CN102329070A - Glass plate manufacturing device, glass plate, glass material for punch forming, optical element and sheet glass manufacturing method - Google Patents

Glass plate manufacturing device, glass plate, glass material for punch forming, optical element and sheet glass manufacturing method Download PDF

Info

Publication number
CN102329070A
CN102329070A CN2011101620968A CN201110162096A CN102329070A CN 102329070 A CN102329070 A CN 102329070A CN 2011101620968 A CN2011101620968 A CN 2011101620968A CN 201110162096 A CN201110162096 A CN 201110162096A CN 102329070 A CN102329070 A CN 102329070A
Authority
CN
China
Prior art keywords
mentioned
glass
heat
sheet glass
eliminating medium
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.)
Granted
Application number
CN2011101620968A
Other languages
Chinese (zh)
Other versions
CN102329070B (en
Inventor
前田伸广
内田一弥
渡边义晴
小熊孙权
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
Priority claimed from JP2010137502A external-priority patent/JP5537278B2/en
Priority claimed from JP2010137507A external-priority patent/JP5618645B2/en
Priority claimed from JP2010137505A external-priority patent/JP5075228B2/en
Application filed by Hoya Corp filed Critical Hoya Corp
Publication of CN102329070A publication Critical patent/CN102329070A/en
Application granted granted Critical
Publication of CN102329070B publication Critical patent/CN102329070B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

The present invention provides a glass plate manufacturing device, a glass plate, a glass material for punch forming, an optical element and a sheet glass manufacturing method, wherein in the case that the glass is not casted in a casting mould, bending and uneven tree marks can be prevented, and a high-quality glass plate with uniform thickness and small warpage can be stably formed. The glass plate manufacturing device has a casting mould and comprises: a pair of opposite side walls used for defining width of the glass plate; and a bottom of an upper surface provided with one of two opposite main surfaces of a moulded glass plate. The bottom is provided with at least two through holes approximately vertical to the side wall and approximately parallel to the upper surface therein, a side surface at bottom of the through holes which is connected with an outer side surface of the side wall is provided with an opening. The manufacturing device comprises a cooling medium supply tube which is provided with at least one exhaust nozzle used for exhausting cooling medium to the side surface. The cooling medium supply tube is configurated to pass in and out the inner of the through hole freely, at least one of the exhaust nozzles is arranged in the through hole. The cooling medium supply tube has the size and/or shape in which the cooling medium exhausted from the exhaust nozzle can flow from the opening to an outer side of the through hole when configurated in the through hole.

