CN1621372A - Air suspension method for solid glass block - Google Patents
Air suspension method for solid glass block Download PDFInfo
- Publication number
- CN1621372A CN1621372A CN 200310111012 CN200310111012A CN1621372A CN 1621372 A CN1621372 A CN 1621372A CN 200310111012 CN200310111012 CN 200310111012 CN 200310111012 A CN200310111012 A CN 200310111012A CN 1621372 A CN1621372 A CN 1621372A
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- CN
- China
- Prior art keywords
- material piece
- suspension method
- gas suspension
- tuyere
- solid material
- 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.)
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
- C03B40/02—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it by lubrication; Use of materials as release or lubricating compositions
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
Abstract
The present invention relates to one kind secondary optical glass mold pressing process. During the process, prepared glass material block is suspended with compressed air flow in the air and heated to soften in glass softening furnace. The softened glass blank has no any contaminating solid particle in the surface and may be molded to form various kinds of spherical and aspherical optical elements. The molded high precision optical element has ideal surface smoothness, and may be used in optical image system directly or after being filmed.
Description
Technical field the present invention relates to optical glass secondary press (spherical mirror element die mould, aspherical mirror element die mould are compression molding) technological process, also relates to some other and need to guarantee the solid substance particle of not being infected with by other pressed powder releasing agent on its surface, the heating and melting technological process of material piece in the thermoplastic process.Be particularly related in the optical glass secondary press process, the present invention holds up one piece of frit block of getting ready with one compressed air vertically upward preparing remollescent opticglass material base to be heated, stable the aerial of pressurized air tuyere top that be suspended in, and enter in the softening furnace with the Jet Stream device that moves in the glass softening furnace in the same way, be suspended in be heated in the air softening.The no any solia particle in glass material base surface after softening is infected with, and can be widely used in the compression molding of optical elements such as aspheric surface, sphere.The surface of the high-precision optical element after the moulding can reach the ideal mirror-finishing, just need not grind, polish directly or behind the plated film to be used for optical imaging system.
Before background technology the present invention produces, opticglass become optical element and then satisfy the method for the optical element of each optics such as microscopic system, telescopic system, photographic system, electro-optical system, optoelectronic areas needs, be divided into two big classes altogether: opticglass cold working and thermoforming.Wherein, opticglass cold working is a kind of with method such as the technologies such as cutting, rounding, corase grind, fine grinding, correct grinding, polishing of optical glass blank material piece by mechanical workout, mao blank block is become meet the traditional diamond-making technique of the optical element of all kinds of optics, electro-optical system needs.Because of its have maneuverability but utilization rate of raw materials low, be difficult to process aspherical optical element, characteristics that working (machining) efficiency is low, only be adapted to that the small serial production volume is relatively large, machined surface is the optical element of plane or sphere; And the method for the suitable scale operation specification that the opticglass thermoforming is a kind of opticglass material piece with the hot mastication state by the moulding of die mould mode, optical element that visual appearance is identical.The opticglass thermoforming can be divided into two kinds of modes of production such as die mould and secondary press again, and wherein a die mould is eliminated owing to maneuvering ability is too poor, does not almost have production firm to use; Secondary press is good because of having mobility strong, production efficiency height, homogeneity of product, is fit to advantage such as large-scale industrial production and is adopted by most of optical glass device blank production firm in the world.It is with the weight of opticglass material piece blank according to final optical element, amplifying its weight by certain coefficient gets the raw materials ready, after surface treatment (vibration abrasive material), be placed on again in the recessed holder of charge of porcelain box, at last the porcelain box is sent in the process furnace when glass heats softened to the state that can be used for die mould, take out the remollescent frit block, send into and be compressed to required optical element in the press.Because the part that the remollescent glass surface contacts with the porcelain box in the recessed holder of porcelain box has been infected with the Al that brushes in advance in the recessed holder of porcelain box
2O
3Or BN parting agent (also being releasing agent) micro mist, optical element surface behind the die mould does not just reach polishing smooth finish (if brushing releasing agent in the recessed holder of porcelain box not because of these releasing agent micro mists of being infected with, remollescent glass will stick in the recessed holder of porcelain box, can't demoulding die mould).This moment, the optical element that suppresses wanted remollescent glass will stick in the recessed holder of porcelain box, can't demoulding die mould).The optical element that suppress this moment wants to be used for actual optical system, must carry out technological processs such as fine grinding, correct grinding, polishing to it.Not only increased processing link and cost, also prolonged the duration, reduced good article rate.How to avoid optical glass blank material grain, material piece surface in the thermoplastic process, to be infected with, people have carried out big quantity research, as taked to reduce the releasing agent granularity as far as possible, reduce glass transition temperature and some other way as far as possible, still can not fundamentally solve the problem of being infected with on soften glass surface.
