DE102020127982A1 - Sandwich component with fiber-reinforced duroplastic cover layers and thermoplastic foam core, and manufacturing method for such a sandwich component - Google Patents
Sandwich component with fiber-reinforced duroplastic cover layers and thermoplastic foam core, and manufacturing method for such a sandwich component Download PDFInfo
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- DE102020127982A1 DE102020127982A1 DE102020127982.5A DE102020127982A DE102020127982A1 DE 102020127982 A1 DE102020127982 A1 DE 102020127982A1 DE 102020127982 A DE102020127982 A DE 102020127982A DE 102020127982 A1 DE102020127982 A1 DE 102020127982A1
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- sandwich component
- foam core
- cover layers
- foam
- polyolefin
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- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 18
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Images
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Abstract
Die Erfindung betrifft ein Sandwichbauteil (100) mit faserverstärkten duroplastischen Decklagen (110, 120) und einem dazwischen angeordneten thermoplastischen Schaumkern (130), wobei der thermoplastische Schaumkern (130) aus einem Polyolefin-Schaumstoff gebildet ist.Die Erfindung betrifft ferner ein Herstellverfahren für ein solches Sandwichbauteil (100), das eine Druck-Wärme-Behandlung (p, T) in einem Autoklav (60) umfasst.The invention relates to a sandwich component (100) with fiber-reinforced duroplastic cover layers (110, 120) and a thermoplastic foam core (130) arranged in between, the thermoplastic foam core (130) being formed from a polyolefin foam such a sandwich component (100) comprising a pressure-heat treatment (p, T) in an autoclave (60).
Description
Die Erfindung betrifft ein Sandwichbauteil mit faserverstärkten duroplastischen Decklagen und einem dazwischen angeordneten thermoplastischen Schaumkern. Die Erfindung betrifft ferner ein Herstellverfahren für ein solches Sandwichbauteil.The invention relates to a sandwich component with fiber-reinforced duroplastic cover layers and a thermoplastic foam core arranged in between. The invention also relates to a manufacturing method for such a sandwich component.
Ein Sandwichbauteil betreffender Art weist viele Vorteile auf, wie bspw. das geringe Gewicht und die vergleichsweise hohe Belastbarkeit, weswegen sich ein solches Sandwichbauteil insbesondere für Anwendungen im Kraftfahrzeugbereich eignet.A sandwich component of this type has many advantages, such as the low weight and the comparatively high load-bearing capacity, which is why such a sandwich component is particularly suitable for applications in the motor vehicle sector.
Bei einem Sandwichbauteil betreffender Art dürfen sich die faserverstärkten duroplastischen Decklagen nicht vom thermoplastischen Schaumkern ablösen. Um dies zu erreichen, können spezielle Haftvermittler (Primer) eingesetzt werden, die bei der Herstellung des Sandwichbauteils eingebracht werden, was jedoch mit Aufwand und Kosten verbunden ist.In the case of a sandwich component of this type, the fiber-reinforced duroplastic cover layers must not become detached from the thermoplastic foam core. In order to achieve this, special adhesion promoters (primers) can be used, which are introduced during the production of the sandwich component, but this is associated with effort and costs.
Die
- - Bereitstellen eines Pressform-Werkzeugs;
- - Einlegen zumindest einer ersten Faserlage, darüber Einlegen eines Trennkörpers, und auf den Trennkörper Einlegen einer zweiten Faserlage;
- - Schließen des Werkzeugs und Injizieren eines härtbaren Kunststoff-Matrixmaterials (Harz) in die Faserlagen;
- - Injizieren eines schäumbaren Kunststoffmaterials in eine durch den Trennkörper bereitgestellte geschlossene Kavität zwischen den aushärtenden Faserverbundkunststoff-Decklagen und Initiieren eines Aufschäumprozesses.
- - providing a compression molding tool;
- - Inserting at least one first fiber layer, about inserting a separating body, and on the separating body inserting a second fiber layer;
- - Closing the tool and injecting a hardenable plastic matrix material (resin) into the fiber layers;
- - Injecting a foamable plastic material into a closed cavity provided by the separating body between the hardening fiber-reinforced plastic cover layers and initiating a foaming process.
