CN105948463B - Optical glass edge tear drop molding machine and forming method - Google Patents
Optical glass edge tear drop molding machine and forming method Download PDFInfo
- Publication number
- CN105948463B CN105948463B CN201610273945.XA CN201610273945A CN105948463B CN 105948463 B CN105948463 B CN 105948463B CN 201610273945 A CN201610273945 A CN 201610273945A CN 105948463 B CN105948463 B CN 105948463B
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- optical glass
- heating
- bed die
- tear drop
- molding
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Classifications
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- 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 present invention provides a kind of optical glass edge tear drop molding machine, which can effectively control the striped and easy devitrification problem of optical glass.Optical glass edge tear drop molding machine, including bed die, bracket, small rail car, heating system and pre-heating system, the heating system controls molding space temperature, the pre-heating system heats mold bottom, and the bracket is arranged on small rail car, and the bed die is arranged on bracket, it further include frame and plug, the bed die, frame and plug constitute the molding die of optical glass.The present invention can meet technique requirement, flexible operation needed for large-aperture optical glass edge forms well and effectively improve the optical homogeneity and stress of heavy caliber glass convenient for handling and replacement.The present invention is suitable for heavy caliber crown class, flint class, and the molding of the optical glass of the types such as group of the lanthanides, fluorophosphate has good effect to the formation problems for the optical glass for solving the small viscosity such as group of the lanthanides, fluorophosphate, easy crystallization class.
Description
Technical field
The present invention relates to a kind of tear drop molding machine of large-aperture optical glass and its forming methods, more particularly to one kind
Heavy caliber, small viscosity, easy crystallization optical glass molding machine and its forming method.
Background technique
After optical glass is molten into qualified glass from powder, for the shape for making glass metal keep certain after hardening,
Gradually solidify its shape when must make glass using moulding process from liquid to Solid State Transformation, currently, large-aperture optical glass
Forming method mainly has following three kinds: 1) billot draws forming method: optical glass is in the molten state, continuously natural through mold
Form or clap optical glass strip material that is molded and being cut into certain size；2) casting forming method: optical glass is in molten condition
It directly pours into molding die down, is cooled to required structural glass；3) middle part tear drop forming method: glass metal is through material leakage pipe
It instills in the middle part of mold, glass metal diffuses to form the heavy caliber glass similar with mold shape around naturally.
Currently, small-bore optical glass mainly uses billot traction forming method production in general, this method is mainly applicable in
, viscosity biggish optical glass forming smaller in bore.A series of optical glass small for viscosity, crystallization is serious, material property is short,
Billot draws molding billot width and is difficult to be molded into 180mm or more, and thickness is usually less than 30mm, after exceeding the above specification, at
Profile bar line, crystallization can not be controlled effectively.Billot casting forming method is too simple, and striped, the bubble of casting process are difficult to control,
The optical homogeneity of glass is poor, is difficult to produce the large-aperture optical glass of high uniformity, high quality.In generally using now
Portion's tear drop forming method technology is relatively advanced, but this forming method has middle part and external temperature difference mistake always in technique
Big situation leads to molding striped and easy devitrification problem occur, and product can only remove defect by the way of dividing, selecting, and advise
Lattice size is limited, and yields is extremely low.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of optical glass edge tear drop molding machine, which can be with
The effectively striped and easy devitrification problem of control optical glass.
The present invention also provides a kind of forming method using above-mentioned optical glass edge tear drop molding machine.
The technical proposal for solving the technical problem of the invention is: optical glass edge tear drop molding machine, including bottom
Mould, bracket, small rail car, heating system and pre-heating system, the heating system control molding space temperature, the pre-heating system
Mold bottom is heated, the bracket is arranged on small rail car, and the bed die is arranged on bracket, further includes frame and stifled
Head, the bed die, frame and plug constitute the molding die of optical glass.
Further, the pre-heating system preheats duration and degree of heating and the second preheating duration and degree of heating using bottom first；The heating system
Using heating mantles, the heating mantles hang on furnace bottom, and discharge nozzle is arranged in heating mantles, heating is provided in the heating mantles
Element, temperature-controllable range are 700-100 DEG C.
Further, the frame and plug are arranged on bed die, and frame is arranged around bed die, the plug setting
In the inside of frame, and a side contacts and the fixation of a vertical plane and frame for plug.
Further, be provided with Embedded 2 removable pulling plates on the bed die, 2 pulling plates can pull out or
Insertion forms aperture when pulling out on bed die；Upon insertion, closed pore is formed on bed die.
Further, the bracket uses groined type double-layer structure.
Further, the angle ɑ of the inclined-plane of the plug and bed die upper surface is 50 ° -70 °.
