CN111847841A - Precision mould pressing die structure for one-step forming of glass lenses - Google Patents
Precision mould pressing die structure for one-step forming of glass lenses Download PDFInfo
- Publication number
- CN111847841A CN111847841A CN202010676708.4A CN202010676708A CN111847841A CN 111847841 A CN111847841 A CN 111847841A CN 202010676708 A CN202010676708 A CN 202010676708A CN 111847841 A CN111847841 A CN 111847841A
- Authority
- CN
- China
- Prior art keywords
- mould
- mould core
- mold
- core
- ring
- 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.)
- Pending
Links
- 239000011521 glass Substances 0.000 title claims abstract description 38
- 238000003825 pressing Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000010937 tungsten Substances 0.000 claims abstract description 30
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 30
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000011162 core material Substances 0.000 abstract description 106
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000843 powder Substances 0.000 description 6
- 239000010941 cobalt Substances 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention designs a glass lens one-time molding precision mould pressing structure, which selects tungsten steel material or ceramic material with thermal expansion coefficient slightly lower than that of the mould, the specific value of the selected material thermal expansion coefficient is determined to be optimal according to the external dimension of the mould core, so that the mould is ensured to have an easy assembly gap of 4-6 microns when assembled at normal temperature, when the glass reaches the softening temperature, the assembly gap is only left with a single side of 0.3-0.7 micron, the material selectivity of the annular ring is higher, the design selects tungsten steel material with thermal expansion coefficient larger than that of the mould core material or the same material as the mould core sleeve, the specific value of the selected material thermal expansion coefficient is determined to be optimal according to the external dimension of the mould core, so that the mould is ensured to be assembled easily at normal temperature, when the glass reaches the softening temperature, the assembly gap can be left with +/-0.5 micron, the same material as the, adopt interference fit, assemble together with the mode of hot dress, reach the integral type effect of type ring and mould benevolence cover.
Description
Technical Field
The invention belongs to the field of glass mould pressing, and particularly relates to a precision mould pressing structure for one-step forming of a glass lens.
Background
At present, the eccentricity requirement of the mobile phone lens is very high, the injection molding lens is mainly used as the mainstream, but with the higher and higher requirements of consumers on the camera shooting quality of the mobile phone, the requirements of the lens pixel are gradually improved, the traditional injection molding lens can not completely meet the pixel requirement of the mobile phone lens, and therefore the injection molding lens needs to be replaced by the glass lens. However, because the mold structure of the glass molded lens has special characteristics and the mold material has good processability, and the mold manufacturing precision and the assembling precision of the glass molded lens have not met the requirements of the mobile phone lens on the mold, the glass molded mobile phone lens cannot form an industry of mass production.
Disclosure of Invention
In order to solve the problems, the invention provides a one-step forming precision mould pressing structure of a glass lens.
The invention adopts the following technical scheme: a glass lens one-step forming precision mould pressing structure comprises an upper mould core, a lower mould core, a mould core sleeve and a mould ring, wherein the lower part of the upper mould core and the upper part of the lower mould core are sleeved by the mould core sleeve, the mould ring is arranged between the upper mould core and the lower mould core, the upper mould core and the lower mould core are made of cobalt-free ultrafine grain hard alloy, the expansion coefficient of the alloy material is not more than 4.9 x 10 (-6) mm/mm/DEG C, the mould core sleeve is made of tungsten steel material or ceramic material with the thermal expansion coefficient smaller than that of the upper mould core and the lower mould core, the assembly gap between the upper mould core and the mould core sleeve is 4-6 micrometers at normal temperature, and when glass reaches the softening temperature, the assembly gap between the upper mould core and the lower mould core and the mould core sleeve is controlled to be 0.3.
Preferably, the mold is in the form of a ring separated from a core sleeve.
Preferably, the annular ring is made of tungsten steel material with expansion coefficient larger than that of the upper mold core and the lower mold core, and when the glass reaches the softening temperature, the assembling clearance of the mold is controlled within +/-0.5 micron.
