WO2011069792A1 - Procédé et dispositif de fabrication d'éléments optiques - Google Patents

Procédé et dispositif de fabrication d'éléments optiques Download PDF

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Publication number
WO2011069792A1
WO2011069792A1 PCT/EP2010/067721 EP2010067721W WO2011069792A1 WO 2011069792 A1 WO2011069792 A1 WO 2011069792A1 EP 2010067721 W EP2010067721 W EP 2010067721W WO 2011069792 A1 WO2011069792 A1 WO 2011069792A1
Authority
WO
WIPO (PCT)
Prior art keywords
preform
embossing
tool
injection molding
injection
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2010/067721
Other languages
German (de)
English (en)
Inventor
Philipp Helbig
Peter Helbig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of WO2011069792A1 publication Critical patent/WO2011069792A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C45/0053—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
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • 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
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C2045/7356—Heating or cooling of the mould the temperature of the mould being near or higher than the melting temperature or glass transition temperature of the moulding material
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/38—Polymers of cycloalkenes, e.g. norbornene or cyclopentene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/04—Polymers of esters
    • B29K2033/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
    • 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

Definitions

  • the invention relates to a method for producing optical components according to the preamble of patent claim 1 and a device for carrying out this method.
  • optical components which are subject to high quality requirements, made of plastic for cost and weight reasons by injection molding.
  • the documents DE 10 2006 056 150 AI, DE 10 2006 048 230 AI and DE 11 2006 001 683 T5 describes, for example, components to which high op ⁇ tables requirements or high demands are made on the dimensional stability, such as optical fiber, Optikelement- Produce arrays, light-emitting diode housing or the like by injection molding. This method is also used for the production of lenses, cat's eyes, etc.
  • thermoplastic or du- roplastische molding material is introduced into the cavity of an injection ⁇ tool which is not completely closed to ⁇ next in a variant of the procedural ⁇ proceedings during the solidification or curing process, wherein the closing ⁇ pressure for final formation of the molding is uniform, so that on the one hand relatively large workpieces with low closing force or Make workpieces with very fine structures with high accuracy.
  • the mold cavity is completely filled, wherein the closing force is initially kept relatively low, so that the cavity pressure increasing during filling easily opens the tool.
  • the work ⁇ generating a relatively stress-free molded article is in the sequence then by continuously increasing the closing force closed and embossed.
  • This injection molding variant is used for example in the production of data carriers (DVD, CD).
  • a disadvantage of these methods is that due to the embossing process associated with the actual injection molding process, the cycle time is prolonged compared to a pure injection molding, in particular taking into account that the molding compound temperature should be kept approximately at the glass transition temperature (softening temperature) T G during the injection-compression molding To be able to perform the expression with the required accuracy, ie, the molding material must be cooled in the injection mold from the melting temperature to the Glasüberweichungstempe- rature.
  • the invention has for its object to provide a method and an apparatus for producing optical components, by the cost of sufficient component quality he ⁇ possible is possible.
  • a preform in an injection molding tool made of a thermoplastic or thermosetting molding compound is first produced by injection molding in the method for producing optical components ⁇ .
  • This preform is then formed by an embossing process in the optical component, according to the invention, the preform taken from the injection mold, cooled and then inserted into a separate embossing tool for final embossing.
  • the cooling can take place in a separate cooling station or in the embossing tool.
  • the effective cycle time for the manufacture of the optical component is especially short when the embossing tool is operated at approximately constant temperature, preferably at ⁇ glass transition temperature, thus losing no time for cooling and heating said stamping tool.
  • the embossing tool has the dimensions of the finished dimensions of the opti ⁇ cal component corresponding dimensions. Ie no shrinking dimensions are taken into account so that the construction ⁇ part can be made independent of the shrinkage with excellent quality ty.
  • the manufacturing quality can be further improved, even if in the injection mold a pre-embossing Runaway ⁇ leads is said pre-embossing requires substantially less time than the conventional injection-compression molding, so that the cycle time is extended only insignificantly.
  • the inventive method provides a quasi continu ous production ⁇ , wherein initially a first preform is formed in the injection mold and to a second, previously manufactured preform is marked ready parallel in the embossing tool. The formed first in the injection molding preform is then removed from the injection mold and inserted ⁇ placed in the pressing tool.
  • the cycle time is largely determined by the injection mold because of the injection molding cycle et ⁇ what will be longer than the embossing cycle.
