CN101624257A - Heating processing and equipment thereof for molded glass - Google Patents
Heating processing and equipment thereof for molded glass Download PDFInfo
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- CN101624257A CN101624257A CN200810135643A CN200810135643A CN101624257A CN 101624257 A CN101624257 A CN 101624257A CN 200810135643 A CN200810135643 A CN 200810135643A CN 200810135643 A CN200810135643 A CN 200810135643A CN 101624257 A CN101624257 A CN 101624257A
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Abstract
The invention relates to a heating processing for molded glass. The heating processing comprises the following steps: firstly, providing a first heat source used for directly heating a glass coarse blank configured in a mold and providing a second heat source used for directly heating the mold; softening the glass coarse blank in the process of the temperature rise of the first heat source, pressurizing on the glass coarse blank by the mold and cooling the glass coarse blank to be shaped into an optical element in the process of the pressurization of the mold.
Description
Technical field
The invention relates to a kind of mold formed method, and particularly relevant for a kind of heating means of molded glass.
Background technology
In recent years, the market of optical articles such as digital camera develops rapidly, also improve gradually for the requirement of image quality, and mobile phone camera also will be increased to more than the hundred everything elements the requirement of pixel.If the optical mirror slip that penetrates with general plastics can't reach such image quality, therefore must use glass mirror.Particularly, for aspheric small size glass mirror, with the processing mode manufacturing that the tradition polishing is ground, not only difficulty height and speed are slow, do not meet economic benefit.Therefore, producing aspheric small size glass mirror in molded mode, has been the trend of following inevitable development, but mass production quality homogeneous and have high-precision aspherical lens meets the demand of industry.
Yet, in the middle of existing mold formed processing procedure, the thick embryo of glass is put in mould, under the condition of high temperature, high pressure and anaerobic (shielding gas or rare gas element), disposable die forming is required optical mirror slip.The control of temperature, pressure and other parameters has very big influence for the dimensional precision after being shaped, the common practice be with mould with the glass heat temperature raising near the softening temperature of glass, utilize mould to the thick embryo pressurization of glass again.Next, under the state that keep-ups pressure, Yi Bian cooling die, its temperature is reduced under the invert point of glass.This mould is called the isothermal pressurization with the method for glass isothermal heating, its shortcoming is a heat temperature raising, cooling all needs long time, so production rate is very slow.Also owing to after the heating source elder generation heating mould, utilize the thick embryo of mould indirect heating glass to softening temperature again, the easy Yin Gaowen of mould wears away and the life-span is reduced, and causes the error on the dimensional precision.
Summary of the invention
The invention provides a kind of heating processing and process apparatus thereof of molded glass, can be directly to the thick embryo heating of glass, to reduce the thermal power loss and to improve the efficient of processing procedure.
The present invention proposes a kind of heating processing of molded glass.At first, provide at least one first thermal source, in order to being disposed at the thick embryo direct heating of glass in the mould.Provide one second thermal source, in order to this mould direct heating.In the process that heats up with this first thermal source, make the thick embryo of this glass softening and with this mould pressurization.In the process of pressurizeing, make the thick embryo cooling of this glass and be configured as an optical element with this mould.
The present invention proposes a kind of process apparatus of molded glass, comprises a mould, at least one first thermal source, one second thermal source and a compression module.This mould has a upper cores and die once, in order to place the thick embryo of glass between this upper cores and this time die.First thermal source is in order to the thick embryo of this glass of direct heating, and second thermal source is in order to heat this mould.Compression module makes with this first thermal source in the thick embryo remollescent of this glass process, makes the thick embryo of this glass be configured as an optical element to this mould pressurization.
In one embodiment of this invention, first thermal source heats with thermal convection or thermal-radiating mode, and second thermal source heats in heat conducting mode.
In one embodiment of this invention, the thick embryo of glass for the specific absorption of first thermal source greater than specific absorption for second thermal source.
In one embodiment of this invention, the process that heats up with first thermal source comprises with a heat gun or an infrared lamp the thick embryo of glass is warming up to softening temperature.
In one embodiment of this invention, also can mould be placed in one, and stay the position of the thick embryo of a through-hole alignment glass, so that hot blast or thermal radiation enter in the outer sleeve via through hole by an outer sleeve.
