CN101386465A

CN101386465A - Mould of moulded glass

Info

Publication number: CN101386465A
Application number: CNA200710153844XA
Authority: CN
Inventors: 陈永逸
Original assignee: Etai Precision Co Ltd Vg
Current assignee: Etai Precision Co Ltd Vg
Priority date: 2007-09-13
Filing date: 2007-09-13
Publication date: 2009-03-18

Abstract

The invention provides a mould for molding glass, which uses disk glass as material and comprises a cavity group composed of an upper cavity and a lower cavity, a sleeve group comprising an upper cavity sleeve and a lower cavity sleeve which are sheathed outside the upper cavity and the lower cavity, and a lens positioning sleeve arranged between the upper cavity sleeve and the lower cavity sleeve. The inner diameter of the lens positioning sleeve approaches the outer diameter of glass material, thereby being capable of accurately positioning the glass material. Furthermore, the molded lens does not require coring operation so as to be capable of effectively reducing production costs and also meeting the requirements of high-precision molded glass lenses, and the mould is particularly applicable to the production of convex and concave lenses.

Description

The mould of moulded glass

Technical field

The present invention is relevant with the technical field of device for shaping glass, more detailed relates to a kind of mould that is suitable for making the moulded glass (Molding Glass) of concave-convex type eyeglass.

Background technology

The model of high-accuracy glass must be taken into account the precision of mould and glass material, and the glass material need be shaped to solid shape in advance conveniently to place in the mould and to have avoided situations such as inclination, off-centre, and its surface also must have the optical surface grade can reach the requirement of finished product.Glass material commonly used mainly contains glass sphere, glass preform, approximate spheric glass and plectane glass etc., and its scope of application is respectively arranged.

Use glass sphere to be accurately controlling dimension as the advantage of material, but mould model for bi-concave type or planoconcave type eyeglass, glass sphere can't be located in mould, even use and to guarantee still that on the concave surface die of convex-surface type eyeglass glass sphere is positioned the positive center of die, therefore for the less die of die curvature of centre, behind the mould model of being everlasting, need the back segment core to get operation.

And use glass preform on making, to have bigger dimensional tolerances, yet when inserting in the mould, glass preform if the relative position of uncontrollable mass center and mold center, will cause also in moulding process that the eyeglass thickness differs, stress distribution inequality even the moulding of optics effective area fully.And be not the glass preform that each glass material can be made optical-grade.

Then cost is much higher relatively as the glass material if use approximate spheric glass, is common in the moulding of high unit price, large-size glass eyeglass.

And use plectane glass just not use die core sleeves in the unrestraint die for molding of glass outer, yet die core sleeves also possesses the correcting effect of die and mould insulation up and down.The model eyeglass that uses in the digital camera camera lens in early days simultaneously then is sphere as aspheric surface, another side in two optical surface usually.Because the multi-disc eyeglass is arranged in lens group, lens orientation to each other is extremely important, must guarantee that each center of lens is on same optical axis.Core after the moulding of model eyeglass is got operation, if note aspheric positioning instant can, the centre of sphere of sphere drops on the optical axis naturally.But along with the downsizing of Lens, having more enforcement is to adopt double-sized non-spherical, and two existing off-centre of optical surfaces can't be got the operation eliminating at follow-up core during therefore as if moulding.In addition, core is got operation and is in fact still had the problems must be to be solved, and for example core is got clamping fixture and can be caused eccentric error, crushes glass-mirror, increases the grinding miller cost, increase and make flow process, expend man-hour etc.

Summary of the invention

In view of this, main purpose of the present invention is promptly providing a kind of mould of moulded glass, and it can make the glass material accurately locate and slippage, eccentric phenomenon can not take place when mould model, and can reach and exempt from the effect that core is got operation.

For reaching aforesaid purpose, the invention provides a kind of mould of moulded glass, use plectane glass to be material, include the die group, it comprises upper cores and reaches die down; And the sleeve group, it comprises upper cores sleeve and following die core sleeves, is placed on respectively outside this upper cores and the following die, and the lens orientation sleeve is positioned between this upper and lower die core sleeves, and its internal diameter is close with glass material external diameter, in order to accurate Locating Glass material.

By such scheme as can be seen, the mould of moulded glass provided by the present invention, it not only can make the glass material accurately locate and the phenomenon of slippage can moulding not take place the time, also can reach and exempt from the effect that core is got operation, and can reduce glass material manufacturing cost in a large number, and still meet the employed requirement of high-accuracy glass model eyeglass.

Description of drawings

The combination synoptic diagram of Fig. 1 a preferred embodiment of the present invention;

The action synoptic diagram of the state of the demonstration formed glass of Fig. 2 a preferred embodiment of the present invention;

The combination synoptic diagram of another preferred embodiment of Fig. 3 the present invention;

The combination of another preferred embodiment of Fig. 4 the present invention and action synoptic diagram;

Fig. 5 the present invention is the combination synoptic diagram of a preferred embodiment again.

Embodiment

Below, lift the some preferred embodiments of the present invention, and conjunction with figs. is described in further detail as the back:

See also shown in Figure 1ly, the mould 10 of the moulded glass of a preferred embodiment of the present invention can be used for the moulding of plectane glass material 20, is made of die group 12 and sleeve group 14.

This die group 12 has corresponding upper cores 22 and reaches die 24 down, and this upper cores 22 is respectively equipped with

molding surface

23,25 with the corresponding end of following die 24.

