Title of Invention

A METHOD FOR FASTENING A MOUNTING ELEMENT TO A WOODEN PRODUCED THEREOF

Abstract

The invention relates to a method for fixing a mounting to a derived timber product. According to said method, the contact area of the mounting is at least partially provided with an adhesive; the contact area of the mounting is then brought into contact with the derived timber product; the adhesive is inductively warmed and activated by means of magnetic induction; and an adhesive connection is created by the hardening adhesive, between the mounting and the derived timber product. The invention also relates to a component produced according to said method.

Full Text

RO/sv 050344WO Component Comprising a Derived Timber Product, Mounting Stuck Thereon, and Method for Producing Said Component The invention relates to a component consisting of a derived timber product and a mounting stuck thereon. Likewise, the invention relates to a method for sticking a mounting on a derived timber product. In line with the description of the invention, the term derived timber product is understood to mean that the element consists of natural wood and of individual elements of natural wood, respectively, or of a material manufactured from wood. Elements, which are manufactured from individual elements consisting of wood, can be core boards, for example. Materials, which are manufactured from wood, can be medium density fiberboards (MDF), high density fiberboards (HDF), hardboards, chipboards or oriented strand boards (OSB) as well. It is known from the state of the art to provide components, which encompass derived timber products, with metal mountings, such as handle bars or hinges. This is particularly known with pieces of furniture or doors as well. As a general rule, mechanical fixing means are used for this purpose. In particular, the mountings are fixed to the surface of the derived timber product by means of screws. However, there are also components, which do not consist of a massive layer of a derived timber product, but which only encompass a derived timber product layer comprising a small thickness, which complicate the screwing process or which - 2 - render it impossible. In these cases, the mountings must be fixed in a different manner, in particular adhesively bonded with the component. However, an adhesive bonding represents an extensive method step, in particular the application and hardening of the adhesive as well as the positioning of the mounting relative to the derived timber product represent extensive method steps. In particular, due to the heat energy required for the processing, the application of adhesives, which can be activated by means of heat energy, represents a problem, because each derived timber product changes its color, chars or is otherwise changed in response to being heated too much. The invention is thus based on the technical problem of improving a method and a component of the afore-mentioned type so that the bonding with an adhesive, which is to be thermally activated, is simplified and, at the same time, the quality of the adhesive connection can be improved. The afore-presented technical problem is solved by means of a method for adhesively bonding a mounting with a derived timber product according to claim 1, where the contact area of the mounting is at least partially provided with an adhesive, where the contact area of the mounting is brought into contact with the derived timber product, where heat energy is created in the mounting or in the adhesive prior to or after being brought into contact by means of magnetic induction, where the adhesive is heated and activated by means of the heat energy, and where an adhesive connection is created between the mounting and the derived timber product by means of the hardening adhesive. - 3 - In particular, the method is advantageous in that the mounting is provided with the adhesive in a first step, if applicable also chronologically long before being adhesively bonded with the derived timber product. In a cooled-down state and without additional heating, the adhesive does not have any or only a slight adhesive effect. The adhesive is to develop the adhesive force only when the contact area comprising the adhesive is brought or has been brought into contact with the surface of the derived timber product. This thus results in the advantage of the method, in particular in industrial use, because the mountings can be provided with the adhesive by the manufacturer, so that the mountings must then only be heated locally in response to being processed with the derived timber product.In this respect it is particularly advantageous that only the mounting or only the adhesive itself is heated by means of the induction and that a heating of the derived timber product occurs only to a limited extent. For this purpose, the mounting or the adhesive is heated by means of a magnetic induction source, either prior to or after being brought into contact. The advantage of the magnetic induction lies in that only the electrically conductive portion of the mounting or of the adhesive itself heats up, without having to create a thermal radiation. Only the mounting or the adhesive and not the derived timber product are thus heated in the first step by means of the magnetic induction. The adhesive is thus activated and unfolds its adhesive force. Heat is transferred to the derived timber product via the contact with the adhesive and, to a small extent, also by means of thermal radiation, originating from the mounting - 4 - or originating from the adhesive. However, temperature limits are not exceeded thereby so that a discoloration, burning or charring of the derived timber product can occur. The cool-down of the adhesive, in turn, occurs after the brief heating so rapidly that the entire heat transferred to the derived timber product has no negative effects on the derived timber product. The inductive heating of an electrically conductive body by means of magnetic induction can be carried out by means of a device, which, by means of a coil being fed with an alternating current, creates an alternating magnetic field, which induces an alternating current in an electrically conductive element. Due to the electric resistance, this current induced, in the element causes a heating of the element at the locations of the current flow. The heat created in such a manner develops