WO2019221411A1 - Procédé d'injection automatique de monomère à base d'épisulfure pour matériau optique dans un moule - Google Patents

Procédé d'injection automatique de monomère à base d'épisulfure pour matériau optique dans un moule Download PDF

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Publication number
WO2019221411A1
WO2019221411A1 PCT/KR2019/004797 KR2019004797W WO2019221411A1 WO 2019221411 A1 WO2019221411 A1 WO 2019221411A1 KR 2019004797 W KR2019004797 W KR 2019004797W WO 2019221411 A1 WO2019221411 A1 WO 2019221411A1
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Prior art keywords
mold
injection
monomer
episulfide
bis
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PCT/KR2019/004797
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English (en)
Korean (ko)
Inventor
장동규
김준섭
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주식회사 케이오씨솔루션
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Priority claimed from KR1020180137351A external-priority patent/KR102502637B1/ko
Application filed by 주식회사 케이오씨솔루션 filed Critical 주식회사 케이오씨솔루션
Priority to CN201980032511.2A priority Critical patent/CN112118955B/zh
Priority to JP2020562685A priority patent/JP7077424B2/ja
Publication of WO2019221411A1 publication Critical patent/WO2019221411A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/60—Releasing, lubricating or separating agents
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
    • C08G59/22—Di-epoxy compounds
    • C08G59/30—Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen and nitrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics

Definitions

  • the present invention relates to a method of manufacturing an optical material by injecting an episulfide monomer solution into a cavity formed between a pair of molds having an outer seal, and more particularly, to a vision while injecting an episulfide monomer solution into the cavity.
  • the present invention relates to a method for automatically injecting a mold for episulfide-based optical material monomers by using a recognition system in a short time.
  • plastic lenses are lighter than glass lenses, do not break easily, and have good workability. Therefore, plastic lenses are used more recently than glass lenses.
  • Such a plastic lens is manufactured by injecting a polymer compound called a monomer into a mold and hardening it, followed by appropriate post-processing. That is, the monomer solution is manufactured by injecting a monomer solution into a mold having a lens-shaped empty injection space (cavity).
  • Patent Document 1 discloses a 'moving distance setting device of a mold for manufacturing an eyeglass lens'.
  • Patent Document 1 is a state in which the glass molds are spaced apart from each other using a mold chuck in order to accurately determine the separation distance of the glass mold for manufacturing the spectacle lens, the adhesive is taped to the outer peripheral surface of the glass mold and the monomer on the glass mold is completed The method of injecting the solution manually is introduced.
  • liquid monomer generates a volatile gas harmful to the human body, it may adversely affect the health of the operator when working for a long time.
  • Episulfide optical materials have excellent refractive index and high Abbe number.
  • Korean Patent No. 10-0681218 proposes an episulfide plastic lens.
  • optical materials polymerized with episulfide-based monomers alone have problems in terms of tensile strength, compressive strength, colorability, hard adhesion, productivity, and the like.
  • a method of copolymerizing two different types of resins namely, A method of copolymerizing an episulfide compound and a polythiol compound or a polyisocyanate compound together has been proposed in Korean Patent Registration No. 10-0417985, Japanese Patent Laid-Open No. 11-352302, and the like.
  • Patent Document 2 Korean Patent No. 10-1383132 discloses a monomer auto-injection equipment for eyeglass lenses and a method for producing eyeglass lenses using the same.
  • the position of a lens mold is grasped
  • the displacement sensor laser sensor
  • the monomer composition is more viscous than water, so that the change in the water level is not a horizontal change but a two-dimensional symmetrical parabola.
  • it was difficult to accurately detect the water level in real time which made it difficult to inject the correct amount despite the stepwise adjustment of the injection amount, resulting in insufficient injection amount or excessive injection amount, leading to product defects or overflowing monomers.
  • the composition could contaminate the injection equipment.
  • ⁇ Plastic product manufacturing method and manufacturing apparatus '' of Patent Document 3 is a method for automating the process of injecting a plastic stock solution into a molding mold during a plastic lens manufacturing process.
  • the first flow rate and the first time are set by measuring the width between the first and second wall portions, and the first step of injecting the plastic stock solution for the first time at the first flow rate into the cavity; and the first step following the first step.
  • It has a second process of injecting the plastic stock solution at a second flow rate less than the flow rate so as to inject the stock solution at a large flow rate only for a predetermined time, and then, after the injection of the stock solution at a small flow rate toward the end of the injection, At the same time, the amount of leakage can be reduced.
  • Patent Document 4 is a suitable method for injecting the raw material so that bubbles do not remain, but it was still difficult to inject the raw material in the correct amount.
  • Patent Document 1 Republic of Korea Utility Model Registration No. 20-0236704
  • Patent Document 2 2. Republic of Korea Patent No. 10-1383132
  • Patent Document 3 Japanese Patent No. 3707189
  • Patent Document 4 Japanese Patent Application Publication No. 2007-80766
  • Patent Document 5 (Patent Document 5) 5. Republic of Korea Patent Registration 10-0417985
  • Patent Document 6 JP 11-352302 A
  • Patent Document 7 7. Republic of Korea Patent Registration 10-0681218
  • each monomer has a difference in curing rate, curing time, difference in viscosity, difference in oil level, and composition in the same series of monomers. There is a problem that it is difficult to precise injection because it can not cope with the difference.
  • an object of the present invention is to mold the episulfide-based optical material monomer that can accurately inject the monomer composition for episulfide-based optical material into the mold without insufficient injection amount or excessive injection amount It is to provide an automatic injection method.
  • the present invention injects the monomer composition for episulfide-based optical material divided into two stages in the cavity of the mold, injecting most of the first step in the first step and then in the second step of the episulfide monomer solution using a vision recognition system
  • a vision recognition system to automatically inject mold of episulfide optical monomer by detecting the oil level and stopping the injection when the oil level is detected at the final injection point can shorten the injection time and quantitatively prevent the monomer solution from overflowing or lacking.
  • the purpose is to provide.
  • step (c) following the step (b) following the step of injecting the monomer composition into the cavity while detecting the oil surface using a vision recognition system to terminate the injection of the monomer composition when the oil surface is detected at the final injection point set;
  • a vision recognition system to terminate the injection of the monomer composition when the oil surface is detected at the final injection point set;
  • the monomer composition may be injected into the cavity by a predetermined weight or volume, or may be injected to a predetermined area in the mold using a vision recognition system.
  • the vision recognition system photographs the contour of the mold and the oil level of the monomer solution injected into the mold, wherein the first region is located at a part of the mold contour to detect a state in which the mold is set at the injection position, and outside the mold.
  • the second area located may be set.
  • the controller injects most of the monomer solution into the mold at the first injection pressure, when the controller detects the contour of the mold in the first region. If the oil level is detected in the second region while injecting the residual amount of the monomer solution at a pressure lower than the first injection pressure, the injection of the monomer solution is terminated.
  • the contour of the mold and the oil level of the monomer solution are detected by the change in the number of pixels.
  • the virtual contour is displayed in the form of an arc in the first region, the photographing position is adjusted so that the contour of the mold photographed when the mold contour in the first region is matched with the virtual contour. As the position of the first region changes, the position of the second region is moved together to detect a change in oil level.
  • the first region means a position having both diagonal direction information, that is, the X direction information and the Y direction information of the mold, and the position change of the mold when the mold is placed as an injection position.
  • the first region serves as a reference for the positional movement of the second region. In the first region, the contour of the mold is immediately detected when the mold is seated at the injection position.
  • the second region is set outside of a position close to the monomer inlet of the mold to fill the monomer solution without bubbles in the cavity inside the mold, and is generally installed at a position within 1 to 2 mm from the mold contour. .
  • the controller is to inject 70 ⁇ 99% of the monomer solution at a high pressure, that is, at a high speed when the first injection of the monomer solution injected into the syringe into the mold, and to slowly inject the remaining amount at a low pressure Control the syringe drive.
  • the monomer composition for episulfide-based optical materials includes a compound having one or more episulfide groups.
  • the episulfide-based monomer composition for optical materials further comprises one or more of polythiol compounds, sulfur, polyisocyanate compounds.
  • the monomer composition for episulfide optical material may further include an internal mold release agent as necessary.
  • the injection of the monomer composition is made in the temperature range of -5 ⁇ 50 °C.
  • the injection when injection of the monomer for episulfide optical material into the mold, the injection is automatically stopped when the final injection point is reached while checking the oil level using a vision recognition system, so that the monomer solution is not insufficient and does not overflow. This is possible.
  • the injection time of the monomers can be shortened by providing a step of injecting most of the monomers into the cavity inside the mold firstly quickly, it is easy to set the injection to be completed within a predetermined pot life, and thus curing according to the monomers. Irrespective of the difference in speed and curing time, dosing can be carried out at optimum conditions before curing.
  • the present invention it is possible to produce high quality episulfide lenses by automatic injection, without defects due to lack of injection amount or excess, so that productivity can be greatly improved and production cost can be reduced due to labor cost reduction, and the operator can use the monomer Abnormal operation or failure of the equipment due to direct exposure to the product and excessive injection of the monomer composition can also be prevented.
  • FIG. 1 is a flowchart schematically illustrating a lens manufacturing process according to an embodiment of the present invention
  • FIG. 2 is a block diagram of a monomer automatic injection method according to an embodiment of the present invention
  • FIG. 5 illustrates a state in which the monomer solution is filled in the mold in FIG. 4.
  • step (c) injecting the monomer composition into the cavity and detecting the oil level using a vision recognition system to terminate the injection of the monomer composition when oil is detected at the final injection point.
  • the monomer composition for episulfide-based optical materials is meant to include all compositions for optical materials including a compound having at least one episulfide group.
  • the 'monomer solution' refers to when the monomer composition is in a liquid state with fluidity.
  • the monomer composition for episulfide optical materials has a viscosity of 15 to 900 cps at a solid phase refractive index of 1.650 to 1.820 and 25 ° C. More preferably, the viscosity is 20-500 cps at 25 degreeC.
  • Examples of the compound having an episulfide group include bis (2,3-epiopropyl) sulfide, bis (2,3-epiopropyl) disulfide, and 2,3-epoxypropyl (2,3- epithiopropyl ) Disulfide, 2,3-epoxypropyl (2,3-epithiopropyl) sulfide, 1,3 and 1,4-bis ( ⁇ -epithiopropylthio) cyclohexane, 1,3 and 1,4-bis ( ⁇ -epithiopropylthiomethyl) cyclohexane, bis [4- ( ⁇ -ethiothiothio) cyclohexyl] methane, 2,2-bis [4- ( ⁇ -ethiothiothiothiocyclohexyl] propane, bis Episulfide compounds having an alicyclic skeleton such as [4- ( ⁇ -epithiopropylthio
  • halogen substituents such as chlorine substituents and bromine substituents, alkyl substituents, alkoxy substituents, nitro substituents and prepolymer-modified compounds with polythiol may be used.
  • the compound having an episulfide group preferably, bis (2,3-ethiothio) sulfide, bis (2,3-ethiothio) disulfide, 2,3-epoxypropyl (2,3-epiopropyl) ) Sulfide, 2,3-epoxypropyl (2,3-epiopropyl) disulfide, 1,3 and 1,4-bis ( ⁇ -epithiopropylthio) cyclohexane, 1,3 and 1,4-bis ( ⁇ -epithiopropylthiomethyl) cyclohexane, 2,5-bis ( ⁇ -ethiothiopropylthiomethyl) -1,4-dithiane, 2,5-bis ( ⁇ -ethiothiopropylthioethylthiomethyl)- One or more of 1,4-dithiane, 2- (2- ⁇ -epithiopropylthioethylthio) -1,3
  • the monomer composition for episulfide optical material further comprises at least one of polythiol compound, sulfur, polyisocyanate compound.
  • the said polythiol compound is not specifically limited, If it is a compound which has at least 1 or more thiol groups, 1 type (s) or 2 or more types can be mixed and used for it.
  • 1 type (s) or 2 or more types can be mixed and used for it.
  • the polymerization modified body obtained by the prepolymerization with an isocyanate, an episulfide compound, a ethane compound, or the compound which has an unsaturated bond as a resin modifier to a polythiol compound can also be used.
  • the polythiol compound is more preferably 2,3-bis (2-mercaptoethylthio) propane-1-thiol (GST), 4,8-dimercaptomethyl-1,11-dimercapto-3 , 6,9-trithiaoundecan (FSH), 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaoundecan (FSH), 5,7-dimer At least one of captomethyl-1,11-dimercapto-3,6,9-trithiaoundecan (FSH).
  • GST 2,3-bis (2-mercaptoethylthio) propane-1-thiol
  • FSH 4,8-dimercaptomethyl-1,11-dimercapto-3 , 6,9-trithiaoundecan
  • FSH 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaoundecan
  • FSH captomethyl-1,11-dimercapto
  • Polythiol may preferably be included in the monomer composition 1 to 15% by weight, more preferably 4 to 13% by weight, still more preferably 5 to 11% by weight.
  • the polyisocyanate compound is not particularly limited and a compound having at least one isocyanate group and / or isothiocyanate group can be used.
  • the compound has at least one isocyanate group and / or isothiocyanate group, one kind or two or more kinds can be used.
  • halogen substituents such as chlorine substituents and bromine substituents, alkyl substituents, alkoxy substituents, nitro substituents, prepolymer-type modified compounds with polyhydric alcohols or thiols, carbodiimide modified products, urea modified products and biuret modified compounds of these isocyanate compounds.
  • dimerization, trimerization reaction products and the like can also be used.
  • isophorone diisocyanate IPDI
  • hexamethylene diisocyanate HDI
  • dicyclohexyl methane diisocyanate H12MDI
  • xylylene diisocyanate XDI
  • 3,8-bis (iso Cyanatomethyl) tricyclo [5,2,1,02,6] decane 3,9-bis (isocyanatomethyl) tricyclo [5,2,1,02,6] decane
  • 4,8-bis (Isocyanatomethyl) tricyclo [5,2,1,02,6] decane 2,5-bis (isocyanatomethyl) bicyclo [2,2,1] heptane
  • 2,6-bis iso One or more selected from cyanatomethyl) bicyclo [2,2,1] heptane can be used.
  • the monomer composition may further include sulfur. Including more sulfur can increase the refractive index to 1.71 or more.
  • the sulfur is preferably at least 98% pure. If less than 98%, the transparency of the optical material may be degraded due to the influence of impurities.
  • the purity of sulfur is more preferably 99.0% or more, particularly preferably 99.5% or more.
  • Commercially available sulfur is classified by the difference in shape or purification method, and there are fine powder sulfur, colloidal sulfur, precipitated sulfur, crystal sulfur, sublimed sulfur, and the like. In the present invention, any sulfur can be used as long as the purity is 98% or more.
  • fine powder of fine particles that can be easily dissolved may be used in preparing the composition for an optical material.
  • the content of sulfur in the monomer composition is preferably 1 to 40% by weight in the total weight of the composition, more preferably 2 to 30% by weight, most preferably 3 to 22% by weight.
  • the monomer composition for episulfide optical material may further include a polymerization catalyst.
  • the polymerization catalyst is preferably one or more selected from amines, quaternary ammonium salts, quaternary phosphonium salts, tertiary sulfonium salts, secondary iodonium salts, and phosphine compounds. More preferably, at least one selected from quaternary ammonium salts, quaternary phosphonium salts, and phosphine compounds can be used.
  • quaternary ammonium salt for example, tetra-n-butylammonium bromide, tetraphenylammonium bromide, triethylbenzylammonium chloride, cetyldimethylbenzyl ammonium chloride, 1-n-dodecylpyridinium chloride or the like can be used.
  • quaternary phosphonium salt tetra-n-butylphosphonium bromide, tetraphenylphosphonium bromide or the like can be used, for example.
  • Triphenylphosphine etc. can be used as a phosphine compound.
  • the polymerization catalyst is a quaternary phosphonium salt and contains any one of tetra-n-butylphosphonium bromide and tetraphenylphosphonium bromide. These polymerization catalysts can be used individually or in mixture of 2 or more types.
  • the episulfide optical material composition may further include a tin halogen compound as a polymerization regulator.
  • the tin halide compound may be preferably any one of dibutyltin dichloride and dimethyltin dichloride or a small amount of monomethyltin trichloride contained therein. More preferably monomethyltin trichloride may be included in 0.1 to 3.5% by weight.
  • the said polymerization regulator in 0.01-5 weight% of the total weight of a monomer composition.
  • the polymerization rate can be adjusted to suppress a sudden increase in viscosity, and as a result, the polymerization yield is increased and bubbles are also eliminated.
  • alkylimidazole When sulfur is included in the composition for episulfide optical materials, it is preferable to form a prepolymer and then polymerize.
  • alkylimidazole may be further included as a polymerization regulator.
  • the alkylimidazole particularly preferably comprises 2-mercapto-1-methylimidazole.
  • 2-mercapto-1-methylimidazole is preferably used with a purity of 98% or more.
  • Preferably in the monomer composition may be included 0.01 to 5% by weight, more preferably 0.1 to 3% by weight, more preferably 0.15 to 1% by weight may be included.
  • the monomer composition may further include an internal mold release agent.
  • the release property after polymerization can be greatly improved by adding an internal release agent in the composition before the casting polymerization.
  • an internal mold release agent a phosphate ester compound, a silicone type surfactant, a fluorine type surfactant, an alkyl quaternary ammonium salt, etc. can be used individually or in combination of 2 or more types, respectively.
  • the internal mold release agent is preferably included at 0.001 to 10% by weight in the polymerizable composition.
  • Fluorine-based nonionic surfactants are compounds having a perfluoroalkyl group in the molecule, such as Eudin DS-401 TM (Japan, Daishin Industrial Co., Ltd.), Unidin DS-403 TM (Japan, Daikin Industrial Co., Ltd.), Eftop EF. 122A TM (Japan, Shin-Avada Chemical Co., Ltd.), Effope EF 126 TM (Japan, Shin-Avada Chemical Co., Ltd.), and Eftop EF 301 TM (Japan, Shin-Avada Chemical Co., Ltd.).
  • Silicone-based nonionic surfactants are compounds having a dimethylpolysiloxane group in a molecule, such as Q2-120A TM of Dow, USA.
  • Alkyl quaternary ammonium salts are commonly known as cationic surfactants, and there are halogem salts, phosphates, sulfates and the like, and examples of the chloride type thereof include trimethylcetyl ammonium chloride, trimethyl stearyl ammonium chloride, dimethylethylcetyl ammonium chloride, Triethyldecylammonium chloride, trioctylmethyl ammonium chloride, diethylcyclohexide, decylammonium chloride and the like.
  • a phosphate ester compound may be used as the internal release agent.
  • the phosphate ester compound is prepared by adding 2-3 moles of an alcohol compound to phosphorus pentoside (P 2 O 5 ), and various types of phosphate ester compounds can be obtained depending on the type of alcohol used. Typical examples include those in which ethylene oxide or propylene oxide is added to the aliphatic alcohol, or ethylene oxide or propylene oxide is added to the nonylphenol group.
  • P 2 O 5 phosphorus pentoside
  • Typical examples include those in which ethylene oxide or propylene oxide is added to the aliphatic alcohol, or ethylene oxide or propylene oxide is added to the nonylphenol group.
  • the phosphate ester compound added with ethylene oxide or propylene oxide is included as an internal mold release agent, an optical material having good release property and excellent quality can be obtained.
  • the composition of the present invention is an internal mold release agent, preferably 4-PENPP [polyoxyethylene nonyl phenol ether phosphate (5% by weight 5 mol ethylene oxide, 80% by weight 4 mol added ethylene oxide, 3 mol addition 10% by weight, 1 mole added 5% by weight)], 8-PENPP [polyoxyethylene nonylphenol ether phosphate (3% by weight 9 mole of ethylene oxide added, 80% by weight 8 mole added, 9 Mole added 5% by weight, 7 mole added 6% by weight, 6 mole added 6% by weight)], 12-PENPP [polyoxyethylenenonylphenoletherphosphate (13 mole added by ethylene oxide 3% by weight) , 12 mole added 80%, 11 mole added 8%, 9 mole added 3%, 4 mole added 6% by weight)], 16-PENPP [polyoxyethylene nonylphenol ether phosphate (3% by weight of 17 mole added ethylene oxide, 79% by 16 mole added, 10% by weight 15 mole added, 4%
  • the monomer composition may further include an olefin compound as a reactive resin modifier for the purpose of controlling impact resistance, specific gravity, monomer viscosity, etc., in order to improve optical properties of the optical material.
  • an olefin compound which can be added as a resin modifier for example, benzyl acrylate, benzyl methacrylate, butoxyethyl acrylate, butoxymethyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, 2 Hydroxyethyl acrylate, 2-hydroxymethyl methacrylate, glycidyl acrylate, glycidyl methacrylate, phenoxy ethyl acrylate, phenoxy ethyl methacrylate, phenyl methacrylate, ethylene glycol di Acrylate, ethylene glycol dimethacrylate, diethylene glycol diacrylate, diethylene glycol dimethacrylate, triethylene glycol diacrylate, tri
  • the monomer composition if necessary, various additives such as chain extenders, crosslinking agents, light stabilizers, antioxidants, colorants, ultraviolet absorbers, organic dyes, inorganic pigments, fillers, adhesion improving agents, etc. It may further include.
  • pouring of the said monomer composition is made in the temperature range of -5-50 degreeC.
  • the pot life can be properly maintained, and a high-quality optical material free of stria and turbidity can be obtained by a smooth polymerization reaction.
  • the temperature at the time of injection may be -5-30 degreeC.
  • the high refractive index episulfide optical lens having the highest quality may be produced when the temperature is in the range of -5 to 15 ° C.
  • the monomer composition may be injected into the cavity by a predetermined weight or volume, or may be injected to a predetermined area in the mold using a vision recognition system.
  • the step (c) is to detect the oil surface using a vision recognition system to terminate the injection of the monomer composition when the oil surface is detected at the final injection point set.
  • a method of automatically injecting a monomer solution into a mold to manufacture an optical material such as a lens includes loading a mold (S10), taping (S20), opening a tape (S30), and injecting a monomer ( S40), the tape closing (S50) and the mold unloading (S60) step, and the subsequent process of curing the monomer after the separation from the mold to complete the lens, these processes are basically the same as the existing method Do.
  • the monomer of the raw material tank is injected into the cavity of the mold, and a specific method of stopping the injection of the monomer solution is provided by detecting the oil level using a vision recognition system and detecting the oil level at the final injection point.
  • the monomer solution (S) of the monomer solution tank (10) is first suctioned into the syringe (20) capable of volume control according to the cavity of the mold (M), and then the syringe (20) Inject the monomer solution (S) injected into the mold (M) in the second most of the amount at a high speed, and lower the injection pressure to inject the remaining amount, finally using the non-recognition system to the monomer solution (S)
  • the injection is finished after confirming that the mold M is filled inside.
  • the vision recognition system photographs the contour of the mold M and the oil level L1 of the monomer solution S injected into the cavity of the mold M, as shown in FIGS. 2 to 5.
  • the first region A1 of a part of the contour of the mold M and the second region A2 located outside the injection hole of the mold M are set to detect a state in which the mold M is set at the injection position. It is.
  • the controller (C) is the image signal photographed by the vision recognition system, that is, as shown in Figure 2 when the contour of the mold (M) is detected in the first area (A1), the mold (M) in the injection position
  • the contour of the mold M and the virtual contour L displayed in the arc shape in the first area A1 are determined to match.
  • Fine adjustment that is, by adjusting the position of the vision camera is subjected to a photographing position adjusting step of matching the virtual contour (L) with the contour of the mold (M).
  • the position of the first region A1 is adjusted and at the same time the position of the second region is equidistantly moved together with the first region A1, so that the position of the mold M is placed in the injection apparatus.
  • the second area (A2) to be photographed in the vision recognition system is slightly changed by the second area (A2) to be photographed in the vision recognition system to capture the same position to detect the change in the surface of the monomer solution.
  • the controller (C) analyzes the image taken by the vision recognition system to detect the capacity of the cavity and whether the injection position is set according to the type of the mold (M), and the drive unit 22 and the valve of the syringe 20 ( By controlling the opening and closing operation of V), as shown in FIG. 3, the amount of first suction of the monomer solution S into the syringe 20 and the time of injection of the monomer solution M into the mold M, the injection pressure, and the end point of injection are shown. Control and fine adjustment of the vision recognition system.
  • controller (C) sets the injection pressure differently according to the type of the mold (M) and the monomer solution (S) by an external input means such as a touch pad or a keyboard, and a new type of mold or monomer solution. In use, it is possible to find and set the optimum injection pressure by storing the data obtained through repeated tests.
  • the driving unit 22 inhales the monomer solution into the interior of the syringe 20 by the plunger 23 is moved forward and backward by the power of a motor (not shown), or the sucked monomer solution into the mold (M).
  • a motor not shown
  • the present invention is not limited thereto, and the driving method of the driving unit 22 may use various known methods.
  • the monomer solution S is sucked into the syringe 20 so as to match the cavity capacity of the mold M according to the type of the mold M supplied, wherein the raw material tank ( The valve (V) installed between the 10) and the syringe 20 maintains an open state, and the nozzle 21 portion of the nozzle 21 has a syringe in a state in which air from the outside is blocked by a built-in check valve (not shown). (20) The upper driving unit 22 is operated to fill the monomer 20 with the quantitative amount of the monomer solution S.
  • valve (V) may be controlled to open and close operation by the controller (C), is opened when the drive unit 22 of the syringe 20 to perform the suction operation using a check valve, that is, discharge operation
  • a check valve that is, discharge operation
  • the injection into the mold can also be automatically closed.
  • the position of the camera is finely adjusted to match the virtual contour L. It is understood that the mold M is seated at the injection position, and the driving unit 22 is driven in the opposite direction to the primary, so that the monomer solution S inside the syringe 20 is nozzled.
  • the driving is to inject only a predetermined amount of the monomer solution (S), the predetermined amount is set to be 70 to 99% of the amount first injected into the syringe 20, more preferably 90 to 98% It is.
  • the injection pressure of the monomer solution S may be injected at the highest pressure within the range where bubbles are not generated in the monomer solution according to the viscosity of the monomer solution or the cavity thickness inside the mold, so that the injection time can be shortened. do.
  • the monomer solution S is applied at a first injection pressure set in advance according to the type of the supplied mold. Most of the injection into the mold (M), and then the remaining amount is injected at a pressure relatively lower than the first injection pressure and whether the oil surface (L1) appears in the second area (A2) located outside the mold (M) When the oil surface (L1) appears to confirm whether the injection of the monomer solution is terminated, if the oil surface does not appear, the monomer solution is injected at a minute pressure until the oil surface appears in the second region (A2).
  • the contour of the mold or the oil level of the monomer solution is detected by the change in the number of pixels.
  • the contour of the mold and the oil level of the monomer solution are determined by the difference in density between air, the mold, and the monomer solution.
  • the boundary portion is seen as a linear shade, whereby the outline of the mold and the oil surface of the monomer solution are formed by the number of pixels formed by the linear shade photographed in each region.
  • the contour of the mold M detected in the areas A1 and A2 and the surface thickness of the monomer solution are generally constant, so that the number of pixels detected is almost constant, but the peripheral parts are all operating rapidly, And other movements of the device, which may be reflected by a strange phenomenon in the mold or the monomer solution, and thus may be misdetected. To prevent this.
  • the amount of the monomer solution injected at the first injection pressure is appropriately 70 to 99% of the total injection amount, but the present invention is not limited thereto, and the primary injection amount is somewhat different depending on the type of mold and the viscosity of the monomer solution. Of course, it can be set.
  • the amount of the monomer solution injected at the first injection pressure is more preferably 90 to 98% of the total injection amount.
  • the most viscous monomer solution is rapidly injected into the cavity inside the mold at a high first pressure, and then the remaining pressure is gradually filled to reduce the injection pressure while using a vision recognition system at the final stage. As such, there is no risk of exceeding the injection volume.
  • most of the monomer solution is injected into the mold within a short time, and when the monomer solution in the second area is detected by the vision recognition system, the injection is terminated. Since the injection can produce a lens of uniform quality, and can shorten the injection time of the monomer can maximize the efficiency of the monomer injection operation. Accordingly, it is possible to prevent defects due to insufficient injection amount of the monomer solution and to prevent abnormal operation or failure of equipment caused by excessive injection of the monomer solution.
