EP2299029A1 - Shuttering element with edge protection and method for its manufacture - Google Patents

Abstract

The element (1) has a protection edge section (10) arranged at a partial area (9) of an edge surface (8) of a base body (3) that is made of wood or wood-based material. Another protection edge section (12) is attached to another partial area (11) of the edge surface and/or to an exterior surface of the former edge section. The latter edge section is attached to a contact area at the former edge section. The protection edge sections are made of plastic materials by injection molding. The plastic materials consist of permanent elastic plastic i.e. thermoplastic polyurethane. The base body is made of wood plastic composite slab, wood plastic mixture plate, thermoplastic or duroplastic coating plate and wood-based material such as wooden plate, three-layer plate, glue wooden plate, plywood, oriented stranded board plate, chip board and hard fiber board. An independent claim is also included for a method for producing a shuttering element with protection edge.

Description

The invention relates to a formwork element, in particular a formwork panel according to the preamble of patent claim 1 and a method for producing a formwork element according to the preamble of patent claim 10.

In order to extend the service life of formwork panels or general formwork elements made of wood and / or wood materials, these are provided for some time with an edge protection made of plastic, which essentially serves to damage the edges of the formwork elements by a higher mechanical wear resistance of the edge protection made of plastic To reduce the body of wood and / or wood-based material and on the other hand, to prevent the penetration of moisture in the body of wood and / or wood-based material over the edge regions largely. The edge portions of such formwork elements are exposed to high mechanical loads, in particular during construction or dismantling after formwork, especially at the edges, and thereby occurring damage to the edges adversely affect the quality of the concrete structures produced with the formwork elements, as characterized at joints between two formwork elements When edge damage protrusions or protrusions are caused on the finished component surface, which must be laboriously removed after disassembly of the formwork and therefore costly. The freedom from damage to edges is therefore an important criterion for the service life of such formwork elements.

The edge protection made of plastic should also prevent moisture from penetrating over the edge surfaces of a formwork element, since the absorption or release of moisture can cause swelling or shrinkage of the body made of wood and / or wood material, since this is also on the surface quality of a so produced concrete component may adversely affect and beyond the mechanical strength of the formwork element due to degradation processes of the natural material wood, especially decay processes can be greatly accelerated, whereby the service life of a formwork element is also adversely shortened.

For the execution of such edge protection on a formwork element is approximately off DE 2 305 797 A1 known to be attached to marginal narrow surfaces of a formwork panel made of wood along the edges of the plate edge of plastic. In this case, the edge cover layers have a central web projecting at right angles and engaging in an edge groove of the shuttering panels, and on the surface on which the edge cover layers bear against the wood core of the shuttering panel, the edge cover layers are glued to the wood core. The wood core is provided to protect against moisture on the plate surface at least on one side with a flat cover layer of plastic and to prevent ingress of moisture into the wood core, the at least one cover layer in the region of their abutting surfaces at their outer edges with the adjoining edge layers glued or welded.

Out DE 196 11 413 C2 a method for attaching an edge protection on a formwork panel is known in which a base plate made of wood a wood composite or a wood-like material after cutting at least partially along the edge surfaces and in particular in corner areas with a plastic, preferably polyurethane. One embodiment of the edge protector described as being advantageous is to form it from a homogeneous material around the entire plate and without interruption or additional reinforcements at the corners, but such a formation of a homogeneously circumferential edge protection in formwork panels of different formats requires expensive devices.

WO 2008/095897 A 1 also discloses the production of an edge protector or a sealing edge using an injection molding process, in which edge protection is applied to frontal edge surfaces of a wooden body coated with watertight cover surfaces. In order to achieve a firm, mechanical anchoring between the edge protector and the main body as well as a watertight connection between the edge protector and the top surface, elaborate machining processes are required on the main body.

The object of the invention is to provide a formwork element with an edge protector and a method for its production, in which, despite the use of economic production methods, a high mechanical strength of the edge protector and a good protection against ingress of moisture is achieved in the formwork element.

The object of the invention is achieved by a formwork element with the features of the characterizing part of patent claim 1 and by a method with the characterizing measures of claim 11. Characterized in that on at least a second partial surface of the edge surface of the base body and / or on an outer surface of the first guard edge portion, a second guard edge portion of a second plastic material is arranged by means of an injection molding and the second guard edge portion at a contact surface to the first guard edge portion permanently mechanically strong and watertight connects Advantageous manufacturing processes can be selected for the respective protective edge sections, and properties of the protective edge adapted to the respective occurring stresses can be achieved by the choice of the plastic material, wherein the joints have no weak points with respect to due to the permanent connection at the contact surfaces between the first and second protective edge sections form mechanical resilience and moisture protection. Characterized in that the production of the edge protection of plastic material can be optimally selected in the individual protective edge portions, such an embodiment or such a manufacturing method is particularly well suited to provide formwork elements with complex edge surfaces in an economical manner with an edge protection with high protection. In particular, the entire edge surface of a shuttering element can thereby be provided with an edge protection without pronounced weak points with respect to the protective effect on the contact surfaces. On the structure of the body made of wood and / or wood-based material is not discussed in detail in this case, since from the prior art sufficiently suitable embodiments and manufacturing methods are known, at which point as examples of advantageous embodiments of a base body of the use of solid wood panels, Three-layer boards, laminated wood panels, plywood, OSB boards, chipboard, hardboard, MDF boards, wood-plastic composite panels, panels made of wood-plastic mixtures, plates made of all the above materials with thermoplastic or thermosetting coatings, etc. may be mentioned.

The embodiment according to the invention can be advantageously used in particular in the case of three-layer plates, since at least parts of the basic body transversely to the wood fiber are present in each part of the edge surface are cut and these so-called end-grain wood surfaces must be protected due to their high water absorbency especially against moisture.

A high binding ability between edge protection and body and a high mechanical strength of the edge protection in use is achieved when the plastic of the first guard edge portion and the plastic of the second guard edge portion consists essentially of elastic plastic, in particular thermoplastic polyurethane (TPU). The two plastic materials do not have to be identical, but should form a good adhesion bond to one another at the contact surface, the mechanically permanent connection being effected inter alia by VANderWAALS forces and interdiffusion between the macromolecules of the first plastic material and the macromolecules of the second plastic material. In addition, between the plastic material of the first guard edge portion and the plastic material of the second guard edge portion on the contact surface, a mechanical anchoring, for example, by undercuts or openings in the first guard edge portion can be effected, which can be effective in addition to the Haftungsverbund. To further improve the connection between the first protective edge section and the second protective edge section, it is possible to improve by pre-treatment of the contact surface on the first protective edge section by means of adhesion promoters or primers. In particular, the use of similar plastic material for the first guard edge portion and the second guard edge portion guarantees a good and durable connection.

