KR20080089881A - Eyeglass lens - Google Patents

Abstract

A hardening device using microwaves, an eyeglass lens manufacturing method using the same, and eyeglass lenses are provided to execute automation by utilizing controllability, to reduce the investment cost in equipment due to the continuous process, and to cut down the production cost by extending the life time of a glass mold. An eyeglass lens manufacturing method using microwaves comprises the steps of: processing and polishing a mold for casting and assembling upper and lower molds by using a gasket corresponding to the degree of eyeglasses, and then injecting monomer into the mold(S10); hardening monomer into firstly polymerized polymer by irradiating microwaves to the mold containing monomer(S20); producing eyeglass lenses by separating the polymer(S30); trimming the edges of the eyeglass lenses and cleaning the surfaces of the eyeglass lenses(S40); and drying the eyeglass lenses by microwaves and post-hardening the eyeglass lenses at the same time(S50).

Description

Curing apparatus using microwave, manufacturing method of spectacle lens using the same and spectacle lens

1 is a partial cross-sectional view showing a curing device using a microwave according to the present invention,

2 is a partial side cross-sectional view of FIG.

3 is a side view of FIG. 1;

Figure 4 is a flow chart schematically showing a method of manufacturing a spectacle lens using a microwave according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10: microwave irradiation device 20: conveyor

21: transfer means 22: speed control device

23: holder 30: temperature sensor

40: ventilator 50: moisture sensor

60: spectacle lens 70: control unit

100: chamber 100a: opening

The present invention is excellent in the energy saving effect by curing the monomer in a relatively short time using a microwave, shortening the process time, and the spectacle lens curing device using a microwave to provide a uniform shape of the spectacle lens and high quality spectacle lens and It relates to a manufacturing method of the spectacle lens used and the spectacle lens.

In general, plastic lenses are easily scratched due to their low surface hardness, their thickness is small due to their small refractive index values, and they are easy to cause distortion. Extremely strong, not easy to break, good cutting ability, cutting cutting and adhesive workability, excellent heat and chemical resistance, easy dyeing, easy to discolor and easy to discolor, UV below 350nm wavelength Has been used widely since it has the advantage that it almost blocks, and the thermal conductivity is faster than glass lenses, so the defogging time is faster.

However, plastic lenses that are too soft can easily be scratched and stick to moisture, and moisture tends to become water droplets and discolor. In order to compensate for this, the surface is gradually developed by the hard coating and hardening of the surface, and the prevention of water stains by the anti-film treatment.

Such plastic lenses are lighter than glass lenses and are not easily broken, and thus, these plastic lenses have recently been widely used in optical devices such as spectacle lenses and camera lenses. In particular, plastic lenses for eyeglasses are rapidly increasing in common due to high refractive index and low specific gravity of material resins.

As a raw material resin, diethylene glycol bisaryl carbonate resin has been used for a long time, but a urethane resin obtained by reaction of a polyisocyanate compound with a polyol or polythiol compound has recently been developed as a resin having a higher refractive index.

As a manufacturing method of a polyurethane lens, the reaction of the polyisocyanate compound and polyol compound proposed by Unexamined-Japanese-Patent No. 57-136601, for example, the polyisocyanate compound proposed by Unexamined-Japanese-Patent No. 58-164615 Reaction of a polyol compound with a halogen atom, reaction of a polyisocyanate compound proposed in Japanese Patent Application Laid-Open No. 60-194401 with a polyol compound containing a diphenyl sulfide skeleton, Japanese Patent Application Laid-Open No. 60-217229 Reaction of the polyisocyanate compound proposed by the publication with the polyol compound containing a sulfur atom, Unexamined-Japanese-Patent No. 60-199016, Unexamined-Japanese-Patent No. 62-267316, Unexamined-Japanese-Patent No. 63-46213 And hydroxyl groups of polyisocyanate compounds and polyols proposed in Japanese Patent Application Laid-Open No. 5-320301, etc. It is known to use a reaction with a substituted polythiols.

And the plastic lens as described above molds the monomer component having an appropriate refractive index by assembling the mold into the upper and lower molds by using a gasket according to the desired degree for the mold processing, polishing, and mold obtained therefrom. After the polymerized heat treatment of the granulated body, the assembled mold is separated (released) from the polymerized polymer.

