WO2000007793A1 - Procede de fabrication d'un produit plastique en forme de plaque a protuberances superficielles - Google Patents

Procede de fabrication d'un produit plastique en forme de plaque a protuberances superficielles Download PDF

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Publication number
WO2000007793A1
WO2000007793A1 PCT/JP1998/003507 JP9803507W WO0007793A1 WO 2000007793 A1 WO2000007793 A1 WO 2000007793A1 JP 9803507 W JP9803507 W JP 9803507W WO 0007793 A1 WO0007793 A1 WO 0007793A1
Authority
WO
WIPO (PCT)
Prior art keywords
molding
plastic material
molding die
mold
die
Prior art date
Application number
PCT/JP1998/003507
Other languages
English (en)
Japanese (ja)
Inventor
Kashichi Hirota
Junji Fukuda
Original Assignee
Kyowa Electric & Chemical Co., Ltd.
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
Priority to JP9098745A priority Critical patent/JP2965526B2/ja
Application filed by Kyowa Electric & Chemical Co., Ltd. filed Critical Kyowa Electric & Chemical Co., Ltd.
Priority to PCT/JP1998/003507 priority patent/WO2000007793A1/fr
Publication of WO2000007793A1 publication Critical patent/WO2000007793A1/fr
Priority to US09/760,162 priority patent/US6858165B2/en

Links

Classifications

    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • 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
    • 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
    • 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
    • B29L2011/005—Fresnel lenses

Definitions

  • the present invention relates to a method for manufacturing a thin plastic article made of a plastic material.
  • the present invention is suitable for, but not limited to, a method for producing a Fresnel lens diffuser suitable for use in a screen plate for a projection television.
  • a production television has a configuration shown in FIG. That is, the image projected from the image projection tube 1 is reflected by the mirror 2 and forms an image on the screen plate 3.
  • the screen plate 3 includes a Fresnel lens 4, a diffusion plate 5, and a protection plate 6, as shown in FIG.
  • the diffusion plate 5 has a configuration in which a large number of mountain-shaped ridges 7 extending in the vertical direction are formed in parallel on both sides.
  • the protection plate 6 is formed of a transparent plastic plate.
  • the chevron ridges 7 of the diffusion plate 5 have a lens effect in addition to the diffusion effect, and have an effect of expanding the projected image in the horizontal direction.
  • the protection plate 6 protects the diffusion surface of the diffusion plate 5 from scratches and dust.However, since the protection plate 6 is a transparent plate having a smooth surface, the surrounding lighting equipment is projected to make it difficult to view the image. I do. Therefore, the surface exposed on the front side of the protective plate 6 is preferably a matte surface having fine irregularities.
  • the surface opposite to the diffusion surface of the diffusion plate 5 may be configured as the matte surface, and the matte surface may be exposed to the front side.
  • the Fresnel lens 4, the diffusion plate 5, and the protection plate 6, which are the components of the screen plate 3 of this kind, are formed by molding a plastic material from the viewpoint of cost and weight. It is not easy to form a sheet-like article having a fine uneven pattern on the surface by molding a plastic material.
  • An object of the present invention is to provide a method of manufacturing a Fresnel lens diffusion plate used for a screen plate for a projection television, and other thin plate-shaped plastic material articles having irregularities on the surface. I do.
  • the present invention provides a method of manufacturing a thin plate-like article formed with a protruding force so as to be distributed over at least substantially the entire surface on one side by molding a plastic material.
  • the method according to the first aspect of the present invention comprises: a first mold having a first mold surface for molding; and a first mold having a first mold surface.
  • the first molding die having a capacity of 1 can be formed, and can be fitted to a pre-molding die having an injection port of a plastic material into the molding cavity and the first molding die.
  • a mold cavity having a second volume smaller than the first volume can be formed in accordance with the condition, and a second mold having a second mold surface facing the mold cavity is prepared. .
  • the first molding die and the preliminary molding die are combined, and the first volume molding cavity formed between the first molding die and the preliminary molding die is melted from the injection port.
  • the plastic material injected in the first step is compressed in the molding cavity of the second volume, and the first molding surface and the second molding surface are formed. This is achieved by molding a plastic material between them.
  • a first mold having a first mold surface for molding and a first mold that can be fitted to the first mold are formed.
  • a second molding die having a second molding surface facing the molding cavity.
  • the plastic material in a fluid state is supplied to a plurality of portions of the first molding surface of the first molding die to supply the plastic material.
  • the plastic material is diffused to the first mold surface by fluidity.
  • the molding cavity is formed by matching the second molding die with the first molding die, and the plastic material previously filled in the molding cavity is cured while being compressed.
  • the plastic material in a flowable state is placed on the first mold surface of the first mold.
  • the second molding is performed.
  • the mold is matched with the first mold to form a molding cavity, and the plastic material previously filled in the molding cavity is cured while being compressed.
  • a plastic material supply station a first molding station provided adjacent to a side of the plastic material supply station, and a plastic material supply station located at a position different from the first molding station.
  • a second molding station provided adjacent to the supply station; and a second molding station provided in association with each of the first molding station and the second molding station, for establishing a connection between the associated molding station and the plastic material supply station.
  • a movable first mold having a first mold surface, and a first molding station and a second molding station are provided at each of the first molding station and the second molding station.
  • Molding cavities can be formed in accordance with the molding dies, and molding facing molding cavities A second mold having a second mold surface and an elongated nozzle provided at a plastic material supply station are used. Then, first, the first molding die associated with the first molding station is moved to the plastic material supply station, and the plastic material in a fluid state is placed on the first molding surface of the first molding die. The plastic material is diffused on the first molding surface by relatively laterally moving the nozzle and the first molding die without force to supply linearly through the elongated nozzle of the supply station and the nozzle, Next, the first molding die associated with the first molding station is moved to the first molding station, and the second molding die provided at the first molding station is moved to the first molding stage.
  • FIG. 1 is a cross-sectional view showing a schematic configuration of a conventional general projection television.
  • FIGS. 2A and 2B show a screen plate of a conventional production television.
  • FIG. 2A is a cross-sectional view showing the whole
  • FIG. 2A is a plan view of a part thereof
  • FIG. 3A and 3B show an example of a diffusion plate used for the screen plate of the present invention.
  • FIG. 3A is a partially enlarged plan view
  • FIG. 3B is a perspective view.
  • FIG. 4A and 4B show another embodiment of the diffusion plate used for the screen plate of the present invention.
  • FIG. 4A is a partially enlarged plan view
  • FIG. 4B is a perspective view.
  • FIG. 5 is a sectional view of an embodiment of the screen plate of the present invention.
  • FIGS. 6A and 6B show a process of manufacturing a diffusion plate used for the screen plate of the present invention, wherein FIG. 6A shows a first process and) shows a second process.
  • FIGS. 7A and 7B show another embodiment of the method of the present invention, wherein FIG. 7A is a plan view of an apparatus used for the method, and FIG.
  • FIG. 8 is a plan view showing an example of an apparatus used in a method of a modified example of the embodiment shown in FIG. 7.
  • FIG. 9 shows still another embodiment of the present invention. Is a plan view of the device used in (1), and () is a side view in partial section.
  • FIG. 10 is a side view of a molding apparatus showing still another embodiment of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
  • FIGS. 3 (a) and 3 (b) show an example of a diffusion plate manufactured by the method of the present invention.
  • the diffusion plate 5 has square pyramid-shaped projections 5a arranged vertically and horizontally. Is formed.
  • the quadrangular pyramid-shaped projections 5b can be arranged diagonally. It is preferable that the surface of the diffusion plate 5 opposite to the surface having the protrusions 5a and 5b be an opaque surface.
  • FIG. 5 shows an example of a screen plate using a diffusion plate manufactured by the method of the present invention.
  • the diffusion plate 5 is arranged with the surface having the projections 5 a facing the lens surface of the Fresnel lens 4. It is fixed to the Fresnel lens 4 by bonding or the like. The same applies to the diffusion plate 5 having the projection 5b.
  • the arrow indicates the visual direction.
  • FIG. 6 shows a method according to the first embodiment of the present invention for manufacturing the diffusion plate 5 used for the above-mentioned screen plate by molding a plastic material.
  • the mold to be formed is an upper mold having a concave portion 6a for pre-molding, that is, a pre-molding die 6, a lower mold 7 having a concave portion 7a for molding having a molding surface, and a molding having a molding surface.
  • a gate 6b for injecting a molten plastic material is formed in the center of the preforming die 6, and a cylinder 9 for injecting a plastic material is arranged in the gate 6b.
  • the concave portion 6a of the upper die 6 for pre-molding and the convex portion 7a of the lower die 7 are configured so that a surplus region 10 is formed outside the molding region of the diffusion plate.
  • the upper mold 6 for preforming and the lower mold 7 form a first volume of the cavity 11 for preforming in a state in which they are put together.
  • the upper mold 8 and the lower mold 7 for molding can be moved together from the position shown in FIG. 6 (b) in the direction of each other.
  • the cavities form 1 1 a.
  • a molding surface is formed in the molding recess 8a of the molding upper die 8.
  • the preforming cavity 11 is held between the preforming upper die 6 and the lower die 7 so that the dies 6 and 7 are held so as to be formed. Then, a molten or softened plastic material is injected from the plastic injection cylinder 9 held in the gate 6b.
  • a material methyl methacrylate, polycarbonate, polystyrene and the like can be used.
  • FIGS. 7A and 7B show another embodiment of the present invention.
  • the lower mold 7 has the same structure as in the previous embodiment.
  • the upper die has the same structure as the upper die 8 in the previous embodiment.
  • a nozzle device 12 is provided to supply the plastic material to the lower mold 7.
  • the nozzle device 12 includes a nozzle block 13, which has an X-shaped injection manifold 14 extending along two intersecting diagonals 13 a, 13 b. Is provided.
  • An injection nozzle 15 is arranged at each end of the X-shaped injection manifold 14.
  • the injection nozzle 15 has a well-known structure that is opened and closed by the shut-off pin 16.
  • the lower die 7 When manufacturing a thin plate made of plastic material, first, the lower die 7 is positioned below the nozzle device 12 with the lower die 7 separated from the upper die (not shown) by force, and the injection cylinder 17 is operated to supply the molten plastic material in a fluidized state from the injection nozzle 15 to the molding recess 7 a of the lower die 7.
  • the plastic material supplied onto the molding recess 7a of the lower mold 7 diffuses into the molding surface of the molding recess 7a of the lower mold 7 due to its fluidity.
  • the nozzle 15 is closed with the shut-off pin 16 in the closed position, the nozzle device 2 is separated from the lower die 7, and the lower die 7 is moved below the upper die, and in the same manner as in the previous embodiment, Molding is performed between the lower mold 7 and the upper mold.
  • FIG. 8 shows a modification of the embodiment of FIG.
  • the X-shaped injection manifold 14 provided in the nozzle block 13 of the nozzle device 12 has, in addition to the four nozzles 15, an X-shaped central part, that is, two Diagonal intersection
  • the nozzle 15a is further arranged in the vicinity of.
  • Other configurations are the same as those in the embodiment of FIG.
  • FIGS. 9A and 9B show still another embodiment of the present invention.
  • a nozzle device 21 is used instead of the nozzle device 12 in the embodiment of FIG.
  • the lower mold 7 and the upper mold (not shown) for molding have the same structure as those in the above-described embodiments.
  • the nozzle device 21 is provided with a nozzle 22 having an elongated slit-like discharge port 22 a, and an extrusion cylinder or an extrusion screw 23 of a plastic material is connected to the nozzle 22.
  • the nozzle device 21 and the lower mold 7 can move relatively.
  • the lower die 7 has a structure in which the lower die 7 can be moved in the lateral direction with respect to the nozzle device 21 as shown by a broken line in FIG. 9B.
  • the nozzle 22 is arranged such that the slit-shaped discharge port 22a extends in the width direction of the molding concave portion 7a of the lower molding die 7.
  • a gear pump 24 is arranged at the upper part of the nozzle 22 so as to communicate with the plastic material passage in the nozzle 22.
  • the plastic material is supplied from a discharge port 22 a of the nozzle 22 onto the molding recess 7 a of the lower die 7.
  • the lower mold 7 is relatively moved with respect to the nozzle device 21 as shown by a broken line in FIG. 9 (b). Since the plastic material is supplied linearly and is in a flowing state, it spreads in the width direction of the molding concave portion 7a of the lower die 7.
  • the plastic material is supplied so as to spread over almost the entire length of the lower mold concave portion 7 a in the length direction.
  • the operation of the extrusion cylinder or the extrusion screw 23 is stopped, and the gear pump 24 is operated to suck back the molten plastic material remaining in the nozzle 22. This can prevent the plastic material from dripping from the discharge port 22 a of the nozzle 22. Thereafter, the lower mold 7 is moved to a position below the upper mold (not shown), and the same as in the previous embodiment is performed. Perform molding.
  • FIG. 10 shows an application of the embodiment of FIG.
  • the device used in the method of this example comprises a nozzle device 21 similar to that shown in FIG.
  • a first molding station A is provided adjacent to one side of the plastic material supply station S, and a second molding station B is provided adjacent to the opposite side.
  • Each of the first and second molding stations A and B is provided with an upper die 8 movably up and down.
  • each of the first and second molding stations A and B has a lower die that can move between the first and second molding stations A and S.
  • a leveling roller 25 a that rotates in the direction of arrow a is used.
  • the leveling rollers rotating in the direction of the arrow b are arranged with a strength of 25 b.
  • the lower mold 7 associated with the first molding station A is moved downward to the nozzle device 21 of the plastic material supply station S,
  • the molten plastic material is supplied linearly to the molding surface 7a of the lower mold 7 by the same procedure as described with reference to FIG.
  • the lower mold 7 is moved in the direction of the first molding station A as shown by an arrow c in FIG. 10, and the plastic material is supplied to almost the entire molding surface 7 a of the lower mold 7. .
  • the molten plastic material supplied onto the molding surface 7a of the lower mold 7 is leveled by the leveling roller 25b rotating in the direction of arrow a.
  • the extruding cylinder or the extruding screw 23 is stopped, and the molten plastic material in the nozzle 22 is sucked back by the gear pump 24.
  • the lower mold 7 is returned to the first molding station A,
  • the upper die 8 of A is lowered to a position where the lower die 7 can be fitted, and a plastic material is molded in a molding cavity formed between the lower die 7 and the molding surface 7a.
  • the lower mold 7 of the second molding stage B is moved to the plastic material supply station S, and the plastic material in a molten state is supplied to the molding surface 7a of the lower mold 7 by the same action.
  • This method is effective in increasing the efficiency of production.
  • a plastic material article having a thin plate-like shape and having a fine concavo-convex pattern on the surface can be easily produced.
  • the method of the present invention has an effect that a Fresnel lens or a diffusion plate in which unevenness is formed on a wide flat surface can be molded without any trouble.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une plaque de diffusion utilisée comme plaque d'écran pour la projection d'images de télévision. On fabrique par moulage par injection d'un matériau plastique une plaque de diffusion comprenant sur une de ses face une multiplicité de protubérances en forme de pyramides quadrangulaires. Au cours de ce procédé on utilise une première matrice de moulage comprenant une première surface de moulage, une matrice de préformage qui, une fois assemblée à la première matrice de moulage permet de former une cavité de moule présentant un premier volume, et une seconde matrice de moulage qui permet de former une cavité de moulage présentant un second volume plus petit que le premier lorsqu'elle est assemblée à la première matrice de moulage. Ce procédé comprend les étapes suivantes: Lorsque la première matrice de moulage et la matrice de préformage sont assemblées, on injecte un matériau de plastique fondu dans la cavité de moulage présentant le premier volume, comprise entre la première matrice de moulage et la matrice de préformage, à partir d'un orifice d'injection. Une fois l'injection terminée, et avant le durcissement du matériau plastique on retire la première matrice de moulage de la matrice de préformage et on l'assemble à la seconde matrice de moulage pour effectuer la seconde étape. On comprime alors le matériau plastique qui a été injecté au cours de la première étape dans la cavité de moulage formant le second volume afin de mouler le matériau plastique entre la première surface de matrice et la seconde surface de matrice.
PCT/JP1998/003507 1997-01-13 1998-08-06 Procede de fabrication d'un produit plastique en forme de plaque a protuberances superficielles WO2000007793A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP9098745A JP2965526B2 (ja) 1997-01-13 1997-04-16 表面に突起を有する薄板状プラスチック製物品の製造方法
PCT/JP1998/003507 WO2000007793A1 (fr) 1997-01-13 1998-08-06 Procede de fabrication d'un produit plastique en forme de plaque a protuberances superficielles
US09/760,162 US6858165B2 (en) 1998-08-06 2001-01-12 Method of manufacturing plastic thin-plate article with protrusions on surface thereof

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP360897 1997-01-13
JP9098745A JP2965526B2 (ja) 1997-01-13 1997-04-16 表面に突起を有する薄板状プラスチック製物品の製造方法
PCT/JP1998/003507 WO2000007793A1 (fr) 1997-01-13 1998-08-06 Procede de fabrication d'un produit plastique en forme de plaque a protuberances superficielles

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/760,162 Continuation US6858165B2 (en) 1998-08-06 2001-01-12 Method of manufacturing plastic thin-plate article with protrusions on surface thereof

Publications (1)

Publication Number Publication Date
WO2000007793A1 true WO2000007793A1 (fr) 2000-02-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1998/003507 WO2000007793A1 (fr) 1997-01-13 1998-08-06 Procede de fabrication d'un produit plastique en forme de plaque a protuberances superficielles

Country Status (2)

Country Link
JP (1) JP2965526B2 (fr)
WO (1) WO2000007793A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003191263A (ja) * 2001-12-27 2003-07-08 Nippon Zeon Co Ltd 平板及びその製造方法
EP1818220A3 (fr) * 2006-01-31 2009-02-25 Reflex Mouldings Limited Procédé et appareil de fabrication de composants de plaque d'immatriculation
EP1774372B1 (fr) * 2004-05-10 2011-07-20 Saint-Gobain Glass France Feuille transparente texturee a motifs pyramidaux qui peut être associée à des cellules photovoltaiques
US8423111B2 (en) 2005-08-29 2013-04-16 Hitachi Medical Corporation Probe holder mounting device for biological photometric device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2965526B2 (ja) * 1997-01-13 1999-10-18 協和電機化学株式会社 表面に突起を有する薄板状プラスチック製物品の製造方法
US6858165B2 (en) 1998-08-06 2005-02-22 Kyowa Electric And Chemical Co. Ltd. Method of manufacturing plastic thin-plate article with protrusions on surface thereof
KR20030023422A (ko) * 2001-09-13 2003-03-19 최해용 원형 산란선이 중첩한 형태의 투과형 스크린과 그 제조 방법
CN103042652A (zh) * 2013-01-15 2013-04-17 黄锦泽 串珠式塑料装饰件的免抽芯成型工艺

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5967008A (ja) * 1982-10-07 1984-04-16 Sumitomo Chem Co Ltd 熱可塑性樹脂のプレス成形方法
JPS6031930A (ja) * 1983-07-29 1985-02-18 Sumitomo Chem Co Ltd 熱可塑性樹脂のプレス成形方法
JPH0185010U (fr) * 1987-11-26 1989-06-06
JPH0298416A (ja) * 1988-10-04 1990-04-10 Japan Steel Works Ltd:The プレス成形機
JPH05173253A (ja) * 1991-12-25 1993-07-13 Toppan Printing Co Ltd レンズシートの製造方法
JPH06114860A (ja) * 1992-09-30 1994-04-26 Toppan Printing Co Ltd レンズシートの製造方法
JPH10249898A (ja) * 1997-01-13 1998-09-22 Kyowa Denki Kagaku Kk 表面に突起を有する薄板状プラスチック製物品の製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5967008A (ja) * 1982-10-07 1984-04-16 Sumitomo Chem Co Ltd 熱可塑性樹脂のプレス成形方法
JPS6031930A (ja) * 1983-07-29 1985-02-18 Sumitomo Chem Co Ltd 熱可塑性樹脂のプレス成形方法
JPH0185010U (fr) * 1987-11-26 1989-06-06
JPH0298416A (ja) * 1988-10-04 1990-04-10 Japan Steel Works Ltd:The プレス成形機
JPH05173253A (ja) * 1991-12-25 1993-07-13 Toppan Printing Co Ltd レンズシートの製造方法
JPH06114860A (ja) * 1992-09-30 1994-04-26 Toppan Printing Co Ltd レンズシートの製造方法
JPH10249898A (ja) * 1997-01-13 1998-09-22 Kyowa Denki Kagaku Kk 表面に突起を有する薄板状プラスチック製物品の製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003191263A (ja) * 2001-12-27 2003-07-08 Nippon Zeon Co Ltd 平板及びその製造方法
EP1774372B1 (fr) * 2004-05-10 2011-07-20 Saint-Gobain Glass France Feuille transparente texturee a motifs pyramidaux qui peut être associée à des cellules photovoltaiques
US8423111B2 (en) 2005-08-29 2013-04-16 Hitachi Medical Corporation Probe holder mounting device for biological photometric device
EP1818220A3 (fr) * 2006-01-31 2009-02-25 Reflex Mouldings Limited Procédé et appareil de fabrication de composants de plaque d'immatriculation

Also Published As

Publication number Publication date
JPH10249898A (ja) 1998-09-22
JP2965526B2 (ja) 1999-10-18

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