WO2011122733A1

WO2011122733A1 - Apparatus for manufacturing a glass optical device, and method for manufacturing a glass optical device

Info

Publication number: WO2011122733A1
Application number: PCT/KR2010/003292
Authority: WO
Inventors: 강상도; 장광호; 권형준; 오성하; 백승준; 김형준
Original assignee: (주) 한빛옵토라인
Priority date: 2010-04-02
Filing date: 2010-05-25
Publication date: 2011-10-06
Also published as: KR20110111184A; KR101160092B1

Abstract

The present invention relates to a method for manufacturing a glass optical device, and an apparatus for manufacturing a glass optical device, wherein the method comprises the steps of: using a glass melting unit to melt a glass raw material; using a mold conveying apparatus to convey a lower mold to the lower portion of a fixed amount supplying apparatus, in a heating chamber maintained at a certain temperature; using the fixed amount supplying apparatus to feed the melted glass raw material into the lower mold, while controlling the melted glass raw material in terms of weight and shape thereof; using the mold conveying apparatus to convey the lower mold to the lower portion of an upper mold, in the heating chamber; lowering the upper mold to the upper portion of the lower mold, in the heating chamber, and pressure-forming the melted glass raw material; ejecting a glass optical device formed in the upper mold and the lower mold, and conveying the glass optical device to an annealing furnace; and annealing the glass optical device. According to the present invention, precise inputting of melted glass raw material, a mold pressurizing process, and an annealing process can be integrated, without using a pre-form GOB, so as to enable mass production of glass optical devices.

Description

Glass optical device manufacturing apparatus and glass optical device manufacturing method

The present invention relates to an apparatus for manufacturing a glass optical device and a method for manufacturing a glass optical device, and more particularly, to accurate molten glass material without using a processed gob (pre-form GOB or ball GOB). The present invention relates to a method for manufacturing a glass optical device in a large amount by integrating a feeding process, a mold pressing step, and a slow cooling process, and a glass optical device manufacturing apparatus.

Glass optical devices such as lenses, prisms, and windows using conventional glass materials are manufactured by directly processing glass materials into desired shapes and then applying optical properties through polishing. However, this is a task that requires skilled skills, and particularly in the case of precision optical devices such as aspherical optical devices, there are many difficulties in terms of technology, time, and cost.

In the conventional method of manufacturing an optical device, the optical glass material is processed in the form of a pre-form GOB in advance in accordance with the optical device to be manufactured, put into a mold, and then the optical device is molded by heating and pressing. And a method of forming a glass rod-shaped glass material by melting, transferring it to a mold and cutting, heating, and pressing.

Recently, a molding method is known in which a preform gob is prepared by injecting a preform gob into a mold for preform rather than material processing, thereby preparing a preform gob, and then injecting the manufactured preform gob into another optical device manufacturing mold.

These mentioned methods enable the direct manufacture of glass materials in the desired form, ranging from general optical devices to precision optical devices, depending on the method, and have brought many advances in productive and technical aspects compared to the past methods.

However, these conventional methods have many problems.

The method of using preform gobs introduced in Japanese Patent Publication No. 61-32263 uses glass materials processing techniques such as curvature grinding and polishing, which are close to the final optical element, which requires the skilled technique and time mentioned before optical element manufacturing. The preform gob must be manufactured by using high-temperature mold, which is the core of molding, by applying high heat directly. There are many limitations in terms of time and money. In addition, as the process of curvature grinding and polishing, such as to produce the preform gob may be lost (glass) material (loss).

The method of melting and cutting the glass rod, which is the glass material introduced in Korean Patent Application No. 193-0004316, into the mold is difficult to control precise glass material input, and the melting and pressing process of the glass rod does not proceed integrally. Loss and defect of glass material occurs during the movement and cutting process of molten glass rod for optical device manufacturing. In addition, this method is incomplete for obtaining an optical element of high precision, and is narrowly used to manufacture all optical elements, and is mainly used only for the manufacture of low precision glass cups, glass structures, lighting optical elements, and the like.

