CN103946166A - Electronic device cover glass blank, method for manufacturing same, electronic device cover glass, and method for manufacturing same - Google Patents

Electronic device cover glass blank, method for manufacturing same, electronic device cover glass, and method for manufacturing same Download PDF

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Publication number
CN103946166A
CN103946166A CN201280057050.2A CN201280057050A CN103946166A CN 103946166 A CN103946166 A CN 103946166A CN 201280057050 A CN201280057050 A CN 201280057050A CN 103946166 A CN103946166 A CN 103946166A
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CN
China
Prior art keywords
cover
plate glass
glass blank
major surfaces
pair
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201280057050.2A
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Chinese (zh)
Inventor
桥本和明
矶野英树
村上明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoya Corp
Original Assignee
Hoya Corp
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 Hoya Corp filed Critical Hoya Corp
Publication of CN103946166A publication Critical patent/CN103946166A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C03B11/082—Construction of plunger or mould for making solid articles, e.g. lenses having profiled, patterned or microstructured surfaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/14—Transferring molten glass or gobs to glass blowing or pressing machines
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/02—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing in machines with rotary tables
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/70—Horizontal or inclined press axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Abstract

An electronic device cover glass blank (G) to be used as a substrate of an electronic device cover glass includes a pair of main surfaces (1A, 1B), and end surfaces that adjoin the pair of main surfaces (1A, 1B). The main surfaces are shaped so as to be asymmetric to each other in the thickness direction. The main surfaces (1A, 1B) are press-molded surfaces formed by direct pressing. A method for manufacturing the cover glass blank includes a molding step in which a pair of dies is used for press molding a mass of molten glass supplied from a molten glass supplying unit. The pressing surface of at least one of the pair of dies has a shape for forming the main surfaces and an interposed surface.

Description

Cover-plate glass blank and manufacture method and cover-plate glass and manufacture method thereof for electronics for electronics
Technical field
The present invention relates to comprise and for example become mobile telephone, portable game machine, PDA (Personal Digital Assistant: personal digital assistant), digital camera, pick up camera, Personal Computer) or dull and stereotyped PC (Personal Computer: the cover-plate glass blank (cover glass blank) for portable equipment of the body material of the cover of display frame of portable equipment etc. such as, with cover-plate glass blank and the manufacture method thereof for electronics of cover-plate glass blank for touch sensor of body material that becomes the cover of touch sensor, and electronics cover-plate glass and manufacture method thereof.
Background technology
In the past; in the portable equipments such as mobile telephone, PDA; in order to prevent that display frame is impacted, applies external force; in the outside of display frame, separate certain interval and be equipped with resinous protecting sheet (cap assembly), the protecting sheet (for example patent documentation 1) of the acrylic resin system that for example transparency is higher.
Yet, because the protecting sheet of acrylic resin system is easily because deflection occurs external force, so the interval of protecting sheet and display frame widely need to be set as absorbing the degree of this deflection.Given this, in order to realize the lightening of portable equipment, even if proposed, a kind ofly suppress deflection and used thin plate also to there is the protecting sheet (for example patent documentation 2) of the chemically reinforced glass of intensity.In addition, the protecting sheet of this glass material is compared with acrylic resin board in the past, at aspects such as surface smoothnesss, protectiveness (weathering resistance, didirtresistance), outward appearance/high-quality, also has superiority.
For the portable equipment cover-plate glass of electronics in the past, its outer shape global approximation is smooth shape.But, urgently expect recently for example cap assembly of such portable equipment with three-dimensional shape (3D shape) shown in patent documentation 3.Because the cap assembly of such three-dimensional shape is easily manufactured by the resin materials such as acrylic resin in the past, but be difficult to manufacture by glass material, so as the cap assembly of three-dimensional shape, mainly used the cap assembly of acrylic resin system in the past.
In addition, at general electronics in the past, use in cover-plate glass, the stress concentration in the bight becoming with the end face being present between this pair of major surfaces for fear of opposed a pair of major surfaces improves physical strength, is formed with the fillet surface between above-mentioned a pair of major surfaces and end face.
In the past, the method as forming such fillet surface, had adopted mechanical workout mode, etching and processing method.A kind of method of grinding to form fillet surface by brush is disclosed in patent documentation 4, while disclosing a kind of sharp processing of the cover-plate glass being undertaken by etching in patent documentation 5, adjust the polymerization degree of resist and carry out etching, make end face become the method for regulation shape.
In addition, conventionally utilize print process this cover-plate glass to be formed to the patterns such as words such as the sign of Business Name, name of product, the mark of action button, figure.
Patent documentation 1: TOHKEMY 2004-299199 communique
Patent documentation 2: TOHKEMY 2007-99557 communique
Patent documentation 3: TOHKEMY 2002-6293 communique
Patent documentation 4: TOHKEMY 2010-269389 communique
Patent documentation 5: TOHKEMY 2009-208983 communique
Patent documentation 6: TOHKEMY 2006-27023 communique
In the past, the cap assembly that was difficult to utilize glass material to manufacture the portable equipment of three-dimensional shape is because following reason.
Large stretch of glass raw material plate was cut to small pieces (product size) in the past, then the sheet glass of small pieces is implemented to sharp processing and manufacture the portable equipment cover-plate glass being formed by glass material as described above.Therefore, because raw material plate is the shape of plane, so when thering is the cover-plate glass of three-dimensional shape based on this smooth glass board material manufacture, can consider for example glass board material to be softened the method for moulding (reheat processing, be also referred to as reshaping).
Yet in this method for making, owing to making smooth glass board material local deformaton, so exist the surfaceness of major surfaces inhomogeneous in deformation position and non-deformation position, visual appearance reduces this problem.In addition, for example, the in the situation that of bending machining, due in deformation position, a side major surfaces is stretched, and the opposing party's major surfaces occurs lax, so in any case can not avoid producing deformation in deformation position.In addition, in this method for making, since the sheet material based on smooth is processed, there is restriction in the three-dimensional shape that can form so.That is, the restriction of appearance design large (degree of freedom of appearance design is less).
And think, in order to make sheet material soften moulding, due to raw material plate is cut off to (panelization) afterwards, except sharp processing operation in the past, also need to reheat operation, press-bending operation etc., so production efficiency reduces.
In addition, in the past by the sheet glass of large chip size is being cut to after the glass substrate of product size, then carry out sharp processing and manufacture electronics cover-plate glass.In the disclosed such mechanical workout mode of above-mentioned patent documentation 4, in order to form above-mentioned fillet surface, need the operations such as brush grinding as a ring of sharp processing.In addition, in other mechanical workout modes, in order to form fillet surface, need to use the ground finish of special-purpose revolving wheel, operations such as brush grinding that to remove because of affected layer (microfracture) that ground finish causes the be object ring as sharp processing of usining.Like this, along with the formation of fillet surface, cause the increase of manufacturing process, the increase of manufacturing cost.
In addition, in the disclosed such etching and processing method of above-mentioned patent documentation 5, for the shape of the substrate end-face that makes to comprise above-mentioned fillet surface becomes suitable shape, need to carry out accurately resist for the adjustment of the polymerization degree of board main, it is skilled and very loaded down with trivial details that this adjusts job requirements.In addition, the resist price of using is high, has increased manufacturing cost.
Like this, in the past for the fillet surface of substrate processing end face, there is the problems such as increase that cause the appending of the increase of manufacturing process, loaded down with trivial details operation, manufacturing cost.
In addition, recently urgent expectation replaces print process in the past and by directly cover-plate glass being carved to form the method for the patterns such as word, figure.By to patterns such as cover-plate glass direct engraving word, figures, when watching the display frame of portable equipment from front, can make the patterns such as these words, figure there is the stereoscopic sensation of the degree of depth of existing, can implement the decoration that designability is higher.In addition, in portable game machine etc., user also requires only just can identifying operation button with the sense of touch of finger tip.
A kind of ornament as described below is disclosed in above-mentioned patent documentation 6: possess by the first tabular body whole or that a part is transparent in fact, be formed on the groove of a face of this first tabular body, the first ornamental portion that painted painted portion forms to adding tinting material in this groove; With the one side side engagement of above-mentioned the first tabular body, whole or a part of the second transparent in fact tabular body; With the second ornamental portion of the face with above-mentioned the first tabular body opposition side of this second tabular body having been implemented to decoration, if observe from the another side side of above-mentioned the first tabular body, above-mentioned the first ornamental portion and the second ornamental portion are for example that at least a portion overlaps by visual confirmation.In addition, also recorded the clock that carrys out use using this ornament as cover-plate glass, using this ornament as mobile telephone, the cap assembly of the liquid crystal display part of the electronics such as pager, counter uses.
In recent years, the portable equipment of touch panel mode occupies main flow gradually.In touch panel mode, mainly by pressing the regulation position (such as the icon showing in picture etc.) of display frame, carry out the operation of portable equipment, but owing to repeatedly pressing continually, so require to improve for the intensity of the display frame to should touch panel function, therefore, require slim, light-duty, large picture (big area) and there is the cover-plate glass of sufficient intensity.
For cover-plate glass, in order to improve its intensity, carried out chemical enhanced processing, but one of important factor that hinders cover-plate glass intensity is wound.If surface, end face at cover-plate glass exist wound, it can be grown, even and if become the important factor that weak striking cover plate glass also can destroy.For example, cover-plate glass is being carried out after chemical enhanced processing, implementing, in the situation of the method by patterns such as mechanical workout direct engraving word, figures, easily to produce small wound, crack, the intensity of cover-plate glass can significantly reduce.According to circumstances, also likely when mechanical workout, produce breaking of cover-plate glass.Especially in the situation that the situation of the end engraving character of cover-plate glass, figure etc. or the thickness of slab of cover-plate glass are for example thinned to below 1.5mm, above-mentioned problem easily occurs significantly.
In addition, in above-mentioned patent documentation 6, record an a kind of face at whole or the first tabular body that a part is transparent in fact and formed groove, and add tinting material to carry out the structure of painted the first ornamental portion forming in this groove, but it is prerequisite that the ornament of patent documentation 6 be take the connected structure of above-mentioned the first tabular body and the second tabular body, by above-mentioned the first ornamental portion that the first tabular body is implemented and the second ornamental portion that above-mentioned the second tabular body is implemented overlapping, take on ornamental.Therefore, even the structure applications of such ornament, in the cap assembly of for example mobile telephone, can not thoroughly be solved especially to slim, light-duty, the large picture (big area) that cover-plate glass that the touch panel formula portable equipment as main flow in recent years uses is required and has this problem of sufficient intensity.
In addition, as mentioned above, conventionally the large-sized plate glass that is shaped to sheet being cut off to (panelization) is that the size (product size) of stipulating is made above-mentioned cover-plate glass.Via the cut-out operation comprising to this product size, at interior multiple working procedure, manufacture cover-plate glass.If it is many that operation becomes, also can affect manufacturing cost, in addition, can expect that the generation of the wound that causes because of the carrying of inter process etc. etc. also increases.Therefore, wish to obtain and to shorten as far as possible operation, and at cost, suppress the manufacture method of the cover-plate glass that the aspects such as wound generation are favourable.
Summary of the invention
The present invention completes in order to solve such problem in the past, and its first object is, a kind of cover-plate glass blank and manufacture method thereof for electronics with the three-dimensional shape that is in the past difficult to manufacture is provided.The second object is, provides a kind of degree of freedom that can realize desirable three-dimensional shape, design compared with large and be difficult to produce and follow moulding and cover-plate glass blank and the manufacture method thereof for electronics that deformation, visual appearance are good, can enhance productivity, be particularly suited for a small amount of many variety production occurs.
In addition, the 3rd object is, when a kind of impact briquetting at cover-plate glass blank is provided, by sandwiched faces such as the fillet surfaces of moulding simultaneously together with major surfaces, whole worker ordinal number can be cut down, and cover-plate glass blank and the manufacture method thereof for electronics of manufacturing cost can be reduced.
In addition, the 4th object is, provide a kind of by utilizing impact briquetting to form the major surfaces of cover-plate glass blank and being configured in this major surfaces and for symbol area two sides of the symbol (symbol) that user identified comprise word or figure, whole worker ordinal number can be cut down, and cover-plate glass blank and the manufacture method thereof for electronics of manufacturing cost can be reduced.
In addition, the 5th object is, a kind of cover-plate glass and manufacture method thereof for high-quality electronics of cover-plate glass blank for above-mentioned electronics of having used is provided.
In order to solve above-mentioned problem, the inventor, by further investigation, found that according to the invention with following structure and can solve above-mentioned problem.
That is, the present invention has following structure.
(structure 1)
A kind of portable equipment cover-plate glass blank, it is the portable equipment cover-plate glass blank with a pair of major surfaces and the end face adjacent with this pair of major surfaces, it is characterized in that, above-mentioned a pair of major surfaces is phase asymmetrical shape each other, and above-mentioned a pair of major surfaces is and strikes out profile.
(structure 2)
Portable equipment cover-plate glass blank according to described in structure 1, is characterized in that, forms whole the even surface roughness of above-mentioned major surfaces at above-mentioned cover-plate glass blank.
(structure 3)
Portable equipment cover-plate glass blank according to described in structure 1 or 2, is characterized in that, the alkali metal concentration ratio central part in the top layer of the above-mentioned main surface side of above-mentioned cover-plate glass blank is little.
(structure 4)
Portable equipment cover-plate glass blank according to described in any one in structure 1～3, is characterized in that, at above-mentioned cover-plate glass blank, is formed with compressive stress layers, represents that the curve of distribution of the stress of above-mentioned cover-plate glass blank is parabolic shape.
(structure 5)
According to the portable equipment cover-plate glass blank described in any one in structure 1～4, it is characterized in that, the above-mentioned profile that strikes out is by the piece of the melten glass in aloft mobile, use pair of metal mould in the direction arranged opposite with its travel direction quadrature to catch stamping forming impact molding also and form strike out profile.
(structure 6)
Portable equipment cover-plate glass blank according to described in any one in structure 1～5, is characterized in that, at least one major surfaces in above-mentioned a pair of major surfaces is formed with bend.
(structure 7)
Portable equipment cover-plate glass blank according to described in any one in structure 1～6, is characterized in that, the end of at least one major surfaces in above-mentioned a pair of major surfaces is formed with rake.
(structure 8)
Portable equipment cover-plate glass blank according to described in any one in structure 1～7, is characterized in that, at above-mentioned cover-plate glass blank, is formed with opening, and the inner-wall surface of above-mentioned opening is the above-mentioned profile that strikes out.
(structure 9)
Portable equipment cover-plate glass blank according to described in any one in structure 1～8, is characterized in that, above-mentioned cover-plate glass blank is that the chemical enhanced glass that can carry out based on ion-exchange forms.
(structure 10)
A portable equipment cover-plate glass, is characterized in that, possesses the glass basis material that the portable equipment described in any one obtains with cover-plate glass blank from structure 1～9.