Further, the plug using heatproof, it is corrosion-resistant, the non-staining high purity graphite material of glass is made.
Further, the bed die is using by several capacity of heat transmissions, excellent, carborundum plate resistant to high temperature is spliced,
And reserved discharge gate, the bed die have 5 ° -7 ° of angle with horizontal direction.
The forming method of optical glass edge tear drop, method includes the following steps: 1) glass metal is flowed out by discharge nozzle,
The temperature that discharge nozzle is adjusted by heating system, makes the flow control of discharge nozzle in 0.9-1.3L/min；2) molding after assembling
Mold is moved horizontally along track by small rail car and molding die is moved under discharge nozzle in the second preheating duration and degree of heating preheating
Side；3) molding die heats under heating mantles, 2 pulling plates being pushed on bed die, closed mould discharge gate, starts tear drop molding；
4) the first preheating duration and degree of heating continues to heat, and glass metal gradually spreads shop fixtures, heating mantles to opposite side convection current after plug rolling
Power is placed in relatively high power, after the completion of shop fixtures, stops the heating of the first preheating duration and degree of heating, while gradually reducing the power of heating mantles；
5) glass metal liquid level reaches to form after target liquid level and terminates in molding die, passes through moving track trolley to track cooling sizing etc.
It will be in molding die and molding die after air blowing by air blowing cooling device from top to bottom to air blowing in the middle part of glass to area
Glass transfer anneal into preheated annealing furnace.
Further, step 4) the heating mantles power is reduced to 15KW from 30KW；Step 5) the air-blowing quantity is 1-
1.5NM3/ H stands 10-15 minutes cooling, stopping blowing.
The beneficial effects of the present invention are: the present invention can meet technique needed for large-aperture optical glass edge forms well
It is required that flexible operation can control large-aperture optical glass long-term existence molding fringe technique convenient for handling and replacement well
The devitrification problem of easy crystallization glass can be effectively controlled in problem, improves the optical homogeneity and stress of heavy caliber glass.The present invention
Suitable for heavy caliber crown class, flint class, the molding of the optical glass of the types such as group of the lanthanides, fluorophosphate, to solution group of the lanthanides, fluorophosphoric acid
The formation problems of the optical glass of the small viscosity such as salt, easy crystallization class have good effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention.
Fig. 2 is the structural schematic diagram of the square dies of apparatus of the present invention.
Fig. 3 is the structural schematic diagram of the polygon mold of apparatus of the present invention.
Fig. 4 is the structural schematic diagram of the circular die of apparatus of the present invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, large-aperture optical glass tear drop molding machine of the invention includes bed die 1, frame 3, plug 4, moves
Dynamic pulling plate 7, bracket 2, small rail car 11, heating system, pre-heating system.Frame 3 and plug 4 are arranged on bed die 1, and frame 3
It is arranged along 1 surrounding of bed die, the inside of frame 3, and a side contacts of a vertical plane of plug 4 and frame 3 are arranged in plug 4,
And it adopts and is screwed.Since frame 3 only has side without bottom surface, bed die 1, frame 3 and plug 4 constitute optics glass
The molding die of glass, bed die 1 and frame 3 also can be made integral structure.Embedded 2 removable drawings are provided on bed die 1
7,2 pulling plates 7 of plate can be pulled out or are inserted into, and when pulling out, form aperture on bed die 1；Upon insertion, closed pore, such as Fig. 2 are formed
It is shown.Heating system uses heating mantles 5, and heating mantles 5 hang on furnace bottom, discharge nozzle 6 is arranged in heating mantles 5, in heating mantles 5
It is provided with heating element, temperature-controllable range is 700-100 DEG C, and heating mantles 5 are for guaranteeing molding space temperature.Pre-heating system is adopted
Duration and degree of heating 9 and the second preheating duration and degree of heating 10 are preheated with bottom first, mold bottom is heated, provides mold bottom certain temperature, is solved
Certainly diffusion problem when glass metal shop fixtures.Bed die 1 is arranged on carrier 2, and bracket 2 uses groined type double-layer structure, is located at middle part
Trave can be can be used as with discharge, the trave of other positions heating bed die 1 when flame heating gap, double-layer structure convenient for fork
Vehicle moves the glass on pallet into fork.Bracket 2 is arranged on small rail car 11, and small rail car 11 can do horizontal shifting along track
It is dynamic.First preheating duration and degree of heating 9 is to be fixed below molding machine in glass forming process to the device of bed die heating, the second preheating
Duration and degree of heating 10 is the preheating device before assembly mold molding, is arranged in track side.