Description

The manufacturing installation of sheet glass, sheet glass, impact briquetting are with the method for manufacture of glass material, optical element and sheet glass
Technical field
The sheet glass that the present invention relates to the manufacturing installation of sheet glass and use this manufacturing installation that the continuously shaped method as the highly homogeneous sheet glass of the such requirement of opticglass of melten glass, use are made through aforesaid method is made the method for impact briquetting with glass material, optical element, sheet glass.
And then, the invention still further relates to the continuously shaped method of highly homogeneous sheet glass, the sheet glass that use is made through aforesaid method of requiring for opticglass is such of melten glass made the method for impact briquetting with glass material, optical element, sheet glass respectively.
Background technology
As opticglass, requiring the height uniformity; And be in the tabular technology than building materials with the glass ware forming of height such as sheet glass (being easy to crystallization) with liquidus temperature; Known in the past will being cast into continuously the horizontally disposed fixedly casting mold from the effusive glass of the less nozzle of sectional area, it is big and be the method for the sheet glass of plate shape to make sectional area.
Patent documentation 1 discloses and has made melten glass flow out continuously and flow into the casting mold from outlet pipe glass is carried out moulding, simultaneously from being arranged at the glass forming method that mouth is pulled out the glass after the moulding that pulls of casting mold side.Patent documentation 2,3,4 discloses and has made melten glass when outlet pipe flows out continuously and flow into the casting mold the moulding of glass type, cooling plate is come cooled glass by the surface on glass that is pressed in the soft state in the casting mold, thereby obtain the uniform sheet glass of thickness.Be machined for the glass material of optical element such as impact briquetting lens after the sheet glass of the pulling out annealing.
As describe on prior art one hurdle of patent documentation 1 " use be arranged at the glass outlet pipe under the fixed forming technique that stops the grooved casting mold in, the casting mold upper surface under the outlet pipe melten glass under the even flow often receives heat, be that temperature is the highest in casting mold; be easy to and beading; therefore in order to prevent this welding, need control above-mentioned casting mold upper surface to such an extent that be lower than other positions, obtain balance; this temperature control is common only to be carried out through one-side cooling operation "; That kind is cooled off casting mold through being expressed as 3,3 ' equipment, prevents beading.
The special fair 5-31505 communique of [patent documentation 1] Japan
[patent documentation 2] TOHKEMY 2002-265229 communique
[patent documentation 3] TOHKEMY 2004-292274 communique
[patent documentation 4] TOHKEMY 2009-46360 communique
In the patent documentation 1 described casting mold, position under outlet pipe and location downstream thereof are disposing water cooler 3 with the vertical direction of the pull-out direction of glass, and this external ditch portion and sidewall dispose water cooler 1,8 (Fig. 1～Fig. 2) respectively.In addition, conduct has now in routine Fig. 5 a, the casting mold shown in Fig. 5 b in patent documentation 1, cools off with promotion disposing water cooler 1 under the outlet pipe and bottom ditch portion or the ditch portion.
When melten glass being carried out under the situation of moulding through patent documentation 1 described casting mold; If not make beading in the mode of casting mold, especially carry out the moulding of sheet glass simultaneously through water cooler 3,3 ' promotion casting mold refrigerative; Then the casting mold width can be bigger; Its result makes that the width of glass sheet of institute's moulding is bigger; And the sheet thickness of institute's moulding is thinner, and (for example width is 6～30mm, width/thickness in 3～50 scope more than or equal to 100mm, thickness) is if (for example be 20～140mL/min), then can occur owing to the bad uneven thickness that causes that extends from the flow of the effusive melten glass of nozzle is less at this moment; Or produce, or produce the concavo-convex such problem that is known as the tree line unevenly in the glass bottom surface to the inner folding line of glass.
On the other hand, if during from the flow of the effusive melten glass of nozzle more (for example surpass 140mL/min), then the zone of pyritous melten glass can broaden on forming direction and move.If cool off with near mode identical at width and that become proper states under the nozzle, it is bad that then its centre line zone that is in downstream area slightly can become cooling, has the possibility that is fused to casting mold.In addition, if likewise to cooling off on a large scale, can be produced owing to the bad uneven thickness that causes that extends sometimes by undercooling near the then eccentric sidewall, or produce, produce uneven concavo-convex and crackle at glass surface to the inner folding line of glass.In addition, if only cool off centre line zone, then can produce the warpage of left and right sides object at width with the mode that is not fused to casting mold.
The part that produces folding line can diminish the optics uniformity, is inappropriate for the material of used for optical elements.The impact briquetting of being made by sheet glass possesses one by one if not use with the glass material that the glass of intended component (certainweight) makes, and then the formed precision during impact briquetting will reduce.If the thickness and the width of sheet glass are certain, then sheet glass uniformly-spaced is divided into the point-like of dice, then can obtain to be known as section etc. the sheet glass of weight, if barreling is carried out in these sections, then can produce the glass material of weight such as a plurality of.Yet, if there is uneven tree line in the sheet glass upper surface, can cause the deviation of thickness of slab, even if sheet glass is uniformly-spaced separated, the section and the glass material of weight such as also can't obtain.In addition, because the bad and uneven thickness or exist in the glass shape of warpage and also same result can occur of extending.Therefore, must process the sheet glass upper surface smooth.Opticglass has used rare earth class become the to grade migration metal ingredient of high price in a large number in order to improve specific refractory power; In order to be used for hanging down decentralized and a large amount of fluoride raw materials that adopt high price; And, can cause the problem that to use high price glass fully and make its waste owing in a big way, cut glass pane surface.
As stated; Under the situation of using identical casting mold,, different from the viscosity of the effusive melten glass of nozzle according to the glass types of institute's moulding and required glass sheet size; Thereby the flow velocity of melten glass also can change; Its result causes, owing to use identical casting mold to make width identical, however thickness and the translational speed difference of glass in casting mold of wanting moulding.Under the situation of using patent documentation 1 described existing casting mold, be difficult to come the formed glass plate with best cooling conditions according to the variation of such condition of molding.
Summary of the invention
So; The object of the present invention is to provide a kind of manufacturing installation of sheet glass, it solves above-mentioned problem, according to the condition of molding of sheet glass; With best cooling conditions cooling glass to be formed; Make glass can not be fused to casting mold, prevent to produce folding line and uneven tree line, can stably mold shape well is the high-quality sheet glass that thickness is even and warpage is little.The present invention also aims to provide a kind of use above-mentioned manufacturing installation; Make glass can not be fused to casting mold; Prevent to produce folding line and uneven tree line, stably mold the good high-quality sheet glass of shape method, use the sheet glass of producing through this method to make the method for impact briquetting with glass material and optical element.
And then; The present invention also aims to provide a kind of solution above-mentioned problem; Make glass can not be fused to casting mold; Prevent to produce folding line and uneven tree line, can stably mold shape well is that the method for manufacture of the high-quality sheet glass that thickness is even and warpage is little, the sheet glass that use is produced through aforesaid method are made the method for impact briquetting with glass material, optical element and sheet glass respectively.
The inventor etc. have carried out various researchs for solving above-mentioned problem.Its result recognizes according to the sheet glass manufacturing installation with following structure; Then can be according to the condition of molding of sheet glass cooling conditions cooling glass to be formed with the best; Make glass can not be fused to casting mold; Prevent to produce folding line and uneven tree line; Stable mold high-quality sheet glass, thereby accomplished first aspect of the present invention, the structure of above-mentioned sheet glass manufacturing installation is provided with for the inside in the bottom of casting mold can freely insert in 2 the through hole at least has the heat-eliminating medium supply-pipe that is used for spraying to the side at least 1 ejiction opening of heat-eliminating medium.
And then also recognize; The sheet thickness bigger, to be formed when the casting mold width is thinner; Under the less situation of the flow of the effusive melten glass of nozzle; Through carrying out being cast into and flat moulding of melten glass simultaneously following zone being carried out local refrigerative; Aforementioned region for the position under the effusive nozzle of melten glass institute of overlooking above-mentioned upper surface when observing the casting mold upper surface and the position under the said nozzle along the zone that forming direction extends, and, do not produce the problem such as concavo-convex of setting line that is known as unevenly to the inner folding line of glass, in the glass bottom surface thereby can not occur producing so that aforementioned region has the mode of roughly the same width towards downstream and cools off; Mold sheet glass, thereby accomplished second aspect of the present invention.
In addition; The sheet thickness bigger, to be formed when the casting mold width approaches (for example width is that 6～30mm, width/thickness are 3～80 scope more than or equal to 100mm, thickness); And under the more situation of the flow of the effusive melten glass of nozzle; Through carrying out being cast into and flat moulding of melten glass simultaneously following zone being carried out local refrigerative; Aforementioned region is the position under the effusive nozzle of melten glass institute of overlooking above-mentioned upper surface when observing the casting mold upper surface and the position under the said nozzle zone along the forming direction extension; And so that aforementioned region towards downstream the mode that increases intermittently or continuously of width cool off; Thereby can suppress the situation of beading, can not occur producing and produce the problem such as concavo-convex that is known as the tree line to the inner folding line of glass, on surface on glass unevenly, and can not produce glass bad, the unequal problem of sheet thickness that extends in casting mold; Can mold sheet glass, thereby accomplish the third aspect of the invention.
First aspect of the present invention is following.
【1】
A kind of manufacturing installation of sheet glass, it has casting mold.This casting mold has: a pair of relative sidewall of the width of regulation sheet glass; And have the bottom of the side in 2 relative major surfacess of above-mentioned sheet glass being carried out the face (below be referred to as upper surface) of moulding, wherein,
Above-mentioned bottom have in inside with above-mentioned sidewall approximate vertical and with at least 2 through holes of upper surface almost parallel, above-mentioned through hole has opening in the side that links to each other with outer side above-mentioned sidewall the bottom,
Above-mentioned manufacturing installation comprises the heat-eliminating medium supply-pipe, and this heat-eliminating medium supply-pipe has at least 1 ejiction opening that is used for to side ejection heat-eliminating medium,
Above-mentioned heat-eliminating medium supply-pipe is configured to can freely come in and go out above-mentioned through hole inside, and in the above-mentioned ejiction opening at least 1 is positioned at through hole,
Above-mentioned heat-eliminating medium supply-pipe has following size and/or shape: under the situation in being disposed at above-mentioned through hole, can make from the heat-eliminating medium of above-mentioned ejiction opening ejection to flow to outside the through hole from above-mentioned opening.
【2】
Manufacturing installation according to [1] described sheet glass; The inner heat-eliminating medium that imports of above-mentioned heat-eliminating medium supply-pipe in being disposed at above-mentioned through hole; From above-mentioned ejiction opening ejection heat-eliminating medium, cool off near the upper surface of above-mentioned ejiction opening, and will be cast into above-mentioned casting mold continuously from the effusive melten glass of nozzle; Make after being cast into glass from upstream side downstream side carry out folk prescription and move to (below be referred to as forming direction), thereby at the above-mentioned sheet glass of travel direction moulding of above-mentioned glass.
【3】
According to the manufacturing installation of [1] or [2] described sheet glass, be provided with a plurality of above-mentioned through holes and above-mentioned heat-eliminating medium supply-pipe, above-mentioned a plurality of heat-eliminating medium supply-pipes have the ejiction opening of same number each other, or have the ejiction opening of different each other numbers.
【4】
According to the manufacturing installation of [3] described sheet glass, the ejiction opening that above-mentioned a plurality of heat-eliminating medium supply-pipes have different numbers each other, the number of ejiction opening increases towards forming direction.
【5】
Manufacturing installation according to each described sheet glass in [1] to [4]; Above-mentioned heat-eliminating medium supply-pipe has the heat-eliminating medium that can make from the ejiction opening ejection and flows to the gap outside the through hole from above-mentioned opening between the internal surface of side with above-mentioned ejiction opening and the above-mentioned through hole relative with this side.
【6】
According to the manufacturing installation of each described sheet glass in [1] to [5], the quantity of above-mentioned through hole and above-mentioned heat-eliminating medium supply-pipe is in 2～10 scope.
【7】
According to the manufacturing installation of each described sheet glass in [1] to [6], the cross-sectional shape of heat-eliminating medium supply-pipe is semicircle, is provided with above-mentioned ejiction opening in semicircular par.
【8】
The method of manufacture of the sheet glass of each described manufacturing installation in a kind of use [1] to [7] wherein, has:
Confirm to be disposed at the quantity of the heat-eliminating medium supply-pipe in the manufacturing installation and the number of the ejiction opening that allocation position, heat-eliminating medium supply-pipe have, prepare the operation of manufacturing installation; And
To be cast into continuously in the casting mold of ready manufacturing installation from the effusive melten glass of nozzle; Make the glass that is cast into along above-mentioned two sidewalls from upstream side downstream side unidirectional (below be referred to as forming direction) move; The operation of continuously flat sheet glass being carried out moulding simultaneously
Be cast into and the flat moulding of above-mentioned melten glass is to carry out simultaneously in that following zone (below be referred to as cooling promote zone) carried out local refrigerative, and aforementioned region is that position and the position under the said nozzle under the said nozzle of overlooking above-mentioned upper surface when observing above-mentioned upper surface is along zone that forming direction extends.
【9】
According to [8] described method of manufacture, the number that is disposed at the quantity of the heat-eliminating medium supply-pipe in the above-mentioned manufacturing installation and the ejiction opening that allocation position, heat-eliminating medium supply-pipe have is determined to be and makes above-mentioned cooling promote the zone to have roughly the same width towards forming direction.
【10】
According to [8] described method of manufacture, the number that is disposed at the quantity of the heat-eliminating medium supply-pipe in the above-mentioned manufacturing installation and the ejiction opening that allocation position, heat-eliminating medium supply-pipe have is determined to be the width that makes above-mentioned cooling promote the zone and increases intermittently or continuously towards forming direction.
【11】
A kind ofly be used to heat, softening with the method for manufacture of stamping forming impact briquetting with the glass material, it makes sheet glass through each said method in [8] to [10], cuts apart above-mentioned sheet glass and makes a plurality of glass and cut into slices, and above-mentioned section is processed.
【12】
A kind of method of manufacture of optical element; The glass material is heated, softens; Make glass optical element through after the impact briquetting operation, it is made impact briquetting through [11] described method and uses the glass material, to above-mentioned glass material heat, soften, impact briquetting.
【13】
A kind of method of manufacture of sheet glass is made sheet glass through each said method in [8] to [10], through comprising cutting processing in interior operation, makes sheet glass by above-mentioned sheet glass.
Second aspect present invention is following.
【1】
A kind of method of manufacture of sheet glass; This method will be cast in the casting mold from the effusive melten glass of nozzle continuously; This casting mold have the regulation sheet glass width a pair of relative sidewall and have the bottom of the side in 2 relative major surfacess of above-mentioned sheet glass being carried out the face (below be referred to as upper surface) of moulding; Make the glass that is cast into along above-mentioned two sidewalls from upstream side downstream side unidirectional (below be referred to as forming direction) move; Simultaneously continuously flat sheet glass is carried out moulding, wherein
Be cast into and the flat moulding of above-mentioned melten glass is to carry out simultaneously in that following zone (below be referred to as cooling promote zone) carried out local refrigerative, and aforementioned region is roughly the same width is extended and have in position and the position under the said nozzle under the said nozzle of overlooking above-mentioned upper surface when observing above-mentioned upper surface towards forming direction zone.
