CN105948463A - Molding device and molding method for optical glass by edge dropwise feeding - Google Patents
Molding device and molding method for optical glass by edge dropwise feeding Download PDFInfo
- Publication number
- CN105948463A CN105948463A CN201610273945.XA CN201610273945A CN105948463A CN 105948463 A CN105948463 A CN 105948463A CN 201610273945 A CN201610273945 A CN 201610273945A CN 105948463 A CN105948463 A CN 105948463A
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- Prior art keywords
- optical glass
- heating
- mould
- bed die
- molding
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/08—Feeder spouts, e.g. gob feeders
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/08—Feeder spouts, e.g. gob feeders
- C03B7/094—Means for heating, cooling or insulation
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/08—Feeder spouts, e.g. gob feeders
- C03B7/094—Means for heating, cooling or insulation
- C03B7/096—Means for heating, cooling or insulation for heating
Abstract
The invention provides a molding device and a molding method for optical glass by edge dropwise feeding. The molding device can effectively control the problems of stripes and easy devitrification of the optical glass. The molding device for optical glass by edge dropwise feeding comprises a bottom die, a bracket, a rail trolley, a heating system and a preheating system, wherein the heating system controls the space temperature of molding; the preheating system heats the bottom part of the die; the bracket is arranged on the rail trolley; the bottom die is arranged on the bracket; the molding device also comprises a frame and a plug; and the bottom die, the frame and the plug constitute the molding die of the optical glass. The molding device provided by the invention can well meet the requirements of the process needed by edge molding of heavy-caliber optical glass, has flexible operation, is convenient to assemble, disassemble and replace, effectively improves optical homogeneity and stress of the heavy-caliber optical glass, is applicable to molding of the heavy-caliber optical glass in the forms of crowns, flint, lanthanides, fluorophosphates, etc., and has good effects on solving the problem of molding of low-viscosity and easy-devitrification optical glass of lanthanides, fluorophosphates, etc.
Description
Technical field
The present invention relates to tear drop shaped device and the forming method thereof of a kind of large-aperture optical glass, particularly relate to
And a kind of heavy caliber, little viscosity, the shaped device of easy crystallize optical glass and forming method thereof.
Background technology
Optical glass is after powder is molten into qualified glass, in order to make vitreous humour keep certain after hardening
Shape, it is necessary to use moulding process make glass by liquid to solid state transformation time gradually solidify its shape, at present,
The forming method of large-aperture optical glass mainly has following three kinds: 1) billot traction forming method: optical glass
In the molten state, through mould natural molding continuously or clap optical glass bar that is molded and that be cut into certain size
Material；2) casting forming method: optical glass is the most directly poured in mould, is cooled to institute
The structural glass needed；3) middle part tear drop forming method: vitreous humour instills in the middle part of mould through material leakage pipe, glass
Liquid is natural diffuses to form the heavy caliber glass similar with mold shape to surrounding.
At present, general in small-bore optical glass mainly use billot traction forming method to produce, the method master
The optical glass forming that bore to be applicable to is less, viscosity is bigger., crystallize little for viscosity is serious, material property
Short a series of optical glass, the billot width of billot traction molding is difficult to be molded into more than 180mm, thickness
Typically smaller than 30mm, after above specification, molding striped, crystallize cannot effectively control.Billot pours into
Type method is excessively simple, and the striped of casting process, bubble are difficult to control, and the optical homogeneity of glass is poor, very
Difficulty produces high uniformity, high-quality large-aperture optical glass.The middle part tear drop molding commonly used now
Method and technology is the most advanced, but this forming method exist all the time in technique in the middle part of with outside temperature difference mistake
Big situation, causes molding striped and easy devitrification problem, the mode that product can only use segmentation, select occur
Removing defect, specification is limited, and yields is extremely low.
Summary of the invention
The technical problem to be solved is to provide a kind of optical glass edge tear drop shaped device, this dress
Put and can effectively control the striped of optical glass and easy devitrification problem.
The present invention also provides a kind of forming method using above-mentioned optical glass edge tear drop shaped device.
The present invention solves technical problem the technical scheme is that optical glass edge tear drop shaped device,
Including bed die, bracket, small rail car, heating system and pre-heating system, it is empty that described heating system controls molding
Between temperature, described pre-heating system to mold bottom heat, described bracket is arranged on small rail car, the described end
Mould is arranged on bracket, also includes that frame and plug, described bed die, frame and plug constitute optical glass
Mould.