immediately and directly in the element itself and in is interior, respectively, that is, it must not be guided to that location by means of thermal conduction. Non-conductive materials, that is, in particular derived timber products of the afore-mentioned type, are not heated by means of induction. Furthermore, materials having a good conductivity, such as aluminum or copper, can barely be heated due the low electric resistance. Metals, which are suitable for an induction heating thus have a high electric resistance. A device which is suitable for carrying out the method, is disclosed in DE 203 00 624 Ul. This is a hand-held unit, with which inductive heating can be carried out. It goes without saying that the invention is not limited to the use of hand-held units. In the industrial application, for - 5 - example in the industrial manufacture of furniture, stationary devices can be used as well. In a particularly preferred manner, the mounting consists of a material which can be heated by means of a magnetic induction, and is heated by means of the magnetic induction. The heat, which develops in the mounting, is then transferred to the adhesive. Preferably, the mounting consists of a metal, but an electrically conductive plastic material or a plastic material containing electrically conductive particles can be used as well. Likewise, it is possible that the adhesive is electrically conductive and is heated by means of magnetic induction. In this case, the heat energy is created directly in the adhesive itself, that is, precisely at the location where the heat energy is required for the activation and the hardening of the adhesive. It is furthermore possible that the inherently electrically non-conductive adhesive includes electrically conductive particles, which are heated by means of magnetic induction. For example, the adhesive can contain metal particles or metal chips, which are heated by means of magnetic induction and which then emit the heat energy to the adhesive. In this case, the heat thus develops precisely at the location, where it is required for the activation and the hardening of the adhesive. There are different possibilities for the design of the adhesive. The demands on the adhesive lie in that the adhesive is transferred into an active state by the supply of heat energy, so as to subsequently, after the cool-down, transition into the adhesive state and thus into the state, which connects the mounting and the derived timber product. - 6 - Preferably, the adhesive consists of a reaction adhesi ve and is at least partially pre-cross-linked prior to the installation of the mounting on the derived timber product. After the heating, the adhesive is then finally hardened. Reaction adhesives are classified into polymerization adhesives, polyaddition adhesives and polycondensation adhesives. The reaction adhesives are thus differentiated according to the types of the chemical reaction. All of them have in common that among them there are reaction adhesives which do not react at all or which react only to a certain extent at room temperature and which are heated only after the supply of heat energy to the extent that the chemical reaction occurs. These reaction adhesives are also referred to as warm-hardening or hot-hardening adhesives. Reaction adhesives which only require a relatively small temperature increase for stimulating the chemical reaction, are thereby preferred. Warm-hardening reaction adhesives are thus particularly preferred. In a further embodiment of the method, the adhesive consists of a thermoplastic adhesive and is at least partially hardened prior to the installation of the mounting on the derived timber product. The adhesive is then at least partially activated, in particular liquefied, by means of the heating so that a solid connection with the surface of the derived timber product is created and the adhesive effect occurs after the cool-down of the adhesive. In a further preferred embodiment of the method, an adhesive consisting of a combined adhesive system is used. One portion of the adhesive system consists of a thermoplastic adhesive and the other portion consists of a - 7 - reactive adhesive. Such adhesive systems are also known as reactive hot melt (RHM) adhesives. Furthermore, prior to the installation of the mounting, the surface of the derived timber product can be pretreated by means of roughening, grinding, smoothing and/or another method and/or a primer or other products can be applied for pretreatment of the surface. In particular, possible coatings of the derived timber product in the region which is to be adhesively bonded can be pretreated as mentioned above and/or partially or completely removed. The afore-described technical problem is solved by means of a component comprising the features of claim 7 as well. Further preferred embodiments of the component are described in the dependent claims. The component as claimed in the invention encompasses at least one derived timber product and at least one mounting connected with the derived timber product. An adhesive layer is provided between the derived timber product and the mounting, wherein the adhesive connects the mounting with the derived timber product. According to the invention, the mounting or the adhesive layer is at least partially electrically conductive. A mounting is thereby understood to be every element, which can be connected with the derived timber product. For example, the mounting can be a hinge, a handle bar, a catch, an eyelet, a lock, an end piece, preferably a table leg or an accessory, which does not have a certain technical function. - 8 - Preferably, the mounting consists at least partially of an electrically conductive material. The mounting itself can thus be heated by means of the magnetic induction. Metals are preferable as electrically conductive materials. Likewise, however, plastic materials, which are either electrically conductive themselves or which encompass a plurality of electrically conductive particles, can be used as well. Furthermore, the adhesive layer can at least partially consist of an electrically conductive material. On the one hand, the conductivity of the adhesive layer can be created by an electrically conductive adhesive. On the other hand, the conductivity of the adhesive layer can be created by a plurality of electrically conductive particles within the adhesive. In