DE102007011338A1 - Plastic-mold method for producing thick-walled visual plastic molded parts in an injection-molding process separates a component into equidistant layers with cavities of different volume and a core contour - Google Patents
Plastic-mold method for producing thick-walled visual plastic molded parts in an injection-molding process separates a component into equidistant layers with cavities of different volume and a core contour Download PDFInfo
- Publication number
- DE102007011338A1 DE102007011338A1 DE200710011338 DE102007011338A DE102007011338A1 DE 102007011338 A1 DE102007011338 A1 DE 102007011338A1 DE 200710011338 DE200710011338 DE 200710011338 DE 102007011338 A DE102007011338 A DE 102007011338A DE 102007011338 A1 DE102007011338 A1 DE 102007011338A1
- Authority
- DE
- Germany
- Prior art keywords
- contour
- plastic
- component
- core
- core contour
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0073—Optical laminates
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C2045/1682—Making multilayered or multicoloured articles preventing defects
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Die Erfindung bezeichnet ein Verfahren und eine Vorrichtung zur Herstellung dickwandiger, optischer Bauteile aus Kunststoff durch einen mehrstufigen Spritzgussprozess, bei dem ein schalenförmiger Aufbau des Bauteils von innen nach außen in einem mindestens zweistufigen Prozess erfolgt. Resultat ist ein optisch homogenes Bauteil mit deutlich höherer Präzision, als es im konventionellen Spritzgieß- oder Spritzprägeverfahren erreichbar ist.The The invention refers to a method and an apparatus for the production thick-walled, plastic optical components by a multi-stage Injection molding process in which a cup-shaped structure of Component from the inside out in an at least two-stage Process takes place. The result is an optically homogeneous component with significantly higher precision than in conventional Injection molding or injection-compression molding process achievable is.
Bei der Herstellung polymerbasierter optischer Bauteile im Spritzgießverfahren, muss in den meisten Fällen gegen die allgemeine Prozessanforderung, möglichst Bauteile mit gleicher Wanddicke zu fertigen, verstoßen werden, da die optische Funktion bei Anwendung der Bauteile in Transmission gerade durch Wanddickenunterschiede erzeugt wird. Die Wanddickenunterschiede führen jedoch zu einem unterschiedlichen Schwindungsverhalten über den Bauteilquerschnitt, was der Präzision der Bauteilkontur entgegenwirkt. Je stärker die Wandstärken bzw. die Wandstärkenunterschiede sind, desto größer ist die Gefahr von Einfallstellen und Lunkern als Folge der Volumenkontraktion beim Erstarren der Formmasse.at the production of polymer-based optical components by injection molding, must be in most cases against the general process requirement, if possible to produce components with the same wall thickness, be violated because the optical function in use the components in transmission just by wall thickness differences is produced. However, the wall thickness differences lead to a different shrinkage behavior over the Component cross section, what the precision of the component contour counteracts. The stronger the wall thicknesses or the wall thickness differences are the bigger is the risk of sink marks and voids as a result of volume contraction upon solidification of the molding compound.
Gemäß dem Stand der Technik werden, um ein Höchstmaß an Präzision bei der Abformung und homogene Materialeigenschaften zu erhalten, überwiegend Spritzprägeprozesse eingesetzt. Allerdings eignen sich diese Verfahren eher für großflächige, dünnwandige Formteile bzw. Bauteile mit einem großen Wanddi cken-Ausdehnungs-Verhältnis. Der Schwindung, welche zur Formabweichung führt, wird bei diesem Prozess durch einen Prägehub entgegengewirkt, dabei verteilt sich der entstehende der Druck gleichmäßig über die gesamte Oberfläche und somit wird neben einer hohen Präzision auch ein nur geringes Maß an inneren Spannungen erreicht. Spritzgießprozesse werden hingegen für Formteile mit kleinerem Wanddicken-Ausdehnungs-Verhältnis eingesetzt. Dem Prozess sind aber in Abhängigkeit von den gestellten Qualitätsanforderungen in Verbindung mit der Bauteilgeometrie und -dimension – speziell auch dem Volumen – Grenzen gesetzt. So kann allgemein gesagt werden, dass die erreichbare Abformgenauigkeit mit steigendem Bauteilvolumen deutlich abnimmt. Im herkömmlichen Spritzguss wird der Schwindung in der Abkühlphase durch den Nachdruck entgegengewirkt, welcher von der Plastifizierschnecke ausgeübt wird. Nachteilig hierbei ist die schlechtere Druckverteilung durch