DE202011104056U1 - Draperable core material for sandwich laminates - Google Patents

Draperable core material for sandwich laminates Download PDF

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DE202011104056U1
DE202011104056U1 DE201120104056 DE202011104056U DE202011104056U1 DE 202011104056 U1 DE202011104056 U1 DE 202011104056U1 DE 201120104056 DE201120104056 DE 201120104056 DE 202011104056 U DE202011104056 U DE 202011104056U DE 202011104056 U1 DE202011104056 U1 DE 202011104056U1
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core material
plate
drapable
draperable
drapable core
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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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/546—Measures for feeding or distributing the matrix material in the reinforcing structure
    • B29C70/547—Measures for feeding or distributing the matrix material in the reinforcing structure using channels or porous distribution layers incorporated in or associated with the product
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • B29C70/086—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers and with one or more layers of pure plastics material, e.g. foam layers
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
    • B29C70/865—Incorporated in coherent impregnated reinforcing layers, e.g. by winding completely encapsulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • 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
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/14—Wood, e.g. woodboard or fibreboard
    • 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
    • B29K2715/00—Condition, form or state of preformed parts, e.g. inserts
    • B29K2715/003—Cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
    • B32B37/182—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only one or more of the layers being plastic

Abstract

Drapierbarer Kernwerkstoff, hergestellt aus ebenem Halbzeug durch Unterteilung der Platte in lokale Balkenelemente mittels gezielt eingebrachter Schlitze senkrecht zur Plattenebene.Drapable core material, made from a flat semi-finished product by dividing the plate into local beam elements by means of targeted slots perpendicular to the plate level.

Description

Die Erfindung betrifft einen drapierbaren Kernwerkstoff der durch einen Stanz-Strahl- oder Laserscheid-Prozess aus einen plattenförmigen Halbzeug (1) hergestellt wird. Die dabei in die Platte (1) eingebrachten Schnitte (2) ermöglichen lokale Dehnungen (3) und Stauchungen (4) nnerhalb der Plattenebene sowie eine Reduzierung der Biegesteifigkeit. Dies ermöglicht es, steife plattenförmige Halbzeuge auf räumlich gekrümmte Oberflächen aufzubringen. 1 The invention relates to a drapable core material of a plate-shaped semi-finished by a punch-jet or laser cutting process ( 1 ) will be produced. The case in the plate ( 1 ) introduced cuts ( 2 ) allow local strains ( 3 ) and compression ( 4 ) within the plane of the plate as well as a reduction in bending stiffness. This makes it possible to apply rigid plate-shaped semi-finished products on spatially curved surfaces. 1

Zur Herstellung von leichten steifen und hochfesten Bauteilen kommen häufig Sandwichlaminate zum Einsatz. Dabei wird das Bauteil aus mehreren Schichten aufgebaut, wobei die jeweils äußeren Schichten die hohen Zug- und Druckspannungen aufnehmen und die mittlere Schicht überwiegend Schubspannungen aufnimmt. In den häufigsten Anwendungsfällen besteht das Laminat aus drei Schichten, wobei die beiden äußeren Schichten aus hochfesten Faserwerkstoffen oder Metallen bestehen und die Kernschicht aus einem möglichst leichten und dennoch schubsteifen Schichtwerkstoff besteht. Je dicker die Kernschicht, desto steifer und fester ist das Bauteil.For the production of light stiff and high strength components sandwich laminates are often used. In this case, the component is composed of several layers, wherein the respective outer layers absorb the high tensile and compressive stresses and the middle layer absorbs predominantly shear stresses. In the most common applications, the laminate consists of three layers, with the two outer layers of high-strength fiber materials or metals and the core layer consists of a lightweight as possible, yet shear-resistant coating material. The thicker the core layer, the stiffer and stronger the component.

Zur Herstellung räumlich gekrümmter Bauteile ist es erforderlich das in der Regel plattenförmige Halbzeug des Kernwerkstoffes an die räumliche Krümmung der Bauteilgeometrie anzupassen. Dies wird bei herkömmlichen Kernwerkstoffen, (in häufigen Anwendungsfällen Schaumstoffplatten), dadurch erschwert dass der Schichtwerkstoff möglichst steif ist, sowie durch die Tatsache, dass sich eine ebene Platte nur sehr schwer in zwei Raumrichtungen gleichzeitig biegen lässt.For the production of spatially curved components, it is necessary to adapt the generally plate-shaped semifinished product of the core material to the spatial curvature of the component geometry. This is made more difficult in conventional core materials (in many cases foam boards) in that the coating material is as stiff as possible, and in the fact that a flat plate is very difficult to bend simultaneously in two spatial directions.

Bisher bekannte schichtförmige Kernwerkstoffe wie beispielsweise Kunststoffschäume oder Balsaholz werden überwiegend durch das Einbringen von Sägeschlitzen oder Messerschnitten in der Plattenoberfläche verformbar gemacht. Dabei werden in regelmäßigen Abständen Schlitze oder Nuten in die Plattenoberfläche geschnitten die meist mehr als die Hälfte der Plattendicke in das Bauteil hineinragen. Diese Schnitte sind in der Regel im 90°-Winkel zueinander angeordnet. Im Idealfall werden diese Schnitte von beiden Seiten in das Werkstück eingebracht und ragen bis zu 80% der Plattendicke tief in das Bauteil hinein. Obwohl diese Maßnahme die Biegbarkeit der Platte erhöht wird die Drapierbarkeit der Platte nur unzureichend verbessert, da die lokalen Dehnungen der Platte nicht gewährleistet werden. Die Herstellung dieser Schlitze ist relativ aufwändig da die Platte hierzu mehrfach gedreht und gewendet werden muss.Previously known layered core materials such as plastic foams or balsa wood are made deformable mainly by the introduction of Sägeschlitzen or knife cuts in the plate surface. In this case, slits or grooves are cut into the plate surface at regular intervals which usually protrude more than half of the plate thickness in the component. These cuts are usually arranged at 90 ° to each other. Ideally, these cuts are made from both sides into the workpiece and protrude deep into the component up to 80% of the plate thickness. Although this measure increases the bendability of the plate, the drapability of the plate is not adequately improved because the local strains of the plate are not guaranteed. The preparation of these slots is relatively complex because the plate has to be rotated several times and turned over.