a particularly advantageous manner, the invention can be used for components, which are designed as lightweight building board with or without a frame construction, wherein the derived timber product encompasses at least an outer cover plate. In such a set-up, the component is not designed to be massive enough for a reliable connection of the mounting with the derived timber product to be established by means of mechanical means, such as screws. This is so because the component does not include sufficient solid material for the screws to be able to provide a fixed connection. Furthermore, it is preferred for the derived timber product to encompass an untreated surface. A good and reliable adhesive bonding with the surface can thus be ensured. In a further embodiment of the invention, the surface of the derived timber product encompasses a coating, in particular a lacquer layer, a laminate layer, a melamine - 9 - resin layer, a veneer layer, preferably oiled or waxed, or a film coating. In this case, the mounting is adhesively bonded with the coating. An important condition for a permanent fixing of the mounting is then that the coating encompasses a sufficient adhesive power so as to be able to transfer the forces or stresses, which are to be transferred, to the derived timber product. As an alternative, prior to the installation of the mounting, the above-mentioned coatings can also be pretreated by means of roughening, grinding, smoothing and/or another method and/or a primer or other products can be applied for pretreatment. In particular, the coatings can be partially or completely removed in the region which is to be adhesively bonded. It goes without saying that all of the afore-mentioned pretreatments can also be carried out individually or in combination at the derived timber product itself. The afore-described component and a typical procedure will be described in more detail below by means of an exemplary embodiment as well as a further exemplary embodiment, wherein reference is made to the attached drawing. In the drawing Fig. 1 shows a derived timber product in lightweight construction comprising a mounting spaced apart therefrom, Fig. 2 shows the derived timber product in contact with the mounting, wherein electromagnetic radiation acts on the mounting for the purpose of inductive heating, - 10 - Fig. 3 shows the derived timber product comprising the mounting stuck thereon, wherein the mounting is screwed together with a further element and Fig. 4 shows an alternative embodiment of a derived timber product comprising the mounting stuck thereon, wherein the mounting is adhesively bonded with a further element as claimed in the invention as well. Different stages of the procedure for producing a component as claimed in the invention are explained in more detail in Figs. 1 to 3 by means of a preferred exemplary embodiment. Component 2 encompasses a derived timber product 4, which, in the instant case, is designed as a lightweight component. For this purpose, provision is made for a core layer 6, which is covered on both sides with a derived timber board 8 and 10. The core layer thereby consists of a honeycomb-shaped structure made of cardboard or aluminum, for example. The derived timber boards 8 and 10 are thereby so thin that a mounting 12, which in the instant case is designed as a hinge, cannot be screwed to a derived timber board 8 and 10. The mounting 12 is thus adhesively bonded with the surface of the upper derived timber product 8, wherein a magnetic induction as claimed in the invention is used for heating the mounting 12 during the adhesive bonding. For this purpose, the mounting 12 consists of an electrically conductive material, for example a metal. As is illustrated in Fig. 1, the derived timber product 4 and the mounting 12 are initially arranged so as to be spaced apart from one another. A layer 16 consisting of an - 11 - adhesive, which is inherently stable and which has only a small or no adhesive effect, is arranged on the contact area 14 of the mounting 12, which is oriented downwards. As is indicated with the arrow in Fig. 1, the mounting 12 is brought into contact with the surface of the derived timber product 4. As is shown in Fig. 2, the mounting 12 is subsequently exposed to electromagnetic radiation, which leads to an inductive heating of the mounting 12, at least in the region of the contact area 14. This locally developing heat activates the adhesive, so that it can again unfold its adhesive force. The electromagnetic radiation is illustrated in Fig. 2 by means of wavy lines and by means of a wide arrowhead. A device for creating the electromagnetic radiation is not illustrated in Fig. 2, because the instant invention does not rely to the type of device. Hand-held units or stationary devices can be used. In other words, the method according to the invention can be applied in industrial and automated scale as well as in an individual production. Fig. 3 then shows the component in its finally hardened condition, in which the derived timber product 4 is fixedly adhesively bonded with the mounting 12. Furthermore, Fig. 3 shows that, at a different location, the mounting 12 is connected via a common screw connection with another element 18 by means of a screw 20. Fig. 4 shows an alternative exemplary embodiment of the derived timber product 4 comprising an adhesively bonded mounting 12. The derived timber board 8 and the core layer 6 are recessed in a region, which is adapted to the - 12 - circumference of the mounting 12. The mounting 12 is adhesively bonded with the derived timber board 10 and 8 by means of layers 16. This process was carried out according to the afore-described method. The outer surface of the mounting 12 can be arranged in a plane of the outer surface of the derived timber board 8, in particular by means of adapting the thickness of the mounting 12. Furthermore, it goes without saying that it is possible to adhesively bond the second portion of the mounting 12 with a further element, for example a door 18, also by means of a layer 16. In turn, the afore-described method as claimed in the invention can thereby be used for the adhesive bonding. Beforehand, the method was illustrated in such a manner that the mounting 12 was initially brought into contact with the derived timber product 4 and that the mounting 12 was only subsequently exposed to the electromagnetic