• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a composite material (1) for the manufacture of a reinforcing element by thermoforming for lightweight construction. It comprises a cellulose core (10) from a corrugated paper web (12) and a Kraft cover paper mechanically connected to the corrugated paper web (12), which in turn comprises sheet of paper (14, 22). An adhesive layer (30) is disposed between the flat paper web (22) of the Kraft paper cover and the core (10), which is provided to mechanically bond the flat paper web (22) of the Kraft paper cover paper in the heart (10). In addition, the present invention relates to a reinforcing element made of the composite material for lightweight construction and a method of manufacture suitable for this purpose.
    公开号:FR3036647A1
    申请号:FR1670263
    申请日:2016-05-25
    公开日:2016-12-02
    发明作者:Thorsten Hornich；Christoph Nachbaur
    申请人:Carcoustics Techconsult GmbH；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a reinforcing element for lightweight construction, particularly for automotive construction, which is suitable for mechanically reinforcing and / or damping the vibration tendency of flat parts. In addition, the present invention relates to a method of manufacturing such a reinforcing element. Uniseal, Inc., in Evansville, Indiana, USA, has developed a process applied, for example, in the automotive industry to dampen the vibrations of flat parts such as those of the roof panel of a motor vehicle. This method is based on the integration of a heavy elastomer layer directly on the part to be damped of the vehicle body. For this purpose, for example, a still liquid elastomer mass is applied to the part to be damped, for example by injection or extrusion. The applied layer is then cured / crosslinked. It is furthermore known that the vibration tendency of flat parts in automobile construction can be reduced by bonding the workpiece to the surface with a woven fiberglass mat. For example, the company Dow Automotive (USA) markets under the name BETABRACETm, a corresponding self-adhesive fiberglass mat that is intended specifically for this application. The composite part from the resulting flat piece, adhesive layer and fiberglass mat exhibits a strongly modified vibration behavior with respect to both the possible resonance frequencies and the intrinsic damping of the vibrations. vibrations too. Therefore, the effectiveness of such reinforcing elements when thin fiberglass mats are used is not sufficient for all cases of application. The use of thicker fiberglass mats certainly enhances the effectiveness of the reinforcing element, but it results in an unfavorable increase in the total weight of the reinforcing element. The applicant of this application is pursuing a similar concept with the reinforcement elements marketed under the name "CC-Brace", which are based on a metal film lined with a layer of pressure-activated adhesive. These reinforcing elements are similarly employed to Dow Automotive's aforementioned BetaBraceTM reinforcing elements. But even the "CC-Brace" type reinforcing elements are subject to the above-mentioned limitations. The object of the present invention is to propose a new type of reinforcing element which avoids the aforementioned drawbacks.
    [0002] The object is further to provide a composite material which is suitable for making such a reinforcing element and an advantageous manufacturing method for such a reinforcing element. This object is solved by a composite material according to the invention, a reinforcement element according to the invention, as well as a method according to the invention. An advantageous application of a reinforcement element according to the invention is also provided. A composite material according to the invention is provided for the manufacture of a reinforcing element for lightweight construction by thermoforming. It comprises a cellulose-based core from a corrugated paper web as well as a Kraft paper cover mechanically connected to the corrugated paper web, which in turn comprises a flat paper web. The flat paper web of Kraft cover paper typically has a basis weight of 100 g / m 2, preferably greater than 150 g / m 2 and particularly preferably greater than 200 g / m 2. According to the invention, a thermally activatable and hard-plastic curing adhesive layer is now provided disposed between the Kraft paper cover paper web and the core, which is provided in the activated state, to connect mechanically the paper paper plane of Kraft paper cover in the heart, especially to the corrugated paper of the heart.