【2】
According to [1] described method of manufacture, the width of above-mentioned flat sheet glass to thickness than being in 3～50 the scope.
【3】
According to [1] or [2] described method of manufacture, above-mentioned cooling promotes that the width in zone is in 5～40% the scope of width of above-mentioned upper surface.
【4】
According to each described method of manufacture in [1] to [3], above-mentioned cooling promotes the position under the zone passage nozzle, has the symmetric shape of imaginary line of extending about towards forming direction.
【5】
According to each described method of manufacture in [1] to [4], above-mentioned cooling promotes the zone to be arranged at position under the nozzle to be in up to the temperature of glass towards forming direction between Tg-100 ℃ of glass tansition temperatures～Tg+100 ℃ the position of scope.
【6】
According to each described method of manufacture in [1] to [4], the bottom of above-mentioned casting mold have in inside with above-mentioned sidewall approximate vertical and with at least 2 through holes of upper surface almost parallel,
In the above-mentioned through hole one is equipped on the position under the nozzle, and remaining at least 1 through hole is equipped on the position, downstream side under the nozzle,
Above-mentioned through hole has opening in the side that links to each other with outer side above-mentioned sidewall the bottom,
Has at least 1 ejiction opening that is used for to side ejection heat-eliminating medium in above-mentioned each through hole; And the heat-eliminating medium supply-pipe has the heat-eliminating medium that can make from the ejection of above-mentioned ejiction opening and can flow to size and/or shape outside the through hole from above-mentioned opening; And the medium supply-pipe that is cooled is configured to make at least 1 in the above-mentioned ejiction opening and is positioned at through hole
Above-mentioned heat-eliminating medium supply-pipe has the ejiction opening that number is identical and shape is identical each other,
Inner through heat-eliminating medium being imported the above-mentioned heat-eliminating medium supply-pipe that is disposed in the above-mentioned through hole, from above-mentioned ejiction opening ejection heat-eliminating medium, near the upper surface the above-mentioned ejiction opening is cooled off, carry out the cooling of aforementioned region.
【7】
According to [5] described method of manufacture, wherein, the quantity of above-mentioned through hole and above-mentioned heat-eliminating medium supply-pipe is in 2～10 scope.
【8】
A kind ofly be used to heat, softening with the method for manufacture of stamping forming impact briquetting with the glass material, wherein,
Make sheet glass through [1] to [7] described method, cut apart above-mentioned sheet glass and make a plurality of glass sections, above-mentioned section is processed.
【9】
A kind of method of manufacture of optical element heats, softens the glass material, makes glass optical element through the impact briquetting operation, wherein,
Make impact briquetting through [8] described method and use the glass material, above-mentioned glass material is heated, softens, carry out impact briquetting.
【10】
A kind of method of manufacture of sheet glass is made sheet glass through [1] to [7] described method, through comprising cutting processing in interior operation, makes sheet glass by above-mentioned sheet glass.
Third aspect present invention is following.
【1】
A kind of method of manufacture of sheet glass; This method will be cast in the casting mold from the effusive melten glass of nozzle continuously; This casting mold have the regulation sheet glass width a pair of relative sidewall and have the bottom of the side in 2 relative major surfacess of above-mentioned sheet glass being carried out the face (below be referred to as upper surface) of moulding, make the glass that is cast into along above-mentioned two sidewalls from upstream side downstream side unidirectional (below be referred to as forming direction) move continuously shaped flat sheet glass simultaneously; Wherein
Be cast into and the flat moulding of above-mentioned melten glass is to carry out simultaneously in that following zone (below be referred to as cooling promote zone) carried out local refrigerative, aforementioned region be under the said nozzle of overlooking above-mentioned upper surface when observing above-mentioned upper surface position and the position under the said nozzle forming direction extend and width towards the downstream side intermittently or the zone that increases continuously.
【2】
According to [1] described method of manufacture, wherein, the width of above-mentioned flat sheet glass to thickness than being in 3～80 the scope.
【3】
According to [1] or [2] described method of manufacture; Above-mentioned cooling promotes that zone width of position under nozzle is in 30～70% the scope of width of above-mentioned upper surface, in the width of downstream position is 60～90% the scope of width of above-mentioned upper surface.
【4】
According to [1] to [3] each described method of manufacture, above-mentioned cooling promotes the position under the zone passage nozzle, is provided with symmetrically about the imaginary line that extends towards forming direction.
【5】
According to [1] to [4] each described method of manufacture, above-mentioned cooling promotes the zone to be arranged at position under the nozzle to be in up to glass temperature towards forming direction between Tg-100 ℃ of glass tansition temperatures～Tg+100 ℃ the position of scope.
【6】
According to [1] to [5] each described method of manufacture, the bottom of above-mentioned casting mold have in inside with above-mentioned sidewall approximate vertical and with at least 2 through holes of upper surface almost parallel,
In the above-mentioned through hole one is equipped on the position under the nozzle, and remaining at least 1 through hole is equipped on the position, downstream side under the nozzle,
Above-mentioned through hole has opening in the side that links to each other with outer side above-mentioned sidewall the bottom,
Has at least 1 ejiction opening that is used for to side ejection heat-eliminating medium in above-mentioned each through hole; And the heat-eliminating medium supply-pipe has the heat-eliminating medium that can make from the ejection of above-mentioned ejiction opening and flows to size and/or shape outside the through hole from above-mentioned opening; And the heat-eliminating medium supply-pipe is configured to make in the above-mentioned ejiction opening at least one to be positioned at through hole
Inner through heat-eliminating medium being imported the above-mentioned heat-eliminating medium supply-pipe that is disposed in the above-mentioned through hole, from above-mentioned ejiction opening ejection heat-eliminating medium, near the upper surface the above-mentioned ejiction opening is cooled off, carry out the cooling of aforementioned region.
【7】
According to [5] described method of manufacture, wherein, the quantity of above-mentioned through hole and above-mentioned heat-eliminating medium supply-pipe is in 2～10 scope.
【8】
A kind ofly be used to heat, softening with the method for manufacture of stamping forming impact briquetting with the glass material, wherein,
Make sheet glass through [1] to [7] each described method, cut apart above-mentioned sheet glass and make a plurality of glass sections, above-mentioned section is processed.
【9】
A kind of method of manufacture of optical element heats, softens the glass material, makes glass optical element through the impact briquetting operation, wherein,
Make impact briquetting through [8] described method and use the glass material, above-mentioned glass material is heated, softens, carry out impact briquetting.
【10】
A kind of method of manufacture of sheet glass wherein, is made sheet glass through [1] to [7] each described method, through comprising cutting processing in interior operation, makes sheet glass by above-mentioned sheet glass.
Manufacturing installation according to sheet glass of the present invention; Can be according to the condition of molding of sheet glass, with the cooling conditions of the best glass to be formed is cooled off, make glass can not be fused to casting mold; Prevent the generation of folding line and uneven tree line, can stablize and mold high-quality sheet glass.
According to second aspect present invention; When the casting mold width bigger; Thereby the width of the sheet glass of institute's moulding sheet thickness big, institute's moulding is thinner; Under the less situation of the flow of the effusive melten glass of nozzle, can not occur producing yet and produce the problem such as concavo-convex that is known as the tree line to the inner folding line of glass, in the glass bottom surface unevenly, can mold sheet glass.And then; Can also provide cut-out to make the method for impact briquetting with material through the sheet glass that aforesaid method obtains; Use this impact briquetting to carry out impact briquetting with material; And make the method for opticses such as lens according to the moulding article that obtained, make the method for manufacture of the sheet glass of sheet glass by above-mentioned sheet glass in interior operation through comprising cutting processing.
According to third aspect present invention; When the casting mold width bigger; Sheet thickness to be formed is thinner, under the more situation of the flow of the effusive melten glass of nozzle, also can suppress beading in casting mold; Can not occur producing and produce the problem such as concavo-convex that is known as the tree line to the inner folding line of glass, in the glass bottom surface unevenly, mold sheet glass.And then; Can also provide cut-out to make the method for impact briquetting with material through the sheet glass that this method obtains; Use this impact briquetting to carry out impact briquetting with material; And make the method for opticses such as lens according to the moulding article that obtained, make the method for manufacture of the sheet glass of sheet glass by above-mentioned sheet glass in interior operation through comprising cutting processing.
Description of drawings
Fig. 1 overlooks the synoptic diagram of observation as the casting mold 1 of an example of the casting mold of manufacturing installation of the present invention.Fig. 1 still overlooks the synoptic diagram of observation as the casting mold 1 of an example of employed casting mold in the method for manufacture of the present invention the 2nd aspect.
The vertical section of the A-A of Fig. 2 presentation graphs 1.
The cooling that Fig. 3 representes to overlook when observing Fig. 1, the casting mold shown in 2 promotes the zone.
Fig. 4 overlooks the synoptic diagram of observation as the casting mold 1 of an example of the casting mold of manufacturing installation of the present invention.Fig. 4 still overlooks the synoptic diagram of observation as the casting mold 1 of an example of employed casting mold in the method for manufacture of the present invention the 3rd aspect.
The vertical section of the A-A of Fig. 5 presentation graphs 4.
The cooling that Fig. 6 representes to overlook when observing Fig. 4, the casting mold shown in 5 promotes the zone.
Label declaration
1 casting mold; 11,11 ' sidewall; 12 blocks; 13 bottoms; 14 holes; 2 glass; 3 nozzles; 4,5 heat-eliminating medium supply-pipes; 41,51 ejiction openings
Embodiment
[manufacturing installation of sheet glass]
The manufacturing installation of sheet glass of the present invention has casting mold, and this casting mold has: a pair of relative sidewall of the width of regulation sheet glass; And has a bottom of the side in 2 relative major surfacess of above-mentioned sheet glass being carried out the face (below be referred to as upper surface) of moulding.Above-mentioned bottom have in inside with above-mentioned sidewall approximate vertical and with at least 2 through holes of upper surface almost parallel, above-mentioned through hole has opening in the side that links to each other with outer side above-mentioned sidewall the bottom.Above-mentioned manufacturing installation comprises the heat-eliminating medium supply-pipe, and this heat-eliminating medium supply-pipe has at least 1 ejiction opening that is used for to side ejection heat-eliminating medium.Above-mentioned heat-eliminating medium supply-pipe is configured to can freely come in and go out above-mentioned through hole inside, and in the above-mentioned ejiction opening at least 1 is positioned at through hole.Above-mentioned heat-eliminating medium supply-pipe has following size and/or shape: under the situation in being disposed at above-mentioned through hole, can make from the heat-eliminating medium of above-mentioned ejiction opening ejection to flow to outside the through hole from above-mentioned opening.
Following with reference to description of drawings preferred implementation of the present invention.
Fig. 1 and Fig. 4 overlook the synoptic diagram of observation as the casting mold 1 of an example of the casting mold that manufacturing installation of the present invention comprised.Casting mold 1 have the width of regulation sheet glass a pair of relative sidewall 11,11 ', have the bottom 13 on the side's in 2 relative major surfacess of the above-mentioned sheet glass of moulding surface (being called upper surface).To be cast into continuously in the casting mold 1 from nozzle 3 effusive melten glass.Make the glass 2 that is cast into along above-mentioned two sidewalls 11,11 ' from upstream side downstream side unidirectional (forming direction) move continuously shaped flat sheet glass simultaneously.Be cast in the casting mold 1 glass 2 the extension of width by a pair of relative sidewall 11,11 ' limit, be shaped to the sheet glass that possesses with the interval equal wide of a pair of relative sidewall.So that the melten glass liquid level constant mode in the casting mold 1 is come the speed of pulling out of feed glass plate and from the flow of nozzle 3 effusive melten glass, thereby can stably mold the sheet glass of required thickness of slab.
In the casting mold of manufacturing installation of the present invention, also there is the block 12 be equivalent to patent documentation 1 disclosed stop part, in the position relative, promptly observe the casting mold peristome (not shown) that is provided with the sheet glass of pulling out moulding at forming direction from block 12 with block 12.
Fig. 2 illustrates the A-A vertical section of Fig. 1, and Fig. 5 illustrates the A-A vertical section of Fig. 4.The upper surface of the bottom 13 of casting mold 1 is smooth and level and smooth face.Be provided with a plurality of holes 14 of extending with the mode of almost parallel each other on the bottom 13 at width.Carry out the part cooling through desired location, thereby promote the cooling of bottom partly each internal surface of hole.And the quantity in the hole shown in the figure is 6, yet the quantity in hole can for example suitably be set in 2～10 scope.Can also make the quantity in hole surpass 10 as required.
As stated; Carry out being cast into and flat moulding of melten glass simultaneously promoting the zone to carry out local refrigerative to cooling, above-mentioned cooling promote zone be under the nozzle 3 of upper surface when overlooking the upper surface of observing bottom 13 the position and under the nozzle 3 position towards the zone with roughly the same width of forming direction extension.Therefore in the cooling of bottom 13; Can use inside to have the but stream crossed of medium flow and have the heat-eliminating medium supply-pipe 4 (Fig. 1) that sprays the ejiction opening 41 of above-mentioned heat-eliminating medium to the side of cooling, or use and have the heat-eliminating medium supply-pipe 5 (Fig. 4) that sprays the ejiction opening 51 of above-mentioned heat-eliminating medium to the side.So that ejiction opening 41 (51) inserts heat-eliminating medium supply-pipe 4 (5) in the hole 14 of bottom 13 of casting molds 1 (referring to Fig. 2,5) towards the mode of top (direction of the upper surface of bottom 13).If make heat-eliminating medium flow through heat-eliminating medium supply-pipe 4, then heat-eliminating medium can be from ejiction opening 41 (51) ejections, are injected into the internal surface in the hole 14 relative with ejiction opening 41 (51).Upper surface by the internal surface in the hole 14 of shower cooling medium and bottom 13 is relative, and the position that only disposes ejiction opening 41 (51) is cooled, and the zone that comprises this position is cooled off exactly and promoted the zone.And strict, the cooling that zone that ejiction opening distributed in the bottom and the zone that can receive the cooling performance that the heat-eliminating medium ejection from ejiction opening brings through thermal conduction are equivalent to the bottom promotes the zone.
A plurality of above-mentioned through holes and above-mentioned heat-eliminating medium supply-pipe can as above be set, and a plurality of heat-eliminating medium supply-pipes can have the ejiction opening of same number each other, perhaps have the ejiction opening of different numbers each other.
Under the situation of a plurality of heat-eliminating medium supply-pipes that adopt the ejiction opening that has same number each other (the 1st embodiment), can with the cooling setpoint at each position that is provided with the heat-eliminating medium supply-pipe identical conditions.In addition, under the situation of a plurality of heat-eliminating medium supply-pipes that adopt the ejiction opening that has different numbers each other (the 2nd embodiment), can with the cooling setpoint at each position that is provided with the heat-eliminating medium supply-pipe cooling conditions corresponding with condition of molding.Have each other when a plurality of heat-eliminating medium supply-pipes under the situation of ejiction opening of different numbers, can make the number of ejiction opening increase towards forming direction.This point can be explained in the back.
(the 1st embodiment)
Under the situation of a plurality of heat-eliminating medium supply-pipes that adopt the ejiction opening have same number each other, as shown in Figure 1, be arranged at the shape, size of the ejiction opening 41 of each heat-eliminating medium supply-pipe 4, at interval, arrangement and quantity can equate.So just can make cooled region have roughly the same width towards downstream.Fig. 1 representes the example with 4 ejiction openings 41,3 heat-eliminating medium supply-pipes 4 that the mode of (direction of the upper surface of bottom 13) is arranged in parallel towards the top.And Fig. 2 and Fig. 3 represent the state in 3 holes 14 of 3 heat-eliminating medium supply-pipes, 4 insertions.Can come suitably to select the quantity of ejiction opening 41 according to cooled region.Many heat-eliminating medium supply-pipes 4 are inserted in the hole 14 of casting molds bottom 13, dispose respectively and manage so that be arranged at the ejiction opening mode consistent of the central authorities in a plurality of ejiction openings of each heat-eliminating medium supply-pipe with the center of the width of casting mold.Can consider that cooling promotes regional position size suitably to confirm the quantity of heat-eliminating medium supply-pipe 4 and the position is set.
