CN113387547A - Casting molding process of high-refractive-index optical glass - Google Patents
Casting molding process of high-refractive-index optical glass Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
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Abstract
The invention discloses a casting molding process of high-refractive-index optical glass, which belongs to the field of optical glass preparation, and effectively reduces the bubble rate in glass liquid by creatively adding a bubble driving device in the existing casting process, wherein the bubble driving device blows large bubbles into the glass liquid, takes away or eliminates small bubbles in the floating process of the large bubbles to effectively reduce the bubble rate, meanwhile, magnetic fields which appear and disappear simultaneously are applied to the two sides of the mould, the appearance of the magnetic fields enables the elastic air outlet pipe on the foam driver to be distorted and deformed, the disappearance of the magnetic fields enables the elastic air outlet pipe to be straightened, thereby the intermittent appearance and disappearance of the magnetic field can lead the elastic air outlet pipe to be switched back and forth between twisting and straightening, lead the elastic air outlet pipe to disturb the glass metal so as to drive the bubbles to float upwards, thereby further reducing the bubble rate, saving the manpower labor compared with the prior art, and effectively reducing the bubble rate of the optical glass.
Description
Technical Field
The invention relates to the field of optical glass preparation, in particular to a casting molding process of high-refractive-index optical glass.
Background
Optical glasses are glasses that change the direction of light propagation and change the relative spectral distribution of ultraviolet, visible, or infrared light. Optical glass in the narrow sense means colorless optical glass; the optical glass in a broad sense also includes colored optical glass, laser glass, quartz optical glass, radiation-resistant glass, ultraviolet infrared optical glass, fiber optical glass, acousto-optic glass, magneto-optic glass and photochromic glass. The optical glass can be used for manufacturing lenses, prisms, reflectors, windows and the like in optical instruments. Components made of optical glass are critical elements in optical instruments.
The raw materials for producing the optical glass are some oxides, hydroxides, nitrates and carbonates, and phosphates or fluorides are introduced according to the requirements of the formulation. In order to ensure the transparency of the glass, the content of colouring impurities, such as iron, chromium, copper, manganese, cobalt, nickel, etc., must be strictly controlled. The materials are required to be accurately weighed and uniformly mixed during the material preparation. The main production processes are smelting, forming, annealing and inspection. The molding method mainly comprises a classical crucible breaking method, a rolling method and a casting method, wherein the casting method is a method frequently adopted for molding optical glass.
In the process of molding by using a pouring method, because the flow rate of glass pouring is difficult to control, and in addition, the shaking of glass liquid flow is unstable during blanking, the glass is folded after being poured, so that bubbles are generated inside the glass.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a casting molding process of high-refractive-index optical glass, which effectively reduces the bubble rate in glass liquid by creatively adding a bubble driving device in the prior casting process, the bubble driving device blows large bubbles into the glass liquid, takes away or eliminates small bubbles in the floating process of the large bubbles to effectively reduce the bubble rate, and simultaneously applies magnetic fields which appear and disappear at the same time on two sides of a mold, the elastic air outlet pipe on the bubble driving device is distorted and deformed by the appearance of the magnetic fields, the elastic air outlet pipe is straightened by the disappearance of the magnetic fields, so that the elastic air outlet pipe is switched back and forth between distortion and straightening by the intermittent appearance and disappearance of the magnetic fields, the elastic air outlet pipe disturbs the glass liquid to drive the bubbles to float, thereby further reducing the bubble rate, and compared with the prior art, the manual labor is saved, and effectively reduces the bubble rate of the optical glass.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A casting molding process of high-refractive-index optical glass comprises the following casting steps:
s1, preparing a casting mold, coating a release agent in the mold, placing the foam driver into the mold, communicating the upper end of the foam driver with an air blowing device, and starting the air blowing device;
s2, injecting the smelted molten glass into a mold, blowing large bubbles into the molten glass by a bubble driver, and taking or eliminating small bubbles by the large bubbles in the floating process so as to reduce the bubble rate in the molten glass;
s3, simultaneously applying magnetic fields with the same strength and synchronously and intermittently appearing and disappearing on two sides of the mold, and disturbing the inside of the molten glass while blowing air by the bubble driver under the action of the magnetic fields to enable bubbles to float upwards to help to remove the bubbles and further reduce the bubble rate;
and S4, after the magnetic field is applied, slowly pulling the bubble driving device upwards to enable the bubble driving device to upwards discharge bubbles from the bottom of the molten glass until the bubble driving device is completely pulled out of the molten glass, and demoulding after the molten glass is cooled.
