WO2012062389A1 - Sandwichbauteil und verfahren zu dessen herstellung - Google Patents
Sandwichbauteil und verfahren zu dessen herstellung Download PDFInfo
- Publication number
- WO2012062389A1 WO2012062389A1 PCT/EP2011/004794 EP2011004794W WO2012062389A1 WO 2012062389 A1 WO2012062389 A1 WO 2012062389A1 EP 2011004794 W EP2011004794 W EP 2011004794W WO 2012062389 A1 WO2012062389 A1 WO 2012062389A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thermoplastic
- cover layer
- layer
- honeycomb core
- barrier layer
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims abstract description 71
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 67
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 63
- 239000011159 matrix material Substances 0.000 claims abstract description 35
- 239000012815 thermoplastic material Substances 0.000 claims abstract description 30
- 238000002844 melting Methods 0.000 claims abstract description 23
- 230000008018 melting Effects 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 16
- 229920002678 cellulose Polymers 0.000 claims abstract description 8
- 239000001913 cellulose Substances 0.000 claims abstract description 8
- 239000012783 reinforcing fiber Substances 0.000 claims description 45
- 239000000835 fiber Substances 0.000 claims description 29
- 239000002985 plastic film Substances 0.000 claims description 19
- 229920006255 plastic film Polymers 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- 230000035515 penetration Effects 0.000 claims description 8
- 239000011265 semifinished product Substances 0.000 claims description 6
- 229920005992 thermoplastic resin Polymers 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 3
- 239000004760 aramid Substances 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
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- 229920000098 polyolefin Polymers 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
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- 230000009477 glass transition Effects 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
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- 238000007596 consolidation process Methods 0.000 description 4
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
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- 238000002360 preparation method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
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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
- B29C70/06—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
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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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/465—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating by melting a solid material, e.g. sheets, powders of fibres
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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
- B29C70/68—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
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- 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
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/001—Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings
- B29D99/0021—Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings provided with plain or filled structures, e.g. cores, placed between two or more plates or sheets, e.g. in a matrix
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B32B37/146—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers whereby one or more of the layers is a honeycomb structure
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- 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
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
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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
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
- B29C70/222—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being shaped to form a three dimensional configuration
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- 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
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/07—Parts immersed or impregnated in a matrix
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- B32B2307/546—Flexural strength; Flexion stiffness
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/718—Weight, e.g. weight per square meter
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/02—Temperature
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- 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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/08—Dimensions, e.g. volume
- B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
- B32B2309/105—Thickness
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- 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
- B32B2317/00—Animal or vegetable based
- B32B2317/12—Paper, e.g. cardboard
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24149—Honeycomb-like
Definitions
- the invention relates to a sandwich component comprising a cellulose-based honeycomb core and at least one cover layer, and a manufacturing method for the same.
- sandwich structure In the course of lightweight construction strategy in the automotive industry to reduce both fuel consumption and thus the cost and the carbon dioxide emissions, components with sandwich structure are increasingly used, which is a significantly reduced weight compared to conventional components due to the low density of the material that forms the core, and sufficient Strength values can offer by a suitable cover layer material selection. Further advantages of such sandwich structures are their thermal and acoustic properties.
- the cover layers of the molded part which are arranged on the open sides of the honeycomb honeycomb chambers, prior to the thermoplastic connection with the honeycomb chambers consist of a single-needlepunched nonwoven material of a nonwoven fabric containing thermoplastic fibers, the other, cotton-like side of the nonwoven material after the hot forming and solidification penetrates into the honeycomb chambers.
- the disadvantage of the above prior art is the object of the above prior art to provide a sandwich structure with cover layers, which should have a reduced basis weight without affecting the mechanical strength and to protect the honeycomb core impenetrable to moisture. This object is achieved by the sandwich component having the features of claim 1.
- Another object is to provide a simple and inexpensive manufacturing method for such a sandwich component.
- a sandwich component designed according to the invention consists of at least one cover layer and a honeycomb core.
- the topsheet is formed by a cover layer of reinforcing fibers with a thermoplastic matrix, while the honeycomb core is made of a cellulose-based material and has a plurality of webs whose end edges define a plane on which the cover layer abuts.
- the cover layer between the cover layer and the webs of the honeycomb core comprises a barrier layer of a thermoplastic material.