Cooling promotes the position in zone to do, if with position to start with, the position under the nozzle, then the position under the nozzle towards certain position of forming direction as the final position.Can consider the suitably definite final position of the state of cooling of the glass of moulding.Particularly, preferably glass temperature is in position in Tg-100 ℃ of glass tansition temperatures～Tg+100 ℃ the scope as the final position.In addition; According to not being fused to the scope of casting mold and preventing owing to the bad viewpoint that causes uneven thickness, appearance to produce the concavo-convex of inequality and crack that extends to the inner folding line of glass, glass surface; Set in cooling and promote that region memory is suitable in the scope that the lower glass surface temperature is cooled to softening temperature～softening temperature-200 ℃, preferably be cooled to the scope of softening temperature-30 ℃～softening temperature-100 ℃.And what confirm the thickness shape is the softening temperature benchmark, and definite warped shapes is the Tg benchmark.The intensity of its plate glass of sheet glass that thickness is bigger is bigger, thereby is difficult to produce warpage, otherwise is easy to produce temperature head (especially at thickness direction), therefore is easy to produce crack and crackle.In order to address this is that, preferably finish the cooling of plate glass with the temperature higher than glass tansition temperatures Tg.
In addition; Because the bad viewpoint that causes uneven thickness, uneven concavo-convex and crackle occurs producing that extends, make cooling promote that the width in zone is that 5～40% scope of upper surface width is suitable according in the scope that arrives the width end, preventing to the inner folding line of glass, glass surface.Preferably cooling promotes that the width in zone is 10～30% a scope of upper surface width, is more preferably 10～25% scope.
Fig. 2 representes heat-eliminating medium supply-pipe 4 is inserted the state in the hole 14 that is disposed at bottom 13, and the cross-sectional shape of heat-eliminating medium supply-pipe 4 shown here is semicircular, and circular arc portion is towards the below, and the par that is provided with ejiction opening 41 is towards the top.Wherein, The cross-sectional shape of heat-eliminating medium supply-pipe 4 is not limited to semicircle; So long as be provided with ejiction opening 41, and get final product, be not limited to foregoing from the structure that the heat-eliminating medium of ejiction opening 41 ejections can be discharged to the outside via the gap between the internal surface in heat-eliminating medium supply-pipe 4 and hole 14.Except semicircle, for example can also enumerate tetragon or trilateral etc.
The heat-eliminating medium that provides from the outside and passed through the inside of heat-eliminating medium supply-pipe 4 is ejected by the internal surface of ejiction opening 41 to the hole 14 of bottom 13; Near the top of the above-mentioned hole of powerful cooling 41 internal surfaces, be discharged to bottom external through formed gap between hole 14 and heat-eliminating medium supply-pipe 4.Through taking this structure, also can be partly in the part that is provided with hole 14 of bottom 13 and optionally improve near the cooling intensity the ejiction opening.And then foraminous is established partly than there be not foraminous partitive case other places to promote cooling in the bottom.Use the casting mold 1 and heat-eliminating medium supply-pipe 4 shown in above-mentioned, select the position in the hole 14 of bottom 13, the allocation position of ejiction opening 41, thereby the cooling promotion that can freely set bottom 13 is regional.In addition, both can carry out the supply of heat-eliminating medium, also can carry out the supply of heat-eliminating medium from two end sides to heat-eliminating medium supply-pipe 4 from an end side of heat-eliminating medium supply-pipe 4 to heat-eliminating medium supply-pipe 4.Provide under the situation of heat-eliminating medium from an end side, can another terminal blockade be got up.Provide under the situation of heat-eliminating medium from two end sides, from equably part about cooling promotion zone being carried out the refrigerative viewpoint, it is suitable to two end sides heat-eliminating medium being provided with uniform pressure.Perhaps also can block two ends of heat-eliminating medium supply-pipe 4, connect the supply-pipe of the heat-eliminating medium of setting in addition, in heat-eliminating medium supply-pipe 4, supply with heat-eliminating medium at central part.In this case, the supply-pipe of heat-eliminating medium is also in heat-eliminating medium supply-pipe 4 is inserted into hole 14.
Fig. 3 representes that the cooling of overlooking Fig. 1, casting mold shown in 2 when observing promotes the zone.Wherein, the quantity of the ejiction opening 41 of heat-eliminating medium supply-pipe 4 shown in Figure 3 is 7.Cooling promotion zone comprises the position under the nozzle, has roughly the same width towards downstream.Thinner thickness when sheet glass to be formed; Under the less situation of the flow of the effusive melten glass of nozzle; Along with towards downstream, promptly move and whole enlarge at width at forming direction, and the part that the bottom contacts with high temp glass is along with before forming direction and then have a roughly the same width from the effusive high-temperature fusion glass of nozzle.So; Through this scope is regional as the cooling promotion of bottom; Thereby the part that contacts with high temp glass of cooling sole reliably; And can not promote the zone outside the zone exceedingly to strengthen cooling intensity to cooling, therefore can effectively prevent to produce the folding line of glass, not homogenizing, the crackle of tree line.
And then, since can optionally promote through with contacting of glass by the cooling of the part of intense heating, therefore can reduce the temperature distribution of bottom integrated, can prevent the problems such as reduction of deformation of bottom and the sheet glass flatness of following this distortion appearance.
According to can make sheet glass in the temperature distribution of width about the central position symmetry and can keep inhomogeneity viewpoint; Make to promote the upper surface cooled zones, and to be symmetrical set about the imaginary line that extends towards forming direction be suitable through the position under the nozzle.For this reason, the configuration of ejiction opening 41 preferably about the medullary ray symmetry of casting mold width, so just can be carried out the cooling of bottom about the medullary ray of width symmetrically.The nozzle of the middle upper part of melten glass between the pair of sidewalls that is disposed at casting mold is flow to carry out being cast into of melten glass the casting mold.Therefore, sheet glass is symmetric about the width central position in the temperature distribution of width basically, therefore can under the situation that does not make its symmetry forfeiture, cool off according to aforesaid method.In addition, can also append the ground emphasis to the part under the nozzle of bottom and carry out the brute force cooling.
As heat-eliminating medium, get final product so long as be used for carrying out the fluid of heat exchange with the bottom, do not do special qualification, yet based on being easy to obtain and the less and less reason of adjustment resolution of specific heat preferred using gas, especially air or nitrogen etc.
Cooling promotes the cooling intensity in zone preferably can linear be reflected in increase, the minimizing of the feed rate of heat-eliminating medium.Therefore; Under the situation of the ejiction opening that has a plurality of heat-eliminating mediums in the structure of using heat-eliminating medium; If ejiction opening with cool off object, promptly with the distance of bottom according to the hole and different; Even then the identical cooling performance of the flow of heat-eliminating medium also can be different, therefore in order to come controlled chilling intensity through the size of change ejiction opening, preferably make internal surface of hole and ejiction opening apart from homogeneous.For example shown in Figure 2, preferably make the cross-sectional shape of each heat-eliminating medium supply-pipe consistent, and make the direction of ejiction opening of each heat-eliminating medium supply-pipe consistent so that ejiction opening towards constant in each heat-eliminating medium supply-pipe.
Because glass to be formed can not produce local deformaton on the width cross section, therefore preferably cool off with the mode that (through exerting an influence to glass for a long time) thermal shocking portion do not occur at the specific position of width.Especially among the moulding of thin sheet glass; Because the intensity of sheet glass itself is little; Because speed of cooling difference that the place caused and easily deformable, therefore this have the distortion that the situation of cooling distinguished point (line) can produce xsect at the width specific position, thereby not preferred.When using the heat-eliminating medium supply-pipe 4 that spot distribution is had the ejiction opening 41 shown in Fig. 1～3 to be inserted under the situation of the casting mold in 13 the hole 14, bottom in the present invention; Can also heat-eliminating medium only be supplied to desired location reliably with low discharge with the cooling position of bottom 13 being set at less area in upper surface from the heat-eliminating medium of ejiction opening 41.Therefore be difficult to produce this thermal shocking portion, thereby even thin sheet glass also can prevent the generation of being out of shape.And then; Because the direction of insertion of heat-eliminating medium supply-pipe 4 is with respect to the forming direction direction that meets at right angles; Therefore compare abundant weak point through " time of be affected (cooling promotes) " of the glass on this ejiction opening 41 with the hole of the hollow that is parallel to forming direction; Even near ejiction opening 41, there is thermal shocking portion, also be difficult to the distortion that causes that glass itself is bigger.
(the 2nd embodiment)
Under the situation of a plurality of heat-eliminating medium supply-pipes that adopt the ejiction opening that has different numbers each other; Though be arranged at shape, the size and equal at interval of the ejiction opening 51 of each heat-eliminating medium supply-pipe 5; Yet quantity about ejiction opening 51; The quantity of 5 ejiction openings 51 of heat-eliminating medium supply-pipe that but can be positioned at downstream is many more, so that cooling promotes the width in zone to increase intermittently or continuously towards downstream.Fig. 4 representes to be arranged at 6 heat-eliminating medium supply-pipes 5 that the mode of lateral ejiction opening 51 towards the top is arranged in parallel.Side at the pipe on the left side of 6 heat-eliminating medium supply-pipes equally spaced is provided with ejiction opening 51 at 5 positions.About the quantity of ejiction opening, the adjacent pipe pipe more adjacent than the left side in right side increases by 2 successively respectively, and from pipe with above-mentioned 5 ejiction openings to the right, ejiction opening quantity is followed successively by 7,9,11,13,15.And then Fig. 5 and Fig. 6 represent the state in 6 holes 14 of 6 heat-eliminating medium supply-pipes, 5 insertions.Can come suitably to select the quantity of ejiction opening 51 according to cooled region.Many heat-eliminating medium supply-pipes 5 are inserted in the hole 14 of casting mold bottom 13, dispose each pipe so that be arranged at the ejiction opening of the central authorities in a plurality of ejiction openings in each the heat-eliminating medium supply-pipe mode consistent with the center of the width of casting mold.So just can make the cooling of extending promote the width in zone to increase intermittently or continuously towards downstream at forming direction.The quantity that the size that can consider to cool off the position that promotes the zone suitably confirms heat-eliminating medium supply-pipe 5 with the position is set.Be arranged at the not restriction of quantity of the ejiction opening of each heat-eliminating medium supply-pipe, as long as the width of cooled region is increased towards downstream.
If the position that cooling promotes the zone is with position to start with, the position under the nozzle, then the position under the nozzle towards certain position of forming direction as the final position.Can consider the suitably definite final position of the state of cooling of glass to be formed.Particularly, preferably glass temperature is in Tg-100 ℃ of glass tansition temperatures～Tg+100 ℃ the position of scope as the final position.In addition; According to not being fused to the scope of casting mold and preventing because the bad viewpoint that causes uneven thickness, the warpage of uneven concavo-convex and crackle and generation width occurs producing of extension to the inner folding line of glass, glass surface; Set in cooling and promote region memory to be cooled to the scope of softening temperature～softening temperature-300 ℃ in the temperature with lower glass surface, the scope that preferably is cooled to softening temperature-30 ℃～softening temperature-200 ℃ is suitable.And what confirm the thickness shape is the softening temperature benchmark, and definite warped shapes is the Tg benchmark.The intensity of its plate glass of sheet glass that thickness is bigger is big, thereby is difficult to produce warpage, otherwise is easy to produce temperature head (especially at thickness direction), therefore is easy to produce split Feng and crackle.In order to address this is that, preferably finish the cooling of plate glass with the temperature higher than glass tansition temperatures Tg.
In addition; Be in the scope that is not fused to casting mold and prevent because the bad viewpoint that causes uneven thickness, uneven concavo-convex and crackle occurs producing to the inner folding line of glass, glass surface that extends according to making, 10～80% scope for the upper surface width is suitable at the place, starting position to make width that cooling promotes the zone.The width that the cooling at starting position place promotes the zone is 15～70% scope of upper surface width preferably, is more preferably 15～60% scope.According to the viewpoint of the warpage that prevents to produce width, the width that preferred cooling promotes the zone is 60～90% scope of upper surface width at the place, final position.And then the cooling at starting position place promotes that ratio (final/beginning) that the cooling at width and the place, final position in zone promotes the width in zone for example can be in 2～30 scope, preferably in 4～15 scope.
Fig. 5 representes heat-eliminating medium supply-pipe 5 is inserted the state in the hole 14 that is disposed at bottom 13, and the cross-sectional shape of heat-eliminating medium supply-pipe 5 shown here is semicircular, and circular arc portion is towards the below, and the par that is provided with ejiction opening 51 is towards the top.Wherein, The cross-sectional shape of heat-eliminating medium supply-pipe 5 is not limited to semicircle; So long as be provided with ejiction opening 51, and get final product, be not limited to above-mentioned shape from the structure that the heat-eliminating medium of ejiction opening 51 ejections can be discharged to the outside via the gap between the internal surface in heat-eliminating medium supply-pipe 5 and hole 14.Except semicircle, for example can also enumerate tetragon or trilateral etc.
Provide from the outside and passed through heat-eliminating medium supply-pipe 5 inner heat-eliminating mediums and be ejected by the internal surface of ejiction opening 51 to the hole 14 of bottom 13; Near the top of the above-mentioned hole of powerful cooling 51 internal surfaces, be discharged to bottom external through formed gap between hole 14 and heat-eliminating medium supply-pipe 5.Through taking this structure, even the part that is provided with hole 14 of bottom 13 also can be partly and optionally improved near the cooling intensity the ejiction opening.And then the bottom is established foraminous and is partly compared and there be not foraminous partitive case other places to improve cooling.Use the casting mold 1 and heat-eliminating medium supply-pipe 5 shown in above-mentioned, select the position in the hole 14 of bottom 13, the allocation position of ejiction opening 51, thereby the cooling promotion that can freely set bottom 13 is regional.In addition, both can carry out the supply of heat-eliminating medium, also can carry out the supply of heat-eliminating medium from two end sides to heat-eliminating medium supply-pipe 5 from an end side of heat-eliminating medium supply-pipe 5 to heat-eliminating medium supply-pipe 5.Provide under the situation of heat-eliminating medium from an end side, can another terminal blockade be got up.Provide under the situation of heat-eliminating medium from two end sides, from equably part about cooling promotion zone being carried out the refrigerative viewpoint, it is suitable to two end sides heat-eliminating medium being provided with uniform pressure.Perhaps also can block two ends of heat-eliminating medium supply-pipe 5, connect the supply-pipe of the heat-eliminating medium of setting in addition, in heat-eliminating medium supply-pipe 5, supply with heat-eliminating medium at central part.In this case, the supply-pipe of heat-eliminating medium is also in heat-eliminating medium supply-pipe 5 is inserted into hole 14.
Fig. 6 representes to overlook Fig. 4 when observing, the cooling shown in 5 in the casting mold promotes the zone.Cooling promotion zone comprises the position under the nozzle, increases intermittently or continuously along with play width towards downstream.When the big and thinner thickness of the width of sheet glass to be formed; Under the more situation of the flow of the effusive melten glass of nozzle; Along with towards downstream, promptly move and whole enlarge at width at forming direction, and the part that contacts with high temp glass of bottom is along with also on width, enlarging advancing on the forming direction from the effusive high-temperature fusion glass of nozzle.So; Through this scope is regional as the cooling promotion of bottom; Thereby the part that contacts with high temp glass of cooling sole reliably; And can not promote the zone outside the zone excessively to strengthen cooling intensity to cooling, therefore can effectively prevent to produce the folding line of glass, not homogenizing, the crackle of tree line.
And then, since can optionally promote through with contacting of glass by the cooling of the part of intense heating, therefore can reduce the temperature distribution of bottom integrated, can prevent the problems such as reduction of deformation of bottom and the sheet glass flatness of following this distortion appearance.
