CN111620550A - Low-melting-point optical glass forming device - Google Patents
Low-melting-point optical glass forming device Download PDFInfo
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- CN111620550A CN111620550A CN202010471650.XA CN202010471650A CN111620550A CN 111620550 A CN111620550 A CN 111620550A CN 202010471650 A CN202010471650 A CN 202010471650A CN 111620550 A CN111620550 A CN 111620550A
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- 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
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- 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
- C03B11/12—Cooling, heating, or insulating the plunger, the mould, or the glass-pressing machine; cooling or heating of the glass in the mould
- C03B11/125—Cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Chemical & Material Sciences (AREA)
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Abstract
The invention provides a low-melting-point optical glass forming device, and belongs to the technical field of optical glass forming. The method mainly solves the problem of forming stripes on the surface of the low-melting-point optical glass strip. The main scheme is as follows: the mold rear baffle is additionally provided with the striker plate and the striker plate fixing frame, a leakage groove with a triangular cross section is formed between the striker plate and the mold rear baffle, and the molten glass flowing out of the material pipe is changed into a strip shape from a column shape under the action of the leakage groove, so that the surface area of the molten glass is increased, the cooling efficiency of the mold on the molten glass is favorably improved, the temperature difference between the center and the edge of the molten glass is reduced, the difference of viscosity is reduced, and convection stripes caused by large difference of the center and the edge viscosity during the molding of the columnar molten glass can be prevented; simultaneously, the arc-shaped structure of the working surface of the rear baffle is formed, so that stub bar glass liquid directly flows onto the rear baffle to be cooled, the stroke and the detention time of the glass liquid on a mold are prolonged, the glass liquid is cooled to a setting area range on the rear baffle, and the occurrence of convection stripes caused by high forming temperature and low viscosity is prevented.
Description
Technical Field
The invention belongs to the technical field of optical glass forming, and relates to a forming device for low-melting-point optical glass strips.
Background
With the development of digital cameras, digital video cameras, mobile phones capable of taking pictures and the like towards better imaging quality and higher definition, the use of aspheric lenses is more and more extensive, and therefore glass with high refractive index, low dispersion and high transmittance is more and more favored by the market. Meanwhile, in order to reduce the processing difficulty and the production cost, the precision press molding technology becomes the first choice for manufacturing the optical lens by the optical glass, however, the obtained optical glass has to have a lower transformation temperature in order to be suitable for precision press molding, which also puts high requirements on optical glass developers.
Most of the optical glass with low melting point contains rare earth elements and has longer performance than general optical glass material. If the use temperature of the nozzle of the molding material is too low, the nozzle crystallization scratch stripes are easy to appear, in order to ensure that the glass liquid does not crystallize in the nozzle of the material nozzle, the leakage injection temperature of the glass liquid must be increased, the temperature of the glass liquid is high, the viscosity is small during molding, the molding is difficult, and the molding stripes are easy to generate. In order to reduce the forming temperature and increase the forming viscosity, strong cooling is needed during low-melting point forming, and when glass is leaked, the glass is columnar due to the existence of surface tension, and only part of glass liquid is cooled from the periphery, so that the difference between the central viscosity and the outer viscosity is large, convection stripes are generated, and some volatile components such as fluorine are easy to generate volatilization stripes.
Patent document CN 100999376B provides a molding apparatus and a molding method for fluorophosphate optical glass, as shown in fig. 1, the apparatus is composed of a bottom mold, a side mold and a stopper, a cooling cover plate is provided on a molding mold, a vent hole is provided on the cover plate, and inert gas blows to the surface of molten glass through the vent hole on the cooling cover plate, so that the molten glass is molded after being cooled as soon as possible, and the molten glass is prevented from being volatilized to cause streaks.
Patent document CN107827340A also discloses an apparatus for molding an optical glass, as shown in fig. 2, for solving the problem of striae in the conventional molding of a fluorophosphate optical glass. The method mainly comprises the steps of rapidly cooling glass liquid in a mould, solidifying and shaping, and preventing the generation of volatile stripes and fluoride pollution.