Preferably, the mould adopts a mould core sleeve integrated with a mould ring, and the mould ring adopts the same material as the mould core sleeve.
Under the condition that the external pressure is not changed, the volume and the size of the object are increased along with the increase of the temperature, namely, the expansion phenomenon of the object caused by the change of the temperature is called thermal expansion, the design is applied to the principle, and the used linear expansion formula is as follows: lt ═ Lo [1+ α (Tt-To) ], Lo: pre-linear expansion dimension; and Lt: size after linear expansion; tt is the temperature of the object before linear expansion; to: the temperature of the object at the time of linear expansion; α: coefficient of linear expansion; in the mould pressing process of the mould, the outer diameters of the upper mould core and the lower mould core are increased along with the rise of the temperature, the inner diameter of the mould core sleeve is also increased along with the rise of the temperature, the mould core sleeve is taken as a unit, and the thickness of the mould core sleeve is also changed along with the rise of the temperature.
Because tungsten steel (hard alloy) has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, particularly high hardness and wear resistance, the tungsten steel is basically kept unchanged even at the temperature of 500 ℃, and the tungsten steel still has very high hardness at the temperature of 1000 ℃, a glass mold is mostly made of tungsten steel materials so as to ensure the surface appearance and precision of lenses, and simultaneously ensure that the mold has long enough service life and affects three main indexes of the tungsten steel materials: a. the particle size of the tungsten steel powder; b. pore gaps when the tungsten steel powder is combined; c. the content of a binding agent cobalt used in the combination of tungsten steel powder, the upper die core and the lower die core are usually made of tungsten steel materials without cobalt, the linear expansion coefficient of the materials is generally 4.9 x 10-6 mm/mm/DEG C, the material of the die core sleeve does not consider the surface quality problem of a glass lens, so that the selectivity is high, in order to ensure that the clearance between the die core sleeve and the die core can be almost eliminated when the glass lens is molded at a high temperature, the tungsten steel material or the ceramic material with the slightly lower thermal expansion coefficient than that of the die is selected in the design, the specific numerical value of the selected material thermal expansion coefficient is determined to be optimal according to the external dimension of the die core, the easy assembly clearance of 4-6 micrometers is ensured when the die is assembled at normal temperature, when the glass reaches the softening temperature, the assembly clearance is only unilateral 0.3-0.7 mu m, the material selectivity is high, the design selects tungsten steel material with thermal expansion coefficient larger than that of the mold core material or the same material as the mold core sleeve, the specific value of the selected material thermal expansion coefficient is determined to be optimal according to the shape and the size of the mold core, the mold is ensured to be assembled easily at normal temperature, when the glass reaches the softening temperature, the assembling clearance is only +/-0.5 mu m, the same material as the mold core sleeve can also be selected, interference fit is adopted, and the mold ring and the mold core sleeve are assembled together in a hot-assembling mode, so that the integrated effect of the mold ring and the mold core sleeve is achieved.
Drawings
FIG. 1 is a mold for separating a mold ring and a mold core sleeve of a one-step molding thin-edged glass molded lens;
FIG. 2 is a mold for separating a mold ring and a mold core sleeve of a one-step molded thick-sided glass molded lens;
FIG. 3 is a mold for molding thin-edged glass molded lenses in one piece with a mold insert and a mold ring;
FIG. 4 shows a mold for molding a thick-sided glass molded lens in one piece with a mold insert and a mold ring.
In the figure: 1. an upper die core; 2. a lens; 3. a lower die core; 4. a die core sleeve; 5. a swage ring.
Detailed Description
The technical solutions of the present invention are further described below with reference to specific examples, but the scope of the present invention is not limited thereto.