An embodiment of the formwork element which can be produced particularly economically is that the second guard edge section extends over a corner of the main body or a corner of the main body covered by the first guard edge section or a region of a rounded or chamfered change in direction of the edge surface of the main body or of the first guard edge section Especially corner areas or transition areas of the edge surface are exposed to high mechanical loads during later use of the formwork element and the second guard edge section can accordingly be designed specifically adapted to these requirements. Furthermore, at rounded or chamfered corners or direction change sections of the main body attachment of a continuous first guard edge portion lighter than at sharp corners of the body.

An advantageous embodiment of the formwork element further consists in that the second guard edge portion along the edge surface at least partially has a constant thickness perpendicular to the edge surface, since in such sections with constant thickness, the edge surface on the base body is a parallel curve to the finished protective edge and thereby the body in a simple manner can be prepared for the attachment of the second guard edge portion. Furthermore, it is achieved that within the second guard edge portion as small as possible changes in the mechanical properties are present, which is desirable on the entire circumference of the formwork element.

The mechanical anchoring of the second guard edge portion on the first guard edge portion and optionally also the base body is promoted in particular by a connecting surface of the second guard edge portion with the first guard edge portion and possibly also the base body corresponds to at least one third of the total circumferential surface of the second guard edge portion. The total circumferential area corresponds to the entire surface of the second guard edge portion considered as a solid body less lying in the plate surfaces of the formwork element faces. The entire surface may also be equated with the inner surface of the mold cavity for molding the second guard edge portion. This reduces the risk of separation due to mechanical stress.

An advantageous embodiment of the formwork element that can also be combined with other design variants is that the end sections of the first guard edge section, which form contact surfaces or abutment surfaces or end faces, which are adjoined later by a second guard edge section, are arranged on rectilinear sections of the edge surface. This end portions are thereby connected in a non-curved state with the edge surface of the body and it is the risk of unwanted separation of the end portions of the edge surface due to internal stresses avoided. This is particularly advantageous if there is a greater time interval between the attachment of the first protective edge section and the second protective edge section. After injection of the second guard edge portion, the risk of undesired detachment is negligible, since the end portions are quasi additionally fixed to the base body by the second guard edge portion.

At a direction change portion of the main body or the first guard edge portion, in particular a corner, the thickness of the second guard edge portion measured along an angular symmetry of two adjoining the direction change portion edge surfaces may preferably be between 5 and 15 times the thickness of the first guard edge portion, whereby specifically the high mechanical stresses exposed corners of the body are optimally protected from damage by the inventive protective edge.

In the region of the contact surface, the thickness of the second guard edge portion may be measured perpendicular to its outer surface between one and three times the thickness of the first guard edge portion, preferably with similar mechanical properties of the plastic material of the first guard edge portion and the plastic material of the second guard edge portion preferably approximately the same Thickness of the two protective edge portions is selected at the contact surface in order to effect in the region of the contact surface as small as possible changes in the mechanical properties of the finished protective edge. On the other hand, with different mechanical properties between the plastic material of the first protective edge section and the plastic material of the second protective edge section, the mechanical properties of the second protective edge section can be adjusted by varying its thickness to that of the first protective edge section or can consciously have different mechanical properties in the second protective edge section than in the first protective edge section be achieved, such as an increased compliance or even a lower compliance under pressure load.

In order to avoid abrupt changes in the mechanical properties within the second protective edge section, it may be advantageous if it has at least sections along the edge surface a variable thickness perpendicular to the edge surface, which on the one hand for the production flowing transitions are achieved by gentle cross-sectional changes, for about the preparation with an injection molding are fluidically favorable. Since in the use of formwork elements they are often pulled over an edge, it is advantageous if the protective edge of a formwork element has the least possible mechanical discontinuities, ie in particular as uniform as possible compliance or elasticity, since a protective edge with it leaps and bounds changing compliance when pulling over an edge may be exposed to the protective edge in the region of this mechanical discontinuity of an extremely high load, which could cause a tearing of the protective edge. Therefore, it is advantageous if the first protective edge portion and the second protective edge portion in the region of the contact surface at load perpendicular to the edge surface of the body or to the surface of the protective edge have at least approximately equal stiffness, wherein the stiffness as the ratio of the modulus of elasticity of the respective plastic material Thickness of the respective plastic material is defined perpendicular to the edge surface.

A particularly economical production of a formwork element according to the invention is possible if the first guard edge portion and / or the second guard edge portion is connected over the entire surface and blunt with the edge surface of the body, since in this case the preformatting of the body with very simple tools such as a saw blade or a cylindrical Milling cutter or a chipper can be done. In particular, two parallel edge surfaces on the base body can be produced using a Doppelendprofilers in a single pass, which can be an additional degree of freedom in the design of the edge surface by transverse to the feed direction in Doppelendprofiler arranged adjustment axes of the milling units. In this embodiment, the edge surface can be dispensed with the introduction of additional grooves by means of complex tools and still be achieved by using high-strength adhesive bonds a mechanically sufficiently strong connection between the first protective edge portion and the base body. As an example of such a high-strength adhesive process may be mentioned at this point the use of PUR-Hot-Melt adhesive systems, which have long been used economically in the field of edge banding with reliable results and mechanically high-strength compounds allow and against environmental influences, especially moisture, have a high resistance.

The blunt preformatting of the edge surface is in the simplest case at right angles to the surface of the plate-like base body, but deviating from the edge surface may be oriented obliquely to the plate surface of the shuttering element.

Alternatively, in particular in the region of the second protective edge section, the edge surface may have at least one recess or a profiling running along the edge surface of the main body, whereby a larger surface area surface area between the second protective edge section, which is applied by means of an injection molding process after the first protective edge sections have been applied. which is available for wetting with the molten plastic material of the second protective edge portion and thereby higher mechanical adhesion to the body can be achieved. Suitable recesses in the body can be formed by slots or holes that can be made with simple tools and possibly even in a continuous process; a profiling on the wall surface of the body can also be easily applied in a continuous process with known from the prior art tools and methods.