Further, the bubble ware of driving in the S1 step includes the ceramic drum pipe, set up many circles around the bottom of ceramic drum pipe and blow the piece, and all through a plurality of pottery breather pipes intercommunication between every circle of piece and the ceramic drum pipe of blowing, every circle blow the piece and all include a plurality of bubbles that are the circumference and distribute and get rid of the ball, and two adjacent bubbles get rid of and the intercommunication has ceramic communicating pipe between the ball, and after the air-blowing device bloated gas in the ceramic drum pipe, gas entered into every circle of bubble in proper order through ceramic breather pipe and got rid of the ball from inside to outside, and the bubble on every circle gets rid of and goes into again through ceramic communicating pipe between the ball to guarantee that gas can enter into every bubble and get rid of in the ball.
Further, the upper portion of bubble exclusion ball is seted up the chamber of ventilating that communicates with pottery communicating pipe or pottery breather pipe, and the lower part that the ball was excluded to the bubble is solid construction, the upper end intercommunication elasticity outlet duct of bubble exclusion ball, and the outside parcel of elasticity outlet duct has high temperature resistant protective layer, the upper end intercommunication of elasticity outlet duct has the gas bubble spare, and during the gas chamber of ventilating that the ball was excluded by the bubble entered into elasticity outlet duct, and then the big bubble of gas is blown in to the glass liquid by the gas bubble spare.
Further, elasticity outlet duct includes the main part section, the upper and lower two parts of main part section are inlayed respectively and are had last magnetism section and lower magnetism section, and elasticity outlet duct keeps vertical state under natural state, and after applying magnetic field, go up magnetism section and lower magnetism section and move to the left and right sides respectively under the attraction in magnetic field for elasticity outlet duct becomes the distortion state by vertical state, and after magnetic field disappearance, elasticity outlet duct resumes vertical state under self elasticity effect, like this in the appearance of magnetic field intermittent type nature and disappearance state down the repeated transform of elasticity outlet duct, thereby carry out the disturbance to the glass liquid, in order to order about the bubble come-up.
Further, go up the magnetism of magnetism section and lower magnetism section opposite, go up magnetism section and the left magnetic field of mould and attract mutually, down magnetism section and the right side of mould attract mutually, when magnetic field appeared, go up the magnetism section and be pulled to the left by the left magnetic field, lower magnetism section is pulled to the right by the magnetic field on right side to let the elasticity outlet duct become the distortion state.
Furthermore, the high temperature resistant protective layer adopts the sealed gluey material of high temperature resistant, and the sealed gluey protection elasticity outlet duct of high temperature resistant is melted by the high temperature of glass liquid for elasticity outlet duct can normally work, and the thickness of high temperature resistant protective layer is greater than the thickness of elasticity outlet duct, is in order to reduce the heat of transmitting to the elasticity outlet duct through the high temperature resistant protective layer.
Furthermore, the upper end of the bubble blowing piece is of a concave wedge-shaped surface structure, so that resistance to the bubble driving device when the bubble blowing device is pulled upwards is reduced, a T-shaped air outlet cavity communicated with the elastic air outlet pipe is formed in the bubble blowing piece, and therefore the air outlet of the bubble blowing piece is arranged on two sides instead of the upper portion, and glass liquid can be effectively prevented from being filled into the bubble blowing piece in the upward moving process and being blocked to blow.
Further, the inside fixedly connected with drainage cover in chamber of ventilating, and drainage cover and pottery communicating pipe and elasticity outlet duct intercommunication simultaneously, the drainage cover is in order to dwindle the inside gas storage space in chamber of ventilating to let gas can be direct and quick enter into the elasticity outlet duct, avoid producing the air current disturbance and influence the effect of blowing bubble.
Furthermore, the drainage cover is of a horn-shaped structure with a wide bottom and a narrow top, and the drainage cover is made of high-temperature-resistant heat conduction materials.