Further, the first preheating duration and degree of heating and the second preheating duration and degree of heating bottom the employing of described pre-heating system；Described add
Hot systems uses heating mantles, and described heating mantles hangs on furnace bottom, makes discharge nozzle be arranged in heating mantles, described
Being provided with heating element heater in heating mantles, temperature-controllable scope is 700-100 DEG C.
Further, described frame and plug are arranged on bed die, and frame is arranged around along bed die, described
Plug is arranged on the inner side of frame, and a side contacts of a vertical of plug and frame fixing.
Further, described bed die being provided with Embedded 2 removable arm-ties, described 2 arm-ties can
With pull-out or insertion, when pull-out, bed die forms perforate；Upon insertion, bed die forms closed pore.
Further, described bracket uses groined type double-decker.
Further, the inclined-plane of described plug is 50 °-70 ° with the angle of bed die upper surface.
Further, described plug uses heatproof, corrosion-resistant, to glass non-staining high purity graphite material system
Become.
Further, described bed die uses and is spelled by some capacity of heat transmission carborundum plates excellent, resistant to elevated temperatures
Connect and form, and reserved discharge gate, described bed die and horizontal direction have the angle of 5 °-7 °.
The forming method of optical glass edge tear drop, the method comprises the following steps: 1) vitreous humour passes through discharging
Pipe flow goes out, and is adjusted the temperature of discharge nozzle by heating system, makes the flow-control of discharge nozzle exist
0.9-1.3L/min；2) assemble after mould second preheating duration and degree of heating preheating, by small rail car along
Track moves horizontally and is moved to below discharge nozzle by mould；3) mould heats under heating mantles,
Push 2 arm-ties on bed die, closed mould discharge gate, start tear drop molding；4) the first preheating duration and degree of heating continues
Continuous heating, vitreous humour progressively spreads shop fixtures from the plug backward relative side convection current of rolling, and heating mantles power is put
In relatively high power, after shop fixtures completes, stop the heating of the first preheating duration and degree of heating, gradually reduce heating mantles simultaneously
Power；5) in mould, vitreous humour liquid level reaches target liquid level aftershaping and terminates, by moving track dolly
To track cooling sizing Accreditation Waiting Area, blown in the middle part of glass from top to bottom by air blowing heat sink, knot of blowing
Glass transfer in mould and mould to preheated annealing furnace will be annealed after bundle.
Further, step 4) described heating mantles power is reduced to 15KW from 30KW；Step 5) described in blow
Tolerance is 1-1.5NM3/ H, stands cooling 10-15 minute, stops blowing.
The invention has the beneficial effects as follows: the present invention can meet large-aperture optical glass edge molding institute well
Need technological requirement, flexible operation, it is simple to load and unload and change, it is possible to control large-aperture optical glass well long
There is a molding fringe technique difficult problem in the phase, can effectively control the devitrification problem of easy crystallize glass, improves heavy caliber glass
The optical homogeneity of glass and stress.The present invention is applicable to heavy caliber crown class, flint class, group of the lanthanides, fluorophosphoric acid
The molding of the optical glass of the types such as salt, to solving the little viscosity such as group of the lanthanides, fluorophosphate, the light of easy crystallize class
The formation problems learning glass has good effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention.
Fig. 2 is the structural representation of the square dies of apparatus of the present invention.
Fig. 3 is the structural representation of the polygon mould of apparatus of the present invention.