Both of the above two patents provide the means of reducing the surface temperature of the glass sheet to prevent the formation of volatile matter streaks, but have a limited effect on reducing the temperature and increasing the viscosity of the glass liquid in the middle of the sheet, and the surface cooling means has a poorer effect on increasing the viscosity of the glass liquid in the middle of the sheet as the thickness of the sheet increases, and has a very small effect on solving the convection streaks of the ordinary glass caused by the difference between the internal and external viscosities when the specification and thickness of the sheet exceed 10 mm. Particularly, because the low-melting glass has long material property, the plate is difficult to shape in the die in the forming process, convection stripes are easy to generate, and are aggravated along with the increase of the specification thickness, the forming equipment and the forming method in the two patents are difficult to solve the problem that the middle convection stripes of the low-melting glass bring difficulty to production, and therefore, the development of a die and a forming method is urgently needed to solve the problems.
Disclosure of Invention
The invention aims to solve the problem of stripes in the process of forming a low-melting-point glass plate and designs a low-melting-point optical glass forming device.
The invention relates to a technical solution of a low-melting-point optical glass forming device, which comprises the following steps: the device includes mould bottom plate, mould curb plate and mould backplate, and the U-shaped groove is constituteed with mould side shield and mould bottom plate to the mould backplate, and the mould backplate is arc, its characterized in that: the device also comprises a rear baffle cover plate, a material baffle plate and a material baffle fixing frame; the two ends of the material baffle are connected with the mold rear baffle through a material baffle fixing frame, the mold rear baffle, the material baffle and the material baffle fixing frame are installed to form a leakage groove with a triangular cross section, the leakage groove is provided with a function that the upper end of the leakage groove can collect glass liquid injected by a material leakage pipe, the lower end of the leakage groove can leak and inject the glass liquid, the leakage groove and the total amount of the leaked and injected glass liquid are received in a proper temperature and viscosity range to reach balance, a transfer function is achieved, the viscosity and the uniformity of the glass liquid are adjusted through the transfer function, meanwhile, the flowing shape of the glass liquid is changed from a columnar shape to a strip shape, the surface area of the glass liquid is increased; the rear baffle cover plate is arranged at the top of the triangular leakage groove and is provided with a glass leakage pipe through hole.
According to the technical scheme of the low-melting-point optical glass plate forming device, an angle adjusting mechanism is arranged between the material baffle and the material baffle fixing frame.
The technical scheme of the low-melting-point optical glass plate forming device is that the angle adjusting mechanism comprises a gear disc, a bolt and a worm, wherein the gear disc and the material baffle are in fastening connection through the bolt and are in meshed connection with the worm, and the angle of the material baffle is adjusted by rotating the worm.
According to the technical scheme of the low-melting-point optical glass plate forming device, the working surface of the mold back baffle is arc-shaped in the glass liquid flow channel direction, and uniform strip-shaped leaks are formed between the baffle and the working surface of the mold back baffle; the triangular leakage groove and the rear baffle cover plate form a closed cavity. The design of backplate working face is the arc at glass traffic direction, makes on glass liquid can the direct flow backplate, and the working face arc also prolongs glass liquid and gets into the regional route of shaping on the backplate simultaneously, has strengthened glass liquid cooling effect.
According to the technical scheme of the forming device for the low-melting-point optical glass plate, the rear baffle cover plate is provided with the rear baffle cover plate thermocouple and is used for detecting the space temperature of the cavity of the triangular leakage groove.
The technical scheme of the optical glass forming device is that the rear baffle of the mold is provided with a rear baffle cooling air pipe and a rear baffle temperature monitoring thermocouple.
In the technical scheme of the low-melting-point optical glass forming device, a die space cover plate is arranged above the U-shaped groove, and a space cover plate vent pipe and a space temperature thermocouple are arranged on the die space cover plate and used for cooling the surface of glass to prevent volatilization.
According to the technical scheme of the low-melting-point optical glass forming device, the lower part of the rear baffle of the mold is embedded into the bottom plate of the mold in a submerged mode, the working surface of the rear baffle of the mold and the surface of the bottom plate of the mold are matched with the contact part of molten glass to form smooth transition, and the rear baffle is prevented from being damaged easily in the using process due to the fact that the rear baffle is in an arc shape.
In the technical scheme of the low-melting-point optical glass forming device, the die bottom plate, the die rear baffle plate and the material baffle plate are all made of aluminum bronze, die steel materials or heat-resistant stainless steel materials.