deren lokal begrenzten Ursprung. Sobald der Anguss bzw. der Anschnitt zum Formteil eingefroren ist, verliert der Nachdruck seine Wirkung. Dies bedeutet für extrem dickwandige Formteile, wie sie Gegenstand dieses Erfindungsvorschlags sind, dass sie aufgrund der sehr langsamen Abkühlung im Zentrum ungehindert weiter schrumpfen und somit entsprechend große Formabweichungen an der Oberfläche entstehen.According to the Prior art will be to the maximum Precision in the impression and homogeneous material properties to obtain predominantly injection-compression molding processes. However, these methods are more suitable for large-area, thin-walled Moldings or components with a large Wanddi cken-expansion ratio. The shrinkage, which leads to the shape deviation, is at counteracted this process by an embossing stroke, thereby the resulting pressure is evenly distributed the entire surface and thus is next to a high Precision also a low level of internal Tension achieved. By contrast, injection molding processes are being used for molded parts with a smaller wall thickness-expansion ratio used. The process, however, are dependent on the quality requirements in connection with the Component geometry and dimension - especially the volume - limits set. So it can be said in general that the achievable impression accuracy decreases significantly with increasing component volume. In the conventional Injection molding is the shrinkage in the cooling phase by counteracted the reprint, which of the plasticizing screw is exercised. The disadvantage here is the poorer pressure distribution by their localized origin. Once the sprue or the Preliminary to the molding is frozen, the reprint loses its Effect. This means for extremely thick-walled moldings, as they are the subject of this invention proposal that they are due to the very slow cooling in the center continues unhindered shrink and thus correspondingly large deviations in form arise on the surface.
In
der
Ein
weiterer mehrstufiger Herstellprozess mit dem Ziel einer präziseren
und sicher reproduzierbaren Abformung ist aus der
Aus
der
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Herstellung dickwandiger Kunststoffformteile mit optischen Funktionsflächen zu entwickeln, bei der das Bauteil – wie beispielweise eine großvolumige Linse oder ein großvolumiges Prisma – durch kurze Kühlzeiten eine optisch homogene Einheit darstellt und sich durch eine deutlich höhere Präzision gegenüber dem Stand der Technik abhebt. Zugleich sollen durch das neue Verfahren die Abnutzungserscheinungen an derartigen Formteilen verringert werden, die die bekannten Prozesse und Vorrichtungen im konventionellen Spritzgieß- und Spritzprägeverfahren verfahrensbedingt mit sich bringen.The present invention has for its object to develop a method and apparatus for producing thick-walled plastic moldings with optical functional surfaces, in which the component - such as a large-volume lens or a large-volume prism - represents by short cooling times an optically homogeneous unit and stands out by a much higher precision compared to the prior art. At the same time, the wear-and-tear phenomena on such moldings are to be reduced by the new process, which entail the known processes and devices in the conventional injection molding and injection-compression molding process.
Die
Aufgabe wird dadurch gelöst, dass das zu fertigende Bauteil
in äquidistante Schichten zerlegt wird, wobei diese äquidistanten
Schichten die optischen Konturen des Bauteils umschließen,
der durch eine Kernkontur (
Die
erste Kavität bildet die negative Form der Kernkontur (
In bevorzugter Weise werden Kunststoff aus der Gruppe der optischen Polymere wie PMMA, PC, Copolymere (COP), Cycloolefincopolymere (COC) usw. verwendet.In Preferably, plastic from the group of optical Polymers such as PMMA, PC, copolymers (COP), cycloolefin copolymers (COC) etc. used.
In überraschender Weise können durch die erfindungsgemäßen aufeinanderfolgenden Verfahrensschritte zum äquidistanten schichtweisen Aufbau von innen nach außen, dickwandige Prismen oder dickwandige, dickbauchige Linsen, ticke torische Linsen bzw. Optikkomponenten, dicke Bauteile mit zusätzlich feinstrukturierter Oberfläche bzw. große Bauteile mit hohen Ansprüchen an eine präzise Konturabformung erzeugt werden.In surprising Way can by the invention successive process steps to the equidistant layered structure from the inside out, thick-walled Prisms or thick-walled, thick-bellied lentils, thick toric lenses or optical components, thick components with additionally finely structured Surface or large components with high demands be generated on a precise Konturabformung.