- the melting properties of the thermoplastic material of the barrier layer correspond to the melting properties of the thermoplastic matrix material of the cover layer, so that between the cover layer and the barrier layer, an intermediate layer can be formed, comprising the reinforcing fibers of the cover layer and thermoplastic material of the barrier layer.
- Corresponding melting properties mean in particular melting points, glass points and melt viscosities, which do not differ significantly from one another.
- the matrix of the intermediate layer is thus by a polymer mixture or a
- Thermoplastics of the cover layer comprises. Apart from tracks, the barrier layer contains no reinforcing fibers. The traces of reinforcing fibers are fibers which protrude from the intermediate layer into the barrier layer.
- the reinforcing fibers of the intermediate layer are penetrated by a portion of the thermoplastic material of the cover layer and a portion of the thermoplastic material of the barrier layer.
- the thermoplastic barrier layer by means of which the intermediate layer is adhesively bonded to the cover layer, on the one hand prevents reinforcing fibers from the cover layer from penetrating into the honeycomb interiors between the webs and thereby reduces the strength-forming fiber content in the cover layer, and on the other hand forms an integrated moisture barrier which protects the cellulose-based honeycomb core from moisture penetration.
- the honeycomb interiors are thus almost free of exposed, or not bound by thermoplastic reinforcing fibers.
- the honeycomb interior is therefore free of any traces of
- the cover layer can be reduced in terms of its basis weight since all existing reinforcement fibers can be used without loss by fibers in the honeycomb cavities in the cover layer.
- the highly consolidated with the increased thermoplastic fraction intermediate layer also contributes to the strength of the top layer.
- the thermoplastic material of the barrier layer may be the same thermoplastic material as the thermoplastic matrix material of the cover layer.
- thermoplastics such as a polyamide, an acrylonitrile-butadiene-styrene, a polypropylene and / or another polyolefin come into question.
- the cover layer of the sandwich component according to the invention may have a thickness in a range from 0.4 to 0.8 mm, preferably approximately 0.6 mm, while the sum of the thicknesses of the barrier layer and the intermediate layer may be in a range from 0.2 to 0, 4 mm and in particular about 0.3 mm.
- the sum of the layer thicknesses of the barrier layer and the intermediate layer corresponds to slightly more than the thickness of a film which is used to form these layers.
- thermoplastic films having a thickness of 0.1 mm to 0.4 mm are preferably used.
- the web end edges are received in the thermoplastic barrier layer of the cover layer.
- the end edges of the webs are completely enveloped by the thermoplastic of the barrier layer.
- the footbridges are in the
- Thermoplastics of the barrier layer supported. In this way, on the one hand, it is achieved that the cover layer is connected relatively firmly to the webs of the honeycomb core and, on the other hand, that a good sealing of the honeycomb core to the outside is achieved.
- the bridge is sealed at the edge, so to speak, by the thermoplastic. Only by the edges, or the According to the process flow around the web edges, a very good seal can be done. Since the thermoplastic of the barrier layer is not fiber reinforced, a very dense and imperfect border is achieved. The bridge material and the honeycomb interiors are thereby very effectively protected against the ingress of moisture.
- honeycomb core is made of paper or cardboard, since these are porous materials in which just about unprotected edges can absorb moisture.
- the depth of the border of the end edges by the thermoplastic of the barrier layer plays a significant role.
- the depth of the border is particularly dependent on the relation between the width of the webs (web width) and the thickness of the barrier layer.
- the thickness of the barrier layer in the region between the honeycomb webs is meant, since the barrier layer thickness in the region of the border naturally decreases.
- the thickness of the barrier layer is above 30% and below 150% of the ridge width, in particular at 30 to 50%.
- the width of the webs is preferably in the range of 200 to 600 ⁇ .
- Particularly preferred honeycomb cores made of paper are used, in which the web width is in the range of 200 to 400 pm.
- the depth of the border is at least 80% of the web width. Preferred are 100 to 200% of the web width.
- the depth of the border can vary to the two sides of the web, or over the lateral extent of the web. A depth of the border above the double bridge width usually brings no further advantages.
- thermoplastic matrix reinforcing fibers used to form the topsheet may be formed by a fiber mat, such as a nonwoven fabric, or a hybrid weave, a hybrid weave or knits, etc.