(structure 11)
The manufacture method of cover-plate glass blank for a kind of portable equipment, to there is a pair of major surfaces, with the portable equipment of the end face adjacent with this pair of major surfaces manufacture method with cover-plate glass blank, it is characterized in that, comprise the piece for the melten glass in moving aloft, use the pair of metal mould in the direction arranged opposite with its travel direction quadrature to catch and stamping forming molding procedure, the shape of the stamping surface of above-mentioned pair of metal mould is mutual different shape, so that the above-mentioned a pair of major surfaces of the above-mentioned cover-plate glass blank obtaining by moulding becomes mutual asymmetrical shape.
(structure 12)
Manufacture method according to the portable equipment described in structure 11 with cover-plate glass blank, is characterized in that, the viscosity of above-mentioned melten glass when moulding is 10 5below dPas.
(structure 13)
The manufacture method of cover-plate glass for portable equipment, is characterized in that, uses by the portable equipment described in structure 11 or 12 and manufactures portable equipment cover-plate glass with the cover-plate glass blank that the manufacture method of cover-plate glass blank obtains.
(structure 14)
The manufacture method of cover-plate glass blank for a kind of electronics, this electronics becomes and has opposed a pair of major surfaces with cover-plate glass blank, be present in the end face between this pair of major surfaces, and be configured in the body material of cover-plate glass for the electronics of the sandwiched face between at least some major surfacess and above-mentioned end face in above-mentioned a pair of major surfaces, it is characterized in that, comprise and use pair of metal mould to carry out stamping forming molding procedure to the piece of melten glass, the stamping surface of at least one party's metal die in above-mentioned pair of metal mould has the shape that is used to form above-mentioned major surfaces and above-mentioned sandwiched face both sides.
(structure 15)
Manufacture method according to the electronics described in structure 14 with cover-plate glass blank, it is characterized in that, at least one party's metal die in above-mentioned pair of metal mould is provided with and is used to form the metal die stamping surface of above-mentioned major surfaces and from this metal die stamping surface to the outstanding protuberance that is used to form above-mentioned sandwiched face of pressing direction.
(structure 16)
Manufacture method according to the electronics described in structure 14 or 15 with cover-plate glass blank, is characterized in that, the viscosity of above-mentioned melten glass is 10 5below dPas.
(structure 17)
The manufacture method of cover-plate glass for electronics, is characterized in that, uses by the electronics described in any one in structure 14～16 and manufactures electronics cover-plate glass with the cover-plate glass blank that the manufacture method of cover-plate glass blank obtains.
(structure 18)
An electronics cover-plate glass blank, is characterized in that, has opposed a pair of major surfaces, according to dividing electronics, by the mode of the profile of cover-plate glass, is provided with groove, and the inner-wall surface of above-mentioned a pair of major surfaces and above-mentioned groove is and strikes out profile.
(structure 19)
Electronics cover-plate glass blank according to described in structure 18, is characterized in that, forms whole the even surface roughness of above-mentioned major surfaces at above-mentioned cover-plate glass blank.
(structure 20)
Electronics cover-plate glass blank according to described in structure 18 or 19, is characterized in that, the alkali metal concentration ratio central part in the top layer of the above-mentioned main surface side of above-mentioned cover-plate glass blank is little.
(structure 21)
Electronics cover-plate glass blank according to described in any one in structure 18～20, is characterized in that, at above-mentioned cover-plate glass blank, is formed with compressive stress layers, represents that the curve of distribution of the stress of above-mentioned cover-plate glass blank is parabolic shape.
(structure 22)
According to the electronics cover-plate glass blank described in any one in structure 18～21, it is characterized in that, the above-mentioned profile that strikes out is by the piece of the melten glass in aloft mobile, use pair of metal mould in the direction arranged opposite with its travel direction quadrature to catch stamping forming impact molding also and form strike out profile.
(structure 23)
Electronics cover-plate glass blank according to described in any one in structure 18～22, is characterized in that, at least one party's major surfaces in above-mentioned a pair of major surfaces is formed with bend.
(structure 24)
Electronics cover-plate glass blank according to described in any one in structure 18～23, is characterized in that, the end of at least one party's major surfaces in above-mentioned a pair of major surfaces is formed with rake.
(structure 25)
Electronics cover-plate glass blank according to described in any one in structure 18～24, is characterized in that, at above-mentioned cover-plate glass blank, is formed with opening, and the inner-wall surface of above-mentioned opening is the above-mentioned profile that strikes out.
(structure 26)
Electronics cover-plate glass blank according to described in structure 25, is characterized in that, between the inner-wall surface and above-mentioned a pair of major surfaces of above-mentioned opening, is provided with the sandwiched face that strikes out profile.
(structure 27)
Electronics cover-plate glass blank according to described in any one in structure 18～26, is characterized in that, above-mentioned cover-plate glass blank is that the chemical enhanced glass that can carry out based on ion-exchange forms.
(structure 28)
An electronics cover-plate glass, is characterized in that, possesses the glass basis material that the electronics described in any one obtains with cover-plate glass blank from structure 18～27.
(structure 29)
A kind of electronics cover-plate glass, possesses glass basis material, this glass basis material has opposed a pair of major surfaces, be present in the end face between this pair of major surfaces and be configured at least one party's major surfaces in above-mentioned a pair of major surfaces and the sandwiched face between above-mentioned end face, it is characterized in that, above-mentioned a pair of major surfaces and above-mentioned sandwiched face are and strike out profile.
(structure 30)
The manufacture method of cover-plate glass blank for a kind of electronics, it is characterized in that, this electronics becomes and has opposed a pair of major surfaces with cover-plate glass blank, and the electronics that is present in the end face between this pair of major surfaces body material of cover-plate glass, described manufacture method comprises uses pair of metal mould to carry out stamping forming molding procedure to the piece of melten glass, the stamping surface of at least one party's metal die in above-mentioned pair of metal mould has and is used to form above-mentioned major surfaces, with be configured in the shape of this major surfaces for the symbol area both sides of the symbol that user identified comprise word or figure.
(structure 31)
Manufacture method according to the electronics described in structure 30 with cover-plate glass blank, it is characterized in that, at least one party's metal die in above-mentioned pair of metal mould be provided be used to form above-mentioned major surfaces main stamping surface, from this main stamping surface to pressing direction, give prominence to and be used to form the protuberance of above-mentioned symbol area and from this main stamping surface to anti-pressing direction, cave in and be used to form at least one party of the depressed part of above-mentioned symbol area.
(structure 32)
Manufacture method according to the electronics described in structure 30 or 31 with cover-plate glass blank, it is characterized in that, at least one party's metal die in above-mentioned pair of metal mould is provided with that to be used to form the main stamping surface of above-mentioned major surfaces and surfaceness thicker and be used to form the asperities portion of above-mentioned symbol area than this main stamping surface.
(structure 33)
Manufacture method according to the electronics described in any one in structure 30～32 with cover-plate glass blank, it is characterized in that, at above-mentioned pair of metal mould, be provided with from above-mentioned main stamping surface to pressing direction outstanding and for form the protuberance of opening with cover-plate glass blank at above-mentioned electronics.
(structure 34)
Manufacture method according to the electronics described in any one in structure 30～33 with cover-plate glass blank, it is characterized in that, in above-mentioned molding procedure, for the piece of the melten glass in moving, use the pair of metal mould in the direction arranged opposite with its travel direction quadrature to catch and impact briquetting aloft.
(structure 35)
Manufacture method according to the electronics described in any one in structure 30～34 with cover-plate glass blank, is characterized in that, the viscosity of above-mentioned melten glass is 10 5below dPas.
(structure 36)
The manufacture method of cover-plate glass for electronics, is characterized in that, uses by the electronics described in any one in structure 30～35 and manufactures electronics cover-plate glass with the cover-plate glass blank that the manufacture method of cover-plate glass blank obtains.
(structure 37)
A kind of electronics cover-plate glass blank, it is characterized in that, there is opposed a pair of major surfaces, the symbol area of the symbol that at least one party in above-mentioned a pair of major surfaces is provided for that user is identified and comprises word or figure, above-mentioned a pair of major surfaces and above-mentioned symbol area are and strike out profile.
(structure 38)
Electronics cover-plate glass blank according to described in structure 37, is characterized in that, the alkali metal concentration ratio central part in the top layer of the above-mentioned main surface side of above-mentioned cover-plate glass blank is little.
(structure 39)
According to the electronics cover-plate glass blank described in structure 37 or 38, it is characterized in that, the above-mentioned profile that strikes out is by the piece of the melten glass in aloft mobile, use pair of metal mould in the direction arranged opposite with its travel direction quadrature to catch impact briquetting impact molding also and form strike out profile.
(structure 40)
Electronics cover-plate glass blank according to described in any one in structure 37～39, is characterized in that, at least one party's major surfaces in above-mentioned a pair of major surfaces is formed with bend.
(structure 41)
Electronics cover-plate glass blank according to described in any one in structure 37～40, is characterized in that, the end of at least one party's major surfaces in above-mentioned a pair of major surfaces is formed with rake.
(structure 42)
Electronics cover-plate glass blank according to described in any one in structure 37～41, is characterized in that, at above-mentioned cover-plate glass blank, is formed with opening, and the inner-wall surface of above-mentioned opening is the above-mentioned profile that strikes out.
(structure 43)
Electronics cover-plate glass blank according to described in any one in structure 37～42, is characterized in that, above-mentioned cover-plate glass blank is that the chemical enhanced glass that can carry out based on ion-exchange forms.
(structure 44)
An electronics cover-plate glass, is characterized in that, possesses the glass basis material that the electronics described in any one obtains with cover-plate glass blank from structure 37～43.
According to electronics according to the present invention cover-plate glass blank and manufacture method thereof, can access the electronics cover-plate glass blank with the three-dimensional shape that is in the past difficult to manufacture.In addition, according to cover-plate glass blank and manufacture method thereof for electronics according to the present invention, can access that can to realize the degree of freedom of desirable three-dimensional shape, design large and be difficult to produce the electronics cover-plate glass blank that generation, the visual appearance of the deformation of following moulding is good, can enhance productivity, be particularly suited for a small amount of many variety production.
In addition, according to electronics according to the present invention cover-plate glass blank and manufacture method thereof, when impact briquetting cover-plate glass blank, by sandwiched faces such as the fillet surfaces of moulding simultaneously together with major surfaces, can access and can cut down whole worker ordinal number, and can reduce the electronics cover-plate glass blank of manufacturing cost.
In addition, according to electronics according to the present invention cover-plate glass blank and manufacture method thereof, by utilize impact briquetting to form the major surfaces of cover-plate glass blank and be configured in this major surfaces and for the symbol area both sides of the symbol that user identified comprise word or figure simultaneously, can access and can cut down whole worker ordinal number, and can reduce manufacturing cost electronics cover-plate glass blank.
In addition, according to electronics according to the present invention cover-plate glass and manufacture method thereof, can access and use the high-quality electronics cover-plate glass of cover-plate glass blank for above-mentioned electronics.
Accompanying drawing explanation
Fig. 1 means (a) side-view of an example of the outer shape of cover-plate glass blank and (b) overall perspective view for the portable equipment that the present invention relates to.
Fig. 2 (a)～Fig. 2 (j) means respectively the portable equipment the present invention relates to other routine side-views and the overall perspective view of the outer shape of cover-plate glass blank.
Fig. 3 is the vertical view of the device that uses in impact briquetting.
Fig. 4 means the structure iron of an embodiment of the manufacture method of cover-plate glass blank for the portable equipment that the present invention relates to.
Fig. 5 means the structure iron of the variation of the manufacture method shown in Fig. 4.
Fig. 6 means the structure iron of other variation of the manufacture method shown in Fig. 4.
Fig. 7 means the structure iron of other variation of the manufacture method shown in Fig. 4.
Fig. 8 means (a) overall perspective view of an example of the outer shape of cover-plate glass blank and (b) sectional view for the electronics that the present invention relates to.
Fig. 9 means the electronics the present invention relates to other routine overall perspective view of the outer shape of cover-plate glass blank.
Figure 10 means the structure iron of an embodiment of the manufacture method of cover-plate glass blank for the electronics that the present invention relates to.
Figure 11 means the side-view of an example of the stamping surface shape of the metal die using in impact briquetting.
Figure 12 is the sectional view of the cover-plate glass blank that obtains by impact briquetting.
Figure 13 means the structure iron of the variation of the manufacture method shown in Figure 10.
Figure 14 means (a) overall perspective view of the variation with opening of cover-plate glass blank and (b) sectional view for the electronics that the present invention relates to.
Figure 15 means the electronics the present invention relates to other routine overall perspective view of the variation with opening of cover-plate glass blank.
Figure 16 (a) means the side-view of an example of the stamping surface shape of the metal die using in impact briquetting, (b) means that opening forms the side-view of an example of stamping surface shape of the metal die of use.
Figure 17 is the sectional view of the cover-plate glass blank with opening that obtains by impact briquetting.
Figure 18 means the overall perspective view of an example of electronics related to the present invention.
Figure 19 (a)～(d) means respectively the vertical view of the example of the outer shape of cover-plate glass for the electronics that the present invention relates to.
Figure 20 means the vertical view that has formed the example of the recess that can be identified as word at the major surfaces of cover-plate glass.
Figure 21 (a) and (b) mean respectively the figure of example of the recess that can be identified as figure of the major surfaces that is formed at cover-plate glass.
Figure 22 is the sectional view of cover-plate glass for the electronics that the present invention relates to.
Figure 23 (a) and (b) mean respectively the figure of the preferred profile shape of recess.
Figure 24 means the structure iron of an embodiment of the manufacture method of cover-plate glass blank for the electronics that the present invention relates to.
Figure 25 (a) and (b) mean respectively the side-view of an example of the stamping surface shape of the metal die using in impact briquetting.
Figure 26 is the sectional view of the cover-plate glass blank that obtains by impact briquetting.
Figure 27 means the electronics the present invention relates to overall perspective view of the variation with opening of cover-plate glass blank.
Figure 28 means the electronics the present invention relates to other routine overall perspective view of the variation with opening of cover-plate glass blank.
Figure 29 means that opening forms the side-view of an example of stamping surface shape of the metal die of use.
Figure 30 is the sectional view of the cover-plate glass blank with opening that obtains by impact briquetting.
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described in detail.Wherein, as electronics, with cover-plate glass blank and electronics, use the embodiment of cover-plate glass, enumerate respectively as portable equipment and describe by the situation of cover-plate glass with cover-plate glass blank and portable equipment.
[first embodiment]
The electronics the present invention relates to is for example installed in the display frame of mobile telephone with cover-plate glass with cover-plate glass as portable equipment.More specifically, cover-plate glass has been installed in order to protect display frame, in the surface configuration of mobile telephone, has been had cover-plate glass.
Because above-mentioned cover-plate glass needs protection display frame not because the impact from outside is damaged, so the intensity of being required.Especially the in the situation that of touch panel, by pressing the regulation position (such as being shown in icon of picture etc.) of display frame, carry out the operation of mobile telephone, but owing to repeatedly being pressed continually, so for to should touch panel function and require slim, light-duty, large picture (big area) and there is the cover-plate glass of sufficient intensity.
By being implemented to processing, cover-plate glass blank makes such portable equipment cover-plate glass.The electronics the present invention relates to is characterised in that with cover-plate glass blank, it is the electronics cover-plate glass blank with a pair of major surfaces and the end face adjacent with this pair of major surfaces, above-mentioned a pair of major surfaces is that above-mentioned a pair of major surfaces is the profile that strikes out by being directly stamped to form with respect to thickness direction asymmetrical shape each other mutually.