    [0003] A composite material according to the invention has particular advantages for thermoforming. The thermally activatable and hard-plastic curing adhesive layer also has a good mechanical flexibility in the hot state, so that a thermoformed part produced by using the composite material can also be removed from the tool used for processing. thermoforming in the hot state or only slightly cooled, without losing its three-dimensional contour produced by thermoforming. A cooling step reducing the clock times, e.g. in the open molding tool, to wait for sufficient cooling of the piece produced, is no longer necessary. In addition, the piece produced is very light and can still have high mechanical stability. A flat piece made in this way has a very high vibration resistance perpendicular to its surface. This is particularly true when the core comprises a corrugated paper web and the corrugated structure extends in a plane which is oriented parallel to the flat paper web of the Kraft paper cover. For this, "mountains" or "valleys" of the corrugated structure can be directly connected to the flat paper web of the Kraft cover paper by means of the adhesive layer. In another orientation of the corrugated paper web also, high vibration resistances can be obtained transversely to the plane of elongation. A reinforcing element according to the invention for lightweight construction, which can be manufactured by using a composite material according to the invention, for example by means of a thermoforming process, comprises a cellulose-based core from a corrugated paper web and a Kraft cover paper mechanically connected to the corrugated paper web, which in turn comprises a paper web. According to the invention, it is provided that the flat paper web of the Kraft cover paper is mechanically connected to the core by means of, for example, a layer of thermoset duroplastic adhesive. The reinforcing element thus achieves the aforementioned advantages regarding its ability to be manufactured by thermoforming as well as its lightness and resistance to vibration. It is therefore excellent for damping large, extensively elongated parts which often have an increased tendency to transverse vibrations. Thus, it is particularly suitable for use in the construction of bodies, e.g. for reinforcing the roof surface of a motor vehicle. A reinforcing element according to the invention can not only have a durable three-dimensional contour but even more so, it can have areas in which the material thickness of the composite material is reduced locally in a targeted manner, e.g. in the form of a peripheral sealing edge which, because of its mechanically increased rigidity, is also suitable for fastening the workpiece to the bodywork of a motor vehicle, eg on a roof plate, e.g. Likewise, targeted local areas with reduced material thickness can be formed in the surface of the three-dimensional contouring member, where increased mechanical flexibility is required, e.g. on mounting points, breakthroughs for passing lines of any type or for marking reinforcing ribs, e.g. to reduce the vibration tendency of the room itself. In a preferred improvement, the core of a composite material according to the invention or a reinforcing element according to the invention comprises at least two corrugated paper webs and a flat paper web which are glued together in a paperboard. corrugated, wherein the flat paper web is disposed between the corrugated paper webs. It is also conceivable to use an even larger number, e.g. of three, four or more corrugated paper webs between which a paper web is disposed respectively. To this end, it has proved to be particularly advantageous for a machining capacity in a thermoforming process, regardless of the number of corrugated paper webs present, that the paper webs of the corrugated board are connected by means of layers of paper. heat-resistant adhesive, preferably by means of hardened thermoplastic adhesive layers. In another advantageous improvement of a composite material or reinforcing element according to the invention, the flat paper web of the Kraft paper cover paper is at least further reinforced by fibers, e.g. by glass fibers, carbon fibers, aramid fibers and / or natural fibers, e.g. cotton, flax, hemp, jute, kerf, sisal or cellulose fibers. This thus produces a particularly high tensile strength of a part made by using the composite material, respectively the reinforcing element in its plane of elongation. The use of a fiberglass-reinforced core has also been found to be advantageous. In another advantageous improvement which is distinguished by further improved vibration resistance, the flat paper web of the Kraft cover paper in the composite material or reinforcing element according to the invention comprises a surface density-increasing filler material. of the paper. The use of BaSO4 has proved to be particularly suitable in this case for example. In addition, it has been found advantageous for decorating purposes that the Kraft cover paper of the composite material or reinforcing element according to the invention comprises a thermoplastic cover layer, for example made of polypropylene, polycarbonate or polyamide. acrylonitrile butadiene styrene but also polyethylene, polyethylene terephthalate, polybutylene terephthalate, polyurethane, thermoplastic, polyacetal, polyphenylene sulfide, cycloolefin copolymer, thermotropic polyester and mixtures thereof. For this, the thermoplastic cover layer in the composite material can also be designed as a separate layer which mechanically bonds to the Kraft cover paper in a thermoforming process. For this, the thermoplastic cover layer in the composite material or the reinforcing element and disposed outside and thus forms a decorative surface which in this way can be designed in a colored and / or visually corresponding manner. For this purpose, the melting of the thermoplastic plastic in the thermoforming process produces a direct bond between the thermoplastic cover layer and the Kraft cover paper in the heated press. If a thermoplastic cover layer is further combined with an outer textile layer, e.g. in a