- the thermoplastic matrix of the topcoat may also be incorporated in the form of non-consolidated thermoplastic fibers. These are in addition to the reinforcing fibers in the tissue, etc. before.
- the fibers, both thermoplastic fibers and reinforcing fibers may also be present in bundled form as rovings. Also conceivable is a variant in which reinforcing fibers individually or in bundles of a thermoplastic
- thermoplastic matrix reinforcing fibers may also be provided by a pre-consolidated thermoplastic sheet having an embedded reinforcing fiber fabric. During the processing process, the thermoplastic fibers melt and form the thermoplastic matrix accordingly.
- the reinforcing fibers can be natural fibers, glass fibers, carbon fibers or carbon fibers, polymer fibers, in particular aramid fibers or a combination thereof.
- a method for producing such a sandwich component generally comprises forming the cover layer of the sandwich component, which is arranged on at least one side of the honeycomb core, underside or top side, so that the cover layer comes to rest on the honeycomb core.
- a thermoplastic film is first deposited on the cellulose-based honeycomb core on the plane, which is spanned by the web end edges of the honeycomb core. The application of adhesives is not required.
- a semi-finished product is arranged, which consists of reinforcing fibers and thermoplastic matrix.
- thermoplastic resin matrix and the plastic film which consist of thermoplastic materials having mutually corresponding melting properties, at least partially melt. Due to the molten material of the thermoplastic film, the formation of the barrier layer takes place directly adjacent to the honeycomb core, while the covering layer is formed by the consolidation of the reinforcing fibers with the thermoplastic polymer matrix in a layer of the cover layer remote from the plastic film or barrier layer. Between the cover layer and the barrier layer, the intermediate layer is formed by the consolidation of the reinforcement fibers of the cover layer in a plastic film or barrier layer near a portion of the thermoplastic matrix material of the cover layer and a portion of the thermoplastic material of the barrier layer. This creates a strong consolidated material in the interim layer. made of reinforcing fiber and an increased thermoplastic content, which is composed of the matrix material and the plastic film material.
- a good bond between honeycomb core and cover layer is achieved by the at least partial melting of the thermoplastic polymer matrix and the plastic film, wherein the web end edges are received at least in the thermoplastic barrier layer of the cover layer.
- the web end edges are circumscribed during the partial melting of the plastic film of this, so that a border of the end edges is formed with thermoplastic.
- the barrier layer is not fiber reinforced. This allows the thermoplastic flow unhindered and form a very dense and defect-free border. The end edges are thereby completely sideways and upwards through the dense thermoplastic
- the depth of the border of the web end edges, or the sinking of the honeycomb core in the thermoplastic film can be controlled, for example, on the pressure of the pressing tool for a given thermoplastic.
- the heating in the pressing tool is carried out by a temperature in the range of the melting temperature of the thermoplastic material.
- the temperature of the plastic matrix and the plastic film preferably lies in the range from the glass transition temperature to the melting temperature of the corresponding plastic.
- the heating temperature of the pressing tool is at least the melting temperature.
- the honeycomb core can be formed before the cover sheet is formed by first moistening it with water by spraying or steaming.
- the moistened honeycomb core may then be placed in a punch and die press tool which will exhibit a predetermined shape of the sandwich component and between which compression of the moistened honeycomb core will then take place at a temperature in the range of 40 ° C to 200 ° C.
- This is followed by the arrangement according to the invention of the plastic film and of the semifinished product, whose simultaneous on or melting and consolidation take place by compression in a correspondingly shaped pressing tool.
- a sandwich component is thus created in which penetration of fibers into the honeycomb chambers is prevented by the barrier layer, where they no longer have a reinforcing effect. Rather, it is advantageously achieved that all reinforcing fibers present in the cover layer contribute to reinforcement.
- the thickness of the cover layer can be reduced, wherein the barrier layer, which prevents the penetration into the honeycomb interior, at the same time serves as a wet barrier, and protects the cellulose-based honeycomb core from moisture penetration.
- 1 is a schematic side sectional view of a connection region of a honeycomb web to the cover layer
- Fig. 2 is a microscopic comparative image of a connection area without
- Fig. 3 is a comparative microscopic photograph of a connection region, where a
- FIG. 4 is a photomicrograph of a connection region of a sandwich component according to the invention, in which a 0.3 mm thick film was used to form the barrier layer.
