CN104015276A - Manufacturing method of aspheric glass mold - Google Patents
Manufacturing method of aspheric glass mold Download PDFInfo
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- CN104015276A CN104015276A CN201410224086.6A CN201410224086A CN104015276A CN 104015276 A CN104015276 A CN 104015276A CN 201410224086 A CN201410224086 A CN 201410224086A CN 104015276 A CN104015276 A CN 104015276A
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- aspheric surface
- aspheric
- pallet
- astigmatism
- glass
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Abstract
The invention discloses a manufacturing method of an aspheric glass mold, which comprises the following steps: designing and determining the corresponding surface parameter of the astigamatic aspheric mole, designing and determining the surface parameter of an aspheric pallet 2 and the surface parameter of an astigmatism glass blank before softening, making the astigmatism blank by a cold working technology, placing the astigmatism glass blank on the aspheric pallet, heating to the corresponding softening temperature in a graded mode, insulating under vacuum, then cooling to room temperature in the graded mode, processing the contact surface of the astigmatism glass blank and the aspheric pallet to a spherical surface, and finally obtain the mold used for astigmatism aspheric resin spectacle lens which is characterized in that convex surface is the astigmatism aspheric surface and the recessed surface is the spherical surface. The manufacturing method of the aspheric glass mold has the beneficial effects that the cost is saved, the processing difficulty is greatly reduced, consistency of the mold is high, local error is good, and the high frequency error of the surface is low.
Description
Technical field
The present invention relates to a kind of preparation method of aspheric surface glass mold, for sized non-spherical resin lens in astigmatism.
Background technology
Non-technology in astigmatism, be called in the world ATORIC technology, it is so-called toroid on optics, inner surface in eyeglass band astigmatism carries out different aspheric surface designs for ball light and post light both direction exactly, and control the optical property in middle transition area simultaneously, thereby reach the effect that the optical property in the different luminosity region on same eyeglass is optimized respectively, this effect will obviously expand astigmatic lens vision clear area, especially for astigmatism degree, surpass the eyeglass of 1.00D.
In the world, general way is, adopts free form surface Ultraprecision Machining, comprising: scanning Machining Technology (RG/RM), fast tool servo technology (FTS) and at a slow speed supporting plate servo techniques (S3) etc.Obviously, this type of process equipment price is high, and is essentially foreign-made monopolization, thereby has caused two aspherical lens or single interior high market price of aspherical lens, is unfavorable for product promotion and dominates the market.
In prior art, in common astigmatism, sized non-spherical resin lens comprises with mould making method computer-controlled high accuracy cutting technology, grinding technique and Ultraprecise polished (grinding) technology of adopting.Ultraprecise polished is the extremely slow a kind of processing method of process velocity, when the surface roughness of part requires when very high, if while adopting the method for forced feed cut or carry out grinding, its form accuracy will directly be subject to the impact of machine tool feed positioning precision, Ultraprecise polishedly can obtain the machining accuracy that is better than 0.01 μ m.
With single-point control, remove the finishing method of thickness and can manufacture sized non-spherical resin lens mould in high-precision astigmatism, compare with die processing method with general astigmatic sphere resin eyeglass, the bothersome effort of this processing method, and make in this way sized non-spherical resin lens mould in astigmatism, in the astigmatism of making, sized non-spherical resin lens is used surface high frequency error severity many of mould than astigmatic sphere resin eyeglass with the high frequency error of die surface.
The die forming of glass is the best miniaturized component production in enormous quantities method that replaces cutting, grinding, attrition process lens, prism.Moulding technology be the temperature in mould is controlled to the following softening temperature of glass transition temperature of punching press more than, in mould, enter the glass of mobility, press molding, and keep this state more than 20 seconds, until the glass temperature being shaped is evenly distributed, obtain thus the interior sized non-spherical resin lens mould of the astigmatism close with mould and die accuracy.
Yet, this die forming method, in the astigmatism of acquisition, non-resin lens contacts with mould with the surface of mould, therefore needs high-precision aspheric surface polishing, thereby very difficult and time-consuming when carrying out Mould Machining.
Therefore, be badly in need of a kind of improved technology and solve existing this problem in prior art.
Summary of the invention
The invention provides that a kind of fabrication process condition requirement is lower, the preparation method of the aspheric surface glass mold that can obtain high surface smoothness.