nonwoven, the thermoplastic layer may also be provided as a heat-activatable adhesive layer for bonding the formed thermoforming part to the textile layer. In such a case, the thermoplastic layer may consist in particular of a thin thermoplastic film or also e.g. a layer diffused from an adhesive powder by hot melting. In another advantageous improvement, the composite material according to the invention, respectively the reinforcing element according to the invention comprises two Kraft cover papers which in turn respectively comprise a flat paper web, in which the core is disposed between the paper webs of the Kraft cover papers and is connected thereto by means of a layer of thermoset duroplastic adhesive, respectively. It should be noted that in the case of the composite material, the mechanical bonding through the cured adhesive layer is formed if necessary first in the piece made from the composite material by thermoforming and does not place still in the composite material itself. Particular advantages as to the practical workability of a reinforcing element according to the invention are provided when the reinforcing element further has a pressure-activated adhesive layer which can be arranged e.g. on the side of the reinforcing member 35 diverted from the Kraft cover paper. But an arrangement on the outer surface of the Kraft cover paper is also advantageous. In these embodiments, the reinforcing member may be mounted by simply pressing the workpiece onto the workpiece to be reinforced, e.g. the roof surface of a vehicle body, e.g. in the context of automobile production. Due to its low weight, large reinforcement elements can be handled by assembly personnel easily without mechanical support. A method according to the invention is used to manufacture a reinforcing element for lightweight construction. It presents at least the following process steps: 1) supply of a composite material comprising the following components: a) a cellulose-based core from a corrugated paper web, b) a bound Kraft paper backing paper mechanically to the corrugated paper web, which comprises a flat paper web, c) a hardened thermosetting and duroplastic adhesive layer which is disposed between the core and the paper web, Kraft paper cover, 2 ) introducing the composite material into the cavity of a heated molding tool, and 3) thermoforming the composite material by thermosetting the adhesive layer so that it bonds the core and the Kraft cover paper mechanically between them. The process according to the invention particularly allows, e.g. from a composite material according to the invention, which may also correspond to one or more of the advantageous improvements explained above, to manufacture a reinforcing element according to the invention, which, if appropriate, may also correspond to one or more many of the advantageous improvements described above. It makes it possible to achieve high rates of turnover, since no additional residence time of the manufactured thermoformed part is necessary because of its higher form stability also in the hot state in the molding tool. . Optionally, the thermoformed hot composite material may, in an additional process step, be transported to a cooling station where the thermoformed composite material remains until its temperature has fallen to a predetermined set temperature.
    [0004] In an advantageous improvement of the process according to the invention, a cutting of the thermoformed composite material is carried out in an additional process step. This cutting can take place in particular in the molding tool itself. The molding tool can have appropriate cutting, stamping or nipping tools suitable for this purpose. In a particularly advantageous development of the process according to the invention, in an additional process step, the surface of the thermoformed composite material diverted from the Kraft cover paper is, for example, provided with a pressure activatable adhesive layer, which may be coated with a peelable coating. This most simply produces a reinforcement element to be applied by pressure on the workpiece to be damped, manually or automated. Optionally, the pressure-activatable adhesive layer may be disposed also on the outer surface of the Kraft cover paper. In the context of the process according to the invention, the composite material introduced into the cavity of the molding tool can receive not only a durable three-dimensional contour, but it is also possible to reduce the thickness of material of the composite material locally so that targeted eg to produce for example a peripheral sealing edge which, because of its mechanically increased stiffness, is also suitable for attachment of the workpiece to the body of a motor vehicle eg on a roof sheet eg. Similarly, targeted local areas with reduced material thickness can be formed in the surface of the three-dimensional contour piece, where increased mechanical flexibility is required, e.g. at mounting points, breakthroughs for passing lines of any type or for also marking reinforcing ribs, e.g. to reduce the vibration tendency of the room itself. The present invention therefore relates to a composite material for the manufacture of a reinforcing element by thermoforming for lightweight construction, having the following attributes: a. a cellulose-based core from a corrugated paper web, b. a Kraft cover paper mechanically connected to the corrugated paper web, which comprises a flat paper web, characterized by c. a heat-activatable, duroplastic curing adhesive layer disposed between the Kraft paper cover paper web and the core, which is provided, in the activated state, to mechanically bond the paper plane paper web. Kraft cover in the heart. It also relates to a reinforcing element for lightweight construction, having the following attributes: a. a cellulose-based core from a corrugated paper web, b. a Kraft cover paper mechanically connected to the corrugated paper web, which comprises a flat paper web, characterized in that c. the flat paper web of the Kraft cover paper is mechanically connected to the core by means, for example, of a layer of thermoset duroplastic adhesive.