Further, the upper portion lateral wall that the ball was got rid of to the bubble is inlayed and is had a plurality of high temperature resistant heat absorption panels, and drainage cover and bubble get rid of the heat-conducting piece that fixedly connected with and high temperature resistant heat absorption panel are connected in the space between the ball lateral wall, the heat-conducting piece includes the heat conduction pole of being connected with high temperature resistant heat absorption panel, the one end fixedly connected with heat conduction ball of heat conduction pole, and a plurality of radiating fin of fixedly connected with on the heat conduction ball, heat transmission for the heat-conducting piece after the heat of high temperature resistant heat absorption panel absorption glass liquid, the space of heat-conducting piece to drainage cover top heats to let gas be heated the inflation and rise, thereby make during gas faster enters into the elasticity outlet duct, effectively improve the efficiency of blowing bubble.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme is through the creative bubble rate that drives the bubble ware and effectively reduce glass liquid inside in current pouring process that adds, it drives the bubble ware through blowing in the bleb to the glass liquid, utilize the bleb come to take away or eliminate the bleb and effectively reduce the bubble rate in the come-up process, exert the magnetic field that appears simultaneously and disappear in the both sides of mould simultaneously, the appearance messenger of magnetic field drives the elastic outlet duct distortion on the bubble ware, disappearance messenger elastic outlet duct straightening of magnetic field, thereby the intermittent type nature appearance and disappearance in magnetic field make elastic outlet duct switch back and forth between distortion and straightening, make elastic outlet duct disturb to the glass liquid, in order to order about the bubble come-up, thereby further reduce the bubble rate, manpower has been saved compared with prior art, and effectively reduce optical glass's bubble rate.
(2) The bubble driving device in the step S1 comprises a ceramic air blowing pipe, a plurality of circles of air blowing parts are arranged around the bottom end of the ceramic air blowing pipe, each circle of air blowing parts is communicated with the ceramic air blowing pipe through a plurality of ceramic vent pipes, each circle of air blowing parts comprises a plurality of bubble removing balls distributed circumferentially, each two adjacent bubble removing balls are communicated with each other through a ceramic communicating pipe, after air is blown into the ceramic air blowing pipe by an air blowing device, the air sequentially enters each circle of bubble removing balls from inside to outside through the ceramic vent pipes, and the bubble removing balls on each circle are communicated with each other through the ceramic communicating pipes, so that the air can enter each bubble removing ball.
(3) The upper portion of bubble is got rid of the ball and is seted up the chamber of ventilating with ceramic communicating pipe or ceramic breather pipe intercommunication, and the lower part of bubble is got rid of the ball is solid construction, and the upper end intercommunication of bubble gets rid of the ball has elastic outlet duct, and the outside parcel of elastic outlet duct has high temperature resistant protective layer, and the upper end intercommunication of elastic outlet duct has the bubble piece of blowing, and during gaseous cavity of ventilating by the bubble gets rid of the ball enters into elastic outlet duct, and then gaseous big bubble of blowing into to the glass liquid by the bubble piece of blowing.
(4) Elasticity outlet duct includes the main part section, the upper and lower two parts of main part section are inlayed respectively and are had last magnetism section and lower magnetism section, elasticity outlet duct keeps vertical state under natural state, after applying magnetic field, go up magnetism section and lower magnetism section and move to the left and right sides respectively under the attraction in magnetic field, make elasticity outlet duct become the distortion state by vertical state, after magnetic field disappears, elasticity outlet duct resumes vertical state under self elastic action, like this in the appearance of magnetic field intermittent type nature and the repeated transform of elasticity outlet duct under the disappearance state, thereby disturb the glass liquid, in order to order about the bubble come-up.
(5) Go up the magnetism opposite of magnetism section and magnetism section down, go up the magnetism section and attract with the left magnetic field of mould mutually, the magnetism section attracts with the magnetic field on mould right side mutually down, when magnetic field appears, goes up the magnetism section and is pulled to the left by the left magnetic field, and the magnetism section is pulled to the right by the magnetic field on right side down to let the elasticity outlet duct become the distortion state.