In the case of manufacturing a plastic lens by the above-described mold polymerization, Japanese Patent Laid-Open No. 5-212732 discloses a polyisocyanate and a polyol separately by adding various additives to obtain a uniform mixture solution, and degassing them separately. Then, a method of producing a lens having excellent optical performance without bubbles by injecting into a mold for forming a lens while continuously mixing the nutrient solution and casting it into a mold is proposed.

In addition, the polymerization temperature and the polymerization time are important when producing the plastic lens by the above-described casting polymerization.

For example, the temperature required for the primary polymerization is preferably 13 hours at 35 to 60 ° C, 7 hours at 60 to 85 ° C, and 2 hours of post-curing treatment at a temperature within 110 ° C.

However, this method is a technique commonly used in the prior art, and the hot air curing by the conventional mold polymerization, in which a mold is left inside the oven, uses a heating medium by sucking external air, thereby causing the striae to be absorbed. It is difficult to reduce the quality of the product due to optical deformation such as linear or circular portions having different materials and refractive indices, and to reduce the manufacturing cost.

In addition, the process of adding and removing the spectacle lens into the oven requires a lot of manpower, there is a problem that the work process is very complicated and the continuous process is impossible, the productivity is lowered.

Therefore, the present invention has been made to solve the above problems, an object of the present invention is to apply a microwave to the curing and post-cure process of the spectacle lens to shorten the curing time, improve the productivity of the spectacle lens and ease of control The present invention provides a curing apparatus using microwaves to reduce the production cost by reducing the facility investment cost due to the continuous process and extending the life of the glass mold.

In addition, another object of the present invention is to provide a spectacle lens manufacturing method that can obtain a high-quality spectacle lens by applying the spectacle lens curing device using a microwave as described above in the spectacle lens manufacturing method.

An object of the present invention as described above, the mold processing for casting, polishing, using a gasket according to the desired degree of the mold obtained from the step of assembling the mold into the upper and lower molds and injecting the monomer (S10); Irradiating microwaves to the mold into which the monomers are injected and curing the first polymerized polymer (S20); Separating (releasing) the primary polymerized polymer to obtain a spectacle lens (S30); Trimming the edge of the spectacle lens and washing the surface (S40); It may be achieved by the method of manufacturing a spectacle lens using a microwave, characterized in that it comprises a; step (S50) and drying the spectacle lens after the step (S40) with a microwave.

Here, the curing of the step (S20, S50) is characterized in that it is made automatically by the transfer device for moving and discharging the mold or spectacle lens into the chamber and the chamber in which the microwave is generated.

In addition, another object of the present invention is a chamber having an opening on both sides and a fan on one side; Conveying device for moving and discharging the mold or the spectacle lens into the chamber, the interior of the chamber,

A microwave irradiation device provided with a plurality of spaced intervals in the moving direction of the transfer device; A temperature sensor provided on one side from the microwave irradiation device; A moisture detection sensor provided at one side of the transfer device to sense moisture of the first polymerized polymer or spectacle lens; A speed control device provided on one side of the transport device to adjust a transport speed of the transport device; And a control unit for controlling the speed adjusting device and the microwave irradiation device based on the signals of the temperature sensor and the moisture sensing sensor.

On the other hand, other features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention will be described in detail, in adding reference numerals to the components of each drawing, the same components are possible even if displayed on different drawings It should be noted that the same reference numerals are used. In describing the present invention, when it is determined that the detailed description of the related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The spectacle lens curing apparatus according to an embodiment of the present invention uses microwaves, and forms an opening 100a on both sides, and a chamber 100 having a fan 40 on one side and a mold into the chamber 100. Or it is composed of a transfer device for moving and discharging the spectacle lens (60).

In addition, the chamber 100 includes a transfer device, a microwave irradiation device 10, a temperature sensor 30, a moisture sensor 50, and a speed control device 22 therein, and an external control unit 70. Is provided.

Microwave irradiation apparatus 10 has a frequency bandwidth of 300MHz ~ 300,000MHz, a plurality of spaced apart at regular intervals in the moving direction of the transfer device on one side inside the chamber 100 for multi-stage irradiation. Here, the multi-stage standard means that the irradiation intensity is sequentially controlled by installing several microwave irradiation apparatuses 10. For example, the first microwave irradiation apparatus installed inside the chamber 100 may have a temperature of 35 ° C. and secondly. In the microwave irradiation device to be installed is irradiated at a temperature of 60 ℃, the third microwave irradiation device is to be irradiated at a temperature of 80 ℃.

Therefore, the number of installation of the microwave irradiation apparatus 10 may vary according to the size of the chamber 100, and may be sequentially irradiated by being set at a low temperature to a high temperature or a high temperature to a low temperature, and on the other hand, Irregularly set and irradiated. For example, the first temperature may be 35 ° C., the next temperature is 80 ° C., and the next temperature may be 60 ° C.

Since the conveying apparatus may be, for example, the conveyor 20, it will be described with reference to the conveyor 20. The conveyor 20 is configured inside the chamber 100, and both sides of the longitudinal direction are installed outwardly from the respective openings 100a to the outside of the chamber 100, and from one opening 100a to the other opening 100a. Having a movement path, the spectacle lens 60 is seated on the conveyor 20.

The conveyor 20 has a carrying capacity of rotation of the conveying means 21. The conveying means 21 may be belt type, may be of a chain type, and has a low dielectric constant material (Teflon) that does not undergo thermal reaction by microwaves. Teflon) is preferable.

In addition, a plurality of temperature sensors 30 paired with the microwave irradiation device 10 are provided on the moving path of the conveyor 20, and the conveyor 20 corresponding to the vertical direction of the microwave irradiation device 10 is provided. It may be provided on one side of the longitudinal direction, or may be provided on one side of the chamber 100 in the same longitudinal direction as the conveyor (20).

The temperature sensor 30 may be a non-contact IR temperature sensor capable of detecting the temperature of the surface of the object without directly contacting by detecting infrared radiation emitted from the object.

The moisture sensor 50 is provided to detect moisture on the surface of the spectacle lens 60 formed by separating the first polymerized polymer, and is installed on one side of the conveyor 20 or one side of the chamber 100. The moisture detection sensor 50 may be a sensor made of a principle of generating a signal if the frequency is different from the frequency based on the frequency of the surface of the spectacle lens 60 without moisture.

The speed control device 22 is provided to adjust the conveying speed of the conveyor 20. In FIG. 1, the speed adjusting device 22 is provided at one side of the conveyor 20 inside the chamber 100, but outside the chamber 100. It may be provided, the control of the transport speed is dependent on the signal generated from the moisture sensor 50 and the temperature sensor 30.

The control unit 70 is installed outside the chamber 100, and is connected to the temperature sensor 30, the moisture detection sensor 50, the microwave irradiation device 10, and the speed controller 22, and the temperature sensor 30. And a frequency range (300 MHz to 300,000 MHz) of the microwave irradiation device 10 according to the signal of the moisture detection sensor 50 and control the speed adjusting device 20 to control the conveying speed of the conveyor 20.

Meanwhile, at least one hot air inlet 201 and an exhaust port 202 may be provided at one side and the other side of the chamber 100, respectively. The hot air inlet 201 may be a heating device (not shown). Is a distribution path of hot air for supplying hot air (about 30 to 110 ° C.) generated in the chamber 100 to the inside of the chamber 100.

The exhaust port 202 is for discharging boil-off gas or dust generated inside the chamber 100 to the outside, and exhaust fan (not shown) on one side and the other side of the exhaust port 202 in order to exhaust the exhaust gas smoothly. ) May be further provided.

When applied to the manufacturing method of the spectacle lens using a curing device using a microwave configured as described above are as follows.

First, prior to applying the curing apparatus using microwave, assembling the mold into the upper and lower molds and injecting the monomer by using a gasket according to the desired degree of mold processing, polishing, and mold obtained therefrom for injection (S10). Is carried out.

In addition, the step of performing the curing of the monomer into the first polymer polymerized polymer through the curing apparatus using a microwave according to an embodiment of the present invention the monomer is injected (S20). The primary polymer polymer cured through the step (S20) is obtained through the process of separation (releasing work) to obtain a spectacle lens (S30), and trimming the edges of the thus obtained spectacle lens to clean the surface (S40) Going through.

After passing through the step S40, the spectacle lens is dried again using a curing apparatus using microwaves, and then subjected to post-curing (S50).

On the other hand, the step (S20, S50) preferably further comprises the step of supplying hot air of 30 ~ 110 ℃, which is a process speed only when the gas evaporated in the drying and curing process using the microwave is sufficiently discharged by convection This is because the temperature rises, and even if cold air is introduced, the hot air in the range of 30 to 110 ° C is necessary because it affects the temperature of the workpiece.

The manufacturing method of the spectacle lens as described above is a description of the essential steps of the present invention, omitting the known technology, and does not exclude the known technology. Therefore, hereinafter will be described briefly and clearly based on the essential steps of the present invention.

After assembling the mold into the upper mold and the lower mold, and injecting the monomer, the mold into which the monomer is injected is placed in the conveying means 21 of the conveyor 20. The process of being placed can be settled manually and in the case of automatic settling by automatic equipment. When the mold is placed on the transfer means 21, the transfer means 21 operates the motor (not shown) mounted on the conveyor 20. Will rotate.

The mold is moved to the inside of the chamber 100 by the rotation of the transfer means 21, it is cured by each of the microwave irradiation device 10 installed a plurality of spaced apart in the longitudinal direction inside the chamber 100 , Is discharged to the outside of the chamber 100.

The microwave irradiation is irradiated at a frequency selected in the range of 300MHz to 300,000MHz, for example, 2450MHz or 915MHz may be the center frequency.

On the other hand, in order for the curing of the monomer to be carried out smoothly, it must be irradiated in multiple stages from the microwave irradiation device 10 installed in a plurality of moving directions of the transfer means 21, wherein the irradiation intensity at this time is set to about to weak, or about to steel And, the moving speed of the conveying means 21 should be set according to the irradiation intensity of the microwave irradiation device 10.

The reason for irradiating at the center frequency of 2450 MHz or 915 MHz is that curing is performed without deformation of the monomer at the frequency.

On the other hand, the temperature sensor 30 paired with each microwave irradiation device 10 measures the temperature irradiated to the mold, the first installed temperature sensor 30 is a signal when the set value (for example 70 ℃) exceeds Is generated and applied to the control unit 70, and based on the signal, the control unit 70 controls the speed adjusting device 22 to slow down or accelerate the moving speed of the transfer means 21, and at the same time, the temperature sensor. The irradiation intensity of the microwave irradiation device 10 paired with 30 is varied.

In addition, this process corresponds to the entire temperature sensor 30 paired with the microwave irradiation device 10 irradiated in multiple stages in the chamber 100, the set value of each temperature sensor 30 (35 ~ 115 ℃) ) Can be varied arbitrarily. This is the same as disclosed in the configuration, the set value of the first installed temperature sensor from the inlet side of the chamber 100 is 35 ℃, the set value of the second installed temperature sensor is 60 ℃, the set value of the third installed temperature sensor is set to 85 ℃ By means of the operation of each temperature sensor 30 due to the various set values, the temperature sensor at any point is operated to apply a signal to the control unit 70, the speed of the transfer means 21 is reduced overall, Will be accelerated.

In addition, the microwave irradiation device 10 except for the microwave irradiation device 10 installed on top of the temperature sensor 30 operated in consideration of the curing of the monomer may not be smooth in this process, the operation or stop the irradiation intensity It can be adjusted, the speed control device 22 can also perform a stop operation following the acceleration, deceleration.

On the other hand, the mold entered into the chamber 100 is exposed to microwaves by the microwave irradiation device 10 provided in the chamber 100, if the material of the mold is microwave, the microwave can not penetrate to cure the monomer. Therefore, the material of the mold is preferably made of a glass material. The glass material is microwave permeable, which affects the various parts of the monomer, thereby achieving even curing of the monomer.

The above process may also be applied to the drying process and the post-curing process (S50), the post-curing process is as described above, the drying process is added to the operation of the moisture sensor (50). When the moisture is detected on the surface of the mold or spectacle lens 60 by the operation of the moisture sensor 50, the control unit 70 controls the speed adjusting device 22 and the microwave irradiation device 10 to reduce the transport speed. Or stop it and raise the irradiation intensity of the microwave irradiation apparatus 10. FIG.

On the other hand, the present invention can obtain a high quality spectacle lens by the manufacturing method of the spectacle lens as described above.

The method of manufacturing the spectacle lens using the microwave according to the present invention as described above and the spectacle lens obtained thereby have the effect of providing a uniform shaped spectacle lens, that is, a high quality spectacle lens, and shortens the curing time of the spectacle lens Since it has an effect that contributes to improve the productivity of the spectacle lens thereby.

In addition, the curing process of the spectacle lens using a microwave can overcome the disadvantage that was easy to occur in the conventional hot air curing method. In addition, it is possible to achieve hardening from the inside instead of hardening from the outside as in the hot air method, so there is enough space for the vapor to escape from the inside, and for this reason, it is possible to speed up the curing time and shorten the curing time. As a result, the life of the glass mold is extended at the same time.

In addition, when the hot air is irradiated at the same time as the microwave drying process, the effect of increasing the drying efficiency is further increased.

