EP4010176A1 - Procédé de production d'un constituant et constituant de ce dernier - Google Patents

Procédé de production d'un constituant et constituant de ce dernier

Info

Publication number
EP4010176A1
EP4010176A1 EP20753311.8A EP20753311A EP4010176A1 EP 4010176 A1 EP4010176 A1 EP 4010176A1 EP 20753311 A EP20753311 A EP 20753311A EP 4010176 A1 EP4010176 A1 EP 4010176A1
Authority
EP
European Patent Office
Prior art keywords
tear
film
component
component substrate
segments
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.)
Pending
Application number
EP20753311.8A
Other languages
German (de)
English (en)
Inventor
Lennert HEILMANN
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.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsches Zentrum fuer Luft und Raumfahrt eV
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 Deutsches Zentrum fuer Luft und Raumfahrt eV filed Critical Deutsches Zentrum fuer Luft und Raumfahrt eV
Publication of EP4010176A1 publication Critical patent/EP4010176A1/fr
Pending 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
    • 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
    • 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
    • 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
    • B32B3/30—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 formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating

Definitions

  • the invention relates to a method for producing a component from a Bauma material which has at least one plastic material.
  • the invention also relates to a component for this purpose.
  • a matrix material embedding the fiber material is usually cured under the application of temperature and pressure and thus forms an integral unit with the fiber material after curing.
  • the reinforcing fibers of the fiber material are thereby forced in their specified direction and can transfer the occurring loads in the specified direction.
  • Fiber composite materials from which such fiber composite components are produced generally have two main components, namely on the one hand a fiber material and on the other hand a matrix material.
  • other secondary components can be used, such as binder materials or additional functional elements that are to be integrated into the component.
  • the matrix material of the fiber composite material is infused into the fiber material by an infusion process during the production process, through which the dry fiber material is impregnated with the matrix material. This usually happens due to a pressure difference between the matrix material and the fiber material, in that both for example, the fiber material is evacuated by means of a vacuum pump.
  • fiber composite materials are also known in which the fiber material is already pre-impregnated with the matrix material (so-called prepregs).
  • the fiber material Before the matrix material hardens, the fiber material is usually introduced into a molding tool which, with its molding tool surface, simulates the subsequent component shape. Both dry and pre-impregnated fiber materials can be placed or introduced into the molding tool.
  • Fiber composite components have a number of disadvantages compared to isotropic materials when they are made, since the component shape of a fiber composite component usually has to be formed by appropriate molding tools, which represent a kind of negative imprint of the later component. It is therefore not uncommon for complex fiber composite components to be glued to one another in order to be able to produce the complex geometry from various components that are either made from fiber composite materials or are composed of isotropic materials.
  • a method for applying a material to a surface of a fiber composite component is known from the post-published DE 10 2018 111 306.4, where a monofilament fabric with matrix material is arranged on the component surface and cured in a common process step with the matrix material of the fiber composite component before the material is applied becomes. After curing, the monofilament fabric is peeled off the component and then the material is applied. The hardening of the matrix materials results in the Boundary area between the component and the monofilament fabric a firm connection, the matrix material being broken cohesively in the boundary area by the tearing of the monofilament fabric.
  • connection layer (“bond ply”) and a tear-off layer (English: “peel ply”) on the fiber composite component to prepare a joining surface is placed. After curing, the connection layer and the tear-off layer are removed from the component, whereby the joining surface of the component is activated for a further application step.
  • tear-off fabric as a method for surface activation, however, harbors a fundamental contradiction in terms of the requirements.
  • a clean, activated surface should be created.
  • the fabric should be able to be pulled off by hand without great effort, and the component must not be damaged in the process.