(6) The high temperature resistant protective layer adopts the sealed gluey material of high temperature resistant, and the sealed gluey protection elasticity outlet duct of high temperature resistant is melted by the high temperature of glass liquid for elasticity outlet duct can normally work, and the thickness of high temperature resistant protective layer is greater than the thickness of elasticity outlet duct, is in order to reduce the heat of transmitting to the elasticity outlet duct through the high temperature resistant protective layer.
(7) The upper end of the air blowing bubble piece is of a concave wedge-shaped surface structure, so that resistance which is applied when the air blowing bubble piece is pulled upwards is reduced, a T-shaped air outlet cavity communicated with the elastic air outlet pipe is formed in the air blowing bubble piece, and therefore the air outlet of the air blowing bubble piece is arranged on two sides rather than on the upper portion, and glass liquid can be effectively prevented from being filled into the air blowing bubble piece in the moving process and being blocked to blow.
(8) The inside fixedly connected with drainage cover in chamber of ventilating, and drainage cover and pottery communicating pipe and elasticity outlet duct intercommunication simultaneously, the drainage cover is in order to dwindle the inside gas storage space in chamber of ventilating to let during gas can be direct and quick entering into elasticity outlet duct, avoid producing the air current disturbance and influence the effect of blowing bubble.
(9) The upper portion lateral wall that the ball was got rid of to the bubble is inlayed and is had a plurality of high temperature resistant endothermic panels, and the heat conduction piece that fixedly connected with and high temperature resistant endothermic panel are connected in the space between the ball lateral wall is got rid of to drainage cover and bubble, the heat conduction piece includes the heat conduction pole of being connected with high temperature resistant endothermic panel, the one end fixedly connected with heat conduction ball of heat conduction pole, and a plurality of radiating fin of fixedly connected with on the heat conduction ball, the heat conduction piece is given after the heat of high temperature resistant endothermic panel absorption glass liquid, the heat conduction piece heats the space of drainage cover top, in order to let gas be heated the inflation and rise, thereby make gaseous faster get into in the elasticity outlet duct, the efficiency of blowing bubble is effectively improved.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a diagram of the bubble deflector of the present invention before operation;
FIG. 3 is a state diagram of the bubble expeller of the present invention in operation;
FIG. 4 is a schematic top view of the bubble expeller of the present invention;
FIG. 5 is a schematic cross-sectional view of a bubble exclusion sphere of the present invention;
fig. 6 is a schematic cross-sectional structure diagram of the elastic air outlet pipe of the present invention.
The reference numbers in the figures illustrate:
1 ceramic air blowing pipe, 2 ceramic air vent pipe, 3 bubble removing balls, 4 ceramic communicating pipe, 5 elastic air outlet pipe, 501 main body section, 502 upper magnetic section, 503 lower magnetic section, 6 high temperature resistant protective layer, 7 air blowing bubble piece, 8 drainage cover, 9 high temperature resistant heat absorbing panel and 10 heat conducting piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1-6, a process for casting high refractive index optical glass, referring to fig. 1-3, includes the following steps:
s1, preparing a casting mold, coating a release agent in the mold, placing the foam driver into the mold, communicating the upper end of the foam driver with an air blowing device, and starting the air blowing device;
s2, injecting the smelted molten glass into a mold, blowing large bubbles into the molten glass by a bubble driver, and taking or eliminating small bubbles by the large bubbles in the floating process so as to reduce the bubble rate in the molten glass;
s3, simultaneously applying magnetic fields with the same strength and synchronously and intermittently appearing and disappearing on two sides of the mold, and disturbing the inside of the molten glass while blowing air by the bubble driver under the action of the magnetic fields to enable bubbles to float upwards to help to remove the bubbles and further reduce the bubble rate;
and S4, after the magnetic field is applied, slowly pulling the bubble driving device upwards to enable the bubble driving device to upwards discharge bubbles from the bottom of the molten glass until the bubble driving device is completely pulled out of the molten glass, and demoulding after the molten glass is cooled.