- the sandwich component according to the invention which makes it possible to reduce the basis weight or the weight per unit area of the cover layers in order to be able to release the lightweight component potential of the sandwich structures in various components, has a cover layer 2, as schematically outlined in FIG.
- the cover layer 2 which comes to rest on the end edges of the webs 1 of a honeycomb core, has, as the topmost layer, that is to say furthest away from the web 1, the cover layer 2a made of reinforcing fibers with a thermoplastic matrix.
- honeycomb is not intended to limit the structure of the honeycomb core, but means a low density, high stiffness structure constructed of ridges Suitable honeycomb core structures include the hexagonal typical "honeycomb” structures as well as wavy, circular, diamond or rectangular fold structures , as well as irregularly designed, "organic” looking structures.
- cellulose-based material for the honeycomb core paper and paperboard are suitable.
- the reinforcing fibers for forming the cover layer may be in the form of nonwoven, random or fiber mats with directional fibers, woven, knitted, laid, both unidirectional and multi-directional.
- a hybrid yarn is conceivable, so that a semi-finished fiber is used which contains thermoplastic fibers which form the matrix, and reinforcing fibers.
- the reinforcing fibers are natural fibers, glass fibers, carbon or carbon fibers, polymer, in particular aramid fibers, but combinations may also be used
- the cover layer 2 has, between the cover layer 2a and the webs 1, a barrier layer 2c which consists of a thermoplastic material which is similar in type to the thermoplastic matrix material. According to the invention, however, at least the melting properties of the thermoplastic materials of the cover layer and the barrier layer must correspond to one another.
- the thermoplastic matrix material and the thermoplastic material of the barrier layer are the same thermoplastic material, which may be, for example, a polyamide, an acrylonitrile-butadiene-styrene, a polypropylene or other polyolefin.
- the barrier layer 2c on the one hand prevents penetration of reinforcing fibers on the cover layer 2a into the honeycomb interior, which is bounded by the webs 1, so that all reinforcing fibers remain within the cover layer 2 and contribute to the reinforcement layer. effect.
- the barrier layer 2c additionally has the advantage, as a pure thermoplastic layer, of acting as a moisture barrier and thus of adequate protection for the paper honeycomb core even with a reduced basis weight
- an intermediate layer 2b is formed, which is formed by a strongly consolidated material of reinforcing fibers from the cover layer 2a both with matrix material of cover layer 2a and with thermoplastic material from the barrier layer 2c to a fiber Consolidated composite material characterized by an increased thermoplastic material content.
- thermoplastic film is placed on the honeycomb core and on the plastic film of a semifinished fiber product with thermoplastic matrix, which are heated and compressed together in a pressing tool, whereby the reinforcing fibers consolidated in the matrix melt.
- thermoplastics of the same type are used, preferably the same thermoplastic material.
- the film used to form the barrier layer 2c must be relatively thick in order to build up a back pressure for the reinforcing fibers from the cover layer 2a. During pressing, the film builds up a counterpressure on the fleece and thus causes a consolidation and a holding together of the fleece.
- Fig. 3 shows a cover layer 2 on a web 1, in which case only a 0.08 mm thick film between honeycomb core and cover layer was arranged.
- the thickness of this film was not sufficient to consolidate the reinforcing fibers from the cover layer, it forms no barrier layer, so that even reinforcing fibers 3 can penetrate into the honeycomb spaces.
- the honeycomb bridge is partially surrounded by the top layer.
- the border is partially formed by fibrous and porous material and partly by the thermoplastic of the film. The strength of the film has not been sufficient here to ensure a tight border of the edge of the web.
- the cover layer 2a has approximately a thickness of 0.6 mm, while the two layers, intermediate layer 2b and barrier layer 2c, make up a total of about 0.3 mm, as can be achieved by a 0.3 mm thick film.
- the basis weight of the cover layers 2 can be reduced without loss of reinforcing properties, while the barrier layer 2c simultaneously constitutes an effective moisture barrier.
