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WO2019076520A1 - Procédé pour la fabrication d'un composant sandwich et composant sandwich - Google Patents

Procédé pour la fabrication d'un composant sandwich et composant sandwich Download PDF

Info

Publication number
WO2019076520A1
WO2019076520A1 PCT/EP2018/073571 EP2018073571W WO2019076520A1 WO 2019076520 A1 WO2019076520 A1 WO 2019076520A1 EP 2018073571 W EP2018073571 W EP 2018073571W WO 2019076520 A1 WO2019076520 A1 WO 2019076520A1
Authority
WO
WIPO (PCT)
Prior art keywords
foam layer
layer
thickened
desired shape
foam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2018/073571
Other languages
German (de)
English (en)
Inventor
Nicolas Behrens
Markus Dix
Stanislaw Nowak
Christian Reinisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of WO2019076520A1 publication Critical patent/WO2019076520A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3835—Designing moulds, e.g. using CAD-CAM
    • 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
    • B32B3/26—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/263—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer having non-uniform thickness
    • 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
    • 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
    • B32B5/18—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 features of a layer of foamed material
    • 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
    • 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
    • B32B5/18—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 features of a layer of foamed material
    • B32B5/20—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 features of a layer of foamed material foamed in situ
    • 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
    • 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
    • B32B5/245—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 another layer next to it being a foam layer
    • 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
    • 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
    • B32B5/26—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 another layer next to it also being fibrous or filamentary
    • 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
    • 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
    • B32B5/32—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 at least two layers being foamed and next to each other
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/08—Interconnection of layers by mechanical means
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/06—Open cell foam
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/738—Thermoformability