Durch
Einlegen und Fixierung der erkalteten und somit formstabilen Kernkontur
(
Die
Die
Erfindung beinhaltet auch diejenigen Vorrichtungen, wie beispielsweise
mit verstellbarem Rahmen, die zur Durchführung des erfindungsgemäßen
mehrstufigen Verfahrens geeignet sind, um das Aufbringen von äquidistanten
Schichten in ihrer Ausführung der beispielhaft dargestellten
Form in
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 10048861 A1 [0004] DE 10048861 A1 [0004]
- - DE 10328315 A1 [0005] - DE 10328315 A1 [0005]
- - JP 2001191365 [0006] - JP 2001191365 [0006]
Claims (11)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710011338 DE102007011338A1 (en) | 2007-03-06 | 2007-03-06 | Plastic-mold method for producing thick-walled visual plastic molded parts in an injection-molding process separates a component into equidistant layers with cavities of different volume and a core contour |
DE202007018847U DE202007018847U1 (en) | 2007-03-06 | 2007-03-06 | Device for producing thick-walled optical plastic molded parts and thick-walled optical plastic molded part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710011338 DE102007011338A1 (en) | 2007-03-06 | 2007-03-06 | Plastic-mold method for producing thick-walled visual plastic molded parts in an injection-molding process separates a component into equidistant layers with cavities of different volume and a core contour |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007011338A1 true DE102007011338A1 (en) | 2008-09-11 |
Family
ID=39677942
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE202007018847U Expired - Lifetime DE202007018847U1 (en) | 2007-03-06 | 2007-03-06 | Device for producing thick-walled optical plastic molded parts and thick-walled optical plastic molded part |
DE200710011338 Withdrawn DE102007011338A1 (en) | 2007-03-06 | 2007-03-06 | Plastic-mold method for producing thick-walled visual plastic molded parts in an injection-molding process separates a component into equidistant layers with cavities of different volume and a core contour |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE202007018847U Expired - Lifetime DE202007018847U1 (en) | 2007-03-06 | 2007-03-06 | Device for producing thick-walled optical plastic molded parts and thick-walled optical plastic molded part |
Country Status (1)
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DE (2) | DE202007018847U1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2402140A1 (en) * | 2010-06-30 | 2012-01-04 | Automotive Lighting Reutlingen GmbH | Method for producing a plastic lens of a motor vehicle lighting device, plastic lens produced according to the method and tool for producing the plastic lens |
EP2578376A1 (en) * | 2011-10-06 | 2013-04-10 | Valeo Vision | Optical part having a core and a plurality of layers |
US8891171B2 (en) | 2010-02-01 | 2014-11-18 | Dbm Reflex Enterprises Inc. | High sag thick lens for use in an illumination apparatus |
DE102014018495A1 (en) * | 2014-12-16 | 2016-06-16 | Gebr. Krallmann Gmbh | Method for producing a multilayer plastic lens |
US9676155B2 (en) | 2013-08-05 | 2017-06-13 | Dbm Reflex Enterprises Inc. | Injection-molded thick lens |
WO2018073111A1 (en) | 2016-10-18 | 2018-04-26 | Covestro Deutschland Ag | Method for producing a plastic body suitable as a decorative element |
DE102008034153B4 (en) * | 2008-07-22 | 2019-08-29 | Engel Austria Gmbh | Process for producing optical lenses |
WO2022058222A1 (en) | 2020-09-18 | 2022-03-24 | Covestro Deutschland Ag | Multi-layer body for diffuse transillumination |
EP4245529A1 (en) | 2022-03-16 | 2023-09-20 | Covestro Deutschland AG | Transparent multilayer body with thermal or pressure-sensitive decorative layer |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6097301A (en) * | 1983-10-31 | 1985-05-31 | Konishiroku Photo Ind Co Ltd | Resin optical element and method for producing said element |
JPS62122725A (en) * | 1985-11-23 | 1987-06-04 | Matsushita Electric Works Ltd | Molding of thick-walled molded part |
DE3809969A1 (en) * | 1987-06-18 | 1989-10-05 | Ishida Kohki Seisakusho Co Ltd | Process for producing a lens |
US5523030A (en) * | 1993-04-21 | 1996-06-04 | Sola International Inc. | Method of making a moulded photochromic lens |
EP0839636A2 (en) * | 1996-11-05 | 1998-05-06 | Bridgestone Corporation | Method of manufacturing optical-use plastic products |
JP2001191365A (en) | 2000-01-14 | 2001-07-17 | Stanley Electric Co Ltd | Resin thick-walled lens and its molding method |