- thermoplastic As material of the honeycomb core paper was used with a web width of about 300 ⁇ . The reproduced in the microscopic picture width of 650 ⁇ results from the fact that the web was cut at an angle in the preparation. The depth of the border with thermoplastic is about 450 ⁇ on the left and about 300 m on the right side. The web edge is thus up to the sides and completely surrounded by thermoplastic. The thermoplastic thus leads to a sealing of the edges against moisture and to a lateral support of the edges in the
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/883,815 US20130236688A1 (en) | 2010-11-09 | 2011-09-24 | Sandwich component and method for producing same |
CN201180054022.0A CN103209827B (zh) | 2010-11-09 | 2011-09-24 | 夹层式构件及其制造方法 |
JP2013538083A JP5688158B2 (ja) | 2010-11-09 | 2011-09-24 | サンドイッチ部材とその製造方法 |
EP11764477.3A EP2637857B1 (de) | 2010-11-09 | 2011-09-24 | Sandwichbauteil und verfahren zu dessen herstellung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010050872.1 | 2010-11-09 | ||
DE102010050872.1A DE102010050872B4 (de) | 2010-11-09 | 2010-11-09 | Sandwichbauteil und Verfahren zu dessen Herstellung |
Publications (1)
Publication Number | Publication Date |
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WO2012062389A1 true WO2012062389A1 (de) | 2012-05-18 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/004794 WO2012062389A1 (de) | 2010-11-09 | 2011-09-24 | Sandwichbauteil und verfahren zu dessen herstellung |
Country Status (6)
Country | Link |
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US (1) | US20130236688A1 (de) |
EP (1) | EP2637857B1 (de) |
JP (1) | JP5688158B2 (de) |
CN (1) | CN103209827B (de) |
DE (1) | DE102010050872B4 (de) |
WO (1) | WO2012062389A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH699797A1 (de) * | 2008-10-28 | 2010-04-30 | Woodwelding Ag | Verfahren zum befestigen einer kante an einem leichtbauelement. |
US10059076B2 (en) | 2008-10-28 | 2018-08-28 | Woodwelding Ag | Method of fastening an edge structure to a construction element |
US9205635B2 (en) | 2012-09-06 | 2015-12-08 | Xamax Industries, Inc. | Composite sheet material and method for forming the same |
US9138943B2 (en) * | 2012-09-06 | 2015-09-22 | Xamax Industries, Inc. | Composite sheet material and method for forming the same |
DE102013021195A1 (de) | 2013-12-17 | 2015-06-18 | Daimler Ag | Verfahren zum Herstellen eines Halbzeugs für ein Faserverbundbauteil |
DE102014007510A1 (de) * | 2014-05-23 | 2015-11-26 | Airbus Defence and Space GmbH | Sandwichbauteil sowie Verfahren zur Herstellung eines Sandwichbauteils |
DE102017203042A1 (de) * | 2017-02-24 | 2018-08-30 | Robert Bosch Gmbh | Schallwandler |
EP3480008B1 (de) * | 2017-11-03 | 2022-01-05 | Bucher Leichtbau AG | Leichtbauteil |
JP7376295B2 (ja) * | 2019-09-25 | 2023-11-08 | 株式会社Subaru | 繊維強化樹脂複合材及び繊維強化樹脂複合材の製造方法 |
ES2967873T3 (es) | 2020-08-05 | 2024-05-06 | Airbus Operations Slu | Panel intercalado con un núcleo en panal de abejas y método para fabricar el mismo |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004013146A1 (de) * | 2004-03-17 | 2005-10-13 | Airbus Deutschland Gmbh | Verfahren zur Verstärkung von Kernstrukturen zur Bildung von beidseitig mit Deckschichten versehenen Kernverbunden sowie lokal verstärkter Kernverbund |
DE102007007554A1 (de) * | 2007-02-15 | 2008-08-21 | Webasto Ag | Flächiges Verbundbauteil eines Fahrzeugs und Verfahren zu dessen Herstellung |
DE102004015472B4 (de) | 2004-03-26 | 2010-03-11 | Herbert Olbrich Gmbh & Co. Kg | Mehrlagiges Formteil und Verfahren zu seiner Herstellung |