When attaching recesses or grooves on the edge surface of the body, however, must be taken into account that they can form the starting point for possible cleavage of the body of wood and / or wood material when attaching the second guard edge portion by means of an injection molding process and the resulting surface pressures and therefore sharp corners as far as possible should be avoided. This risk of splitting of the main body during the injection of the second plastic material is largely avoided in a full-surface or blunt preformatting of the edge surface of the body.

An additional increase in the mechanical strength of the connection between the first protective edge section and the second protective edge section can be achieved if these have positive-locking elements cooperating in the region of the contact surface. For example, at the first protective edge portion, which is formed for example by prefabricated edge material of the first plastic, suitable undercuts are provided on the contact surface during attachment, which are filled during the subsequent attachment of the second protective edge portion by means of an injection molding of the plastic of the second protective edge portion and after solidification the second plastic material is produced a positive mechanical connection between the two protective edge portions. By such undercuts or recesses in addition, the common surface of the contact surface is increased and is thus one larger area for an adhesion effect between the first plastic material and the second plastic material available. Such an undercut or a recess can be made at a first guard edge portion, which is formed from prefabricated roll material, by means of a suitable punch at Kapp-section.

As already mentioned above, it is advantageous if the first protective edge sections and the second protective edge sections have as similar or equivalent physical, in particular mechanical, technological properties and, as a result, the most homogeneous possible protective edge is present over the entire circumference of a shuttering element. This can be achieved if the plastic material of the first protective edge section and the plastic material of the second protective edge section have at least approximately the same technological properties, in particular elasticity, tensile strength, hardness, melting temperature, etc.

Alternatively, however, it may also be advantageous if the plastic material of the first protective edge section and the plastic material of the second protective edge section have noticeably different mechanical-technological properties relative to each other. For example, in the region of corners of the guard edge formed by second guard edge portions and exposed to generally higher mechanical stresses in use, a different plastic material may be used in this embodiment than for the first guard edge portions extending over much of the longitudinal edges Transverse edges of a formwork panel extend.

In order to achieve a balance between high mechanical strength and economical production of a formwork element with protective edge, it is advantageous if the thickness of the first guard edge portion between 0.1 and 0.5 times the thickness of the body corresponds. The basic elements of formwork elements often have a thickness of between 10 mm and 35 mm, with an average thickness of the first protective edge section of 2 mm to 8 mm having proved to be advantageous in practice. In the case of a first protective edge section or second protective edge section of such a thickness, it is ensured that punctiform, impact-like loads on the edge of such a shuttering element are distributed over a larger area by the plastic material of the protective edge and the basic body lying underneath is spread over wood and / or wooden material is exposed to relatively low and therefore damage-free sustainable mechanical loads.

Since formwork elements according to the invention have a very long service life and represent high-quality equipment, it is furthermore advantageously possible to provide a measuring sensor element and / or an RFID transponder element in the region of the protective edge. For example, before attaching the first guard edge portion in a recess of the body, a corresponding element can be installed or even before attachment of the second guard edge portion, since the second guard edge portion is attached by means of an injection molding, it is also possible in particular, such an element in the second Pour in protective edge section. A measuring sensor element in such a formwork element can be used, for example, to measure a temperature in the region of the formwork. An RFID transponder element is suitable, for example, for non-contact and / or automatable identification of individual formwork elements, whereby the use of such formwork elements can be tracked over the service life, or can be used to provide measured values of a measurement sensor element readable without contact.

The inventive method for producing a shuttering element with edge protection according to claim 10 is characterized in that individual sections of the edge protection are each made with those measures that represents an optimal balance between economy of the manufacturing process and optimal performance characteristics, in particular high durability of the edge protection.

The second guard edge portion is attached after the attachment of the first guard edge portion in an injection molding using a the base body and a portion of the first guard edge portion and two adjacent first guard edge portions in the contact surface embracing injection mold. The mold cavity for receiving the molten second plastic material is thus limited on the one hand by mold walls of the injection mold and on the other by an outer surface of the first guard edge portion or the edge surface of the body together with abutting surfaces and outer surfaces of adjacent first guard edge portions. This method is insensitive to geometric variations as a primary molding process Therefore, the upstream sub-steps of the formatting of the body and the attachment of the first guard edge portion can be performed with less high accuracy requirements of the edge surface or the abutment surfaces of adjacent first guard edge sections.

A high-quality, durable, in particular mechanically high-strength and watertight connection at the contact surface is achieved by the connection of the second protective edge section to the first protective edge section being produced at the contact surface by a melting process or a welding process by which an intimate connection between the plastic material of the first Protective edge portion and the plastic material of the second guard edge portion is achieved. Due to the highest possible temperature of the molten plastic material of the second guard edge portion, the plastic material of the first guard edge portion is superficially melted during the injection process and thereby made an intimate connection. A particularly good connection is achieved if the plastic material of the first protective edge section and the plastic material of the second protective edge section are at least similar or largely identical, ie have an equivalent chemical composition.

After the injection molding process has been carried out, the plastic material of the second protective edge section is deprived of heat via the injection mold and the remaining formwork element, whereby the initially molten plastic solidifies and the second protective edge section obtains the desired strength. In order to accelerate the cooling of the second protective edge portion and thereby shorten the time required for removal of the formwork element from the mold, the injection mold may have cooling means such as in the form of liquid-flowed cooling channels.

Since the pre-formatting of the main body takes place most economically in a continuous process, it is advantageous if the first protective edge section or the first protective edge sections are applied in a continuous process to the edge surface of the main body. For this purpose, it is possible to integrate corresponding devices for the attachment of the first protective edge portion in a double end tenoner or even a one-sided edging line on which the formatting of the base body takes place.

However, the plastic material of the first guard edge portion and / or the second guard edge portion may also be applied to a separate processing station independent of the pre-formatting.

The plastic material for the first protective edge portion may advantageously be present as a prefabricated edge material which is applied in the form of preformatted strips or as roll material, this embodiment also being advantageously combined with other described embodiments.

Regardless of the manner of attaching the first guard edge portion and the second guard edge portion, the edge surface may be subjected to a pretreatment prior to attachment, which may include, but is not limited to, the use of primers or similar primers to improve the adhesion of the edge protector.