    [0005] The composite material or reinforcing element is further characterized in that: - the core comprises at least one corrugated paper web and one flat paper web which are bonded together in a corrugated cardboard; the paper webs of the corrugated board are connected by means of 15 hardened duroplastic adhesive layers; - The flat paper web of Kraft cover paper is reinforced with fibers; the flat paper web of the Kraft cover paper comprises a filling material raising the surface density of the paper web; The core is reinforced with fibers; the Kraft cover paper comprises a thermoplastic cover layer; the composite material the reinforcing element comprises two Kraft cover papers which in turn comprise a flat paper web, in which the core is disposed between the paper webs of the Kraft paper and can be connected to connected thereto respectively by means of a hardened / thermosetting duroplastic adhesive layer. The reinforcing member is characterized by having a pressure-activated adhesive layer disposed on one side of the reinforcing member diverted from the present Kraft cover paper. The invention also relates to the use of a reinforcing element in the construction of bodies for reinforcing and / or damping vibrations of flat parts.
    [0006] The invention further relates to a method of manufacturing a reinforcing element for lightweight construction, having the following process steps: a. providing a composite material comprising the following components: i. a cellulose-based core from a corrugated paper web, ii. a Kraft cover paper mechanically connected to the corrugated paper web, which comprises a flat paper web, iii. a hardened thermosetting and duroplastic adhesive layer which is disposed between the core and the paper web of the Kraft cover paper, b. introducing the composite material into the cavity of a heated molding tool, c. thermoforming the composite material by thermosetting the adhesive layer such that the adhesive layer connects the core and the Kraft cover paper mechanically with each other. Said method is further characterized in that: in an additional process step, a cutting of the thermoformed composite material is performed; the cutting is carried out in the molding tool; in an additional process step, the thermoformed composite material is transported to a cooling station where the thermoformed composite material remains until its temperature has fallen to a predetermined set temperature; the composite material provided corresponds to a material characterized in that the core comprises at least one corrugated paper web and one flat paper web which are glued together in a corrugated cardboard or the corrugated paper webs are connected to the web. Hardcracked layers of hardcrystalline adhesive or flat paper web of Kraft roofing paper is fiber-reinforced or flat paper web of Kraft roofing paper includes a fill material raising the surface density of the paper web or the paper. The core is fiber-reinforced or the Kraft cover paper comprises a thermoplastic cover layer or the composite material the reinforcing member comprises two Kraft cover papers which in turn respectively comprise a flat paper web, wherein the core is disposed between the paper webs of the Kraft paper and can be connected / connected thereto by means respectively of layer of hardened / thermosetting hard thermoplastic adhesive; In an additional method step, the surface of the reinforcement element diverted from the Kraft cover paper is provided with a layer of pressure-activated adhesive. Other advantages and characteristics of the composite material according to the invention, the reinforcement element according to the invention as well as a possible use, as well as a method for producing an advantageous reinforcing element are provided by the examples of achievement referred to below. These must not be understood as being limiting but serving to explain the invention to a person skilled in the art.
    [0007] It should be noted that all the attributes of the advantageous arrangements and improvements described above of the composite material according to the invention, of the reinforcing element according to the invention as well as of the manufacturing process can be combined on the plane. technically reasonable, without this being explicitly mentioned in the present description of the invention. This also applies to the attributes of the exemplary embodiments described below, which are explained in more detail with the help of the figures, in which: FIG. 1 is a diagrammatic representation of a section of a composite material according to FIG. 2 is a schematic representation of a method for manufacturing a composite material according to the invention, FIG. 3 - 4 is a schematic representation of a manufacturing method according to the invention for manufacturing a reinforcing element according to the invention. FIG. 5 illustrates the reinforcement element according to the invention manufactured according to the method of FIGS. 3 and 4, FIG. 6 is a second embodiment of a reinforcement element according to the invention, and FIG. 7 is a diagrammatic representation of a section of another composite material according to the invention. FIG. 1 shows a schematic representation of a section through a composite material. according to the invention which comprises a cellulose-based core 10 which is made from a corrugated paper web 12 which is bonded with a flat paper web 14 also made of corrugated cellulose. The corrugated structure thus extends in the plane of the plane paper web 14. The bonding of the flat paper web 12 and the corrugated paper web 14 is thus designed to withstand the temperatures in the molding tool 3036647 - 11 - hot during the thermoforming process that follows. The use of a duroplastic adhesive has been proven for example for this purpose. In addition, the composite material 1 comprises a Kraft cover paper 20 mechanically connected to the corrugated paper web 12, which consists of a flat paper web 22 in the exemplary embodiment shown. The Kraft cover paper is coated with a layer of hardened hardenable and curable adhesive which is disposed in the composite material 1 between the core 10 and the paper web 22. The adhesive layer 30 may For example, it is based on thermo-crosslinkable polyurethane foam which is projected onto the surface of the flat paper web 22. The adhesive layer 30 also provides, in the uncured state, adhesion of the flat paper web 22 of the Kraft cover paper. The flat paper web 22 of the Kraft cover paper is also cellulose based and has a basis weight of about 200 g / square meter. The thickness of the flat paper web 22 is about 0.5 mm. The cellulose material of the flat paper web 22 is loaded with barium sulfate to obtain the indicated weight per unit area with the indicated material thickness.