To be a kind of utilization have gas adjustable and can constant pressure from one of a spout ejection vertically upward holds one piece of remollescent solid material to be heated for preparing in summary of the invention the present invention, treat die mould material blank material agglomerate as opticglass, allow it through the glass softening furnace gradually, and then do not have the thermoplastic gas suspension device of single solid that a bit solia particle is infected with the glass surface after softening.As shown in Figure 1.1 is the refractory metal pipe that an opening makes progress, and upper orifice can be made as toroidal, so that hold to be heated softening material piece such as the frit block of putting on it 2, the bottom of metal tube 1 is compressed-air actuated import.When pressurized air 3 (as shown in Figure 2, as follows) enter refractory metal pipe 1 after, controlled, the pressurized air 3 of constant pressure will rush at the glass block 2 that places the metal mouth of pipe mouth of pipe top, under the supporting of 3 one-tenth lotus receptacle shapes of the pressurized air that is separated by glass block 2 air cushion 4, when the supporting power that makes progress of the weight of glass block 2 and air cushion 4 balances each other, glass block 2 will steadily be suspended in the top of the refractory metal pipe 1 horn-like mouth of pipe, and under the lifting and promote of air cushion 4 air-flows, glass block 2 will be done the random rotational motion of rolling around the center of gravity of himself, also can do small random vibration on the variant up and down orientation of its center of gravity.The range comprehension of the air cushion 4 that can not fly out but glass block 2 all can be suspended in the top of metal tube 1 mouth of pipe air cushion 4 all the time and dropping down.What is more important, refractory metal pipe 1 changes not too violent move and during uniform motion (level, above-below direction and even any direction all can) making speed, being suspended in aerial glass block 2 by air cushion 4 picking-ups also can be along with refractory metal pipe 1 be done in the same way, is synchronized with the movement, and glass block 2 is suspended in the equilibrium theory of tide of the center of square air cushion 4 on refractory metal pipe 1 mouth of pipe all the time.Therefore, by certain mechanical system, allow refractory metal pipe 1 preheating zone, hot mastication district (not the drawing among the figure) by process furnace evenly, thereon the glass block 2 of suspending will be preheated gradually with its preheating zone, hot mastication district by above-mentioned process furnace, softening and then reach the state that is applicable to the die mould purpose and can not be infected with any solid state powder impurity.Its condition of surface will reach the ideal mirror-finishing.People can make the assembly of some and above-mentioned refractory metal pipe 1 same structure simultaneously, all place one piece of glass block on each assembly, allow it in succession by process furnace, and soften glass material piece sustainably just satisfies the demand of large-scale industrial production.Above-mentioned said refractory metal pipe is not the restriction to materials used of the present invention, be a kind of exemplifying, in fact the material that can be used for the high temperature resistant inlet pipe of the present invention is various, so long as the material that has high temperature resistant, anti-higher pressure and have higher high-temperature machinery intensity all can select for use, as porcelain tube or the like; Inlet pipe tubulose and hydraucone face shaping neither be to the restrictions of refractory metal tube exterior state, in fact, so long as have on any apparent condition such as plane, the column surface diameter less than or greater than the opening hole vertically upward of quilt suspension solids piece diameter, all can produce the gas that sprays from hole will treat that suspended substance is suspended in aerial effect, and only the present invention only is in order to narrate substantial principle of the present invention intuitively and easily to the description of above-mentioned refractory metal tube shape.And the present invention's material piece of will waiting in the accompanying drawings to suspend is depicted as a spheroid, neither be to the shape restriction of the solid-state material piece of waiting to suspend of the present invention.Experiment shows, treats the suspended substance piece so long as not sheet, wire, even not too Gui Ze bulk material is fast, can both be suspended in aerial effectively.And the solids piece that is suspended also is not limited only to opticglass material piece, and any needs at high temperature soften and do not wish that the solid matter agglomerate of being infected with solid-state parting agent powder impurity is included among the intension of the present invention.In other words, be exactly the pollution-free heat softening process that opticglass material piece is not only contained in the present invention, the at high temperature softening solid matter agglomerate of any needs and do not wish to be infected with the solid parting agent and in all being encompassed in when using this gas suspension device by the present invention.
In the description of drawings accompanying drawing of the present invention, Fig. 1 is when leading to pressurized air, the diagrammatic cross-section of the position relation of refractory metal pipe 1 and solid matter to be heated such as spherical or approximate globular glass material piece 2, section is in the geometric centre of refractory metal pipe 1 with frit block 2; Fig. 2 is feed the pressurized air 3 of stable gas pressure in refractory metal pipe 1 after, the principle diagrammatic cross-section of gas suspension solid matter 2, and profile position still is perpendicular to horizontal plane and in the geometric centre of refractory metal pipe 1 with frit block 2.