Furthermore, it is possible for the contact surface on the first protective edge section and / or the edge surface of the main body to be subjected to a machining operation before attaching the second protective edge section. In this case, in particular also in a continuous process, a machining with geometrically determined cutting such as sawing or milling or with geometrically indefinite cutting such as grinding done. By such intermediate formatting of the formwork element prior to attachment of the second guard edge portion, the accuracy requirement of the previous attachment of the first guard edge portion can be kept lower, whereby the economy of the overall process can be reduced. Furthermore, by means of this additional machining between the application of the individual protective edge sections, a second protective edge section as well as the contact surfaces can be given a special geometry and thus, for example, a particularly high flexibility and elasticity or else a high resistance and high rigidity can be imparted. In order to achieve clean cutting edges in this machining after attaching the first guard edge portion, the cutting tools are used in the same process.

A particularly economical production of the formwork elements according to the invention is possible when at continuously extending edge surface portions, in particular longitudinal edges and end edges of a rectangular base body, first protective edge portions in a continuous process are attached and subsequently attached to edge surface portions between or at each other at an angle to each other, the first guard edge portions, the second guard edge portions by means of an injection molding process. As a result, a large part of the peripheral edge protection can be attached with the economically advantageous continuous flow method, whereby this method can be used very flexibly even in the most diverse formats, while the attachment of the second protective edge sections at the corners of the shuttering element by means of suitable injection molds, only in the thickness of the shuttering element be adjustable, regardless of the surface dimensions of the formwork element can be economically mounted and a consistent quality of the connection can be achieved at the contact surfaces.

A particularly advantageous embodiment of a shuttering element or of the method for producing such, which can also be combined with other embodiments, is that in a first production step the first protective edge section, in particular as a semi-finished material, is applied to approximately the entire edge surface of the main body. Approximately in this context means that on the entire circumference of the body as possible only two abutment surfaces or end faces of the first guard edge portion are present, which are preferably positioned in a corner region of the finished formwork element. The main body is preferably provided in the corner regions of the finished formwork element with a rounding or bevel, whereby the edge surface is set back relative to a right angle. This beveling or rounding of the contour of the body facilitates the attachment of the first guard edge portion in one piece, in particular the continuous attachment in a continuous process. The abutment surfaces of the first guard edge portion are advantageously positioned at such a rounding or bevel, wherein the mutually facing abutment surfaces to each other a distance of up to a few centimeters, preferably less than 20 mm. At the straight portions of the edge surface, the outer surface of the first protective edge portion is already the later outer surface of the shuttering element, while in the corner regions, the finished outer surface of the shuttering element is formed by injection molding of the second protective edge regions.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

Fig. 1

ein Schalungselement in Form einer rechteckigen Schaltafel mit umlaufendem Kantenschutz;

Fig. 2

eine mögliche Ausführung eines Eckbereichs des Schalungselements;

Fig. 3

eine weitere mögliche Ausführungsform eines Eckbereichs des Schalungsele- ments mit einem angedeuteten Spritzgießwerkzeug;

Fig. 4

einen Schnitt durch ein Schalungselement gemäß Linie IV-IV in Fig. 1;

Fig. 5

eine weitere mögliche Ausführungsform des Kantenschutzes in einem Eckbereich des Schalungselements;

Fig. 6

eine weitere mögliche Ausführungsform des Kantenschutzes in einem Eckbereich des Schalungselements;

Fig. 7

ein Ablaufschema für das Herstellverfahren eines erfindungsgemäßen Schalungs- elements;

Fig. 8

eine weitere Ausführungsform einen Schalungselements mit Kantenschutz;

Fig. 9

einen Schnitt durch einen Kantenschutz mit einer speziellen Ausführungsform eines ersten Schutzkantenabschnitts.

Each shows in a highly schematically simplified representation:

Fig. 1

a formwork element in the form of a rectangular formwork panel with circumferential edge protection;

Fig. 2

a possible embodiment of a corner region of the formwork element;

Fig. 3

a further possible embodiment of a corner region of the formwork element with an indicated injection mold;

Fig. 4

a section through a formwork element according to line IV-IV in Fig. 1 ;

Fig. 5

a further possible embodiment of the edge protection in a corner region of the formwork element;

Fig. 6

a further possible embodiment of the edge protection in a corner region of the formwork element;

Fig. 7

a flow chart for the manufacturing process of a formwork element according to the invention;

Fig. 8

a further embodiment of a formwork element with edge protection;

Fig. 9

a section through an edge protection with a specific embodiment of a first guard edge portion.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the position information selected in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to a new position analogous to the new situation. Furthermore, you can too Represent individual features or combinations of features from the illustrated and described different embodiments of their own, inventive or inventive solutions.

All statements on ranges of values in the description of the present invention should be understood to include any and all sub-ranges thereof, e.g. the indication 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10, i. all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.

Fig. 1 shows a formwork element 1 for the production of components made of concrete, here for example in the form of a formwork panel 2, which comprises a flat base body 3, the edge of which is provided with a circumferential protective edge 4 made of plastic. The main body 3 of the formwork element 1 consists essentially of wood and / or a wood material that gives the shuttering element 1 the strength and stability required for use, while the protective edge 4 essentially serves to protect the edge region of the base body 3 from damage and moisture to be largely protected.

As a further protection against the influence of moisture on the base body 3, a plate surface 5 or two opposite plate surfaces 5, 6 each be provided with a cover layer 7, which shields the surface of the base body 3 made of wood or wood material from moisture and, for example, by a plastic surface, such as Polypropylene PP, lacquer is formed. On the base body 3 is given by cutting or formatting a circumferential edge surface 8, to which the protective edge 4 is attached. The encircling protective edge 4 is composed of several protective edge sections, wherein on first partial surfaces 9, 9 ', 9 "and 9"' of the peripheral surface 8 first protective edge sections 10, 10 ', 10 "and 10"' are arranged and on second partial surfaces 11, 11 ', 11 "and 11"' of the edge surface 8 second protective edge portions 12, 12 ', 12 "and 12"' are arranged. The first protective edge sections 10, 10 ', 10 "and 10"' each extend over the majority of the longitudinal edges or transverse edges of the main body 3, while the second protective edge sections 12, 12 ', 12 "and 12"' extend over corner regions of the main body 3 extend and at contact surfaces 13 each directly on an adjacent first guard edge portion 10 connect, whereby an uninterrupted and over the entire edge surface 8 extending protective edge 4 is formed. The protective edge 4 can of course also be referred to as edge protection, wherein both terms have the same meaning in this context.

