CN114632678A - Hardening method of PC spectacle lens - Google Patents
Hardening method of PC spectacle lens Download PDFInfo
- Publication number
- CN114632678A CN114632678A CN202210310511.8A CN202210310511A CN114632678A CN 114632678 A CN114632678 A CN 114632678A CN 202210310511 A CN202210310511 A CN 202210310511A CN 114632678 A CN114632678 A CN 114632678A
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- Prior art keywords
- lens
- liquid
- hardening
- lens substrate
- substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
Abstract
The invention relates to the field of spectacle lenses, and particularly discloses a hardening method of a PC spectacle lens, which comprises the following steps: s1 cleaning and washing the lens substrate; s2 putting the lens substrate into the precoating liquid, and then transferring into the hardening liquid; s3, slowly lifting the lens substrate, starting an ultrasonic generator to excite the hardening liquid after most of the lens substrate is separated from the liquid level, simultaneously slowing the lifting speed, and closing the ultrasonic generator after the lens substrate is separated from the liquid level; s4 finally cures. The hardening liquid has high solid content, most of the hardening liquid is easy to adhere to the tail end of the lens substrate, and after most of the lens substrate is separated from the liquid level, the liquid adhered to the bottom of the lens substrate can be reduced through the excitation of the ultrasonic generator, so that the liquid film at the bottom is properly reduced. After subsequent solidification, the hardened film thickness errors of the upper side and the lower side of the lens substrate are small, and the mirror surface is smoother.
Description
Technical Field
The invention belongs to the field of spectacle lens manufacturing, and particularly relates to a hardening method of a PC spectacle lens.
Background
The glass lens has excellent optical performance and good light transmittance. However, glass eyeglass lenses have been replaced by resin lenses due to their disadvantages of brittleness, scratch resistance, and weight, and the resin lenses have become the mainstream in the market. The PC lens has the advantages of easy dyeing, impact resistance, good chemical stability and the like. However, the PC material has the disadvantages that the surface hardness is low, and the lens substrate is easily scratched or abraded, so that the PC material cannot be directly used. The current solution is to increase the surface hardness of the lens substrate by immersing the lens substrate in a hardening liquid and applying a hardening layer to the surface of the lens through a curing process. In addition, in order to provide other functions to the PC lens, it is necessary to further deposit a plating layer having some functions, for example, a plating layer having ultraviolet ray, radiation, static electricity, and the like.
When the lens substrate is pulled out of the hardening liquid, a problem arises in that the solution above the lens substrate is slightly thinner than the solution below the lens substrate because the liquid is affected by gravity. The final hardened layer is not uniform enough above and below. The prior art teaches optimizing the draw process to slowly draw the lens substrate out of the hardening liquid. There is room for improvement in the prior art.
The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.
Disclosure of Invention
The invention aims to provide a hardening method of a PC spectacle lens, which enables the thickness of a plated film to be more uniform.
To achieve the above object, the present invention provides a method for hardening a PC spectacle lens, comprising the steps of:
s1, preparing the lens substrate, injection-molding the corresponding lens substrate according to the design requirement and trimming, including polishing. Preparing a hanging rack, and then placing the lens substrate on the hanging rack, wherein when the hanging rack is connected with the lens substrate, the lens substrate is vertically placed; the transfer of the lens substrate, referred to below, may be understood as a robotic transfer rack. And (3) putting a plurality of lens substrates into deionized water for ultrasonic cleaning, generally cleaning for 2 minutes, and then putting the cleaned lens substrates into a drying oven for drying. In the above scheme, a continuous production line is arranged, the front end of the production line is provided with a plurality of ultrasonic cleaning tanks, the rear end of the production line is provided with a drying box, and the production line continuously drives the lens substrate to move and dip into the ultrasonic cleaning tanks through a conveying belt and a lifting clamp. In a production plant, it is necessary to maintain a dust-free environment.
S2, the cleaned lens substrate is transferred into a precoating liquid to be soaked, the precoating liquid is a mixed liquid of Crystal Coat PR-550 and diluent Crystal Coat SM-1250, the volume ratio is 4/6-6/4, the specific gravity is 0.82-0.9, and the solid content of the precoating liquid is 10-20%. By adopting the scheme, the precoating liquid has the function similar to viscose, so that the lens substrate can be more stably adsorbed in the next procedure (hardening procedure). And drying the lifted lens substrate properly and transferring to the next process.