DE10048861A1 (en) | 2000-10-02 | 2002-04-25 | Krauss Maffei Kunststofftech | Thick-walled plastic lens molding method, involves molding a thin walled component and increasing cavity size during continued injection to produce a thick walled component |
DE10204806A1 (en) * | 2002-02-06 | 2003-08-14 | Wgb Werkzeug Und Geraetebau Kl | Injection molding thick-walled single or multi-component plastic parts involves injection of a thin walled structure prior to injection of other layers to make up a final thickness |
DE10328315A1 (en) | 2003-06-23 | 2005-01-13 | Schefenacker Vision Systems Germany Gmbh & Co. Kg | Manufacture of LED lighting unit, involves a two stage plastic moulding process to create the final form for use |
-
2007
- 2007-03-06 DE DE202007018847U patent/DE202007018847U1/en not_active Expired - Lifetime
- 2007-03-06 DE DE200710011338 patent/DE102007011338A1/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6097301A (en) * | 1983-10-31 | 1985-05-31 | Konishiroku Photo Ind Co Ltd | Resin optical element and method for producing said element |
JPS62122725A (en) * | 1985-11-23 | 1987-06-04 | Matsushita Electric Works Ltd | Molding of thick-walled molded part |
DE3809969A1 (en) * | 1987-06-18 | 1989-10-05 | Ishida Kohki Seisakusho Co Ltd | Process for producing a lens |
US5523030A (en) * | 1993-04-21 | 1996-06-04 | Sola International Inc. | Method of making a moulded photochromic lens |
EP0839636A2 (en) * | 1996-11-05 | 1998-05-06 | Bridgestone Corporation | Method of manufacturing optical-use plastic products |
JP2001191365A (en) | 2000-01-14 | 2001-07-17 | Stanley Electric Co Ltd | Resin thick-walled lens and its molding method |
DE10048861A1 (en) | 2000-10-02 | 2002-04-25 | Krauss Maffei Kunststofftech | Thick-walled plastic lens molding method, involves molding a thin walled component and increasing cavity size during continued injection to produce a thick walled component |
DE10204806A1 (en) * | 2002-02-06 | 2003-08-14 | Wgb Werkzeug Und Geraetebau Kl | Injection molding thick-walled single or multi-component plastic parts involves injection of a thin walled structure prior to injection of other layers to make up a final thickness |
DE10328315A1 (en) | 2003-06-23 | 2005-01-13 | Schefenacker Vision Systems Germany Gmbh & Co. Kg | Manufacture of LED lighting unit, involves a two stage plastic moulding process to create the final form for use |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008034153C5 (en) | 2008-07-22 | 2023-07-06 | Engel Austria Gmbh | Method of manufacturing optical lenses |
DE102008034153B4 (en) * | 2008-07-22 | 2019-08-29 | Engel Austria Gmbh | Process for producing optical lenses |
US8891171B2 (en) | 2010-02-01 | 2014-11-18 | Dbm Reflex Enterprises Inc. | High sag thick lens for use in an illumination apparatus |
EP2402140A1 (en) * | 2010-06-30 | 2012-01-04 | Automotive Lighting Reutlingen GmbH | Method for producing a plastic lens of a motor vehicle lighting device, plastic lens produced according to the method and tool for producing the plastic lens |
EP2578376A1 (en) * | 2011-10-06 | 2013-04-10 | Valeo Vision | Optical part having a core and a plurality of layers |
FR2981171A1 (en) * | 2011-10-06 | 2013-04-12 | Valeo Vision | OPTICAL PART COMPRISING A SOUL AND A PLURALITY OF LAYERS |
US9676155B2 (en) | 2013-08-05 | 2017-06-13 | Dbm Reflex Enterprises Inc. | Injection-molded thick lens |
US10144187B2 (en) | 2013-08-05 | 2018-12-04 | Dbm Reflex Enterprises Inc. | Injection molding device for thick lenses and method of manufacturing |
DE102014018495A1 (en) * | 2014-12-16 | 2016-06-16 | Gebr. Krallmann Gmbh | Method for producing a multilayer plastic lens |
WO2018073111A1 (en) | 2016-10-18 | 2018-04-26 | Covestro Deutschland Ag | Method for producing a plastic body suitable as a decorative element |
WO2022058222A1 (en) | 2020-09-18 | 2022-03-24 | Covestro Deutschland Ag | Multi-layer body for diffuse transillumination |
EP4245529A1 (en) | 2022-03-16 | 2023-09-20 | Covestro Deutschland AG | Transparent multilayer body with thermal or pressure-sensitive decorative layer |
WO2023174782A1 (en) | 2022-03-16 | 2023-09-21 | Covestro Deutschland Ag | Translucent multi-layer body with a heat- or pressure-sensitive decorative layer |
Also Published As
Publication number | Publication date |
---|---|
DE202007018847U1 (en) | 2009-06-25 |
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