Fig. 1 means the portable equipment the present invention relates to figure of an embodiment of cover-plate glass blank, and Fig. 1 (a) is side-view, and Fig. 1 (b) is overall perspective view.
As shown in Figure 1, the portable equipment that an embodiment of the invention relate to has a pair of major surfaces 1A, 1B and end face 1C, the 1C adjacent with this pair of major surfaces 1A, 1B with cover-plate glass blank G.And this pair of major surfaces 1A, 1B become asymmetrical shape mutually.Here, the shape that becomes " asymmetric " refers to the approximate centre portion under the overlooking of cover-plate glass blank G, through supposing (along face direction) smooth reference plane of the face direction side of chunk glass between a side major surfaces and the opposing party's major surfaces, a side major surfaces and the opposing party's major surfaces become asymmetrical shape with respect to this reference plane mutually at thickness direction.
In addition, above-mentioned a pair of major surfaces 1A, 1B are and strike out profile.That is, a pair of major surfaces 1A, the 1B of present embodiment are the face of moulding by carry out stamping forming direct impact molding with pair of metal mould.Because a pair of major surfaces of cover-plate glass blank is the profile that strikes out forming by so direct impact molding, so the outer shape of cover-plate glass blank has the desirable three-dimensional shape that is difficult to manufacture (such as 3D shape etc.) in the past.
In the present invention, preferably above-mentioned strike out profile be by for by melten glass supply unit, supplied with and aloft mobile in the piece of melten glass, use pair of metal mould in the direction configuration with its travel direction quadrature to catch and carry out stamping forming impact molding (also referred to as the direct impact molding of level) and form strike out profile.With for example in the past pass through smooth sheet material softened to the cover-plate glass blank that moulding obtains compare, can realize the degree of freedom of design large and there is the cover-plate glass blank of various three-dimensional shapes.In addition, easily the temperature head between pair of metal mould is for example regulated to such an extent that diminish, therefore, can improve the form accuracy (Flatness etc.) of the particularly par of formed cover-plate glass blank.Wherein, the detailed content of the direct impact molding of above-mentioned level is by aftermentioned.
In addition, on the top layer of above-mentioned cover-plate glass blank G, be formed with compressive stress layers.This is by the piece at melten glass during by pair of metal die stamping, from melten glass to metal die heat by conduction, make the top layer side of melten glass than the first cooled and solidified of central side, the central side in melten glass solidifies (be equivalent to cause because of physical strengthening compressive stress layers) of the poor formation of caused contraction than top layer side delayed quench.Wherein, the mode that the curve of the stress distribution of expression cover-plate glass blank G becomes summit according to the thickness direction central part of cover-plate glass blank G bends to parabolic shape.
In addition,, when cover-plate glass blank G is implemented to sharp processing, there is the situation that hinders smooth processing because of the compressive stress layers forming by punching press.Under these circumstances, can implement anneal (slow cooling processing) to the cover-plate glass blank G after punching press, remove the compressive stress layers that is formed at cover-plate glass blank G.
In addition, for above-mentioned cover-plate glass blank G, the alkali metal concentration ratio central part in the top layer of its major surfaces 1A, 1B side is little.This basic metal is the contained basic metal such as Na, K of glass ingredient.Thus, the stripping of the glass ingredient that alkalimetal ion and the ion-exchange between the moisture in atmosphere because of glass ingredient causes can be suppressed, rotten (burn) of glass surface can be suppressed.As a result, can relatively reduce haze value over time.And, due to cover-plate glass blank G is cut off, process the cut surface form and compare with major surfaces, there is more alkalimetal ion, so in the situation that use the end face of cover-plate glass using the cut surface of cover-plate glass blank G as portable equipment, can make portable equipment improve than its major surfaces by the physical strength of the end face of cover-plate glass.
In addition, above-mentioned cover-plate glass blank G forms whole at its major surfaces 1A, 1B, and surfaceness is (in the scope of ± 2.5nm) roughly evenly.Therefore, in the situation that cover-plate glass blank G has bend, can not produce at this bend periphery lax etc. concavo-convexly, visual appearance is good.
In addition, above-mentioned cover-plate glass blank G is formed with the bend 2,2 of through-thickness bending in the both ends side of an one major surfaces 1A.
Fig. 2 means the portable equipment the present invention relates to other routine side-views and the overall perspective view of the outer shape of cover-plate glass blank.In the figure, (a) and (b), (c) and (d), (e) and (f), (g) and (h), (i) and (j) represented respectively side-view and the overall perspective view of identical three-dimensional shape.
For example, in the cover-plate glass blank shown in Fig. 2 (c) and Fig. 2 (d), in the end of an one major surfaces, be formed with the rake tilting with respect to thickness direction.
According to the present invention, can realize in having used the method for making in the past of glass material, be difficult to manufacture, at major surfaces, be formed with the such three-dimensional shape of bend, rake as previously discussed.
In addition, according to the present invention, for origin, in its three-dimensional shape, make its thickness of slab whole inhomogeneous, in thin place, be for example about 0.3mm, in thick place, be the cover-plate glass blank of 1.5mm left and right, also can not damage its physical strength.
Wherein, the outer shape origin of cover-plate glass blank is in the shape, formation etc. that are mounted the portable equipment of cover-plate glass, and the example shown in Fig. 1, Fig. 2 is an example only.In cover-plate glass blank of the present invention, be certainly also not limited to the example shown in Fig. 1, Fig. 2.
In addition, the parts that are formed with opening on the surface of glass such as receiver hole etc. are also contained in the cover-plate glass blank the present invention relates to.In method for making in the past, utilize mechanical workout etc. to offer opening to sheet material, but according to the present invention, for be formed with the cover-plate glass blank of the such shape of opening at cover-plate glass blank, also can utilize impact briquetting to form opening together with outer shape.Therefore, at least a portion of the inner-wall surface of formed opening is the above-mentioned profile that strikes out.
Preferred above-mentioned cover-plate glass blank G is that the chemical enhanced glass that can realize based on ion-exchange forms.As described later, by the glass basis material obtaining from cover-plate glass blank G is carried out to chemical enhanced processing, can form compressive stress layers at its major surfaces.
In the present invention, the glass that preferably forms cover-plate glass blank is amorphous aluminosilicate glass.Its intensity after chemical enhanced of the cover-plate glass blank consisting of alumina silicate glass is like this higher and good.As such alumina silicate glass, can use by containing for example SiO as main component 2be 58～75 % by weight, Al 2o 3be 4～20 % by weight, Li 2o is 0～10 % by weight, Na 2o is the alumina silicate glass that the composition of 4～20 % by weight forms.
Use portable equipment described above can obtain portable equipment cover-plate glass with cover-plate glass blank.
Also can be using above-mentioned cover-plate glass blank G self as portable equipment with the glass basis material of cover-plate glass.Or, also can pass through as required cover-plate glass blank G to implement the processing such as grinding, cut-out, etch processes, for example from cover-plate glass blank G, extract portable equipment out and use cover-plate glass region, or the condition of surface such as mirror-polishing are changed, be used as the glass basis material of cover-plate glass for portable equipment.And, also can, according to portable equipment purposes, to above-mentioned glass basis material major surfaces, the layer that bands more than one deck be set.As banding layer, can enumerate layer that antireflecting coating, anti-dazzle coating, half-reflecting mirror coating, polarization film etc. have optical function, take ITO (Indium Tin Oxide: the nesa coating that tin indium oxide) film is representative etc. has the layer etc. that the layer, printed layers of electric function etc. has the function that improves taste.In addition, by stackedly a plurality ofly banding layer, carrying out patterning processing, can also form to cover-plate glass blank the various devices such as touch panel.The formation method of banding layer as these, can enumerate vapour deposition method, sputtering method etc. and become the print processes such as embrane method, silk screen printing etc.
Next, the manufacture method of cover-plate glass blank described above is described.
The present invention has a pair of major surfaces, with the portable equipment of the end face adjacent with this pair of major surfaces manufacture method with cover-plate glass blank, it is characterized in that, comprise the piece for the melten glass of (in whereabouts) in being supplied with by melten glass supply unit and moving aloft, use the pair of metal mould in the direction configuration with its travel direction quadrature to catch and stamping forming molding procedure, the shape of the stamping surface of above-mentioned pair of metal mould is mutual different shape, so that the above-mentioned a pair of major surfaces of the above-mentioned cover-plate glass blank obtaining by moulding becomes mutual asymmetrical shape.
First with reference to Fig. 3, the impact briquetting operation in the present invention is described.Fig. 3 is the vertical view of the device that uses in impact briquetting operation.As shown in Figure 3, device 10 possesses 4 groups of punching units 20,30,40,50 and cutting unit 60.Cutting unit 60 is arranged on the path of the melten glass flowing out from melten glass spout 11.The piece (being also suitably called below " grumeleuse ") that device 10 allows to be cut off the melten glass that unit 60 cuts off falls, now, by the both sides of the descent path from piece (aerial mobile route), utilize the face clamping of mutual opposed pair of metal mould, catch grumeleuse and carry out punching press, make thus the moulding of cover-plate glass blank.
Specifically as shown in Figure 3, device 10 centered by melten glass spout 11, every 90 degree be provided with 4 groups of punching units 20,30,40 and 50.
Punching unit 20,30,40 and 50 is driven by not shown travel mechanism respectively, can be with respect to melten glass spout 11 advance and retreat.That is, can be arranged in molten glass flow outlet 11 under seizure (catch) position (Fig. 3 is decorated with the position of punching unit 40 with solid line), and from melten glass spout 11 away from retreating position (being decorated with the position of punching unit 20,30 and 50 and the position of being decorated with punching unit 40 with dotted line at Fig. 3 with solid line) between move.
Cutting unit 60 is arranged on the path of the melten glass between catching position (catch position of punching unit to grumeleuse) and melten glass spout 11, cuts in right amount the piece that the melten glass flowing out from melten glass spout 11 forms melten glass.Cutting unit 60 has a pair of cutter blades 61 and 62.Cutter blades 61 and 62 is driven on the path of melten glass, to intersect certain opportunity, when cutter blades 61 and 62 is intersected, cuts melten glass and obtains grumeleuse.Resulting grumeleuse falls towards catching position.
Punching unit 20 has the first metal die 21, the second metal die 22, the first driving part 23 and the second driving part 24.The first metal die 21 and the second metal die 22 are respectively to have for grumeleuse being carried out to the plate-shaped member of stamping forming.The normal direction of these two faces is almost horizontal direction, and these two faces configure in the opposed mode that is parallel to each other.The first driving part 23 makes the first metal die 21 with respect to the second metal die 22 advance and retreat.On the other hand, the second driving part 24 makes the second metal die 22 with respect to the first metal die 21 advance and retreat.The first driving part 23 and the second driving part 24 have such as having combined cylinder or solenoid coil and helical spring mechanism etc. makes the first metal die 21 and the second rapid approaching mechanism of metal die 22.
Wherein, because the structure of punching unit 30,40 and 50 is identical with punching unit 20, so description thereof is omitted.
Punching unit is respectively after moving to catching position, driving based on the first driving part and the second driving part, the grumeleuse of whereabouts is clipped between the first metal die and the second metal die it is carried out to moulding and cooling rapidly, make the cover-plate glass blank G of regulation shape.Next, at punching unit, move to after retreating position, the first metal die is separated with the second metal die, the cover-plate glass blank G after moulding is fallen.Below the retreating position of punching unit 20,30,40 and 50, be provided with the first transfer roller 71, second conveyor 72, the 3rd transfer roller 73 and the 4th transfer roller 74.The first～four transfer roller 71～74 is caught respectively the cover-plate glass blank G falling from each punching unit of correspondence the device that cover-plate glass blank G is carried to not shown subsequent processing.
In device 10, owing to being configured to punching unit 20,30,40 and 50, move to successively catching position, after clamping grumeleuse, move to retreating position, so need not wait for the cooling of cover-plate glass blank G in each punching unit, can carry out continuously the moulding of cover-plate glass blank G.
Fig. 4 (a)～(c) is the figure that has more specifically represented to use the impact briquetting operation of installing 10.Fig. 4 (a) means the figure that makes grumeleuse state in the past, this figure (b) means the figure that has made the state of grumeleuse by cutting unit 60, and this figure (c) means the figure that makes the state after cover-plate glass blank G moulding by grumeleuse being carried out to punching press.
As shown in Fig. 4 (a), from melten glass spout 11, flow out continuously molten glass material Lg.Now, to drive cutting unit 60 opportunity of stipulating, utilize cutter blades 61 and 62 to cut off molten glass material Lg.Thus, as shown in Fig. 4 (b), the melten glass after being cut off is approximate spherical grumeleuse Gg because its surface tension becomes.As long as the adjustment at the discharge hourly of molten glass material Lg and the driving interval of cutting unit 60 is according to definite volume adequacy such as size, thickness of slab etc. by becoming the cover-plate glass blank G of target.In addition, viscosity during molten glass material Lg moulding is also as long as suitably set, but conventionally from viewpoint considerations such as grumeleuse formative, punching formation property, release properties, viscosity during preferred molten glass ware forming is 10 5below dPas.
The grumeleuse Gg making falls towards the first metal die 21 of punching unit 20 and the gap of the second metal die 22.Now, enter the opportunity in the gap of the first metal die 21 and the second metal die 22 at grumeleuse Gg, the first driving part 23 and the second driving part 24 are driven, so that the first metal die 21 and the second metal die 22 are close to each other.Thus, as shown in Fig. 4 (c), grumeleuse Gg is trapped between the first metal die 21 and the second metal die 22.And, the stamping surface 22a of the stamping surface 21a of the first metal die 21 and the second metal die 22 becomes with the approaching state in small interval, is sandwiched in the three-dimensional shape that grumeleuse Gg between the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die 22 is shaped to regulation.Wherein, in order to be certain by the distance maintaining of the stamping surface 22a of the stamping surface 21a of the first metal die 21 now and the second metal die 22, at the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die 22, be respectively arranged with abutting part 21b and 22b.That is,, by these abutting parts 21b and 22b butt, the interval that forms the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die 22 is held certain space.
The stamping surface 22a of the stamping surface 21a of the first metal die 21 and the second metal die 22 shape separately becomes mutual different shapes, so that the above-mentioned a pair of major surfaces of the above-mentioned cover-plate glass blank obtaining by moulding becomes mutual asymmetrical shape.In Fig. 4, as an example, to forming the situation of the cover-plate glass blank G of the three-dimensional shape shown in above-mentioned Fig. 1, represent.
In addition, the first metal die 21 and the second metal die 22 are provided with to thermoregulation mechanism (not shown), and the temperature of the first metal die 21 and the second metal die 22 remains than the abundant low temperature of the glass tansition temperature (Tg) of melten glass Lg.
