CN110802855A - Lens production process - Google Patents
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- CN110802855A CN110802855A CN201810880484.1A CN201810880484A CN110802855A CN 110802855 A CN110802855 A CN 110802855A CN 201810880484 A CN201810880484 A CN 201810880484A CN 110802855 A CN110802855 A CN 110802855A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00278—Lenticular sheets
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
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- Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
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- Optics & Photonics (AREA)
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Abstract
The invention discloses a lens production process, which specifically comprises eight steps of raw material preparation, mold preparation, injection molding, semi-finished product grinding, semi-finished product cleaning, coating treatment and finished product testing, so that the quality of a lens can be ensured, and the lens production efficiency can be improved. The lens manufactured by the production process disclosed by the invention has the advantages of good impact resistance, light weight, capability of absorbing all ultraviolet rays and improving the comfort of a wearer, high wear resistance and good dirt resistance, and overcomes the defects of the conventional PC lens.
Description
Technical Field
The invention relates to the technical field of lenses, in particular to a lens production process.
Background
The chemical name of the PC lens is polycarbonate, which is an environment-friendly engineering plastic. The PC lens has the characteristics of beauty, health, safety, environmental protection and the like. Because of such many advantages, manufacturers all over the world have looked great at the development prospect of the PC lenses, and continuously adopt new processes and new technologies in the aspects of design, manufacture and research of the lenses, and with the change of science and technology, high-tech, multifunctional and multipurpose PC lenses are continuously released, so that the comprehensive needs of physiology, protection and decoration of consumers are met. The PC lens has become one of the leading lens products in the market, but the PC lens still has the defects of poor wear resistance, easy scratch on the surface of the lens and the like, so that each process needs to be accurately grasped in the production of the PC lens, thereby solving the existing defects, other inherent quality problems and low production efficiency.
Disclosure of Invention
The invention provides a lens production process which enables the lens to have good wear resistance and high quality.
The technical scheme adopted by the invention for solving the technical problems is as follows: a lens production process comprising the steps of:
(1) preparing raw materials: selecting polycarbonate, and drying and cooling the polycarbonate;
(2) preparing a mould: cleaning and drying the glass mold, and then preheating the glass mold;
(3) injection molding: adding polycarbonate into an injection molding machine, heating and melting the polycarbonate, then injecting the melted polycarbonate into a glass mold, and then cooling and molding the glass mold to obtain a semi-finished product of the lens;
(4) grinding a semi-finished product: grinding the semi-finished product, wherein the grinding process mainly comprises edging and chamfering;
(5) cleaning a semi-finished product: cleaning the ground semi-finished product for more than six times;
(6) drying the semi-finished product: drying the cleaned semi-finished product by using a dryer;
(7) coating treatment: performing film coating treatment on the semi-finished product after drying, wherein the film coating is a composite film, the composite film sequentially comprises a hard film, a reflection reducing film and a top film from inside to outside, and a finished product of the lens can be formed after the film coating is finished;
(8) and (3) testing a finished product: firstly, the adhesion of the finished product is inspected, and various defective lenses are removed according to the inspection result.
Further, the drying temperature of the polycarbonate in the step (1) is 120-130 ℃, the drying time is 4-8 hours, and the water content of the dried polycarbonate is less than 0.02%.
Further, the preheating temperature of the glass mold in the step (2) is kept between 95 and 105 ℃.
Further, in the step (3), the heating temperature of the injection molding machine is 260-300 ℃.
Further, the concrete method for edging in the step (4) is as follows:
firstly, attaching protective gummed paper to the surface of a lens, fixing the lens by using a sucking disc, and then performing coarse grinding and fine grinding by using an edge grinding machine;
the chamfering in the step (4) is to chamfer a slight bevel at 45 ℃ at each side of the lens.
Further, the specific cleaning step of the semi-finished product in the step (5) comprises:
cleaning in the first step: adding an organic solvent cleaning agent into a cleaning solution by using an ultrasonic cleaning machine, wherein the temperature of the cleaning solution is 50-60 ℃, the frequency of ultrasonic waves is 28-40 kHz, and the cleaning time is 60-100 s;
and a second step of cleaning: washing with pure water, wherein the temperature of the pure water is 45-55 ℃, and the washing time is 60-100 s;
and a third step of cleaning: adding a water-based cleaning agent into the cleaning liquid by using an ultrasonic cleaning machine, wherein the temperature of the cleaning liquid is 50-60 ℃, the frequency of ultrasonic waves is 30-40 kHz, and the cleaning time is 60-100 s;
and fourthly, cleaning: washing with pure water, wherein the temperature of the pure water is 60-75 ℃, and the washing time is 60-100 s;
and after the fourth step, cleaning uniformly, wherein the cleaning method in the fourth step is the same.