  • tear-off fabrics Another disadvantage of conventional tear-off fabrics is that the components are often stored or transported for a long time (e.g. from overseas) before the next process step takes place. Since the tear-off fabric usually used is not a diffusion barrier, moisture can diffuse through the tear-off fabric into the components, so that they have an inadmissibly high moisture content at the time of processing. It is therefore often necessary to re-dry the components before applying further materials. It is therefore the object of the present invention to provide an improved method for the manufacture of a component, in particular a fiber composite component, with which improved surface activation for the application of further materials can be achieved.
  • a method for producing a component from a component material which has at least one plastic material where a component substrate is initially provided from which the component is to be produced.
  • the component substrate can consist of the plastic material, for example, without containing further fiber materials.
  • the component substrate can, however, also have the fiber material of a fiber composite material, but without also containing the necessary matrix material at the time of provision. This is only infused into the fiber material of the component substrate at a later point in time.
  • the component substrate can, however, also contain the fiber material and the matrix material embedding the fiber material.
  • At least one tear-off film which has a metallic or ceramic surface on at least one application side.
  • the tear-off film with the metallic or ceramic application side is applied to the component substrate in at least one application section in order to protect the surface of the component substrate in the application section from contamination and the ingress of moisture during storage and transport to prepare and, above all, to activate them for later processing.
  • the plastic material contained in the component substrate is then consolidated against the tear-off film applied in the application section, more precisely against the metallic or ceramic surface of the application side of the tear-off film, in order to connect the tear-off film cohesively and / or adhesively to the consolidated plastic material in the application section.
  • the consolidation of the plastic material is understood to mean that the plastic material is at least partially cured. It is also conceivable, however, that the plastic material is completely cured, ie the polymerisation processes of the plastic material are largely completed. This is also understood to mean that a plastic material solidifies without undergoing a chemical reaction if, for example, it was previously liquefied.
  • the tear-off film is now peeled off or removed from the component substrate after the consolidation step (for example in the form of tearing off) so that the surface of the component substrate thus formed is appropriately prepared and activated for further application steps.
  • the peeling process can be carried out manually or by machine, whereby the peeling force can be measured in the case of a machine peeling, which enables extended quality control and process monitoring.
  • the inventor has also recognized that, in particular, commercially available Me tallfolien in a generic manufacturing method for plastic components as Have tear-off fabric used. It was found, in particular, surprisingly, that such thin metal foils can be peeled off with a pull-off force even after the cohesive and / or adhesive connection with the plastic material, which does not damage either the metal foil or the component.
  • the tear-off foil can in particular consist of aluminum, stainless steel, copper, nickel, titanium or other alloys.
  • a tear-off foil in particular a metal foil, which comprises or is formed from aluminum, it is advantageous if it has a thickness of 50 to 350 ⁇ m.
  • the tear-off film has a thickness of 20 to 200 ⁇ m.
  • the tear-off film is particularly free of adhesion-inhibiting residues on the application side, which could remain on the component surface after peeling and thus interfere with the subsequent application process.
  • the tear-off film is not a fabric or textile-like structure.
  • the tear-off foil can preferably have a metal oxide layer (e.g. aluminum oxide or chromium oxide) on one side or on both sides.
  • the tear-off film can have a surface finish on one side or both sides, for example etching, blasting, anodizing, passivating, etc. (in particular on the application side).
  • the tear-off foil is a commercially available metal foil in the form of a roll, which is made available unpackaged. The required sections are cut to length, cut to size and applied to the component.
  • the tear-off film can preferably have a protective film or protective paper on one side or on both sides, whereby the cleanliness of the application surface is guaranteed. Unintentional contamination of the surface during transport, storage and processing can be avoided by the protection. The protection is removed immediately before the application.
  • the plastic material can be, for example, epoxy-based materials (epoxy resin), duromers (eg polyethers, epoxy resins, vinyl esters, unsaturated polyesters, phenolic resins, etc.), thermoplastics and / or elastomers.
  • the tear-off foil can be a pure metal foil or ceramic foil, which is or is produced, for example, in a metallic or ceramic rolling process.
  • the carrier material of the tear-off film and the application side are formed together from the metallic or ceramic material.