Ausgehend von diesem Stand der Technik lag der Erfindung die Aufgabe zugrunde, ein Sandwichbauteil mit faserverstärkten duroplastischen Decklagen und thermoplastischem Schaumkern zu entwickeln, das einerseits eine besonders gute, d. h. dauerhafte und belastbare, Verbindung der Decklagen mit dem Schaumkern aufweist und das andererseits einfach und kostengünstig herstellbar ist.Based on this state of the art, the invention was based on the object of developing a sandwich component with fiber-reinforced duroplastic cover layers and a thermoplastic foam core which, on the one hand, has particularly good, d. H. has a permanent and resilient connection of the cover layers to the foam core and which, on the other hand, can be produced easily and inexpensively.
Diese Aufgabe wurde gelöst mit dem erfindungsgemäßen Sandwichbauteil des Patentanspruchs 1. Mit dem nebengeordneten Patentanspruch erstreckt sich die Erfindung auch auf ein Herstellverfahren. Zusätzliche Merkmale der Erfindung ergeben sich analog für beide Erfindungsgegenstände aus den abhängigen Patentansprüchen, der nachfolgenden Erfindungsbeschreibung (wobei dies ausdrücklich auch Merkmale einschließt, die als „beispielsweise“, „bevorzugt“, „insbesondere“ etc. beschrieben sind) und der Zeichnung.This object was achieved with the sandwich component according to the invention of patent claim 1. With the subordinate patent claim, the invention also extends to a production method. Additional features of the invention result analogously for both subjects of the invention from the dependent patent claims, the following description of the invention (which expressly also includes features that are described as "example", "preferred", "in particular" etc.) and the drawing.
Das erfindungsgemäße Sandwichbauteil ist dadurch gekennzeichnet, dass der thermoplastische Schaumkern aus einem Polyolefin-Schaumstoff gebildet ist.The sandwich component according to the invention is characterized in that the thermoplastic foam core is formed from a polyolefin foam.
Ein Polyolefin-Schaumstoff (PO-Schaumstoff) betreffender Art ist aus einem teilkristallinen Thermoplast, bevorzugt aus PP (Polypropylen) oder PE (Polyethylen), gebildet und ist insbesondere geschlossenzellig ausgebildet. Ein solcher Polyolefin-Schaumstoff wird in einem ein- oder mehrstufigen Prozess aus dem Basispolymer (bspw. PP oder PE) durch physikalisches oder chemisches Aufschäumen hergestellt, wobei gegebenenfalls in einem eigenen Prozessschritt noch eine Vernetzung erfolgt (vernetzter PO-Schaumstoff). Ein solcher Polyolefin-Schaumstoff verfügt über eine hohe Elastizität, eine gute Temperaturbeständigkeit, eine gute Witterungsbeständigkeit und sehr gute Isoliereigenschaften, was insbesondere für bestimmte Anwendungen im Kraftfahrzeugbereich (s. u.) vorteilig ist. Ferner ist ein solcher Polyolefin-Schaumstoff (sowohl vernetzt als auch unvernetzt) vergleichsweise günstig als leicht weiterverarbeitbares Halbzeug verfügbar.A polyolefin foam (PO foam) of this type is formed from a partially crystalline thermoplastic, preferably from PP (polypropylene) or PE (polyethylene), and is in particular formed with closed cells. Such a polyolefin foam is produced from the base polymer (e.g. PP or PE) in a one- or multi-stage process by physical or chemical foaming, with crosslinking optionally taking place in a separate process step (crosslinked PO foam). Such a polyolefin foam has high elasticity, good temperature resistance, good weather resistance and very good insulating properties, which is advantageous in particular for certain applications in the motor vehicle sector (see below). Furthermore, such a polyolefin foam (both crosslinked and non-crosslinked) is available comparatively cheaply as a semi-finished product that can be easily further processed.
Im Rahmen der Erfindung ist bevorzugt vorgesehen, dass der Schaumkern bzw. der Polyolefin-Schaumstoff keine Verstärkungsfasern enthält, also faserfrei ist. Insbesondere ist vorgesehen, dass der Schaumkern bzw. der Polyolefin-Schaumstoff aus einem Recycling-Material gebildet ist, sodass das erfindungsgemäße Sandwichbauteil, zumindest hinsichtlich seines Schaumkerns, bedingt nachhaltig ist.In the context of the invention, it is preferably provided that the foam core or the polyolefin foam does not contain any reinforcing fibers, ie is fiber-free. In particular, it is provided that the foam core or the polyolefin foam is formed from a recycling material, so that the sandwich component according to the invention is partially sustainable, at least with regard to its foam core.