Fig. 4 is the structural representation of the circular die of apparatus of the present invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As it is shown in figure 1, the large-aperture optical glass tear drop shaped device of the present invention include bed die 1, frame 3,
Plug 4, mobile arm-tie 7, bracket 2, small rail car 11, heating system, pre-heating system.Frame 3 is with stifled
4 are arranged on bed die 1, and frame 3 is arranged around along bed die 1, and plug 4 is arranged on the interior of frame 3
Side, and a side contacts of a vertical of plug 4 and frame 3, and adopt and be screwed.Due to frame 3
Only side and there is no bottom surface, therefore, bed die 1, frame 3 and plug 4 constitute the mould of optical glass,
Bed die 1 and frame 3 can also be made of one structure.It is provided with Embedded 2 on bed die 1 removable to draw
Plate 7,2 arm-ties 7 can pull out or insert, and when pull-out, forms perforate on bed die 1；Upon insertion,
Form closed pore, as shown in Figure 2.Heating system uses heating mantles 5, and heating mantles 5 hangs on furnace bottom, makes discharging
Pipe 6 is arranged in heating mantles 5, is provided with heating element heater in heating mantles 5, and temperature-controllable scope is 700-100 DEG C,
Heating mantles 5 is used for ensureing molding space temperature.Bottom pre-heating system employing, the first preheating duration and degree of heating 9 and second is pre-
Showing tremendous enthusiasm 10, mold bottom is heated, it is provided that the temperature that mold bottom is certain, during solution vitreous humour shop fixtures
Diffusion problem.Bed die 1 arranges on carrier 2, and bracket 2 uses groined type double-decker, is positioned at middle part
Trave can be with discharge, and the trave of other positions can be double-deck as the gap of flame heating during heating bed die 1
Structure is easy to fork truck and is entered the glass on the mobile pallet of fork.Bracket 2 is arranged on small rail car 11, small rail car
11 can move horizontally along track.First preheating duration and degree of heating 9 is the dress in glass forming process to bed die heating
Putting, be fixed on below shaped device, the second preheating duration and degree of heating 10 is the preheating device before assembly jig molding, if
Put in track side.
In order to make the glass at middle part roll along both sides, the inclined-plane of plug 4 with the angle of bed die 1 upper surface is
50 °-70 °, owing to plug 4 is nearest apart from tear drop point, temperature is the highest herein, and therefore, plug 4 selects resistance to
High purity graphite material warm, corrosion-resistant, non-staining to glass is made；Bed die 1 uses and by some width is
The capacity of heat transmission of 100mm carborundum plate excellent, resistant to elevated temperatures is spliced, and reserved discharge gate, bed die 1
With the angle that horizontal direction has 5 °-7 °, structure low after height before being formed (is front by plug 4 side, with stifled
4 opposite direction sides are rear), make vitreous humour dispersal direction have a downward potential energy, be more beneficial for vitreous humour
Diffusion；Frame 3 can be square, polygon or circle, the most respectively with bed die 1 and plug 4 structure
Become square dies, as shown in Figure 2, it is also possible to be polygon mould, as it is shown on figure 3, can also is that circle
Shape mould, as shown in Figure 4.
Frame 3 is typically chosen rectangle, is so conducive to glass Convention diffusion, and it is by two pieces of L-type cast iron plates
Docking, on diagonal, 2 link with latch, it is easy to dismounting.
The large-aperture optical glass edge tear drop moulding technique of the present invention, comprises the following steps: 1) glass
Liquid is flowed out by discharge nozzle 6, for reducing vitreous humour diffusion during vitreous humour shop fixtures and bringing the duration of pouring
Crystallize, need to be adjusted the temperature of discharge nozzle 6, make the flow-control of discharge nozzle (6) exist by heating system
0.9-1.3L/min；2) mould after assembling preheats 5-10min at the second preheating duration and degree of heating 10, passes through
Small rail car 11 moves horizontally along track and moves to mould, below discharge nozzle 6, make discharge nozzle 6
With plug 4 at a distance of 30-50mm；3) mould is at 5 times heating 5-10min of heating mantles, pushes bed die 1
On 2 arm-ties 7, closed mould discharge gate, start tear drop molding；4) the first preheating duration and degree of heating 9 continues to add
Heat, vitreous humour progressively spreads shop fixtures from plug 4 backward relative side convection current of rolling, and heating mantles 5 power is put
In relatively high power 30KW, after shop fixtures completes, stop the heating of the first preheating duration and degree of heating 9, gradually reduce simultaneously and add
The power of heat cover 5, in whole casting process, heating mantles power is reduced to 15KW from 30KW；5) shaping mould
In tool, vitreous humour liquid level reaches target liquid level aftershaping and terminates, fixed by the cooling of moving track dolly 11 to track
Type Accreditation Waiting Area, is blown from top to bottom by air blowing heat sink in the middle part of glass, and air-blowing quantity is 1-1.5NM3/ H,
Stand cooling 10-15 minute, stop blowing, and by the heavy caliber glass transfer in mould and mould
Anneal in preheated annealing furnace.
In forming process, next block shaping device can be put in pre-heating system and preheat, treat previous block of light
Learn after glass molding completes and repeat operation.
In the forming method of the present invention, vitreous humour viscosity requirement is moored at 150-200, and temperature of glass liquid is higher than glass
Crystallize ceiling temperature.For meeting the diffusion of vitreous humour, by designing the pipe diameter size of discharge nozzle 6, adjust
The temperature of material pipe 6 so that it is flow reaches the flow required for molding.