And, the first metal die 21 and the second metal die 22 are provided with such as radiator element, refrigerant piping etc. for improving grumeleuse at the cooling unit (not shown) of the speed of cooling of stamping grumeleuse Gg.In addition, cooling unit is configured to join with the whole face in the back side that strikes out profile of the first and second metal die 21,22.And preferably cooling unit consists of the parts with the thermal conductivity higher than the first and second metal die 21,22.For example, in the situation that the first and second metal die 21,22 for example, consists of superhard alloy (VM40), cooling unit can consist of copper, copper alloy, aluminium or aluminium alloy etc.Like this, because cooling unit has than the high thermal conductivity of the first and second metal die 21,22, so can discharge to outside efficiently conduct to the first and second metal die 21,22 heat from grumeleuse Gg.
In addition, the thermal conductivity of superhard alloy (VM40) is 71 (W/mK), and the thermal conductivity of copper is 400 (W/mK).Can suitably select to form cooling unit parts according to the thermal conductivity of the metal of formation the first and second metal die 21,22, hardness, gauge etc.In addition, because the first and second metal die 21,22 needs to bear the intensity of punching press, so be not preferably integrally formed with cooling unit.Wherein, because the structure of punching unit 30,40 and 50 is identical with punching unit 20, so description thereof is omitted.
By this cooling unit, can promote the heat exchange of heat from grumeleuse Gg to metal die 21,22, when impact briquetting grumeleuse Gg, in a pair of major surfaces formation compressive stress layers (compressive stress layers being formed by physical strengthening) of chunk glass G.Here, represent that the mode that the curve of the stress distribution of cover-plate glass blank G becomes summit with the thickness direction central part of cover-plate glass blank G bends to parabolic shape.
The temperature head at the opposed locations place of the stamping surface 21a of the first metal die 21 while wherein, grumeleuse Gg being carried out to impact briquetting and the stamping surface 22a of the second metal die 22, and the Flatness of the cover-plate glass blank that obtains after impact briquetting between there is correlationship.That is, the temperature head at the opposed locations place of the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die is less, and the Flatness of the cover-plate glass blank obtaining after impact briquetting is better.This is because in the situation that the temperature between pair of metal mould is more approaching, when sharply cooling because the grumeleuse when high temperature contacts with the stamping surface of metal die, realize thermal equilibrium, so can further suppress the Flatness of the cover-plate glass blank that the difference because of the small thermal distortion degree between the pair of metal mould of cooling stages produces, reduce.
Given this, by obtaining in advance this correlationship, can know for realizing the maximum value of the temperature head between the pair of metal mould of desirable Flatness.Therefore,, by the temperature head between pair of metal mould is controlled to it below maximum value, can realize desirable Flatness.In the present invention, can form the cover-plate glass blank with desirable three-dimensional shape, but be the shape with par, and to require the Flatness of this par be in the situation below prescribed value, the control of the temperature head between above-mentioned pair of metal mould is effective.
In addition, in device 10, from the stamping surface 21a of grumeleuse Gg and the first metal die 21 or the stamping surface 22a of the second metal die 22, touching the first metal die 21 and the second metal die 22, to become the time compole of the state that grumeleuse Gg is kept in detention completely short.Therefore, grumeleuse Gg the utmost point in the short period of time along the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die 22 expansion and moulding, and then sharply cooling and be cured as the glass of amorphous.Make thus cover-plate glass blank G.
In addition, in the Punch-shaping method of present embodiment, owing to there being the mode of the shape of the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die 22 to form cover-plate glass blank G with transfer printing, so preferably the smoothness of the stamping surface of pair of metal mould is equal with the smoothness of cover-plate glass blank as target.In this situation, can save after impact briquetting the surface working operations such as grinding for cover-plate glass blank G.Therefore, in the present invention, can make the cover-plate glass blank G of moulding become the thickness of slab identical with the target thickness of slab of the cover-plate glass finally obtaining.
After the first metal die 21 and the second metal die 22 closures as described above, punching unit 20 promptly moves to retreating position, replaces, and other punching unit 30 moves to catching position, by this punching unit 30, carries out the impact briquetting of grumeleuse Gg.
Wherein, in the above-described embodiment, by the melten glass of outflow being cut off to form approximate spherical grumeleuse by cutter blades 61 and 62.But, approximate spherical if the viscosity of molten glass material Lg only with respect to the small volume of the grumeleuse of wanting to cut, exists by molten glass material is cut off cut glass can not become, be difficult to form the situation of approximate spherical grumeleuse.
In this situation, can apply the method for employing grumeleuse forming mould 80 as shown in Figure 5.
; as shown in Fig. 5 (a); path due to the molten glass material Lg flowing out from glass flows outlet 11, module 81,82 is closed, so the path of melten glass gets clogged, the recess 80c that utilization is formed by module 81,82 catches the piece of the melten glass Lg that is cut off unit 60 cut-outs.Then, as shown in Fig. 5 (b), by module 81,82 separation, the grumeleuse Gg in recess 80c falls towards punching unit 20.When this falls, grumeleuse Gg is because the surface tension of melten glass becomes roughly spherical.As shown in Fig. 5 (c), roughly spherical grumeleuse Gg is clamped and the moulding that is stamped by the first metal die 21 and the second metal die 22, makes cover-plate glass blank G.
Or, can not use above-mentioned cutting unit 60 as shown in Figure 6 yet, and make above-mentioned grumeleuse forming mould 80 travel mechanism that upstream side or downstream side direction move along the path of molten glass material Lg.
As shown in Fig. 6 (a), the recess 80c being formed by module 81,82 catches the molten glass material Lg flowing out from spout 11, as shown in Fig. 6 (b), to make the opportunity of stipulating module 81,82 move to the mobile downstream side of melten glass rapidly.Thus, melten glass Lg is cut off.Then, on the opportunity of regulation, as shown in Fig. 6 (c), by module 81,82 separation, the grumeleuse Gg in recess 80c falls towards punching unit 20.When this falls, grumeleuse Gg is because the surface tension of melten glass becomes roughly spherical.As shown in Fig. 6 (d), roughly spherical grumeleuse Gg is clamped and the moulding that is stamped by the first metal die 21 and the second metal die 22, makes cover-plate glass blank G.
In addition, in the situation that having used above-mentioned cutting unit 60, sometimes due to cut-out meeting residual cut-out trace on resulting cover-plate glass blank G of cutter blades 61,62.In order not produce such cut-out trace, for example, can apply method as shown in Figure 7.
That is, in the upper end of the first metal die 21 and the second metal die 22, be provided be driven into can along continuous straight runs the cutter blades 65 of advance and retreat, cut off state melting to overflow from punching unit 20 or softening glass.Fig. 7 (a), Fig. 7 (b) are identical with above-mentioned Fig. 4 (a), Fig. 4 (b).
Then, on the opportunity that the part that at least comprising cut-out trace T in formed grumeleuse Gg is overflowed, by the first driving part 23 and the second driving part 24, drive the first metal die 21 and the second metal dies 22.Thus, as shown in Fig. 7 (c), between the first metal die 21 and the second metal die 22, capture and cut off the part of trace T and carry out impact briquetting not comprising in grumeleuse Gg, the part that comprises cut-out trace T becomes the state overflowing from the upper end of punching unit 20.Next, as shown in Fig. 7 (d), cutter blades 65 is removed the melting of overflowing from punching unit 20 or softening glass, makes cover-plate glass blank G.
Also can be using the cover-plate glass blank G self obtaining as described above as portable equipment with the glass basis material of cover-plate glass.Or, also can be by as required cover-plate glass blank G being implemented the processing such as grinding, cut-out, etch processes, for example from cover-plate glass blank G, extract portable equipment out and use cover-plate glass region, or the condition of surface such as mirror-polishing are changed, make the glass basis material of cover-plate glass for portable equipment.
In addition, at portable equipment, with in the glass basis material of cover-plate glass, in order to improve intensity, preferably carry out chemical enhanced processing.As the method for chemical enhanced processing, for example preferably do not surpassing the temperature province of the temperature of glass transition point, such as the temperature below spending with 300 degree above 500 Celsius, carry out the low temperature modification ion exchange method of ion-exchange etc.Chemical enhanced processing is by the chemical enhanced salt of melting is contacted with glass basis material, to the alkali metal of atomic radius relatively large in chemical enhanced salt, with glass basis material in the alkali metal of relatively little atomic radius carry out ion-exchange, the alkali metal that this ionic radius is larger is soaked in the top layer of glass basis material, on the surface of glass basis material, produce the processing of stress under compression.
As chemical enhanced salt, can preferably use the alkali-metal nitrate such as saltpetre, SODIUMNITRATE.By the glass basis material after chemical enhanced processing due to intensity improve and shock-resistance superior, so be applicable to applying impact, press and cover-plate glass that the portable equipment of needs higher-strength uses.
Here, in the situation that the compressive stress layers causing because of punching press is formed on glass basis material, because the stress under compression of the compressive stress layers that punching press is caused adds the stress under compression being caused by chemical enhanced, so can further improve the physical strength of glass basis material.Wherein, in chemical enhanced method, the degree of depth of the compressive stress layers that the Thickness Ratio of formed compressive stress layers forms by above-mentioned impact forming method is little.For example, the degree of depth of the compressive stress layers forming by above-mentioned impact forming method is because of thickness of slab, the thermal expansivity difference of glass basis material, be about 100～300 μ m, in contrast, the degree of depth of the compressive stress layers forming by chemical enhanced method is about 10～100 μ m.
In addition, the size of the stress under compression for example producing in the compressive stress layers forming by above-mentioned impact forming method is different because of thickness of slab, the thermal expansivity of glass basis material, is about 0.5～10kg/mm 2.On the other hand, the stress under compression producing in the compressive stress layers that forms by chemical enhanced method can be by the intensified conditions such as temperature, strengthening salt, treatment time are changed, and become, the stress under compression producing with compressive stress layers forming by impact forming method equates or the size more than it.Therefore, compare with only using the situation of chemical enhanced method, by combinatorial chemistry enhancement method and above-mentioned impact forming method, can be formed in the glass basis material that major surfaces has the large and compressive stress layers that stress under compression is larger of thickness.
And, by the portable equipment to after chemical enhanced, with the glass basis material of cover-plate glass, at random form the above-mentioned layer that bands, make final portable equipment cover-plate glass.
As described above, according to cover-plate glass blank and manufacture method thereof for the electronics of present embodiment, can access and there is the electronics cover-plate glass blank that is difficult to the three-dimensional shape of manufacture in the method for making of using glass board material in the past.Particularly according to the present invention, the restriction that can access design is less, can realize desirable three-dimensional shape and be difficult to and produce the deformation of following moulding, and the good cover-plate glass blank of visual appearance such as surfaceness.In addition, according to the manufacture method of present embodiment, can access and can enhance productivity, be particularly suitable for the portable equipment cover-plate glass blank of a small amount of many variety production.
And, by using the above-mentioned electronics cover-plate glass blank obtaining based on the present invention, can access the high-quality electronics cover-plate glass with desirable three-dimensional shape.
[the second embodiment]
The electronics that present embodiment relates to is to have opposed a pair of major surfaces, be present in the end face between this pair of major surfaces and be configured at least one party's major surfaces in above-mentioned a pair of major surfaces and the electronics cover-plate glass blank of the sandwiched face between above-mentioned end face with cover-plate glass blank, it is characterized in that above-mentioned a pair of major surfaces and the above-mentioned sandwiched face profile that strikes out that direct punching press forms of all serving as reasons.
Fig. 8 means the figure of an embodiment of cover-plate glass blank for the electronics of the body material that becomes electronics use cover-plate glass that present embodiment relates to, and this figure (a) is overall perspective view, and this figure (b) is sectional view.
As shown in Figure 8, the electronics that an embodiment of the invention relate to has opposed a pair of major surfaces 1A, 1B, is present in the end face 1D between this pair of major surfaces 1A, 1B and is configured in sandwiched face 1C, the 1C between this pair of major surfaces 1A, 1B and above-mentioned end face 1D with cover-plate glass blank G.
In addition, above-mentioned a pair of major surfaces 1A, 1B and above-mentioned sandwiched face 1C are and strike out profile.That is, a pair of major surfaces 1A, the 1B of present embodiment and sandwiched face 1C are by using pair of metal mould to carry out the profile that strikes out that stamping forming direct impact molding forms.That is, in the present invention, utilize direct impact molding, can with the sandwiched of moulding simultaneously face together with the major surfaces of cover-plate glass blank G.Therefore, without in the past such other operation that is used to form fillet surface etc.In addition, due to major surfaces and the moulding simultaneously of sandwiched face, so can improve the form accuracy of end.In addition, in Fig. 8 (b), represented that above-mentioned sandwiched face 1C is the situation of smooth fillet surface, but the present invention is not limited to this, for example, can be also flexure plane.
In the present embodiment, the preferred above-mentioned profile that strikes out is by the piece of the melten glass for by the supply of melten glass supply unit and in aloft moving, and uses the profile that strikes out that catches also stamping forming impact molding (also referred to as the direct impact molding of level) formation at the pair of metal mould of the direction configuration with its travel direction quadrature.For example with by the cover-plate glass blank that the softening moulding of smooth sheet material is obtained in the past compare, can realize the degree of freedom of design large and there is the cover-plate glass blank of various three-dimensional shapes.In addition, easily the temperature head between pair of metal mould is for example regulated to such an extent that diminish, therefore, can improve the form accuracy (Flatness etc.) of the particularly par of formed cover-plate glass blank.Wherein, the detailed content of the direct impact molding of above-mentioned level is as explanation in first above-mentioned embodiment.
In addition, as described above, the alkali metal concentration ratio central part in the top layer of its major surfaces 1A, 1B side is little for above-mentioned cover-plate glass blank G.This basic metal is the contained basic metal such as Na, K of glass ingredient.Thus, the stripping of the glass ingredient that causes because of the alkalimetal ion of glass ingredient and the ion-exchange of the moisture in atmosphere can be suppressed, rotten (burn) of glass surface can be suppressed.
In addition, above-mentioned cover-plate glass blank G forms whole at its major surfaces 1A, 1B, and surfaceness is (in the scope of ± 2.5nm) almost evenly.Therefore,, in the situation that cover-plate glass blank G has bend, can not produce at its bend periphery lax etc. concavo-convex and become the good parts of visual appearance.
In addition, above-mentioned cover-plate glass blank G is the situation of even shape without being restricted to above-mentioned integral body as shown in Figure 8, can be to be also formed with bend, the such shape of rake at its major surfaces.
Fig. 9 means the electronics the present invention relates to other routine overall perspective view of the outer shape of cover-plate glass blank.In this situation, the both ends of major surfaces have or crooked shape.According to the present invention, except above-mentioned effect, also have and can form above such this effect of various three-dimensional shapes that is formed with bend, rake at major surfaces.
In addition, according to the present invention, for origin in its three-dimensional shape, its thickness of slab whole inhomogeneous but in thin place, be for example about 0.3mm, in thick place, be the cover-plate glass blank of 1.5mm left and right, also can not damage its physical strength.
Wherein, the outer shape of cover-plate glass blank is the shape that comes from the portable equipment that is provided with this cover-plate glass, structure etc., and the example shown in Fig. 8, Fig. 9 is only an example.In cover-plate glass blank of the present invention, certainly neither be defined in the example shown in Fig. 8, Fig. 9.