The present invention adopts first thermal source of different heat propagation modes and second thermal source respectively to thick embryo of glass and mold heated.Owing to the thick embryo of glass has preferable specific absorption for thermal convection or thermal radiation, therefore can avoid the shortcoming of the thick embryo of traditional glass by the mould indirect heating, save the loss of thermal power, increase the efficient of processing procedure and the life-span of prolongation mould.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the process apparatus of molded glass and the schema of manufacture method thereof.
Fig. 2 is the cross-sectional side view of the molded glass of one embodiment of the invention.
The main element nomenclature
100: the thick embryo of glass
102: optical element
110: mould
112: following die
114: upper cores
H1: first thermal source
H2: second thermal source
120: compression module
130: outer sleeve
132: through hole
Embodiment
Fig. 1 is the process apparatus of molded glass and the schema of manufacture method thereof, and Fig. 2 is the cross-sectional side view of the molded glass of one embodiment of the invention.
Please refer to Fig. 1, the manufacture method of molded glass mainly is divided into (A) preposition step (B) heating step (C) pressurization steps (D) cooling step (E) demoulding step etc.At first, in (A) preposition step, the thick embryo 100 of spheric glass is positioned on the following die 112 of mould 110, then the thick embryo 100 of glass is fixed between upper cores 114 and the following die 112 with upper cores 114.Afterwards, placing a heating chamber (not shown), and heating rod (heater) or other thermals source are fixed on the mould 110, is good with the position near the thick embryo 100 of glass.Then, in (B) heating step, by thick embryo 100 direct heating of 1 pair of glass of first heat source H, make it softening, mould 110 is then by heating rod (heater) or other second heat source H, 2 direct heating, so that the temperature of mould 110 reaches working temperature.Afterwards, in (C) pressurization steps, when treating that the thick embryo of glass 100 is softening, apply pressure to mould 110, allow upper cores 114 engage so that thick embryo 100 shapings of glass with following die 112 with compression module 120.In (D) cooling step, keep-up pressure and cause distortion to prevent that the thick embryo 100 of glass from shrinking because of cooling.At last, in (E) demoulding step, taking out the optical element 102 after being shaped, for example is biconvex eyeglass, concave-concave eyeglass or aspherical lens etc.
It should be noted that traditional moulds with the method for the thick embryo isothermal heating of glass can cause the working temperature of mould too high, shortcoming such as mould heats up and the time of cooling is oversize.Because heating rod (heater) is via heat conducting mode heating mould, must wait mould near the thick embryo of glass is warmed up to softening temperature, just can carry out (C) pressurization steps.Yet, in the process with the thick embryo of mould indirect heating glass, can waste portion of hot power on mould, whole thermal powers directly can't be used on the thick embryo of glass, therefore the speed that heats up is very slow.Also because the working temperature of mould is too high, Yin Gaowen wears away and the life-span is reduced easily.
The present invention need not pass through mould 110 with the thick embryo direct heating of 1 pair of glass of first heat source H, whole thermal powers directly can be used on the thick embryo 100 of glass, and therefore the speed that heats up is very fast, to improve the efficient of processing procedure.In the present embodiment, first heat source H 1 for example heats the thick embryo 100 of glass with at least one heat gun or at least one infrared lamp with thermal convection or the thick embryo 100 of thermal-radiating mode heating glass, makes it be warming up to softening temperature.Please refer to Fig. 2, when with the heat gun direct heating, hot blast can be concentrated and near the convection current thick embryo 100 of glass by airduct, allows the thick embryo 100 of glass be rapidly heated under the pyritous environment and softens, and the time that is heated to glass transition temperature from normal temperature can significantly shorten in 300 seconds.When with the infrared lamp direct heating, heat energy can allow the temperature of the thick embryo of glass increase by the radiation conduction, for example transmits ultrared radiating capacity to the thick embryo 100 of glass, to increase thermal-radiating specific absorption by suitable media.In addition, in order to increase the surrounding temperature of the thick embryo 100 of glass, also can be by an outer sleeve 130 with mould 110 as for wherein, and stay a through hole 132 to aim at the position of the thick embryo 100 of glass, hot blast or ultrared heat energy can be entered in the outer sleeve 130 by through hole 132, with the thick embryo 100 of direct heating glass.