At the contact surfaces 13, a first protective edge portion 11 and a second protective edge portion 12 are permanently and fully connected to each other, whereby the protective edge 4 is sufficiently resistant to the mechanical stresses and moisture influences occurring in use in the area of the contact surfaces 13. The connection to the contact surface 13 is mechanically highly loadable and waterproof due to the injection molding process used and the resulting intimate connection of the second protective edge section 12 to the first protective edge section 10.

The first guard edge portions 10, 10 ', 10 "and 10"' are made of a first plastic material having high mechanical wear resistance and high resistance to environmental influences such as moisture, concrete ingredients, chemical substances, elevated temperature, solar radiation and UV radiation.

The second guard edge portions 12, 12 ', 12 "and 12"' are exposed to comparable mechanical stresses and environmental influences as the first guard edge portions 10 and are formed of a second plastic material that is at least approximately identical to the first plastic material of the first guard edge portions 10 is, but may also consist of a second plastic material which has noticeably different properties of the first plastic material.

The first protective edge sections 10, 10 ', 10 "and 10"' which in the illustrated embodiment cover the majority of the longitudinal edges or the transverse edges of the main body 3, for example, in a continuous process at the edge surface 8 and can be made of semi-material of the relevant plastic material be formed, for example in the form of prefabricated strip material or as an endless roll material, which is applied in an appropriate length to the edge surface 8. For this attachment of the first protective edge portions 10, 10 ', ..., for example, all common bonding methods can be used in which high-strength and moisture-resistant adhesive systems are used can come. An example of a suitable adhesive system at this point is the use of PUR-Hot-Melt adhesive systems mentioned, which are characterized, inter alia, that they can harden both under the influence of heat and / or moisture and excellent adhesion of a protective edge 4 on the base body 3 achieved can be.

The second guard edge portions 12, 12 ', 12 "and 12"', which are arranged in the corner regions of the base body 3, are attached to the main body 3 and to the first guard edge portions 10, 10 ', ... by means of an injection molding process and extend respectively between two first protective edge portions 10. For the implementation of the injection molding an injection mold on the base body 3 with the already attached to this first protective edge portions 10 is arranged so that for the production of the second protective edge portions 12 each have a suitable mold cavity is created, on the one hand by molding elements the injection mold itself and on the other by a second part surface 11 of the edge surface 8 and end faces of the adjacent, first protective edge portions 10 is limited. Further details of this injection molding process will be discussed in more detail with reference to a further embodiment.

The formwork element 1 is according to the embodiment Fig. 1 formed by a rectangular formwork panel 2, but it is of course also deviating from the rectangular shape contours of the formwork element 1 conceivable, in particular other corner or rounded portions of the edge surface 8 of the body 3, wherein at rounded faces of the edge surface 8 both a first guard edge portion 10 as Also, a second guard edge portion 12 may be arranged. Thus, for example, edge materials can also be approached on rounded, approximately sectionally circular edge surfaces 8 using known methods. The second protective edge portions 12 are preferably provided on partial surfaces 11 of the edge surface 8, in which the edge surface 8 makes a change in direction, the partial surfaces 11 thus extend over a direction change section 14, which in the illustrated example the shuttering panel 2 corresponds in each case to a corner 15 of the base body 3.

Fig. 2 shows a section of a formwork element 1, namely a direction change section 14 in the form of a corner 15, which is approximately the bottom right corner in Fig. 1 equivalent.

In this case, at the edge surface 8 of the base body 3 at the longitudinal edge a first guard edge portion 10 and at the transverse edge another, first guard edge portion 10 'is arranged and extends therebetween a second guard edge portion 12 which comprises the base body 3 in the region of the corner 15 and quasi the Gap between the two first guard edge portions 10 and 10 'closes. By short dashes on the contact surfaces 13 while the permanent connection between the first guard edge portions 10 and 10 "and the second guard edge portion 12 is indicated.

In Fig. 2 is further indicated that a thickness 16 'of the second guard edge portion 12 may be approximately equal to the thickness 17 of the first guard edge portion 10' - in Fig. 2 the upwardly facing arm of the angular, second guard edge portion 12, corresponding to the shorter transverse edge of the rectangular formwork element in FIG Fig. 1 or that a thickness 16 of the second guard edge portion 12 may be greater than the thickness 17 of the first guard edge portion 10 - as in FIG Fig. 2 on the horizontal arm of the protective edge portion 12, corresponding to the longer longitudinal edge of the rectangular formwork element in Fig. 1 represented. This exemplified variation in the thickness 16 of the second guard edge portion 12 can be used to impart similar mechanical properties to the guard edge 4 at a strain approximately perpendicular to the guard edge 4, such as different degrees of hardness or elasticity between the plastic material of the first guard edge portion 10 and the plastic material of the second guard edge portion 12 to compensate. Thus, an approximately equal thickness 16 'of the second guard edge portion 12 and the thickness 17 of the first guard edge portion 10' is recommended when the two plastic materials have approximately equal elasticity, while, for example, in a plastic material of the second guard edge portion 12 with less elasticity compared to the plastic material of the first Protective edge portion 10 can compensate by the thickness 16 of the second guard edge portion is selected to be greater than the thickness 17 of the first guard edge portion 10, provided that both plastic materials have a higher elasticity than the base body 3 made of wood and / or wood material, which is generally believed can be.

Fig. 2 shows further that the edge surface 8 can be subsequently machined after attaching the first guard edge portion 10 while doing the contact surfaces 13 forming end surfaces of the first guard edge portion 10 for the connection can be prepared with the second guard edge portion 12. In the Fig. 2 shown limiting curve of the edge surface 8 is obtained, for example, when after the attachment of the first guard edge portion 10 in passing a milling tool is engaged, which rotates with perpendicular to the base body plane oriented axis of rotation and delivered in the dipping direction 18 transversely to the longitudinal edge of the formwork element 1, then the Base body 3 is further machined with movement of the milling tool parallel to the longitudinal edge with a constant measure and at the end of the base body 3, a further feed movement 19 is performed transversely to the longitudinal edge, which causes a curved outlet 20 of the peripheral surface 8 of the body.