According to can make sheet glass in the temperature distribution of width about the central position symmetry and can keep inhomogeneity viewpoint; Make to promote the upper surface cooled zones, and to be symmetrical set about the imaginary line that extends towards forming direction be suitable through the position under the nozzle.For this reason, the configuration of ejiction opening 51 preferably about the medullary ray symmetry of casting mold width, so just can be carried out the cooling of bottom about the medullary ray of width symmetrically.The nozzle of the middle upper part of melten glass between the pair of sidewalls that is disposed at casting mold is flow to carry out being cast into of melten glass the casting mold.Therefore, sheet glass is symmetric about the width central position in the temperature distribution of width basically, therefore can under the situation that does not make its symmetry forfeiture, cool off according to aforesaid method.In addition, can also append the ground emphasis to the part under the nozzle of bottom and carry out the brute force cooling.
As heat-eliminating medium, get final product so long as be used for carrying out the fluid of heat exchange with the bottom, do not do special qualification, yet based on being easy to obtain and the less and less reason of adjustment resolution of specific heat preferred using gas, especially air or nitrogen etc.
Cooling promotes the cooling intensity in zone preferably can linear be reflected in increase, the minimizing of the feed rate of heat-eliminating medium.Therefore; Under the situation of the ejiction opening that has a plurality of heat-eliminating mediums in the structure of using heat-eliminating medium; If ejiction opening with cool off object, promptly with the distance of bottom according to the hole and different; Even then the identical cooling performance of the flow of heat-eliminating medium also can be different, therefore in order to come controlled chilling intensity through the size of change ejiction opening, preferably make internal surface of hole and ejiction opening apart from homogeneous.For example shown in Figure 5, preferably make the cross-sectional shape of each heat-eliminating medium supply-pipe consistent, and make the direction of ejiction opening of each heat-eliminating medium supply-pipe consistent so that ejiction opening towards constant in each heat-eliminating medium supply-pipe.
Because glass to be formed can not produce local deformaton on the cross section of width, therefore preferably cool off with the mode that (through exerting an influence to glass for a long time) thermal shocking portion do not occur at the specific position of width.Especially among the moulding of thin sheet glass; Because the intensity of sheet glass itself is little; Because speed of cooling difference that the place caused and easily deformable, therefore this have the distortion that the situation of cooling distinguished point (line) can produce xsect in the width specific location, thereby not preferred.When using the heat-eliminating medium supply-pipe 5 that spot distribution is had the ejiction opening 51 shown in Fig. 4～6 to be inserted under the situation of the casting mold in 13 the hole 14, bottom in the present invention; Can also can to desired location required amount of cooling water be provided reliably with the cooling position of bottom 13 being set at less area in upper surface from the heat-eliminating medium of ejiction opening 51 through the flow of controlled chilling medium.Therefore be difficult to produce this thermal shocking portion, thereby even thin sheet glass also can prevent the generation of being out of shape.And then; Because the direction of insertion of heat-eliminating medium supply-pipe 5 is with respect to the forming direction direction that meets at right angles; Therefore compare abundant weak point through " time of be affected (cooling promotes) " of the glass on this ejiction opening 51 with the hole of the hollow that is parallel to forming direction; Even near ejiction opening 51, there is thermal shocking portion, also be difficult to the distortion that causes that glass itself is bigger.
[method of manufacture of sheet glass (first aspect present invention)]
The method of manufacture of the sheet glass of the present invention the 1st aspect is to use the method for above-mentioned sheet glass manufacturing installation.Method of manufacture of the present invention has: confirm to be disposed at quantity and the number of the ejiction opening that allocation position, heat-eliminating medium supply-pipe have of the heat-eliminating medium supply-pipe of manufacturing installation, prepare the operation of manufacturing installation; And will be cast into continuously in the casting mold of ready manufacturing installation from the effusive melten glass of nozzle, make the glass that is cast into along above-mentioned two sidewalls from upstream side downstream side unidirectional (forming direction) move the operation of continuously shaped flat sheet glass simultaneously.And then; Carry out being cast into flat moulding of above-mentioned melten glass simultaneously and bow following zone (be called cooling promote zone) being carried out local refrigerative, aforementioned region is to overlook position and the position under the said nozzle under the said nozzle of above-mentioned upper surface when observing above-mentioned upper surface along zone that forming direction extends.
In the method for manufacture of first aspect of the present invention; Before making sheet glass; Use above-mentioned sheet glass manufacturing installation; Can be according to the kind and the condition of molding of glass to be formed, be arranged at the through hole of casting mold bottom quantity and position, be inserted into quantity and the quantity of the ejiction opening that position, each heat-eliminating medium supply-pipe possess of the heat-eliminating medium supply-pipe of through hole.
These conditions are broadly divided into the thinner thickness of the width of sheet glass to be formed sheet glass bigger and to be formed, from the less situation of the flow of the effusive melten glass of nozzle (embodiment A) and from the more situation of the flow of the effusive melten glass of nozzle (embodiment B).Under the situation of embodiment A, the number of quantity and the ejiction opening that allocation position, heat-eliminating medium supply-pipe have that is disposed at the heat-eliminating medium supply-pipe of manufacturing installation preferably is determined to be and makes above-mentioned cooling promote the zone to extend and have a roughly the same width towards forming direction.Can use the manufacturing installation of above-mentioned the 1st embodiment in this case.Under the situation of embodiment B, the number of quantity and the ejiction opening that allocation position, heat-eliminating medium supply-pipe have that is disposed at the heat-eliminating medium supply-pipe of manufacturing installation preferably is determined to be and makes above-mentioned cooling promote the zone to extend and width increases intermittently or continuously towards forming direction.Can use the manufacturing installation of above-mentioned the 2nd embodiment in this case.
(embodiment A)
Under the situation of embodiment A, even also can obtain desired effects from the flow of the effusive melten glass of nozzle is less.The situation that sheet thickness to be formed is thin for example refer to width more than or equal to 100mm, be preferably greater than equal 150mm, more preferably in the scope of 200～300mm; Thickness is at 6～30mm, preferably in the scope of 6～20mm, width/thickness in 3～50 scope, be preferably 5～40, the scope of 10-40 more preferably.For example can be in the scope of 20～140mL/min from the flow of the effusive melten glass of nozzle, preferably be in the scope of 30～120mL/min, more preferably the scope of 30～80mL/min.
(embodiment B)
Under the situation of embodiment B; Even also can obtain desired effects from the flow of the effusive melten glass of nozzle is more; The situation that the sheet thickness of institute's moulding is thin for example refer to width more than or equal to 100mm, be preferably greater than equal 120mm, more preferably in the scope of 150～300mm; Thickness is at 6～30mm, preferably in the scope of 8～20mm, width/thickness in 3～80 scope, be preferably 5～40, the scope of 10-30 more preferably.For example can surpass 140mL/min from the flow of the effusive melten glass of nozzle, preferably be in the scope of 140～500mL/min, more preferably the scope of 200～800mL/min.
According to glass plate manufacturing method of the present invention and the sheet glass of moulding is drawn out along travel direction from casting mold, for example be transferred in the lehre through travelling belt.Carry out slow cool down in the process that sheet glass passes through in lehre, move to outside the lehre then.Glass mobile in casting mold is as above to carry out through the sheet glass of travelling belt behind the travel direction transfer formation.Sheet glass is inner through in the lehre from casting mold, all is 1 block of plate of successive up to leaving lehre.In the position of from lehre, coming out, sheet glass is cut to suitable length then.As above just can constantly obtain plate glass by 1 sheet glass.The sheet glass that obtains like this can be split into sheet glass and use the glass material as impact briquetting.Details will be described later.
According to the method for manufacture of sheet glass of the present invention, can carry out fusion to the opticglass that is melted, it is flowed out from circle piped nozzle, continuously shaped is the plate shape of homogeneous thickness.In addition; Owing to take to possess flat bottom surface and in the casting mold of the parallel sidewall in above-mentioned bottom surface with being cast into the effusive melten glass of LV (high temperature); Carry out the method for cool quickly moulding, therefore can also be applied to be easy to the opticglass of devitrifying.In this forming method; If belong under the situation of embodiment A; Then lifting capacity (time per unit is from the volume of the effusive melten glass of nozzle) is about 20mL/min～140mL/min as stated, belongs to that lifting capacity surpasses 140mL/min under the situation of embodiment B.
[method of manufacture of sheet glass (second aspect present invention)]
The method of manufacture of the sheet glass of second aspect present invention will be cast in the casting mold from the effusive melten glass of nozzle continuously; This casting mold has a pair of relative sidewall and the bottom with face (upper surface) of the side in 2 relative major surfacess of the above-mentioned sheet glass of moulding of the width of regulation sheet glass; Make the glass that is cast into along above-mentioned two sidewalls from upstream side downstream side unidirectional (being called forming direction) move continuously shaped flat sheet glass simultaneously.And in the method for manufacture of this sheet glass; Carry out being cast into and flat moulding of above-mentioned melten glass simultaneously following zone being carried out local refrigerative, aforementioned region is roughly the same width is extended and have in position and the position under the said nozzle under the said nozzle of overlooking above-mentioned upper surface when observing above-mentioned upper surface towards forming direction zone.
About the used casting mold of the method for manufacture of second aspect present invention; As stated; So long as can extend and zone with roughly the same width is carried out local refrigerative structure and got final product towards forming direction, do not do special restriction to the position under the nozzle of upper surface and the position under the nozzle.
The casting mold that can be used in the method for manufacture of second aspect present invention for example can constitute; The bottom of above-mentioned casting mold have in inside with above-mentioned sidewall approximate vertical and with at least 2 through holes of upper surface almost parallel; In the above-mentioned through hole one is equipped on the position under the nozzle; Remaining at least 1 through hole is equipped on the position, downstream side under the nozzle; Above-mentioned through hole has opening in the side that links to each other with outer side above-mentioned sidewall the bottom; Have at least 1 ejiction opening that is used for to side ejection heat-eliminating medium in above-mentioned each through hole, and the heat-eliminating medium supply-pipe has the heat-eliminating medium that can make from above-mentioned ejiction opening ejection and flow to size and/or shape outside the through hole from above-mentioned opening, and the heat-eliminating medium supply-pipe is configured to make in the above-mentioned ejiction opening at least one to be positioned at through hole; Inner through heat-eliminating medium being imported the above-mentioned heat-eliminating medium supply-pipe that is disposed in the above-mentioned through hole; From above-mentioned ejiction opening ejection heat-eliminating medium, near the upper surface the above-mentioned ejiction opening is cooled off, carry out the cooling of aforementioned region.
The method of manufacture of the sheet glass of second aspect present invention can use first embodiment (a plurality of heat-eliminating medium supply-pipes have the situation of the ejiction opening of same number each other) of the manufacturing installation of the invention described above to implement.Therefore; Though Fig. 1 for overlooking the synoptic diagram of observation as the casting mold 1 of an example of the casting mold that manufacturing installation of the present invention comprised, also is to overlook the synoptic diagram of observation as the casting mold 1 of an example of employed casting mold in the method for manufacture of second aspect present invention as stated simultaneously.Therefore, the explanation of the device in first embodiment of the manufacturing installation of the present invention explanation that can be used as device used in the method for manufacture of sheet glass of second aspect present invention comes reference.
The method of manufacture of second aspect present invention can be at the thinner thickness of the width of sheet glass to be formed sheet glass bigger and to be formed, under the less situation of the flow of the effusive melten glass of nozzle; Obtain desired effects; The situation of the thinner thickness of sheet glass to be formed for example refer to width more than or equal to 100mm, be preferably greater than equal 150mm, more preferably in the scope of 200～300mm; Thickness is at 6～30mm, preferably in the scope of 6～20mm, width/thickness in 3～50 scope, be preferably 5～40, the scope of 10-40 more preferably.For example can be in the scope of 20～140mL/min from the flow of the effusive melten glass of nozzle, preferably be in the scope of 30～120mL/min, more preferably the scope of 30～80mL/min.
The glass plate manufacturing method according to a second aspect of the invention and sheet glass of moulding is drawn out along travel direction from casting mold for example is transferred in the lehre through travelling belt.Carry out slow cool down in the process that sheet glass passes through in lehre, move to outside the lehre then.Glass mobile in casting mold is as above to carry out through the sheet glass of travelling belt behind the travel direction transfer formation.Sheet glass is inner through in the lehre from casting mold, all is 1 block of plate of successive up to leaving lehre.In the position of from lehre, coming out, sheet glass is cut to suitable length then.As above just can constantly obtain plate glass by 1 sheet glass.The sheet glass that obtains like this can be split into sheet glass and use the glass material as impact briquetting.Details will be described later.
The method of manufacture of sheet glass according to a second aspect of the invention can be carried out fusion to the opticglass that is melted, and it is flowed out from circle piped nozzle, and continuously shaped is the plate shape of homogeneous thickness.In addition; Owing to take to possess flat bottom surface and in the casting mold of the parallel sidewall in above-mentioned bottom surface with being cast into the effusive melten glass of LV (high temperature); Carry out the method for cool quickly moulding, therefore can also be applied to be easy to the opticglass of devitrifying.In this forming method, lifting capacity (time per unit is from the volume of the effusive melten glass of nozzle) is preferably about 20mL/min～140mL/min as stated.
[method of manufacture of sheet glass (third aspect present invention)]
The method of manufacture of the sheet glass of third aspect present invention will be cast in the casting mold from the effusive melten glass of nozzle continuously; This casting mold has a pair of relative sidewall and the bottom with face (being called upper surface) of the side in 2 relative major surfacess of the above-mentioned sheet glass of moulding of the width of regulation sheet glass; Make the glass that is cast into along above-mentioned two sidewalls from upstream side downstream side unidirectional (forming direction) move continuously shaped flat sheet glass simultaneously.And in the method for manufacture of sheet glass of the present invention; Carry out being cast into and flat moulding of above-mentioned melten glass simultaneously following zone being carried out local refrigerative, aforementioned region be overlook under the said nozzle of above-mentioned upper surface when observing above-mentioned upper surface position and the position under the said nozzle towards forming direction extend and width along with towards downstream and intermittently or the zone that increases continuously.
About the used casting mold of the method for manufacture of third aspect present invention; As stated; So long as can to the position under the nozzle of upper surface and the position under the nozzle towards forming direction extend and along with towards downstream width intermittently or the zone that increases continuously carry out local refrigerative structure and get final product, do not do special restriction.
The casting mold that can be used for the method for manufacture of third aspect present invention for example can constitute; The bottom of above-mentioned casting mold have in inside with above-mentioned sidewall approximate vertical and with at least 2 through holes of upper surface almost parallel; In the above-mentioned through hole one is equipped on the position under the nozzle; Remaining at least 1 through hole is equipped on the position, downstream side under the nozzle; Above-mentioned through hole has opening in the side that links to each other with outer side above-mentioned sidewall the bottom; Have at least 1 ejiction opening that is used for to side ejection heat-eliminating medium in above-mentioned each through hole, and the heat-eliminating medium supply-pipe has the heat-eliminating medium that can make from above-mentioned ejiction opening ejection and flow to size and/or shape outside the through hole from above-mentioned opening, and the heat-eliminating medium supply-pipe is configured to make in the above-mentioned ejiction opening at least one to be positioned at through hole; Inner through heat-eliminating medium being imported the above-mentioned heat-eliminating medium supply-pipe that is disposed in the above-mentioned through hole; From above-mentioned ejiction opening ejection heat-eliminating medium, near the upper surface the above-mentioned ejiction opening is cooled off, carry out the cooling of aforementioned region.