In addition, the parts of opening that are formed with the Speech input such as the microphone/speaker output use of portable equipment such as the surface at glass are also contained in cover-plate glass blank of the present invention.Figure 14 means (a) overall perspective view of the variation with opening of cover-plate glass blank and (b) sectional view for such electronics.In the example shown in Figure 14, be formed with the opening 3 of slotted hole shape.
In method for making in the past, utilize mechanical workout etc. to offer opening to sheet material, but according to the present invention, for the cover-plate glass blank that is formed with the such shape of opening at cover-plate glass blank, also can, by impact briquetting, form opening together with outer shape.Therefore, at least a portion of the inner-wall surface of formed opening is the above-mentioned profile that strikes out.
In addition, Figure 15 means other routine overall perspective view of the variation with opening of cover-plate glass blank for electronics.In Figure 15, represented to be formed with at the cover-plate glass blank with the both ends inclination of major surfaces or the shape of bending the example of the opening 3 of slotted hole shape same as described above.
Preferred above-mentioned cover-plate glass blank G is that the chemical enhanced glass that can carry out based on ion-exchange forms.As described later, by the glass basis material being obtained by cover-plate glass blank G is carried out to chemical enhanced processing, can form compressive stress layers at its major surfaces.
In the present embodiment, the glass that forms cover-plate glass blank is identical with above-mentioned first embodiment, is preferably amorphous aluminosilicate glass.
Use electronics described above can obtain electronics cover-plate glass with cover-plate glass blank.
Next, the manufacture method of cover-plate glass blank described above is described.
Present embodiment relates to the manufacture method of cover-plate glass blank for electronics, described electronics becomes and has opposed a pair of major surfaces with cover-plate glass blank, be present in the end face between this pair of major surfaces, and be configured in the body material of cover-plate glass for the electronics of the sandwiched face between at least any one party major surfaces and above-mentioned end face in above-mentioned a pair of major surfaces, electronics comprises use pair of metal mould to the stamping forming molding procedure of the piece of the melten glass of being supplied with by melten glass supply unit by the manufacture method of cover-plate glass blank, the stamping surface of at least one party's metal die in above-mentioned pair of metal mould has the shape that is used to form above-mentioned major surfaces and above-mentioned sandwiched face both sides.Especially advantageous applications, for the piece of the melten glass of (in whereabouts) in being supplied with by melten glass supply unit and moving, is used the pair of metal mould in the direction configuration with its travel direction quadrature to catch and stamping forming molding procedure aloft.
First, the impact briquetting operation in present embodiment is described.For the one-piece construction of the decompressor using in impact briquetting operation, due to identical with above-mentioned Fig. 3, so omit repeat specification here.
Figure 10 (a)～(c) is the figure that more specifically represents the impact briquetting operation in present embodiment.Figure 10 (a) means the figure that makes the state before grumeleuse, and this figure (b) means the figure that has made the state of grumeleuse by cutting unit 60, and this figure (c) means by grumeleuse, punching press carrys out the figure of the state after shaping cover sheet glass blank G.
As shown in Figure 10 (a), from melten glass spout 11, flow out continuously molten glass material Lg.Now, to drive cutting unit 60 opportunity of stipulating, utilize cutter blades 61 and 62 to cut off molten glass material Lg.Thus, as shown in Figure 10 (b), the grumeleuse Gg that cut melten glass is spherical because its surface tension becomes roughly.As long as suitably carry out the adjustment at the discharge hourly of molten glass material Lg and the driving interval of cutting unit 60 according to the definite volumes such as size, thickness of slab by becoming the cover-plate glass blank G of target.
The grumeleuse Gg making falls towards the first metal die 21 of punching unit 20 and the gap of the second metal die 22.Now, at grumeleuse Gg, enter the opportunity in the gap of the first metal die 21 and the second metal die 22, drive the first driving part 23 and the second driving part 24, so that the first metal die 21 and the second metal die 22 are close to each other.Thus, as shown in Figure 10 (c), grumeleuse Gg is caught between the first metal die 21 and the second metal die 22.And, the stamping surface 22a of the stamping surface 21a of the first metal die 21 and the second metal die 22 becomes with the approaching state in small interval, is clipped in the three-dimensional shape that grumeleuse Gg between the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die 22 is formed as regulation.Wherein, in order to be certain by the distance maintaining of the stamping surface 22a of the stamping surface 21a of the first metal die 21 now and the second metal die 22, at the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die 22, be respectively arranged with abutting part 21b and 22b.That is,, by these abutting parts 21b and 22b butt, the interval that forms the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die 22 is retained as certain space.
In the present embodiment, the stamping surface of the stamping surface of the first metal die 21 and the second metal die 22 shape separately all has and is used to form the above-mentioned major surfaces of cover-plate glass blank G and above-mentioned sandwiched face both sides' shape.In Figure 10, as an example, in the first metal die 21, be provided with the protuberance 21c, the 21d that are used to form the above-mentioned major surfaces 1A of cover-plate glass blank or metal die stamping surface (main stamping surface) 21a of 1B and from this metal die stamping surface to pressing direction, give prominence to and be used to form above-mentioned sandwiched face 1C.In addition, in the second metal die 22, be provided with too protuberance 22c, the 22d that is used to form the above-mentioned major surfaces 1A of cover-plate glass blank or the metal die stamping surface 22a of 1B and gives prominence to and be used to form above-mentioned sandwiched face 1C from this metal die stamping surface to pressing direction.
Figure 11 means near the sectional view of the shape that the protuberance 21c of above-mentioned the first metal die 21 is.Scarp angulation (acute angle) α of preferable alloy die stamping face 21a and protuberance 21c is the scope of 30 degree～60 degree, more preferably the scope of 45 degree～50 degree.Because the scarp of the protuberance 21c of metal die 21 is the face of shape that determines the above-mentioned sandwiched face of the cover-plate glass blank that obtains by impact briquetting, so less or than 60 degree large in the situation that than 30 degree at above-mentioned α, all can not fully obtain being arranged by the end at cover-plate glass blank the inhibition of the stress concentration that sandwiched face plays.In addition, the scarp shape of protuberance 21c also needs to consider the difficulty or ease of the demoulding after impact briquetting.
In addition, the protuberance 21c of the first metal die 21 is illustrated, but for the protuberance 21d of the first metal die 21, protuberance 22c, the 22d of the second metal die 22, is also preferably identical structure.
Figure 12 is the sectional view of the cover-plate glass blank G that directly obtains by the impact briquetting shown in above-mentioned Figure 10 (c).
As shown in figure 12, cover-plate glass blank G has the opposed a pair of major surfaces that profile 21a, 22a form that strikes out by above-mentioned metal die, and the electronics forming according to protuberance 21c, the 21d, 22c, the 22d that divide by above-mentioned metal die is provided with groove 2 by the mode of the profile of cover-plate glass.The inner-wall surface of these a pair of major surfacess and groove 2 is and strikes out profile.
For the profile of the cover-plate glass blank G formation cover-plate glass for so obtaining, carry out cutting off the post-treatment by the region of outer circumferential side than above-mentioned groove 2 along cutting off line c1, c2.This post-treatment can at random be applied etch processes, mechanical workout etc.By this post-treatment, form the end face 1D of the cover-plate glass blank shown in above-mentioned Fig. 8 (b).
Wherein, in the present invention, the glass basis material (Figure 12) obtaining by above-mentioned impact briquetting or the glass basis material (Fig. 8) obtaining by above-mentioned post-treatment are all called as becomes " the electronics cover-plate glass blank " that electronics is used the body material of cover-plate glass.
In addition, in the situation that manufacture above-mentioned Figure 14, the cover-plate glass blank with opening as shown in Figure 15 by impact briquetting, as shown in figure 16, for example, in the first metal die 21, be provided with the protuberance 21f that is used to form the above-mentioned major surfaces 1A of cover-plate glass blank or the metal die stamping surface 21a of 1B, is used to form protuberance 21c, the 21d of above-mentioned sandwiched face 1C and is used to form above-mentioned opening 3.Figure 16 (a) means near the sectional view of the shape protuberance 21c of above-mentioned the first metal die 21, and Figure 16 (b) means that above-mentioned opening forms the sectional view of an example of stamping surface shape of the metal die of use.In the example shown in Figure 16 (b), the rake 21g that is used to form the sandwiched face arranging between the inner-wall surface of above-mentioned opening 3 and above-mentioned a pair of major surfaces is arranged between metal die stamping surface 21a and above-mentioned protuberance 21f.In this situation, about metal die stamping surface 21a be also preferably the scope of 30 degree～60 degree as scarp angulation (acute angle) α of the outside of rake 21g, be more preferably the scope of 45 degree～50 degree.
In addition, to forming the stamping surface shape of the first metal die 21 in the situation of above-mentioned opening 3, be illustrated, the stamping surface shape for the second metal die 22, is also preferably identical structure.
Figure 17 is by having used the sectional view of the cover-plate glass blank G that the impact briquetting of the metal die of the stamping surface shape shown in above-mentioned Figure 16 obtains.
As shown in figure 17, cover-plate glass blank G is provided with and divides groove 2 and the opening 3 of the profile of cover-plate glass for electronics.The inner-wall surface of these grooves 2 and opening 3 is and strikes out profile.
In order as mentioned above the cover-plate glass blank G obtaining like this to be formed the profile of cover-plate glass, carry out cutting off the post-treatment by the region of outer circumferential side than above-mentioned groove 2 along cutting off line c1, c2.
In addition, in Figure 16, Figure 17, represented also between the inner-wall surface of the above-mentioned opening 3 of cover-plate glass blank G and major surfaces, to form the example of the situation of sandwiched face by above-mentioned impact briquetting, but in the situation that do not form sandwiched face between the inner-wall surface of above-mentioned opening 3 and major surfaces, can between above-mentioned metal die stamping surface 21a and above-mentioned protuberance 21f, above-mentioned rake 21g be set yet.
In addition, the thermoregulation mechanism (not shown) that the first metal die 21 and the second metal die 22 are arranged, for improve grumeleuse at the cooling unit (not shown) of the speed of cooling of stamping grumeleuse Gg as explanation in first above-mentioned embodiment, description thereof is omitted here.
Wherein, in the present embodiment, the temperature head at the opposed locations place of the stamping surface 21a of the first metal die 21 during to grumeleuse Gg impact briquetting and the stamping surface 22a of the second metal die 22, and the Flatness of the cover-plate glass blank that obtains after impact briquetting between also there is correlationship, the temperature head at the opposed locations place of the stamping surface 21a of the first metal die 21 and the stamping surface 22a of the second metal die is less, and the Flatness of the cover-plate glass blank obtaining after impact briquetting is better.
Certainly, according to present embodiment, without the shape processing of the sandwiched faces such as fillet surface that are used to form as shown in patent documentation 4,5 in the past.
In addition, in the Punch-shaping method of present embodiment, owing to having stamping surface 21a, 21c, 21d and stamping surface 22a, the 22c of the second metal die 22 of the first metal die 21 with transfer printing, the form of the shape of 22d forms cover-plate glass blank G, so preferably the smoothness of the stamping surface of pair of metal mould is equal with the smoothness of cover-plate glass blank that becomes target.In this situation, can save after impact briquetting the surface working operations such as grinding for cover-plate glass blank G.Therefore, in the present invention, the cover-plate glass blank G of moulding can become the thickness of slab identical with the target thickness of slab of the cover-plate glass finally obtaining.
After closed the first metal die 21 and the second metal die 22 as described above, punching unit 20 promptly moves to retreating position, replaces, and other punching units 30 move to catching position, by this punching unit 30, carry out the impact briquetting of grumeleuse Gg.
Wherein, small volume in the viscosity of molten glass material Lg with respect to the grumeleuse of wanting to cut, the glass only cutting off by molten glass material is cut off can roughly not become spherical, be difficult to form in the situation of spherical grumeleuse roughly, can apply the method for use grumeleuse forming mould 80 as shown in Figure 13.
; as shown in Figure 13 (a); the path of blocking melten glass by closing module 81,82 path of the molten glass material Lg flowing out from glass flows outlet 11, catches the piece of the melten glass Lg that is cut off unit 60 cut-outs with the recess 80c being formed by module 81,82.Then, as shown in Figure 13 (b), due to module 81,82 separation, the grumeleuse Gg in recess 80c falls towards punching unit 20.When this falls, grumeleuse Gg is because the surface tension of melten glass becomes roughly spherical.As shown in Figure 13 (c), roughly spherical grumeleuse Gg is clamped and the moulding that is stamped by the first metal die 21 and the second metal die 22, makes cover-plate glass blank G.
In addition, also can not use above-mentioned cutting unit 60 and adopt and to make above-mentioned grumeleuse forming mould 80 travel mechanism that upstream side or downstream side direction move along the path of molten glass material Lg.
In addition, in the present embodiment, in raising intensity in the glass basis material (cover-plate glass blank) of cover-plate glass for electronics, also preferably carry out chemical enhanced processing.As the method for chemical enhanced processing, identical with the situation of above-mentioned first embodiment.
As described above, according to cover-plate glass blank and manufacture method thereof for the electronics of present embodiment, can access when the impact briquetting of cover-plate glass blank, by sandwiched faces such as the fillet surfaces of moulding simultaneously together with major surfaces, whole worker ordinal number can be reduced, and the electronics cover-plate glass blank of manufacturing cost can also be reduced.
In addition, according to present embodiment, the restriction that can access design reduces, and is difficult to produce the generation of the deformation of following moulding, and the good cover-plate glass blank of visual appearance such as surfaceness.Particularly, according to the manufacture method of present embodiment, can access and can enhance productivity, be particularly suitable for the electronics cover-plate glass blank of a small amount of many variety production.
And, by using the above-mentioned electronics cover-plate glass blank obtaining by present embodiment, can access the high-quality electronics cover-plate glass that has formed desirable sandwiched face.
[the 3rd embodiment]
The electronics that present embodiment relates to is for example installed in the display frame of mobile telephone with cover-plate glass with cover-plate glass as portable equipment.
Figure 18 means the overall perspective view of an example of portable equipment, as an example of portable equipment, has represented the situation of the main mobile telephone 100 operating in touch panel.This mobile telephone 100 possesses the display frame 102 of housing section 101 and upper surface side, and this display frame 102 is provided with to cover-plate glass.
(a) of Figure 19～(d) mean respectively that present embodiment relates to as electronics with the portable equipment of cover-plate glass the vertical view with the example of the outer shape of cover-plate glass.
(a) of this Figure 19～(d) all represent that the outer shape of cover-plate glass is rectangular-shaped example, Figure 19 (a) has meaned the example of the cover-plate glass 200A of simple rectangle, Figure 19 (b), Figure 19 (c) are illustrated respectively in each bight with the rectangular-shaped cover-plate glass 200B of circularity (radius), the example of 200C, and Figure 19 (d) has represented in each bight with circularity (radius) and cut the example of the rectangular-shaped cover-plate glass 200D after a part.The outer shape of cover-plate glass comes from the shape, structure of the portable equipment that is provided with this cover-plate glass etc., and the example shown in Figure 19 is an example only.In cover-plate glass of the present invention, be certainly also not limited to the example shown in Figure 19.In addition, the parts that are formed with opening on the surface of glass such as receiver hole etc. are also contained in cover-plate glass of the present invention.