WO2010026054A1 (de) * | 2008-09-03 | 2010-03-11 | Airbus Operations Gmbh | Sandwichplatte mit integrierter verstärkungsstruktur sowie verfahren zu deren herstellung |
WO2011088871A2 (de) * | 2010-01-22 | 2011-07-28 | Daimler Ag | Sandwichbauteil und verfahren zu dessen herstellung |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4902365A (en) * | 1987-12-03 | 1990-02-20 | Westlake Sr Edward F | Method for making a composite sheet-like structure |
AU650769B2 (en) * | 1991-08-05 | 1994-06-30 | 3A Technology & Management Ltd. | Process for the production of a composite sheet comprising a cellular core and at least one outer layer |
JP2627851B2 (ja) * | 1992-07-29 | 1997-07-09 | 川崎重工業株式会社 | ハニカムサンドイッチ構造 |
JPH06190957A (ja) * | 1992-12-25 | 1994-07-12 | Yokohama Rubber Co Ltd:The | ハニカムサンドイッチパネル及びその製造方法 |
NL9500623A (nl) * | 1995-03-31 | 1996-11-01 | Besin Bv | Honingraatkern van vochtkerend materiaal. |
EP0787578A3 (de) * | 1996-02-05 | 1998-07-15 | C.A. Greiner & Söhne Gesellschaft M.B.H. | Mehrlagiges Bauelement und Verfahren zu seiner Herstellung |
CA2198829A1 (en) * | 1997-02-28 | 1998-08-28 | Global Upholstery Company | Lightweight panel structure |
DE10358295B4 (de) * | 2003-10-17 | 2009-11-26 | Euro-Composites S.A. | Leichtbau-Verbundmaterial sowie Verfahren zu dessen Herstellung |
DE102004001080A1 (de) * | 2004-01-05 | 2005-08-04 | Airbus Deutschland Gmbh | Anordnung zur Innenverkleidung einer Passagierkabine eines Flugzeuges |
DE502006002085D1 (de) * | 2006-09-07 | 2008-12-24 | Euro Composites | Verfahren zur Herstellung eines Sandwich-Bauteils mit einem Wabenkern |
ES2596883T3 (es) * | 2009-01-06 | 2017-01-12 | Cytec Technology Corporation | Material compuesto estructural con propiedades acústicas y amortiguadoras de las vibraciones mejoradas |
-
2010
- 2010-11-09 DE DE102010050872.1A patent/DE102010050872B4/de active Active
-
2011
- 2011-09-24 JP JP2013538083A patent/JP5688158B2/ja active Active
- 2011-09-24 WO PCT/EP2011/004794 patent/WO2012062389A1/de active Application Filing
- 2011-09-24 US US13/883,815 patent/US20130236688A1/en not_active Abandoned
- 2011-09-24 CN CN201180054022.0A patent/CN103209827B/zh active Active
- 2011-09-24 EP EP11764477.3A patent/EP2637857B1/de active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004013146A1 (de) * | 2004-03-17 | 2005-10-13 | Airbus Deutschland Gmbh | Verfahren zur Verstärkung von Kernstrukturen zur Bildung von beidseitig mit Deckschichten versehenen Kernverbunden sowie lokal verstärkter Kernverbund |
DE102004015472B4 (de) | 2004-03-26 | 2010-03-11 | Herbert Olbrich Gmbh & Co. Kg | Mehrlagiges Formteil und Verfahren zu seiner Herstellung |
DE102007007554A1 (de) * | 2007-02-15 | 2008-08-21 | Webasto Ag | Flächiges Verbundbauteil eines Fahrzeugs und Verfahren zu dessen Herstellung |
WO2010026054A1 (de) * | 2008-09-03 | 2010-03-11 | Airbus Operations Gmbh | Sandwichplatte mit integrierter verstärkungsstruktur sowie verfahren zu deren herstellung |
WO2011088871A2 (de) * | 2010-01-22 | 2011-07-28 | Daimler Ag | Sandwichbauteil und verfahren zu dessen herstellung |
Also Published As
Publication number | Publication date |
---|---|
DE102010050872B4 (de) | 2016-10-20 |
CN103209827B (zh) | 2015-08-05 |
JP2013542107A (ja) | 2013-11-21 |
US20130236688A1 (en) | 2013-09-12 |
DE102010050872A1 (de) | 2012-05-10 |
EP2637857A1 (de) | 2013-09-18 |
EP2637857B1 (de) | 2014-11-26 |
CN103209827A (zh) | 2013-07-17 |
JP5688158B2 (ja) | 2015-03-25 |
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