Because the thick embryo 100 of glass has preferable specific absorption for thermal convection or thermal radiation, especially the thermal radiation of near-infrared band can make the internal and external temperature of the thick embryo of glass reach softening temperature fast and evenly, heat in heat conducting mode with respect to heating rod (heater) or other second heat source H 2, heat energy must conduct by ecto-entad, thereby the internal and external temperature of the thick embryo of glass can't reach equal temperature state very soon, so the present invention with thermal convection or the thick embryo 100 of thermal-radiating first heat source H, 1 direct heating glass, can improve the homogeneity of specific absorption and internal and external temperature.
In addition, mould 110 can shorten by the time that heating rod (heater) or other second heat source H 2 are heated to working temperature, and the working temperature of mould 110 can be lower than the softening temperature of the thick embryo 100 of glass, for example dropped to 630 ℃ by original 700 ℃, even lower.Therefore, the life-span of mould 110 can prolong.
In sum, the present invention adopts first thermal source of different heat propagation modes and second thermal source respectively to thick embryo of glass and mold heated.Owing to the thick embryo of glass has preferable specific absorption for thermal convection or thermal radiation, therefore can avoid the shortcoming of the thick embryo of traditional glass by the mould indirect heating, reduce the loss of thermal power, increase the efficient of processing procedure and the life-span of prolongation mould.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (10)
1. the heating processing of a molded glass comprises:
Provide at least one first thermal source, in order to being disposed at the thick embryo direct heating of glass in the mould;
Provide one second thermal source, in order to this mould direct heating;
In the process that heats up with this first thermal source, make the thick embryo of this glass softening and with this mould pressurization; And
In the process of pressurizeing, make the thick embryo cooling of this glass and be configured as an optical element with this mould.
2. the heating processing of molded glass according to claim 1, wherein this first thermal source heats with thermal convection or thermal-radiating mode, and this second thermal source heats in heat conducting mode.
3. the heating processing of molded glass according to claim 1, wherein the thick embryo of this glass for the specific absorption of this first thermal source greater than specific absorption for this second thermal source.
4. the heating processing of molded glass according to claim 1, wherein the process that heats up with this first thermal source comprises with a heat gun the thick embryo of this glass is warming up to softening temperature.
5. the heating processing of molded glass according to claim 1, wherein the process that heats up with this first thermal source comprises with an infrared lamp the thick embryo of this glass is warming up to softening temperature.
6. the process apparatus of a molded glass comprises:
One mould has a upper cores and die once, in order to place the thick embryo of glass between this upper cores and this time die;
At least one first thermal source is in order to the thick embryo of this glass of direct heating;
One second thermal source is in order to heat this mould; And
One compression module makes with this first thermal source in the thick embryo remollescent of this glass process, makes the thick embryo of this glass be configured as an optical element to this mould pressurization.
7. the process apparatus of molded glass according to claim 6 also comprises an outer sleeve, and this outer sleeve places outside this mould, and has the position of the thick embryo of this glass of a through-hole alignment.
8. the process apparatus of molded glass according to claim 6, wherein this first thermal source heats with thermal convection or thermal-radiating mode.
9. the process apparatus of molded glass according to claim 6, wherein this first thermal source comprises heat gun or infrared lamp.
10. the process apparatus of molded glass according to claim 6, wherein this second thermal source heats in heat conducting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810135643A CN101624257A (en) | 2008-07-07 | 2008-07-07 | Heating processing and equipment thereof for molded glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810135643A CN101624257A (en) | 2008-07-07 | 2008-07-07 | Heating processing and equipment thereof for molded glass |
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| Publication Number | Publication Date |
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| CN101624257A true CN101624257A (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810135643A Pending CN101624257A (en) | 2008-07-07 | 2008-07-07 | Heating processing and equipment thereof for molded glass |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073173A (en) * | 2013-01-16 | 2013-05-01 | 张家港市光学仪器有限公司 | Aspherical glass lens manufacturing method |
| CN109956655A (en) * | 2017-12-22 | 2019-07-02 | 财团法人金属工业研究发展中心 | The heating device and heating means of metal moulded glass |
-
2008
- 2008-07-07 CN CN200810135643A patent/CN101624257A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073173A (en) * | 2013-01-16 | 2013-05-01 | 张家港市光学仪器有限公司 | Aspherical glass lens manufacturing method |
| CN109956655A (en) * | 2017-12-22 | 2019-07-02 | 财团法人金属工业研究发展中心 | The heating device and heating means of metal moulded glass |
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Open date: 20100113 |