  • the metal foil therefore consists mainly of a metal material
  • the ceramic foil therefore consists mainly of a ceramic material.
  • the tear-off film can also be provided with a metallic or ceramic coating on the application side.
  • the carrier material of the tear-off film is not a metal or ceramic material, but a different material, for example a plastic material (the carrier material is a plastic film).
  • the carrier material of the tear-off film is coated with a metallic or ceramic material on the application side, so that a metallic or ceramic surface is formed.
  • a fiber composite material is used as the component material, which has a fiber material and a matrix material that embeds the fiber material as plastic material in order to produce a fiber composite component.
  • the component substrate can be a fiber preform made of fiber material, the tear-off film being applied to a fiber preform made of dry fiber materials or pre-impregnated fiber materials.
  • the dry fiber materials are then infused with matrix material in an intermediate step. The matrix material contacts the applied tear-off film.
  • a vacuum build-up is created over the component substrate after the metal foil has been applied, in order to evacuate the component substrate and, if necessary to infuse the matrix resin.
  • the component substrate is then cured under the vacuum build-up by temperature control and, if necessary, pressurization.
  • At least one material is applied in the application section after the metal foil has been peeled off.
  • a material can preferably be an adhesive, with at least one further component being glued on by means of the adhesive in the application section after the adhesive has been applied.
  • the joining partner can be a lacquer or a coating.
  • the application of the material to be applied e.g. adhesive, varnish, coating
  • the material to be joined can, however, also be a fiber composite material, with no separate adhesive layer being applied. Rather, the adhesive connection to the component surface activated by peeling off the tear-off film is produced by the matrix material of the composite material.
  • the fiber composite material is applied as an uncured prepreg to the pretreated surface or applied as a dry fiber material and then grounded with matrix material. During the consolidation of the matrix material, the adhesive bond is produced by the hardening matrix material.
  • a separating material is introduced in at least one area of the application section between the substrate and the tear-off film in order to prevent the tear-off film from being connected to the substrate in this region.
  • This area can be, for example, an edge area of the tear-off film, so that the tear-off film is particularly easy to peel off after the plastic material has been consolidated in this region. So creates a flap with the help of which the tear-off film can be peeled off from the component substrate.
  • a tear-off film which has at least one linear predetermined breaking point, or that at least one linear predetermined breaking point is generated in the tear-off film, so that a plurality of segments are generated, the tear-off film segment by segment, with the linear predetermined breaking point being severed is peeled off from the component substrate.
  • the presence of such a predetermined breaking point ensures that the tear-off film can be applied to the component substrate in one piece and then peeled off in strips.
  • One possible production method is the rolling in of notches at intervals evenly distributed over the width of the film, which represent a material weakening of the tear-off film and thus determine the course of the tear when peeling off in strips.
  • a separating material between the tear-off film and the substrate can be introduced at one end of each segment in order to form a pull tab for each segment.
  • a tear-off film which has a plurality of individual segments that are connected to one another by means of a common carrier material on a rear side of the segments facing away from the component substrate, or that a plurality of individual segments with a common carrier material are connected to one another on a rear side facing away from the component substrate, the segments being peeled off from the component substrate by severing the carrier material between two segments.
  • the tear-off film consists of individual segments that are separate and separate from one another, the segments being connected to one another by means of a common carrier material.
  • the tear-off film can be applied to the component substrate in one piece, in which case strip-shaped peeling of the individual segments (peeling off in segments) is possible.
  • the individual and separate segments in front of each other can lie flush with one another or be arranged in an overlapping manner.
  • a tear-off film is provided which has a reinforcing layer on a rear side facing away from the component substrate, or that a reinforcing layer is applied to a rear side of the tear-off film facing away from the component substrate.
  • the reinforcement layer is a flat reinforcement textile.
  • the reinforcement layer has a material that is different from the material of the tear-off film.
  • the tear-off film is provided entirely without a reinforcement layer.