As stated; In the third aspect present invention; Carry out being cast into and tabular moulding of melten glass simultaneously following zone being carried out local refrigerative, aforementioned region is that extend and along with width is intermittently or the zone that increases continuously towards downstream at forming direction position and the position under the said nozzle overlooked under the said nozzle of above-mentioned upper surface when observing above-mentioned upper surface.Therefore, suitably be specified to the position that make to form under the nozzle to the quantity of the ejiction opening of heat-eliminating medium supply-pipe and configuration intermittently or the local cold zone that increases constantly towards the forming direction width.And then the position that is under the nozzle of casting mold bottom is the position that is provided high-temperature fusion glass, and therefore expectation is fully carried out promoting based on the cooling of heat-eliminating medium.Promptly; Though the width of the position cooled region under nozzle is littler than the width in downstream; But it is preferred can fully carry out based on the promoted mode of the cooling of heat-eliminating medium; Not only confirm the quantity and the configuration of the ejiction opening of heat-eliminating medium supply-pipe, also confirm the size and the temperature that offers the heat-eliminating medium of each heat-eliminating medium supply-pipe, flow, pressure, kind etc. of the ejiction opening of heat-eliminating medium supply-pipe.For example can make the size of the ejiction opening that is disposed at the heat-eliminating medium supply-pipe under the nozzle bigger, optionally increase the spray volume of heat-eliminating medium than the ejiction opening that is disposed at other places.Can also pass through to change according to the place like this size of ejiction opening, or increase the quantity of ejiction opening, to each position control amount of cooling water.
More specifically, amount of cooling water for example according to the temperature of heat-eliminating medium, from the heat-eliminating medium supply-pipe that is arranged at per unit length the ejiction opening ejection heat-eliminating medium spray volume increase and decrease and increase and decrease.If the pressure in the heat-eliminating medium supply-pipe is identical, then the spray volume of heat-eliminating medium depends on the port area summation of the ejiction opening on the heat-eliminating medium supply-pipe that is arranged on per unit length.Based on above each point, as making the amount of cooling water under the nozzle become maximum means, for example can use as follows (1)～in the means of (3) any or use the means more than 2 in the lump.
(1) make the temperature of the heat-eliminating medium that the heat-eliminating medium supply-pipe in the through hole under being disposed at nozzle provides lower than the temperature of the heat-eliminating medium that offers other heat-eliminating medium supply-pipes.
(2) increase the size that is disposed at the ejiction opening under the nozzle of heat-eliminating medium supply-pipe in the through hole be disposed under the nozzle.
(3) increase the quantity (quantity of the per unit length of supply-pipe) that is disposed at the ejiction opening under the nozzle of heat-eliminating medium supply-pipe in the through hole that is disposed under the nozzle.
And then; In order to form under the nozzle position intermittently or the local cold zone that increases continuously towards the forming direction width; Configuration at least about the ejiction opening of heat-eliminating medium supply-pipe in the heat-eliminating medium supply-pipe of the position under being equipped on nozzle, is made as it near the position under the nozzle; And in the heat-eliminating medium supply-pipe that is equipped on downstream; It is made as the whole zone of the width that covers the casting mold upper surface, and in being equipped on the heat-eliminating medium supply-pipe of both midway (more than 1 or 2), it is made as under the nozzle centre with the heat-eliminating medium supply-pipe in downstream.At this moment, the temperature of the heat-eliminating medium that can consider to provide to each heat-eliminating medium supply-pipe and supply pressure etc. suitably confirm to be arranged at the size and the quantity of the ejiction opening of each heat-eliminating medium supply-pipe.
The method of manufacture of the sheet glass of third aspect present invention can use second embodiment (making a plurality of heat-eliminating medium supply-pipes have the situation of the ejiction opening of different numbers each other) of the manufacturing installation of the invention described above to implement.Therefore; Though Fig. 4 for overlooking the synoptic diagram of observation as the casting mold 1 of an example of the casting mold that manufacturing installation of the present invention comprised, also is to overlook the synoptic diagram of observation as the casting mold 1 of an example of employed casting mold in the method for manufacture of the present invention as stated simultaneously.Therefore, the explanation of the device in second embodiment of the manufacturing installation of the present invention explanation that can be used as device used in the method for manufacture to the sheet glass of third aspect present invention comes reference.
In example shown in Figure 4; Be arranged at shape, the size and equal at interval of the ejiction opening 51 of each heat-eliminating medium supply-pipe 5; And about the quantity of ejiction opening 51; The quantity of 5 ejiction openings 51 of heat-eliminating medium supply-pipe that is positioned at downstream is many more, so that cooling promotes the zone along with width increases intermittently or continuously towards downstream.Wherein, As stated; Position under the nozzle of casting mold bottom is the position that is provided the pyritous melten glass; Therefore preferably fully carry out promoting, and in example shown in Figure 4, preferably make the temperature of the heat-eliminating medium that the heat-eliminating medium supply-pipe in the through hole under being disposed at nozzle provides lower than the temperature of the heat-eliminating medium that offers other heat-eliminating medium supply-pipes based on the cooling of heat-eliminating medium.In addition; About being disposed at the heat-eliminating medium supply-pipe in the through hole under the nozzle; Have different shapes, size and/or interval with the ejiction opening that is arranged at other each heat-eliminating medium supply-pipes, can fully carry out promoting that based on the cooling of heat-eliminating medium this is with aforementioned identical.
The quantity that the size that can consider to cool off the position that promotes the zone suitably confirms heat-eliminating medium supply-pipe 5 with the position is set.Be arranged at the not restriction of ejiction opening quantity of each heat-eliminating medium supply-pipe, as long as the width of cooled region is increased towards downstream.The interval that can also appropriate change be arranged at the ejiction opening 51 of each heat-eliminating medium supply-pipe 5.
The method of manufacture of third aspect present invention can be at the width of sheet glass to be formed big and thinner thickness, under the more situation of the flow of the effusive melten glass of nozzle; Obtain desired effects; The situation that sheet thickness to be formed is thin for example refer to width more than or equal to 100mm, be preferably greater than equal 120mm, more preferably in the scope of 150～300mm; Thickness is at 6～30mm, preferably in the scope of 8～20mm, width/thickness in 3～80 scope, be preferably 5～40, the scope of 10-30 more preferably.For example can surpass 140mL/min from the flow of the effusive melten glass of nozzle, preferably be in the scope of 140～500mL/min, more preferably the scope of 200～800mL/min.
The glass plate manufacturing method according to a third aspect of the invention we and sheet glass of moulding is drawn out along travel direction from casting mold for example is transferred in the lehre through travelling belt.Carry out slow cool down in the process that sheet glass passes through in lehre, move to outside the lehre then.Glass mobile in casting mold is as above to carry out through the sheet glass of travelling belt behind the travel direction transfer formation.Sheet glass is inner through in the lehre from casting mold, all is 1 block of plate of successive up to leaving lehre.In the position of from lehre, coming out, sheet glass is cut to suitable length then.As above just can constantly obtain plate glass by 1 sheet glass.The sheet glass that obtains like this can be split into sheet glass and use the glass material as impact briquetting.Details will be described later.
The method of manufacture of sheet glass according to a third aspect of the invention we can be carried out fusion to the opticglass that is melted, and it is flowed out from circle piped nozzle, and continuously shaped is the plate shape of homogeneous thickness.In addition; Owing to take to possess flat bottom surface and in the casting mold of the parallel sidewall in above-mentioned bottom surface with being cast into the effusive melten glass of LV (high temperature); Carry out the method for cool quickly moulding, therefore can also be applied to be easy to the opticglass of devitrifying.In this forming method, lifting capacity (time per unit is from the volume of the effusive melten glass of nozzle) is preferably about 140mL/min～600mL/min.
The main application of the sheet glass that produces to the glass plate manufacturing method of the third aspect through the present invention first is in order to obtain the midbody of the glass material that impact briquetting uses.That is, the sheet glass that produces cuts off and after being called dice shape small pieces like the said quilt in back in length and breadth, through chamfering and being used for the barreling operation of weight adjustment and can be used as impact briquetting and use material.The impact briquetting that is obtained through heating, softening and carry out impact briquetting, is perhaps implemented grinding, attrition process to the article after the impact briquetting with material, thereby can be used as optics such as lens etc.
Among this purposes, if the uneven thickness of sheet glass material, then in order to reduce as the deviation of weight of impact briquetting with the small pieces of material; Just must change the cut-out width according to the thickness at its position, this not only requires very complicated span adjustment operation, under situation about can't revise fully well through the adjustment of cutting off width; The meeting waste material; Or because the long period is carried out barreling processing and further the generation carried out the needs that weight is adjusted, so the non-constant of production efficiency, become the reason that cost rises; And according to the present invention; Owing to can make sheet thickness even, even therefore cut apart the cut-out sheet glass through certain cut-out width, the situation that the deviation of weight of the sheet glass that also can suppress to be cut off increases.
[impact briquetting is with the method for manufacture of glass material]
The invention still further relates to and be used to heat, soften and carry out the method for manufacture of stamping forming impact briquetting with the glass material.Impact briquetting of the present invention with the method for manufacture of glass material comprise through the invention described above the 1st to the 3rd in the method for arbitrary aspect in the aspect make sheet glass; Cut apart above-mentioned sheet glass and make a plurality of sheet glass (glass section), processing steps is carried out in above-mentioned section.The processing of section for example is attrition process.Sheet glass is implemented attrition process acquisition impact briquetting use the glass material.
Explanation impact briquetting of the present invention is with the concrete mode of the method for manufacture of glass material below.
The sheet glass that obtains as as illustrated before this, being cut off by the end with the sheet glass that is provided is partitioned into the method for sheet glass (being known as section); The position that can use the process of chopping of using diamond wheel, scroll saw, emery wheel etc., hope is cut apart is implemented line and is processed to form line, and sheet glass is exerted pressure makes that fracture is extended with the method for cutting off glass from line etc.Through the sheet glass of as above cutting apart is implemented attrition process such as barreling, use the glass material thereby can obtain impact briquetting.
First the method for manufacture according to the present invention to the sheet glass of the third aspect; The difference that can obtain two ends and central portion thickness is few, the uniform sheet glass of thickness; If the interval that cuts off is in length and breadth equated; Then can be consistent at the volume that makes section to a certain degree, even the deviation of weight that width also can suppress to cut into slices is not cut off in each place of incision adjustment.Therefore, owing to make weight, volume of each section consistent, thereby can reduce the amount of the glass that must remove through barreling, can shorten again barreling process period, realize saving resource and energy.Section implemented to chamfer usually, form impact briquetting in order to the barreling of further minimizing deviation of weight uses material.Be formed at the concavo-convex of sheet glass upper surface through slight removal of above-mentioned attrition process; Thereby can obtain the roughly level and smooth impact briquetting in surface and use the glass material; Even if yet residual have some concavo-convex; The grinding so long as can be expert at, attrition process become the degree of depth of the stage removal of lens, are no problem as section then.
[method of manufacture of optics]
The present invention comprises through the glass material being heated, softens and carry out stamping forming operation, the method for manufacture of making the optical element of glass optical element.Present method is to make impact briquetting through the method for the invention described above to use the glass material, and above-mentioned glass material is heated, softens and carry out stamping forming method.
The first aspect of the method for manufacture of optics of the present invention is that impact briquetting is heated and carried out in the impact briquetting of producing with the method for manufacture of glass material through impact briquetting of the present invention with the glass material, thereby obtains the optics method of manufacture of optics.This mode is the mode that obtains optics through so-called precise punch forming.In precise punch forming, in non-oxidizing atmosphere, impact briquetting being heated to material usually becomes 10 5～10 8The temperature of viscosity of pool (poise) is carried out impact briquetting through forming mould, and the shape of the molding surface of forming mould is critically transfer printing molded to glass.The manufacturing press-molded products that obtains like this has higher form accuracy, can be directly as opticses such as lens.
The second aspect of the method for manufacture of optics of the present invention is impact briquetting to be heated and carried out in the impact briquetting of producing with the method for manufacture of glass material through impact briquetting of the present invention process the glass ware forming article with the glass material, thereby these glass ware forming article are implemented the optics method of manufacture of grinding and/or grinding step acquisition optics.In this mode, after impact briquetting, obtain optics through grinding, grinding.In this method of manufacture, in atmosphere, impact briquetting being heated to the glass material usually becomes 10 4～10 6The temperature of the viscosity about pool is carried out impact briquetting through forming mould.In the impact briquetting of said temperature scope, obtain and glass ware forming article as the shape approximation of the glass article of target, implement grinding, attrition process then, can for example accomplish the optics of the form accuracy of having relatively high expectations such as lens.
By this method, can make opticses such as non-spherical lens, transparent lens, lens arra, micro lens, diffraction grating, prism with higher productivity.Can also form optical multilayers such as antireflection film as required in optical component surfaces.
[method of manufacture of sheet glass]
The present invention comprises the method for manufacture of sheet glass.This method is made sheet glass through the method for the invention described above, makes sheet glass through comprising the operation that polishes in being processed in by the sheet glass of making.Polishing processing is known working method, and two major surfacess of sheet glass are ground, and can obtain the smooth sheet glass of desired thickness.
[embodiment]
Further specify the present invention through embodiment below.Wherein, the invention is not restricted to embodiment.
Embodiment 1
Use casting mold shown in Figure 1; To from nozzle with the effusive 1000 ℃ opticglass of flow 60mL/min; To be disposed at 0,30 with 6 cooling tubes that the 8mm spacing has 5 ejiction openings respectively from nozzle location towards forming direction, the position of 60mm; To cooling tube provide 15,10 respectively, the pressurized air of the 0.3MPa of 5L/min implements the bottom cooling; Molding forming width is that 240mm, thickness are the sheet glass of 15mm, and can go out the width thickness difference at the situation compacted under that does not produce folding line is that 0.6mm, warpage are that 0.04mm, the tree line degree of depth are the sheet glass of 0.12mm.
Comparative example 1
Use the disclosed device of Fig. 5 b of patent documentation 1; For the same sheet glass of moulding; The pressurized air of MIN amount of cooling water 0.3MPa that is used to prevent welding of 150L/min is provided to the bottom; The extension of glass as a result is in the part variation near the casting mold sidewall, and the width thickness difference is that 1.5mm, the tree line degree of depth are 3.0mm, is called the sheet glass of shape difference.
Embodiment 2
Use casting mold shown in Figure 4; To from nozzle with the effusive 1100 ℃ opticglass of flow 300mL/min; To be disposed at the position of 0mm, 30mm, 60mm, 90mm, 120mm, 150mm with 6 cooling tubes that the 8mm spacing has 5,7,8,11,13,15 ejiction openings respectively from nozzle location towards forming direction; Provide the pressurized air of the 0.3MPa of 30L/min, 30L/min, 30L/min, 20L/min, 20L/min, 15L/min to implement the bottom cooling respectively to cooling tube; Molding forming width is that 200mm, thickness are the sheet glass of 10mm, and the result can make glass can not be fused to casting mold and not produce that the stable width thickness difference that molds is that 0.2mm, warpage are that 0.05mm, the tree line degree of depth are the sheet glass of 0.04mm under the situation of folding line.
Comparative example 2
Then, use the disclosed device of Fig. 5 b of patent documentation 1,, provide the pressurized air of the 0.3MPa of 700L/min to cool off, make glass flow rate only can increase to 200mL/min owing to being fused to casting mold to the bottom for the sheet glass of the same size of moulding.And the shape of sheet glass warpage occurs at both ends at this moment, and its amount of warpage is 2mm.
The present invention has effect at the production field of opticses such as lens.