    [0008] The two flat paper webs 14, 22 are reinforced with natural cellulose fibers. FIG. 7 shows a second exemplary embodiment of a composite material 1 according to the invention, the construction of which corresponds essentially to that of the composite material 1 according to FIG. 1, in which however the core 10 comprises two corrugated paper webs 12 and a flat paper web 14 which are glued together in a corrugated cardboard, wherein the flat paper web 14 is disposed between the corrugated paper webs 12. The corrugated paper webs 12 of the corrugated paperboard are connected to the flat paper web 14 by means of heat-resistant adhesive layers 18, which may be made of, for example, a cured thermoplastic polymer-based adhesive. The use of such a core to manufacture the reinforcing element according to the invention has been particularly proven in practice. A suitable method for making a composite material 1 according to the invention is shown diagrammatically in FIG. 2. The flat paper web 22 forming the Kraft cover paper 20 is unwound from a backup roll 24 and conveyed in front of a nozzle. By means of this nozzle 32, a thermo-crosslinkable polyurethane foam is projected onto the entire upper surface of the flat paper web 22. Next, the flat paper web 22 of the Kraft paper 20 now coated with a layer of duroplastic thermosetting adhesive 30 is fed to a rolling station in which the Kraft cover paper 20 coated with the adhesive layer 30 is joined with the core 10, also unwound from a reserve roll 16, which is formed as corrugated cardboard according to Figure 1. For this sufficient pressure is exerted on the composite material 1 which occurs, so as to provide a certain adhesion of the d The flat paper 22 of the Kraft cover paper 20 on the corrugated paper web 12 of the core 10 by means of the thermosetting and duroplastic adhesive layer in the cured state. Then, the composite material 1 thus produced is transported to a cutting station 90 in which it is cut lengthwise by means of a cutting tool 92 to continue machining sections of suitable material of the composite material 1. To manufacture reinforcing elements 100 according to the invention, with the method according to the invention, sections cut in length of the composite material 1 according to the invention are provided. The cut sections of the composite material 1 consisting of the Kraft cover paper 20, the adhesive layer 30 and the core 10 are then subjected to a thermoforming process which is explained schematically with reference to FIGS. 4. The thermoforming process schematically shown in Figures 3 and 4 to form a reinforcing member 100 according to the invention on the basis of a composite material 1 according to Figure 1 is performed by means of a molding tool 70 the two mold halves 72, 74 are heated. The temperature of the tool is set at about 180 ° C for the thermoforming process, knowing that the temperature of the tool is essentially determined by the activation temperature of the adhesive layer 30. The cut sections of the material composite 1 are placed in the open cavity 76 of the molding tool 70 (see Figure 3), whereupon the molding tool 34 is closed as shown in FIG. 4. The molding tool 34 receives an appropriate closing force and is kept closed for a suitable duration which is typically between 20 and 200 seconds. The temperature in the molding tool and the closing time of the molding tool 70 are so adjusted that the adhesive layer 3036 is thermally activated and hardens duroplastically, knowing that it connects the This has the particular consequence that the composite material 1 follows the marked three-dimensional contour of the molding tool 70. At the same time, the adhesive layer 30 which has reacted fixes the composite material 1 marked form in the marked form, because of its duroplastic properties now. The reinforcement element 100 thus produced, optionally provided with a three-dimensional contour, thus retains its marked shape when it is taken out of the molding tool 70 in the hot state. high clocking cycles in the thermoforming process. In a preferred improvement, not shown here, different or more outer but also inner surfaces of the core are further coated with a thermosetting, preferably hard-plastic hardening material, e.g. a melamine resin or a polyurethane foam. These layers also harden in the thermoforming tool and impart to the fabricated reinforcing member additional form stability, particularly in the hot state. Then, the molding tool 70 is opened (not shown) and the still hot reinforcing element 100 now having a three-dimensional contour is taken from the molding tool 70 without cooling. Finally, the reinforcement element 100 with a three-dimensional contour, which is shown schematically in FIG. 5, is transported to a cutting station (not shown) in which a cut is made on the edges. Optionally, die cuts are made subsequently or in parallel, e.g. to form mounting apertures in the reinforcing element 100. In an advanced execution of the method, provision is furthermore made to provide the molding tool 70 with cutting tools and the stamping expiry case, in