  • the tear-off film can be a flat structure produced in a rolling process that is in contact with the reinforcement layer.
  • the metal is applied to the reinforcement layer as a metal layer or metal oxide layer in a chemical, electrochemical or physical deposition process. If the reinforcement layer is a plastic film, it can be metallized on one or both sides, i.e. a thin, continuous metal coating or metal oxide coating is applied by a deposition process.
  • connection between the reinforcement layer and the metallization is designed in such a way that the structure can be peeled off from the component surface without leaving any residue. So there are no metallic particles left on the component surface after the peeling process.
  • the reinforcement layer or the flat reinforcement textile makes contact with the tear-off film.
  • the flat reinforcing textile can be, for example, a woven fabric, knitted fabric or a fleece.
  • the reinforcement layer or the flat reinforcement textile can be laid on loosely and connected to the tear-off film during the subsequent processing process, for example by impregnation with matrix material.
  • the reinforcement layer or the flat reinforcement textile can, however, also be firmly connected to the tear-off film at the time it is made available.
  • the reinforcement layer or the flat reinforcement textile can be glued to the back of the tear-off film, with this connection being sufficiently flexible is in order to be able to drape the tear-off foil on a complex surface geometry.
  • the reinforcement layer or the flat reinforcement textile gives the tear-off film increased strength and prevents the tear-off film from tearing, while at the same time maintaining the flexibility of the tear-off film so that it can simply be peeled off.
  • the reinforcement layer can be formed, for example, from a plastic layer or plastic film made from a duromer, thermoplastic or elastomer.
  • a tear-off film which has a functional coating on the application side facing the component substrate, or that a functional coating is applied to the application side of the tear-off film facing the component substrate.
  • the coating remains at least partially on the component substrate after the tear-off film has been peeled off and takes on further functions.
  • the coating can be, for example, an adhesion-promoting substance which, when the tear-off film is peeled off, causes a break in the plastic material, for example in the matrix material of the fiber composite material.
  • it can also be a coating that remains wholly or partially on the component substrate and the later component, ie the coating can break cohesively when peeled off or it can completely detach from the tear-off film.
  • the color of the coating can be designed in such a way that it contrasts with the color of the component substrate or the subsequent component. This is advantageous for the following joining operations in order to identify the joining zone.
  • the coating material remaining on the component substrate can take on special functions.
  • the coating can produce crack-stopping properties in a bond made on it through a material heterogeneity.
  • a tear-off film which has a structuring, in particular a microstructuring, or that such a structuring, in particular a microstructuring, is produced.
  • the structuring can in particular be provided or manufactured in such a way that, after the tear-off film has been peeled off, a structured surface is produced on the component substrate.
  • the structuring can be provided or generated on the application side facing the component substrate.
  • the tear-off film can have a microstructuring in such a way that it results in a type of positive fit (micro-positive fit) with the plastic material, which when peeled off produces a cohesive fraction of fracture on the surface of the plastic material.
  • Such a structuring can be designed in such a way that unevenness and / or complex geometries (multiple curved) of the surface of the component substrate can be covered flat with the tear-off film.
  • the structuring forms a material reservoir with the help of which the tear-off film can be stretched to a certain extent. In this way, unevenness can be leveled out, as the tear-off film can also be laid flat in depressions or over elevations.
  • the material reservoir thus serves to provide additional film material to compensate for unevenness in the application section of the component substrate.
  • the structuring is preferably carried out in the direction of the side of the tear-off film facing away from the building part substrate.
  • the tear-off film can advantageously have one or more holes or perforations, which are used for the escape of excess plastic material, in particular matrix material in an infusion process.
  • the openings or holes are so small that plastic material that has passed through breaks cohesively when the metal foil is peeled off.
  • An imprint of the material located over the metal foil is undesirable in the area of the holes, since otherwise a surface is created that has irregular areas which may not be well suited for an adhesive process.