Claims (33)

1. the manufacturing installation of a sheet glass, it has casting mold, and this casting mold has: a pair of relative sidewall of the width of regulation sheet glass; And have the bottom of the side in 2 relative major surfacess of above-mentioned sheet glass being carried out the upper surface of moulding, wherein,
Above-mentioned bottom have in inside with above-mentioned sidewall approximate vertical and with at least 2 through holes of upper surface almost parallel, above-mentioned through hole has opening in the side that links to each other with outer side above-mentioned sidewall the bottom,
Above-mentioned manufacturing installation comprises the heat-eliminating medium supply-pipe, and this heat-eliminating medium supply-pipe has at least 1 ejiction opening that is used for to side ejection heat-eliminating medium,
Above-mentioned heat-eliminating medium supply-pipe is configured to can freely come in and go out above-mentioned through hole inside, and in the above-mentioned ejiction opening at least 1 is positioned at through hole,
Above-mentioned heat-eliminating medium supply-pipe has following size and/or shape: under the situation in being disposed at above-mentioned through hole, can make from the heat-eliminating medium of above-mentioned ejiction opening ejection to flow to outside the through hole from above-mentioned opening.
2. the manufacturing installation of sheet glass according to claim 1; Wherein, This manufacturing installation is used for the inner heat-eliminating medium that imports of above-mentioned heat-eliminating medium supply-pipe in being disposed at above-mentioned through hole; From above-mentioned ejiction opening ejection heat-eliminating medium, cool off near the upper surface of above-mentioned ejiction opening, and will be cast into above-mentioned casting mold continuously from the effusive melten glass of nozzle; Make after being cast into glass from the upstream side of forming direction downstream side carry out folk prescription to moving, thereby on the travel direction of above-mentioned glass, above-mentioned sheet glass is carried out moulding.
3. the manufacturing installation of sheet glass according to claim 1 and 2; Wherein, Be provided with a plurality of above-mentioned through holes and above-mentioned heat-eliminating medium supply-pipe, above-mentioned a plurality of heat-eliminating medium supply-pipes have the ejiction opening of same number each other, or have the ejiction opening of different each other numbers.
4. the manufacturing installation of sheet glass according to claim 3, wherein, the ejiction opening that above-mentioned a plurality of heat-eliminating medium supply-pipes have different numbers each other, the number of ejiction opening increases towards forming direction.
5. the manufacturing installation of sheet glass according to claim 1; Wherein, Above-mentioned heat-eliminating medium supply-pipe has the heat-eliminating medium that can make from the ejiction opening ejection and flows to the gap outside the through hole from above-mentioned opening between the internal surface of side with above-mentioned ejiction opening and the above-mentioned through hole relative with this side.
6. the manufacturing installation of sheet glass according to claim 1, wherein, the quantity of above-mentioned through hole and above-mentioned heat-eliminating medium supply-pipe is in 2～10 scope.
7. the manufacturing installation of sheet glass according to claim 1, wherein, the cross-sectional shape of heat-eliminating medium supply-pipe is semicircle, is provided with above-mentioned ejiction opening in semicircular par.
8. the method for manufacture of a sheet glass, it uses the described manufacturing installation of claim 1, and wherein, the method for manufacture of this sheet glass has:
Confirm to be disposed at the quantity of the heat-eliminating medium supply-pipe in the manufacturing installation and the number of the ejiction opening that allocation position, heat-eliminating medium supply-pipe have, prepare the operation of manufacturing installation; And
To be cast into continuously in the casting mold of ready manufacturing installation from the effusive melten glass of nozzle, side is unidirectional downstream moves from the upstream side of forming direction to make the glass that is cast into along above-mentioned two sidewalls, the operation of continuously flat sheet glass being carried out moulding simultaneously,
Be cast into and the flat moulding of above-mentioned melten glass are carried out promoting the zone to carry out local refrigerative to cooling simultaneously, and above-mentioned cooling promotes that zone is that position and the position under the said nozzle under the said nozzle of overlooking above-mentioned upper surface when observing above-mentioned upper surface is along the zone of forming direction extension.
9. method of manufacture according to claim 8; Wherein, the number that is disposed at the quantity of the heat-eliminating medium supply-pipe in the above-mentioned manufacturing installation and the ejiction opening that allocation position, heat-eliminating medium supply-pipe have is determined to be and makes above-mentioned cooling promote the zone to have roughly the same width towards forming direction.
10. method of manufacture according to claim 8; Wherein, the number that is disposed at the quantity of the heat-eliminating medium supply-pipe in the above-mentioned manufacturing installation and the ejiction opening that allocation position, heat-eliminating medium supply-pipe have is determined to be the width that makes above-mentioned cooling promote the zone and increases intermittently or continuously towards forming direction.
11. one kind is used to heat, softens with the method for manufacture of stamping forming impact briquetting with the glass material, wherein,
Make sheet glass through the described method of claim 8, cut apart above-mentioned sheet glass and make a plurality of glass sections, above-mentioned section is processed.
12. the method for manufacture of an optical element heats, softens the glass material, through making glass optical element after the impact briquetting operation, wherein,
Make impact briquetting through the described method of claim 11 and use the glass material, to above-mentioned glass material heat, soften, impact briquetting.
13. the method for manufacture of a sheet glass is made sheet glass through the described method of claim 8, through comprising cutting processing in interior operation, makes sheet glass by above-mentioned sheet glass.
14. the method for manufacture of a sheet glass; This method of manufacture will be cast in the casting mold from the effusive melten glass of nozzle continuously; This casting mold have the regulation sheet glass width a pair of relative sidewall and have the bottom of the side in 2 relative major surfacess of above-mentioned sheet glass being carried out the upper surface of moulding, side is unidirectional downstream moves from the upstream side of forming direction to make the glass that is cast into along above-mentioned two sidewalls, continuously flat sheet glass is carried out moulding simultaneously; Wherein
Be cast into and the flat moulding of above-mentioned melten glass are carried out promoting the zone to carry out local refrigerative to cooling simultaneously, and above-mentioned cooling promotes that zone is that position and the position under the said nozzle under the said nozzle of overlooking above-mentioned upper surface when observing above-mentioned upper surface is towards the forming direction extension and have the zone of roughly the same width.
15. method of manufacture according to claim 14, wherein, the width of above-mentioned flat sheet glass to the ratio of thickness in 3～50 scope.
16. according to claim 14 or 15 described method of manufacture, wherein, above-mentioned cooling promotes that the width in zone is in 5～40% the scope of width of above-mentioned upper surface.
17. the method for manufacture of sheet glass according to claim 14, wherein, above-mentioned cooling promotes the position under the zone passage nozzle, has the symmetric shape of imaginary line of extending about towards forming direction.
18. the method for manufacture of sheet glass according to claim 14; Wherein, above-mentioned cooling promotes the zone to be arranged at position under the nozzle to be in up to the temperature of glass towards forming direction between Tg-100 ℃ of glass tansition temperatures～Tg+100 ℃ the position of scope.
19. method of manufacture according to claim 14, wherein, the bottom of above-mentioned casting mold have in inside with above-mentioned sidewall approximate vertical and with at least 2 through holes of upper surface almost parallel,
In the above-mentioned through hole one is equipped on the position under the nozzle, and remaining at least 1 through hole is equipped on the position, downstream side under the nozzle,
Above-mentioned through hole has opening in the side that links to each other with outer side above-mentioned sidewall the bottom,
Has at least 1 ejiction opening that is used for to side ejection heat-eliminating medium in above-mentioned each through hole; And the heat-eliminating medium supply-pipe has the heat-eliminating medium that can make from the ejection of above-mentioned ejiction opening and can flow to size and/or shape outside the through hole from above-mentioned opening; And the medium supply-pipe that is cooled is configured to make at least 1 in the above-mentioned ejiction opening and is positioned at through hole
Above-mentioned heat-eliminating medium supply-pipe has the ejiction opening that number is identical and shape is identical each other,
Inner through heat-eliminating medium being imported the above-mentioned heat-eliminating medium supply-pipe that is disposed in the above-mentioned through hole, from above-mentioned ejiction opening ejection heat-eliminating medium, near the upper surface the above-mentioned ejiction opening is cooled off, carry out the cooling of aforementioned region.
20. method of manufacture according to claim 18, wherein, the quantity of above-mentioned through hole and above-mentioned heat-eliminating medium supply-pipe is in 2～10 scope.
21. one kind is used to heat, softens with the method for manufacture of stamping forming impact briquetting with the glass material, wherein,
Make sheet glass through the described method of claim 14, cut apart above-mentioned sheet glass and make a plurality of glass sections, above-mentioned section is processed.
22. the method for manufacture of an optical element heats, softens the glass material, makes glass optical element through the impact briquetting operation, wherein,
Make impact briquetting through the described method of claim 21 and use the glass material, above-mentioned glass material is heated, softens, carry out impact briquetting.
23. the method for manufacture of a sheet glass is made sheet glass through the described method of claim 14, through comprising cutting processing in interior operation, makes sheet glass by above-mentioned sheet glass.
24. the method for manufacture of a sheet glass; This method of manufacture will be cast in the casting mold from the effusive melten glass of nozzle continuously; This casting mold have the regulation sheet glass width a pair of relative sidewall and have the bottom of the side in 2 relative major surfacess of above-mentioned sheet glass being carried out the upper surface of moulding, side is unidirectional downstream moves from the upstream side of forming direction to make the glass that is cast into along above-mentioned two sidewalls, simultaneously continuously shaped flat sheet glass; Wherein
Be cast into and the flat moulding of above-mentioned melten glass are carried out promoting the zone to carry out local refrigerative to cooling simultaneously, above-mentioned cooling promote zone be under the said nozzle of overlooking above-mentioned upper surface when observing above-mentioned upper surface position and the position under the said nozzle forming direction extend and width towards the downstream side zone of increase intermittently or continuously.
25. method of manufacture according to claim 24, wherein, the width of above-mentioned flat sheet glass to the ratio of thickness in 3～80 scope.
26. according to claim 24 or 25 described method of manufacture; Wherein, Above-mentioned cooling promotes that zone width of position under nozzle is in 30～70% the scope of width of above-mentioned upper surface, in the width of downstream position is 60～90% the scope of width of above-mentioned upper surface.
27. the method for manufacture of sheet glass according to claim 24, wherein, above-mentioned cooling promotes the position under the zone passage nozzle, is provided with symmetrically about the imaginary line that extends towards forming direction.
28. the method for manufacture of sheet glass according to claim 24; Wherein, above-mentioned cooling promotes the zone to be arranged at position under the nozzle to be in up to glass temperature towards forming direction between Tg-100 ℃ of glass tansition temperatures～Tg+100 ℃ the position of scope.
29. method of manufacture according to claim 24, wherein, the bottom of above-mentioned casting mold have in inside with above-mentioned sidewall approximate vertical and with at least 2 through holes of upper surface almost parallel,
In the above-mentioned through hole one is equipped on the position under the nozzle, and remaining at least 1 through hole is equipped on the position, downstream side under the nozzle,
Above-mentioned through hole has opening in the side that links to each other with outer side above-mentioned sidewall the bottom,
Has at least 1 ejiction opening that is used for to side ejection heat-eliminating medium in above-mentioned each through hole; And the heat-eliminating medium supply-pipe has the heat-eliminating medium that can make from the ejection of above-mentioned ejiction opening and flows to size and/or shape outside the through hole from above-mentioned opening; And the heat-eliminating medium supply-pipe is configured to make in the above-mentioned ejiction opening at least one to be positioned at through hole
Inner through heat-eliminating medium being imported the above-mentioned heat-eliminating medium supply-pipe that is disposed in the above-mentioned through hole, from above-mentioned ejiction opening ejection heat-eliminating medium, near the upper surface the above-mentioned ejiction opening is cooled off, carry out the cooling of aforementioned region.
30. method of manufacture according to claim 28, wherein, the quantity of above-mentioned through hole and above-mentioned heat-eliminating medium supply-pipe is in 2～10 scope.
31. one kind is used to heat, softens with the method for manufacture of stamping forming impact briquetting with the glass material, wherein,
Make sheet glass through the described method of claim 24, cut apart above-mentioned sheet glass and make a plurality of glass sections, above-mentioned section is processed.
32. the method for manufacture of an optical element heats, softens the glass material, makes glass optical element through the impact briquetting operation, wherein,
Make impact briquetting through the described method of claim 31 and use the glass material, above-mentioned glass material is heated, softens, carry out impact briquetting.
33. the method for manufacture of a sheet glass wherein, is made sheet glass through the described method of claim 24, through comprising cutting processing in interior operation, makes sheet glass by above-mentioned sheet glass.
CN201110162096.8A 2010-06-16 2011-06-16 The manufacture method of the manufacturing installation of sheet glass, sheet glass, impact briquetting glass material, optical element and sheet glass Active CN102329070B (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2010137502A JP5537278B2 (en) 2010-06-16 2010-06-16 Manufacturing methods for glass plates, press molding materials, optical elements, and thin glass
JP2010137507A JP5618645B2 (en) 2010-06-16 2010-06-16 Glass plate manufacturing apparatus, glass plate, glass material for press molding, optical element, thin glass manufacturing method
JP2010-137502 2010-06-16
JP2010-137507 2010-06-16
JP2010137505A JP5075228B2 (en) 2010-06-16 2010-06-16 Manufacturing methods for glass plates, press molding materials, optical elements, and thin glass
JP2010-137505 2010-06-16