Definitions

  • the present invention relates to a process for producing a
  • Sandwich components used in lightweight constructions typically include a foam core sandwiched between two cover layers, which may be formed from fiber reinforced plastics, metals or other materials. can be carried out, for example, by means of a infusion process with a low pressure level or with a high pressure level (RTM method), the foam core being overmoulded with the material of the cover layers
  • Foam materials are pressed under the most high internal mold pressures of the tools used, but do not have the necessary strength to withstand the pressing pressure. As a result of this and also due to insufficient compression, defects and defects in the sandwich structure can occur which adversely affect the mechanical properties of the sandwich component.
  • the sandwich component to be produced comprises a first cover layer and a foam layer.
  • Foam layer are joined by the process uniform, stable and defect-free.
  • a Soflform the foam layer is set for this purpose.
  • the desired shape of the foam layer ensue.Form the foam layer is understood that in the final manufactured Sandwichbautei! to be found so !!
  • the dimensions of the desired shape of the foam layer thus correspond to those dimensions of the foam layer in the finished sandwich component.
  • the foam layer may have different shapes depending on the sandwich component to be produced. Also, the thickness of the foam layer, which is measured in the stacking direction of the foam layer and the first cover layer, in different
  • the desired shape of the foam layer can be generated in physical form or else only in the form of electronic data, for example by means of a CAD method.
  • a three-dimensional image of the foam layer is created by increasing a layer thickness of the desired shape of the foam layer in at least one region of the desired shape in the layer thickness direction.
  • the foam layer is thus thickened in at least one area.
  • this step creates a thickened foam layer.
  • the thickening can be carried out in locally limited areas or over the entire foam layer. In particular, the thickening is carried out on curved regions of the foam layer.
  • the three-dimensional image of the foam layer can also be produced in physical form or else only in the form of electronic data, for example by means of a CAD process.
  • the thickened foam layer is produced on the basis of the three-dimensional image.
  • the thickened foam layer is characterized in Compared to the foam layer in the finished product of the sandwich component by at least one area whose layer thickness compared to
  • Layer thickness of the desired shape of the foam layer is increased.
  • bonding of the thickened foam layer to the first cover layer takes place in such a way that the foam layer with the predetermined desired shape is formed in the sandwich component.
  • the layer thickness of the foam layer is reduced again, to such an extent that the dimensions in the foam layer of the sandwich component are achieved, which already defines the shape of the foam layer to have. This can be done for example by a
  • Pressing process are carried out, through which the foam layer and the first cover layer come into contact, so that defects, ie in particular a lack of connection formation between the first cover layer and the
  • Foam layer, and defects in the sandwich component can be reduced or even prevented, and without the dimensions of the foam läge in the sandwich component are affected in comparison to your Soliform.
  • the definition of a desired shape of the foam layer comprises producing the soliform of the foam layer, whereby the desired shape of the foam layer is obtained in physical form. Based on the actually produced desired shape of the foam layer, it is easier possible a suitable percentage for the thickening or a sufficient
  • step of creating the three-dimensional image of the foam layer to be produced comprises the following steps:
  • One step here is characterized by generating a grid on one surface of the soliform of the foam layer and another by generating vectors perpendicular to a grid surface of the grid, wherein a length of the vectors corresponds to a layer thickness increase of the desired shape.
  • a raster to be generated according to this embodiment becomes a
  • a kind of surface scaling ie shaving a surface of the Sbllform the foam layer.
  • the surface of the desired shape of the foam layer is thus divided into smaller subsegments. This is usually not physically but electronically, for example, with the aid of a computer program.
  • vectors are now set perpendicular to the surface of the grid.
  • a so-called vector set is obtained. The more vectors are set, the more accurate the surface of the desired shape of the foam layer can be modeled and transformed into a three-dimensional, on gedickte image of the foam layer.
  • an offset layer is now set, which is available for compensating the layer thickness of the foam layer by compaction during the production process of the sandwich component.
  • Defects in the connection formation between the foam layer and the first cover layer can also be reduced in particular by the advantageous development in which the grid is narrower in areas of the desired shape of the foam layer with greater curvature than the grid in areas of the desired shape of the foam layer with less curvature.
  • the layer thickness increase is preferably selected in a range that it is 2 to 12% and especially 5 to 10%, based on the layer thickness of the desired shape 'of the foam layer. This is advantageous since for most foams up to a compression of 12% and in particular of up to 10%, the ratio of pressure and compression is relatively linear. Thus, when connecting the thickened foam layer with the first cover layer, a relatively constant pressure level can be achieved.
  • the process for producing the thickened foam layer is not limited in detail.
  • Advantageous in the light of very good mass production are foaming of the thickened foam layer in a foaming mold or thermoforming of the thickened foam layer.
  • the thickened foam layer can also be produced by milling.
  • the thermoforming is particularly well suited because of the very good practicability and high Taktuhg, as well as due to the precise and homogeneously producible foams.
  • the bonding of the thickened foam layer to the first cover layer is advantageously carried out by forming a cohesive and / or non-positive and / or positive connection.
  • a positive connection has been found to be particularly advantageous in open-cell foams, since in particular when using a matrix material-containing first cover layer, the matrix material penetrates into the pores and thus can permanently stably connect the first cover layer to the foam layer.
  • Substance-conclusive compounds are preferably obtained by adhesion between the first cover layer and the
  • Foam layer achieved.
  • the first liner employs a thermoplastic or thermoset matrix material, e.g. gives a very good adhesion, and the first cover layer adheres very well to the foam layer due to the formation of a material connection.
  • Foam layer and the first cover layer executed.
  • the method may advantageously comprise a step of connecting the thickened foam layer to a second cover layer.
  • the second cover layer may be formed identically to the first cover layer. But this is not mandatory. Rather, the second cover layer can be selected in particular with regard to the desired mechanical stability of the sandwich component.
  • the bonding of the second cover layer with the thickened foam layer takes place in such a way that the thickened foam layer comes to rest between the first cover layer and the second cover layer.
  • the layer structure in the sandwich component is therefore: first
  • the first cover layer comprises a fiber composite material, for example a glass fiber composite plastic or a carbon fiber composite plastic.
  • the second cover layer may be formed analogously and also a
  • Sandwich component is characterized by very good mechanical properties, since in particular a connection between the first cover layer and the foam layer without flaws and defects, but with a very good and stable connection formation between the foam layer and the first cover layer is formed.
  • Figure 1 is a schematic view of method steps for
  • FIG. 1 illustrates in detail method steps for producing a
  • Sandwich component 10 includes an example
  • One or more further cover layers for example on a side opposite the first cover layer 12, may be provided. As a result, the foam layer 13 would be arranged between two cover layers.
  • a desired shape of the foam layer 1 is determined.
  • the desired shape of the foam layer 1 corresponds in this case in the form and dimensions of the foam layer 13, as it is also present in the sandwich component 10 to be produced.
  • the desired shape of the foam layer 1 is shown here in section and has a region with greater curvature 4, which is between two areas with lesser
  • Curvature 5 that is essentially two straight, the area with greater curvature 4 flanking areas, is arranged.
  • Foam layer 1 has a layer thickness S.
  • a three-dimensional image of the foam layer 2 is produced.
  • the three-dimensional image of the foam layer 2 is shown laterally from above to better represent the surface of the image of the foam layer 2.
  • the image of the foam layer 2 may be physically fabricated or generated by means of a CAD or other computer program in the form of electronic data.
  • a layer thickness of the desired shape of the foam layer 2 is increased in at least one region of the desired shape 2 in the layer thickness direction.
  • a grid 3 is generated on a surface of the desired shape of the foam 1. This can also be done in particular by means of a computer program.
  • the surface of the desired shape of the foam layer 1 or the surface of the image of the foam layer 2 is rasterized and scaled and shows by way of example a network with orthogonally arranged lines 7, which intersect at points of intersection 8.
  • a vector V is now generated, which is arranged perpendicular to a grid surface 6 of the grid 3, which is indicated by the right angle.
  • a vector field is obtained in which each vector V has the same length A.
  • the length A of the vectors V corresponds to a layer thickness increase 9 of the desired shape 1, which is good in method step B.
  • the grid 3 is in areas of the desired shape of the foam layer 1 with larger
  • Curvature 4 narrower than the grid in areas of the desired shape of the foam layer 2 with less curvature 5. This allows the surface of the soil form of the foam layer 2 are shown in more detail by the vector field.
  • a foam layer 11 which has been thickened in relation to the desired shape of the foam layer 1 is produced in physical form.
  • This has a total layer thickness of S + A, that is to say a total layer thickness which results from the layer thickness S of the desired shape of the foam layer 1 and the length of the vectors A, which corresponds to the layer thickness increase 9.
  • the thickened foam layer 11 can be produced in one piece or be formed by a separate foam layer, which corresponds only to the layer thickness increase 9, which is then arranged, for example, on the desired shape of the foam layer 1, provided that it is in physical form.
  • the layer thickness increase 9 is in this case in particular in a range of 2 to 12% and in particular of 5 to 10%, in each case based on the layer thickness (S) of the desired shape of the foam layer (1).
  • step D the thickened foam layer 11 is joined to the first cover layer 12 in such a way that in the sandwich component 10 a
  • Foam layer 13 is formed with the shape and dimensions of the predetermined desired shape of the foam layer 1. This can be carried out, for example, by means of an RTM method, in which both the first cover layer 12.
  • a thickness of the thickened foam läge 1 1 is again reduced by the applied pressure, in such a degree that the layer thickness S of the foam layer 13 in the sandwich component 10 of the layer thickness S in the desired shape of the foam layer 1 corresponds.
  • the bonding of the thickened foam layer 11 to the first cover layer 12 is performed by forming an adhesive bond between the thickened foam layer 11 and the first cover layer 12. This is possible in particular by using an RT process in the production of the sandwich component, e.g. by the second cover layer 12 of a
  • Fiber composite plastic is produced, comprising a curable resin material and a fiber material.
  • a cover layer 12 formed in this way can be produced very well by an RTM method and produced on a surface of the thickened foam layer 1, whereby a coherent and especially with open-pored foam layers also a form-fitting
  • a sandwich component 10 is produced, in which the foam filler 13 has a precisely predefined shape, namely that of the soil form of the foam layer 1. Furthermore, no defects or defects are present between the first cover layer 12 and the foam layer 13. The connection formation between the first cover layer 12 and the foam layer 13 is free of defects, so that the sandwich component 10 has very good mechanical properties