Bevorzugt sind die Decklagen des erfindungsgemäßen Sandwichbauteils aus einem mit endlosen Glas-, Natur- oder Kohlenstofffasern verstärkten Kunststoff mit einem Harzmaterial (genau genommen handelt es sich dabei um ein Harzsystem), insbesondere einem Epoxidharz, als Kunststoff-Matrixmaterial gebildet. Die endlosen Glas-, Natur- oder Kohlenstofffasern sind bevorzugt als flächiges Gewebe, Geflecht oder dergleichen angeordnet, insbesondere in mehreren Schichten. Bevorzugt weist das Harzmaterial einen sogenannten Toughener auf, der als Zähigkeits-Modifier fungiert. Dadurch besitzt das duroplastische Harzmaterial eine verbesserte Schlagzähigkeit und ist weniger spröde. Dies hat im Weiteren auch einen positiven Effekt auf die Verbindungsstabilität (d. h. Belastbarkeit und Haltbarkeit) zwischen den Decklagen und dem Schaumkern bei thermischen Wechselbelastungen, insbesondere als Folge von Witterungseinflüssen. Als Toughener wird insbesondere ein Kautschuk-Anteil (bspw. EPDM) oder ein Thermoplast-Anteil eingesetzt.The cover layers of the sandwich component according to the invention are preferably formed from a plastic reinforced with endless glass, natural or carbon fibers with a resin material (strictly speaking, it is a resin system), in particular an epoxy resin, as the plastic matrix material. The endless glass, natural or carbon fibers are preferably arranged as a flat fabric, mesh or the like, in particular in several layers. The resin material preferably has what is known as a toughener, which acts as a toughness modifier. As a result, the thermosetting resin material has improved impact resistance and is less brittle. This also has a positive effect on the stability of the connection (ie load capacity and durability) between the cover layers and the foam core in the event of alternating thermal loads, in particular as a result of weather influences. A rubber component (e.g. EPDM) or a thermoplastic component is used in particular as a toughener.
Insbesondere ist vorgesehen, dass die Verbindung zwischen den faserverstärkten duroplastischen Decklagen und dem thermoplastischen Schaumkern, zumindest im Wesentlichen, auf einem Formschluss bzw. Mikro-Formschluss zwischen einer offenzelligen bzw. offenporigen Schaumkernoberfläche (insbesondere bei ansonsten geschlossenzelliger Ausbildung des Schaumkerns bzw. des Polyolefin-Schaumstoffs) und dem Harzmaterial (bzw. dem Harzsystem) der Decklagen basiert. Hierbei handelt es sich um eine dauerhafte und sehr belastbare Verbindung. Ein ungehärtetes flüssiges Harzmaterial, insbesondere ein flüssiges Epoxidharz, ist im erwärmten Zustand sehr dünnflüssig und kann daher sehr gut in eine offenporige Schaumkernoberfläche bzw. Polyolefin-Schaumstoffoberfläche eindringen, insbesondere infolge von Kapillareffekten, wobei dies auch durch Druckbeaufschlagung begünstigt werden kann. Insbesondere ist eine chemische Verbindung zwischen den Decklagen und dem Schaumkern nicht vorgesehen, sodass die oben beschriebenen Haftvermittler (Primer) nicht erforderlich sind.In particular, it is provided that the connection between the fiber-reinforced duroplastic cover layers and the thermoplastic foam core is, at least essentially, based on a form fit or micro-form fit between an open-cell or open-pored foam core surface (in particular with an otherwise closed-cell design of the foam core or the polyolefin foam ) and the resin material (or the resin system) of the cover layers. This is a permanent and very resilient connection. An uncured liquid resin material, in particular a liquid epoxy resin, is very thin when heated and can therefore penetrate very well into an open-pored foam core surface or polyolefin foam surface, in particular as a result of capillary effects, which can also be promoted by pressurization. In particular, a chemical bond between the cover layers and the foam core is not intended, so that the adhesion promoters (primers) described above are not required.
Die faserverstärkten duroplastischen Decklagen des erfindungsgemäßen Sandwichbauteils können eine Dicke von 0,2 mm bis 1,0 mm aufweisen. Der aus einem Polyolefin-Schaumstoff gebildete Schaumkern kann eine Dicke von 1,0 mm bis 10,0 mm aufweisen.The fiber-reinforced duroplastic cover layers of the sandwich component according to the invention can have a thickness of 0.2 mm to 1.0 mm. The foam core formed from a polyolefin foam can have a thickness of 1.0 mm to 10.0 mm.
