WO2013147106A1 - Outil de moulage et procédé de fabrication pour lentilles - Google Patents

Outil de moulage et procédé de fabrication pour lentilles Download PDF

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Publication number
WO2013147106A1
WO2013147106A1 PCT/JP2013/059421 JP2013059421W WO2013147106A1 WO 2013147106 A1 WO2013147106 A1 WO 2013147106A1 JP 2013059421 W JP2013059421 W JP 2013059421W WO 2013147106 A1 WO2013147106 A1 WO 2013147106A1
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WO
WIPO (PCT)
Prior art keywords
lens
mold
transfer surface
molding die
molding
Prior art date
Application number
PCT/JP2013/059421
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English (en)
Japanese (ja)
Inventor
下間剛
Original Assignee
コニカミノルタ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コニカミノルタ株式会社 filed Critical コニカミノルタ株式会社
Publication of WO2013147106A1 publication Critical patent/WO2013147106A1/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B29C2045/0027—Gate or gate mark locations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses

Definitions

  • the present invention relates to a molding die for molding a lens in a hot runner format and a method for manufacturing the lens.
  • the resin is heated to the melting temperature up to the nozzle of the injection molding machine, and the sprue part, runner part and lens part formed at the tip of the nozzle are integrated.
  • the molded product is taken out from between the molds. For this reason, it is necessary to separate the lens portion by a cut at the gate portion provided at the boundary between the runner portion and the lens portion as a post process.
  • the present invention has been made in view of the above-described background art, and an object thereof is to provide a molding die and a lens manufacturing method capable of enhancing the optical performance of the lens while adopting the hot runner format.
  • a molding die includes a first mold having a first transfer surface that molds the first optical surface of the lens, and a second transfer that molds the second optical surface of the lens.
  • a second mold having a surface, and a hot runner having a nozzle end that is disposed on the first mold side and that is close to a dividing surface of the first mold and the second mold, The resin is disposed in a supply position corresponding to a portion excluding the first and second optical surfaces of the lens along the optical axis direction.
  • the nozzle end is disposed at the supply position corresponding to the portion excluding the first and second optical surfaces of the lens, and the resin is injected along the optical axis direction. It can be prevented from remaining. Thereby, the optical performance of the lens can be enhanced while taking advantage of the hot runner format.
  • the supply position corresponds to a protrusion extended to the outside of the lens flange portion.
  • the supply position can be further separated from the first transfer surface corresponding to the lens body, The degree of freedom of the shape of the first transfer surface and the like and the degree of freedom of the hot runner shape are increased.
  • the supply position faces a thin and flat molding space portion corresponding to the protrusion, and at least one of the tip wall, the side wall, and the opposing wall of the molding space portion is a molding space portion.
  • an inclined surface whose distance increases with increasing distance from the center of the lens toward the center of the lens.
  • the supply position corresponds to the flange portion of the lens.
  • the resin can be injected through a portion corresponding to the flange portion that is used for fixing the lens or the like but does not affect the optical characteristics.
  • the supply position corresponds to a protrusion provided on the flange portion of the lens.
  • the nozzle end can be retracted by the height of the protrusion, and the degree of freedom in the arrangement and shape of the nozzle end and its base side portion is increased.
  • the diameter of the first transfer surface on the first mold side where the nozzle end is disposed is smaller than the diameter of the opposing second transfer surface, and the supply position is the first position. It corresponds to the annular zone adjacent to the outside of the transfer surface.
  • the resin can be injected through the ring zone corresponding to the diameter difference between the first transfer surface and the second transfer surface.
  • the curvature of the first transfer surface on the first mold side where the nozzle end is disposed is smaller than the curvature of the opposing second transfer surface.
  • the curvature of the transfer surface is positive for the concave and negative for the convex.
  • the degree of freedom of the arrangement and shape of the nozzle end and its base side portion is increased.
  • a method for manufacturing a lens according to the present invention includes a first mold having a first transfer surface that molds the first optical surface of the lens, and a second mold that molds the second optical surface of the lens.
  • Molding mold comprising: a second mold having a transfer surface; and a hot runner having a nozzle end disposed on the first mold side and close to a dividing surface of the first mold and the second mold The nozzle end is arranged at a supply position corresponding to a portion excluding the first and second optical surfaces of the lens and injects resin along the optical axis direction.
  • the nozzle end is arranged at the supply position corresponding to the portion excluding the first and second optical surfaces of the lens, and the resin is injected along the optical axis direction, so that the nozzle marks remain on the optical surface of the lens. Can be prevented. Thereby, the optical performance of the lens can be enhanced while taking advantage of the hot runner format.
  • FIG. 3A and 3B are a sectional view and a plan view of a lens molded by the molding die shown in FIG. It is sectional drawing which expanded the cavity periphery among the metal mold
  • 6A and 6B are a cross-sectional view and a plan view of a lens molded with a molding die according to a modification. It is a partial expanded sectional view of the shaping die of a 2nd embodiment.
  • FIG. 8A and 8B are a sectional view and a plan view of a lens molded by the molding die shown in FIG. It is a partial expanded sectional view of the shaping die of a 3rd embodiment.
  • FIG. 10 is a cross-sectional view in which the periphery of the cavity in the mold portion of FIG. 9 is further enlarged.
  • 11A and 11B are a cross-sectional view and a plan view of a lens molded with the molding die of FIG. It is a partial expanded sectional view of the shaping die of a 4th embodiment.
  • 13A and 13B are a sectional view and a plan view of a lens molded with the molding die of FIG. 14A and 14B are a cross-sectional view and a plan view of a lens molded with a molding die according to a modification.
  • the molding die 100 includes a fixed die 11, a movable die 12, a hot runner portion 20, and an ejector plate 30.
  • the fixed mold 11 is supported and fixed by a fixed plate (not shown) as a first mold.
  • the fixed mold 11 has a first transfer surface 11 a on the split surface PP side facing the movable mold 12.
  • the cooling path 11b is for flowing cooling water or the like, and is provided to prevent overheating of the fixed mold (first mold) 11 and to cool the molten resin.
  • the movable mold 12 is supported by a movable plate (not shown) as a second mold and can move forward and backward with respect to the fixed mold 11.
  • the movable mold 12 has a second transfer surface 12 a on the split surface PP side facing the fixed mold 11.
  • a cavity CV is formed between the second transfer surface 12a of the movable mold 12 and the first transfer surface 11a of the fixed mold 11 by clamping.
  • the cooling path 12b is provided to prevent overheating of the movable mold (second mold) 12 and to cool the molten resin.
  • the movable mold 12 has a plurality of second transfer surfaces 12a.
  • the fixed mold 11 also has a plurality of first transfer surfaces 11a facing the plurality of second transfer surfaces 12a.
  • the hot runner portion 20 is a portion for supplying resin to the cavity CV.
  • a front end portion of the hot runner portion 20 is embedded in the fixed mold 11, and a root portion extends behind the fixed mold 11.
  • the hot runner part 20 includes a needle 22 and a nozzle part 24.
  • a plurality of hot runner portions 20 are assembled to the fixed mold (first mold) 11 corresponding to the plurality of second transfer surfaces 12a, that is, the plurality of cavities CV.
  • the plurality of hot runner portions 20, the nozzle holding ring 23 that supports these hot runner portions 20, and the air cylinder 21 that operates these hot runner portions 20 constitute a hot runner device 120.
  • the hot runner device 120 supplies the molten resin to a plurality of cavities CV (see FIG. 1) formed between the fixed mold 11 and the movable mold 12 that are clamped.
  • the needle 22 inserted into the nozzle portion 24 is driven up and down in the AB direction by the air cylinder 21 of FIG.
  • the nozzle part 24 is provided with a heater 25 and a temperature sensor 26, and temperature control is performed independently in each nozzle part 24.
  • the needle 22 is slidably held by a guide 27, and the nozzle end 24 a that is the tip of the nozzle portion 24 is opened and closed as the needle 22 advances and retreats.
  • the gate which is an opening provided in the nozzle end 24a is opened, the molten resin led to the nozzle end 24a is injected into the cavity CV.
  • the needle 22 extends in a direction perpendicular to the dividing surface PP (movable direction of the movable mold 12), and the nozzle portion 24 also extends in a direction perpendicular to the dividing surface PP.
  • the injection direction of the molten resin from the nozzle end 24a is perpendicular to the dividing surface PP and parallel to the movable direction of the movable mold 12.
  • the ejector plate 30 is urged by a drive device (not shown) and can be moved up and down at a desired timing along the upper and lower AB directions along the axis of the molding die 100.
  • a plurality of ejector pins 31 are fixed to the ejector plate 30, and each ejector pin 31 is passed through a pin hole 12 f provided in the movable mold 12.
  • the tip of the ejector pin 31 faces the cavity CV in the illustrated state in which the fixed mold 11 and the movable mold 12 are clamped.
  • the fixed mold 11 and the movable mold 12 in the mold open state separated from each other are adjusted to a predetermined temperature in the standby state. Thereafter, the movable mold 12 is operated and raised, the fixed mold 11 and the movable mold 12 are closed, and both the molds 11 and 12 are clamped with a predetermined pressure. At this time, a cavity CV is formed between the molds 11 and 12.
  • the air cylinder 21 is operated in this state to move the needle 22 upward, the molten resin guided from the passage 28 to the nozzle end 24a is injected into the cavity CV from the gate at the tip.
  • the needle 22 moves downward and seals the nozzle end 24a.
  • the molten resin in the cavity CV is cooled by both molds 11 and 12, and the lens 10 as a molded product is obtained.
  • the lens 10 is separated from the fixed mold 11 and is attached to the movable mold 12.
  • the ejector plate 30 is raised to cause the ejector pins 31 to protrude, the lens 10 is peeled from the movable mold 12 and the release of the lens 10 is completed.
  • the lens 10 includes a main body portion 10a having an optical function and a flange portion 10b provided around the main body portion 10a.
  • the main body portion 10a has a pair of opposed first and second optical surfaces S1 and S2
  • the flange portion 10b has a pair of opposed first and second flange surfaces S3 and S4, and a flange surface S3. It has a side surface S5 connecting S4.
  • the protrusion 10c provided so as to extend to the outside of the flange portion 10b is a thin and flat portion, specifically, a rectangular plate-like portion.
  • the first and second flange surfaces S3, S4 and the like extend in parallel to the optical axis OA of the lens 10.
  • the length L of the protrusion 10c is: 2G ⁇ L ⁇ D To be.
  • the height H of the protrusion 10c is G / 2 ⁇ H ⁇ 5G To be.
  • liquidity becomes favorable.
  • the width W of the protrusion 10c is G ⁇ W ⁇ 5G To be.
  • the first optical surface S1 has a shape corresponding to the first transfer surface 11a of the fixed mold 11, and is formed by transfer of the first transfer surface 11a.
  • the second optical surface S2 has a shape corresponding to the second transfer surface 12a of the movable mold 12, and is formed by transfer of the second transfer surface 12a.
  • the first flange surface S3 is formed by transferring the third transfer surface 11c of the fixed mold 11.
  • the second flange surface S4 and the side surface S5 are formed by transferring the fourth transfer surface 12d of the movable mold 12.
  • a protrusion 10c extending radially outward from one location of the flange portion 10b corresponds to a molding space portion CV2 defined by the protrusion transfer surface 11i of the fixed mold 11 and the protrusion transfer surface 12i of the movable mold 12. Molded.
  • the nozzle end 24 a of the nozzle portion 24 communicates with the cavity CV through the protrusion transfer surface 11 i of the fixed mold 11. That is, the nozzle end 24a is disposed at the supply position SP as desired in the molding space portion CV2 corresponding to the projection 10c of the lens 10, and the molten resin is injected along the optical axis OA direction.
  • FIG. 5 is a partial enlarged cross-sectional view illustrating a modified molding die, and corresponds to FIG.
  • the shape of the protrusion transfer surface 12i of the movable mold 12 is changed.
  • the tip wall 12m and the side wall 12n are inclined surfaces that increase in distance from the center of the molding space portion CV2 toward the center of the lens 10, that is, the cavity CV, with respect to the axis AX that extends from the center of the lens 10, that is, the cavity CV.
  • the opposing wall (projection transfer surface 11i) of the projection transfer surface 12i of the movable mold 12 is not inclined but is perpendicular to the AB direction of the mold opening and closing.
  • the protrusion 10c provided on the lens 10 has a side surface 10x that is a curved inclined surface and a tip surface 10y that is a flat inclined surface.
  • the side surface 10x and the front end surface 10y are inclined surfaces whose distance increases with increasing distance from the center of the lens 10 with respect to the axis AX from the center of the protrusion 10c toward the center of the lens 10.
  • the height T2 of the portion closer to the center of the lens 10 than the height T1 of the portion away from the center of the lens 10 when viewed from the height of the tip surface 10y of the protrusion 10c. Is higher.
  • the nozzle end 24a of the flange portion 10b is a portion excluding the main body portion 10a provided with the first and second optical surfaces S1 and S2 of the lens 10.
  • the molten resin is injected along the direction of the optical axis OA, which is arranged at the supply position SP corresponding to the protrusion 10c extended outward. Therefore, it is possible to prevent nozzle traces (gate traces) from remaining on the optical surfaces S1 and S2 of the lens 10. Thereby, the optical performance of the lens 10 can be enhanced while taking advantage of the hot runner format.
  • the protrusion 10c remaining on the lens 10 can be made small, and is unlikely to be a hindrance when the lens 10 is assembled in a later step.
  • the lens 10 has already been molded in the cold runner format, it is sufficient to add the protrusion 10c, and the shape change can be minimized.
  • the lens manufacturing method using the molding die 100 incorporating the hot runner portion 20 eliminates the need for gate cutting when removing the lens 10 and eliminates waste material. Further, since the product can be cured by cooling only the lens 10, the cycle time can be shortened and the energy efficiency is good.
  • the molding die of the second embodiment is a partial modification of the molding die and the like of the first embodiment, and matters not specifically described are the same as those of the molding die and the like of the first embodiment.
  • the curvature (absolute value) of the first transfer surface 11 a of the fixed mold 11 is smaller than the curvature (absolute value) of the second transfer surface 12 a of the movable mold 12. For this reason, since the dent in the first transfer surface 11a of the fixed mold 11 becomes shallow, the degree of freedom of arrangement and shape around the nozzle end 24a of the nozzle portion 24 is increased, and the nozzle end 24a is formed on the outer edge of the first transfer surface 11a. You can get closer. Therefore, in the case of the molding die 100 of the second embodiment, the nozzle end 24 a of the nozzle portion 24 communicates with the cavity CV via the third transfer surface 11 c of the fixed die 11.
  • the molten resin is injected along the direction of the optical axis OA arranged at the supply position SP such that the nozzle end 24a faces the molding space portion CV3 corresponding to the flange portion 10b of the lens 10.
  • FIG. 8A and 8B are a sectional view and a plan view of the lens 10 obtained by the molding die 100 of FIG.
  • the pair of opposed first and second optical surfaces S1 and S2 provided on the lens 10 have shapes corresponding to the first transfer surface 11a of the fixed mold 11 and the second transfer surface 12a of the movable mold 12, respectively. Have. And since a part of flange part 10b respond
  • the molding die or the like of the third embodiment is a partial modification of the molding die or the like of the first embodiment, and matters not specifically described are the same as those of the molding die or the like of the first embodiment.
  • the curvature (absolute value) of the first transfer surface 11 a of the fixed mold 11 is larger than the curvature (absolute value) of the second transfer surface 12 a of the movable mold 12.
  • a depression 11z is formed in a part of the third transfer surface 11c of the mold 11.
  • the nozzle end 24a of the nozzle portion 24 is communicated with the molding space portion CV3 and the cavity CV through the recess 11z of the fixed die 11. That is, in the case of the present embodiment, the nozzle end 24a is separated from the dividing surface PP by the depth of the recess 11z, thereby avoiding interference between the nozzle portion 24 and the first transfer surface 11a.
  • the mold 100 of FIG. 9 increases the degree of freedom of shape, such as increasing the curvature of the first transfer surface 11a of the fixed mold 11.
  • 11A and 11B are a sectional view and a plan view of the lens 10 obtained by the molding die 100 of FIG.
  • the pair of opposed first and second optical surfaces S1 and S2 provided on the lens 10 have shapes corresponding to the first transfer surface 11a of the fixed mold 11 and the second transfer surface 12a of the movable mold 12, respectively.
  • a projection 10p that projects in the direction of the optical axis OA is formed on a part of the flange portion 10b of the lens 10. This protrusion 10p corresponds to the depression 11z of the fixed mold 11, and the top thereof becomes a trace of supply of molten resin by the nozzle portion 24.
  • the molding die or the like of the fourth embodiment is a partial modification of the molding die or the like of the first embodiment, and matters that are not particularly described are the same as the molding die or the like of the first embodiment.
  • the diameter of the first transfer surface 11 a of the fixed mold 11 is smaller than the diameter of the second transfer surface 12 a of the movable mold 12. That is, in the fixed mold 11, between the first transfer surface 11a for molding the first optical surface S1 of the lens 10 and the third transfer surface 11c for molding the first flange surface S3 of the lens 10.
  • An annular zone 11q is formed. That is, the annular zone 11q is formed adjacent to the outside of the first transfer surface 11a and has a width corresponding to the diameter difference between the first transfer surface 11a and the second transfer surface 12a.
  • a part of the annular zone 11q is a supply position SP where the nozzle end 24a is disposed.
  • 13A and 13B are a sectional view and a plan view of the lens 10 obtained by the molding die 100 of FIG.
  • the pair of opposed first and second optical surfaces S1 and S2 provided on the lens 10 have shapes corresponding to the first transfer surface 11a of the fixed mold 11 and the second transfer surface 12a of the movable mold 12, respectively.
  • the diameter of the first optical surface S1 is considerably smaller than the diameter of the second optical surface S2.
  • the first optical surface S1 is formed only in the central region of the main body portion 10a.
  • An annular surface 10q is formed around the first optical surface S1.
  • the molten resin can be injected by utilizing a part of the annular zone portion 11q that forms the annular zone surface 10q that is not optically utilized.
  • the main body portion 10a and the flange portion 10b of the lens 10 have a circular outline, but the main body portion 10a and the flange portion 10b may have a rectangular outline.
  • the elongated lens 510 may be formed by the molding die 100 illustrated in FIG.
  • the illustrated lens 510 also has a main body portion 10a and a flange portion 10b, and a protrusion 10c is provided so as to expand the flange portion 10b outward.
  • This protrusion 10 c has a trace of supply of molten resin by the nozzle portion 24.
  • the present invention can be used for various lenses. For example, since an imaging lens and a pickup lens for an optical disk require high optical performance, an expensive resin material with low birefringence is used. Therefore, if this technique is used, since a sprue and a runner are not needed, the resin material to be used can be reduced and it can produce at low cost. When the protrusion 10c is unnecessary, it can be cut in a later process or can be used for positioning with the lens holder without being cut. Further, in the case of a light diffusing lens for LED backlight, since required optical performance is relatively low, it is required to produce it at low cost. With the present invention, since the resin pressure transmission during molding is good, sufficient lens surface accuracy can be achieved even if the resin temperature and mold temperature are lowered to shorten the cycle time, and the production cost can be reduced. .
  • the nozzle portion 24 extends in a direction perpendicular to the dividing surface PP, and the injection direction of the molten resin from the nozzle end 24a is parallel to the movable direction of the movable mold 12.
  • the parallel to the movable direction is not strict, and the injection direction of the molten resin may be slightly inclined with respect to the movable direction of the movable mold 12.
  • the molding of the lens 10 having the single main body portion 10a has been described.
  • the lens 10 having the plurality of main body portions 10a is formed by the molding die 100 illustrated in FIGS. You can do it.
  • the projection transfer surface 11i which is the opposite wall of the projection transfer surface 12i of the movable mold 12, is directed toward the center of the lens 10 with respect to the axis AX from the center of the molding space portion CV3 toward the center of the lens 10. You may have the inclined surface which distance extends so that it may be.
  • the molding die 100 is a vertical mold, but the molding die 100 may be a horizontal mold.
  • the fixed mold 11 and the movable mold 12 are arranged to face each other in the horizontal direction.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention porte sur le moulage des lentilles. Elle a pour objet un outil de moulage apte à améliorer la performance optique d'une lentille même en adoptant un format de canal de carotte chauffé. Une extrémité de buse (24a) est disposée à une partie d'alimentation (SP) correspondant à une saillie (10c) qui a été prolongée jusqu'au côté extérieur d'une partie rebord (10b), qui est une partie d'une lentille (10) à l'exclusion de la partie corps principal (10a) comprenant des première et seconde surfaces optiques (S1 et S2), et l'extrémité (24a) de la buse injecte une résine fondue dans la direction de l'axe optique (OA). De cette façon, il est possible d'éviter qu'il reste une trace de buse sur les surfaces optiques (S1 et S2) de la lentille (10). De cette façon, il est possible d'améliorer la performance optique de la lentille (10) tout en bénéficiant de l'avantage du format à canal de carotte chauffé.
PCT/JP2013/059421 2012-03-29 2013-03-28 Outil de moulage et procédé de fabrication pour lentilles WO2013147106A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-077810 2012-03-29
JP2012077810 2012-03-29

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WO2013147106A1 true WO2013147106A1 (fr) 2013-10-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109664476A (zh) * 2019-01-08 2019-04-23 东莞市美光达光学科技有限公司 一种避免成型脱模时变形的光学镜片模具脱模结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1058496A (ja) * 1996-08-27 1998-03-03 Konica Corp レンズ部品製造方法及びその装置並びにレンズ部品
JPH11207790A (ja) * 1998-01-29 1999-08-03 Konica Corp 光学部品の成型方法、ホットランナー形式の金型を使用した成型機、及び光学部品
JP2008055713A (ja) * 2006-08-30 2008-03-13 Sumitomo Heavy Ind Ltd 射出成形機、金型、及び射出成形方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1058496A (ja) * 1996-08-27 1998-03-03 Konica Corp レンズ部品製造方法及びその装置並びにレンズ部品
JPH11207790A (ja) * 1998-01-29 1999-08-03 Konica Corp 光学部品の成型方法、ホットランナー形式の金型を使用した成型機、及び光学部品
JP2008055713A (ja) * 2006-08-30 2008-03-13 Sumitomo Heavy Ind Ltd 射出成形機、金型、及び射出成形方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109664476A (zh) * 2019-01-08 2019-04-23 东莞市美光达光学科技有限公司 一种避免成型脱模时变形的光学镜片模具脱模结构
CN109664476B (zh) * 2019-01-08 2024-05-28 东莞市美光达光学科技有限公司 一种避免成型脱模时变形的光学镜片模具脱模结构

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