In order to make the glass at middle part roll along two sides, the inclined-plane of plug 4 and the angle ɑ of 1 upper surface of bed die are 50 ° -70 °,
Since plug 4 is nearest apart from tear drop point, temperature is very high herein, and therefore, plug 4 selects heatproof, corrosion-resistant, non-staining to glass
High purity graphite material is made；Bed die 1 uses by several width the silicon carbide excellent, resistant to high temperature for the capacity of heat transmission of 100mm
Plate is spliced, and reserved discharge gate, and bed die 1 and horizontal direction have 5 ° -7 ° of angle, forms the structure that the front is high and the back is low (by blocking up
It is rear with 4 opposite direction side of plug before first 4 side is), so that glass metal dispersal direction is had a downward potential energy, is more advantageous to
The diffusion of glass metal；Frame 3 can be rectangular, polygon or round, thus constitute respectively with bed die 1 and plug 4 rectangular
Mold, as shown in Fig. 2, being also possible to polygon mold, as shown in figure 3, can also be circular die, as shown in Figure 4.
Frame 3 is typically chosen rectangle, is conducive to glass Convention diffusion in this way, is docked by two pieces of L-type cast iron plates, diagonally
Two o'clock is linked with bolt on line, is readily disassembled.
Large-aperture optical glass edge tear drop moulding technique of the invention, comprising the following steps: 1) glass metal passes through
Discharge nozzle 6 flows out, and to reduce glass metal diffusion and duration of pouring bring crystallization during glass metal shop fixtures, need to be by heating
The temperature of system adjustment discharge nozzle 6, makes the flow control of discharge nozzle (6) in 0.9-1.3L/min；2) molding die after assembling exists
Second preheating duration and degree of heating 10 preheats 5-10min, is moved horizontally by small rail car 11 along track and is moved to out molding die
6 lower section of expects pipe, makes discharge nozzle 6 and plug 4 at a distance of 30-50mm；3) molding die heats 5-10min under heating mantles 5, is pushed into bottom
2 pulling plates 7 on mould 1, closed mould discharge gate start tear drop molding；4) first preheating duration and degree of heating 9 continue to heat, glass metal from
Shop fixtures is gradually spread to opposite side convection current after the rolling of plug 4,5 power of heating mantles is placed in relatively high power 30KW, and shop fixtures is completed
Afterwards, stop the heating of the first preheating duration and degree of heating 9, while gradually reducing the power of heating mantles 5, in entire casting process, heating mantles function
Rate is reduced to 15KW from 30KW；5) glass metal liquid level reaches to form after target liquid level and terminates in molding die, passes through moving track
Trolley 11 is to track cooling sizing Accreditation Waiting Area, by air blowing cooling device from top to bottom to air blowing in the middle part of glass, air-blowing quantity 1-
1.5NM3/ H stands cooling 10-15 minute, stops drying, and by the heavy caliber glass transfer in molding die and molding die
It anneals into preheated annealing furnace.
In forming process, it can be put into next block shaping device in pre-heating system and preheated, to previous block of optical glass
Operation is repeated after the completion of molding.
Viscosity of glass metal requires to moor in 150-200 in forming method of the invention, and temperature of glass liquid is higher than on devitrification of glass
Limit temperature.The temperature of discharge nozzle 6 is adjusted, its stream is made by designing the pipe diameter size of discharge nozzle 6 for the diffusion for meeting glass metal
Amount reaches flow required for molding.
The forming temperature that the present invention uses casting process can be changed: it needs to adjust at any time depending on glass metal shop fixtures thickness in forming process
Whole 5 power of heating mantles, as shop fixtures thickness increases, 5 power of heating mantles will be gradually reduced, balanced whole process casting thermal field and heat
History, the presentation of 5 power of heating mantles are distributed from high to low.This is because shop fixtures process takes away amount of heat by mold, glass need to be promoted
The diffusivity of glass, therefore, shop fixtures process temperature want high, after the completion of shop fixtures, after glass metal diffusion is promoted, need to reduce heating mantles 5
Power, control diffusion is too fast, and guidance glass is orderly spread.
The present invention is using the quick middle part cooling provision in casting complete sizing waiting process: after the completion of glass casting, glass
The phenomenon that middle portion temperature is high, ambient temperature is low is presented in glass, and glass is non-conductor, need to radiate by external force, make temperature of glass liquid
It is rapidly separated crystallization area.The present invention by way of blowing to air blowing in the middle part of glass from top to bottom.
Apparatus and method of the present invention is suitable for heavy caliber crown class, flint class, the optics glass of the types such as group of the lanthanides, fluorophosphate
The molding of glass can solve the formation problems of the optical glass of the small viscosity such as group of the lanthanides, fluorophosphate, easy crystallization class.