Referring to fig. 4, the bubble driving device in the step S1 includes a ceramic blowing tube 1, a plurality of circles of blowing members are disposed around the bottom end of the ceramic blowing tube 1, each circle of blowing member is communicated with the ceramic blowing tube 1 through a plurality of ceramic vent tubes 2, each circle of blowing member includes a plurality of bubble removing balls 3 (ceramic material or other high temperature resistant material may be selected) distributed circumferentially, and a ceramic communicating tube 4 is communicated between two adjacent bubble removing balls 3, after the blowing device blows gas into the ceramic blowing tube 1, the gas sequentially enters each circle of bubble removing balls 3 through the ceramic vent tubes 2 from inside to outside, and the bubble removing balls 3 on each circle are communicated with each other through the ceramic communicating tube 4, so as to ensure that the gas can enter each bubble removing ball 3;
referring to fig. 5, the upper portion of the bubble removing ball 3 is provided with a ventilation cavity communicated with the ceramic communicating tube 4 or the ceramic vent tube 2, the lower portion of the bubble removing ball 3 is of a solid structure, the inside of the ventilation cavity is fixedly connected with a drainage cover 8, the drainage cover 8 is of a horn-shaped structure with a wide bottom and a narrow top, the drainage cover 8 is made of a high-temperature-resistant heat-conducting material, the drainage cover 8 is simultaneously communicated with the ceramic communicating tube 4 and the elastic vent tube 5, the drainage cover 8 is used for reducing the gas storage space inside the ventilation cavity so that gas can directly and rapidly enter the elastic vent tube 5 to avoid the influence of air flow disturbance on the effect of blowing bubbles, the outer side wall of the upper portion of the bubble removing ball 3 is embedded with a plurality of high-temperature-resistant heat-absorbing panels 9, a heat-conducting member 10 connected with the high-temperature-resistant heat-absorbing panels 9 is fixedly connected in the space between the drainage cover 8 and the side wall of the bubble removing ball 3, the heat-conducting member 10 comprises a heat-conducting rod connected with the high-temperature-resistant heat-absorbing panels 9, one end of the heat conducting rod is fixedly connected with a heat conducting ball, a plurality of radiating fins are fixedly connected to the heat conducting ball, the high-temperature-resistant heat absorption panel 9 absorbs heat of the glass liquid and then transmits the heat to the heat conducting piece 10, and the heat conducting piece 10 heats the space above the drainage cover 8 to enable the gas to be heated, expanded and raised, so that the gas can enter the elastic gas outlet pipe 5 more quickly, and the bubble blowing efficiency is effectively improved;
referring to fig. 5-6, the upper end of the bubble removing ball 3 is connected to an elastic air outlet tube 5 (this is a known technology known to those skilled in the art, and the specific material thereof can be selected according to actual requirements and will not be described in detail herein), the elastic air outlet tube 5 includes a main body section 501, the upper and lower portions of the main body section 501 are respectively embedded with an upper magnetic section 502 and a lower magnetic section 503, the elastic air outlet tube 5 is kept in a vertical state in a natural state, after a magnetic field is applied, the upper magnetic section 502 and the lower magnetic section 503 are respectively moved to the left and right sides under the attraction of the magnetic field, so that the elastic air outlet tube 5 is changed from the vertical state to a twisted state, after the magnetic field disappears, the elastic air outlet tube 5 is restored to the vertical state under the action of its own elastic force, so that the elastic air outlet tube 5 is repeatedly changed in the intermittent appearing and disappearing, the magnetism of the upper magnetic section 502 is opposite to that of the lower magnetic section 503, the upper magnetic section 502 is attracted with the magnetic field on the left side of the mold, the lower magnetic section 503 is attracted with the magnetic field on the right side of the mold, when the magnetic fields appear, the upper magnetic section 502 is pulled leftwards by the magnetic field on the left side, and the lower magnetic section 503 is pulled rightwards by the magnetic field on the right side, so that the elastic air outlet pipe 5 is in a twisted state;
referring to fig. 5, the outer side of the elastic outlet tube 5 is wrapped by a high temperature resistant protective layer 6, the high temperature resistant protective layer 6 is made of a high temperature resistant sealant (the working temperature is higher than the melting temperature of the optical glass, and the specific material can be selected according to the actual requirement, which is not described in detail herein), when the optical fiber is used in detail, the high temperature resistant protective layer 6 is coated on the periphery of the elastic outlet tube 5, and can be used after the optical fiber is solidified, the high temperature resistant sealant protects the elastic outlet tube 5 from being melted by the high temperature of the molten glass, so that the elastic outlet tube 5 can work normally, and the thickness of the high temperature resistant protective layer 6 is larger than that of the elastic outlet tube 5, in order to reduce the heat transferred to the elastic outlet tube 5 through the high temperature resistant protective layer 6, the upper end of the elastic outlet tube 5 is communicated with a bubble blowing member 7, the gas enters the elastic outlet tube 5 from the ventilation cavity of the bubble removing ball 3, and then the gas blows large bubbles into the molten glass through the bubble blowing member 7, the upper end of the air bubble piece 7 is of a concave wedge-shaped surface structure, so that resistance borne by the air bubble driving device when the air bubble driving device is pulled upwards is reduced, a T-shaped air outlet cavity communicated with the elastic air outlet pipe 5 is formed in the air bubble piece 7, and therefore the air outlet of the air bubble piece 7 is formed in two sides instead of the upper portion, and glass liquid can be effectively prevented from being filled into the air bubble piece 7 in the upward moving process and being blocked to blow air.