S3, pulling the lens substrates in the step S2 out, transferring and immersing the lens substrates in hardening liquid containing organic silicon, then slowly pulling a plurality of lens substrates, starting exciting the hardening liquid by using an ultrasonic generator when the upper half parts of the lens substrates leave the liquid surface, simultaneously slowing down the pulling speed, and stopping the ultrasonic generator when the lens substrates are separated from the liquid surface. When the lens substrate rises, the hardening liquid can be deposited below due to the influence of gravity, namely, the liquid level below the hardening liquid is slightly thicker in a natural state. In the scheme, the characteristic that ultrasonic vibration can cavitate liquid is utilized, the viscosity of the hardening liquid is reduced, the adhesive force of the hardening liquid is reduced in the process that the lower side of the lens substrate is slowly separated from the hardening liquid, so that a bottom liquid film of the lens substrate is not too thick, and the thickness difference of the liquid films on the upper side and the lower side of the lens substrate is finally reduced. Generally, the thickness of the hardened layer is 1-5 μm, and the difference between the upper and lower thicknesses of the liquid film pulled by the traditional method is generally 0.02-0.08 μm; after the process is adopted, the difference of the upper thickness and the lower thickness can be reduced by one order of magnitude and is 0.002-0.008 mu m.
S4, after the hardening liquid is pulled out from a plurality of lens substrates, drying the lens substrates for 2 to 4 hours at the temperature of between 70 and 90 ℃, conveying the lens substrates into a drying machine for drying and curing, wherein the curing dimension is 100-120 ℃, and the curing time is 2 to 4 hours, and finally obtaining the hardened lens substrates. On the basis, the lens substrate is evaporated with a coating film with other functions.
The ion plating method is the prior art, and the basic steps and the principle are as follows. Will treat the coating film work piece (the lens that this application provided promptly) and arrange the vacuum coating cavity in, control vacuum coating cavity reaches certain vacuum, restart the ion source, carry out the ion bombardment to the substrate surface, reach the effect of cleaning and activation substrate surface energy, then start the electron gun, the electron gun produces high temperature electron beam, high temperature electron beam scans the bombardment coating material, the coating by vaporization material promptly for the coating by vaporization material melts, deposit in the surface of treating the coating film work piece behind the coating by vaporization material, so just accomplish the coating by vaporization shaping of rete.
As a modification of the above scheme, in the step S3, the excitation frequency of the ultrasonic generator is 40-68 KHz. According to the controlled variable method, in the case where only the excitation frequency is changed, the higher the frequency is, the harder the hardening liquid is adhered to the lens substrate, and the thinner the thickness of the bottom portion becomes. However, too high a frequency may affect the adhesion of the hardening liquid to the lens substrate, which is disadvantageous for the formation of the hardened layer. Therefore, it is desirable to select the amount within the above range.
As a modification of the above, in step S3, the ultrasonic generator is activated when 3/5-3/4 of the lens substrate is exposed to the liquid surface.
As an improvement of the scheme, in the step S3, when 3/5-3/4 of the lens substrate exposes the liquid surface, the pulling speed is reduced to 0.7-1.1mm/S and is kept at a constant speed. The cooperation slows down the pulling speed, can make liquid film thickness even, can avoid producing the rainbow line like this.
As a modification of the above solution, in step S3, when the lens substrate is completely separated from the liquid surface, the pulling speed is increased to 1.2-1.5mm/S and kept at a constant speed until the lens substrate reaches the designated height.
As an improvement of the scheme, the soaking time in the step S2 is 4-5min, and the soaking temperature is 15-18 ℃.
As an improvement of the scheme, the soaking time in the step S3 is 5-10S, and the soaking temperature is 15-20 ℃.
Compared with the prior art, the invention has the following beneficial effects: the hardening liquid has high solid content, most of the hardening liquid is easy to adhere to the tail end of the lens substrate, and after most of the lens substrate is separated from the liquid level, the liquid adhered to the bottom of the lens substrate can be reduced through the excitation of the ultrasonic generator, so that the liquid film at the bottom is properly reduced. After subsequent solidification, the hardened film thickness errors of the upper side and the lower side of the lens substrate are small, and the mirror surface is smoother.
Detailed Description
In the description of the present invention, it should be noted that the terms "central", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations and positional relationships only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. The terms "first", "second" and "third", if any, are used for descriptive purposes only and for distinguishing between technical features and are not to be construed as indicating or implying relative importance or implying a number of indicated technical features or a precedence of indicated technical features.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 a specific case to those of ordinary skill in the art. The following describes an embodiment of the present invention based on its overall structure.
