direction at an arbitrary point of the molding surface, assuming that the direction in which the preform base material curves during molding is downward, the opposite direction is upward, and the top surface view is the outside other than the molding surface,
    A substrate placing step of placing the preform substrate from above the molding surface having the same outer shape as the outer shape of the bent substrate;
    And forming the preform substrate along the molding surface by its own weight by heating and softening the preform substrate.
    In the substrate placing step, the preform substrate is placed on a forming die provided with a guide member having a guide portion which inclines from the outside of the forming surface toward the edge of the forming surface,
    In the forming step, the peripheral edge portion of the preform base material is brought into contact with the guide portion and slipped to guide the peripheral edge portion of the preform base material toward the edge portion of the molding surface.
    Method of producing a flexible substrate
  2. 　前記ガイド部材を、少なくとも前記成形面を挟んだ対向位置に設ける、請求項１に記載の屈曲基材の製造方法。 The manufacturing method of the bending | flexion base material of Claim 1 which provides the said guide member in the opposing position which pinched | interposed the at least said molding surface.
  3. 　前記プリフォーム基材の周縁部における角部を予め面取りしておく、請求項１または請求項２に記載の屈曲基材の製造方法。 The manufacturing method of the bending | flexion base material of Claim 1 or 2 which pre-chamfers the corner | angular part in the peripheral part of the said preform base material previously.
  4. 　前記ガイド部材の前記ガイド部は、前記成形工程での温度における静止摩擦係数が０．５以下である、請求項１から３のいずれか一項に記載の屈曲基材の製造方法。 The manufacturing method of the bending | flexion base material as described in any one of Claim 1 to 3 whose static friction coefficient in the temperature in the said formation process of the said guide part of the said guide member is 0.5 or less.
  5. 　前記プリフォーム基材を、前記屈曲基材を平坦にしたときの外形に形成しておく、請求項１から４のいずれか一項に記載の屈曲基材の製造方法。 The manufacturing method of the bending | flexion base material as described in any one of Claim 1 to 4 which forms the said preform base material in the external shape at the time of making the said bending | flexion base material flat.
  6. 　前記成形工程において前記プリフォーム基材を前記成形面に沿わせた後に、前記成形面に設けた吸着孔から吸引して前記プリフォーム基材を前記成形面に吸着させる吸着工程を行う、請求項１から５のいずれか一項に記載の屈曲基材の製造方法。 After the preform base material is placed along the molding surface in the molding step, an adsorption step is performed in which the preform base material is adsorbed to the molding surface by suction from suction holes provided in the molding surface. The manufacturing method of the bending | flexion base material as described in any one of 1-5.
  7. 　前記ガイド部材の根元に、前記プリフォーム基材の縁部が係止可能なストレート部を設ける、請求項１から６のいずれか一項に記載の屈曲基材の製造方法。 The manufacturing method of the bending | flexion base material as described in any one of Claim 1 to 6 which provides the straight part which the edge of the said preform base material can latch at the root of the said guide member.
  8. 　前記ガイド部材として、下方へ向かって断面積が大きくなるピン状のガイド部材を前記成形型に設け、前記ガイド部材の線状に形成された前記ガイド部に前記プリフォーム基材の周縁部を点接触させる、請求項１から７のいずれか一項に記載の屈曲基材の製造方法。 As the guide member, a pin-shaped guide member whose cross-sectional area increases downward is provided in the mold, and the peripheral portion of the preform base material is placed on the guide portion formed in a linear shape of the guide member. The manufacturing method of the bending | flexion base material as described in any one of Claims 1-7 made to contact.
  9. 　前記ガイド部材として、下方へ向かって断面積が大きくなるブロック状のガイド部材を前記成形型に設け、前記ガイド部材の面状に形成された前記ガイド部に前記プリフォーム基材の周縁部を線接触させる、請求項１から７のいずれか一項に記載の屈曲基材の製造方法。 As the guide member, a block-like guide member whose cross-sectional area increases downward is provided in the mold, and the peripheral portion of the preform base is lined with the guide portion formed in a planar shape of the guide member. The manufacturing method of the bending | flexion base material as described in any one of Claims 1-7 made to contact.
  10. 　前記プリフォーム基材をガラス板によって成形する、請求項１から９のいずれか一項に記載の屈曲基材の製造方法。 The manufacturing method of the bending | flexion base material as described in any one of Claims 1-9 which shape | molds the said preform base material by a glass plate.
  11. 　プリフォーム基材を成形型の成形面に沿わせて少なくとも一部が湾曲した屈曲基材に成形する成形型であって、
    　前記屈曲基材の外形と同一外形を有する前記成形面と、
    　前記成形面の外側から前記成形面の縁部へ向かって傾斜するガイド部を有するガイド部材と、
    を備え、
    　前記ガイド部材は、前記プリフォーム基材の周縁部を前記ガイド部に接触させて滑らせることで、前記プリフォーム基材の周縁部を前記成形面の縁部に向かって案内する、
    　屈曲基材の成形型。     A mold for forming a preform substrate along a molding surface of a mold into a bent substrate which is at least partially curved,
    The molding surface having the same outer shape as the outer shape of the bent substrate;
    A guide member having a guide portion which inclines from the outside of the molding surface toward the edge of the molding surface;
    Equipped with
    The guide member guides the peripheral edge of the preform base toward the edge of the molding surface by bringing the peripheral edge of the preform base into contact with the guide and sliding it.
    Mold of flexible base material.
  12. 　前記ガイド部は、表面粗さが５０ｎｍ～１０００ｎｍである、請求項１１に記載の屈曲基材の成形型。 The mold for a flexible base according to claim 11, wherein the guide portion has a surface roughness of 50 nm to 1000 nm.
  13. 　前記ガイド部は、傾斜角度が４５°～８９°である、請求項１１または１２に記載の屈曲基材の成形型。 The mold for a flexible base according to claim 11, wherein the guide portion has an inclination angle of 45 ° to 89 °.
  14. 　前記ガイド部は、前記プリフォーム基材を前記屈曲基材に成形する際の成形温度における静止摩擦係数が０．５以下である、請求項１１から１３のいずれか一項に記載の屈曲基材の成形型。 The bent base according to any one of claims 11 to 13, wherein the guide portion has a coefficient of static friction at a molding temperature when molding the preform base to the bent base, which is 0.5 or less. Mold.
  15. 　前記ガイド部の静止摩擦係数は０．０１以上０．５以下である、請求項１４に記載の屈曲基材の成形型。 The mold for a flexible base according to claim 14, wherein the static friction coefficient of the guide portion is 0.01 or more and 0.5 or less.
PCT/JP2018/041247 2017-11-10 2018-11-06 Curved substrate production method and mold for curved substrate WO2019093341A1 (en)

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