It drives the bubble rate that the bubble ware comes effective reduction glass liquid inside through creative joining in current pouring process, it drives the bubble ware through blowing in the big bubble to glass liquid, it effectively reduces the bubble rate to utilize the big bubble come to take away or eliminate the small bubble among the come-up process, exert the magnetic field that appears simultaneously and disappear in the both sides of mould simultaneously, the appearance of magnetic field makes the distortion of elasticity outlet duct 5 on driving the bubble ware, disappearance messenger elasticity outlet duct 5 of magnetic field straightens, thereby the intermittent type nature appearance and disappearance of magnetic field make elasticity outlet duct 5 switch back and forth between distortion and straightening, make elasticity outlet duct 5 disturb to glass liquid, in order to order about the bubble come-up, thereby further reduce the bubble rate, the human labor has been saved compared with prior art, and effectively reduce optical glass's bubble rate.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A casting molding process of high-refractive-index optical glass is characterized in that: the method comprises the following pouring steps:
s1, preparing a casting mold, coating a release agent in the mold, placing the foam driver into the mold, communicating the upper end of the foam driver with an air blowing device, and starting the air blowing device;
s2, injecting the smelted molten glass into a mold, blowing large bubbles into the molten glass by a bubble driver, and taking or eliminating small bubbles by the large bubbles in the floating process so as to reduce the bubble rate in the molten glass;
s3, simultaneously applying magnetic fields with the same strength and synchronously and intermittently appearing and disappearing on two sides of the mold, and disturbing the inside of the molten glass while blowing air by the bubble driver under the action of the magnetic fields to enable bubbles to float upwards to help to remove the bubbles and further reduce the bubble rate;
and S4, after the magnetic field is applied, slowly pulling the bubble driving device upwards to enable the bubble driving device to upwards discharge bubbles from the bottom of the molten glass until the bubble driving device is completely pulled out of the molten glass, and demoulding after the molten glass is cooled.
2. The cast molding process of high refractive index optical glass according to claim 1, wherein: the bubble driving device in the step S1 comprises a ceramic air blowing pipe (1), a plurality of circles of air blowing pieces are arranged around the bottom end of the ceramic air blowing pipe (1), each circle of air blowing pieces is communicated with the ceramic air blowing pipe (1) through a plurality of ceramic vent pipes (2), each circle of air blowing pieces comprise a plurality of bubble removing balls (3) distributed in the circumferential direction, and two adjacent bubble removing balls (3) are communicated with one another through ceramic communicating pipes (4).
3. The cast molding process of high refractive index optical glass according to claim 2, wherein: the upper portion of bubble is got rid of ball (3) and is seted up the chamber of ventilating with ceramic communicating pipe (4) or ceramic breather pipe (2) intercommunication, and the lower part that ball (3) were got rid of to the bubble is solid construction, the upper end intercommunication elasticity outlet duct (5) of ball (3) are got rid of to the bubble, and the outside parcel of elasticity outlet duct (5) has high temperature resistant protective layer (6), the upper end intercommunication of elasticity outlet duct (5) has gas bubble spare (7).