The invention discloses a hardening method of a PC spectacle lens, which comprises the following steps:
s5, preparing a lens substrate, performing injection molding according to design requirements to manufacture the corresponding lens substrate, and performing trimming, including polishing treatment. Preparing a hanging rack, and then placing the lens substrate on the hanging rack, wherein when the hanging rack is connected with the lens substrate, the lens substrate is vertically placed; the transfer of the lens substrate, referred to below, may be understood as a robotic transfer rack. And (3) putting a plurality of lens substrates into deionized water for ultrasonic cleaning, generally cleaning for 2 minutes, and then putting the cleaned lens substrates into a drying oven for drying. In the above scheme, a continuous production line is arranged, the front end of the production line is provided with a plurality of ultrasonic cleaning tanks, the rear end of the production line is provided with a drying box, and the production line continuously drives the lens substrate to move and dip into the ultrasonic cleaning tanks through a conveying belt and a lifting clamp. In a production plant, it is necessary to maintain a dust-free environment.
S6, the cleaned lens substrate is transferred into a precoating liquid to be soaked, the precoating liquid is a mixed liquid of Crystal Coat PR-550 and diluent Crystal Coat SM-1250, the volume ratio is 4/6-6/4, the specific gravity is 0.82-0.9, and the solid content of the precoating liquid is 10-20%. By adopting the scheme, the precoating liquid has the function similar to viscose, so that the lens substrate can be more stably adsorbed in the next procedure (hardening procedure). And drying the lifted lens substrate properly and transferring to the next process.
S7, pulling the lens substrates in the step S2 out, transferring and immersing the lens substrates in hardening liquid containing organic silicon, slowly pulling a plurality of lens substrates, starting to use an ultrasonic generator to excite the hardening liquid when the upper half parts of the lens substrates leave the liquid level, simultaneously slowing down the pulling speed, and stopping the ultrasonic generator when the lens substrates are separated from the liquid level. When the lens substrate rises, the hardening liquid can be deposited below due to the influence of gravity, namely, the liquid level below the hardening liquid is slightly thicker in a natural state. In the scheme, the characteristic that ultrasonic vibration can cavitate liquid is utilized, the viscosity of the hardening liquid is reduced, the adhesive force of the hardening liquid is reduced in the process that the lower side of the lens substrate is slowly separated from the hardening liquid, so that a bottom liquid film of the lens substrate is not too thick, and the thickness difference of liquid films on the upper side and the lower side of the lens substrate is finally reduced. Generally, the thickness of the hardened layer is 1-5 μm, and the difference between the upper and lower thicknesses of the liquid film pulled by the traditional method is generally 0.02-0.08 μm; after the process is adopted, the difference of the upper thickness and the lower thickness can be reduced by one order of magnitude and is 0.002-0.008 mu m.
S8, after the hardening liquid is pulled out from a plurality of lens substrates, drying the lens substrates for 2 to 4 hours at the temperature of between 70 and 90 ℃, conveying the lens substrates into a drying machine for drying and curing, wherein the curing dimension is 100-120 ℃, and the curing time is 2 to 4 hours, and finally obtaining the hardened lens substrates. On the basis, the lens substrate is coated with a film with other functions by evaporation.
The ion plating method is the prior art, and the basic steps and the principle are as follows. Will treat that the coating film work piece (the lens that this application provided promptly) arranges in the vacuum coating cavity in, control vacuum coating cavity reaches certain vacuum, restart the ion source, carry out the ion bombardment to the substrate surface, reach the effect clean and activate substrate surface energy, then start the electron gun, the electron gun produces high-temperature electron beam, high-temperature electron beam scanning bombardment coating material, the coating film material of evaporating plating promptly for the coating film material melts the evaporation, deposit in the surface of waiting to plate the work piece behind the coating film material of evaporating plating, so just accomplish the coating by vaporization shaping of rete.
As a modification of the above scheme, in the step S3, the excitation frequency of the ultrasonic generator is 40-68 KHz. According to the controlled variable method, in the case where only the excitation frequency is changed, the higher the frequency is, the harder the hardening liquid is adhered to the lens substrate, and the thinner the thickness of the bottom portion becomes. However, too high a frequency may affect the adhesion of the hardening liquid to the lens substrate, which is disadvantageous for the formation of the hardened layer. And therefore, it is desirable to select the content within the above range.
As a modification of the above, in step S3, the ultrasonic generator is activated when 3/5-3/4 of the lens substrate is exposed to the liquid surface.
As an improvement of the scheme, in the step S3, when 3/5-3/4 of the lens substrate is exposed out of the liquid surface, the pulling speed is reduced to 0.7-1.1mm/S and is kept at a constant speed. The cooperation slows down the pulling speed, can make liquid film thickness even, can avoid producing the rainbow line like this.
