WO2002051609A1 - Procede de formage d'un disque optique et dispositif de moulage metallique pour le formage d'un disque optique selon ledit procede - Google Patents

Procede de formage d'un disque optique et dispositif de moulage metallique pour le formage d'un disque optique selon ledit procede Download PDF

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Publication number
WO2002051609A1
WO2002051609A1 PCT/JP2001/011361 JP0111361W WO02051609A1 WO 2002051609 A1 WO2002051609 A1 WO 2002051609A1 JP 0111361 W JP0111361 W JP 0111361W WO 02051609 A1 WO02051609 A1 WO 02051609A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
fixed
molds
movable
optical disk
Prior art date
Application number
PCT/JP2001/011361
Other languages
English (en)
Japanese (ja)
Inventor
Toshihiro Chihara
Original Assignee
Mitsubishi Materials Corporation
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 Mitsubishi Materials Corporation filed Critical Mitsubishi Materials Corporation
Priority to KR10-2003-7008518A priority Critical patent/KR20030063464A/ko
Publication of WO2002051609A1 publication Critical patent/WO2002051609A1/fr

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
    • 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
    • B29C45/2602—Mould construction elements
    • B29C45/2606—Guiding or centering means
    • 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
    • B29C45/70—Means for plasticising or homogenising the moulding material or forcing it into the mould, combined with mould opening, closing or clamping devices
    • 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
    • B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs

Definitions

  • the fixed die and the movable die are aligned by, for example, tapering the positioning ring, but when the fixed die and the movable die are opened, Due to its own weight, the fixed type and the movable type are slightly lowered, and misalignment occurs between the fixed type and the movable type.
  • the cut punch on the movable mold fits into the concave part on the fixed mold, but the fixed mold and the movable mold open. Misalignment occurs between them, and the cut punch cannot be fitted in a state where it is accurately aligned with the concave portion.
  • the formed opening hole is eccentric with respect to the entire optical disc, and burrs are formed on the punched mark of the opening hole of the optical disc, and the burrs are generated.
  • the positioning ring on the fixed mold side is slidably supported by the cavity forming member (mirror plate), and the movable ring is fixed by a compression spring.
  • a configuration has been proposed for biasing. As a result, even when the fixed mold and the movable mold are opened to some extent, the positioning rings of the fixed mold and the movable mold are tapered into each other, and the fixed mold and the movable mold are aligned.
  • the positioning ring is made slidable in this way, the positioning ring will be misaligned with respect to the cavity forming member, and the accuracy of alignment between the fixed mold and the movable mold with respect to the capital forming member will decrease. There is a possibility that.
  • the present invention is intended to solve such a problem, and it is possible to reliably and accurately align a pair of molds when they are closed, and to open the pair of molds in an open state.
  • the method of molding an optical disc according to the present invention includes the steps of: closing a first mold and a second mold to form a product cavity for forming an optical disc between the molds; and forming a material passage formed in the first mold.
  • Forming the opening of the optical disc by filling the molding material into the product cavity from the first step and fitting the gate cut member provided on the second mold into the recess formed on the first mold Gate cutting process to cut off material passages and product cavities while increasing the tightening force on both molds, and closing both molds opened by the pressure of the molding material in the product cavities, thereby reducing the product cavity.
  • the two molds are aligned in the filling step, the gate cutting step, and the compression step, and at the end of the compression step, the positioning members fixed to the mutually facing surfaces of the two mold bodies are mutually joined. Both molds are aligned by taper fitting.
  • the guide pin and the guide bin receiver are provided only at two corners of the mold body which are located substantially on a diagonal line.
  • the final alignment of the two molds is performed by the positioning member, and the alignment by the guide bin and the guide bin receiver is auxiliary. It is. Also, when both molds are opened and the molded optical disc is taken out, for example, a take-out robot is inserted into both molds. At this time, the corners where the guide pins and guide bin receivers are not formed on the molds The guide bin and guide bin receiver do not hinder the removal of the optical disk by removing the removal robot at.
  • FIG. 1 is a cross-sectional view showing one embodiment of the optical disk molding die apparatus of the present invention.
  • FIG. 2 is a sectional view of a guide bin and a guide pin receiving portion of the optical disk molding die apparatus shown in FIG.
  • FIG. 3 is a plan view of a fixed mold of the optical disk molding die apparatus shown in FIG.
  • FIG. 4 is an enlarged sectional view of the vicinity of the gate of the optical disk molding die apparatus shown in FIG. Preferred embodiment
  • the fixed mold 1 includes a fixed mold 6 and a fixed mounting plate 7 fixed to a surface of the fixed mold 6 opposite to the movable mold 2.
  • the fixed-side mounting plate 7 is mounted on a fixed-side platen of an injection molding machine (not shown).
  • 7a shown in FIG. 3 is a through hole formed in the fixed-side mounting plate 7 for passing a port for mounting to the fixed-side platen.
  • cylindrical guide bins 22 are respectively fixed to two corners of the fixed-side mounting plate 7 which are located substantially on a diagonal line.
  • a flange 23 formed on one end thereof is abutted against the fixed-side mounting plate 7, and one end of the guide bin 22 is fitted in a hole 24 formed on the fixed-side mounting plate 7.
  • auxiliary members 25 and bolts 26 are fixed by auxiliary members 25 and bolts 26.
  • the guide pin 22 projects toward the movable mold 2 along the opening and closing direction of the mold.
  • a flange-like stopper 27 is fixed to the end surface of the guide pin 22.
  • a step portion 31 is formed on the outer peripheral portion of the portion of the cavity block 17 located on the movable mold 2 side, and an annular outer ring abutment 32 is fitted into the step portion 31, and a bolt 33 It is fixed by.
  • a substantially cylindrical inner peripheral stamper holder 35 acting as a cylindrical member is fitted and fixed in a through hole 34 as a hole formed in the center of the cavity block 17. I have.
  • a stamper 36 for forming a group portion and a land portion of the optical disc is detachably mounted on the cavity 17, and the inner stamper retainer 35 is provided on the inner periphery of the stamper 36. It holds down the department.
  • Reference numeral 37 denotes a claw portion formed at the tip of the inner peripheral stamper retainer 35 for pressing the inner peripheral portion of the stamper 36.
  • the sprue bush 8 is fitted in the inner stamper retainer 35.
  • a recess 38 is formed in the end surface of the movable die 2 side of the sprue bush 8 by the fixed side bush 8a fitted on the outer peripheral side of the sprue bush 8.
  • the movable-side mold plate 41 is fixed to the movable-side receiving plate 42 by a port 45, acts as a cavity forming member, and has a substantially disk-shaped core block 46, and is fixed to the movable-side receiving plate 42 by bolts 47. In addition, it acts as a positioning member and can be almost annular. It consists of a moving side positioning ring 48.
  • the movable-side positioning ring 48 is fitted with a step 49 formed on the outer peripheral portion of a surface of the movable-side receiving plate 42 facing the fixed die 1 and with the outer peripheral side of the core block 46 to form a mold. At this stage, the core is aligned with the Couploc 46.
  • Through holes 56 and 57 are formed at two corners of the movable-side receiving plate 42 and the movable-side mounting plate 44 which are located substantially on a diagonal line.
  • a guide pin receiver 58 that fits slidably with the guide bin 22 on the fixed die 1 side along the opening and closing direction of the mold is incorporated.
  • These guide pin receivers 58 are cylindrical guide bushes 59 fitted and fixed in the through holes 56, and slide poles slidably incorporated on the inner peripheral side of the guide bush 59.
  • a guide pin 22 is always fitted on the inner peripheral side of the retainer 60.
  • the stopper 27 of the guide pin 22 prevents the retainer 60 from coming off.
  • the tip of the guide pin 22 is inserted into the through hole 57.
  • a substantially annular air blowing / inserting member 77 is fitted in a concave portion 76 formed on the surface of the fixed block 1 at the center of the core block 46, and is fixed by a port 78.
  • An air passage 79 formed in the core block 46 and the movable-side receiving plate 42 communicates with a gap between the air blowing insert 77 and the inner peripheral surface of the concave portion 76.
  • a substantially cylindrical protruding sleeve 81 is slidably fitted in the air blowing insert 77 within a predetermined range along the opening and closing direction of the mold. The protruding sleeve 81 penetrates the core block 46, and has one end located in the movable-side receiving plate 42.
  • a slide bearing 82 is interposed between the protruding sleeve 81 and the movable-side receiving plate 42. Further, the protruding sleeve 81 is urged by a spring 83 to a side opposite to the fixed mold 1.
  • Reference numeral 84 denotes a regulating plate fixed in the movable-side receiving plate 42 to regulate the sliding range of the protruding sleeve 81.
  • a substantially cylindrical gate cut sleeve 86 as a gate cut member is slidably fitted in the protruding sleeve 81 within a predetermined range along the opening and closing direction of the mold.
  • the gate cut sleeve 86 penetrates the protrusion sleeve 81 and the regulating plate 84, and a slide bearing 87 is interposed between the gate cut sleeve 86 and the protrusion sleeve 81.
  • a flange 88 formed at one end of the gate cut sleeve 86 is located closer to the movable side mounting plate 44 than the regulating plate 84. Further, the gate cut sleeve 86 is urged by a spring 89 to the side opposite to the fixed mold 1.
  • a projecting plate 91 is slidably supported by the movable-side mounting plate 44 within a predetermined range along the opening and closing direction of the mold.
  • the projecting plate 91 is urged by a spring 92 to the side opposite to the fixed mold 1.
  • a protrusion pin 93 fixed to the protrusion plate 91 is slidably fitted in the gate cut sleeve 86.
  • an interlocking pin 94 fixed to the protruding plate 91 penetrates through the flange portion 88 of the gate cut sleeve 86 and the regulating plate 84, and is abutted on the protruding sleeve 81.
  • a receiving portion 95 protruding from the flange portion 88 of the gate cut sleeve 86 penetrates the protruding plate 91 slidably.
  • a sprue 10 on the fixed mold 1 side is provided between the outer peripheral portion of the tip surface of the sprue bush 8 of the fixed mold 1 side and the outer peripheral surface of the tip face of the gate cut sleeve 86 on the movable mold 2 side.
  • a gate 96 communicating with the cavity 3 is formed. Further, by fitting the gate cut sleeve 86 into the recess 38 of the sprue bush 8, the resin as the molding material in the sprue 10 and the resin in the product cavity 3, ie, the optical disk, are cut at the gate 96. So that an opening at the center of the optical disk is formed. It has become.
  • a part of the optical disk is formed by the inner peripheral stamper retainer 35 and the outer peripheral portion of the tip surface of the sprue bush 8. Further, in the movable mold 2, a part of the optical disk is formed by the air blowing insert 77 and the protruding sleeve 81 in addition to the core block 46.
  • both the guide pins 22 of the fixed mold 1 are always fitted to the guide pin receivers 58 of the movable mold 2.
  • the fixed mold 1 and the movable mold 2 are aligned. Accordingly, the central axis of the fixed type 17 cavity block 17 and the central axis of the movable type 2 core block 46 are located on the same straight line.
  • the fixed mold 1 and the movable mold 2 are slightly moved by, for example, 0 due to the pressure of the resin filled in the product cavity 3. Open about l to 0.3 mm, and the tapered surfaces 21 and 50 of the positioning rings 19 and 48 are also slightly apart.
  • the guide pin 22 provided on the fixed mold 1 is slidably fitted in the guide bin receiver 58 provided on the movable mold 2 along the opening and closing direction of the mold.
  • the movable mold 2 are aligned, so that the fixed mold 1 and the movable mold 2 are opened and fixed even when the tapered surfaces 21 and 50 of their positioning rings 19 and 48 are separated from each other.
  • the mold 1 and the movable mold 2 can be aligned. That is, after the fixed mold 1 and the movable mold 2 are closed, the fixed mold 1 and the movable mold 2 are slightly opened in the filling step, the gate cutting step, and the compression step.
  • the fixed mold 1 and the movable mold 2 can be maintained in a state where they are accurately aligned to some extent against the gravity applied to the movable mold 2 and the movable mold 2. Therefore, when the gate cut sleeve 86 on the movable mold 2 side is fitted into the recess 38 of the fixed mold 1 in the gate cutting step, the gate cut sleeve 86 is securely and accurately fitted into the recess 38. As a result, the aperture of the optical disc is precisely In addition to this, it is possible to prevent defects such as burrs from occurring in the opening.
  • the guide pin 22 and the guide pin receiver 58 are provided, but the final alignment of the fixed die 1 and the movable die 2 is performed by the positioning rings 19 and 48, and the guide bin 22 Since the guide bin receiver 58 is auxiliary, it is sufficient if the two corners of the fixed type 1 and the movable type 2 are provided.
  • the optical disc is ejected between the fixed mold 1 and the movable mold 2 through the corner portion without the guide bin 22 and the guide pin receiver 58. By taking the robot in and out, the guide pin 22 and the guide pin receiver 58 do not hinder the removal of the optical disk.
  • the guide pin 22 protrudes from the fixed mold 1 and the guide bin receiver 58 into which the guide bin 22 is slidably fitted is provided on the movable mold 2.
  • a guide pin may be provided, and a fixed type may be provided with a guide pin receiver.
  • the guide pin 22 and the guide pin receiver 58 are two sets, but may be one set or three or more sets.

Landscapes

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

Abstract

L'invention concerne un procédé de formage d'un disque optique, comprenant les étapes consistant à monter, par une partie conique, une bague de positionnement latérale fixe, fixée à un moule fixe, sur une bague de positionnement latérale mobile, fixée à un moule mobile, pour aligner le moule fixe et le moule mobile, et à monter, de façon coulissante, une tige de guidage, montée dans le moule fixe, dans un logement de tige de guidage monté dans le moule mobile, pour aligner le moule fixe et le moule mobile. Contrairement à ce qui se passe lors d'un alignement effectué par une bague de positionnement, l'alignement se fait même lorsque le moule fixe et le moule mobile sont à l'état ouvert, le moule fixe et le moule mobile pouvant être mutuellement alignés de façon sûre et précise lorsqu'ils sont fermés, et, même quand le moule fixe et le moule mobile sont à l'état ouvert, ils peuvent être mutuellement alignés de façon relativement précise.
PCT/JP2001/011361 2000-12-25 2001-12-25 Procede de formage d'un disque optique et dispositif de moulage metallique pour le formage d'un disque optique selon ledit procede WO2002051609A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-2003-7008518A KR20030063464A (ko) 2000-12-25 2001-12-25 광디스크의 성형방법 및 이 방법에 사용하는 광디스크성형용 금형장치

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2000393546 2000-12-25
JP2000-393546 2000-12-25
JP2001043830A JP2002254480A (ja) 2000-12-25 2001-02-20 光ディスクの成形方法およびこの方法に用いる光ディスク成形用金型装置
JP2001-43830 2001-02-20

Publications (1)

Publication Number Publication Date
WO2002051609A1 true WO2002051609A1 (fr) 2002-07-04

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Application Number Title Priority Date Filing Date
PCT/JP2001/011361 WO2002051609A1 (fr) 2000-12-25 2001-12-25 Procede de formage d'un disque optique et dispositif de moulage metallique pour le formage d'un disque optique selon ledit procede

Country Status (5)

Country Link
JP (1) JP2002254480A (fr)
KR (1) KR20030063464A (fr)
CN (1) CN1492797A (fr)
TW (1) TW519511B (fr)
WO (1) WO2002051609A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008120097A (ja) * 2008-01-30 2008-05-29 Toshin Seiko:Kk プラスチック光学レンズ用射出成形金型ならびにプラスチック光学レンズの製造方法
CN101833963B (zh) * 2010-01-29 2011-09-28 东莞宏威数码机械有限公司 压模装置
CN102700063A (zh) * 2012-05-10 2012-10-03 太仓戴尔塔精密模具有限公司 一种插芯模具
CN102873194B (zh) * 2012-09-17 2014-10-22 宁波市奇精机械有限公司 洗衣机离合器安装板成型和挤光模具
IT201600076240A1 (it) * 2016-07-20 2018-01-20 Sacmi Punzone per stampi a compressione
JP7429131B2 (ja) * 2020-03-02 2024-02-07 株式会社奥村組 六角形セグメント製造用型枠

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59229327A (ja) * 1983-06-10 1984-12-22 Seikou Giken:Kk 樹脂成形用金型装置
EP0296677A1 (fr) * 1987-06-26 1988-12-28 Koninklijke Philips Electronics N.V. Dispositif de moulage par injecion pour la fabrication de disques d'information en matière plastique, et procédé de fabrication de disques d'information en matière plastique au moyen d'un dispositif de moulage par injection
JPH0292609A (ja) * 1988-09-30 1990-04-03 Sumitomo Heavy Ind Ltd 光ディスク基板成形用金型
JPH04216025A (ja) * 1990-12-15 1992-08-06 Toshiba Mach Co Ltd 射出成形用金型
JPH08155965A (ja) * 1994-12-09 1996-06-18 Seiko Giken:Kk 鰓クラッチ状型開き案内手段をもつディスク射出成形金型装置
JPH08229990A (ja) * 1995-02-23 1996-09-10 Mitsubishi Materials Corp 複数個取り金型装置
JPH08300419A (ja) * 1995-05-02 1996-11-19 Seiko Giken:Kk 射出成形用金型
JPH1170529A (ja) * 1997-08-29 1999-03-16 Seiko Giken:Kk ディスク成形用金型
JPH11300800A (ja) * 1998-04-22 1999-11-02 Nissei Plastics Ind Co 厚さの異なるディスクの製造方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59229327A (ja) * 1983-06-10 1984-12-22 Seikou Giken:Kk 樹脂成形用金型装置
EP0296677A1 (fr) * 1987-06-26 1988-12-28 Koninklijke Philips Electronics N.V. Dispositif de moulage par injecion pour la fabrication de disques d'information en matière plastique, et procédé de fabrication de disques d'information en matière plastique au moyen d'un dispositif de moulage par injection
JPH0292609A (ja) * 1988-09-30 1990-04-03 Sumitomo Heavy Ind Ltd 光ディスク基板成形用金型
JPH04216025A (ja) * 1990-12-15 1992-08-06 Toshiba Mach Co Ltd 射出成形用金型
JPH08155965A (ja) * 1994-12-09 1996-06-18 Seiko Giken:Kk 鰓クラッチ状型開き案内手段をもつディスク射出成形金型装置
JPH08229990A (ja) * 1995-02-23 1996-09-10 Mitsubishi Materials Corp 複数個取り金型装置
JPH08300419A (ja) * 1995-05-02 1996-11-19 Seiko Giken:Kk 射出成形用金型
JPH1170529A (ja) * 1997-08-29 1999-03-16 Seiko Giken:Kk ディスク成形用金型
JPH11300800A (ja) * 1998-04-22 1999-11-02 Nissei Plastics Ind Co 厚さの異なるディスクの製造方法

Also Published As

Publication number Publication date
CN1492797A (zh) 2004-04-28
JP2002254480A (ja) 2002-09-11
TW519511B (en) 2003-02-01
KR20030063464A (ko) 2003-07-28

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