Die Aufgabe der Erfindung ist es, durch das gezielte Einbringen von Schnitten in die Platte, diese in einzelne lokale Balkenelemente aufzuteilen, die innerhalb der Plattenebene lokale Dehnungen und Stauchungen zulassen und somit dafür sorgen, dass das Halbzeug zum anpassen an die räumlich gekrümmte Kontur gestreckt und verzogen werden kann. 2.The object of the invention is to divide by the targeted introduction of cuts in the plate, these in individual local beam elements that allow local strains and compressions within the plane of the plate and thus ensure that the semi-finished stretched to adapt to the spatially curved contour and can be spoiled. 2 ,

Da die durch die Schnitte in der Platte erzeugten lokalen Balkenelemente bei Biegung der Platte überwiegend auf Torsion belastet werden, lassen sich damit deutlich kleinere Biegeradien erzielen, als das mit der unbehandelten Platte möglich wäre.Since the local beam elements generated by the cuts in the plate are mainly subjected to torsion when the plate is bent, it is thus possible to achieve significantly smaller bending radii than would be possible with the untreated plate.

Bei Anwendungen die überwiegend in eine Raumrichtung gekrümmt sind bieten sich alternativ auch Schlitzgeometrien nach 5 an.In applications that are predominantly curved in one spatial direction, slot geometries can also be used alternatively 5 at.

Gleichzeitig ermöglichen die eingebrachten Schnitte eine bessere Entlüftung und Durchtränkung des Bauteils bei verschiedenen Infusionsverfahren, da die Schlitze durch die gesamte Plattendicke hindurch ragen und so ein Durchströmen der Platte mit Harz ermöglichen.At the same time, the cuts made allow a better ventilation and impregnation of the component in various infusion methods, since the slots protrude through the entire plate thickness and thus allow a flow through the plate with resin.

Die hier beschriebenen Schlitzgeometrien lassen sich kostengünstig durch Stanzen, Wasserstrahl- oder Laserschneiden herstellen. Hierzu können die Platten bei günstigen Randbedingungen auch gestapelt werden und es lassen sich mehrere Teile in einem Arbeitsgang bearbeiten.The slot geometries described here can be produced inexpensively by punching, water jet or laser cutting. For this purpose, the plates can also be stacked under favorable conditions and it can be edited several parts in one operation.

Die hier beschriebenen Schlitzgeometrien sind besonders geeignet für dünnere Kernwerkstoffe.The slot geometries described here are particularly suitable for thinner core materials.

Claims (7)

Drapierbarer Kernwerkstoff, hergestellt aus ebenem Halbzeug durch Unterteilung der Platte in lokale Balkenelemente mittels gezielt eingebrachter Schlitze senkrecht zur Plattenebene.Drapable core material, produced from flat semifinished product by subdivision of the plate into local beam elements by means of deliberately inserted slots perpendicular to the plane of the plate. Drapierbarer Kernwerkstoff, nach Anspruch 1 hergestellt mittels Stanzen.Drapable core material, produced according to claim 1 by means of punching. Drapierbarer Kernwerkstoff, nach Anspruch 1 hergestellt mittels Wasserstrahlschneiden.Drapable core material, produced according to claim 1 by means of water jet cutting. Drapierbarer Kernwerkstoff, nach Anspruch 1 hergestellt mittels Laserschneiden.Drapable core material, produced according to claim 1 by means of laser cutting. Schlitzgeometrie zur Herstellung eines drapierbaren Kernwerkstoffes gemäß 3 Slot geometry for producing a drapable core material according to 3 Schlitzgeometrie zur Herstellung eines drapierbaren Kernwerkstoffes gemäß 4 Slot geometry for producing a drapable core material according to 4 Schlitzgeometrie zur Herstellung eines drapierbaren Kernwerkstoffes gemäß 5 Slot geometry for producing a drapable core material according to 5
DE201120104056 2011-08-04 2011-08-04 Draperable core material for sandwich laminates Expired - Lifetime DE202011104056U1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015200995A1 (en) * 2015-01-22 2016-07-28 Bayerische Motoren Werke Aktiengesellschaft Process for the preparation of a molding for an impregnation process
WO2020064717A2 (en) 2018-09-24 2020-04-02 Valentine Troi Structural element for a free-form surfaces
CN116277316A (en) * 2023-04-04 2023-06-23 青岛钰坤睿新材料科技有限公司 Arc-shaped plate structure, arc-shaped composite plate and processing method of arc-shaped composite plate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015200995A1 (en) * 2015-01-22 2016-07-28 Bayerische Motoren Werke Aktiengesellschaft Process for the preparation of a molding for an impregnation process
WO2020064717A2 (en) 2018-09-24 2020-04-02 Valentine Troi Structural element for a free-form surfaces
WO2020064717A3 (en) * 2018-09-24 2020-05-22 Valentine Troi Structural element for a free-form surfaces
CN116277316A (en) * 2023-04-04 2023-06-23 青岛钰坤睿新材料科技有限公司 Arc-shaped plate structure, arc-shaped composite plate and processing method of arc-shaped composite plate

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