The technical solution used in the present invention is:
A preparation method for aspheric surface glass mold, comprises the following steps:
(1) the optics requirement of sized non-spherical resin lens in the astigmatism of preparing according to need, designs and determines the correspondingly surface parameter of astigmatic aspherical module;
(2) glass elements, under himself Action of Gravity Field, fits tightly with aspheric surface pallet, the surface parameter of design definite aspheric surface pallet and softening before the surface parameter of diffusing glass blank;
(3) utilize numerical control lathe wheeled litter manufacture-illegal sphere pallet, cold machining process is made astigmatic blank;
(4) diffusing glass blank is placed on aspheric surface pallet, ladder is warmed up to corresponding softening temperature, vacuum heat-preserving, and then ladder is cooled to room temperature;
(5) face contacting with aspheric surface pallet is processed as to sphere, finally obtaining convex surface is astigmatic aspheric surface, sized non-spherical resin lens mould in the astigmatism that concave surface is sphere.
Aspheric surface pallet designs for convex aspheric surface in described step (3), and opens the aperture that runs through front and rear surfaces that diameter is 0.5 ~ 2mm, and quantity is 6 ~ 18.
During the middle vacuum softening of described step (4), vacuum is ﹣ 0.095 ~-0.098 MPa, and vacuum time is 5 ~ 10 minutes, is incubated 10 ~ 40 minutes, and softening temperature is 650-700 ℃.
Described aspheric surface pallet adopts ceramic material to make.
The invention has the beneficial effects as follows: the cost of saving, greatly reduce difficulty of processing, the uniformity of mould is high, and local error is good, and surface high frequency error is low.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the side view that the present invention is out of shape front astigmatic blank meridian direction.
Fig. 2 is the side view that the present invention is out of shape front astigmatic blank vertical direction.
Fig. 3 is the side view that the present invention is out of shape rear astigmatic blank meridian direction.
Fig. 4 is the side view that the present invention is out of shape rear astigmatic blank vertical direction.
Wherein: 1, astigmatic blank, 2, aspheric surface pallet.
The specific embodiment
As Figure 1-4, the preparation method of a kind of aspheric surface glass mold of the present invention, comprises the following steps:
(1) first set one group of astigmatism roughcast warehouse, the parameter of mould for non-resin lens in the astigmatism of preparing according to need, in making every effort to thermoforming process on the basis of blank variable quantity minimum, utilize glass elements to change the equal principle of front and back volume and obtain the face type data of desirable astigmatic blank 1 and the face type data of aspheric surface pallet 2, in astigmatic roughcast warehouse, select accordingly immediate astigmatic blank 1, then carry out back substitution calculating, obtain the face type data of the aspheric surface pallet 2 of actual employing;
(2) based on glass under certain condition in soft state, glass elements, under himself Action of Gravity Field, fits tightly with aspheric surface pallet 2, the surface parameter of design definite aspheric surface pallet 2 and softening before the surface parameter of diffusing glass blank;
(3) adopt conventional sphere technique to make astigmatic blank 1, utilize numerical control lathe wheeled litter manufacture-illegal sphere pallet 2, aspheric surface pallet 2 is for convex aspheric surface designs, and opens the aperture that runs through front and rear surfaces that diameter is 1mm, quantity is 10, and cold machining process is made astigmatic blank 1;
(4) diffusing glass blank is placed on aspheric surface pallet 2, ladder is warmed up to corresponding softening temperature, vacuum heat-preserving, and vacuum is ﹣ 0.097MPa, and vacuum time is 6 minutes, is incubated 30 minutes, and softening temperature is 680 ℃, and then ladder is cooled to room temperature;
(5) face contacting with aspheric surface pallet 2 is processed as to sphere, finally obtaining convex surface is astigmatic aspheric surface, sized non-spherical resin lens mould in the astigmatism that concave surface is sphere.
Above-mentioned aspheric surface pallet 2 adopts ceramic materials to make, and for aspheric surface pallet 2, should select in principle good permeability, thermal deformation is little, hot property is stable, dysgeogenous refractory material, generally to adopt high temperature resistant weatherproof ceramic material to be advisable.
In the astigmatism of this technical scheme, sized non-spherical resin lens mould is sized non-spherical resin lens mould in curved month type astigmatism.Its convex surface is aspheric surface, and its aspheric surface descriptive equation is
Wherein: z is the rise at x point place, c=1/R, k is conic constant, and A2 – A16 is high-order term, and concave surface number 1 is according to position:
c1=0.003945
k1=20.571
A4=1.7233e-005
A6=-9.7003e-008
A8=2.6821e-010
A10=-3.960e-013
A12=3.2093e-016
A14=-1.3459e-019
A16=2.2828e-023
c2=0.003945
k2=20.571
B4=1.7233e-005
B6=-9.7003e-008
B8=2.6821e-010
B10=-3.960e-013
B12=3.2093e-016
B14=-1.3459e-019
B16=2.2828e-023
Its convex surface is the sphere of R145, and thickness is 5.