The inner surface of the mould space cover plate in the technical scheme of the low-melting-point optical glass forming device is designed into foam copper. The mold space uses a cover plate added with porous foam copper, so that cooling gas can be uniformly distributed on the surface of the glass.
The invention has the beneficial effects that:
the forming die backplate working face is equipped with striker plate and striker plate mount, striker plate and striker plate mount and die backplate working face form the wide-end-down narrow triangle-shaped and have the small form bushing of receiving and releasing glass liquid function, glass liquid pours into the below from the top of small form bushing and flows out, the triangle small form bushing effect of forming through striker plate and striker plate mount and die backplate working face, can change stub bar inflow glass liquid into banding by the column, the surface area of glass liquid increases by a wide margin, be favorable to improving the cooling efficiency of mould to glass liquid, reducible glass liquid center and surface temperature and viscosity difference simultaneously, can prevent the convection current stripe that causes greatly because of center and border viscosity difference when column glass liquid shaping.
The working surface of the rear baffle of the forming die is a cambered surface different from the conventional plane, and the stub bar can be moved to the position set by the rear baffle of the die, so that the molten glass flowing out of the stub bar directly falls on the rear baffle for cooling; simultaneously, the working face is an arc-shaped mold rear baffle in the glass flowing direction, so that the path and the detention time of the glass liquid from the material pipe to the molding area are prolonged, the flowing speed of the glass liquid is slowed down, the cooling efficiency of the glass liquid is enhanced, the mold rear baffle is made of materials such as aluminum bronze, the cooling effect of the glass liquid is improved, the glass liquid is cooled to the molding area range on the mold rear baffle, and the occurrence of convection stripes caused by the high viscosity of the molding temperature is prevented.
And 3, the working surface of the rear baffle plate of the forming die is a cambered surface, so that the included angle between the working surface of the rear baffle plate of the forming die and the bottom plate is as small as 5-30 degrees, the bottom plate of the forming die is a plane under the general condition, and the problems that the rear baffle plate opening is easy to deform and stick to the die and the like in the use process are caused in order to prevent the junction of the cambered surface rear baffle plate and the working surface of the bottom plate of the forming die (hereinafter referred to as the rear baffle. The design forming die backplate dives into the mould bottom plate down, makes the thickening of backplate mouth become blunt shape and has avoided the easy deformation of backplate point shape, glue the mould scheduling problem.
4. The cover plate of the mold space above the mold is a device for introducing cooling gas to cool the surface of the glass, and the inside of the cover plate is designed into foam copper which can enable the cooling gas to uniformly cool the surface of the glass liquid.
Drawings
FIG. 1 is a schematic view of a low-melting-point optical glass forming apparatus.
FIG. 2 is a schematic side view of a conventional low melting point optical glass forming apparatus.
FIG. 3 is a schematic structural diagram of the low melting point optical glass forming apparatus of the present invention.
FIG. 4 is a schematic view of the adjustment of the striker plate of the low melting point optical glass forming device of the present invention.
FIG. 5 is a schematic view of the rear baffle plate of the low melting point optical glass forming apparatus of the present invention submerged in the base plate.
FIG. 6 is a schematic view of an angle adjustment mechanism of a striker plate of the low melting point optical glass forming device of the present invention.