  • the component surface can have elevations in the area of the holes, the height of which depends on the hole diameter and the special structure of the film. Depending on the requirements of the subsequent joining process, the height of the elevations and the number and distribution of the elevations can be set via the design of the film.
  • a low elevation may be desirable, which is achieved in particular by a small hole diameter.
  • larger elevations typically in the range between 100 ⁇ m and 300 ⁇ m for structural bonds, may be desirable.
  • These elevations can serve as spacers between the two components so that the adhesive applied between the components has a fixed and precisely defined adhesive layer thickness.
  • the elevations prevent in particular that too much of the applied adhesive is pressed out of the joining zone and the required adhesive layer thickness is not reached. Rather, the second component can be pressed against the first component until it contacts the resin-rich elevations of the first component. This ensures an adhesive layer that is equal to the height of the elevations.
  • the tear-off film can be folded over in a U-shape at at least one edge region for simply peeling off the tear-off film from the component sub.
  • the upper part of the folded-over area therefore does not contact the plastic material and can be used as a pull tab after the consolidation.
  • Special elements can also be applied to the top of the tear-off film in the edge area to enable the peeling process to begin.
  • the peeling off of the tear-off foil advantageously leads to an adhesive break between the tear-off foil and the plastic material or to a cohesive break close to the surface. In both cases, the surface can be easily bonded.
  • the tear-off foil can be cut in an edge section so that the metal foil can be peeled off in strips from the component, which reduces the effort required.
  • the tear-off film can be applied over a large area to the component substrate or only in special areas in which a joining operation with appropriate materials is to be carried out later. If the tear-off film is only applied in particularly limited application sections, the remaining areas of the component substrate can be applied with dry or pre-impregnated tear-off fabric. The tear-off fabric is left out in the application section of the tear-off film or the tear-off fabric is arranged over the tear-off film. In this way, a firm connection between the tear-off fabric and the back of the tear-off film can be created, whereby the tear-off film can be peeled off at the same time when the tear-off fabric is peeled off later.
  • the metal foil can be arranged on a molding tool surface of the molding tool.
  • the metal foil is applied to an open side of the component substrate that does not face the molding tool.
  • the object is also achieved according to the invention with the component according to claim 14, wherein the component comprises a plastic material and is produced according to the method described above.
  • the component can be, for example, a fiber composite component which is produced from a fiber composite material comprising a fiber material and a matrix material which embeds the fiber material.
  • the plastic material on the film can be identical to the matrix material of the component to be consolidated, or it can differ in the chemical formulation.
  • the object is also achieved with the tear-off film according to the invention for use in the method described above, where the tear-off film has a layer of, in particular, uncured plastic material on an application side facing the component substrate.
  • the tear-off film is then applied to the application section of the component substrate and the plastic material is consolidated, so that the tear-off film is connected to the plastic material of the sub-substrate via the plastic material.
  • the tear-off foil can be a metal foil or a ceramic foil. It is also conceivable, however, that the tear-off film has a film-like carrier material that is provided with a metallic or ceramic coating on the application side.
  • FIG. 2 shows a schematic representation of an embodiment
  • FIG. 3 shows a schematic representation of a cross section of a metal foil in a particular embodiment
  • Figure 4 is a schematic representation of a plan view of a segmented metal foil.
  • the tear-off foil is a pure metal foil.
  • the exemplary embodiments described can also be carried out with other films.
  • FIG. 1a shows a component substrate 10 which, in the embodiment of FIG. 1a shown, can be, for example, a fiber composite component which has not yet been fully consolidated. Accordingly, the component substrate 10 can be a fiber preform which is formed either from dry fiber material or from pre-impregnated fiber material.
  • a metal foil 20 was applied to the provided component substrate 10 within an application section 12 of the component substrate 10 in order to prepare the surface of the application section 12 for a later joining operation.
  • a reinforcing textile 30 is arranged on the metal foil 20, which does not disturb the pliable character of the metal foil 20 and is intended to support the metal foil 20 with regard to its tear resistance when it is torn off or peeled off.