The portable equipment that relates in present embodiment is with in cover-plate glass, and the symbol area of the symbol that user is identified comprise word or figure is formed at least one party surface of opposed major surfaces.The symbol area of the symbol that user is identified comprise word or figure is for example the region that can be identified as the symbol that comprises word or figure when can be identified as the symbol that comprises word or figure user or for example touching with finger tip in the front from portable equipment when the front of portable equipment is watched.These words or figure are such as being the sign of Business Name, name of product, the patterns such as mark of action button.The symbol area of the symbol that user is identified comprise this word or figure can form recess (recessed structure) at the major surfaces of cover-plate glass, also can form protuberance (protruding structure).In addition, also can form the structure that makes surfaceness (haze value) localized variation, for example, form surfaceness (larger) region thicker than the major surfaces of cover-plate glass.
Figure 20 means the vertical view that forms the example of the recess that can be identified as word at the major surfaces of cover-plate glass, and Figure 21 (a) and Figure 21 (b) mean respectively the figure at the example of the recess that can be identified as figure of the major surfaces formation of cover-plate glass.
In Figure 20, at the major surfaces of the rear side (back of the body table side in Figure 20) of cover-plate glass 200, be formed with the recess that for example can be identified as the word of " ABC " while watching from front.Be not limited to word, such as also enumerating the such tetragon of Figure 21 (a), the such figures such as trilateral of Figure 21 (b).
By replacing print process in the past to form the symbols such as word, figure as for example recessed structure on cover-plate glass, when watching the display frame of portable equipment from front, can make the symbols such as these words, figure with the stereoscopic sensation that has the degree of depth, can implement the decoration that designability is higher.In addition, for so recessed structure or protruding structure, even without visual confirmation, the only sense of touch when utilizing Fingertip touch, kind that also can identifying operation button (operated key), can to identify be any action button.For example, in portable game, because only seeing picture in game, user sees hardly action button, so be preferably applied to the action button of such portable game.Wherein, in cover-plate glass of the present invention, also comprise the cover-plate glass that the above-mentioned symbol area of formation and effects on surface have been implemented printing.
In addition, Figure 22 is the sectional view with the portable equipment use cover-plate glass of cover-plate glass as electronics that present embodiment relates to.
In the cover-plate glass of the embodiment shown in Figure 22, on major surfaces 201,202 both sides' of the opposed table back of the body of cover-plate glass 200 surface, be formed with respectively the symbol area 5,6 that can be identified as the symbols such as word or figure or can be identified as the symbols such as word or figure when the front of portable equipment is watched when the front of portable equipment touches.In the present embodiment, symbol area 5 forms recessed structure, and symbol area 6 forms protruding structure.Wherein, the symbol area that can be identified as object while mainly contacting with the front from portable equipment is formed on certain one side of the opposed major surfaces 201,202 of cover-plate glass 200 certainly, in other words, is formed on the positive surface while being installed in portable equipment.
In a word, the symbol area forming on the positive cover-plate glass surface of portable equipment can be identified with vision or sense of touch, and the symbol area forming on the surface of the side contrary to the above of cover-plate glass can be identified with vision.
In addition, section shape as the symbol area 5 of above-mentioned recessed structure, more preferably as shown in Figure 23 (a), when from cross-sectional view cover-plate glass 200, the major surface flat portion of this cover-plate glass 200, with the edge part 5b on the border of internal surface (wall) 5a of the symbol area 5 of recessed structure be the shape with circularity (radius).Be application portable equipment of the present invention in the situation that, the finger tip that each action button in touch panel region touches than user is mostly little, and the internal surface 5a that finger tip is not only pressed recess also presses above-mentioned edge part 5b and carrys out applying load.Owing to being the shape with circularity by edge part 5b as mentioned above, can reduce due to the stress concentration of repeatedly pressing edge part 5b and having applied in the situation of load, so can suppress the physical strength of the symbol area 5 of recessed structure, reduce.In addition, by above-mentioned edge part 5b, with circularity, also have and use finger tip repeatedly to press recess 2, the effect that finger tip can pain yet.In addition, also preferably as shown in Figure 23 (b), make the edge part 5b on border of internal surface (wall) 5a of the major surface flat portion of this cover-plate glass 200 and the symbol area 5 of recessed structure become fillet surface shape, there is effect same as described above.
In addition, as shown in figure 23, in the present invention, more preferably when from cross-sectional view cover-plate glass 200, the bottom surface sections of the symbol area 5 of recessed structure is also the shape with circularity with the border of internal surface 5a as wall.And more preferably bottom surface sections integral body is the shape with circularity.In other words, more preferably when from cross-sectional view cover-plate glass 200, on the border of recessed structure itself and recessed structure and above-mentioned major surface flat portion, do not form sharp angle.According to above-mentioned structure, due in the situation that the user of portable equipment 100 can not cause stress concentration by the symbol area 5 of indentation structure, so can further prevent cover-plate glass 200 breakages.
In the structure of the cover-plate glass relating in present embodiment (also identical in cover-plate glass blank), above-mentioned a pair of major surfaces and the above-mentioned symbol area profile that strikes out that direct punching press forms of all serving as reasons.In the cover-plate glass 200 of the embodiment shown in Figure 22, the internal surface 5a of symbol area 5 of its opposed a pair of major surfaces 201,202, recessed structure is, the outside surface 6a of the symbol area 6 of protruding structure is the profile that strikes out forming by direct punching press.
In addition, as mentioned above, in the present invention, symbol area can form the structure that makes surfaceness (haze value) localized variation, for example, form surfaceness (large) region thicker than the major surfaces of cover-plate glass.This haze value is also referred to as degree of haze, is the characteristic value that can measure according to the K7136 of Japanese Industrial Standards (JIS).
Because the surfaceness (haze value) of symbol area is larger than the surfaceness of major surface flat portion (haze value), so that symbol area and major surface flat portion compare dim degree is large, for example, by the easy identification mark of vision region.Therefore, the recess equal with major surfaces blunt end part with for example haze value compared and can be improved visuality.In haze value and the equal recess of major surfaces blunt end part, if do not increase its degree of depth, be not difficult to improve visual, but in the haze value recess larger than major surface flat portion, even if do not increase its degree of depth, can not improve visuality yet.; in the situation that making visual raising; compare with the recess that haze value is equal with major surfaces blunt end part; the recess larger than major surface flat portion due to haze value can reduce its degree of depth; so for example the residue thickness of slab of the forming portion office of the symbol area 5 of recessed structure can not diminish, can fully guarantee the intensity of cover-plate glass.This point is in the situation that need to reduce thickness of slab from the viewpoint of the lightness of cover-plate glass, effective especially.In addition, in the symbol area 6 of protruding structure, because its surfaceness (haze value) is larger than the surfaceness of major surface flat portion (haze value), thus for example lean on also easy identification mark region of vision, and can reduce the height of protuberance.
The haze value of the above-mentioned symbol area preferably determining according to JIS K7136 in the present invention, is more than 10%.If haze value less than 10%, reduces the degree of depth of recess or the height of protuberance and visual raising is difficult to.In addition, if the haze value of above-mentioned symbol area is excessive, exist the symbols such as word or figure too obvious and damage the situation of the designability of portable equipment, therefore preferred above-mentioned haze value is below 70%.
In order to make the haze value of above-mentioned symbol area larger than the haze value of the major surface flat portion of cover-plate glass, it is effective for example, to symbol area (the internal surface 5a of the symbol area 5 of above-mentioned recessed structure is, the outside surface 6a of the symbol area 6 of protruding structure), carrying out roughened.Surperficial roughened by symbol area, haze value outer scattering of light and increasing during based on visual confirmation.In the present invention, above-mentioned symbol area is to strike out profile, as described later, by at least one party's metal die in pair of metal mould, surfaceness to be set than the main stamping surface that is used to form major surfaces thick and be used to form the asperities portion of above-mentioned symbol area, can striking out in profile after roughened complete.
Therefore, the surfaceness of preferred above-mentioned symbol area (Ra) is larger than the surfaceness of major surface flat portion (Ra).Here, the surfaceness of the symbol area surfaceness of the outside surface 6a of the internal surface 5a of the symbol area 5 of above-mentioned recessed structure or the symbol area 6 of protruding structure specifically.
Surfaceness by above-mentioned symbol area is larger than the surfaceness of major surface flat portion, when user uses the display frame of Fingertip touch portable equipment from front, the difference of the feel based on symbol area and major surface flat portion comes the tactile in identification mark region to improve.As mentioned above, due to can be in order to make the visual degree of depth of recess or the height of protuberance that reduces symbol area that improve, so when pressing symbol area with finger tip, except the edge (edge part on the surperficial border of major surfaces blunt end part and recess or protuberance) of recess or protuberance, finger tip is also touched the surface of recess or protuberance.Therefore, in the situation that the degree of depth of the recess of above-mentioned symbol area or the height of protuberance are less, particularly because the surfaceness of symbol area is larger than the effect of large the brought raising tactile of the surfaceness of major surface flat portion.
In the present invention, the surfaceness of preferred above-mentioned symbol area (Ra) is more than 2nm, more than being more preferably 3nm.If the not enough 2nm of the surfaceness of symbol area (Ra), the difference that is difficult to the feel of raising based on symbol area and major surface flat portion is carried out the tactile in identification mark region.In addition, if the surfaceness of symbol area is excessive, owing to having feel, the excessive situation of damaging the appearance design of portable equipment of haze value, so preferably the surfaceness (Ra) of symbol area is below 20nm.
Wherein, above-mentioned surfaceness is the arithmetic average roughness Ra being stipulated by JIS B0601:2001, for example, can utilize atomic force microscope to measure, and calculate by the method for being stipulated by JIS R1683:2007.In the present invention, for example, in the 1 square mensuration region of μ m * 1 μ m, the arithmetic average roughness Ra in the time of can using the resolving power determination with 512 * 128 pixels.
Such electronics possesses and becomes the cover-plate glass of its body material blank with cover-plate glass.The electronics that present embodiment relates to is characterised in that with cover-plate glass blank, there is opposed a pair of major surfaces, at least one party in above-mentioned a pair of major surfaces is provided with the symbol area of the symbol for user being identified comprise word or figure, above-mentioned a pair of major surfaces and the above-mentioned symbol area profile that strikes out that direct punching press forms of all serving as reasons.
The electronics use cover-plate glass blank G that present embodiment relates to and above-mentioned Fig. 8 are same, have opposed a pair of major surfaces 1A, 1B, be present in the end face 1D between this pair of major surfaces 1A, 1B and be configured in sandwiched face 1C, the 1C between this pair of major surfaces 1A, 1B and above-mentioned end face 1D.In addition, as mentioned above, at least one party in above-mentioned a pair of major surfaces is provided with the symbol area of the symbol for user being identified comprise word or figure.
In the cover-plate glass blank of present embodiment, above-mentioned a pair of major surfaces 1A, 1B and above-mentioned sandwiched face 1C and symbol area are by using pair of metal mould to carry out the profile that strikes out of stamping forming direct punching press formation.That is, in the present embodiment, can utilize direct punching press, with the symbol area moulding simultaneously that makes to be configured in this major surfaces together with the major surfaces of cover-plate glass blank G.In addition, Fig. 8 (b) has represented that above-mentioned sandwiched face 1C is the situation of smooth fillet surface, but present embodiment is not limited to this, for example, can be also flexure plane.In addition, also such sandwiched face can be set.
In the present embodiment, preferably the above-mentioned profile that strikes out is the piece by the melten glass to from the supply of melten glass supply unit is also aloft moved, and uses the profile that strikes out that catches also stamping forming impact molding (also referred to as the direct impact molding of level) formation at the pair of metal mould of the direction configuration with its travel direction quadrature.Compare with for example cover-plate glass blank that passes through the softening moulding of smooth sheet material is obtained in the past, can realize the degree of freedom of design large and there is the cover-plate glass blank of various three-dimensional shapes.In addition, easily the temperature head between pair of metal mould is for example regulated to such an extent that diminish, therefore, can improve the form accuracy (Flatness etc.) of the particularly par of formed cover-plate glass blank.Wherein, the detailed content of the direct impact molding of above-mentioned level is as explanation in above-mentioned first embodiment.
In addition, without above-mentioned cover-plate glass blank G is defined as to the situation that integral body is even shape, also can be as shown in Figure 9 described above, be at its major surfaces, to be formed with the shape of bend, rake.
In addition, the parts that the sound such as microphone/speaker that are formed with portable equipment such as the surface at glass enter to export the opening of use are also contained in the cover-plate glass blank that present embodiment relates to.Figure 27 means the overall perspective view of the variation with opening of cover-plate glass blank for such electronics.In the example shown in Figure 27, be formed with the opening 3 of slotted hole shape.
According to present embodiment, for be formed with the cover-plate glass blank of the such shape of opening at cover-plate glass blank, also can form by impact briquetting opening together with outer shape.Therefore, at least a portion of the inner-wall surface of formed opening is the above-mentioned profile that strikes out.
In addition, Figure 28 means other routine overall perspective view of the variation with opening of cover-plate glass blank for electronics.In Figure 28, represented to have at the both ends of major surfaces and tilted or the cover-plate glass blank of crooked shape is formed with the example of the opening 3 of slotted hole shape same as described above.
In the present embodiment, preferred above-mentioned cover-plate glass blank G is that the chemical enhanced glass that can carry out based on ion-exchange forms.By the glass basis material obtaining from cover-plate glass blank G is carried out to chemical enhanced processing, can form compressive stress layers at its major surfaces.The glass that preferably forms cover-plate glass blank is amorphous aluminosilicate glass.The cover-plate glass blank that alumina silicate glass by such is formed, the intensity after chemical enhanced is higher and good.
Use electronics described above can access electronics cover-plate glass with cover-plate glass blank.
Next, the manufacture method of cover-plate glass blank described above is described.
In the present embodiment, relate to the manufacture method of cover-plate glass blank for electronics, this electronics becomes and has opposed a pair of major surfaces with cover-plate glass blank, and the electronics that is present in the end face between this pair of major surfaces body material of cover-plate glass, this manufacture method comprises uses pair of metal mould to carry out stamping forming molding procedure to the piece of the melten glass of being supplied with by melten glass supply unit, the stamping surface of at least one party's metal die in above-mentioned pair of metal mould has and is used to form above-mentioned major surfaces, with for user is identified, be configured in this major surfaces and comprise word or the symbol area both sides' of the symbol of figure shape.
Next, impact briquetting operation is described.Because the one-piece construction of the device using in impact briquetting operation is identical with above-mentioned Fig. 3, so omit repeat specification here.
Figure 24 (a)～(c) is the figure that more specifically represents the impact briquetting operation in present embodiment.Figure 24 (a) means the figure of the former state of making grumeleuse, this figure (b) means the figure that has made the state of grumeleuse by cutting unit 60, and this figure (c) means by grumeleuse being stamped to form to the figure of the state of type cover-plate glass blank G.