Bei dem erfindungsgemäßen Sandwichbauteil handelt es sich insbesondere um ein drei-dimensional geformtes flächiges bzw. schalenartiges Außenhautbauteil für ein Kraftfahrzeug.The sandwich component according to the invention is in particular a three-dimensionally shaped, flat or shell-like outer skin component for a motor vehicle.
Das erfindungsgemäße Sandwichbauteil ist bevorzugt in einem Autoklav-Prozess gefertigt, wie nachfolgend näher erläutert.The sandwich component according to the invention is preferably manufactured in an autoclave process, as explained in more detail below.
Das erfindungsgemäße Verfahren zur Herstellung eines Sandwichbauteils mit faserverstärkten duroplastischen Decklagen und einem dazwischen angeordneten thermoplastischen Schaumkern umfasst zumindest die folgenden Schritte:
- - Erzeugen eines (dem herzustellenden Sandwichbauteil entsprechenden) Lagenaufbaus durch Ablegen wenigstens eines Prepreg-Zuschnitts, der eine der Decklagen bildet, darüber Ablegen eines zugeschnittenen Polyolefin-Schaumstoffs bzw. eines Polyolefin-Schaumstoff-Zuschnitts, der den Schaumkern bildet, und darüber Ablegen wenigstens eines Prepreg-Zuschnitts, der die andere Decklage bildet;
- - Einlegen des Lagenaufbaus in ein formgebendes Werkzeug, wobei der Lagenaufbau auch direkt in diesem Werkzeug erzeugt werden kann, und gegebenenfalls Abdecken mit einem Werkzeugoberteil oder einer Membran (s. u.);
- - Einbringen des Werkzeugs (zusammen mit dem Lagenaufbau) in einen Autoklav (beheizbarer Druckbehälter) und Ausführen einer Druck-Wärme-Behandlung (Autoklav-Prozess), wobei das in den Prepreg-Zuschnitten enthaltene duroplastische Kunststoff-Matrixmaterial schmilzt, sich mit dem Polyolefin-Schaumstoff bzw. dem Polyolefin-Schaumstoff-Zuschnitt verbindet, insbesondere formschlüssig verbindet (s. o.), und aushärtet;
- - Öffnen des Autoklavs, Entnehmen des Werkzeugs und Entformen des Sandwichbauteils, nachdem die Druck-Wärme-Behandlung abgeschlossen ist.
- - Creating a layer structure (corresponding to the sandwich component to be produced) by depositing at least one prepreg blank, which forms one of the cover layers, depositing a cut-to-size polyolefin foam or a polyolefin foam blank, which forms the foam core, and depositing at least one above it prepreg blank forming the other skin layer;
- - Insertion of the layer structure in a shaping tool, wherein the layer structure can also be produced directly in this tool, and optionally covering with a tool upper part or a membrane (see below);
- - Insertion of the tool (together with the layer structure) in an autoclave (heatable pressure vessel) and execution of a pressure-heat treatment (autoclave process), whereby the duroplastic plastic matrix material contained in the prepreg blanks melts, fuses with the polyolefin foam or the polyolefin foam blank connects, in particular connects in a form-fitting manner (see above), and hardens;
- - Opening the autoclave, removing the mold and demolding the sandwich component after the pressure-heat treatment is completed.
Bei dem verwendeten Prepreg-Material handelt es sich um ein mit duroplastischem Kunststoff-Matrixmaterial, bevorzugt mit einem (ungehärteten) Harzmaterial, insbesondere mit einem (ungehärteten) Epoxidharz, vorimprägniertes Faserhalbzeug. Bevorzugt handelt es sich um ein nasses bzw. klebriges Prepreg-Material. Bei den enthaltenen Fasern bzw. Verstärkungsfasern handelt es sich bevorzugt um endlose Glas-, Natur- oder Kohlenstofffasern (GFK-, NFK- oder CFK-Prepreg), die insbesondere als flächiges Gewebe, Geflecht oder dergleichen angeordnet sind. Das Prepreg-Material bzw. Faserhalbzeug wird entsprechend zugeschnitten. Zur Ausbildung einer oder beider Decklagen können jeweils auch mehrere Zuschnitte nebeneinander und/oder übereinandergelegt werden (bspw. bis zu zehn Schichten). Bei dem Polyolefin-Schaumstoff handelt es sich bevorzugt ebenfalls um ein Halbzeug (s. o.), welches entsprechend zugeschnitten wird. Für die erfindungsgemäße Herstellung können somit ausschließlich vorgefertigte Halbzeuge bzw. Komponenten verwendet werden, was eine einfache und kostengünstige Herstellung ermöglicht.The prepreg material used is a semi-finished fiber product pre-impregnated with a duroplastic plastic matrix material, preferably with an (uncured) resin material, in particular with an (uncured) epoxy resin. It is preferably a wet or sticky prepreg material. The contained fibers or reinforcing fibers are preferably endless glass, natural or carbon fibers (GRP, NRP or CRP prepreg), which are arranged in particular as a flat fabric, mesh or the like. The prepreg material or semi-finished fiber product is cut accordingly. To form one or both cover layers, several cuts can also be placed next to and/or on top of each other (e.g. up to ten layers). The polyolefin foam is preferably also a semi-finished product (see above), which is cut to size accordingly. Thus, only prefabricated semi-finished products or components can be used for the production according to the invention, which enables simple and inexpensive production.