A method of manufacturing an optical device by injecting a molten glass material into a preform mold to make a proform gob, then putting the manufactured preform gob back into a mold for manufacturing an optical device, and heating and compressing requires two or more heating and pressing processes. Therefore, the production time is long, requires two or more heating and pressing mechanisms, there is a problem that the consumption of expensive mold increases, the production cost increases.

The problem to be solved by the present invention is to solve the above-mentioned problems of the prior art without the use of a preform gob, it is possible to manufacture a glass optical device in a large amount by integrating the precise molten glass material injection, mold pressing process, slow cooling process The present invention provides a method and apparatus for manufacturing a glass optical device.

The present invention comprises the steps of melting a glass material using a glass melting part, transferring a lower mold to a lower portion of a fixed quantity supply device using a mold transfer device in a heating chamber maintained at a constant temperature, and a molten glass material The molten glass material into the lower mold while controlling the desired weight and shape using a fixed-quantity feeding device; and transferring the lower mold to the lower portion of the upper mold in the heating chamber by using a mold transfer device; Pressing down the upper mold to the upper portion of the lower mold in the chamber to press-mold the molten glass material, taking out the glass optical element formed and molded from the upper mold and the lower mold, and transferring the glass optical element to the slow cooling furnace; It provides a method of manufacturing a glass optical device comprising a slow cooling.

The manufacturing method of the glass optical device, the lower mold in order to minimize the internal stress and thermal stress caused by the temperature difference between the surface of the lower mold and the molten glass material before the lower mold is transferred to the lower portion of the metering device. The preheating unit may further include the step of being preheated.

Taking out the glass optical element and transferring the glass optical element to the slow cooling furnace includes moving the upper mold upward to open the upper portion of the glass optical element, and moving the lower mold to the takeout part using the mold transfer device. And removing the glass optical element from the lower mold by using the extraction means, and transferring the glass optical element to the slow cooling furnace by using the extraction means.

Taking out the glass optical element and transferring the glass optical element to a slow cooling furnace includes moving the upper mold upward to open the upper portion of the glass optical element, and detaching the glass optical element from the lower mold using a takeout means. And transferring the glass optical element to a slow cooling furnace by using the extraction means.

It is preferable that the molten glass material has a viscosity in the range of 10 ³ to 10 ¹⁰ poise, and the temperature in the heating chamber is kept constant in the temperature range of 400 ° C to 800 ° C.

The upper mold is located on the upper side next to the lower mold at the position where the molten glass material is injected, and when the lower mold is moved to the lower side, the upper mold is lowered to press and mold the molten glass material injected into the lower mold, and the pressing force of the upper mold is applied. It is preferable that it has the range of 100 kg / cm <2> -500 kg / cm <2>.

In addition, the present invention, a lower mold provided to be movable along the movement path constituting the cycle, a mold transfer device for moving the lower mold along the movement path constituting the cycle, and is provided to be movable up and down, When the mold is transported to the lower side, the upper mold for lowering the press-molded molten glass material, the region into which the molten glass material is put into the lower mold, and surrounding the region where the press-molding is performed by the upper mold and the lower mold. It provides a glass optical device manufacturing apparatus including a heating chamber for maintaining a constant temperature while providing a space.

The glass optical device manufacturing apparatus, the glass melting portion for melting the glass material, and the quantity connected to the molten glass material to the lower mold while controlling the molten glass material connected to the glass melting portion to the desired weight and shape It may further include a supply device.

The glass optical device manufacturing apparatus includes: a takeout means for taking out and transporting a glass optical element formed by compression molding by the upper mold and the lower mold to a slow cooling furnace, and slowly cooling the glass optical element transferred by the takeout means. A slow cooling furnace may be further included.

The lower mold, the preheating portion is pre-heated, the molten glass material input portion through which the molten glass material is put into the lower mold through the quantitative supply device, the lower mold is moved to the lower position where the upper mold is melted by pressing by the upper mold and the lower mold It may have a molding path in which the glass material is molded, and a movement path that cycles the extraction part for taking out the glass optical element from the lower mold in order to transfer the glass optical element formed by molding the molten glass material to the slow cooling furnace.

The heating chamber is preferably provided so that the molten glass material can be kept constant in the temperature range of 400 ℃ to 800 ℃ having a viscosity of 10 ³ ~ 10 ¹⁰ poise (poise) range.

The upper mold is located on the upper side next to the lower mold at the position where the molten glass material is injected, and when the lower mold is moved to the lower side, the upper mold is lowered to press the molten glass material injected into the lower mold, and the press molding is performed. It is preferable that the force moved to the upper side and the pressure applied by the upper mold have a range of 100 kg / cm 2 to 500 kg / cm 2.

According to the present invention, since the preform gob is not used, the processing time for manufacturing the preform gob can be shortened, and the processing cost for manufacturing the preform gob can be reduced.

In addition, according to the present invention, it is composed of an integral type in which the steps of melting the glass material, precisely input the molten glass material, molding and slow cooling are precisely controlled, saving manufacturing time, no loss of raw materials, and excellent glass optical elements. There is an advantage to manufacture.

In addition, in the existing processes such as direct injection of molten glass material and glass rod melting injection method, problems caused by vibrations between thermal control and manual movement, and post-processing such as cutting and centering after optical device manufacturing However, in the present invention, such a problem can be improved and cost can be manufactured as well as glass optics excellent in quality and performance.

In addition, according to the present invention, there is an advantage that can mass-produce a high quality glass optical device based on economical and high productivity.

In addition, according to the present invention, a glass optical device that can be widely applied to various optical device industries such as optical lenses, display lighting, optical communication, and light fusion technology using glass materials can be manufactured regardless of performance and size.

1 is a flowchart illustrating a method of manufacturing a glass optical device according to a preferred embodiment of the present invention.

2 is a view schematically showing a glass optical device manufacturing apparatus according to a preferred embodiment of the present invention.

3 is a view schematically showing the glass melter and the metering device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following embodiments are provided to those skilled in the art to fully understand the present invention, and may be modified in various forms, and the scope of the present invention is limited to the embodiments described below. It doesn't happen. Like numbers refer to like elements in the figures.

According to the present invention, a glass material of a tablet type is introduced into a glass melting furnace to melt a glass material, and then the molten glass material is introduced while the molten glass material is controlled to a desired weight and shape by using a fixed amount feeder. In this case, the molten glass material is directly injected into the lower mold in the heating chamber for controlling the molding temperature and pressurized into the upper mold to manufacture the glass optical device. The formed glass optical element is manufactured as a glass optical element product while being passed through a stepwise and precise slow cooling furnace capable of being prevented from changing optical characteristics such as refractive index by being transferred from the lower mold to the slow cooling furnace by the extraction means.

1 is a flowchart illustrating a method of manufacturing a glass optical device according to a preferred embodiment of the present invention. 2 is a view schematically showing a glass optical device manufacturing apparatus according to a preferred embodiment of the present invention. 3 is a view schematically showing the glass melter and the metering device.

1 to 3, the manufacturing method of the glass optical device of the present invention, by melting the glass material at a suitable and uniform temperature using the glass melting portion 150 (S10) and the mold transfer device ( Transferring the lower mold to the lower portion of the metering supply device 160 in the heating chamber 140 for controlling the molding temperature of the molten glass material using the (120) (S20), and quantified the molten glass material Injecting the molten glass material into the lower mold 110 while controlling to the desired weight and shape using the feeder 160 (S30), and the lower portion in the heating chamber 140 by using the mold transfer device 120 Transferring the mold 110 to the lower portion of the upper mold 130 (S40), lowering the upper mold 130 to the upper portion of the lower mold 110, and pressing the molded molten glass material (S50); Slow cooling by taking out the glass optical element formed and molded in the upper mold 130 and the lower mold 110 In a step (S60) and a step (S70) that gradually cooled the glass optical element to transfer.

Glass optical device manufacturing apparatus of the present invention, the lower mold 110 is provided to be movable along the movement path constituting the cycle, and the mold transfer device 120 for moving the lower mold 110 along the movement path constituting the cycle ), And the upper mold 130 and the lower mold 110 for pressing the molten glass material by pressing down when the lower mold 110 is transferred to the lower side and the molten glass material is injected into the lower mold 110. (A) and the heating chamber 140 for maintaining at a constant temperature while providing a space surrounding the region (B) where the compression molding is made by the upper mold 130 and the lower mold 110. The glass optical device manufacturing apparatus, the glass mold 150 for melting the glass material, and the lower mold 110 is connected to the glass melt 150, while controlling the molten glass material to the desired weight and shape It may further include a quantitative supply device 160 for injecting the molten glass material. The glass optical device manufacturing apparatus includes a drawing unit (not shown) for taking out and transporting the glass optical element formed by compression molding by the upper mold 130 and the lower mold 110 to a slow cooling furnace, and the extracting means. A slow cooling furnace (not shown) may be further included for slow cooling the glass optical element transferred by the.

The glass melting part 150 includes a heating part 152 capable of melting the glass material at an appropriate and uniform temperature, and a crucible

type melting furnace

154a, 154b, and 154c for stably storing the molten glass material. do. At this time, the heating method of the heating unit 152 may be a heating method using electricity, gas, heavy oil, etc., a heating method using a high frequency induction heating and a halogen lamp may also be used. The temperature of the

melting furnaces

154a, 154b, and 154c heated by the heating part 152 has the range of 1000 to 2000 degreeC normally. At this time, the viscosity of the molten glass material by the heating of the heating unit 152 is 1 to 10It has a poise degree and can control the temperature according to the type of molten glass material. The temperature of the heating unit 152 has a feature that can control the temperature according to the properties of the glass material. The configuration of the melting furnace (154a, 154b, 154c) includes an inner melting furnace made of a heat-resistant material frame (154a) and a crucible-shaped platinum (Pt) frame (154b) having a thickness of 0.5 to 2mm in the outermost, A refractory filler is provided between the ash frame 154a and the platinum (Pt) frame 154b to form a structure in which the refractory 154c is filled. In this case, the refractory refers to a non-metal inorganic material that is poorly soluble at a high temperature used in high temperature industry, the lowest temperature that the refractory can withstand is about 1,580 ℃, the material that can be used at a temperature higher than that is called a refractory. Refractories are typically Al₂O₃And ZrO₂ Etc. In addition, TiO₂, CaO, MgO, Na₂O and the like may be used to suit the purpose.

The metering supply device 160 is connected to the lower portion of the glass melter 150 is a device for injecting the molten glass material into the lower mold (110). The quantitative supply device 160 is a plunger (162) for controlling the discharge of the molten glass material through the stroke (stroke) control, and the weight of the molten glass material by controlling the discharge inner diameter during the discharge of the molten glass material A nozzle portion 164 for controlling the shape, and a cutting portion 166 for cutting the discharged molten glass material to the desired weight and shape using the timing of the cutting. Side of the flanger 162 may be further provided with a wing-shaped control unit (not shown), the control unit serves to prevent the inflow of bubbles. Metering supply device 160 is one of the device elements that play the most important role in the size, shape, quality of the product to be produced by controlling the uniform amount and shape of the molten glass material. The aforementioned flanger 162, the nozzle unit 164, and the cutting unit 166 may be made of cast iron or cemented carbide, and the outside thereof may be made of platinum (pt).

The mold transfer device 120 may precisely control the position of the lower mold 110 by using a precise sub-motor, and may be of a type in which a plurality of lower molds 110 are directly fixed. A plurality of lower mold 110 is provided to be movable by the mold transfer device 120, the movement path of each of the lower mold 110 forms a path to return to the original position in a cycle (cycle). When the precise position control of the lower mold 110 is not performed by the mold transfer device 120, serious problems may occur in the quality of the produced product due to an error of material input, molding, and take-out. At this time, the lower mold 110 by the mold transfer device 120 is taken out into the slow cooling furnace by the molten glass material input portion (region A), the molding portion (region B) by the upper mold 130, the robot is molded. It has a moving path based on the take-out portion (region C), the preheating portion (region D) for preheating the lower mold (110).

The lower mold 110 has a path including a molten glass material input part, a molding part, a blowout part, and a preheating part, and is provided to be movable while forming a cycle. The movement path of the lower mold 110 is formed in the form of a circular transfer path and moves along the initial starting point to form a cycle of reaching the initial starting point again. For example, when the lower mold 110 starts from a preheating unit where the preheating is performed at a predetermined temperature by a pin heater or the like, the molten glass material is introduced into the lower mold 110 through the metering supply device 160. After passing through the molten glass material input portion, the upper mold 130 is moved to the lower position where the molten glass material is molded by the compression by the upper mold 130 and the lower mold 110, the molten glass material is molded In order to transfer the formed glass optical element to the slow cooling furnace, it has a circular conveyance (movement) path passing through the extraction part which takes out the glass optical element from the lower mold 110, and the first starting point reaches the preheating part again. The material of the lower mold 110 may be cemented carbide, graphite, silicon carbide (SiC), stainless steel, boron nitride and the like.

The upper mold 130 is located on the upper side of the lower mold (110). The upper mold 130 may be provided with two or more as shown in FIG. The upper mold 130 is provided to be movable up and down, and when the lower mold 110 into which the molten glass material is injected moves and is positioned below the upper mold 130, the upper mold 130 is lowered to cover the lower mold 110. The molten glass material can be pressed. The vertical movement of the upper mold 130 may use a pneumatic cylinder or the like. Cemented carbide, graphite, silicon carbide (SiC), stainless steel, boron nitride, etc. may be used as the material of the upper mold 130.

The heating chamber 140 maintains or controls the optimum molding temperature when the molten glass material is introduced into the lower mold 110, as well as may be generated while the heat is rapidly cooled after molding by the upper mold 130. It is provided to prevent thermal strain. The heating chamber 140 has a space surrounding the region A into which the molten glass material is injected into the lower mold 110 and the region B through which the compression molding is performed by the upper mold 130 and the lower mold 110. Maintain constant temperature while providing. In addition, the heating chamber 140 may provide a space that partially surrounds the region D in which the lower mold 110 is preheated. The heating system of the heating chamber 140 may be a heating method using electricity, gas, heavy oil, and the like, and may also include a heating method using high frequency induction heating and a halogen lamp. At this time, the temperature in the heating chamber 140 may be applied differently depending on the annealing temperature (annealing temperature) of the glass material, and generally has a temperature range of about 400 ℃ to 800 ℃. In this temperature range, the glass material has a viscosity of about 10 ³ to ^{10 10} poise. The heating chamber 140 is formed in a shape surrounding the lower mold 110 and the upper mold 130 described above, the molten glass material in the heating chamber 140 (made in the area A), the upper mold 130 The molding process is performed in the region B, and the extraction process of the glass optical elements formed from the upper mold 130 and the lower mold 110 is generally performed in the region C, but in the region B after the molding is completed. May be made). The upper portion of the heating chamber 140 may be provided separately from the molten glass material input portion and the slow cooling furnace transfer portion of the molded glass optical element. In addition, the heating chamber 140 may include a cooling system, and the cooling system may be water-cooled, gas-cooled, or air-cooled or oil-cooled.

The glass optical element formed by molding the molten glass material by the upper mold 130 and the lower mold 110 is taken out by a extraction means such as a robot and transferred to a slow cooling furnace. The take-out means may be a take-out and transfer device such as a robot with adsorption capacity, and the slow cooling furnace transfer of the glass optical element by the take-out means may be performed in an automated manner. The extraction means may be provided to directly adsorb and transport the glass optical element, and the extraction means may be selectively configured according to the size and shape of the glass optical element.

The slow cooling furnace is configured in the form of a chamber, and is configured to control heat according to the material properties of the glass optical device in order to prevent shrinkage, optical properties, and appearance deformation that may occur while heat is rapidly cooled after molding. In general, glass materials have a poor thermal conductivity, and as a result of cooling, a large temperature difference is generated between the surface and the interior, and the interior is subjected to a tensile stress, so that the strain acts as a detrimental factor for the optical properties. The slow cooling furnace is responsible for the step and uniform slow cooling of the molded glass optical device. When the formed glass optical element is rapidly cooled, the transmittance, refractive index, and appearance are poor on either side of the glass optical element.Can be cracked or even cracked. Slow cooling furnace 10, the viscosity of the completed molding of the glass optical device¹⁰To 10¹³Two or more stages, such as stage 1, 10, to allow slow slow cooling within a range that does not affect optical performance by poise.¹³To 10¹⁴Poise, step 2 10¹⁴To 10¹⁵Poise, step 3 10¹⁵To 10¹⁶It is preferable that slow cooling progresses in multiple steps, such as poise. Different temperature stages can be set depending on the characteristics of the glass material, and other temperature stages can be added for precise slow cooling.

Hereinafter, a method of manufacturing a glass optical device according to a preferred embodiment of the present invention will be described in more detail.

First, the glass material is melted at an appropriate and uniform temperature by using the glass melting part 150. The glass material is put into the melting furnace of the glass melting part 150 and is heated by the heating part so that the glass material is melted. The heating method of the heating unit may be a heating method using electricity, gas, heavy oil, high frequency induction heating, halogen lamp. It is preferable that the temperature of the melting furnace heated by the said heating part has a range of 1000 degreeC-2000 degreeC, and the viscosity of the molten glass material by heating of a heating part is 1-10.It is desirable to have a poise degree. The temperature heated by the heating unit may be controlled to an appropriate temperature according to the type and characteristics of the molten glass material.

The lower mold 110 is transferred to the lower portion of the metering feeder 160 in the heating chamber 140 using the mold transfer device 120. The lower mold 110 may be preheated (done in the D region) by using a pin heater or the like in the preheater before being transferred to the lower portion of the metering device 160. As the preheating of the lower mold 110 is performed, the temperature difference between the surface of the lower mold 110 and the molten glass material becomes smaller, and thus, an advantage of minimizing the internal stress caused by the temperature difference and the resulting thermal stress is obtained. have. The position of the lower mold 110 is precisely controlled by the mold transfer device 120. The temperature of the lower mold 110 is maintained at the optimum molding temperature by the heating chamber 140, and the molten glass material is melted because it is maintained at the molding temperature in the heating chamber 140 even if the lower mold 110 is introduced. The glass material can be maintained at a constant molding temperature to suppress the occurrence of thermal strain. The heating method of the heating chamber 140 may be a heating method using electricity, gas, heavy oil, high frequency induction heating, halogen lamp. The temperature in the heating chamber 140 may be differently applied according to the annealing temperature of the glass material, and generally has a temperature range of about 400 ° C. to 800 ° C., and the viscosity of the molten glass material in the temperature range. Has a range of 10 ³ to 10 ¹⁰ poise.

The molten glass material is injected into the lower mold 110 by controlling the molten glass material to a desired weight and shape using the metering supply device 160. Control the discharge of the molten glass material through stroke control while preventing the inflow of bubbles through the metering supply device 160, and cut the molten glass material discharged at an appropriate timing to cut to the desired weight and shape to melt The glass material is to be injected into the lower mold (110). The viscosity of the molten glass material passing through the cut portion 166 is in the range of 10 ³ to 10 ⁵ poise (poise).

The lower mold 110 is transferred to the lower portion of the upper mold 130 in the heating chamber 140 using the mold transfer device 120. The position of the lower mold 110 is precisely controlled by the mold transfer device 120. The temperature of the lower mold 110 is maintained at the optimum molding temperature by the heating chamber 140, and the molten glass material can be maintained at a constant molding temperature because it is maintained at the molding temperature in the heating chamber 140 It is possible to suppress the occurrence of strain (thermal strain). The temperature in the heating chamber 140 may be differently applied according to the annealing temperature of the glass material, and generally has a temperature range of about 400 ° C. to 800 ° C., wherein the molten glass material is 10 ^It has a viscosity of about 3-10 ¹⁰ poise.

The upper mold 130 is lowered to the upper portion of the lower mold 110 to press-mold the molten glass material. In the pressing molding step, the molten glass material is injected into the lower mold 110 formed in the heating chamber 140 and the lower mold 110 moves under the upper mold 130 located next to the upper mold 130. It proceeds in the form of pressing the upper mold 130. The upper mold 130 is located on the side of the lower mold 110, and when the lower mold 110 is moved below the upper mold 130, the upper mold 130 is lowered by the pneumatic cylinder to lower the upper mold 130 ( The molten glass material located at 110 is pressed to form. It is preferable that the viscosity of the molten glass material during molding is about 10 ⁸ to 10 ¹⁰ poise, and the pressing force of the upper mold 130 preferably has a range of 100 kg / cm 2 to 500 kg / cm 2.

The glass optical elements formed and molded in the upper mold 130 and the lower mold 110 are taken out and transferred to the slow cooling furnace. This will be described in more detail.

When the molten glass material is pressed by the lower mold 110 and the upper mold 130, the upper mold 130 is moved upwards using a pneumatic cylinder to form a molten glass material to form a glass optical element. The top will be open.

When the upper mold 130 is moved to the top, the lower mold 110 is moved to the take-out portion (C region) by the mold transfer device 120. When the lower mold 110 is moved to the extraction portion (region C), the glass optical element is detached from the lower mold 110 and transferred to the slow cooling furnace by using extraction means such as a robot. As another example, the lower mold 110 may be moved to the slow cooling furnace by removing the glass optical element from the lower mold 110 using a takeout means such as a robot without moving to the takeout portion.

The slow cooling furnace transfer of the glass optical element is made by obtaining the glass optical element of a desired shape by molding by the upper mold 130 and the lower mold 110, and then moving the lower mold 110 to the extraction unit along the circular transfer path. . The slow cooling furnace transfer of the glass optical element by the takeout means can be carried out in an automated manner. The transfer of the glass optical device may include a method of directly absorbing and transporting the glass optical device by a extraction unit such as a robot having adsorption ability, and may be selectively configured according to the size and shape of the glass optical device.

The glass optical element transferred by the takeout means is moved to the slow cooling furnace along the slow cooling furnace inlet. In this case, the slow cooling furnace configured in the form of a chamber is configured to control heat according to the material characteristics of the glass optical device in order to prevent shrinkage, optical characteristics, and appearance deformation that may be generated while the heat cools quickly after molding. In general, glass materials have a poor thermal conductivity, and as a result of cooling, a large temperature difference is generated between the surface and the interior, so that the interior is subjected to tensile stress, so that the strain acts as a decisive factor in the optical properties. desirable. The heating chamber 140, which maintains a constant temperature in order to minimize the change in the optical performance of the glass optical device after being transferred to the slow cooling part after molding, is one of the necessary components, and the slow cooling furnace is a stepwise uniformity of the molded glass optical device. In charge of the slow cooling. When the formed glass optical element is rapidly cooled, the transmittance, refractive index, and appearance are poor on either side of the glass optical element.Can be cracked or even cracked. Slow cooling furnace 10, the viscosity of the completed molding of the glass optical device¹⁰To 10¹³Two or more stages, such as stage 1, 10, to allow slow slow cooling within a range that does not affect optical performance by poise.¹³To 10¹⁴Poise, step 2 10¹⁴To 10¹⁵Poise, step 3 10¹⁵To 10¹⁶It is preferable to make slow cooling advance in several steps, such as poise. Different temperature stages can be set depending on the characteristics of the glass material, and other temperature stages can be added for precise slow cooling.

As mentioned above, although preferred embodiment of this invention was described in detail, this invention is not limited to the said embodiment, A various deformation | transformation by a person of ordinary skill in the art within the scope of the technical idea of this invention is carried out. This is possible.

The present invention can produce a glass optical device that can be widely applied to various optical device industries such as optical lenses, display lighting, optical communication, light fusion technology, etc. using glass materials regardless of performance and size.

Claims

Melting a glass material using a glass melting part;

Transferring the lower mold to the lower portion of the metering feeder using a mold transfer device in a heating chamber maintained at a constant temperature;

Injecting the molten glass material into the lower mold while controlling the molten glass material to the desired weight and shape using a metering supply device;

Transferring the lower mold to the lower portion of the upper mold in the heating chamber by using a mold transfer device;

Press molding the molten glass material by lowering the upper mold to the upper portion of the lower mold in the heating chamber;

Taking out the glass optical elements formed and molded in the upper mold and the lower mold and transferring them to the slow cooling furnace; And

A method of manufacturing a glass optical device comprising the step of slowly cooling the glass optical device.
According to claim 1, Before the lower mold is transferred to the lower portion of the metering device,

And preheating the lower mold in the preheater to minimize internal stress and thermal stress caused by the temperature difference between the surface of the lower mold and the molten glass material.
The method of claim 1, wherein the extracting and transferring the glass optical device to a slow cooling furnace comprises:

Moving the upper mold upward to open the upper portion of the glass optical device;

Moving the lower mold to a take-out part by using the mold transfer device;

Detaching the glass optical element from the lower mold by using extraction means; And

And transferring the glass optical element to a slow cooling furnace by using the takeout means.
The method of claim 1, wherein the extracting and transferring the glass optical device to a slow cooling furnace comprises:

Moving the upper mold upward to open the upper portion of the glass optical device;

Detaching the glass optical element from the lower mold by using extraction means; And

And transferring the glass optical element to a slow cooling furnace by using the takeout means.
According to claim 1, wherein the molten glass material has a viscosity in the range of 10 3 ~ 10 10 poise (poise), the temperature in the heating chamber is maintained in a constant temperature range of 400 ℃ to 800 ℃ glass optical Method of manufacturing the device.
According to claim 1, wherein the upper mold is located on the upper side next to the lower mold of the position where the molten glass material is injected, and when the lower mold is moved to the lower side is lowered to press and mold the molten glass material injected into the lower mold and , The pressing force of the upper mold is a method of manufacturing a glass optical element, characterized in that it has a range of 100kg / ㎠ to 500kg / ㎠.
A lower mold provided to be movable along a movement path constituting a cycle;

A mold transfer device for moving the lower mold along a movement path constituting a cycle;

An upper mold provided to be movable up and down, and lowered when the lower mold is transferred downward, the upper mold for compression molding the molten glass material; And

Apparatus for manufacturing a glass optical device comprising a heating chamber for maintaining at a constant temperature while providing a space surrounding the region in which the molten glass material is injected into the lower mold and the region where the pressing mold is formed by the upper mold and the lower mold .
The method of claim 7, wherein

Glass melting part for melting a glass material; And

And a quantitative supply device connected to the glass melting part and inputting the molten glass material to the lower mold while controlling the molten glass material to a desired weight and shape.
The method of claim 7, wherein

Extraction means for taking out the glass optical element formed by compression molding by the upper mold and the lower mold and transferring the glass optical element to a slow cooling furnace; And

And a slow cooling furnace for slowly cooling the glass optical element transferred by the extraction means.
The method of claim 7, wherein the lower mold,

The molten glass material is injected into the lower mold where the molten glass material is injected into the lower mold through the preheating part and the fixed quantity feeding device, which is preheated, and the molten glass material is molded by pressing the upper mold and the lower mold. An apparatus for manufacturing a glass optical element, comprising: a molding unit, and a movement path for circulating the glass optical element taken out from the lower mold to transfer the glass optical element formed by molding the molten glass material to the slow cooling furnace.
The method of claim 7, wherein the heating chamber is characterized in that the molten glass material is provided to be maintained constant in the temperature range of 400 ℃ to 800 ℃ having a viscosity of 10 3 ~ 10 10 poise (poise) range Glass optical device manufacturing apparatus.
The method of claim 7, wherein the upper mold is located on the upper side next to the lower mold of the position where the molten glass material is injected, and when the lower mold is moved to the lower side is lowered to press the molten glass material injected into the lower mold and molded , When the compression molding is made, the upper portion is moved to the upper side, the force pressed by the upper mold is a glass optical device manufacturing apparatus characterized in that it has a range of 100kg / ㎠ ~ 500kg / ㎠.