Publications (2)

Publication Number Publication Date
CN102329070A true CN102329070A (en) 2012-01-25
CN102329070B CN102329070B (en) 2016-02-10

Family

ID=45481066

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110162096.8A Active CN102329070B (en) 2010-06-16 2011-06-16 The manufacture method of the manufacturing installation of sheet glass, sheet glass, impact briquetting glass material, optical element and sheet glass

Country Status (1)

Country Link
CN (1) CN102329070B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107056024A (en) * 2017-06-16 2017-08-18 湖北新华光信息材料有限公司 Optical glass forming mold
CN108164126A (en) * 2017-12-08 2018-06-15 湖北新华光信息材料有限公司 A kind of optical glass strip material molding machine
CN108455827A (en) * 2018-06-20 2018-08-28 中国南玻集团股份有限公司 Water coolers and molten tin bath equipment
US11512015B2 (en) 2016-11-23 2022-11-29 Corning Incorporated Method and apparatus for glass ribbon thermal control

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002321931A (en) * 2001-04-23 2002-11-08 Canon Inc Method of forming optical element
CN1789182A (en) * 2004-12-15 2006-06-21 亚洲光学股份有限公司 Continuous glass mold forming system
JP2007269500A (en) * 2006-03-30 2007-10-18 Ohara Inc Method and apparatus for forming glass

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002321931A (en) * 2001-04-23 2002-11-08 Canon Inc Method of forming optical element
CN1789182A (en) * 2004-12-15 2006-06-21 亚洲光学股份有限公司 Continuous glass mold forming system
JP2007269500A (en) * 2006-03-30 2007-10-18 Ohara Inc Method and apparatus for forming glass

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11512015B2 (en) 2016-11-23 2022-11-29 Corning Incorporated Method and apparatus for glass ribbon thermal control
CN107056024A (en) * 2017-06-16 2017-08-18 湖北新华光信息材料有限公司 Optical glass forming mold
CN107056024B (en) * 2017-06-16 2019-12-27 湖北新华光信息材料有限公司 Optical glass forming die
CN108164126A (en) * 2017-12-08 2018-06-15 湖北新华光信息材料有限公司 A kind of optical glass strip material molding machine
CN108164126B (en) * 2017-12-08 2021-03-16 湖北新华光信息材料有限公司 Optical glass strip forming device
CN108455827A (en) * 2018-06-20 2018-08-28 中国南玻集团股份有限公司 Water coolers and molten tin bath equipment

Also Published As

Publication number Publication date
CN102329070B (en) 2016-02-10

Similar Documents

Publication Publication Date Title
CN101397183B (en) Precision mould-pressing forming performing member, forming mould, optical element and production method thereof
CN101622207B (en) Optical glass, preform for press forming, optical element and their manufacture method
CN102329070A (en) Glass plate manufacturing device, glass plate, glass material for punch forming, optical element and sheet glass manufacturing method
CN1899991B (en) Methods for manufacturing performs for press molding and method for manufacturing optical elements
CN102873876A (en) Device for extrusion molding
CN101827795A (en) Glass container one-press manufacturing method
CN100376498C (en) Slowly cooling method for glass articles, heating method for glass articles, production method for glass formed articles and heat treatment apparatus
CN102791642B (en) Method for producing glass blank, method for producing magnetic recording medium substrate, and method for producing magnetic recording medium
JP4445419B2 (en) Method for producing glass molded body, method for producing glass material for press molding, and method for producing optical element
US20120094821A1 (en) Method and devices for producing optical glass elements, particularly concentrator optics
RU2013145303A (en) METHOD AND INSTALLATION FOR MANUFACTURE HOLLOW GLASS PRODUCTS OF SMALL THICKNESS
JP5075228B2 (en) Manufacturing methods for glass plates, press molding materials, optical elements, and thin glass
JP4856027B2 (en) Manufacturing method of glass plate, manufacturing method of glass material for press molding, and manufacturing method of optical component
CN1939850B (en) Manufacturing method of glass block, manufacturing device thereof and manufacturing method of optical element
JP5618645B2 (en) Glass plate manufacturing apparatus, glass plate, glass material for press molding, optical element, thin glass manufacturing method
JP4467201B2 (en) Manufacturing method of glass plate, manufacturing method of press molding material, and manufacturing method of optical component
JP5654383B2 (en) Manufacturing method of glass preform for precision press molding and manufacturing method of optical element
CN203170930U (en) Copper-alloy strip producing device by spray deposition
JP5537278B2 (en) Manufacturing methods for glass plates, press molding materials, optical elements, and thin glass
US20020053223A1 (en) Method of manufacturing micro glass optical element
CN104470860B (en) Glass products formed and its manufacture method, optical element blank and optical element and its manufacture method
CN102849925A (en) Optical glass strip material molding plug
JP5345228B2 (en) Manufacturing method of glass preform for precision press molding and manufacturing method of optical element
CN102757168A (en) Method for producing preset-shaped glass member for precision stamping molding and method for producing optical element
CN202377261U (en) Hot rolling device for processing magnesium alloy plates

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant