WO2019221409A1 - Procédé automatique d'injection en moule pour un monomère destiné à un matériau optique à base de thiouréthane - Google Patents

Procédé automatique d'injection en moule pour un monomère destiné à un matériau optique à base de thiouréthane Download PDF

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WO2019221409A1
WO2019221409A1 PCT/KR2019/004736 KR2019004736W WO2019221409A1 WO 2019221409 A1 WO2019221409 A1 WO 2019221409A1 KR 2019004736 W KR2019004736 W KR 2019004736W WO 2019221409 A1 WO2019221409 A1 WO 2019221409A1
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WIPO (PCT)
Prior art keywords
mold
injection
monomer
bis
thiourethane
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PCT/KR2019/004736
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English (en)
Korean (ko)
Inventor
장동규
김준섭
Original Assignee
주식회사 케이오씨솔루션
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Priority claimed from KR1020180137344A external-priority patent/KR102522289B1/ko
Application filed by 주식회사 케이오씨솔루션 filed Critical 주식회사 케이오씨솔루션
Priority to CN201980032014.2A priority Critical patent/CN112188954B/zh
Priority to JP2020562584A priority patent/JP7077423B2/ja
Publication of WO2019221409A1 publication Critical patent/WO2019221409A1/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
    • B29C33/62—Releasing, lubricating or separating agents based on polymers or oligomers
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • 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 for manufacturing an optical material by injecting a thiourethane-based monomer solution into a cavity formed between a pair of molds of the outer seal, more specifically, a vision recognition system while injecting a thiourethane-based monomer solution into the cavity
  • the present invention relates to a method for automatically injecting a mold for a thiourethane-based optical material monomer capable of quantitative injection within 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.
  • Thiourethane-based optical materials are widely used as optical lens materials because of excellent optical properties such as transparency, Abbe's number, transmittance and phosphorus strength.
  • Korean Patent Nos. 10-0136698, 10-0051275, 10-0051939, 10-0056025, 10-0040546, 10-0113627, and the like a polyisocyanate compound and a polythiol compound are thermally cured to manufacture a thiourethane optical lens.
  • Reduction of production cost is one of the major concerns in the field of optical lenses including thiourethane optical materials. If automatic injection is possible in an automatic production facility without going through a human hand, not only productivity improvement but also human hazards in the production process can be solved. However, despite many attempts, automation of injection is still difficult. This is also caused by the high viscosity of the monomer composition, the difference in viscosity and pot life according to the composition.
  • 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 10-0136698
  • Patent Document 6 Republic of Korea Patent Publication 10-0051275
  • Patent Document 7 7. Republic of Korea Patent Registration 10-0051939
  • Patent Document 8 8. Republic of Korea Patent Registration 10-0056025
  • Patent Document 9 9. Republic of Korea Registered Patent Publication 10-0040546
  • 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.
  • the present invention has been made to solve the above problems, and an object of the present invention is to automatically inject a mold for a thiourethane-based optical material monomer capable of accurately injecting a monomer composition for a thiourethane-based optical material into a mold without a lack of an injection amount or an excessive injection amount. To provide a way.
  • the present invention injects the monomer composition for the thiourethane-based optical material divided into the cavity of the mold in two stages, the majority of the first stage is injected, and then in the second stage the oil level of the thiourethane-based monomer solution using a vision recognition system It provides a method for automatically injecting a mold for a thiourethane-based optical material monomer which can shorten the injection time by detecting the oil level when the oil level is detected at the final injection point and quantitatively prevent the monomer solution from overflowing or lacking. There is a purpose.
  • step (c) following the step (b) following the step of injecting the monomer composition into the cavity and 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 thiourethane-based optical monomer composition includes a polythiol compound and a polyisocyanate compound.
  • the thiourethane-based optical monomer composition may further include an internal mold release agent as necessary.
  • the injection of the monomer composition is made in the temperature range of 5 ⁇ 60 °C.
  • the injection of the thiourethane-based optical monomer in the mold using the vision recognition system to check the oil level and reaches the final injection point the injection is automatically stopped, so that the injection of the monomer solution is not short and does not overflow It 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 productivity can be greatly improved and the production cost can be reduced by reducing labor costs.
  • the problem of direct exposure and abnormal operation or failure of equipment due to excessive injection of 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 the thiourethane-based optical material is meant to include both a polythiol compound and a polyiso (thio) cyanate compound or a composition including a prepolymer thereof.
  • the 'monomer solution' refers to when the monomer composition is in a liquid state with fluidity.
  • the thiourethane optical material monomer composition has a viscosity of 20 to 1,000 cps at a solid phase refractive index of 1.523 to 1.690 and 25 ° C. More preferably, the viscosity is 30-500 cps at 25 degreeC.
  • the polyisocyanate compound is preferably isophorone diisocyanate, dicyclohexyl methane-4,4-diisocyanate (H 12 MDI), hexamethylene diisocyanate, methylcyclohexanediisocyanate, tolylene diisocyanate, phenylene diisocyanate, 1,3,5-tris (6-isocyanato-hexyl)-[1,3,5] -triziane-2,4,6-trione (HDI trimer), o, m, p-xyl
  • One or two or more polyisocyanates selected from the group consisting of rendiisocyanate (o, m, p-xylylenediisocyanate) and tetramethylxylylenediisocyanate (TMXDI) can be used alone or together.
  • a general-purpose isocyanate compound which is preferably supplied at low cost may be used.
  • the monomer composition of the present invention may further include one or two or more other iso (thio) cyanate compounds in addition to the isocyanate.
  • iso (thio) cyanate compound examples include 2,2-dimethylpentane diisocyanate, 2,2,4-trimethylhexanediisocyanate, butene diisocyanate, 1,3-butadiene-1,4-diisocyanate, 2, 4,4-trimethylhexamethylene diisocyanate, 1,6,11-undectriisocyanate, 1,3,6-hexamethylenetriisocyanate, 1,8-diisocyanate-4-isocyanatomethyloctane, bis (iso Aliphatic isocyanate compounds including cyanatoethyl) carbonate and bis (isocyanatoethyl) ether;
  • the polythiol compound is not particularly limited, and a compound having two or more thiol groups in one molecule may be used.
  • the polythiol compound is 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 2,3-bis (2-mercaptoethylthio) -3-propane-1 -Thiol, 2,2-bis (mercaptomethyl) -1,3-propanedithiol, bis (2-mercaptoethyl) sulfide, tetrakis (mercaptomethyl) methane; 2- (2-mercaptoethylthio) propane-1,3-dithiol, 2- (2,3-bis (2-mercaptoethylthio) propylthio) ethanethiol, bis (2,3-dimercapto Propaneyl) sulfide, bis (2,3-dimercaptopropanyl) disulfide, 1,2-bis (2
  • the polythiol compound is 2- (2-mercaptoethylthio) propane-1,3-dithiol; 2,3-bis (2-mercaptoethylthio) propane-1-thiol; 2- (2,3-bis (2-mercaptoethylthio) propylthio) ethanethiol; 1,2-bis (2-mercaptoethylthio) -3-mercaptopropane; 1,2-bis (2- (2-mercaptoethylthio) -3-mercaptopropylthio) -ethane; Bis (2- (2-mercaptoethylthio) -3-mercaptopropyl) sulfide; 2- (2-mercaptoethylthio) -3-2-mercapto-3- [3-mercapto-2- (2-mercaptoethylthio) -propylthio] propylthio-propane-1-thiol; 2,2'-thiodietanth
  • the thiourethane optical material monomer composition may further include optional components such as a polymerization catalyst, an internal mold release agent, an ultraviolet absorber, a dye, a stabilizer, a bluing agent, a crosslinking agent, a light stabilizer, an antioxidant, and a filler, as necessary. have.
  • a phosphate ester compound As said internal mold release agent, a phosphate ester compound, a silicone type surfactant, a fluorine type surfactant, etc. can be used individually or in combination of 2 or more types, respectively.
  • a phosphate ester compound is used as an internal mold release agent.
  • Phosphoric acid ester compound is prepared by adding 2-3 mol alcohol compound to phosphorus pentoside (P 2 O 5 ), and there may be various forms of acidic phosphoric acid ester compound 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.
  • the phosphate ester compound used as the internal mold release agent is preferably polyoxyethylene nonylphenol ether phosphate (5 wt% with 5 mol of ethylene oxide added, 80 wt% with 4 mol added, 10 wt with 3 mol added).
  • polyoxyethylenenonylphenol ether phosphate (3% by weight 9 mole of ethylene oxide added, 80% by weight 8 mole added, 5% by weight 9 mole added, 7 mole added 6% by weight, 6 mole added 6% by weight), polyoxyethylene nonylphenol ether phosphate (13 mole added by ethylene oxide 3% by weight, 12 mole added by 80% by weight, 11 mole added 8% by weight, 9% by weight, 3% by weight, 4% by weight, 6% by weight), polyoxyethylenenonylphenol ether phosphate (3% by weight, 17 parts by weight of ethylene oxide added, 16 parts by weight) 79 weight%, 15 mol added 10 weight%, 14 mol added 4 weight%, 13 mol added 4 weight%), polyoxyethyl Nonylphenol ether phosphate (21 wt% ethylene oxide added 5 wt%, 20 mol added 76 wt%, 19 mol added 7 wt%, 18
  • pouring of the said monomer composition is made in the temperature range of 5-60 degreeC. More preferably, it may be made in the temperature range of 21 ⁇ 40 °C.
  • the pot life can be properly maintained, and a high quality optical material can be obtained that is not deformed due to colorless transparency and finally does not generate striae or turbidity.
  • the high refractive index polyurethane-based optical lens having the highest quality may be manufactured when the temperature is 28 to 36 ° C. at the time of injection.
  • 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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Abstract

La présente invention concerne un procédé de préparation d'un matériau optique au moyen d'une injection d'une solution de monomère à base de thiouréthane dans une cavité formée entre une paire de moules dont les bords externes ont été scellés et, plus particulièrement, un procédé automatique d'injection en moule, pour un monomère destiné à un matériau optique à base de thiouréthane, permettant l'injection d'une quantité fixe en un temps court au moyen d'un système de reconnaissance visuelle pendant l'injection de la solution de monomère à base de thiouréthane à l'intérieur de la cavité. La présente invention concerne un procédé automatique d'injection en moule pour un monomère destiné à un matériau optique à base de thiouréthane comprenant les étapes consistant à : (a) préparer une composition de monomère, pour un matériau optique à base de thiouréthane, présentant un indice de réfraction de solide de 1,523 à 1,690 et une viscosité de 20 à 1 000 cps (25 °C) ; (b) injecter la majeure partie de la composition de monomère à l'intérieur d'une cavité formée entre une paire de moules dont les bords externes ont été scellés ; et (c), après l'étape (b), détecter un niveau d'huile au moyen d'un système de reconnaissance visuelle pendant l'injection de la composition de monomère à l'intérieur de la cavité et, si un niveau d'huile est détecté à un point final défini d'injection, terminer l'injection de la composition de monomère. Selon la présente invention, une quantité fixe de solution de monomère pour un matériau optique à base de thiouréthane peut être automatiquement injectée dans un moule de manière ni insuffisante, ni excessive.
PCT/KR2019/004736 2018-05-14 2019-04-19 Procédé automatique d'injection en moule pour un monomère destiné à un matériau optique à base de thiouréthane WO2019221409A1 (fr)

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CN201980032014.2A CN112188954B (zh) 2018-05-14 2019-04-19 硫代氨基甲酸酯类光学材料用单体的模具自动注入方法
JP2020562584A JP7077423B2 (ja) 2018-05-14 2019-04-19 チオウレタン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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KR10-2018-0055089 2018-05-14
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KR1020180137344A KR102522289B1 (ko) 2018-05-14 2018-11-09 티오우레탄계 광학재료용 모노머의 몰드 자동 주입방법

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Citations (5)

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JPH09254169A (ja) * 1996-03-26 1997-09-30 Toray Ind Inc プラスチック原料液注入方法および装置
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
KR20130057453A (ko) * 2010-08-12 2013-05-31 미쓰이 가가쿠 가부시키가이샤 플라스틱 편광렌즈, 그 제조 방법 및 편광필름
KR20170034835A (ko) * 2017-03-20 2017-03-29 주식회사 케이오씨솔루션 티오우레탄계 광분산용 플라스틱 렌즈 및 그 제조방법
KR20180002770A (ko) * 2015-06-15 2018-01-08 미쯔이가가꾸가부시끼가이샤 플라스틱 렌즈의 제조 방법 및 플라스틱 렌즈의 제조 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09254169A (ja) * 1996-03-26 1997-09-30 Toray Ind Inc プラスチック原料液注入方法および装置
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
KR20130057453A (ko) * 2010-08-12 2013-05-31 미쓰이 가가쿠 가부시키가이샤 플라스틱 편광렌즈, 그 제조 방법 및 편광필름
KR20180002770A (ko) * 2015-06-15 2018-01-08 미쯔이가가꾸가부시끼가이샤 플라스틱 렌즈의 제조 방법 및 플라스틱 렌즈의 제조 장치
KR20170034835A (ko) * 2017-03-20 2017-03-29 주식회사 케이오씨솔루션 티오우레탄계 광분산용 플라스틱 렌즈 및 그 제조방법

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