  • A1, A2 detection area

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un matériau optique par l'injection d'une solution de monomère à base d'épisulfure dans une cavité formée entre une paire de moules, dont les périphéries externes sont scellées et, plus particulièrement, un procédé d'injection automatique d'un monomère à base d'épisulfure pour un matériau optique dans un moule, un système de reconnaissance visuelle étant utilisé pendant l'injection de la solution de monomère à base d'épisulfure dans la cavité de sorte qu'une quantité nominale de celle-ci peut être injectée en une période de temps courte. La présente invention concerne un procédé d'injection automatique d'un monomère à base d'épisulfure pour un matériau optique dans un moule, le procédé comprenant les étapes consistant à : (a) préparer une composition de monomère à base d'épisulfure pour un matériau optique présentant un indice de réfraction à l'état solide de 1,650 à 1,820 et une viscosité de 15 à 900 cps (25 °C) ; (b) injecter la majeure partie de la composition de monomère dans une cavité formée entre une paire de moules, dont les périphéries externes sont scellées ; et (c) détecter une surface de fluide à l'aide d'un système de reconnaissance visuelle tout en injectant la composition de monomère dans la cavité, à la suite de l'étape (b), de sorte que, si la surface du fluide est détectée au niveau d'un point d'injection final défini, l'injection de la composition de monomère est terminée. Selon la présente invention, une quantité nominale de solution de monomère à base d'épisulfure pour un matériau optique peut être automatiquement injectée dans un moule de sorte que la solution n'est ni insuffisante ni ne déborde.
PCT/KR2019/004797 2018-05-14 2019-04-22 Procédé d'injection automatique de monomère à base d'épisulfure pour matériau optique dans un moule WO2019221411A1 (fr)

Priority Applications (2)

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CN201980032511.2A CN112118955B (zh) 2018-05-14 2019-04-22 环硫化物类光学材料用单体的模具自动注入方法
JP2020562685A JP7077424B2 (ja) 2018-05-14 2019-04-22 エピスルフィド系光学材料用モノマーのモールド自動注入方法

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KR10-2018-0055092 2018-05-14
KR20180055092 2018-05-14
KR1020180137351A KR102502637B1 (ko) 2018-05-14 2018-11-09 에피설파이드계 광학재료용 모노머의 몰드 자동 주입방법
KR10-2018-0137351 2018-11-09

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10264179A (ja) * 1997-03-26 1998-10-06 Seiko Epson Corp プラスチック製品の製造方法および製造装置
JP2010240866A (ja) * 2009-04-01 2010-10-28 Seiko Epson Corp プラスチックレンズ成形装置
JP2012233044A (ja) * 2011-04-28 2012-11-29 Mitsubishi Gas Chemical Co Inc 硬化性組成物および光学接着剤
KR20140040056A (ko) * 2012-09-24 2014-04-02 주식회사 케이오씨솔루션 에피설파이드 화합물의 보관방법과 이 에피설파이드 화합물을 이용한 티오에폭시계 광학재료의 제조방법
KR20170078780A (ko) * 2015-03-31 2017-07-07 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 신규 에피설파이드 화합물 및 이것을 포함하는 광학재료 조성물

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10264179A (ja) * 1997-03-26 1998-10-06 Seiko Epson Corp プラスチック製品の製造方法および製造装置
JP2010240866A (ja) * 2009-04-01 2010-10-28 Seiko Epson Corp プラスチックレンズ成形装置
JP2012233044A (ja) * 2011-04-28 2012-11-29 Mitsubishi Gas Chemical Co Inc 硬化性組成物および光学接着剤
KR20140040056A (ko) * 2012-09-24 2014-04-02 주식회사 케이오씨솔루션 에피설파이드 화합물의 보관방법과 이 에피설파이드 화합물을 이용한 티오에폭시계 광학재료의 제조방법
KR20170078780A (ko) * 2015-03-31 2017-07-07 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 신규 에피설파이드 화합물 및 이것을 포함하는 광학재료 조성물

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