  • the plastic material 14 contained in the component substrate 10 is consolidated or cured. If the component substrate 10 was provided in the form of dry fiber materials, thus, in an infusion process, not shown, the plastic material 14 can be infused into the component substrate 10 in the form of a matrix material, the application side 22 of the metal foil 20 being wetted and contacted during the infusion. In the case of pre-impregnated fiber materials, the metal foil 20 would be placed with its application side 22 directly on the plastic material 14 already contained in the fiber material and thus contacted.
  • the metal foil 20 is peeled off from the application section 12 of the component substrate 10, as shown in FIG.
  • the surface generated in this way has reactive groups that are aligned in the direction of the surface and are available for the formation of new adhesive bonds, e.g. with an applied adhesive or varnish.
  • the bond between the plastic material 14 and the metal foil 20 is so weak that the metal foil 20 can be pulled off with little effort. It has been shown that even then the adhesively broken surface of the component substrate 10 is reactive, has a high surface energy and can easily be wetted.
  • the bond between the plastic material 14 and the metal foil is strong, greater force is required when peeling off. This can ultimately lead to a partially or even completely cohesively broken surface of the console Dated plastic material 14, which is also very suitable for subsequent Kle beroperationen, since the cohesive break leads to free radicals on the surface.
  • Such a higher bond between the plastic material 14 and the metal foil 20 can be achieved, for example, by microstructuring the metal foil 20 (formation of a micro-form fit) or by surface activation of the metal surface.
  • a further component 40 can be glued to the surface of the application section 12 activated in this way by means of an adhesive layer 41.
  • the adhesive 41 can also be the matrix material of the fiber composite component.
  • FIG. 2 shows an exemplary embodiment in which openings 24 are provided in the metal foil 20 so that excess plastic material (indicated by the arrows) can be discharged through the openings 24.
  • the excess plastic material can be absorbed, for example, via a fabric placed over the perforated metal foil
  • FIG. 3 shows a schematic representation of an embodiment of a metal foil 20 which has a protective foil 28 on its lower application side 22 for protection against contamination.
  • the reinforcing textile 30 is provided on the opposite side, with a protective paper 32 being arranged on the reinforcing textile 30.
  • the metal foil 20 can be rolled up as roll goods on a roller or core.
  • the metal foil 20 has a plurality of predetermined breaking points 26 in the form of rolled-in notches which serve to form a desired and predetermined material weakening in these areas.
  • the entire metal foil is divided into a multiplicity of metal foil segments 20a-20d, as a result of which the metal foil can be applied to the component substrate in one piece, but can be peeled off from it in segments.
  • This is shown schematically by way of example in FIG.
  • a separating film 34 which is intended to prevent the metal film 20 from being connected to the plastic material of the component substrate 10, so that a pull tab 36 can be formed individually for each segment.
  • each segment can be peeled off from the component substrate 10 one after the other, the metal foil 20 tearing at the predetermined predetermined breaking points 26.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé de production d'un constituant à partir d'un matériau de constituant comprenant au moins une matière plastique, le procédé comprenant les étapes suivantes consistant : à fournir un substrat de constituant à partir duquel doit être produit le constituant ; à appliquer une feuille métallique sur le substrat de constituant dans au moins une section d'application ; à consolider la matière plastique contenue dans le substrat de constituant de telle sorte que la feuille métallique est liée à la matière plastique consolidée dans la section d'application ; et à décoller la feuille métallique du substrat de constituant après la consolidation.
EP20753311.8A 2019-08-09 2020-07-31 Procédé de production d'un constituant et constituant de ce dernier Pending EP4010176A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019121563.3A DE102019121563A1 (de) 2019-08-09 2019-08-09 Verfahren zur Herstellung eines Bauteils sowie Bauteil hierzu
PCT/EP2020/071684 WO2021028242A1 (fr) 2019-08-09 2020-07-31 Procédé de production d'un constituant et constituant de ce dernier

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