It is advantageous if the legs of the angular, second protective edge portion 12, starting from the corner 15 extend on the finished formwork element 1 over a multiple of the thickness 16 along the edge surface 8, which in addition to the connection with the first guard edge portions 10, 10 ' at the contact surfaces 13, a large contact area between the second protective edge portion 12 and the base body 3 is achieved, and thereby a high mechanical strength is achieved against Abschervorgängen or Abschälvorgängen. A sufficiently large adhesive surface between the second protective edge section 12 and base body 3, a connecting surface 21 of the second protective edge section 12 with the first protective edge section 10 and possibly also the base body 3 corresponds to at least one third of the total circumferential surface of the second protective edge section 12. The total circumferential area corresponds to the entire surface of the second guard edge portion 12 considered as a solid body less the lying in the plate surfaces 5, 7 of the formwork element 1 faces. The entire surface may also be equated with the inner surface of the mold cavity for molding the second guard edge portion 12.

In Fig. 1 the illustrated second guard edge portion 12 further has at least in sections about a constant thickness 16, which can be assumed in these sections and largely constant mechanical properties.

Fig. 3 shows as an example of an alternative embodiment of a formwork element 1 a section of a corner 15 of a formwork panel 2, in which a rounded edge surface 8 of the base body 3 in the corner and the two adjoining straight edges - for example the longitudinal edge and the transverse edge of a rectangular basic body 3 is covered with a first, continuous protective edge section 10, and the corner 15 of the finished formwork element 1 is formed by a second protective edge section 12 which is injection-molded on an outer surface 22 of the first protective edge section 10. The outer surface 22 of the first protective edge portion 10 may be additionally subjected to processing in the region of the contact surface 13 before the injection of the second protective edge portion 12, with the durability of the compound can be increased. Thus, for example, by machining the provided with the first guard edge portion 10 corner area, the contact surface 13 can be increased, which in addition mechanical anchoring between the first guard edge portion 10 and the second guard edge portion 12 can be effected. Optionally, an additional anchoring of the second protective edge section 12 in the base body can be achieved by a bore which extends into the main body 3.

The contour of the edge surface 8 is rounded in this embodiment in the area of the later corner 15 in the form of a quarter circle, but in a modification thereto also by a trimmed chamfer or two indicated by dashed lines straight cuts against a rectangular formatted base body 3 at the corner 15th be defused, whereby this has a corner angle which is greater than 90 °, so for example 135 °. Compared to the rounded embodiment or the embodiment in Fig. 2 in which the contour of the edge surface 8 is machined by means of a cylindrical milling cutter, a contour of the edge surface 8 composed of straight sections can be produced in the region of an outside corner by means of two or more straight saw cuts.

A rounding or chamfering in the corner area is for the attachment of the first protective edge portion 10 of advantage, since when using plastic material in the form of semi-finished this has a certain inherent rigidity, and by avoiding sharp corners of the edge surface 8 in direction change sections 14, the attachment, in particular the circumferential adhesion of the first protective edge portion 10 is significantly easier in a train and the mechanical bond to the base body 3 is better.

In the execution according to Fig. 3 or with a chamfer in the corner region of the second guard edge portion 12 has a variable thickness 16, which also causes locally different mechanical properties of the second guard edge portion 12. However, since there is no abrupt change in the thickness 16 within the second guard edge portion 12, there is no risk of shock loads when pulling or pushing such a formwork member 1 over an edge of another item. The illustrated continuous change in thickness, as well as in Fig. 2 illustrated smooth transitions injection molding technology to ensure favorable flow conditions when injecting the second plastic material.

Fig. 3 shows in dashed lines an injection molding tool 23, with which the second protective edge portion 12 can be applied in the corner region of a base body 3 already provided with a first protective edge portion 10. For this purpose, the injection molding tool 23 has a shaped part recess 24 which, together with the edge surface 8 and the outer surface 22 of the already applied first protective edge section 10, delimits a mold cavity 25 which corresponds to the later, second protective edge section 12. In the injection mold 23, at least one feed channel 26 is arranged for this purpose, via which molten plastic material can be supplied to the mold cavity 25. The feed channel 26 or a feed channel system opens into at least one gate 27, possibly also in several sections 27 in the mold cavity 25, wherein the one or more gates are injection-suitably positioned. In order to accelerate the solidification of the molten plastic material of the second guard edge portion 12 and thereby shorten the required production time, preferably in the injection mold 23, a cooling system is arranged with the rapid cooling of the second guard edge portion 12 is promoted after the injection process.

In the execution according to Fig. 3 A modification of the corner formation is also possible insofar as the first protective edge section 10 has a joint 28 in the corner region which is closed when the second protective edge section 12 is sprayed on. At least one such joint 28 results when attaching a plurality of first guard edge portions 10 or even a single; integrally encircling first guard edge portion 10 on the edge surface 8 of the body 3 inevitably, which is advantageously placed so that it lies in a corner region and in consequence of a second guard edge portion 12 is covered and thereby closed. The distance between two end faces 29 of the first guard edge portions 10 is thus, similar to the embodiment according to FIG Fig. 1 or 2 , bridged, wherein the end faces 29 face each other and have only a relatively small distance from each other.

Fig. 4 shows a detail of a section through a formwork element 1 according to line IV - IV in Fig. 1 in the region of a second protective edge section 12 or in the region of a first protective edge section 10. The edge surface 8 of the main body 3 can thereby extend in a straight line between surfaces 30 of the formwork element 1 or be profiled, as shown in solid lines, wherein the profiling in FIG Fig. 4 is shown by way of example by a groove 31 indicated by dashed lines. The advantage of a blunt, straight edge surface 8 is the simple production of the edge surface 8, whereas an enlargement of the contact surface between the first protective edge portion 10 and the second protective edge portion 12 and the base body 3 can be achieved by profiling the edge surface 8. This enlargement of the contact surface can bring about a better anchoring to the main body 3 both for the first protective edge section 10, which is preferably applied by means of an adhesive method, and for the second protective edge section 12, which is attached by means of an injection molding process. The additional anchoring of the first protective edge portion 10 can be done by engaging in the groove 31, harpoon-like profile extensions.