Further, the drying temperature in the step (6) is 65-75 ℃.
Further, in the step (7), the hard film is a wear-resistant film, and the film coating method is a dipping method, and comprises the following specific steps:
and (3) immersing the lens into the hardening liquid, keeping the temperature for 80s, then taking out the lens, polymerizing the lens in an oven at the temperature of 95-105 ℃ for 4-5 h after taking out the lens, repeating the method twice, and finishing the hard film coating, wherein the thickness of the hard film is 3000-5000 nm.
Further, the anti-reflection film in the step (7) is formed by a vacuum coating method, and the method comprises the following specific steps:
the method comprises the following steps of firstly carrying out pre-cleaning before film coating, cleaning by using an ultrasonic cleaning machine after cleaning a lens, putting the lens into a vacuum chamber, carrying out final cleaning before plating in the vacuum chamber, bombarding the surface of the lens by using an ion gun placed in the vacuum chamber, and carrying out film coating on an antireflection film after the cleaning process is finished, wherein the thickness of the antireflection film is 300-400 nm;
further, the top film in the step (7) is an antifouling film, and the adopted film coating method is a vacuum film coating method or a soaking method;
the thickness of the antifouling film is 50-100 nm.
By adopting the materials and the method, the lens production process provided by the invention not only can ensure the quality of the lens, but also can improve the production efficiency of the lens. The lens manufactured by the production process disclosed by the invention has the advantages of good impact resistance, light weight, capability of absorbing all ultraviolet rays and improving the comfort of a wearer, high wear resistance and good dirt resistance, and overcomes the defects of the conventional PC lens.
Detailed Description
In order that the contents of the present invention may be more clearly understood, the lens manufacturing process of the present invention will be described in further detail below with reference to specific examples.
The first embodiment is as follows:
a lens production process comprising the steps of:
(1) preparing raw materials: selecting polycarbonate, and drying and cooling the polycarbonate;
wherein the drying temperature of the polycarbonate is 120 ℃, the drying time is 4h, and the water content of the dried polycarbonate is less than 0.02%.
Some bad dryness of polycarbonate can cause degradation in the lens production process, molecular weight reduction, and lens discoloration and brittleness, thereby affecting the quality of the lens.
(2) Preparing a mould: cleaning and drying the glass mold, and then preheating the glass mold;
wherein the preheating temperature of the glass mold is kept between 95 ℃.
The glass mold is cleaned and dried, so that the influence of impurities attached to the interior of the mold on the quality of a lens is prevented, the mold is heated, the flowability of polycarbonate in the interior of the glass mold can be ensured in the injection molding process, and the polycarbonate can be filled in the whole glass mold.
(3) Injection molding: adding polycarbonate into an injection molding machine, heating and melting the polycarbonate, then injecting the melted polycarbonate into a glass mold, and then cooling and molding the glass mold to obtain a semi-finished product of the lens;
wherein the heating temperature of the injection molding machine is 260 ℃.
This temperature ensures complete melting of the polycarbonate without deterioration.
(4) Grinding a semi-finished product: grinding the semi-finished product, wherein the grinding process mainly comprises edging and chamfering;
the concrete method of edging is:
firstly, attaching protective gummed paper to the surface of a lens, fixing the lens by using a sucking disc, and then performing coarse grinding and fine grinding by using an edge grinding machine;
the protective gummed paper prevents the surface of the lens from being abraded, and the quality of the lens is influenced.
While chamfering is a slight bevel of 45 c on each side of the lens.
The chamfer is mainly for getting rid of the burr that the lens surface produced in the process of moulding plastics, increases the smoothness on lens surface to the chamfer can be convenient for the installation of lens and picture frame.