  • the removal of the preform from the injection mold and the insertion into the embossing tool take place by means of a handling device , so that no manual access is required.
  • a handling device it is preferred if the method is used for the production of lenses, for example of PC, PMMA, PMMI, COC or other suitable plastics.
  • the single drawing shows a flow chart of the inventions ⁇ inventive method.
  • the lens is made in a conventional manner from a thermoplastic material, such as PC, PMMA, PMMI, COC.
  • a thermoplastic material such as PC, PMMA, PMMI, COC.
  • the predetermined material or the material mixture is first melted (plasticized) in an injection molding machine and then injected via the injection unit into the cavity of an injection molding tool.
  • This cavity of the Spritzgit ⁇ tool is designed with a certain excess, so that the shrinkage of the injection molded part is taken into account during cooling and solidification of the plastic melt.
  • the melt is acted upon by the injection unit with a pressure, so that a complete filling of the cavity is ensured.
  • the injection mold is so heated that the temperature of the plastic mass in the cavity remains well above the glass transition temperature T G.
  • This glass transition temperature is the temperature at which the plastic mass is the largest Has change in the deformability.
  • This glass transition separates the brittle, energy-elastic area from a soft, entropy-elastic (rubber-elastic) area.
  • this preform is pre-stamped in the manner described above, wherein - as already explained - either the injection mold during the injection of the plastic material is not fully ⁇ constantly kept closed or opened after filling the cavity len, so that is increased accordingly by the fol ⁇ increasing increasing the closing force of the pressure on the Formmas ⁇ se.
  • This pre-embossing takes place ⁇ but to a much lesser extent than in the conventional solutions.
  • the pre-embossing step can be dispensed with.
  • This formed by injection molding or injection compression molding preform is then men well above the glass transition temperature entnom- with comparatively high tempera ture ⁇ and then cooled in a relatively short time on the glass transition temperature T G ⁇ .
  • This cooling can be either in a separate cooling station (see solid line in the process scheme) or by direct Einle ⁇ gen this preform in a press tool.
  • the mold temperature of this press tool is provided as a ⁇ that the preform is brought to a temperature in the region of the said glass transition temperature or held.
  • the cavity of this pressing tool does not hold shrinkage dimensions but must be manufactured according to the geometry of the designed lenden optical component.
  • the post-shrinkage of the preform which already has the part weight of the finished part, is "distributed" in this embossing tool to the required part geometry.
  • This final stamping in the embossing tool can be used to produce microstructures, small facets or even matting , Process variations in injection molding, which may also affect different shrinkage, to compensate for the external embossing.
  • the workpiece is then cooled within the embossing tool or ex ⁇ tern, so that the molding compound completely aushär ⁇ Tet or solidifies.
  • the advantage of the above-described method is that the cycle time of the injection molding in the injection molding tool ⁇ can be significantly shortened compared with conventional solutions, since no cooling in the injection molding tool ⁇ must be provided to a temperature range below the glass transition temperature.
  • the injection-compression tool is always operated with a constant tool Tempe ⁇ temperature in the range of glass transition temperature, so the usual manner eliminates required heating-kuhlen- process in the tool and thus the cycle time can be reduced.
  • knockouts of the advantages of preform in the injection mold is especially in the form ⁇ share with extreme shrinkage used because of the two-stage embossing ER excellent dimensional stability is targetable.
  • the inventive method is preferably realized on ei ⁇ ner combination plant, in which the Spritzg intelligenttechnik ⁇ tool is clamped in an injection molding machine, wherein the embossing tool is clamped ⁇ in an immediate proximity to this injection molding machine embossing machine, so that the molded parts over a automatic ⁇ table formed automatic handling device when opening of the injection mold and a ⁇ can be placed in the open embossing tool. That is, the production of a preform by injection molding or injection compression molding and the final embossing of a preform previously produced by injection molding are substantially parallel to each other, wherein the cycle time of the injection molding / injection compression molding is slightly larger than the cycle time in the embossing tool.

Landscapes

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

Abstract

L'invention concerne un procédé et un dispositif de fabrication d'éléments optiques, une ébauche étant fabriquée dans un outil de moulage par injection, puis achevée par estampage dans un outil d'estampage.
PCT/EP2010/067721 2009-12-09 2010-11-18 Procédé et dispositif de fabrication d'éléments optiques Ceased WO2011069792A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009047735.7 2009-12-09
DE200910047735 DE102009047735A1 (de) 2009-12-09 2009-12-09 Verfahren und Vorrichtung zum Herstellen optischer Bauelemente

Publications (1)

Publication Number Publication Date
WO2011069792A1 true WO2011069792A1 (fr) 2011-06-16

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ID=43662045

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/067721 Ceased WO2011069792A1 (fr) 2009-12-09 2010-11-18 Procédé et dispositif de fabrication d'éléments optiques

Country Status (2)