This sleeve group 14, formed with lens orientation sleeve 30 by upper cores sleeve 26, following die core sleeves 28, this upper cores sleeve 26 is placed on upper cores 22 outsides, this time die core sleeves 28 is placed on down die 24 outsides, one end of these upper and lower die

core sleeves

26,28 corresponding lens orientation sleeves 30 is respectively equipped with fitting portion 261,281, recessed, use so that this lens orientation sleeve 30 can be rabbeted between the fitting portion 261,281 that is positioned upper and lower die core sleeves 26,28.The base this, this upper and lower

die core sleeves

26,28,

lens orientation sleeve

30 and 22,24 of upper and lower dies then form chamber 32.And the internal diameter of this upper and lower

die core sleeves

26,28 can be made as equal or different, and present embodiment is identical internal diameter.

Whereby, the operating method of this mould 10 of the present invention is as follows:

When inserting glass material 20 in the chamber 32, because these glass material 20 external diameters are close with lens orientation sleeve 30, and these glass material 20 tops, bottom side and last, following die

core sleeves

26,28 the end, it is plane that the top side all is, thereby can accurately locate and the situation of great inclination or skew can not take place, the application of force and glass deformation are able to evenly in the process of extruding glass material 20 moulding when this upper cores 22 moves down, and, consider the thermal expansion coefficients difference of this glass material 20 and lens orientation sleeve 30 materials in advance, when being warming up to the model temperature, make glass material 20 external diameters be able to lens orientation sleeve 30 internal diameter differences within preset value, the application of force is able to be able in certain limit of error according to the setting of mould and die accuracy at eyeglass moulding centroid axle after the glass deformation and eyeglass outer rim central shaft in moulding process, as shown in Figure 2, thus, the cooled eyeglass of moulding does not promptly need core to get processing.

In addition, 25 of the molding surface of these glass material 20 bottom sides and following die 24 have a distance before the eyeglass moulding, and the center of underside of this glass material 20 can make contact to profile 25 centers earlier in moulding process, thereby need not vacuumize.As for the stroke that presses down of this upper cores 22, can be that the top 221 of this upper cores 22 touches upper cores sleeve 26 and promptly stops, perhaps using the outer sleeve of setting up 16 to control the stroke that presses down of upper cores 22, as shown in Figure 3.

As from the foregoing, the shortcoming that the glass skew causes producing substandard product not only can not take place for the accurate location of plectane glass material in this mould 10 of the present invention, and, do not need core to get the processing operation, can avoid eyeglass after the moulding to be held the situation that causes optical surface to be touched and take place.

Secondly, as shown in Figure 4, this lens orientation sleeve 30 can be positioned fitting portion 261 bottoms (upper cores sleeve 26 is butt glass material 20) of upper cores sleeve 26 earlier before the model pressurization, and and reserve appropriate gap between these fitting portion 261 the inners, then this upper cores sleeve 26 has suitable space slightly to descend when the model process is carried out, thereby compresses the outer edge thickness of this glass material 20.

Moreover; the end of this upper and lower die

core sleeves

26,28, top side contacted with the glass material in the model processing procedure midium or long term, if generation glass residue sticks or reacts, owing to be the plane of exposing all; therefore grinding and polishing is removed the glass residue easily, or plating protective membrane in advance prevents.And these lens orientation sleeve 30 inwalls can adopt protective membrane to prevent and glass material reaction, or make with the material that is difficult for reaction, is easy to change, price is low, as graphite.

As shown in Figure 5, lens orientation sleeve 30 inwalls of the present invention also can also be concaved with flash district 301, use so that can be incorporated into lens orientation sleeve 30 inboards after placing these lens orientation sleeve 30 interior glass materials 20 to be shaped to eyeglass.

And this mould 10 of the present invention also can adopt plan-convex mirror glass material except adopting plectane glass material, at this moment, the plane of this plan-convex mirror glass material is adhered on down die core sleeves 28 top sides.

In sum, the mould of moulded glass provided by the present invention, it not only can make the glass material accurately locate and the phenomenon of slippage can moulding not take place the time, more can reach and exempt from the effect that core is got operation, and can reduce glass material manufacturing cost in a large number, and still meet the employed requirement of high-accuracy glass model eyeglass.

Claims

1. the mould of a moulded glass is characterized in that, includes:

The die group comprises upper cores and reaches die down; And

The sleeve group comprises upper cores sleeve and following die core sleeves, is placed on this upper cores and the following die outside respectively;

In order to the lens orientation sleeve of Locating Glass material, be positioned between this upper and lower die core sleeves, its internal diameter is close with glass material external diameter.

2. the mould of moulded glass according to claim 1 is characterized in that, the corresponding lens orientation telescopic of described upper and lower die core sleeves one end is respectively equipped with so that this lens orientation sleeve is positioned the fitting portion between the fitting portion of upper and lower die core sleeves.

3. as the mould of moulded glass as described in the claim 2, it is characterized in that described each fitting portion is provided with for recessed.

4. the mould of moulded glass according to claim 1 is characterized in that, described lens orientation sleeve lining also is provided with so that the glass material to form is the flash district that can be incorporated into lens orientation sleeve inboard behind the eyeglass.

5. the mould of moulded glass according to claim 1 is characterized in that, described glass material adopts plectane glass material.

6. the mould of moulded glass according to claim 1 is characterized in that, described lens orientation sleeve lining adopt protective membrane or not can with the material of glass material reaction.