In addition, the response characteristics according to the microwave electric control method is excellent, easy to control and drying in a short time is excellent energy saving effect compared to the existing process. In addition, continuous hardening using a conveyor can reduce labor costs and at the same time save labor costs.

In addition, due to the continuous process there is an advantage that can be inspected and judged in real time the defects occurring during the curing process of the glasses material can reduce the failure rate compared to the hot air drying method.

Although the present invention has been described in connection with a preferred embodiment, those of ordinary skill in the art will be able to easily make various changes and modifications without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation, and the true scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope are included in the present invention. Should be interpreted as.

Claims (13)

Assembling the mold into upper and lower molds and injecting monomers using gaskets according to the desired tap water for mold processing, polishing, and molds obtained therefrom; Irradiating microwaves to the mold into which the monomers are injected and curing the first polymerized polymer (S20); Separating (releasing) the primary polymerized polymer to obtain a spectacle lens (S30); Trimming the edge of the spectacle lens and washing the surface (S40); Drying the spectacle lens through the step (S40) with microwave and at the same time, post-curing (S50); Method for producing a spectacle lens using a microwave, characterized in that comprises a. The method of claim 1, The microwave irradiation of the step (S20) is a method of manufacturing a spectacle lens using a microwave, characterized in that made of a frequency selected from the microwave having a frequency bandwidth of 300MHz ~ 300,000MHz. The method of claim 2, The microwave irradiation of the step (S20) is a method of manufacturing a spectacle lens using a microwave, characterized in that consisting of a center frequency of 2450MHz or 915MHz. The method of claim 1, The step (S20, S50) is a method of manufacturing a spectacle lens using a microwave, characterized in that further comprising the step of supplying hot air having a temperature of 30 ~ 110 ℃. The method of claim 1, The curing of the step (S20, S50) is a microwave, characterized in that automatically made by the chamber 100 is irradiated with microwave and the transfer device for moving and ejecting the mold or spectacle lens 60 into the chamber 100; Method of manufacturing a spectacle lens using. The method of claim 5, wherein the interior of the chamber 100, Microwave irradiation apparatus 10 is provided with a plurality of spaced apart at regular intervals in the movement direction of the transfer device; A temperature sensor 30 provided at one side from the plurality of microwave irradiation devices 10; A moisture detection sensor 50 provided at one side of the transfer device to sense moisture of the first polymerized polymer or spectacle lens; A speed adjusting device (22) provided at one side of the transporting device to adjust a transport speed of the transporting device; And A control unit controlling the speed adjusting device 22 and the microwave irradiation device 10 based on the signals of the temperature sensor 30 and the moisture detection sensor 50; Method for producing a spectacle lens using a microwave, characterized in that comprises a. Spectacle lens, characterized in that produced by the manufacturing method of any one of claims 1 to 6. A chamber 100 having openings 100a formed at both sides and having a fan 40 at one side thereof; Conveying device for moving and discharging the mold or spectacle lens 60 into the chamber 100; wherein the interior of the chamber 100, Microwave irradiation apparatus 10 is provided with a plurality of spaced apart at regular intervals in the movement direction of the transfer device; A temperature sensor 30 provided at one side from the plurality of microwave irradiation devices 10; A moisture detection sensor 50 provided at one side of the transfer device to sense moisture of the first polymerized polymer or spectacle lens 60; A speed adjusting device (22) provided at one side of the transporting device to adjust a transport speed of the transporting device; And A control unit 70 for controlling the speed adjusting device 22 and the microwave irradiation device 10 based on the signals of the temperature sensor 30 and the moisture detection sensor 50; Glasses lens curing apparatus using a microwave, characterized in that comprises a. The method of claim 8, At least one hot air inlet 201 and an exhaust port 202 are provided at one side and the other side of the chamber 100, respectively. The method of claim 8, The microwave irradiation device 10 is a spectacle lens curing device using a microwave, characterized in that for irradiating at a frequency selected from among microwaves having a frequency bandwidth of 300MHz ~ 300,000MHz. The method of claim 10, The selected frequency is 2450MHz or 915MHz, the eyeglass lens curing device using a microwave, characterized in that the center frequency. The method of claim 8, The conveying apparatus is a spectacle lens curing apparatus using a microwave, characterized in that the conveyor 20 is provided with a conveying means (21). The method of claim 12, The conveying means (21) is a spectacle lens curing apparatus using a microwave, characterized in that made of a low dielectric constant material does not cause thermal reactions by microwaves.

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