radiation. This procedure has the advantage that the inductive heating of the mounting 12 and thus of the adhesive only occurs, when there is already a contact with the derived timber product 4. The positioning of the mounting 12 on the surface of the derived timber product 4 is thus facilitated, because no or only a slight adhesive force is available and a one-time contact with the surface can be dissolved or a displacement of the mounting 12 on the surface of the derived timber product 4 remains possible. However, it is also possible to initially inductively heat the mounting 12, before it is brought into contact with the derived timber product 4. In this case, the adhesive comes - 13 - into contact with the surface of the derived timber product 4 only when it has already been at least partially activated. . RO/kj- 050344WO September 15, 2006 1. A method for fixing a mounting to a derived timber product, where the contact area of the mounting is at least partially provided with an adhesive, where the contact area of the mounting is brought into contact with the derived timber product, where heat energy is created in the mounting or in the adhesive prior to or after being brought into contact by means of magnetic induction, where the adhesive is heated and activated by means of the heat energy, and where an adhesive connection is created between the mounting and the derived timber product by means of the hardening adhesive. 2. The method according to claim 1, where the mounting consists of an electrically conductive material and is heated by means of the magnetic induction and where the heat, which develops in the mounting, is transferred to the adhesive. 3. The method according to claim 1, where the adhesive is electrically conductive and is heated by means of magnetic induction. 4. The method according to claim 1, where the adhesive includes electrically conductive particles, which are heated by means of magnetic induction. - 15- 5. The method according to claim 1, where the adhesive consists of a reaction adhesive and is at least partially pre-cross-linked prior to the installation of the mounting on the derived timber product and where the adhesive is finally hardened after the heating. 6. The method according to claim 1, where the adhesive consists of a thermoplastic adhesive and is at least partially hardened prior to the installation of the mounting on the derived timber product where the adhesive is at least partially liquefied by means of the heating. 7. The method according to one of claims 1 to 6, where the surface of the derived timber product, at least in the region which is to be adhesively bonded, is pretreated by means of roughening, grinding, smoothing and/or another method and/or a primer or another product is applied for pretreatment of the surface. 8. A component, comprising at least one derived timber product (4), comprising at least one mounting (12) connected with the derived timber product (4), and comprising an adhesive layer (16), wherein the adhesive layer (16) is provided between the derived timber product (4) and the mounting (12) and wherein the mounting (12) is connected with the derived timber product (4) by means of the adhesive (16), characterized in - 16— that the adhesive layer (16) is at least partially 1 electrically conductive. 9. The component according to claim 8, characterized in that the mounting (12) at least partially consists of an electrically conductive material. 10. The component according to claim 8, characterized in that the adhesive layer (16) at least partially consists of an electrically conductive material. 11. The component according to claim 8, characterized in that the adhesive is electrically conductive. 12. The component according to claim 8, characterized in that the adhesive layer (16) encompasses a plurality of electrically conductive particles. 13. The component according to one of claims 8 to 12, characterized in that the adhesive consists of a reaction adhesive or of a thermoplastic adhesive. 14. The component according to one of claims 8 to 13, characterized in that the derived timber product (4) is designed as a lightweight building board and in that provision is made for at least one outer cover plate (8, 10). -17- 15. The component according to claim 14, characterized in that in each case one cover plate (8, 10) encompasses a recess and that the mounting (12) is partially arranged in the recess and is adhesively bonded therein. 16. The Component according to one of claims 8 to 15, characterized in that the derived timber product (4) is provided with a coating. 17. The component according to claim 16, characterized in that the coating in the region, which is to be adhesively bonded, is pretreated by means of roughening, grinding, smoothing and/or another method and/or a primer or another product is applied for pretreatment of the surface. 18. The component according to claim 16*or 17, characterized in that the coating is partially removed in the region, which is to be adhesively bonded. 19. The component according to one of claims 16 to 18, characterized in that the mounting (12) is adhesively bonded with the coating. 20. The component according to claim 16, characterized in that the coating is completely removed in the region, which is to be adhesively bonded. - 18 - 21. A mounting for being connected with a derived timber product, comprising an adhesive layer, which, is applied by the manufacturer, wherein the mounting or the adhesive layer encompass at least electrically conductive particles, wherein the mounting or the adhesive layer can be heated by means Of induction, and Wherein the adhesive layer can be activated by means of heating with regard to the unfolding o£ an adhesive force. 22. The mounting according to claim 21, characterized in that the adhesive consists of a reaction adhesive. The invention relates to a method for fixing a mounting to a derived timber product. According to said method, the contact area of the mounting is at least partially provided with an adhesive; the contact area of the mounting is then brought into contact with the derived timber product; the adhesive is inductively warmed and activated by means of magnetic induction; and an adhesive connection is created by the hardening adhesive, between the mounting and the derived timber product. The invention also relates to a component produced according to said method.