Description of the symbols
1 mould backplate 2 mould bottom plate 3 glass drain pipe 4 glass stub bar 5 fashioned glass 6 backplate apron 7 mould side shield 8 striker plate 9 glass liquid
10 mould space cover plate
11 rear baffle cooling air pipe
12 rear baffle temperature monitoring thermocouple
13 striker plate mount
14 space cover plate vent pipe
15 backplate apron thermocouple
16 space temperature thermocouple
17 Gear disc
18 bolt
19 worm.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 3-5. The low-melting-point optical glass forming device comprises a mold back plate 1, a mold bottom plate 2, a glass material leakage pipe 3, a mold space cover plate 10, a mold side baffle plate 7, a material baffle plate 8, a back plate cover plate 6, a back plate temperature monitoring thermocouple 12 and a material baffle plate fixing frame 13. The mold rear baffle 1, the mold side baffle 7 and the mold bottom plate 2 form a U-shaped groove, and the working surface of the mold rear baffle 1 contacting the molten glass is a cambered surface. The working face of the mold rear baffle is designed to be arc-shaped in the glass running direction, so that the glass liquid can directly flow to the mold rear baffle, meanwhile, the arc-shaped working face also prolongs the path of the glass liquid entering the forming area from the mold rear baffle, and the cooling effect of the glass liquid is enhanced. The both ends of striker plate 8 are passed through striker plate mount 13 and are connected with mould backplate 1, striker plate 8 forms the lower extreme with mould backplate 1's arc working face and striker plate mount 13 and has even clearance triangle-shaped small opening, backplate apron 6 sets up the upper end at the triangle-shaped small opening, and be equipped with glass bushing through-hole, be equipped with the backplate apron thermocouple 15 that is used for surveying triangle-shaped small opening cavity space temperature on the backplate apron 6, triangle-shaped small opening and backplate apron 6 form the closed cavity, the small opening is received at suitable temperature and viscosity range and is reached the equilibrium with the total volume of leaking notes glass liquid, play the transfer effect. The viscosity and the uniformity of the glass liquid through the transfer function are adjusted, meanwhile, the flowing shape of the glass liquid is changed from a columnar shape to a strip shape, the surface area of the glass liquid is increased, the viscosity is increased, the uniformity is improved, and the cooling efficiency is improved. The mold back baffle 1 is provided with a back baffle cooling air pipe 11 and a back baffle temperature monitoring thermocouple 12. The die bottom plate 2, the die back baffle 1 and the material baffle 8 are made of aluminum bronze or die steel materials. Mould backplate 1 dives embedding mould bottom plate 2, and mould backplate 1 and mould bottom plate 2 cooperate into smooth transition with the working face of glass liquid contact, prevent to cause the pointed end to send easy damage in the use after the mould backplate becomes the arc. An angle adjusting mechanism is arranged between the striker plate 8 and the striker plate fixing frame 13, and the angle adjusting mechanism is shown in figure 6. Including toothed disc 17, bolt 18, worm 19, wherein toothed disc 17 and striker plate 8 form fastening connection through bolt 18, and rotate with 19 looks meshes of worm, adjust through rotatory worm 19, reach the angle of accurate striker plate 8. A mold space cover plate 10 is arranged above the U-shaped groove, a space cover plate vent pipe 14 and a space temperature thermocouple 16 are arranged on the mold space cover plate 10, and the inner surface of the mold space cover plate 10 is designed into foam copper. The cover plate added with the porous foam copper is used in the mold space, so that the surface of the molten glass can be uniformly cooled by cooling gas. The glass material leaking pipe 3 penetrates through a through hole of the glass material leaking pipe on the rear baffle cover plate 6, glass liquid 9 is injected, the glass liquid enters a U-shaped groove of the forming die along the working surface of the die rear baffle 1 through a gap at the lower end, and the glass material head 4 flowing out of the glass material leaking pipe 3 is converted into a belt shape from a column shape through the effect that the striker plate 8, the striker plate fixing frame 13 and the die rear baffle 1 form a leakage groove. The liquid level of the molten glass 9 in the leakage groove and the flowing speed can be realized by adjusting the clearance between the striker plate 8 and the working surface of the die back baffle 1 through rotating the striker plate 8. The viscosity of the molten glass 9 in the trough can be controlled by cooling the mold backplate 1 to accommodate the different viscosity, mass and flow characteristics of the glass.
D-La mark is a kind of optical glass containing fluorine component, its material property is longer than general glass, its crystallization temperature is 1140 deg.C, forming temperature is about 510 deg.C, and its discharge quantity can be up to above 800 Kg/day, and it is difficult to form by using general mould and forming method, and its convection stripe is serious. The following describes the process steps of the forming device of the present invention, taking the example of the production of D-La with a width of 150+5 and a thickness of 15+2mm from the glass strip stock.