(5) Cleaning a semi-finished product: cleaning the ground semi-finished product for more than six times;
wherein, the specific cleaning step of the semi-finished product comprises the following steps:
cleaning in the first step: adding an organic solvent cleaning agent into a cleaning solution by using an ultrasonic cleaning machine, wherein the temperature of the cleaning solution is 50 ℃, the frequency of ultrasonic waves is 28kHz, and the cleaning time is 60 s;
and a second step of cleaning: washing with pure water at 45 deg.C for 60 s;
and a third step of cleaning: adding a water-based cleaning agent into the cleaning liquid by using an ultrasonic cleaning machine, wherein the temperature of the cleaning liquid is 50 ℃, the ultrasonic frequency is 30kHz, and the cleaning time is 60 s;
and fourthly, cleaning: washing with pure water at 60 deg.C for 60 s;
and after the fourth step, cleaning uniformly, wherein the cleaning method in the fourth step is the same.
The cleaning steps can ensure the cleanliness of the surface of the lens and improve the quality of the lens.
(6) Drying the semi-finished product: drying the cleaned semi-finished product by using a dryer;
wherein the drying temperature is 65 ℃.
(7) Coating treatment: performing film coating treatment on the semi-finished product after drying, wherein the film coating is a composite film, the composite film sequentially comprises a hard film, a reflection reducing film and a top film from inside to outside, and a finished product of the lens can be formed after the film coating is finished;
wherein, the hard film is a wear-resistant film, the film coating method is a soaking method, and the specific steps are as follows:
and (3) immersing the lens into the hardening liquid, keeping the temperature for 80s, then taking out the lens, polymerizing the lens for 4h in an oven at the temperature of 95 ℃ after taking out the lens, repeating the method twice, and finishing the hard film coating, wherein the thickness of the hard film is 3000 nm.
The hard film can increase the wear resistance of the lens and prolong the service life of the lens.
The anti-reflection film is formed by adopting a vacuum coating method, and the method comprises the following specific steps:
the lens is firstly pre-cleaned before coating, an ultrasonic cleaning machine is used for cleaning the lens, the lens is placed in a vacuum chamber after being cleaned, and special attention needs to be paid to the process of avoiding dust and garbage in the air from being adhered to the surface of the lens again. The final cleaning is carried out before plating in the vacuum chamber, an ion gun placed in the vacuum chamber bombards the surface of the lens, and after the cleaning procedure is finished, the plating of the antireflection film is carried out, wherein the thickness of the antireflection film is 300 nm;
specifically, argon ions can be bombed by the ion gun, the vacuum evaporation process can ensure that pure coating materials are plated on the surface of the lens, and the chemical components of the coating materials can be strictly controlled in the evaporation process. The vacuum evaporation process can accurately control the thickness of the film layer, and the precision is achieved.
For the spectacle lens, the firmness of the film layer is crucial and is an important quality index of the lens. The quality indexes of the lens comprise wear resistance, cultural center resistance, temperature difference resistance and the like. Therefore, there are many targeted physicochemical testing methods for testing the film fastness quality of coated lenses under conditions simulating the use of the wearer. These test methods include: a salt water test, a steam test, a deionized water test, a steel wool friction test, a dissolution test, an adhesion test, a temperature difference test, a humidity test, and the like.
The top film is an antifouling film, and the adopted film coating method is a vacuum film coating method or a soaking method;
the thickness of the antifouling film is 50 nm.
The anti-fouling film can increase the oil stain resistance and water resistance of the lens.
(8) And (3) testing a finished product: firstly, the adhesion of the finished product is checked, and various defective lenses are removed according to the checking result, wherein the defective rate is 3.1%.
After the hard film coating is finished, frosted or steel wool is adopted for testing, and the conclusion is drawn that the wear resistance of the surface lens is high, and the friction haze value is 0.30 Hs.
Example two:
a lens production process comprising the steps of:
(1) preparing raw materials: selecting polycarbonate, and drying and cooling the polycarbonate;
wherein the drying temperature of the polycarbonate is 130 ℃, the drying time is 8h, and the water content of the dried polycarbonate is less than 0.02%.
Some bad dryness of polycarbonate can cause degradation in the lens production process, molecular weight reduction, and lens discoloration and brittleness, thereby affecting the quality of the lens.
(2) Preparing a mould: cleaning and drying the glass mold, and then preheating the glass mold;
wherein the preheating temperature of the glass mold is maintained between 105 ℃.