The present invention uses the forming temperature that casting process is variable: need in forming process regarding vitreous humour shop fixtures thickness
Adjusting heating mantles 5 power at any time, along with shop fixtures thickness increases, heating mantles 5 power to gradually reduce, equilibrium
Whole process cast temperature field and thermal history, heating mantles 5 power presents and is distributed from high to low.This is because shop fixtures
Process is taken away amount of heat by mould, need to promote the diffusivity of glass, and therefore, shop fixtures process temperature wants height,
After shop fixtures completes, after vitreous humour diffusion promotes, heating mantles 5 power need to be reduced, control diffusion too fast, guide
Glass spreads in order.
The present invention uses the quickly middle part cooling provision in casting complete sizing waiting process: glass casting complete
After, glass presents the phenomenon that middle portion temperature is high, ambient temperature is low, and glass is non-conductor, need to be by external force
Heat radiation, makes temperature of glass liquid be rapidly separated crystallize district.The present invention by the way of blowing from top to bottom to glass
Blow in middle part.
Apparatus and method of the present invention is applicable to heavy caliber crown class, flint class, the type such as group of the lanthanides, fluorophosphate
The molding of optical glass, the little viscosity such as group of the lanthanides, fluorophosphate, the optical glass of easy crystallize class can be solved
Formation problems.
Claims (10)
1. optical glass edge tear drop shaped device, including bed die (1), bracket (2), small rail car (11),
Heating system and pre-heating system, described heating system controls molding space temperature, and described pre-heating system is to mould
Bottom-heated, described bracket (2) is arranged on small rail car (11), and described bed die (1) is arranged on torr
On frame (2), it is characterised in that: also include frame (3) and plug (4), described bed die (1), frame
(3) and plug (4) constitute optical glass mould.
2. optical glass edge tear drop shaped device as claimed in claim 1, it is characterised in that: described pre-
First preheating duration and degree of heating (9) and the second preheating duration and degree of heating (10) bottom hot systems employing；Described heating system uses
Heating mantles (5), described heating mantles (5) hangs on furnace bottom, makes discharge nozzle (6) be arranged on heating mantles (5)
In, it being provided with heating element heater in described heating mantles (5), temperature-controllable scope is 700-100 DEG C.
3. optical glass edge tear drop shaped device as claimed in claim 1, it is characterised in that: described limit
Frame (3) and plug (4) are arranged on bed die (1), and frame (3) is arranged around along bed die (1),
Described plug (4) is arranged on the inner side of frame (3), and a vertical of plug (4) and frame (3)
A side contacts and fix.
4. optical glass edge tear drop shaped device as claimed in claim 1, it is characterised in that: the described end
Being provided with Embedded 2 removable arm-ties (7) on mould (1), described 2 arm-ties (7) can pull out
Or insert, when pull-out, bed die (1) forms perforate；Upon insertion, in the upper formation of bed die (1)
Closed pore.
5. optical glass edge tear drop shaped device as claimed in claim 1, it is characterised in that: described torr
Frame (2) uses groined type double-decker.
6. large-aperture optical glass edge tear drop shaped device as claimed in claim 1, it is characterised in that:
The inclined-plane of described plug (4) is 50 °-70 ° with the angle of bed die (1) upper surface.
7. optical glass edge tear drop shaped device as claimed in claim 1, it is characterised in that: described stifled
Head (4) uses heatproof, high purity graphite material corrosion-resistant, non-staining to glass to make.
8. optical glass edge tear drop shaped device as claimed in claim 1, it is characterised in that: the described end
Mould (1) uses and is spliced by some capacity of heat transmission carborundum plates excellent, resistant to elevated temperatures, and reserved row
Material mouth, described bed die (1) and horizontal direction have the angle of 5 °-7 °.