Embodiment embodiments of the invention 1: as shown in Figure 1, with an internal diameter is φ 6mm, wall thickness is 2mm, top has the long stainless steel tube 1 (also available other high temperature material such as porcelain tube etc.) of the bell-mouthed 100mm of the high 6mm of φ 15mm and is connected on the high-pressure air air inlet mouth of pipe of an adjustable in pressure of its underpart, air intake duct is fixed on one and can just can enters on the movable base in the glass softening furnace that temperature changes from low to high by simple mechanical device, there is many with above-mentioned bell mouth shape metal tube 1 identical device (all not draw among the figure on the pedestal, but do not influence the description of the accuracy of embodiment), on each is bell-mouthed, all place the φ 12mm of a softening die mould to be heated, spherical or the approximate globular glass block 2 of heavily about 5g has promptly been carried out the thermoplastic preparation work of glass block.Allow above-mentioned unillustrated pedestal at the uniform velocity in softening furnace, move, and the ascending pressure ground that increases gradually feeds pressurized air 3 (as Fig. 2 in above-mentioned metal tube 1, as follows), the compressed air 3 of the glass block 2 that hydraucone is placed above in feeding metal tube 1 is separated into rise slowly under the supporting effect of lotus shape gas holder 4 by glass block 2, be suspended in aerial, and it is softening to the required temperature of die mould to enter the glass softening furnace with the metal tube 1 that moves in the softening furnace in the same way, promptly can be used for die mould.Because glass is suspended in the air always, so thoroughly overcome the drawback that traditional method is put in glass the glass surface quality after the frit block surface can be infected with the releasing agent micro mist and then be reduced die mould after the thermoplastic in the porcelain box, glass surface after softening is a kind of perfect smooth mirror surface state, thereby has realized purpose of the present invention.
Claims (6)
1, this solid material piece gas suspension method is characterized in that, holds one piece of solid matter group, piece placed thereon with one high-pressure air that sprays in the tuyere vertically upward, makes the aerial of its top certain distance that is suspended in tuyere.
2, this solid material piece gas suspension method, its feature also are, form the material of jet vertically upward tuyere, both metal pipe material, sheet metal, and also metal, non-metallic material are as long as it has higher high temperature strength.
3, this solid material piece gas suspension method, its feature also are, form the shape of jet vertically upward tuyere, both bell mouth shapes, also straight bung shape, and other shape promptly belong to the present invention and contain category as long as it can spray one high-pressure air air-flow vertically upward.
4, this solid material piece gas suspension method, its feature are that also the material of the solid material piece that is suspended not only is confined to opticglass material piece.So long as, all belong to the present invention and contain category with this gas suspension method any solids material piece that suspends.
5, this solid material piece gas suspension method, its feature also be, the face shaping of the solid material piece that is suspended, both spherules, also approximate globular rule, irregular how much polyhedrons.
6, this solid material piece gas suspension method, its feature also be, tuyere annular or other modes of the indication of the present invention of many same structures are arranged, and the solid-state material piece that all suspends on each tuyere is still contained by the present invention to improve work efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310111012 CN1621372A (en) | 2003-11-24 | 2003-11-24 | Air suspension method for solid glass block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310111012 CN1621372A (en) | 2003-11-24 | 2003-11-24 | Air suspension method for solid glass block |
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| Publication Number | Publication Date |
|---|---|
| CN1621372A true CN1621372A (en) | 2005-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310111012 Pending CN1621372A (en) | 2003-11-24 | 2003-11-24 | Air suspension method for solid glass block |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173564A (en) * | 2011-03-08 | 2011-09-07 | 湖南大学 | Non-isothermal air float type die forming method |
| CN102884013A (en) * | 2010-05-20 | 2013-01-16 | 奥林巴斯株式会社 | Optical element manufacturing method and optical element manufacturing device |
| CN103889909A (en) * | 2011-11-21 | 2014-06-25 | 奥林巴斯株式会社 | Optical element manufacturing method and optical element manufacturing device |
| CN105198209A (en) * | 2015-09-28 | 2015-12-30 | 中国科学院上海硅酸盐研究所 | Infrared-permeable calcium aluminate glass preparation method |
-
2003
- 2003-11-24 CN CN 200310111012 patent/CN1621372A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102884013A (en) * | 2010-05-20 | 2013-01-16 | 奥林巴斯株式会社 | Optical element manufacturing method and optical element manufacturing device |
| CN102173564A (en) * | 2011-03-08 | 2011-09-07 | 湖南大学 | Non-isothermal air float type die forming method |
| CN103889909A (en) * | 2011-11-21 | 2014-06-25 | 奥林巴斯株式会社 | Optical element manufacturing method and optical element manufacturing device |
| CN103889909B (en) * | 2011-11-21 | 2016-08-31 | 奥林巴斯株式会社 | The manufacture method of optical element and the manufacture device of optical element |
| US9662845B2 (en) | 2011-11-21 | 2017-05-30 | Olympus Corporation | Method for manufacturing optical element and device for manufacturing same |
| CN105198209A (en) * | 2015-09-28 | 2015-12-30 | 中国科学院上海硅酸盐研究所 | Infrared-permeable calcium aluminate glass preparation method |
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