1. The molding device is installed as shown in fig. 3, wherein the mold backplate 1 with the arc-shaped working surface is submerged into the mold base plate 2 as shown in fig. 4, the length of the mold backplate 1 is designed to be 150mm, the included angle between the arc surface and the mold base plate is 5-30 degrees, the mold base plate 2 is matched with the shape processing of the mold backplate 1, the mold backplate 1 is submerged onto the mold base plate 2 as shown in fig. 4, and at this time, the arc surface is tangent to the plane of the base plate to form smooth connection. In order to prevent the interference of the gap between the mold back baffle 1 and the mold bottom plate 2 on the flowing of the glass liquid, after the mold back baffle 1 and the mold bottom plate 2 are installed, a mold release agent is sprayed on the working surfaces of the mold back baffle 1 and the mold bottom plate 2 to fill the working surfaces into smooth surfaces. And installing the die side baffle 7 and the material baffle fixing frame 13 according to the figure 3 and the figure, so that the die bottom plate 2, the die side plate 7 and the die back baffle 1 form a U-shaped groove, and the distance between the two die side baffles 7 reaches 152-154 mm. And then a gear disc 17, a bolt 18 and a worm 19 are installed according to the figure 6, so that the gear disc 17 is meshed with the worm 19, the bolt 18 is firstly stored in a loose state (the gear disc and the striker plate can rotate relatively), and the die is fixed on a die car after the die is installed.
2. After the glass liquid of the feeding pipe mouth flows out, the temperature of the glass liquid flowing out is controlled to be 1160-1170 ℃ within the range of crystallization temperature plus 20-30 ℃. Firstly, introducing molten glass into a mold according to a conventional method, and after the head is successfully guided, adjusting a mold vehicle and a glass material leaking pipe 3 to enable a glass stub bar 4 to be arranged at a set cambered surface position of a mold rear baffle 1; install 8 striker plates to the striker plate mount 13 of having sprayed the release agent, guarantee during the installation that the striker plate 8 is a little big with 1 clearance of mould backplate, let glass liquid not obstructed directly through by striker plate 8, utilize the heat of glass liquid or even other heat sources to heat striker plate 8, make the temperature of striker plate 8 reach softening temperature Ts +50 ~ 80 ℃. And then gradually reducing the gap between the material baffle plate 8 and the mold back baffle plate 1, gradually raising the liquid level of the glass liquid 9 in the triangular leakage groove and leaking from the lower end, and roughly adjusting the gap between the material baffle plate 8 and the mold back baffle plate 1 by directly rotating the material baffle plate 8, wherein when the gap is close to a target, the fastening bolt 18 (the gear disc and the material baffle plate can not rotate relatively) is changed into an angle adjusting mechanism, and the gap is precisely adjusted by rotating the worm 19. When the baffle plate 8 and the mold back baffle 1 are fixedly adjusted, the gap width is ensured to be consistent, so that the gap between the baffle plate 8 and the mold back baffle 1 is smaller under the condition that the leaked molten glass is in a strip shape with uniform thickness and the material flow is constant, the strip-shaped molten glass is thinner, and conversely, the strip-shaped molten glass is thicker. The size of the gap between the striker plate 8 and the mold back baffle 1 is determined according to the flow and the cooling effect of the mold back baffle 1, and meanwhile, the molding condition is considered. When the glass liquid is too low during molding, the molding cold texture condition is not good, and the stability of the stripes is influenced by high temperature.
3. After the molding is normally stable, the back baffle cover plate 6 and the back baffle cover plate thermocouple 15 are installed, and the back baffle cover plate 6 can keep the space temperature field of the sink formed by the striker plate 8 and the mold back baffle 1 stable, so that the working state of the sink is stable. Meanwhile, for the D-La mark glass containing easy fluorine volatile components, the volatilization of the glass components can be reduced. Because of the glass liquid temperature is much higher than the space temperature in the small opening, when the glass liquid is close to or contacts the backplate apron thermocouple 15, the backplate apron thermocouple 15 temperature can sharply rise, and the glass liquid 9 liquid level height in the small opening can be detected to usable backplate apron thermocouple 15 temperature change according to this, prevents that the glass liquid 9 liquid level is too high in the small opening and even overflows and influence the stability of small opening work.
4. After the drainage process is finished, the space cover plate 10 of the mold is installed on the mold, and the space cover plate 10 is provided with a device capable of cooling by using gas and a space temperature thermocouple 16 capable of testing the space temperature, so that the temperature field of the space is generally ensured to be stabilized in the range of Tg-30 ℃ to-60 ℃, and the volatilization of volatile component fluorine on the surface of glass liquid during molding can be prevented.
5. When the glass is molded, the cold veins at the bottom of the glass become thick, so that the gap between the material baffle plate 8 and the mold back baffle plate 1 can be properly increased, and the thickness of the strip-shaped glass liquid is reduced; on the contrary, when the cold lines at the bottom of the glass become thin during molding, the gap between the material baffle plate 8 and the mold back baffle plate 1 can be properly reduced, and the thickness of the strip-shaped glass liquid is increased. The consistency of the gap width is always kept when the material baffle 8 and the mold back baffle 1 are adjusted, and the effect that the ribbon glass liquid is formed and cannot be achieved due to the influence of bias flow is prevented.