The glass mold is cleaned and dried, so that the influence of impurities attached to the interior of the mold on the quality of a lens is prevented, the mold is heated, the flowability of polycarbonate in the interior of the glass mold can be ensured in the injection molding process, and the polycarbonate can be filled in the whole glass mold.
(3) Injection molding: adding polycarbonate into an injection molding machine, heating and melting the polycarbonate, then injecting the melted polycarbonate into a glass mold, and then cooling and molding the glass mold to obtain a semi-finished product of the lens;
wherein the heating temperature of the injection molding machine is 300 ℃.
This temperature ensures complete melting of the polycarbonate without deterioration.
(4) Grinding a semi-finished product: grinding the semi-finished product, wherein the grinding process mainly comprises edging and chamfering;
the concrete method of edging is:
firstly, attaching protective gummed paper to the surface of a lens, fixing the lens by using a sucking disc, and then performing coarse grinding and fine grinding by using an edge grinding machine;
the protective gummed paper prevents the surface of the lens from being abraded, and the quality of the lens is influenced.
While chamfering is a slight bevel of 45 c on each side of the lens.
The chamfer is mainly for getting rid of the burr that the lens surface produced in the process of moulding plastics, increases the smoothness on lens surface to the chamfer can be convenient for the installation of lens and picture frame.
(5) Cleaning a semi-finished product: cleaning the ground semi-finished product for more than six times;
wherein, the specific cleaning step of the semi-finished product comprises the following steps:
cleaning in the first step: adding an organic solvent cleaning agent into a cleaning solution by using an ultrasonic cleaning machine, wherein the temperature of the cleaning solution is 60 ℃, the frequency of ultrasonic waves is 40kHz, and the cleaning time is 100 s;
and a second step of cleaning: washing with pure water at 55 deg.C for 100 s;
and a third step of cleaning: adding a water-based cleaning agent into the cleaning liquid by using an ultrasonic cleaning machine, wherein the temperature of the cleaning liquid is 60 ℃, the ultrasonic frequency is 40kHz, and the cleaning time is 100 s;
and fourthly, cleaning: washing with pure water at 75 deg.C for 100 s;
and after the fourth step, cleaning uniformly, wherein the cleaning method in the fourth step is the same.
The cleaning steps can ensure the cleanliness of the surface of the lens and improve the quality of the lens.
(6) Drying the semi-finished product: drying the cleaned semi-finished product by using a dryer;
wherein the drying temperature is 75 ℃.
(7) Coating treatment: performing film coating treatment on the semi-finished product after drying, wherein the film coating is a composite film, the composite film sequentially comprises a hard film, a reflection reducing film and a top film from inside to outside, and a finished product of the lens can be formed after the film coating is finished;
wherein, the hard film is a wear-resistant film, the film coating method is a soaking method, and the specific steps are as follows:
and (3) immersing the lens into the hardening liquid, keeping the temperature for 80s, then taking out the lens, polymerizing the lens for 5h in an oven at 105 ℃, and repeating the method twice to complete the hard film coating, wherein the thickness of the hard film is 5000 nm.
The hard film can increase the wear resistance of the lens and prolong the service life of the lens.
The anti-reflection film is formed by adopting a vacuum coating method, and the method comprises the following specific steps:
the lens is firstly pre-cleaned before coating, an ultrasonic cleaning machine is used for cleaning the lens, the lens is placed in a vacuum chamber after being cleaned, and special attention needs to be paid to the process of avoiding dust and garbage in the air from being adhered to the surface of the lens again. The final cleaning is carried out before plating in the vacuum chamber, an ion gun placed in the vacuum chamber bombards the surface of the lens, and after the cleaning procedure is finished, the plating of the antireflection film is carried out, wherein the thickness of the antireflection film is 400 nm;
specifically, argon ions can be bombed by the ion gun, the vacuum evaporation process can ensure that pure coating materials are plated on the surface of the lens, and the chemical components of the coating materials can be strictly controlled in the evaporation process. The vacuum evaporation process can accurately control the thickness of the film layer, and the precision is achieved.