order to cut the reinforcement element 100 produced as well as to introduce, where appropriate, the desired punch cuts. However, this is not shown in FIGS. 3 and 4. However, it can be seen in FIG. 3 and 4 that the mold halves 72, 74 of the molding tool 70 are provided with marking edges 78 which serve to provide the composite material 1 placed in the cavity 76 with a peripheral marked edge 60, in which the material thickness of the reinforcing member 100 manufactured is significantly reduced. Preferably, the thickness of material in this area is reduced to the point that the core 10 has substantially no more chambers filled with air. Finally, FIG. 6 shows a second exemplary embodiment of a reinforcing element 100 according to the invention which is planarly designed, unlike the first embodiment according to FIG. 5. The mounting of the reinforcing element 100 according to this second embodiment Exemplary embodiment corresponds to that of the first embodiment with the difference that the upper surface of the reinforcing element 100 is coated with a decorative layer 50 made from a polyethylene film 10 with a thickness of 50 microns. This is preferably brought during the manufacture of the reinforcing element 100 also to the cavity 76 of the molding tool 70, where appropriate by being unwound from a reserve roll (not shown). In the closed molding tool 70, the thermoplastic decorative layer 50 melts and binds to the adjacent surface of the composite material 1. By varying the decorative layer 50 by the material, the material thickness, the state of the material, color etc., it is possible to realize various qualities and surface structures. On the underside, the reinforcing member 100 is provided according to the second embodiment with a pressure activatable adhesive layer 40 which is coated with a coating (not shown). The reinforcing element 100 may, by means of the adhesive layer 40, be fixed in place and on the part to be reinforced, for example the roof sheet of a motor vehicle by a simple mechanical pressure, knowing that a Flat mechanical connection occurs between the reinforcing member 100 and the workpiece 25 to be reinforced. The pressure-activatable adhesive layer 40 is preferably placed on the reinforcement element 100 already thermoformed and sufficiently cooled. The following parts, components, components, parts and means of the invention are referenced as follows in the accompanying drawings: Composite material Heart 12 L of corrugated paper 14 L of flat paper 16 Core reserve roll 18 Layer of paper heat-resistant adhesive 20 Kraft paper cover 22 Paper board 3036647 - 15 - 24 Kraft paper cover roll 30 Duroplastic hardening adhesive layer 32 Injection nozzle Pressure-activated adhesive layer 5 50 Decorative layer 60 Marked edge 70 Molding tool 72 Upper mold half 74 Lower mold half 10 76 Cavity 78 Marking edges 80 Rolling station 90 Cutting station 92 Cutting tool 15 100 Reinforcement element Of course, the invention is not not limited to the embodiments described and shown in the accompanying drawings. Modifications are possible, especially from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing as much from the field of protection of the invention.
    权利要求:
    Claims (17)
    [0001]
    REVENDICATIONS1. Composite material (1) for manufacturing a reinforcing element (100) by thermoforming for lightweight construction, having the following attributes: a. a cellulose core (10) from a corrugated paper web (12), b. a Kraft cover paper (20) mechanically connected to the corrugated paper web (12), which comprises a flat paper web (14, 22), characterized by c. a heat-activatable, duroplastically curing adhesive layer (30) disposed between the flat paper web (22) of the Kraft paper cover (20) and the core (10), which is provided, in the activated state , for mechanically connecting the flat paper web (22) of the Kraft paper cover (20) to the core (10).
    [0002]
    Reinforcing element (100) for lightweight construction, having the following attributes: a. a cellulose core (10) from a corrugated paper web (12), b. a Kraft cover paper (20) mechanically connected to the corrugated paper web (12), which comprises a flat paper web (14, 22), characterized in that c. the flat paper web (14, 22) of the Kraft cover paper (20) is mechanically connected to the core (10) by means of, for example, a thermoset duroplastic adhesive layer (30).
    [0003]
    3. Composite material (1) according to claim 1 or reinforcing element (100) according to claim 2, characterized in that the core (10) comprises at least one corrugated paper web and a flat paper web (12, 14) which are glued together in corrugated cardboard.
    [0004]
    Composite material (1) or reinforcing member (100) according to claim 3, characterized in that the paper webs (12, 14) of the corrugated cardboard are connected by means of hardened thermoplastic adhesive layers.
    [0005]
    Composite material (1) according to claim 1 or reinforcement element (100) according to claim 2, characterized in that the flat paper web (22) of the Kraft paper covering (20) is reinforced by fibers.