In making every effort to thermoforming process, on the basis of blank variable quantity minimum, utilize glass elements to change the equal principle of front and back volume, through calculating, use the chunk glass of following requirement:
Upper surface (concave surface) radius of curvature is: 80, and lower surface (convex surface) radius of curvature is: 100, thickness is 8;
Obtain describing the aspheric surface parameter of tray surface simultaneously:
c=1/120；
k=0；
A4=+9.25e-7；
A6=-1.322e-10；
A8=+1.38e-13；
A10=-4.045e-17；
A12=0；
A14=0；
A16=0；
The present invention adopts contactless thermoforming process to realize the making of mould for sized non-spherical resin lens in astigmatism, without high accuracy CNC Mill Grinding Machine Tool of Making Aspheric Surfaces, also without high-precision aspheric polishing machine; Method of the present invention is different from hot-pressing technique, the aspheric surface face type of hot-pressing technique element contacts with mould, and the aspheric surface face type of the inventive method element does not contact with mould, thereby, its surface smoothness depends on that astigmatism adds the surface smoothness in man-hour, irrelevant with aspheric mould or pallet, greatly reduces thus difficulty of processing, and at high temperature, the micro-crack on blank surface convergence automatically; Because the uniformity of astigmatic blank 1 is easily controlled, make sized non-spherical resin lens in the astigmatism obtaining and use the uniformity of mould high; Sized non-spherical resin lens mould in the astigmatism that the present invention obtains, surface smoothness is higher than conventional method, and, sized non-spherical resin lens mould in the astigmatism of making by this method, face type error p-v is in 5 μ m, and local error is good, and surface high frequency error is low.
Claims (4)
1. a preparation method for aspheric surface glass mold, is characterized in that: comprise the following steps:
(1) the optics requirement of sized non-spherical resin lens in the astigmatism of preparing according to need, designs and determines the correspondingly surface parameter of astigmatic aspherical module;
(2) glass elements, under himself Action of Gravity Field, fits tightly with aspheric surface pallet, the surface parameter of design definite aspheric surface pallet and softening before the surface parameter of diffusing glass blank;
(3) utilize numerical control lathe wheeled litter manufacture-illegal sphere pallet, cold machining process is made astigmatic blank;
(4) diffusing glass blank is placed on aspheric surface pallet, ladder is warmed up to corresponding softening temperature, vacuum heat-preserving, and then ladder is cooled to room temperature;
(5) face contacting with aspheric surface pallet is processed as to sphere, finally obtaining convex surface is astigmatic aspheric surface, sized non-spherical resin lens mould in the astigmatism that concave surface is sphere.
2. the preparation method of a kind of aspheric surface glass mold according to claim 1, is characterized in that: in described step (3), aspheric surface pallet designs for convex aspheric surface, and opens the aperture that runs through front and rear surfaces that diameter is 0.5 ~ 2mm, and quantity is 6 ~ 18.
3. the preparation method of a kind of aspheric surface glass mold according to claim 1, it is characterized in that: during the middle vacuum softening of described step (4), vacuum is ﹣ 0.095 ~-0.098 MPa, and vacuum time is 5 ~ 10 minutes, be incubated 10 ~ 40 minutes, softening temperature is 650-700 ℃.
4. the preparation method of a kind of aspheric surface glass mold according to claim 1, is characterized in that: described aspheric surface pallet adopts ceramic material to make.
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| CN201410224086.6A CN104015276A (en) | 2014-05-24 | 2014-05-24 | Manufacturing method of aspheric glass mold |
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| CN201410224086.6A CN104015276A (en) | 2014-05-24 | 2014-05-24 | Manufacturing method of aspheric glass mold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297943A (en) * | 2014-10-09 | 2015-01-21 | 河南工业职业技术学院 | Optical glass progressive multi-focal lens as well as manufacturing method and application thereof |
| CN111847849A (en) * | 2020-07-31 | 2020-10-30 | 苏州新吴光电科技有限公司 | Glass hot bending process and application of glass hot bending process in 3D glass preparation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008221720A (en) * | 2007-03-14 | 2008-09-25 | Ito Kogaku Kogyo Kk | Glass mold for eyeglass lens, its manufacturing process, and manufacturing process of eyeglass lens |
-
2014
- 2014-05-24 CN CN201410224086.6A patent/CN104015276A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008221720A (en) * | 2007-03-14 | 2008-09-25 | Ito Kogaku Kogyo Kk | Glass mold for eyeglass lens, its manufacturing process, and manufacturing process of eyeglass lens |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297943A (en) * | 2014-10-09 | 2015-01-21 | 河南工业职业技术学院 | Optical glass progressive multi-focal lens as well as manufacturing method and application thereof |
| CN111847849A (en) * | 2020-07-31 | 2020-10-30 | 苏州新吴光电科技有限公司 | Glass hot bending process and application of glass hot bending process in 3D glass preparation method |
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