Fig. 4 shows further that the surfaces 30 of the formwork element 1 by cover layers 32, which are connected to the base body 3, may be formed. These cover layers 32 cause a protection of the base body 3, which consists of wood and / or wood materials and / or wood-plastic composite, both against mechanical influences as well as exposure to moisture or other chemical substances in use in contact with the Shuttering element 1 can occur. Together with the protective edge 4, which is composed of first protective edge portions 10 and second protective edge portions 12, the cover layers 32 for the main body 3 form a protective barrier against externally acting mechanical loads, the influence of moisture and optionally also the influence of chemical substances. The cover layers 32 consist for example of plastic overlays or coatings, such as polypropylene PP or other thermoplastic or thermoset, reinforced or unreinforced plastics and are in particular glued or glued over the entire surface with the base body 3. As an alternative or in addition to a profiling, the edge surface 8 of the base body 3 can have one or more recesses 33, by means of which an additional anchoring in the base body 3 can be effected for a second protective edge section 12, which is applied by means of injection molding.

The thickness 17 of the first protective edge section 10 corresponds to between 0.1 times and 0.5 times the thickness of the base body 3. The base bodies 3 of formwork elements 1 often have a thickness between 15 mm and 35 mm, which in practice an average thickness of the first guard edge portion 10 of 2 mm to 8 mm has proved to be advantageous.

Fig. 5 shows a further possible embodiment of a formwork element 1 in a corner region 15, in which the first protective edge portions 10 are attached to straight edges of the base body 3, which are connected in the corner region 15 by means of a second guard edge portion 12. The contour of the edge surface 8 is produced in this embodiment by means of a milling cutter 34, whose axis of rotation 35 is oriented at right angles to the surface 30 of the formwork element 1. The dashed line indicates the path of the rotation axis 35 relative to the base body 3. In this embodiment, the second guard edge portion 15 is formed symmetrically with respect to the corner 15, wherein this symmetrical design of the corner can represent a structurally simple solution for other embodiments of a formwork element 1.

Fig. 6 shows a further embodiment of a formwork element 1, in which the base body 3 is preformatted at right angles and the edge surface 8 is changed compared to a rectangle only against it, that after attaching the first guard edge portions 10, for example by means of one or two saw blades, slots 36 in the main body. 3 are introduced, which can cause an additional anchoring of the second guard edge portion 12 with the base body 3. In the illustrated embodiment, the slots 36 are approximately parallel to an angular symmetry 37 of the corner 15. When these slots 36 are produced, the end faces of the previously attached, first guard edge sections 10 can be machined at the same time, as a result of which the later contact surfaces 13 are also produced. Due to the oblique design of the slots 36 are in the region of the contact surfaces 13, the contact surfaces between first guard edge portions 10 and second guard edge portions 12 are enlarged relative to a rectangularly oriented slot and thereby also an improved mechanical connection to the contact surfaces 13 between abutting protective edge portions 10, 12 can be effected.

• Formatierung 38 der Längskanten beispielsweise mittels eines Doppelendprofilers
• Kantenanleimen 39 der ersten Schutzkantenabschnitte 10 an den Längskanten des Grundkörpers 3
• Formatierung 40 der Querkanten des Grundkörpers 3 im Durchlauf beispielsweise auf einem Doppelendprofiler
• Kantenanleimen 41 der ersten Schutzkantenabschnitte 10 an den Querkanten des Grundkörpers 3
• Formatierung 42 des Grundkörpers 3 für die Anbringung der zweiten Schutzkantenabschnitte 12
• Anspritzen 43 der zweiten Schutzkantenabschnitte 12 an den Eckbereichen des Grundkörpers 3

Fig. 7 shows schematically and greatly simplified the process for producing a shuttering element 1 according to the invention, in which a possibly occupied with cover layers 32 base body 3 in a continuous process by the following process steps:

• Formatting 38 of the longitudinal edges, for example by means of a Doppelendprofilers
• Kantenanleimen 39 of the first protective edge portions 10 at the longitudinal edges of the main body. 3
• Formatting 40 of the transverse edges of the base body 3 in the passage, for example, on a double end tenoner
• Kantenanleimen 41 of the first protective edge portions 10 at the transverse edges of the base body. 3
• Formatting 42 of the base body 3 for the attachment of the second protective edge sections 12th
• Injection 43 of the second protective edge portions 12 at the corner regions of the main body. 3

In the Fig. 8 a further and possibly independent embodiment of the formwork element 1 is shown, again for like parts, the same reference numerals or component designations as in the preceding Fig. 1 to 7 be used. For provided with reference numerals, which are not specifically explained at this point, reference is made to the corresponding descriptions of the parts provided with the same reference numerals in other embodiments.

Fig. 8 shows a formwork element 1 in the form of a rectangular formwork panel 2 with a base body 3 made of wood and / or wood materials and / or wood-plastic composite and a circumferential protective edge 4. The protective edge 4 is prepared so that after preparation of an edge surface 8 by preformatting the Base body 3 is glued or glued to this a first protective edge portion 10 to the edge surface 8, which is up on a joint 28 extends integrally over the entire circumference of the edge surface 8. The base body 3 has four Richtüngsänderungsabschnitte 14 or corner regions in its rectangular basic shape, in which the edge surface 8 is provided with chamfers 44. These chamfers 44 or alternatively based on Fig. 3 Rounding described serve to easily guide the first guard edge portion 10 without sharp creases around the corner areas. Subsequently, the corners 15 of the formwork element 1 are produced such that in the corner regions or direction change portions 14 of the outer surface 22 of the first guard edge portion 10 by means of an injection molding second protection edge portions 12 are attached, wherein the injected plastic material of the second protection edge portions 12, the sharp-edged rectangular corners 15 of finished formwork element 1 are formed. Between the first protective edge section 10 and the second protective edge sections 12, a permanent connection is produced by the injection molding on the contact surfaces 13.

At the junction 28 - in Fig. 8 bottom right - the existing between the beginning and end of the first guard edge portion 10 distance is closed by the second guard edge portion 12 and the contact surface 13 extends to the end faces 29 of the first guard edge portion 10. The manufacturing method of this embodiment of a formwork element 1 can be similar to that of Fig. 7 Be the method described, wherein the formatting of the corner regions, ie here the preparation of the chamfers 44 immediately after the formatting 38 of the longitudinal edges and the formatting 40 of the transverse edges takes place. The attachment of the first guard edge portion 12 by edge banding 39 and 41 may optionally be combined into a single circumferential edge banding operation. The subsequent injection molding of the second protective edge sections 12 in the corner regions completes the formwork element 1.