A glass lens one-step forming precision mould pressing structure comprises an upper mould core 1, a lower mould core 3, a mould core sleeve 4 and a shape ring 5, wherein the lower part of the upper mould core 1 and the upper part of the lower mould core 3 are sleeved by the mould core sleeve 4, the shape ring 5 is arranged between the upper mould core 1 and the lower mould core 3, the upper mould core 1 and the lower mould core 3 are made of cobalt-free ultrafine crystal grain hard alloy, the expansion coefficient of the alloy material is not more than 4.9 x 10 (-6) mm/mm/° C, the mould core sleeve 4 is made of tungsten steel material or ceramic material with the thermal expansion coefficient smaller than that of the upper mould core 1 and the lower mould core 3, the assembly gap between the upper mould core 1 and the lower mould core 3 and the mould core sleeve 4 is 4-6 micrometers at normal temperature, and when glass reaches the softening temperature, the assembly gap between the upper mould core 1 and the lower mould core 3 and the mould core sleeve 4.
Preferably, the mold is in the form of a ring 5 separated from a core sleeve 4.
Preferably, the annular ring 5 is made of tungsten steel material with expansion coefficient larger than that of the upper mold core 1 and the lower mold core 3, and when the glass reaches the softening temperature, the assembly clearance of the mold is controlled within +/-0.5 micron.
Preferably, the mould adopts a mould integrated with a mould core sleeve, and the mould 5 adopts the same material as the mould core sleeve 4.
In the figures 1 and 2, a mode that a ring is separated from a mold core sleeve is adopted, firstly, the processing difficulty is reduced, secondly, the universality of the mold core sleeve is increased so as to save the cost, the processing difficulty of the ring in the mode is slightly low, after one end surface is fixed, the inner diameter and the outer diameter can be simultaneously processed at one end, the coaxiality below 1 mu m can be ensured under the condition of better equipment precision and equipment condition, the design requires that the coaxiality is less than 1 mu m, the ring 5 with higher expansion rate, the upper mold core and the lower mold core and the mold core sleeve 4 with lower expansion rate are adopted, so that the whole set of mold has tighter matching at the molding temperature, and simultaneously, because the coaxiality of the inner diameter and the outer diameter of the ring 5 is higher, the aspheric surface of the upper mold core 1 and the lower mold core 3 and the coaxiality of the diameter are.
The requirement for the material and assembly of the mold ring is eliminated by the medium-sized ring integrated mold core sleeve in the figures 3 and 4, the processing difficulty of the mold ring is increased, the inner hole and the outer diameter of one end are firstly processed, the processed inner hole of the other end is fixed again, the verticality and the coaxiality of two sides can be ensured by a high-precision tool and an operation method when the mold is clamped again, the coaxiality and the verticality are required to be less than 1 mu m by the design, the upper mold core and the lower mold core with larger expansion rate and the ring integrated mold core sleeve 4 with smaller expansion rate are adopted, so that the mold core and the mold core sleeve are in closer fit, meanwhile, the coaxiality of the inner diameters of the upper mold core and the lower mold core is higher due to the size of the ring integrated mold core sleeve 4.
Under the condition that the external pressure is not changed, the volume and the size of the object are increased along with the increase of the temperature, namely, the expansion phenomenon of the object caused by the change of the temperature is called thermal expansion, the design is applied to the principle, and the used linear expansion formula is as follows: lt ═ Lo [1+ α (Tt-To) ], Lo: pre-linear expansion dimension; and Lt: size after linear expansion; tt is the temperature of the object before linear expansion; to: the temperature of the object at the time of linear expansion; α: coefficient of linear expansion; in the mould pressing process of the mould, the outer diameters of the upper mould core and the lower mould core are increased along with the rise of the temperature, the inner diameter of the mould core sleeve is also increased along with the rise of the temperature, the mould core sleeve is taken as a unit, and the thickness of the mould core sleeve is also changed along with the rise of the temperature.