6. The temperature change of the mold back baffle 1 can be monitored by the back baffle temperature monitoring thermocouple 12, the temperature of the mold back baffle 1 can be adjusted by the air volume of the back baffle cooling air pipe 11, the viscosity of the molten glass entering a molding area is further adjusted by monitoring and controlling the temperature of the mold back baffle 1, and the stripes are caused by the inconsistent viscosity of the molten glass in the accurate control process.
Claims (10)
1. The utility model provides a low melting point optical glass forming device, the device includes mould bottom plate (2), mould backplate (1) and mould side shield (7), and U-shaped groove is constituteed with mould side shield (7) and mould bottom plate (2) to mould backplate (1), and mould backplate (1) are the arc, its characterized in that: the device also comprises a rear baffle cover plate (6), a material baffle plate (8) and a material baffle plate fixing frame (13); two ends of the material baffle plate (8) are connected with the mold rear baffle plate (1) through a material baffle plate fixing frame (13), and the mold rear baffle plate (1), the material baffle plate (8) and the material baffle plate fixing frame (13) are installed into a triangular leakage groove; the rear baffle cover plate (6) is arranged at the top of the triangular leakage groove and is provided with a glass leakage pipe through hole.
2. A low melting point optical glass forming apparatus as defined in claim 1, wherein: the striker plate (8) is provided with an angle adjusting mechanism.
3. A low melting point optical glass forming apparatus as defined in claim 2, wherein: the angle adjusting mechanism comprises a gear disc (17), a bolt (18) and a worm (19), wherein the gear disc (17) and the striker plate (8) form fastening connection through the bolt (18), the gear disc is meshed with the worm (19) and connected with the worm (19), and the worm (19) is rotated to adjust the angle of the striker plate (8).
4. A low melting point optical glass forming apparatus as defined in claim 1, 2 or 3, wherein: the working surface of the mold rear baffle (1) is arc-shaped in the glass liquid flow channel direction, and uniform strip-shaped leaks are formed between the material baffle (8) and the working surface of the mold rear baffle (1); the triangular leakage groove and the rear baffle cover plate (6) form a closed cavity.
5. A low melting point optical glass forming apparatus as defined in claim 4, wherein: and a rear baffle cover plate thermocouple (15) is arranged on the rear baffle cover plate (6).
6. A low melting point optical glass forming apparatus as defined in claim 5, wherein: the mold rear baffle (1) is provided with a rear baffle cooling air pipe (11) and a rear baffle temperature monitoring thermocouple (12).
7. A low melting point optical glass forming apparatus according to claim 5 or 6, wherein: a die space cover plate (10) is arranged above the U-shaped groove, and a space cover plate vent pipe (14) and a space temperature thermocouple (16) are arranged on the die space cover plate (10).
8. A low melting point optical glass forming apparatus according to claim 5 or 6, wherein: the mold rear baffle (1) is embedded into the mold bottom plate (2) in a submerged mode, and the mold rear baffle (1) and the mold bottom plate (2) are matched with a working surface in contact with molten glass to form smooth transition.
9. A low melting point optical glass forming apparatus according to claim 5 or 6, wherein: the die bottom plate (2), the die rear baffle (1) and the material baffle (8) are made of aluminum bronze, die steel materials or heat-resistant stainless steel materials.
10. A low melting point optical glass forming apparatus as defined in claim 7, wherein: the inner surface of the mould space cover plate (10) is designed into foam copper.
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| CN202010471650.XA CN111620550B (en) | 2020-05-29 | 2020-05-29 | Low-melting-point optical glass forming device |
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| CN202010471650.XA CN111620550B (en) | 2020-05-29 | 2020-05-29 | Low-melting-point optical glass forming device |
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| CN111620550B CN111620550B (en) | 2023-01-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277713A (en) * | 2021-06-25 | 2021-08-20 | 成都光明光电有限责任公司 | Glass forming device and forming method of large-caliber neodymium-doped phosphate laser glass |
| 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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| CN111620550B (en) | 2023-01-24 |
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