JP4184091B2 - 射出成形方法 - Google Patents
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- 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
- B29C43/32—Component parts, details or accessories; Auxiliary operations
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- 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
- B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
- B29C43/06—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts
- B29C43/08—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts with circular movement, e.g. mounted on rolls, turntables
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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
- 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
- B29C2043/023—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 having a plurality of grooves
- B29C2043/025—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 having a plurality of grooves forming a microstructure, i.e. fine patterning
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
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- B29C2043/3433—Feeding the material to the mould or the compression means using dispensing heads, e.g. extruders, placed over or apart from the moulds
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
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- B29C2043/3488—Feeding the material to the mould or the compression means uniformly distributed into the mould
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C2043/3676—Moulds for making articles of definite length, i.e. discrete articles moulds mounted on rotating supporting constuctions
- B29C2043/3689—Moulds for making articles of definite length, i.e. discrete articles moulds mounted on rotating supporting constuctions on a support table, e.g. flat disk-like tables having moulds on the periphery
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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
- B29C33/34—Moulds or cores; Details thereof or accessories therefor movable, e.g. to or from the moulding station
- B29C33/36—Moulds or cores; Details thereof or accessories therefor movable, e.g. to or from the moulding station continuously movable in one direction, e.g. in a closed circuit
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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
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
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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
- 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
- B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Description
本発明における第2図〜第8図の射出成形装置を用い、製品の内径φ8mm、外径φ50mm、板厚0.4mmの円盤状の光ディスク用基板を作製した。スタンパ(7)上には内径φ12mmから外径φ48mmの範囲でトラックピッチ0.5μm、溝幅0.25μm、溝深さ70nmの螺旋状プリグルーブを設けた。
N2-Nz=1/tsin2θ1(R0cos2θ1-Rθcosθ1) ・・・(2)
sinθ=nsinθ1 ・・・(3)
式中、t=基板厚み、R0=垂直入射リターデーション、Rθ=一定角度(θ)傾けて測定したリターデーション、n=屈折率1.58であるが、本実施例においてはθ=30°として測定した。
射出工程におけるノズル先端(2)の形状を第9図のように変えた以外は、実施例1と同様の射出成形機を用い、同様な方法で射出成形を行った。ノズル先端における加熱ヒーター(20)の温度は250℃に制御した。加熱プレート(8)の温度は250℃とし、ノズルを第10図における矢印方向に移動し、シール用駒(50)のシール用駒先端部(52)を移動金型(3)の内径ピン(4)と接触させることで、ノズル内におけるシール用駒(50)を押し上げ、シール用駒(50)の外周部における樹脂流動用溝(53)を通じて溶融樹脂(23)を金型上に充填させた。このとき、移動金型(3)上に充填される流動樹脂(23)は、最終製品形状に近いものであり、スタンパの転写面(54)も平坦性を維持できることを確認した。
第14図〜第17図に示す従来成形方法を用い、実施例1と同様の樹脂を用い光ディスクを作製した。射出成形機は住友重機械工業製SD35Eを用いた。固定金型(30)および可動金型(31)の温調回路における設定温度はそれぞれ120℃とし、カットパンチ(38)やスプール(36)の温調回路は設けなかった。第15図に示す充填時におけるキャビティの開き量Tは、最終製品厚みt=0.4mmより0.4m大きい0.8mmとした。充填する樹脂温度(シリンダー加熱筒温度)は最大380℃とし、充填時間は0.04秒とした。可塑化および型締めのタイムチャ−トを第18図に示す。充填直後に15トンの型締め力を0.2秒発生させることで、第16図に示すように、圧縮転写させると同時にカットパンチ(38)を駆動させ、内径を打ち抜いた。その後、型締め力を8トンまで落とし2.9秒保持したのち、型開きおよび製品取り出しを0.4秒で行った。
第21図〜第26図は、熱可塑性樹脂材料として、ガラス転移温度140℃のポリカーボネートを用い、これにCO2ガスの超臨界流体を含有させた場合の成形方法を、模式的に表したものである。第21図〜第22図は溶融樹脂の充填工程を示すものであるが、微細な構造物が形成されたスタンパ(103)が設置された移動金型(101)は、移動テーブル(102)上に載っており、該テーブルとともに該移動金型(101)は各工程を移動する。
Claims (9)
- キャビティを形成する金型が少なくとも二つ以上の部材より構成され、可塑化装置からノズルを介して前記金型に溶融樹脂を充填させて、成形品を得る射出成形方法において、