As shown in Figure 24 (a), from melten glass spout 11, flow out continuously molten glass material Lg.Now, to drive cutting unit 60 opportunity of stipulating, by cutter blades 61 and 62, cut off molten glass material Lg.Thus, as shown in Figure 24 (b), the grumeleuse Gg that cut melten glass is spherical because its surface tension becomes roughly.The adjustment at the discharge hourly of molten glass material Lg and the driving interval of cutting unit 60 as mentioned above, as long as according to definite volume adequacy such as size, thickness of slab etc. by becoming the cover-plate glass blank G of target.In addition, also can suitably set the viscosity of molten glass material Lg when moulding.
The grumeleuse Gg making falls towards the first metal die 21 of punching unit 20 and the gap of the second metal die 22.Now, at grumeleuse Gg, enter the opportunity in the gap of the first metal die 21 and the second metal die 22, drive the first driving part 23 and the second driving part 24, so that the first metal die 21 and the second metal die 22 are close to each other.Thus, as shown in Figure 24 (c), grumeleuse Gg is trapped between the first metal die 21 and the second metal die 22.And, the stamping surface of the stamping surface of the first metal die 21 and the second metal die 22 becomes with the approaching state in small interval, is clipped in the three-dimensional shape that grumeleuse Gg between the stamping surface of the first metal die 21 and the stamping surface of the second metal die 22 is formed as regulation.
In the present embodiment, the stamping surface of the stamping surface of the first metal die 21 and the second metal die 22 shape separately all has and is used to form the above-mentioned major surfaces of cover-plate glass blank G and above-mentioned sandwiched face and above-mentioned symbol area both sides' shape.In Figure 24, as an example, in the first metal die 21, be provided with and be used to form the above-mentioned major surfaces 1A of cover-plate glass blank or the main stamping surface 21a of 1B, from this main stamping surface to pressing direction, give prominence to and be used to form protuberance 21c, the 21d of above-mentioned sandwiched face 1C and the protuberance 21e that gives prominence to and be used to form the symbol area of above-mentioned recessed structure from this main stamping surface to pressing direction.In addition, in the second metal die 22, be provided with similarly the protuberance 22e that is used to form the above-mentioned major surfaces 1A of cover-plate glass blank or the main stamping surface 22a of 1B, gives prominence to and be used to form protuberance 22c, the 22d of above-mentioned sandwiched face 1C and be used to form the symbol area of above-mentioned recessed structure from this main stamping surface to pressing direction.
Figure 25 means near the sectional view (a) of the shape that the protuberance 21e of above-mentioned the first metal die 21 is and represents near the sectional view (b) of the shape that protuberance 21c is.Above-mentioned protuberance 21e forms the shape corresponding with the shape of the symbol area of the recessed structure forming at the major surfaces of cover-plate glass blank by impact briquetting.In addition, scarp angulation (acute angle) α of preferred main stamping surface 21a and protuberance 21c is the scope of 30 degree～60 degree, more preferably the scope of 45 degree～50 degree.Because the scarp of the protuberance 21c of metal die 21 determines the shape of the above-mentioned sandwiched face of the cover-plate glass blank that obtains by impact briquetting, so less than 30 degree at above-mentioned α, or in the large situation of 60 degree, all can not fully obtain arranging because of the end at cover-plate glass blank the inhibition of the caused stress concentration of sandwiched face.In addition, the scarp shape of protuberance 21c also needs to consider the difficulty or ease of the demoulding after impact briquetting.
In addition, above protuberance 21e, 21c to the first metal die 21 is illustrated, but for the protuberance 21d of the first metal die 21, for protuberance 22c, the 22d of the second metal die 22,22e, also can become identical structure.In addition, when only when certain major surfaces of cover-plate glass blank forms above-mentioned symbol area, as long as be provided for forming the protuberance of above-mentioned symbol area on the metal die corresponding with it.
Figure 26 is the sectional view of the cover-plate glass blank G that directly obtains by the impact briquetting shown in above-mentioned Figure 24 (c).
As shown in figure 26, cover-plate glass blank G has by the main stamping surface 21a of above-mentioned metal die, the opposed a pair of major surfaces that 22a forms, and be provided with that the symbol area 5 of the recessed structure that protuberance 21e, 22e by above-mentioned metal die form and protuberance 21c, 21d, 22c, 22d by above-mentioned metal die form in order to divide the groove 2 of the profile of cover-plate glass for electronics.The inner-wall surface of these a pair of major surfacess, symbol area 5 and groove 2 is and strikes out profile.
For the profile of the cover-plate glass blank G formation cover-plate glass to so obtaining, carry out cutting off the post-treatment by the region of outer circumferential side than above-mentioned groove 2 along cutting off line c1, c2.This post-treatment can at random be applied etch processes, mechanical workout etc.By this post-treatment, form the end face 1D of the cover-plate glass blank shown in above-mentioned Fig. 8 (b).
Wherein, in the present embodiment, the glass basis material (Figure 26) obtaining by above-mentioned impact briquetting, or the glass basis material obtaining by above-mentioned post-treatment is all called " the electronics cover-plate glass blank " of the body material that becomes electronics use cover-plate glass.
In addition, in the situation that manufacture above-mentioned Figure 27, the cover-plate glass blank with opening as shown in Figure 28 by impact briquetting, for example, in the first metal die 21, except being provided for forming the above-mentioned major surfaces 1A of cover-plate glass blank or the main stamping surface 21a of 1B, be used to form the protuberance 21e of above-mentioned symbol area 5 and be used to form protuberance 21c, the 21d of above-mentioned sandwiched face 1C, be also provided with the protuberance 21f that is used to form above-mentioned opening 3.Figure 29 means that above-mentioned opening forms the sectional view of an example of stamping surface shape of the metal die of use.In the example shown in Figure 29, the rake 21g that is used to form the sandwiched face arranging between the inner-wall surface of above-mentioned opening 3 and above-mentioned a pair of major surfaces is arranged between main stamping surface 21a and above-mentioned protuberance 21f.In this situation, about main stamping surface 21a with as the formed angle in scarp (acute angle) α of the outside of rake 21g, be also preferably the scope of 30 degree～60 degree, more preferably the scopes of 45 degree～50 degree.
In addition, to forming the stamping surface shape of the first metal die 21 in the situation of above-mentioned opening 3, be illustrated, but for the stamping surface shape of the second metal die 22, also preferably become identical structure.
Figure 30 is by having used the sectional view of the cover-plate glass blank G that the metal die impact briquetting of above-mentioned Figure 29 stamping surface shape shown in waiting obtains.
As shown in figure 30, cover-plate glass blank G is provided with the symbol area 5 of above-mentioned recessed structure, groove 2 and the opening 3 that division electronics is used the profile of cover-plate glass.The inner-wall surface of these symbol areas 5, groove 2 and opening 3 is and strikes out profile.
For the cover-plate glass blank G to so obtaining forms the profile of cover-plate glass as mentioned above, carry out cutting off the post-treatment by the region of outer circumferential side than above-mentioned groove 2 along cutting off line c1, c2.
Wherein, in Figure 29, Figure 30, represented to form between the inner-wall surface of the above-mentioned opening 3 of cover-plate glass blank G and major surfaces by above-mentioned impact briquetting the example of the situation of sandwiched face, but in the situation that do not form sandwiched face between the inner-wall surface of above-mentioned opening 3 and major surfaces, can between the main stamping surface 21a of above-mentioned metal die 21 and above-mentioned protuberance 21f, above-mentioned rake 21g be set yet.
In addition, in the situation that the major surfaces of the cover-plate glass blank obtaining by impact briquetting forms the symbol area 6 (with reference to Figure 22) of above-mentioned protruding structure, as long as use for example metal die 21 that is provided with the depressed part from main stamping surface to anti-pressing direction depression to carry out impact briquetting.
In addition, by surfaceness the is set asperities portion that be used to form above-mentioned symbol area thicker than the main stamping surface that is used to form major surfaces of at least one party's metal die in pair of metal mould, can complete above-mentioned symbol area having been carried out to striking out in profile after roughened.
In addition, preferably the first metal die 21 and the second metal die 22 are provided with to above-mentioned thermoregulation mechanism, cooling unit.
Wherein, the temperature head at the stamping surface of the first metal die 21 while grumeleuse Gg being carried out to impact briquetting by obtaining in advance and the opposed locations place of the stamping surface of the second metal die 22, and the Flatness of the major surface flat portion of the cover-plate glass blank that obtains after impact briquetting between correlationship, can realize desirable Flatness.
In addition, in the Punch-shaping method of present embodiment, in order there to be the shape of the shape of the main stamping surface 21a of the first metal die 21 and the main stamping surface 22a of the second metal die 22 to form the major surfaces of cover-plate glass blank G with transfer printing, preferably the smoothness of the stamping surface of pair of metal mould is equal with the smoothness of cover-plate glass blank as target.In this situation, can save after impact briquetting the surface working operations such as grinding for the major surfaces of cover-plate glass blank G.
In addition, in the present embodiment, preferably, in raising intensity in the glass basis material (cover-plate glass blank) of cover-plate glass for electronics, also carry out chemical enhanced processing.The method of chemical enhanced processing as mentioned above.
And, by the electronics to after chemical enhanced, with the glass basis material of cover-plate glass, at random form the desirable layer that bands, can be made into final electronics cover-plate glass.
As described above, according to cover-plate glass blank and manufacture method thereof for the electronics of present embodiment, by the symbol area both sides that utilize impact briquetting to form the major surfaces of cover-plate glass blank and be configured in this major surfaces and comprise word or graphical symbol for user is identified simultaneously, can access the electronics cover-plate glass blank that can cut down whole worker ordinal number and can reduce manufacturing cost.
In addition, the restriction that can access design reduces and is difficult to produce the generation of the deformation of following moulding, and the good cover-plate glass blank of visual appearance such as surfaceness.Especially can access and can enhance productivity, be particularly suitable for the electronics cover-plate glass blank of a small amount of many variety production.
And, by using above-mentioned electronics cover-plate glass blank, can access the high-quality electronics cover-plate glass that is formed with desirable symbol area.
Embodiment
Below, for electronics is used respectively to the situation of cover-plate glass with cover-plate glass blank and electronics with cover-plate glass with cover-plate glass blank and portable equipment as portable equipment, enumerate specific embodiment, further the present invention will be described particularly.Wherein, the present invention is not limited to following embodiment.For example, also can using electronics with cover-plate glass blank and electronics with cover-plate glass respectively as cover-plate glass blank and touch sensor cover-plate glass for touch sensor.
(embodiment 1)
In the present embodiment, via following impact briquetting operation, make the cover-plate glass blank of the present embodiment, next by cover-plate glass blank, make glass basis material, chemical enhanced to this glass basis material enforcement, manufacture the glass basis material of cover-plate glass for portable equipment.
[impact briquetting operation]
As glass, form, prepare to contain SiO 2: 62.5～64.5 % by weight, Al 2o 3: 13～15 % by weight, Li 2o:5～7 % by weight, Na 2o:9.5～11.5 % by weight, ZrO 2: the molten glass material of 5～7 % by weight, by having used the method for the device of above-mentioned Fig. 3, Fig. 4, made the cover-plate glass blank with the three-dimensional shape shown in above-mentioned Fig. 1.
Wherein, take the molten glass material that flows out from melten glass spout temperature as 1300 ℃, viscosity be 10 3mode below dPas regulates.In addition, the surfaceness of the first metal die and the second metal die stamping surface is separately expressed as 0.02 μ m with arithmetic average roughness Ra.In addition, with the temperature of the first metal die and the second metal die stamping surface separately, become 400 ℃～500 ℃, the temperature head between each metal die is 10 ℃ and controls in interior mode.In addition, load during punching press is 3000kgf, till the temperature of glass has become about punching press below glass tansition temperature (Tg) 3 seconds.
Made like this portable equipment cover-plate glass blank of the present embodiment.
Next, for the cover-plate glass blank obtaining, measured alkali metal concentration.Results verification: compare with the central part darker than the degree of depth 100nm of main surface side, in the top layer below the degree of depth 100nm of master meter side, the amount of Na ion is few, the alkali metal concentration ratio central part in the top layer of cover-plate glass blank main surface side is little.Wherein, this alkali metal concentration can be by SIMS (Secondary Ion Mass Spectrometry: secondary ion mass spectrometry) measure.
And, for the cover-plate glass blank obtaining, measured the surfaceness of major surfaces.As a result, surface roughness Ra is 10nm.Wherein, surface roughness Ra represents by the arithmetic average roughness Ra being stipulated by JIS B0601:2001, the scanning type probe microscope (atomic force microscope that for example can utilize Japanese Veeco company to manufacture; AFM) nanoscope is measured, and utilizes the method for being stipulated by JIS R1683:2007 to calculate.In the present embodiment, in the square mensuration region of 1 μ m * 1 μ m, the arithmetic average roughness Ra in the time of can using the resolving power determination with 512 * 128 pixels.
As a result, can confirm as for the cover-plate glass blank with the three-dimensional shape of the present embodiment, form in whole surfaceness of its major surfaces almost evenly (in the scope of ± 2.5nm), obtain the good cover-plate glass blank of visual appearance.
In addition, in the present embodiment, as an example, made the cover-plate glass blank of the three-dimensional shape shown in above-mentioned Fig. 1, but according to the present invention, by using the mutual different pair of metal mould of shape of the stamping surface of the first metal die and the second metal die, can make the shape that is not limited to Fig. 1 and the cover-plate glass blank with the various three-dimensional shapes shown in routine Fig. 2 described above, and can, from this cover-plate glass blank self or by cover-plate glass blank being implemented to the processing of regulation, obtain the glass basis material of cover-plate glass for portable equipment.
(comparative example)
In this comparative example, by softening moulding to large stretch of sheet glass being cut into the smooth sheet material that product size obtains, made cover-plate glass blank.Wherein, in this method for making, owing to being difficult to form the three-dimensional shape shown in Fig. 1 identical with embodiment 1, so made the cover-plate glass blank of the shape shown in Fig. 2 (e) and Fig. 2 (f).
Wherein, glass forms identical with embodiment 1.In addition, suitably set and carry out for making each condition that reheats operation, press-bending operation of the softening moulding of sheet material.
For the cover-plate glass blank obtaining by this comparative example like this, measured similarly to Example 1 the surfaceness of major surfaces.As a result, the cover-plate glass blank of this comparative example does not become even in deformation position (crooked punch process portion) and non-deformation position (par) surfaceness.Therefore, for example the transparency of vision seems local different, has produced the problem in visual appearance.In addition, in the deformation position being caused by crooked punch process, a face produces by lax cause concavo-convex, is also producing the problem of visual appearance aspect this.
In a word, the sheet material to smooth in the past softens in the method for making of moulding, except large this problem of restriction that the three-dimensional shape that can make is restricted, design, also has the problem that visual appearance reduces.
Here, by the method for the present embodiment and comparative example, made the cover-plate glass blank that the par of shape shown in Fig. 2 (e) and the thickness of slab of rake are 0.7mm, and the two has been compared.In the cover-plate glass blank of the present embodiment, for the curved part between par and rake, when mutually when compartment of terrain has measured at 10, all converge on 0.7mm ± 25 μ m with (thickness deviation 50 μ m are following) in interior scope.On the other hand, in the cover-plate glass blank of comparative example, for the curved part between par and rake, when mutually when compartment of terrain has measured at 10, with respect to the deviation (thickness deviation 200 μ m left and right) of produced ± 100 μ m left and right of 0.7mm.