Because tungsten steel (hard alloy) has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, particularly high hardness and wear resistance, the tungsten steel is basically kept unchanged even at the temperature of 500 ℃, and the tungsten steel still has very high hardness at the temperature of 1000 ℃, a glass mold is mostly made of tungsten steel materials so as to ensure the surface appearance and precision of lenses, and simultaneously ensure that the mold has long enough service life and affects three main indexes of the tungsten steel materials: a. the particle size of the tungsten steel powder; b. pore gaps when the tungsten steel powder is combined; c. the content of a binding agent cobalt used in the combination of tungsten steel powder, the upper die core and the lower die core are usually made of tungsten steel materials without cobalt, the linear expansion coefficient of the materials is generally 4.9 x 10-6 mm/mm/DEG C, the material of the die core sleeve does not consider the surface quality problem of a glass lens, so that the selectivity is high, in order to ensure that the clearance between the die core sleeve and the die core can be almost eliminated when the glass lens is molded at a high temperature, the tungsten steel material or the ceramic material with the slightly lower thermal expansion coefficient than that of the die is selected in the design, the specific numerical value of the selected material thermal expansion coefficient is determined to be optimal according to the external dimension of the die core, the easy assembly clearance of 4-6 micrometers is ensured when the die is assembled at normal temperature, when the glass reaches the softening temperature, the assembly clearance is only unilateral 0.3-0.7 mu m, the material selectivity is high, the design selects tungsten steel material with larger thermal expansion coefficient than the die core material or the same material as the die core sleeve. The specific value of the thermal expansion coefficient of the selected material is determined to be optimal according to the external dimension of the mold core, so that the mold is ensured to be assembled easily at normal temperature, and when the glass reaches the softening temperature, the assembling clearance is only +/-0.5 mu m. The material same as the die core sleeve can also be selected, interference fit is adopted, and the die core sleeve are assembled together in a hot-charging mode, so that the integrated effect of the annular sleeve and the die core sleeve is achieved.
In the description herein, references to the description of "one embodiment," "an example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. A glass lens one-step forming precision mould pressing structure is characterized by comprising an upper mould core, a lower mould core, a mould core sleeve and a ring, wherein the mould core sleeve sleeves the lower part of the upper mould core and the upper part of the lower mould core, the ring is arranged between the upper mould core and the lower mould core, the upper mould core and the lower mould core are made of cobalt-free ultrafine grain hard alloy, the expansion coefficient of the alloy material is not more than 4.9 x 10 (-6) mm/mm/° C, the mould core sleeve is made of tungsten steel material or ceramic material with the thermal expansion coefficient smaller than that of the upper mould core and the lower mould core, the assembly gap between the upper mould core and the mould core sleeve and the assembly gap between the lower mould core and the mould core sleeve are 4-6 micrometers at normal temperature, and when glass reaches the softening temperature, the assembly gap between the upper mould core and the mould.
2. The structure of the one-step forming precision press-molding mold for glass lenses according to claim 1, wherein: the mold adopts a mode that the mold ring is separated from the mold core sleeve.
3. The structure of the one-step forming precision press-molding mold for glass lenses according to claim 2, wherein: the ring is made of tungsten steel material with expansion coefficient higher than that of the upper mold core and the lower mold core, and the assembling clearance of the mold is controlled within +/-0.5 micron when the glass reaches the softening temperature.
4. The structure of the one-step forming precision press-molding mold for glass lenses according to claim 1, wherein: the mould adopts a mould core sleeve integrated with a mould ring, and the mould ring adopts the same material as the mould core sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676708.4A CN111847841A (en) | 2020-07-14 | 2020-07-14 | Precision mould pressing die structure for one-step forming of glass lenses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676708.4A CN111847841A (en) | 2020-07-14 | 2020-07-14 | Precision mould pressing die structure for one-step forming of glass lenses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111847841A true CN111847841A (en) | 2020-10-30 |