For the spectacle lens, the firmness of the film layer is crucial and is an important quality index of the lens. The quality indexes of the lens comprise wear resistance, cultural center resistance, temperature difference resistance and the like. Therefore, there are many targeted physicochemical testing methods for testing the film fastness quality of coated lenses under conditions simulating the use of the wearer. These test methods include: a salt water test, a steam test, a deionized water test, a steel wool friction test, a dissolution test, an adhesion test, a temperature difference test, a humidity test, and the like.
The top film is an antifouling film, and the adopted film coating method is a vacuum film coating method or a soaking method;
the thickness of the antifouling film is 100 nm.
The anti-fouling film can increase the oil stain resistance and water resistance of the lens.
(8) And (3) testing a finished product: firstly, the adhesion of the finished product is checked, and various defective lenses are removed according to the checking result, wherein the defective rate is 2.7%.
After the hard film coating is finished, frosted or steel wool is adopted for testing, and the conclusion is drawn that the wear resistance of the surface lens is high, and the friction haze value is 0.28 Hs.
Example three:
a lens production process comprising the steps of:
(1) preparing raw materials: selecting polycarbonate, and drying and cooling the polycarbonate;
wherein the drying temperature of the polycarbonate is 125 ℃, the drying time is 6h, and the water content of the dried polycarbonate is less than 0.02%.
Some bad dryness of polycarbonate can cause degradation in the lens production process, molecular weight reduction, and lens discoloration and brittleness, thereby affecting the quality of the lens.
(2) Preparing a mould: cleaning and drying the glass mold, and then preheating the glass mold;
wherein the preheating temperature of the glass mold is maintained between 100 ℃.
The glass mold is cleaned and dried, so that the influence of impurities attached to the interior of the mold on the quality of a lens is prevented, the mold is heated, the flowability of polycarbonate in the interior of the glass mold can be ensured in the injection molding process, and the polycarbonate can be filled in the whole glass mold.
(3) Injection molding: adding polycarbonate into an injection molding machine, heating and melting the polycarbonate, then injecting the melted polycarbonate into a glass mold, and then cooling and molding the glass mold to obtain a semi-finished product of the lens;
wherein the heating temperature of the injection molding machine is 280 ℃.
This temperature ensures complete melting of the polycarbonate without deterioration.
(4) Grinding a semi-finished product: grinding the semi-finished product, wherein the grinding process mainly comprises edging and chamfering;
the concrete method of edging is:
firstly, attaching protective gummed paper to the surface of a lens, fixing the lens by using a sucking disc, and then performing coarse grinding and fine grinding by using an edge grinding machine;
the protective gummed paper prevents the surface of the lens from being abraded, and the quality of the lens is influenced.
While chamfering is a slight bevel of 45 c on each side of the lens.
The chamfer is mainly for getting rid of the burr that the lens surface produced in the process of moulding plastics, increases the smoothness on lens surface to the chamfer can be convenient for the installation of lens and picture frame.
(5) Cleaning a semi-finished product: cleaning the ground semi-finished product for more than six times;
wherein, the specific cleaning step of the semi-finished product comprises the following steps:
cleaning in the first step: adding an organic solvent cleaning agent into a cleaning solution by using an ultrasonic cleaning machine, wherein the temperature of the cleaning solution is 55 ℃, the frequency of ultrasonic waves is 34kHz, and the cleaning time is 80 s;
and a second step of cleaning: washing with pure water at 50 deg.C for 80 s;
and a third step of cleaning: adding a water-based cleaning agent into the cleaning liquid by using an ultrasonic cleaning machine, wherein the temperature of the cleaning liquid is 55 ℃, the ultrasonic frequency is 35kHz, and the cleaning time is 80 s;
and fourthly, cleaning: washing with pure water at 67.5 deg.C for 80 s;
and after the fourth step, cleaning uniformly, wherein the cleaning method in the fourth step is the same.
The cleaning steps can ensure the cleanliness of the surface of the lens and improve the quality of the lens.
(6) Drying the semi-finished product: drying the cleaned semi-finished product by using a dryer;
wherein the drying temperature is 70 ℃.
(7) Coating treatment: performing film coating treatment on the semi-finished product after drying, wherein the film coating is a composite film, the composite film sequentially comprises a hard film, a reflection reducing film and a top film from inside to outside, and a finished product of the lens can be formed after the film coating is finished;
wherein, the hard film is a wear-resistant film, the film coating method is a soaking method, and the specific steps are as follows:
and (3) immersing the lens into the hardening liquid, keeping the temperature for 80s, then taking out the lens, polymerizing the lens for 4.5h in an oven at 100 ℃, repeating the method twice to complete the hard film coating, wherein the thickness of the hard film is 4000 nm.