Documents:

03499-kolnp-2007-abstract.pdf

03499-kolnp-2007-claims.pdf

03499-kolnp-2007-correspondence others.pdf

03499-kolnp-2007-description complete.pdf

03499-kolnp-2007-drawings.pdf

03499-kolnp-2007-form 1.pdf

03499-kolnp-2007-form 2.pdf

03499-kolnp-2007-form 3.pdf

03499-kolnp-2007-form 5.pdf

03499-kolnp-2007-international publication.pdf

03499-kolnp-2007-international search report.pdf

03499-kolnp-2007-pct request form.pdf

03499-kolnp-2007-priority document.pdf

03499-kolnp-2007-translated copy of priority document.pdf

3499-KOLNP-2007-ABSTRACT.pdf

3499-KOLNP-2007-AMANDED CLAIMS.pdf

3499-KOLNP-2007-CORRESPONDENCE 1.1.pdf

3499-KOLNP-2007-CORRESPONDENCE OTHERS 1.1.pdf

3499-KOLNP-2007-CORRESPONDENCE OTHERS-1.1.pdf

3499-KOLNP-2007-CORRESPONDENCE-1.2.pdf

3499-KOLNP-2007-CORRESPONDENCE.1.2.pdf

3499-KOLNP-2007-DESCRIPTION (COMPLETE).pdf

3499-KOLNP-2007-DRAWINGS.pdf

3499-KOLNP-2007-ENGLISH TRANSLATION.pdf

3499-KOLNP-2007-EXAMINATION REPORT.1.2.pdf

3499-KOLNP-2007-FORM 1.pdf

3499-KOLNP-2007-FORM 18.1.2.pdf

3499-kolnp-2007-form 18.pdf

3499-KOLNP-2007-FORM 2.pdf

3499-KOLNP-2007-FORM 26.1.2.pdf

3499-KOLNP-2007-FORM 3 1.1.pdf

3499-KOLNP-2007-FORM 3.1.2.pdf

3499-KOLNP-2007-FORM 5.1.2.pdf

3499-KOLNP-2007-GRANTED-ABSTRACT.pdf

3499-KOLNP-2007-GRANTED-CLAIMS.pdf

3499-KOLNP-2007-GRANTED-DESCRIPTION (COMPLETE).pdf

3499-KOLNP-2007-GRANTED-DRAWINGS.pdf

3499-KOLNP-2007-GRANTED-FORM 1.pdf

3499-KOLNP-2007-GRANTED-SPECIFICATION.pdf

3499-KOLNP-2007-OTHERS-1.1.pdf

3499-KOLNP-2007-OTHERS.pdf

3499-KOLNP-2007-PA.pdf

3499-KOLNP-2007-PETITION UNDER RULE 137.pdf

3499-KOLNP-2007-REPLY TO EXAMINATION REPORT.pdf

3499-KOLNP-2007-TRANSLATED COPY OF PRIORITY DOCUMENT.1.2.pdf

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