Das formgebende Werkzeug weist zumindest ein (steifes) Werkzeugunterteil mit wenigstens einer formgebenden Kavität oder dergleichen, in der der Lagenaufbau abgelegt wird, auf. Das Werkzeug kann ferner ein (steifes) Werkzeugoberteil oder eine flexible Membran aufweisen, welches/welche im Autoklav (insbesondere in Folge des Drucks) den Lagenaufbau in die Kavität drückt bzw. gegen die Kavitätswandung presst und dabei komprimiert bzw. verdichtet.The shaping tool has at least one (rigid) lower tool part with at least one shaping cavity or the like, in which the layer structure is placed. The tool can also have a (rigid) upper tool part or a flexible membrane, which in the autoclave (particularly as a result of the pressure) presses the layered structure into the cavity or against the cavity wall, thereby compressing or densifying it.
Bevorzugt erfolgt die Druck-Wärme-Behandlung im Autoklav bei einer Temperatur, die niedriger ist als die Schmelztemperatur des Polyolefin-Schaumstoffs. Die verwendeten Komponenten sind also derart aufeinander abgestimmt, dass die Aushärtetemperatur des duroplastischen Kunststoff-Matrixmaterials (wobei es sich insbesondere um ein Epoxid-Harzsystem handelt) niedriger ist, insbesondere deutlich niedriger ist (bspw. um mindestens 10 K niedriger), als die Schmelztemperatur des Polyolefin-Schaumstoffs. Die Druck-Wärme-Behandlung im Autoklav erfolgt vorzugsweise bei einer Temperatur von 120°C bis 150°C, bevorzugt bei ca. 130°C und insbesondere bei 130°C.The pressure-heat treatment in the autoclave preferably takes place at a temperature which is lower than the melting temperature of the polyolefin foam. The components used are therefore matched to one another in such a way that the curing temperature of the duroplastic plastic matrix material (which is in particular an epoxy resin system) is lower, in particular significantly lower (e.g. at least 10 K lower), than the melting temperature of the polyolefin foam. The pressure-heat treatment in the autoclave is preferably carried out at a temperature of 120°C to 150°C, preferably at approx. 130°C and in particular at 130°C.
Bevorzugt erfolgt die Druck-Wärme-Behandlung im Autoklav bei einem Druck von 5 bar bis 10 bar, insbesondere von 6 Bar bis 8 bar. Diese Druckbereiche begünstigen eine formschlüssige Verbindung zwischen den Decklagen und dem Schaumkern (s. o.).The pressure-heat treatment in the autoclave is preferably carried out at a pressure of from 5 bar to 10 bar, in particular from 6 bar to 8 bar. These pressure areas favor a positive connection between the cover layers and the foam core (see above).
Bevorzugt dauert die Druck-Wärme-Behandlung im Autoklav mehrere Stunden, insbesondere zwischen einer Stunde und drei Stunden (1 bis 3 Std.). Bei entsprechender Größe des Druckbehälters kann auch eine gleichzeitige Druck-Wärme-Behandlung für mehrere Sandwichbauteile durchgeführt werden, wodurch die Ausbringung erhöht wird und Energiekosten eingespart werden.The pressure-heat treatment in the autoclave preferably lasts several hours, in particular between one hour and three hours (1 to 3 hours). With an appropriate size of the pressure vessel, a simultaneous pressure-heat treatment can also be carried out for several sandwich components, which increases the output and saves energy costs.
Beim Erzeugen des Lagenaufbaus können auch zwei Zuschnitte eines Polyolefin-Schaumstoffs bzw. zwei Polyolefin-Schaumstoff-Zuschnitte übereinandergelegt werden, die den Schaumkern bilden. Die Zuschnitte verbinden sich dann während des Autoklav-Prozesses durch die Wärme- und Druckeinwirkung, wobei die Zuschnitte quasi miteinander „verbacken“.When creating the layer structure, two cuts of a polyolefin foam or two polyolefin foam cuts can also be placed one on top of the other, which form the foam core. The blanks then connect during the autoclave process through the effects of heat and pressure, with the blanks virtually "baking" together.
Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Die in den Figuren der Zeichnung gezeigten und/oder nachfolgend erläuterten Merkmale können, auch unabhängig von bestimmten Merkmalskombinationen, allgemeine Merkmale der Erfindung sein und die Erfindung entsprechend weiterbilden.
-
1 zeigt schematisch (nicht maßstabsgerecht) die Abfolge eines erfindungsgemäßen Verfahrens zur Herstellung eines Sandwichbauteils mit faserverstärkten duroplastischen Decklagen und thermoplastischem Schaumkern. -
2 zeigt analog zur1 eine andere Ausführungsmöglichkeit des erfindungsgemäßen Verfahrens.
-
1 shows schematically (not to scale) the sequence of a method according to the invention for producing a sandwich component with fiber-reinforced duroplastic cover layers and a thermoplastic foam core. -
2 shows analogous to1 another possible embodiment of the method according to the invention.
Zur Herstellung dieses Sandwichbauteils 100 wird zunächst ein Lagenaufbau 40 erzeugt, durch Ablegen wenigstens eines Prepreg-Zuschnitts 10, der die untere Decklage 110 bildet, darüber Ablegen eines zugeschnittenen hautlosen bzw. hautfreien Polyolefin-Schaumstoffs 30, der den Schaumkern 130 bildet, und darüber Ablegen wenigstens eines Prepreg-Zuschnitts 20, der die obere Decklage 120 bildet, wie in
Der noch verformbare Lagenaufbau 40 wird in ein formgebendes Werkzeug (Autoklav-Werkzeug) 50 eingelegt, wie in
Anschließend wird das Werkzeug 50 zusammen mit dem Lagenaufbau 40 in einen Autoklav 60 eingelegt, wie in
Nachdem die Druck-Wärme-Behandlung abgeschlossen ist, wird der Autoklav 60 geöffnet, das Werkzeug 50 entnommen und das hergestellte Sandwichbauteil 100 aus dem Werkzeug 50 entformt. Das Sandwichbauteil 100 wird dann gegebenenfalls noch beschnitten und/oder lackiert.After the pressure-heat treatment is completed, the
Zusätzliche Merkmale des erfindungsgemäßen Sandwichbauteils 100 und/oder des erfindungsgemäßen Herstellungsverfahrens sind obenstehend erläutert.Additional features of the
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDED IN 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 of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturPatent Literature Cited
- DE 102010033627 A1 [0004]DE 102010033627 A1 [0004]
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Citations (4)
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DE19510820A1 (en) | 1994-04-07 | 1995-10-12 | Greiner & Soehne C A | Multi-layer component |
DE102010033627A1 (en) | 2010-08-06 | 2012-02-09 | Daimler Ag | Shaped plastic multilayer component with endlessly reinforced fiber layers and method for its production |
DE102012216582A1 (en) | 2012-09-17 | 2014-03-20 | Gaugler & Lutz Ohg | Method for forming enclosed object from thermoplastic material by using thermoforming device utilized in e.g. industry, involves reshaping, assembling and cooling thermoplastic material or composite material, and removing object from casing |
DE112012003520T5 (en) | 2011-08-25 | 2014-05-08 | Bcomp Ag | A method for producing a composite material, and a board made of this composite material |
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2020
- 2020-10-23 DE DE102020127982.5A patent/DE102020127982A1/en not_active Withdrawn
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Publication number | Priority date | Publication date | Assignee | Title |
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DE19510820A1 (en) | 1994-04-07 | 1995-10-12 | Greiner & Soehne C A | Multi-layer component |
DE102010033627A1 (en) | 2010-08-06 | 2012-02-09 | Daimler Ag | Shaped plastic multilayer component with endlessly reinforced fiber layers and method for its production |
DE112012003520T5 (en) | 2011-08-25 | 2014-05-08 | Bcomp Ag | A method for producing a composite material, and a board made of this composite material |
DE102012216582A1 (en) | 2012-09-17 | 2014-03-20 | Gaugler & Lutz Ohg | Method for forming enclosed object from thermoplastic material by using thermoforming device utilized in e.g. industry, involves reshaping, assembling and cooling thermoplastic material or composite material, and removing object from casing |
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