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

L'invention concerne un procédé pour la fabrication d'un composant sandwich (10) comprenant une première couche de couverture (12) et une couche de mousse (13). Le procédé comprend les étapes de i) la spécification de la forme nominale de la couche de mousse (1), ii) la création d'une représentation tridimensionnelle de la couche de mousse (2), en augmentant une épaisseur de couche (S) de la forme nominale de la couche de mousse (1) dans la direction de l'épaisseur de couche dans au moins une zone de la forme nominale (1), iii) la fabrication d'une couche de mousse (11) à surépaisseur sur la base de la représentation tridimensionnelle de la couche de mousse (2) et iv) la liaison de la couche de mousse (11) à surépaisseur avec la première couche de couverture (12) de telle façon qu'une couche de mousse (13) ayant la forme nominale (1) déterminée est formée dans le composant sandwich (10).
PCT/EP2018/073571 2017-10-17 2018-09-03 Procédé pour la fabrication d'un composant sandwich et composant sandwich Ceased WO2019076520A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017218489.2A DE102017218489A1 (de) 2017-10-17 2017-10-17 Verfahren zur Herstellung eines Sandwichbauteils und Sandwichbauteil
DE102017218489.2 2017-10-17

Publications (1)

Publication Number Publication Date
WO2019076520A1 true WO2019076520A1 (fr) 2019-04-25

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Application Number Title Priority Date Filing Date
PCT/EP2018/073571 Ceased WO2019076520A1 (fr) 2017-10-17 2018-09-03 Procédé pour la fabrication d'un composant sandwich et composant sandwich

Country Status (2)

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DE (1) DE102017218489A1 (fr)
WO (1) WO2019076520A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009025940A1 (de) * 2009-06-09 2010-12-16 Benecke-Kaliko Ag Mehrschichtiges Folienlaminat
WO2017010872A1 (fr) * 2015-07-10 2017-01-19 Fits Holding B.V. Procédé de fabrication d'un panneau sandwich ayant une configuration asymétrique dans le sens de l'épaisseur

Family Cites Families (4)

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