4. The cast molding process of high refractive index optical glass according to claim 3, wherein: the elastic air outlet pipe (5) comprises a main body section (501), and an upper magnetic section (502) and a lower magnetic section (503) are respectively embedded in the upper part and the lower part of the main body section (501).
5. The casting process of claim 4, wherein: the magnetism of the upper magnetic section (502) is opposite to that of the lower magnetic section (503), the upper magnetic section (502) is attracted to the magnetic field on the left side of the mold, and the lower magnetic section (503) is attracted to the magnetic field on the right side of the mold.
6. The cast molding process of high refractive index optical glass according to claim 3, wherein: the high-temperature-resistant protective layer (6) is made of high-temperature-resistant sealant, and the thickness of the high-temperature-resistant protective layer (6) is larger than that of the elastic air outlet pipe (5).
7. The cast molding process of high refractive index optical glass according to claim 3, wherein: the upper end of the air blowing bubble piece (7) is of a concave wedge-shaped surface structure, and a T-shaped air outlet cavity communicated with the elastic air outlet pipe (5) is formed in the air blowing bubble piece (7).
8. The cast molding process of high refractive index optical glass according to claim 3, wherein: the inside fixedly connected with drainage cover (8) in the chamber of ventilating, and drainage cover (8) communicate with ceramic communicating pipe (4) and elasticity outlet duct (5) simultaneously.
9. The cast molding process of high refractive index optical glass according to claim 8, wherein: the drainage cover (8) is of a horn-shaped structure with a wide lower part and a narrow upper part, and the drainage cover (8) is made of high-temperature-resistant heat conduction materials.
10. The cast molding process of high refractive index optical glass according to claim 3, wherein: the utility model discloses a heat conduction piece, including bubble get rid of ball (3), the upper portion lateral wall of bubble get rid of ball (3) is inlayed and is had a plurality of high temperature resistant heat absorption panel (9), and drainage cover (8) and bubble get rid of heat conduction piece (10) that fixedly connected with and high temperature resistant heat absorption panel (9) are connected in the space between ball (3) lateral wall, heat conduction piece (10) include the heat conduction pole of being connected with high temperature resistant heat absorption panel (9), the one end fixedly connected with heat conduction ball of heat conduction pole, and a plurality of radiating fin of fixedly connected with on the heat conduction ball.
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| CN202110697185.6A CN113387547A (en) | 2021-06-23 | 2021-06-23 | Casting molding process of high-refractive-index optical glass |
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| CN202110697185.6A CN113387547A (en) | 2021-06-23 | 2021-06-23 | Casting molding process of high-refractive-index optical glass |
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| CN202046986U (en) * | 2011-04-22 | 2011-11-23 | 湖北新华光信息材料有限公司 | Bubbling homogenization device for glass melting |
| CN111574033A (en) * | 2020-05-15 | 2020-08-25 | 南通市国光光学玻璃有限公司 | Low-viscosity optical glass dynamic supplement type leaking molding process |
| WO2020178051A1 (en) * | 2019-03-05 | 2020-09-10 | Abb Schweiz Ag | A continuous glass melting tank with an immersed stirring body |
| CN212127956U (en) * | 2020-04-27 | 2020-12-11 | 盐城晶鑫光学科技有限公司 | High efficiency optical glass processing is with smelting device |
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- 2021-06-23 CN CN202110697185.6A patent/CN113387547A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202046986U (en) * | 2011-04-22 | 2011-11-23 | 湖北新华光信息材料有限公司 | Bubbling homogenization device for glass melting |
| WO2020178051A1 (en) * | 2019-03-05 | 2020-09-10 | Abb Schweiz Ag | A continuous glass melting tank with an immersed stirring body |
| CN212127956U (en) * | 2020-04-27 | 2020-12-11 | 盐城晶鑫光学科技有限公司 | High efficiency optical glass processing is with smelting device |
| CN111574033A (en) * | 2020-05-15 | 2020-08-25 | 南通市国光光学玻璃有限公司 | Low-viscosity optical glass dynamic supplement type leaking molding process |
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Application publication date: 20210914 |