As a modification of the above solution, in step S3, when the lens substrate is completely separated from the liquid surface, the pulling speed is increased to 1.2-1.5mm/S and kept at a constant speed until the lens substrate reaches the designated height.
As an improvement of the scheme, the soaking time in the step S2 is 4-5min, and the soaking temperature is 15-18 ℃.
As an improvement of the scheme, the soaking time in the step S3 is 5-10S, and the soaking temperature is 15-20 ℃.
The foregoing description of specific exemplary embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (7)
1. A method of hardening a PC ophthalmic lens comprising the steps of:
s1, performing injection molding to process corresponding lens substrates according to design requirements, trimming, putting the lens substrates into corresponding hangers in order, firstly putting the lens substrates into deionized water for ultrasonic cleaning, and then transferring into a drying oven for drying;
s2, soaking the cleaned lens substrate into a precoating liquid, wherein the precoating liquid is a mixed liquid of Crystal Coat PR-550 and diluent Crystal Coat SM-1250, the volume ratio is 4/6-6/4, the specific gravity is 0.82-0.9, and the solid content of the precoating liquid is 10-20%;
s3, pulling out the lens substrates in the step S2, transferring and immersing the lens substrates in hardening liquid containing organic silicon, slowly pulling a plurality of lens substrates, exciting the hardening liquid by using an ultrasonic generator when the upper half parts of the lens substrates are away from the liquid surface, slowing down the pulling speed, and stopping the ultrasonic generator when the lens substrates are away from the liquid surface;
s4, after pulling out the hardening liquid, drying the lens substrates for 2 to 4 hours at the temperature of between 70 and 90 ℃, conveying the lens substrates into a dryer for drying and curing, wherein the curing dimension is 100-120 ℃, and the curing time is 2 to 4 hours, and finally obtaining the hardened lens substrates.
2. A method of hardening a PC ophthalmic lens as defined in claim 1, wherein: in the step S3, the excitation frequency of the ultrasonic generator is 40 to 68 KHz.
3. A method of hardening a PC ophthalmic lens as defined in claim 2, wherein: in step S3, the ultrasonic generator is activated when the 3/5-3/4 of the lens substrate is exposed to the liquid surface.
4. The method of claim 4 for hardening a PC ophthalmic lens, wherein: in step S3, when 3/5-3/4 of the lens substrate is exposed out of the liquid surface, the pulling speed is reduced to 0.7-1.1mm/S and kept constant.
5. The method of claim 5 for hardening a PC ophthalmic lens, wherein: in step S3, when the lens substrate is completely separated from the liquid surface, the pulling speed is increased to 1.2-1.5mm/S and kept at a constant speed until the lens substrate reaches the designated height.
6. The method of claim 6 for hardening a PC ophthalmic lens, wherein: the soaking time in the step S2 is 4-5min, and the soaking temperature is 15-18 ℃.
7. The method of hardening a PC spectacle lens as defined in claim 7, wherein: the infiltration time in the step S3 is 5-10S, and the infiltration temperature is 15-20 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210310511.8A CN114632678A (en) | 2022-03-28 | 2022-03-28 | Hardening method of PC spectacle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210310511.8A CN114632678A (en) | 2022-03-28 | 2022-03-28 | Hardening method of PC spectacle lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114632678A true CN114632678A (en) | 2022-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210310511.8A Pending CN114632678A (en) | 2022-03-28 | 2022-03-28 | Hardening method of PC spectacle lens |
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| CN (1) | CN114632678A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06175089A (en) * | 1992-12-07 | 1994-06-24 | Ito Kogaku Kogyo Kk | Stainproof treatment of plastic lens |
| JP2013190712A (en) * | 2012-03-15 | 2013-09-26 | Hoya Corp | Manufacturing method of optical lens |
| CN110286426A (en) * | 2019-05-13 | 2019-09-27 | 江苏新唯尊光学眼镜有限公司 | A kind of process for immersing of color-changing lens |
-
2022
- 2022-03-28 CN CN202210310511.8A patent/CN114632678A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06175089A (en) * | 1992-12-07 | 1994-06-24 | Ito Kogaku Kogyo Kk | Stainproof treatment of plastic lens |
| JP2013190712A (en) * | 2012-03-15 | 2013-09-26 | Hoya Corp | Manufacturing method of optical lens |
| CN110286426A (en) * | 2019-05-13 | 2019-09-27 | 江苏新唯尊光学眼镜有限公司 | A kind of process for immersing of color-changing lens |
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