Family
ID=72984817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010676708.4A Pending CN111847841A (en) | 2020-07-14 | 2020-07-14 | Precision mould pressing die structure for one-step forming of glass lenses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111847841A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299687A (en) * | 2020-11-18 | 2021-02-02 | 南京迈得特光学有限公司 | Multi-cavity aspheric surface mould pressing one-step forming method for infrared chalcogenide glass |
| CN114772905A (en) * | 2022-04-29 | 2022-07-22 | 安徽光智科技有限公司 | Method for adjusting surface shape of aspheric surface precision mould pressing lens |
| CN115594389A (en) * | 2021-07-09 | 2023-01-13 | 华为技术有限公司（Cn） | Lens processing mold, compression molding equipment and manufacturing method of lens processing mold |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0386944A2 (en) * | 1989-03-08 | 1990-09-12 | Corning Incorporated | Molding apparatus and method |
| JPH09188529A (en) * | 1996-01-11 | 1997-07-22 | Asahi Optical Co Ltd | Device for forming optical element |
| CN110877239A (en) * | 2019-12-17 | 2020-03-13 | 东莞市凯融光学科技有限公司 | Polishing method of tungsten steel mold core and mold sleeve |
-
2020
- 2020-07-14 CN CN202010676708.4A patent/CN111847841A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0386944A2 (en) * | 1989-03-08 | 1990-09-12 | Corning Incorporated | Molding apparatus and method |
| JPH09188529A (en) * | 1996-01-11 | 1997-07-22 | Asahi Optical Co Ltd | Device for forming optical element |
| CN110877239A (en) * | 2019-12-17 | 2020-03-13 | 东莞市凯融光学科技有限公司 | Polishing method of tungsten steel mold core and mold sleeve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299687A (en) * | 2020-11-18 | 2021-02-02 | 南京迈得特光学有限公司 | Multi-cavity aspheric surface mould pressing one-step forming method for infrared chalcogenide glass |
| CN112299687B (en) * | 2020-11-18 | 2022-04-19 | 南京迈得特光学有限公司 | Multi-cavity aspheric surface mould pressing one-step forming method for infrared chalcogenide glass |
| CN115594389A (en) * | 2021-07-09 | 2023-01-13 | 华为技术有限公司（Cn） | Lens processing mold, compression molding equipment and manufacturing method of lens processing mold |
| CN114772905A (en) * | 2022-04-29 | 2022-07-22 | 安徽光智科技有限公司 | Method for adjusting surface shape of aspheric surface precision mould pressing lens |
| CN114772905B (en) * | 2022-04-29 | 2023-09-01 | 安徽光智科技有限公司 | Method for adjusting surface type of aspherical precision mould pressing lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111847841A (en) | Precision mould pressing die structure for one-step forming of glass lenses | |
| US6450696B1 (en) | Optical connector ferrules and method for production thereof | |
| CN102143813A (en) | Micro drill and fabricating method thereof | |
| US7780435B2 (en) | Injection molding apparatus having a sprue bushing for communication with a nozzle | |
| CN103524021B (en) | A kind of manufacture method of aspherical lens of glass accurate die pressing | |
| CN101363950A (en) | Lens cone and method for manufacturing same | |
| CN106735080B (en) | Continuous extrusion die for aluminum pipe | |
| JP2010126378A (en) | Mold for forming optical element | |
| JP4426910B2 (en) | Mold press mold, optical element manufacturing method, and mold press lens | |
| CN103611875A (en) | Impeller air-lock valve impeller rotor production process | |
| KR102025430B1 (en) | Lens molding apparatus using the weight increasing the thermal efficiency | |
| CN108381118B (en) | Preparation method of integrally-formed stainless steel insert structure | |
| CN108941415B (en) | Combined type punching die for bolt head and manufacturing method thereof | |
| CN202449983U (en) | Die-forming die | |
| CN219861046U (en) | Mold capable of directly molding infrared chalcogenide glass aspheric lens diffraction surface | |
| JP5059540B2 (en) | Optical element molding equipment | |
| JP5112120B2 (en) | Optical element manufacturing method and mold assembly for manufacturing the same | |
| CN105420630A (en) | Steel material for cold-working mould | |
| CN201702261U (en) | Ceramic pressing shield die | |
| JP2006176393A (en) | Molding die for molding press and method for manufacturing optical element | |
| KR20180132241A (en) | Composite drawing plug | |
| CN117139625A (en) | Brake disc green forming method | |
| CN201042726Y (en) | Automobile wheel mold with wearing coat | |
| CN221087262U (en) | Brake disc green compact forming die and forming press | |
| CN116462390A (en) | Mold capable of directly molding infrared chalcogenide glass aspheric lens diffraction surface and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201030 |
|
| RJ01 | Rejection of invention patent application after publication |