In addition, in the cover-plate glass blank of comparative example, can confirm by visual observation to have problems the deviation of the thickness of slab of curved part in visual appearance.On the other hand, in the cover-plate glass blank of the present embodiment, can not confirm by visual observation the deviation of the thickness of slab of curved part, obtain the good three-dimensional shape of visual appearance.
(embodiment 2)
In the present embodiment, via following impact briquetting operation, make the cover-plate glass blank of the present embodiment, then from cover-plate glass blank, make glass basis material, chemical enhanced to this glass basis material enforcement, make the glass basis material of cover-plate glass for portable equipment.
[impact briquetting operation]
As glass, form, prepare to contain SiO 2: 62.5～64.5 % by weight, Al 2o 3: 13～15 % by weight, Li 2o:5～7 % by weight, Na 2o:9.5～11.5 % by weight, ZrO 2: the molten glass material of 5～7 % by weight, by having used the method for the device of above-mentioned Fig. 3, Figure 10, made the cover-plate glass blank with the three-dimensional shape shown in above-mentioned Figure 12.
Wherein, with the temperature of the molten glass material that flows out from melten glass spout, become 1300 ℃, viscosity becomes 10 3mode below dPas regulates.In addition, the surfaceness of the first metal die and the second metal die stamping surface is separately expressed as 0.02 μ m with arithmetic average roughness Ra.In addition, with the temperature of the first metal die and the second metal die stamping surface separately, become 400 ℃～500 ℃, the temperature head between each metal die becomes 10 ℃ and controls in interior mode.In addition, load during punching press is 3000kgf, till the temperature of glass has become punching press below glass tansition temperature (Tg) approximately 3 seconds.
Made like this portable equipment cover-plate glass blank of the present embodiment.
Next, for the profile of the cover-plate glass blank formation cover-plate glass to obtaining like this, carry out cutting off the post-treatment by the region of outer circumferential side than above-mentioned groove 2 along cutting off line c1, c2.This post-treatment has been applied etch processes and has been carried out.By this post-treatment, obtained being formed with the cover-plate glass blank of the end face 1D of the cover-plate glass blank shown in above-mentioned Fig. 8 (b).
Next, the cover-plate glass blank obtaining has been measured to alkali metal concentration.Results verification: compare with the central part darker than the degree of depth 100nm of main surface side, in the top layer below the degree of depth 100nm of main surface side, the amount of Na ion is few, the alkali metal concentration ratio central part in the top layer of cover-plate glass blank main surface side is little.Wherein, this alkali metal concentration can be measured by SIMS (Secondary Ion Mass Spectrometry).
And, the cover-plate glass blank obtaining has been measured to the surfaceness of major surfaces.As a result, surface roughness Ra is 10nm.Wherein, surface roughness Ra represents by the arithmetic average roughness Ra being stipulated by JIS B0601:2001, the scanning type probe microscope (atomic force microscope that for example can utilize Japanese Veeco company to manufacture; AFM) nanoscope is measured, and by the method for being stipulated by JIS R1683:2007, calculates.In the present embodiment, in the square mensuration region of 1 μ m * 1 μ m, the arithmetic average roughness Ra in the time of can using the resolving power determination with 512 * 128 pixels.
Result, cover-plate glass blank for the present embodiment is confirmed as: the form accuracy of sandwiched face is also good, form in whole surfaceness of its major surfaces almost evenly (in the scope of ± 2.5nm), obtained the good cover-plate glass blank of visual appearance.
In addition, in the present embodiment, as an example, made the flat cover-plate glass blank shown in above-mentioned Fig. 8, but according to the present invention, by using the mutual different pair of metal mould of shape of the stamping surface of the first metal die and the second metal die, can make the shape that is not limited to Fig. 8 and the cover-plate glass blank for example with the various three-dimensional shapes shown in above-mentioned Fig. 9.In addition, from this cover-plate glass blank self or by cover-plate glass blank being implemented to the processing of regulation, can access the glass basis material of cover-plate glass for electronics.
(embodiment 3)
In the present embodiment, via following impact briquetting operation, make the cover-plate glass blank of the present embodiment, then from cover-plate glass blank, make glass basis material, chemical enhanced to this glass basis material enforcement, made the glass basis material of portable equipment with cover-plate glass.
As glass, form, prepare to contain SiO 2: 62.5～64.5 % by weight, Al 2o 3: 13～15 % by weight, Li 2o:5～7 % by weight, Na 2o:9.5～11.5 % by weight, ZrO 2: the molten glass material of 5～7 % by weight, by having used the method for the device of above-mentioned Fig. 3, Figure 24, made the cover-plate glass blank with the three-dimensional shape shown in above-mentioned Figure 26.
Wherein, with the temperature of the molten glass material that flows out from melten glass spout, become 1300 ℃, viscosity becomes 10 3the mode of dPas regulates.In addition, the surfaceness of the first metal die and the second metal die main stamping surface is separately expressed as 0.005 μ m with arithmetic average roughness Ra, the surperficial surfaceness of protuberance of symbol area that is used to form recessed structure is thicker than above-mentioned main stamping surface, with arithmetic average roughness Ra, is expressed as 0.1 μ m.In addition, with the temperature of the first metal die and the second metal die stamping surface separately, become 400 ℃～500 ℃, the temperature head between each metal die becomes 10 ℃ and controls in interior mode.In addition, load during punching press is 3000kgf, till the temperature of glass has become punching press below glass tansition temperature (Tg) approximately 3 seconds.
Made like this portable equipment cover-plate glass blank of the present embodiment.
Next, for the profile of the cover-plate glass blank formation cover-plate glass to obtaining like this, carry out cutting off the post-treatment by the region of outer circumferential side than above-mentioned groove 2 along cutting off line c1, c2.This post-treatment has been applied etch processes and has been carried out.By this post-treatment, obtained above-mentioned cover-plate glass blank as shown in Figure 8.
Next, the cover-plate glass blank obtaining has been measured to alkali metal concentration.Results verification: compare with the central part darker than the degree of depth 100nm of main surface side, in the top layer below the degree of depth 100nm of main surface side, the amount of Na ion is few, the alkali metal concentration ratio central part in the top layer of cover-plate glass blank main surface side is little.Wherein, this alkali metal concentration can be measured by SIMS (Secondary Ion Mass Spectrometry).
And, for the cover-plate glass blank obtaining, measured the surfaceness of major surfaces, result, surface roughness Ra is 4nm.In addition, the surface roughness Ra of the internal surface of the symbol area of above-mentioned recessed structure is 50nm.Wherein, surface roughness Ra uses the arithmetic average roughness Ra being stipulated by JIS B0601:2001 to represent, for example, and the scanning type probe microscope (atomic force microscope that can utilize Japanese Veeco company to manufacture; AFM) nanoscope is measured, and by the method for being stipulated by JIS R1683:2007, calculates.In the present embodiment, in the square mensuration region of 1 μ m * 1 μ m, the arithmetic average roughness Ra in the time of can using the resolving power determination with 512 * 128 pixels.
In addition, measured the haze value of the symbol area of above-mentioned recessed structure.That is, utilize the automatic mark mist degree instrument TC-HIIIDPK/II of (having) Tokyo electricity look manufacture to measure, the result of measuring according to JISK7136 is 25%.
In addition, in the present embodiment, as an example, made above-mentioned flat cover-plate glass blank as shown in Figure 8, but according to the present invention, by using the mutual different pair of metal mould of shape of the stamping surface of the first metal die and the second metal die, can make the shape that is not limited to Fig. 8 and the cover-plate glass blank for example with above-mentioned various three-dimensional shapes as shown in Figure 9.In addition, from this cover-plate glass blank self or by cover-plate glass blank being implemented to the processing of regulation, can access the glass basis material of cover-plate glass for electronics.
Nomenclature
1A, 1B ... the a pair of major surfaces of cover-plate glass blank; 1C ... the end face of cover-plate glass blank (sandwiched face); 1D ... the end face of cover-plate glass blank; 2 ... groove; 3 ... opening; 5,6 ... symbol area; 10 ... device; 20,30,40,50 ... punching unit; 21 ... the first metal die; 22 ... the second metal die; 21a, 22a ... metal die stamping surface (main stamping surface); 60 ... cutting unit; 100 ... electronics; 200 ... electronics cover-plate glass; G ... cover-plate glass blank.

Claims (21)

1. an electronics cover-plate glass blank, is characterized in that,
The electronics cover-plate glass blank with a pair of major surfaces and the end face adjacent with this pair of major surfaces,
Described a pair of major surfaces is to become mutual asymmetrical shape with respect to thickness direction,
The described a pair of major surfaces profile that strikes out that direct punching press forms of all serving as reasons.
2. an electronics cover-plate glass blank, is characterized in that,
There is opposed a pair of major surfaces, and by the mode of the profile of cover-plate glass, be provided with groove to divide electronics,
At least a portion of the inner-wall surface of described a pair of major surfaces and described groove is all the profiles that strike out that formed by direct punching press.
3. an electronics cover-plate glass blank, is characterized in that,
There is opposed a pair of major surfaces,
The symbol area of the symbol that at least one party in described a pair of major surfaces is provided for that user is identified and comprises word or figure,
Described a pair of major surfaces and described symbol area are all the profiles that strike out that formed by direct punching press.
4. according to the cover-plate glass blank of the electronics described in any one in claim 1～3, it is characterized in that,
Form whole the even surface roughness of described major surfaces at described cover-plate glass blank.
5. according to the cover-plate glass blank of the electronics described in any one in claim 1～4, it is characterized in that,
At least one party's major surfaces in described a pair of major surfaces is formed with bend at thickness direction.
6. according to the cover-plate glass blank of the electronics described in any one in claim 1～4, it is characterized in that,
At described cover-plate glass blank, be formed with par and with respect to the bend of described par through-thickness bending,
The thickness of slab of described bend is in the scope with respect to the thickness of slab ± 25 μ m of described par.
7. according to the cover-plate glass blank of the electronics described in any one in claim 1～6, it is characterized in that,
The end of at least one party's major surfaces in described a pair of major surfaces is formed with the rake with respect to thickness direction inclination.
8. according to the cover-plate glass blank of the electronics described in any one in claim 1～7, it is characterized in that,
At described cover-plate glass blank, be formed with opening, at least a portion of the inner-wall surface of described opening strikes out profile described in being.
9. electronics according to claim 8 cover-plate glass blank, is characterized in that,
Between the inner-wall surface and described a pair of major surfaces of described opening, be provided with the sandwiched face that strikes out profile being formed by direct punching press.
10. according to the cover-plate glass blank of the electronics described in any one in claim 1～9, it is characterized in that,
Described cover-plate glass blank is that the chemical enhanced glass that can carry out based on ion-exchange forms.
11. 1 kinds of electronicss manufacture method of cover-plate glass blank, is characterized in that,
To there is the manufacture method of cover-plate glass blank for the electronics of a pair of major surfaces and the end face adjacent with this pair of major surfaces,
Comprise piece the stamping forming molding procedure of using pair of metal mould to catch the melten glass of being supplied with by melten glass supply unit,
The shape of the stamping surface of described pair of metal mould is mutual different shape, so that the described a pair of major surfaces of the described cover-plate glass blank obtaining by moulding becomes mutual asymmetrical shape.
12. 1 kinds of electronicss manufacture method of cover-plate glass blank, is characterized in that,
This electronics becomes with cover-plate glass blank and has opposed a pair of major surfaces, is present in the end face between this pair of major surfaces and is configured at least any one party major surfaces in described a pair of major surfaces and the body material of cover-plate glass for the electronics of the sandwiched face between described end face
This electronics comprises and uses pair of metal mould to carry out stamping forming molding procedure to the piece of the melten glass of being supplied with by melten glass supply unit by the manufacture method of cover-plate glass blank,
The stamping surface of at least one party's metal die in described pair of metal mould has the shape that is used to form described major surfaces and described sandwiched face both sides.
The manufacture method of cover-plate glass blank for 13. electronicss according to claim 12, is characterized in that,
At least one party's metal die in described pair of metal mould is provided with and is used to form the metal die stamping surface of described major surfaces and to pressing direction, gives prominence to and be used to form the protuberance of described sandwiched face from this metal die stamping surface.
14. 1 kinds of electronicss manufacture method of cover-plate glass blank, is characterized in that,
This electronics becomes with cover-plate glass blank the body material that the electronics that has opposed a pair of major surfaces and be present in the end face between this pair of major surfaces is used cover-plate glass,
Described electronics comprises and uses pair of metal mould to carry out stamping forming molding procedure to the piece of the melten glass of being supplied with by melten glass supply unit by the manufacture method of cover-plate glass blank,
The stamping surface of at least one party's metal die in described pair of metal mould has and is used to form described major surfaces and is configured in this major surfaces and for the symbol area both sides' of the symbol that user identified comprise word or figure shape.
The manufacture method of cover-plate glass blank for 15. electronicss according to claim 14, is characterized in that,
At least one party's metal die in described pair of metal mould be provided be used to form described major surfaces main stamping surface, from this main stamping surface to pressing direction, give prominence to and be used to form the protuberance of described symbol area and from this main stamping surface to anti-pressing direction, cave in and be used to form at least any one party of the depressed part of described symbol area.
16. according to the manufacture method of the electronics use cover-plate glass blank described in claim 14 or 15, it is characterized in that,
At least one party's metal die in described pair of metal mould is provided with that to be used to form the main stamping surface of described major surfaces and surfaceness thicker and be used to form the asperities portion of described symbol area than this main stamping surface.
17. according to the manufacture method of the electronics use cover-plate glass blank described in any one in claim 11～16, it is characterized in that,
In described molding procedure, the piece for the melten glass in being supplied with by described melten glass supply unit and aloft moving, catches and impact briquetting with the pair of metal mould being configured in its travel direction orthogonal directions.
18. according to the manufacture method of the electronics use cover-plate glass blank described in any one in claim 11～17, it is characterized in that,
The viscosity of described melten glass when moulding is 10 5below dPas.
19. according to the manufacture method of the electronics use cover-plate glass blank described in any one in claim 11～18, it is characterized in that,
At described pair of metal mould, be provided with from described main stamping surface to pressing direction outstanding and for form the protuberance of opening with cover-plate glass blank at described electronics.
20. 1 kinds of electronicss manufacture method of cover-plate glass, is characterized in that,
With the electronics by described in any one in claim 11～19, with the cover-plate glass blank that the manufacture method of cover-plate glass blank obtains, manufacture electronics cover-plate glass.
21. 1 kinds of electronics cover-plate glass, is characterized in that,
Possess glass basis material, this glass basis material has opposed a pair of major surfaces, be present in the end face between this pair of major surfaces and be configured at least one party's major surfaces in described a pair of major surfaces and the sandwiched face between described end face,
Described a pair of major surfaces and described sandwiched face are all the profiles that strike out that formed by direct punching press.
CN201280057050.2A 2011-11-30 2012-11-30 Electronic device cover glass blank, method for manufacturing same, electronic device cover glass, and method for manufacturing same Pending CN103946166A (en)

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