    [0006]
    A composite material (1) according to claim 1 or a reinforcing member (100) according to claim 2, characterized in that the flat paper web (22) of the Kraft paper covering (20) comprises an elevating filling material the surface density of the paper web (22).
    [0007]
    7. composite material (1) according to claim 1 or reinforcing element (100) according to claim 2, characterized in that the core (10) is reinforced by fibers. 10
    [0008]
    The composite material (1) according to claim 1 or the reinforcing member (100) according to claim 2, characterized in that the Kraft cover paper (20) comprises a thermoplastic cover layer.
    [0009]
    The composite material (1) according to claim 1 or the reinforcing member (100) according to claim 2, characterized in that the composite material (1) the reinforcing member (100) comprises two Kraft cover papers (20). ) which, in turn, comprise a flat paper web (22), in which the core (10) is disposed between the paper webs (22) of the Kraft paperboard (20) and is connectable to / connected to these by means respectively of a hardened / thermosetting duroplastic adhesive layer (30).
    [0010]
    The reinforcing element (100) according to claim 2, characterized in that it has a pressure-activated adhesive layer (40) disposed on one side of the reinforcing member (100) diverted from the cover paper Kraft (20) presents.
    [0011]
    11. Use of a reinforcing element (100) according to claim 2 in the construction of bodies for reinforcing and / or damping vibrations of flat parts.
    [0012]
    A method of manufacturing a reinforcing member (100) for lightweight construction, having the following process steps: a. providing a composite material (1) comprising the following components: i. a cellulose core (10) from a corrugated paper web (12), ii. a Kraft cover paper (20) mechanically connected to the corrugated paper web (12), which comprises a flat paper web (22), 3036647 - 18 - iii. a hardened thermosetting and duroplastic adhesive layer (30) disposed between the core (10) and the paper web (22) of the Kraft cover paper (20), b. introducing the composite material (1) into the cavity of a heated molding tool (70), c. thermoforming the composite material (1) by thermosetting the adhesive layer (30) such that the adhesive layer (10) connects the core (10) and the Kraft cover paper (20) mechanically with each other. 10
    [0013]
    13. The method of claim 12, characterized in that in a further process step, a cutting of the thermoformed composite material (1) is performed.
    [0014]
    14. The method of claim 13, characterized in that the cutting is performed in the molding tool (70). 15
    [0015]
    Method according to claim 12, characterized in that in a further process step the thermoformed composite material (1) is transported to a cooling station where the thermoformed composite material (1) remains until its temperature has reached dropped to a predetermined set temperature. 20
    [0016]
    16. The method of claim 12, characterized in that the composite material (1) provided corresponds to one or more of claims 3 to 9.
    [0017]
    17. A method according to claim 12, characterized in that in a further method step, the surface of the reinforcing member (100) diverted from the Kraft cover paper (20) is provided with a layer of adhesive ( 40) that can be activated by pressing.
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    FR2890893A1|2007-03-23|MOTOR VEHICLE PART COMPRISING AN ALVEOLAR SOUL AND A SKIN
    FR3079448A1|2019-10-04|METHOD FOR MANUFACTURING A TRIM AND CORRESPONDING CLAD
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    同族专利:
    公开号 | 公开日
    CN205046418U|2016-02-24|
    CN106192602A|2016-12-07|
    DE102015108221A1|2016-12-01|
    US20160347024A1|2016-12-01|
    HK1231531A1|2017-12-22|
    DE202015008932U1|2016-03-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3391056A|1964-05-27|1968-07-02|Hercules Inc|Resin-coated fibrous sheet material and members prepared therefrom|
    US3648959A|1970-04-13|1972-03-14|Crown Zellerbach Corp|Paperboard panel substitute for lumber|
    EP0144318A1|1983-05-27|1985-06-19|The Boeing Company|Lightweight, fire-retardant structural panel|
    FI83348C|1987-03-09|1996-01-09|Metsae Serla Oy|Foerfarande Foer framstaellning av produkter ur lignocellulosamaterial|
    US4853273A|1987-12-21|1989-08-01|Elmatco Products, Incorporated|Drill board and method of making the same|
    US4855354A|1988-01-07|1989-08-08|Borden, Inc.|Aldehyde starch saturant laminating adhesives|