Country Link
DE (1) DE102009047735A1 (fr)
WO (1) WO2011069792A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105058770A (zh) * 2015-09-01 2015-11-18 北京化工大学 一种快速聚合物微结构等温平板热压印工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015110180A1 (de) 2015-06-24 2016-12-29 Itz Innovations- Und Technologiezentrum Gmbh Verfahren zur Herstellung von Linsensystemen
EP3558623B1 (fr) * 2016-12-22 2024-09-04 Modi Consulting and Investments Pty Ltd Processus de moulage ayant un refroidissement couplé à une force active

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH048512A (ja) * 1990-04-27 1992-01-13 Olympus Optical Co Ltd プラスチックレンズの成形方法
JP2004066486A (ja) * 2002-08-01 2004-03-04 Nexsys Corp 細密部品の製造方法および装置
JP2006256000A (ja) * 2005-03-16 2006-09-28 Namio Nakazawa プラスチック製品の製造方法及び製造装置
JP2006327147A (ja) * 2005-05-30 2006-12-07 Fujinon Corp プラスチックレンズの成形方法およびプラスチックレンズ
DE102005037116B3 (de) * 2005-08-03 2007-01-18 Kunststoff-Prof. Ehrenstein GbR (vertretungsberechtigter Gesellschafter: Prof. Dr.-Ing. Dr.h.c. Gottfried W. Ehrenstein, 90427 Nürnberg) Verfahren zur Herstellung eines Formteils, insbesondere Spritzgießverfahren
US20080067704A1 (en) * 2004-10-18 2008-03-20 Riken Micro-Molding Equipment and Micro-Molding Method
DE102006048230A1 (de) 2006-10-11 2008-04-17 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Leuchtdiodensystem, Verfahren zur Herstellung eines solchen und Hinterleuchtungseinrichtung
DE112006001683T5 (de) 2005-06-24 2008-05-15 Idemitsu Kosan Co. Ltd. Lichtdiffusionsplatte und Beleuchtungsvorrichtung, die sie verwendet
DE102006056150A1 (de) 2006-11-28 2008-05-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Vorrichtung zur Abstrahlung elektromagnetischer Strahlung und Anzeigevorrichtung
WO2009018798A2 (fr) * 2007-08-07 2009-02-12 Docter Optics Gmbh Procédé de fabrication d'un élément lentille optique, en particulier une lentille de projecteur pour un phare de véhicule
US7691314B2 (en) * 2004-11-02 2010-04-06 Idemitsu Kosan Co., Ltd. Method of injection compression molding

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH048512A (ja) * 1990-04-27 1992-01-13 Olympus Optical Co Ltd プラスチックレンズの成形方法
JP2004066486A (ja) * 2002-08-01 2004-03-04 Nexsys Corp 細密部品の製造方法および装置
US20080067704A1 (en) * 2004-10-18 2008-03-20 Riken Micro-Molding Equipment and Micro-Molding Method
US7691314B2 (en) * 2004-11-02 2010-04-06 Idemitsu Kosan Co., Ltd. Method of injection compression molding
JP2006256000A (ja) * 2005-03-16 2006-09-28 Namio Nakazawa プラスチック製品の製造方法及び製造装置
JP2006327147A (ja) * 2005-05-30 2006-12-07 Fujinon Corp プラスチックレンズの成形方法およびプラスチックレンズ
DE112006001683T5 (de) 2005-06-24 2008-05-15 Idemitsu Kosan Co. Ltd. Lichtdiffusionsplatte und Beleuchtungsvorrichtung, die sie verwendet
DE102005037116B3 (de) * 2005-08-03 2007-01-18 Kunststoff-Prof. Ehrenstein GbR (vertretungsberechtigter Gesellschafter: Prof. Dr.-Ing. Dr.h.c. Gottfried W. Ehrenstein, 90427 Nürnberg) Verfahren zur Herstellung eines Formteils, insbesondere Spritzgießverfahren
DE102006048230A1 (de) 2006-10-11 2008-04-17 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Leuchtdiodensystem, Verfahren zur Herstellung eines solchen und Hinterleuchtungseinrichtung
DE102006056150A1 (de) 2006-11-28 2008-05-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Vorrichtung zur Abstrahlung elektromagnetischer Strahlung und Anzeigevorrichtung
WO2009018798A2 (fr) * 2007-08-07 2009-02-12 Docter Optics Gmbh Procédé de fabrication d'un élément lentille optique, en particulier une lentille de projecteur pour un phare de véhicule

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105058770A (zh) * 2015-09-01 2015-11-18 北京化工大学 一种快速聚合物微结构等温平板热压印工艺
CN105058770B (zh) * 2015-09-01 2018-06-26 北京化工大学 一种快速聚合物微结构等温平板热压印工艺

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