The hard film can increase the wear resistance of the lens and prolong the service life of the lens.
The anti-reflection film is formed by adopting a vacuum coating method, and the method comprises the following specific steps:
the lens is firstly pre-cleaned before coating, an ultrasonic cleaning machine is used for cleaning the lens, the lens is placed in a vacuum chamber after being cleaned, and special attention needs to be paid to the process of avoiding dust and garbage in the air from being adhered to the surface of the lens again. The final cleaning is carried out before plating in the vacuum chamber, an ion gun placed in the vacuum chamber bombards the surface of the lens, and after the cleaning procedure is finished, the plating of the antireflection film is carried out, wherein the thickness of the antireflection film is 350 nm;
specifically, argon ions can be bombed by the ion gun, the vacuum evaporation process can ensure that pure coating materials are plated on the surface of the lens, and the chemical components of the coating materials can be strictly controlled in the evaporation process. The vacuum evaporation process can accurately control the thickness of the film layer, and the precision is achieved.
For the spectacle lens, the firmness of the film layer is crucial and is an important quality index of the lens. The quality indexes of the lens comprise wear resistance, cultural center resistance, temperature difference resistance and the like. Therefore, there are many targeted physicochemical testing methods for testing the film fastness quality of coated lenses under conditions simulating the use of the wearer. These test methods include: a salt water test, a steam test, a deionized water test, a steel wool friction test, a dissolution test, an adhesion test, a temperature difference test, a humidity test, and the like.
The top film is an antifouling film, and the adopted film coating method is a vacuum film coating method or a soaking method;
the thickness of the antifouling film is 75 nm.
The anti-fouling film can increase the oil stain resistance and water resistance of the lens.
(8) And (3) testing a finished product: firstly, the adhesion of the finished product is checked, and various defective lenses are removed according to the checking result, wherein the defective rate is 2.5%.
After the hard film coating is finished, frosted or steel wool is adopted for testing, and the conclusion is drawn that the wear resistance of the surface lens is high, and the friction haze value is 0.25 Hs.
The friction haze value of the anti-friction parameter of the lens is generally between 0.2 and 0.45 Hs, the lower the value is, the better the abrasion resistance is, and the embodiment I, II and III can obtain that the lens manufactured by the lens production process provided by the invention has the advantages of good abrasion resistance, high production efficiency and low defective rate, so that the high quality of the lens is ensured.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A lens production process is characterized in that: the method comprises the following steps:
(1) preparing raw materials: selecting polycarbonate, and drying and cooling the polycarbonate;
(2) preparing a mould: cleaning and drying the glass mold, and then preheating the glass mold;
(3) injection molding: adding polycarbonate into an injection molding machine, heating and melting the polycarbonate, then injecting the melted polycarbonate into a glass mold, and then cooling and molding the glass mold to obtain a semi-finished product of the lens;
(4) grinding a semi-finished product: grinding the semi-finished product, wherein the grinding process mainly comprises edging and chamfering;
(5) cleaning a semi-finished product: cleaning the ground semi-finished product for more than six times;
(6) drying the semi-finished product: drying the cleaned semi-finished product by using a dryer;
(7) coating treatment: performing film coating treatment on the semi-finished product after drying, wherein the film coating is a composite film, the composite film sequentially comprises a hard film, a reflection reducing film and a top film from inside to outside, and a finished product of the lens can be formed after the film coating is finished;
(8) and (3) testing a finished product: firstly, the adhesion of the finished product is inspected, and various defective lenses are removed according to the inspection result.
2. The lens production process of claim 1, wherein: the drying temperature of the polycarbonate in the step (1) is 120-130 ℃, the drying time is 4-8 h, and the water content of the dried polycarbonate is less than 0.02%.
3. The lens production process of claim 1, wherein: the preheating temperature of the glass mold in the step (2) is kept between 95 and 105 ℃.
4. The lens production process of claim 1, wherein: in the step (3), the heating temperature of the injection molding machine is 260-300 ℃.