前記金型を構成するうちの一つの部材が充填工程、プレス工程および成形品取り出し工程の少なくとも3工程以上に分かれたステージを移動し、前記充填工程で、前記可塑化装置内で溶融樹脂に圧力を加えて、前記一つの部材の閉塞されていないキャビティ内に溶融樹脂を射出することにより充填させ、その後、前記プレス工程で成形品を形成することを特徴とする射出成形方法。 - 前記閉塞されていないキャビティ内に真空中で溶融樹脂を充填させることを特徴とする請求項1記載の射出成形方法。
- 前記キャビティ内に充填された溶融樹脂に、加圧下でCO2ガスの超臨界流体を浸透させた後、前記溶融樹脂を固化して成形品を形成することを特徴とする請求項1記載の射出成形方法。
- 前記熱可塑性樹脂を固化させた後、金型圧力を開放することで前記超臨界流体をガス化し、該ガス圧力により熱可塑性樹脂の固化品を金型より離型させることを特徴とする請求項3記載の射出成形方法。
- 前記一つの部材は、射出工程では使用樹脂材料の(Tg−20)℃以上(Tg:ガラス転移温度)に加熱されたステージ上に移動し、プレス工程では(Tg+100)℃以下に加熱されたステージ上に移動することを特徴とする請求項1記載の射出成形方法。
- 前記熱可塑性樹脂の金型への充填およびプレス初期は金型温度を該熱可塑性樹脂のガラス転移温度以上にし、プレス途中から金型温度を該ガラス転移温度より低くし固化させることを特徴とする請求項1記載の射出成形方法。
- 前記可塑化装置内で樹脂を可塑化計量した後、前記金型に溶融樹脂を充填させる請求項1記載の射出成形方法。
- 前記ノズルには樹脂漏れ抑制機構が設けられており、前記可塑化装置内で樹脂を可塑化計量する間は、前記樹脂漏れ抑制機構により前記ノズルが閉塞されており、計量完了後、前記ノズルが開放されて、溶融樹脂が前記金型に充填される請求項7記載の射出成形方法。
- キャビティを形成する金型が少なくとも二つ以上の部材より構成され、可塑化装置からノズルを介して前記金型に溶融樹脂を充填させて、成形品を得る射出成形方法において、
前記金型を構成するうちの一つの部材が充填工程、プレス工程および成形品取り出し工程の少なくとも3工程以上に分かれたステージを移動し、
前記可塑化装置内で樹脂を可塑化計量した後、前記充填工程で、前記可塑化装置内で溶融樹脂に圧力を加えて、前記一つの部材の閉塞されていないキャビティ内に溶融樹脂を射出することにより充填させ、その後、前記プレス工程で成形品を形成し、
前記ノズルには樹脂漏れ抑制機構が設けられており、前記可塑化装置内で樹脂を可塑化計量する間は、前記樹脂漏れ抑制機構により前記ノズルが閉塞されており、計量完了後、前記ノズルが開放されて、溶融樹脂が前記金型に充填されることを特徴とする射出成形方法。
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PCT/JP2002/004869 WO2002094532A1 (fr) | 2001-05-22 | 2002-05-21 | Procede de moulage par injection |
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JP (1) | JP4184091B2 (ja) |
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CN100348401C (zh) * | 2002-05-22 | 2007-11-14 | 日立麦克赛尔株式会社 | 成形件,注射模塑法及装置 |
JP4264532B2 (ja) * | 2002-11-19 | 2009-05-20 | ソニー株式会社 | ディスク基板および光ディスク |
JP4569744B2 (ja) * | 2003-07-14 | 2010-10-27 | コニカミノルタホールディングス株式会社 | 光学素子の成形方法 |
JP4632657B2 (ja) * | 2003-11-20 | 2011-02-16 | 日立マクセル株式会社 | 光学部品 |
JP4030521B2 (ja) * | 2004-04-26 | 2008-01-09 | 日立マクセル株式会社 | ポリマーの表面改質方法 |
CA2567936C (en) | 2006-11-14 | 2016-01-05 | Atomic Energy Of Canada Limited | Device and method for surface replication |
US7931845B2 (en) * | 2007-05-21 | 2011-04-26 | O & D Manufacturing | Gravity injection of molding material for compression molding and related methods |
WO2009023547A2 (en) | 2007-08-14 | 2009-02-19 | Arcxis Biotechnologies | Polymer microfluidic biochip fabrication |
US8535582B2 (en) * | 2008-10-23 | 2013-09-17 | Lrm Industries International, Inc. | Method of forming a molded article by wireless control |
TW201436980A (zh) * | 2013-03-21 | 2014-10-01 | Hon Hai Prec Ind Co Ltd | 射出機供料系統 |
CN104097290A (zh) * | 2013-04-03 | 2014-10-15 | 宁波米勒模具制造有限公司 | 一种超临界流体聚合物成型织物包覆件自动化工艺 |
JP6085580B2 (ja) * | 2014-04-04 | 2017-02-22 | ダイヤモンド電機株式会社 | 内燃機関用点火コイルの製造方法 |
FR3029446B1 (fr) * | 2014-12-05 | 2017-01-13 | Plastic Omnium Cie | Moule pour la fabrication de piece en matiere plastique comportant un systeme pour realiser des orifices dans la piece |
CN104552753A (zh) * | 2014-12-16 | 2015-04-29 | 中山市亚泰机械实业有限公司 | 一种用于制作灯头的立式注塑机 |
CN107848175B (zh) * | 2015-07-22 | 2020-11-17 | 艾姆弗勒克斯有限公司 | 使用一个或多个外部传感器作为虚拟空腔传感器的注射模制方法 |
AT519256B1 (de) * | 2017-03-20 | 2018-05-15 | Ing Gottfried Steiner Dipl | Verfahren und Vorrichtung zur Herstellung von Bauteilen oder Profilen |
CN107053723B (zh) * | 2017-05-31 | 2022-11-01 | 泉州三川机械有限公司 | 一种鞋衬高效加工机 |
EP3947545A1 (en) * | 2019-03-29 | 2022-02-09 | Eastman Chemical Company | Hmi display covers having low birefringence made from low hydroxyl cellulose esters |
CN110667032B (zh) * | 2019-09-26 | 2021-10-26 | 上海珂明注塑系统科技有限公司 | 一种生产封盖用注塑设备 |
CN114953352B (zh) * | 2022-05-18 | 2023-05-05 | 武汉联塑精密模具有限公司 | 一种多规格简易伸缩节盖共模模具 |
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DE3167483D1 (en) * | 1980-09-05 | 1985-01-10 | Matsushita Electric Ind Co Ltd | A method of producing an information recording disk |
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US20040145086A1 (en) | 2004-07-29 |
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WO2002094532A1 (fr) | 2002-11-28 |
JPWO2002094532A1 (ja) | 2004-09-02 |
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