    US4948445A|1988-10-28|1990-08-14|Hees Ronald D|Method and apparatus for making a corrugated fiberboard honeycomb structure|
    US5022943A|1989-08-25|1991-06-11|Eften, Inc.|Method of making thermoformably shaped fibreboard sandwich structures|
    US5134014A|1991-01-28|1992-07-28|Eften, Inc.|Moldable foam composite|
    US5292391A|1991-04-29|1994-03-08|Wyerhaeuser Company|Corrugated paperboard strength enhancing process|
    US5743983A|1992-07-10|1998-04-28|Tri-Wall K.K.|Forming method for interior trim material made of corrugated cardboard|
    US5339577A|1992-12-08|1994-08-23|Snyder Darryl L|Laminated non-combustible board for forming ductwork and headers|
    US6080495A|1997-10-27|2000-06-27|Wright; John|Structural panels with metal faces and corrugated plastic core|
    US6372322B1|1998-05-28|2002-04-16|Pactiv Corporation|Shaped honeycomb structures and method and apparatus for making shaped honeycomb structures|
    BE1015610A3|2003-07-17|2005-06-07|Corrutech Nv|Improved glue and method for manufacturing same.|
    US7507461B2|2004-09-01|2009-03-24|Hexcel Corporation|Edge coating for honeycomb used in panels with composite face sheets|
    US9598861B2|2005-02-18|2017-03-21|George Kalogridis Davis|Fire-resistant ultra-lightweight panel with three-dimensional surface design|
    AU2008338415A1|2007-12-17|2009-06-25|Cornell University|High-strength, environmentally friendly corrugated boards|
    FR2929549B1|2008-04-08|2012-04-20|Monnier Marc Le|METHOD FOR MANUFACTURING ALVEOLAR STRUCTURE, CORRESPONDING ALVEOLAR STRUCTURE AND INSTALLATION|
    DE102008051436A1|2008-10-15|2010-04-22|Herbert Gundelsheimer|Planar component i.e. supporting component, for mobile home- and caravan industries, has core made of paper honeycomb and enclosed by cover layers, where paper honeycomb and connection of paper honeycomb are coated with cover layers|
    US20110281063A1|2009-11-20|2011-11-17|E. I. Du Pont De Nemours And Company|Honeycomb core based on carbon fiber paper and articles made from same|
    US20120040144A1|2010-08-11|2012-02-16|Dejong Shawn|Corrugating Adhesive and Use Thereof|
    NZ588967A|2010-11-02|2013-05-31|Corcel Ip Ltd|A protective shroud made from a sheet of closed cell board with at least one u-shaped channel|
    GB2498206A|2012-01-06|2013-07-10|Gmc Marketing Ltd|Making a corrugated board with adhesive and release layers|
    US10369772B2|2012-07-10|2019-08-06|Textron Innovations Inc.|Method of making core-stiffened structure|
    US20140127475A1|2012-08-22|2014-05-08|Daniel James Bonebrake|Paper corrugated sheet|
    WO2015125023A1|2014-02-10|2015-08-27|Nwp Inc.|Thermoformable panel for shelves|
    US9573338B2|2014-02-27|2017-02-21|B/E Aerospace, Inc.|Composite sandwich panel with differential resin layers|
    CN104228157B|2014-09-22|2016-03-23|烟台柳鑫新材料科技有限公司|A kind of boring backing plate of PCB and manufacture method thereof|
    DE202015008932U1|2015-05-26|2016-03-09|Carcoustics Techconsult Gmbh|Composite material for producing a stiffening element for lightweight construction and stiffening element for lightweight construction|DE202015008932U1|2015-05-26|2016-03-09|Carcoustics Techconsult Gmbh|Composite material for producing a stiffening element for lightweight construction and stiffening element for lightweight construction|
    CN107175846A|2017-06-09|2017-09-19|福建利树股份有限公司|A kind of Low-gram-weight reinforced lightweight corrugated carton production technology|
    USD858286S1|2017-07-14|2019-09-03|Koch Knight, Llc|Structured packaging material|
    CN109228541B|2018-10-12|2021-02-23|佛山合信包装有限公司|Production method of environment-friendly corrugated board|
    CN112590938A|2020-12-28|2021-04-02|湖南大学|Automobile upper longitudinal beam made of layered filling material and using method and manufacturing method thereof|
    CN113352810A|2021-05-08|2021-09-07|王硕|Roll paper applied to three-dimensional paper art, roll paper assembly model and model assembly method|
    CN113682382A|2021-09-08|2021-11-23|北京科技大学|Lightweight composite automobile body plate for automobile impact buffering and energy absorption|
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    优先权:
    申请号 | 申请日 | 专利标题
    DE102015108221.7A|DE102015108221A1|2015-05-26|2015-05-26|Composite material for producing a stiffening element for lightweight construction, method for producing a stiffening element for lightweight construction and stiffening element for lightweight construction|
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