Claims (9)
1. optical glass edge tear drop molding machine, including bed die (1), bracket (2), small rail car (11), heating system and pre-
Hot systems, the heating system control molding space temperature, and the pre-heating system heats mold bottom, and the bracket (2) sets
It sets on small rail car (11), the bed die (1) is arranged on bracket (2), it is characterised in that: further includes frame (3) and plug
(4), the bed die (1), frame (3) and plug (4) constitute the molding die of optical glass, and the frame (3) and plug (4) are set
It sets on bed die (1), and frame (3) is arranged around bed die (1), the plug (4) is arranged in the inside of frame (3), and stifled
One vertical plane of head (4) and a side contacts of frame (3) and fixation.
2. optical glass edge tear drop molding machine as described in claim 1, it is characterised in that: the pre-heating system uses bottom
Portion first preheats duration and degree of heating (9) and the second preheating duration and degree of heating (10)；The heating system uses heating mantles (5), and the heating mantles (5) are outstanding
It is hung on furnace bottom, makes discharge nozzle (6) setting in heating mantles (5), is provided with heating element, temperature-controllable in the heating mantles (5)
Range is 700-100 DEG C.
3. optical glass edge tear drop molding machine as described in claim 1, it is characterised in that: be arranged on the bed die (1)
There are Embedded 2 removable pulling plates (7), 2 pulling plates (7) can pull out or be inserted into, when pulling out, on bed die (1)
Form aperture；Upon insertion, closed pore is formed on bed die (1).
4. optical glass edge tear drop molding machine as described in claim 1, it is characterised in that: the bracket (2) uses well
Font double-layer structure.
5. optical glass edge tear drop molding machine as described in claim 1, it is characterised in that: the inclined-plane of the plug (4)
Angle ɑ with bed die (1) upper surface is 50 ° -70 °.
6. optical glass edge tear drop molding machine as described in claim 1, it is characterised in that: the plug (4) is using resistance to
It is warm, corrosion-resistant, the non-staining high purity graphite material of glass is made.
7. optical glass edge tear drop molding machine as described in claim 1, it is characterised in that: the bed die (1) using by
Several capacity of heat transmissions are excellent, carborundum plate resistant to high temperature is spliced, and reserved discharge gate, the bed die (1) and level
There is 5 ° -7 ° of angle in direction.
8. the forming method of optical glass edge tear drop, it is characterised in that: method includes the following steps: 1) glass metal is by going out
Expects pipe (6) outflow makes the flow control of discharge nozzle (6) in 0.9-1.3L/ by the temperature of heating system adjustment discharge nozzle (6)
min；2) molding die after assembling is preheated in the second preheating duration and degree of heating (10), does horizontal shifting along track by small rail car (11)
It is dynamic that molding die is moved to below discharge nozzle (6)；3) molding die heats under heating mantles (5), 2 in push-in bed die (1)
A pulling plate (7), closed mould discharge gate start tear drop molding；4) the first preheating duration and degree of heating (9) continues to heat, and glass metal is from plug
(4) shop fixtures is gradually spread to opposite side convection current after rolling, and heating mantles (5) power is placed in relatively high power, after the completion of shop fixtures, stops
The only heating of the first preheating duration and degree of heating (9), while gradually reducing the power of heating mantles (5)；5) glass metal liquid level reaches in molding die
Molding terminates after to target liquid level, by moving track trolley (11) to track cooling sizing Accreditation Waiting Area, passes through cooling dress of blowing
It sets and blows from top to bottom in the middle part of glass, by the glass transfer in molding die and molding die to preheated after air blowing
It anneals in annealing furnace.
9. the forming method of optical glass edge tear drop as claimed in claim 8, it is characterised in that: the step 4) heating mantles
(5) power is reduced to 15KW from 30KW；Step 5) the air-blowing quantity is 1-1.5NM3/ H stands cooling 10-15 minutes, stops blowing
Wind.
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 |
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| CN105948463A CN105948463A (en) | 2016-09-21 |
| CN105948463B true CN105948463B (en) | 2019-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107500514B (en) * | 2017-07-04 | 2020-06-12 | 湖北新华光信息材料有限公司 | Forming device for small optical glass strip |
| 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 |
| 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 |
| CN114646218B (en) * | 2022-05-19 | 2022-10-25 | 蒙娜丽莎集团股份有限公司 | Rock plate hot bending furnace and method for hot bending treatment of 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 |
-
2016
- 2016-04-28 CN CN201610273945.XA patent/CN105948463B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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