9. the forming method of optical glass edge tear drop, it is characterised in that: the method comprises the following steps: 1)
Vitreous humour is flowed out by discharge nozzle (6), is adjusted the temperature of discharge nozzle (6) by heating system, makes discharging
The flow-control of pipe (6) is at 0.9-1.3L/min；2) mould after assembling is in the second preheating duration and degree of heating (10)
Preheating, is moved horizontally along track by small rail car (11) and mould moves to discharge nozzle (6)
Lower section；3) mould heats under heating mantles (5), pushes 2 arm-ties (7) on bed die (1),
Closed mould discharge gate, starts tear drop molding；4) first preheating duration and degree of heating (9) continue heating, vitreous humour from
Shop fixtures is progressively spread in plug (4) backward relative side convection current of rolling, and heating mantles (5) power is placed in bigger
Power, after shop fixtures completes, stops the heating of the first preheating duration and degree of heating (9), gradually reduces heating mantles (5) simultaneously
Power；5) in mould, vitreous humour liquid level reaches target liquid level aftershaping and terminates, little by moving track
Car (11), to track cooling sizing Accreditation Waiting Area, is blown from top to bottom by air blowing heat sink in the middle part of glass,
Blow and will the glass transfer in mould and mould to preheated annealing furnace be annealed after terminating.
10. the forming method of optical glass edge tear drop as claimed in claim 9, it is characterised in that: step
Rapid 4) described heating mantles (5) power is reduced to 15KW from 30KW；Step 5) described air-blowing quantity is 1-1.5NM3/ H,
Stand cooling 10-15 minute, stop blowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610273945.XA CN105948463B (en) | 2016-04-28 | 2016-04-28 | Optical glass edge tear drop molding machine and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610273945.XA CN105948463B (en) | 2016-04-28 | 2016-04-28 | Optical glass edge tear drop molding machine and forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105948463A true CN105948463A (en) | 2016-09-21 |
| CN105948463B CN105948463B (en) | 2019-02-26 |
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ID=56915988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610273945.XA Active CN105948463B (en) | 2016-04-28 | 2016-04-28 | Optical glass edge tear drop molding machine and forming method |
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| Country | Link |
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| CN (1) | CN105948463B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107500514A (en) * | 2017-07-04 | 2017-12-22 | 湖北新华光信息材料有限公司 | The small billot shaped device of optical glass |
| CN114409233A (en) * | 2022-02-10 | 2022-04-29 | 成都光明光电有限责任公司 | Glass block forming device and forming method thereof |
| CN114436512A (en) * | 2022-02-10 | 2022-05-06 | 成都光明光电有限责任公司 | Glass block forming device and forming method thereof |
| CN114646218A (en) * | 2022-05-19 | 2022-06-21 | 蒙娜丽莎集团股份有限公司 | Rock plate hot bending furnace and method for hot bending rock plate |
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| US5626641A (en) * | 1992-06-04 | 1997-05-06 | Matsushita Electric Industrial Co., Ltd. | Method of manufacturing a glass blank used for optical glass elements |
| CN104211282A (en) * | 2014-09-10 | 2014-12-17 | 湖北新华光信息材料有限公司 | Optical glass moulding die |
| CN104891787A (en) * | 2015-06-23 | 2015-09-09 | 成都光明光电股份有限公司 | Forming unit and method of optical glass |
| CN205088104U (en) * | 2015-11-02 | 2016-03-16 | 成都光明光电股份有限公司 | Optical glass billot forming device |
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| US5626641A (en) * | 1992-06-04 | 1997-05-06 | Matsushita Electric Industrial Co., Ltd. | Method of manufacturing a glass blank used for optical glass elements |
| CN104211282A (en) * | 2014-09-10 | 2014-12-17 | 湖北新华光信息材料有限公司 | Optical glass moulding die |
| CN104891787A (en) * | 2015-06-23 | 2015-09-09 | 成都光明光电股份有限公司 | Forming unit and method of optical glass |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107500514A (en) * | 2017-07-04 | 2017-12-22 | 湖北新华光信息材料有限公司 | The small billot shaped device of optical glass |
| CN114409233A (en) * | 2022-02-10 | 2022-04-29 | 成都光明光电有限责任公司 | Glass block forming device and forming method thereof |
| CN114436512A (en) * | 2022-02-10 | 2022-05-06 | 成都光明光电有限责任公司 | Glass block forming device and forming method thereof |
| CN114436512B (en) * | 2022-02-10 | 2023-06-23 | 成都光明光电有限责任公司 | Glass block forming device and forming method thereof |
| CN114409233B (en) * | 2022-02-10 | 2023-06-23 | 成都光明光电有限责任公司 | Glass block forming device and forming method thereof |
| CN114646218A (en) * | 2022-05-19 | 2022-06-21 | 蒙娜丽莎集团股份有限公司 | Rock plate hot bending furnace and method for hot bending rock plate |
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|---|---|
| CN105948463B (en) | 2019-02-26 |
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