5. The lens production process of claim 1, wherein: the concrete method for edging in the step (4) comprises the following steps:
firstly, attaching protective gummed paper to the surface of a lens, fixing the lens by using a sucking disc, and then performing coarse grinding and fine grinding by using an edge grinding machine;
the chamfering in the step (4) is to chamfer a slight bevel at 45 ℃ at each side of the lens.
6. The lens production process of claim 1, wherein: the specific cleaning step of the semi-finished product in the step (5) comprises the following steps:
cleaning in the first step: adding an organic solvent cleaning agent into a cleaning solution by using an ultrasonic cleaning machine, wherein the temperature of the cleaning solution is 50-60 ℃, the frequency of ultrasonic waves is 28-40 kHz, and the cleaning time is 60-100 s;
and a second step of cleaning: washing with pure water, wherein the temperature of the pure water is 45-55 ℃, and the washing time is 60-100 s;
and a third step of cleaning: adding a water-based cleaning agent into the cleaning liquid by using an ultrasonic cleaning machine, wherein the temperature of the cleaning liquid is 50-60 ℃, the frequency of ultrasonic waves is 30-40 kHz, and the cleaning time is 60-100 s;
and fourthly, cleaning: washing with pure water, wherein the temperature of the pure water is 60-75 ℃, and the washing time is 60-100 s;
and after the fourth step, cleaning uniformly, wherein the cleaning method in the fourth step is the same.
7. The lens production process of claim 1, wherein: and (3) drying at 65-75 ℃.
8. The lens production process of claim 1, wherein: the hard film in the step (7) is a wear-resistant film, the film coating method is a soaking method, and the method comprises the following specific steps:
and (3) immersing the lens into the hardening liquid, keeping the temperature for 80s, then taking out the lens, polymerizing the lens in an oven at the temperature of 95-105 ℃ for 4-5 h after taking out the lens, repeating the method twice, and finishing the hard film coating, wherein the thickness of the hard film is 3000-5000 nm.
9. The lens production process of claim 1, wherein: the anti-reflection film in the step (7) is formed by a vacuum coating method, and the method comprises the following specific steps:
the method comprises the following steps of firstly carrying out precleaning before film coating, cleaning by using an ultrasonic cleaning machine after cleaning the lens, putting the lens into a vacuum chamber, carrying out final cleaning before plating in the vacuum chamber, bombarding the surface of the lens by using an ion gun placed in the vacuum chamber, and carrying out film coating of an antireflection film after the cleaning process is finished, wherein the thickness of the antireflection film is 300-400 nm.
10. The lens production process of claim 1, wherein: the top film in the step (7) is an antifouling film, and the adopted film coating method is a vacuum film coating method or a soaking method;
the thickness of the antifouling film is 50-100 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810880484.1A CN110802855A (en) | 2018-08-04 | 2018-08-04 | Lens production process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111538166A (en) * | 2020-04-09 | 2020-08-14 | 江苏新唯尊光学眼镜有限公司 | Polycarbonate lens plated with anti-skid film and production process |
| CN111913240A (en) * | 2020-08-11 | 2020-11-10 | 中山北方晶华精密光学有限公司 | Optical lens special for mobile phone and processing method thereof |
| CN112034538A (en) * | 2020-04-21 | 2020-12-04 | 江苏新唯尊光学眼镜有限公司 | Blue-light-proof anti-ultraviolet lens and production process thereof |
| CN114228207A (en) * | 2021-12-06 | 2022-03-25 | 江西科强光学有限公司 | Processing technology for manufacturing spectacle lens by using PLA (polylactic acid) particles |
-
2018
- 2018-08-04 CN CN201810880484.1A patent/CN110802855A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111538166A (en) * | 2020-04-09 | 2020-08-14 | 江苏新唯尊光学眼镜有限公司 | Polycarbonate lens plated with anti-skid film and production process |
| CN112034538A (en) * | 2020-04-21 | 2020-12-04 | 江苏新唯尊光学眼镜有限公司 | Blue-light-proof anti-ultraviolet lens and production process thereof |
| CN111913240A (en) * | 2020-08-11 | 2020-11-10 | 中山北方晶华精密光学有限公司 | Optical lens special for mobile phone and processing method thereof |
| CN114228207A (en) * | 2021-12-06 | 2022-03-25 | 江西科强光学有限公司 | Processing technology for manufacturing spectacle lens by using PLA (polylactic acid) particles |
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