Fig. 8 is thus an embodiment in which at three corners 15 of the formwork element 1 respectively the second guard edge portion 12 is connected only to the contact surfaces 13 with the outer surface 22 of the first guard edge portion 10 and at the corner 15 with the joint 28 of the second guard edge portion 12 in addition to the on the outer surface 22 and the end faces 29 of the first guard edge portion 10 lying contact surface 13 is also connected to the edge surface 8 of the base body 3.

The end faces 29, which are formed by end portions of the first guard edge portion 10 and form the joints 28, are in the embodiments according to the Fig. 1, 2 . 5, 6 . 7 and 8 in rectilinear portions of the edge surface 8, whereby the end portions are not subject to any curvature, which could possibly cause a detachment of the first protective edge portion of the base body due to bending stresses.

An in Fig. 9 shown in partial cross-section, another embodiment of a formwork element 1 may consist in that the first protective edge portion 10 is not made of a homogeneous plastic material, but in the thickness direction of the shuttering element from at least three sections 45a, 45b and 45c is composed, these sections 45a, 45b, 45c may consist of different plastic materials, which may also each have different mechanical properties. The sections 45a, 45b, 45c may be connected to each other by adhesive bonds, but advantageous is a production of the plastic material for the first protective edge portion 10 by a so-called coextrusion process, in which in an extrusion process various plastic materials are joined to form a one-piece extrusion profile, which is used as a semi-finished the first guard edge portion 10 is used. An advantageous embodiment of such a first protective edge portion 10 is achieved when the outer sections 45a and 45c made of a material high wear resistance and high toughness, such as thermoplastic polyurethane (TPU) and the intermediate portion 45b of a different material - preferably also TPU - is formed with higher elasticity and can effectively act as an expansion part, which can expand due to the influence of moisture in a possibly occurring change in thickness of the base body 3 and thereby the two outer sections 45a and 45b remain flush with the plate surfaces 5, 6 of the base body 3, because they can follow this change in thickness of the main body 3 due to the relatively elastic portion 45b, without the risk of detachment due to high shear stresses in the glued joint.

The embodiments show possible embodiments of the formwork element or a method for producing such, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather also various combinations of the individual embodiments are possible with each other and this possibility of variation due to the teaching of technical action by objective invention in the skill of working in this technical field expert. So are all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection.

For the sake of order, it should finally be pointed out that, for a better understanding of the construction of the formwork element 1, this or its constituent parts have been shown partially unevenly and / or enlarged and / or reduced in size.

The task underlying the independent inventive solutions can be taken from the description.

Above all, the individual in the Fig. 1; 2 ; 3; 4 ; 5; 6 ; 7; 8th . 9 shown embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

REFERENCE NUMBERS

1

An element

2

A form panel

3

body

4

protective edge

5

disk surface

6

disk surface

7

topsheet

8th

edge surface

9

subarea

10

First guard edge section

11

subarea

12

Second protective edge section

13

contact area

14

Direction changing section

15

corner

16

thickness

17

thickness

18

Immersion direction

19

infeed

20

outlet

21

interface

22

outer surface

23

injection mold

24

Formteilausnehmung

25

mold cavity

26

feed

27

bleed

28

joint

29

face

30

surface

31

groove

32

topcoat

33

recess

34

end mill

35

axis of rotation

36

slot

37

angle bisector

38

formatting

39

Edgebanding

40

formatting

41

Edgebanding

42

formatting

43

Injection - injection molding

44

chamfer

45

part Of

Claims (15)

Shuttering element (1) with protective edge (4), in particular shuttering panel (2) comprising a flat, bounded by an edge surface (8) base body (3) made of wood and / or wood material and / or wood-plastic composite and one at least one first partial surface (9) of the edge surface (8) arranged first protective edge portion (10) made of a first plastic material or a combination of a plurality of first plastic materials, characterized in that on at least a second partial surface (11) of the edge surface (8) of the base body (3) and / or on an outer surface (22) of the first protective edge section (10) a second protective edge section (12) made of a second plastic material is applied by means of an injection molding process, wherein the second protective edge section (12) at a contact surface (13) to the first protective edge section (10 ) and the second guard edge portion (12) on the contact surface (13) permanently connected to the first Schutzkantenabschnit t (10) is connected. Shuttering element (1) according to one of the preceding claims, characterized in that the plastic material or the plastic materials of the first protective edge portion (10) and the plastic material of the second protective edge portion (12) consist essentially of a permanently elastic plastic, in particular thermoplastic polyurethane. Shuttering element (1) according to one of the preceding claims, characterized in that the second protective edge section (12) via a direction change section (14), in particular a corner (15), the edge surface (8) of the base body (3) or a direction change section (14 ) of the outer surface (22) of the first guard edge portion (10). Shuttering element (1) according to one of the preceding claims, characterized in that the second protective edge portion (12) at least in sections a constant thickness (16) perpendicular to the respective edge surface (8) and outer surface (22). Shuttering element (1) according to one of the preceding claims, characterized in that the end faces (29) forming end portions of the first guard edge portion (10) are arranged on rectilinear portions of the edge surface (8). Shuttering element (1) according to one of the preceding claims, characterized in that at a direction change section (14) of the base body (3) or the first guard edge portion (10), in particular a corner (15), the thickness (16) of the second guard edge portion (12 ) measured along an angular symmetry of two adjoining the direction change section (14) edge surfaces (8) between the 5-fold and 15 times the thickness (17) of the first guard edge portion (10). Shuttering element (1) according to one of the preceding claims, characterized in that the first protective edge portion (10) is connected over its entire surface and blunt with the edge surface (8) of the base body (3) and the second protective edge portion (12) is flush with the edge surface (FIG. 8) of the base body (3) and / or the outer surface (22) of the first guard edge portion (10) is connected. Shuttering element (1) according to one of the preceding claims, characterized in that the edge surface (8) or the outer surface (22) under the second protective edge portion (12) at least one recess (33), in particular in the form of a slot or a bore, in the base body (3) and / or the first protective edge portion (10) or along the edge surface (8) of the base body (3) and / or the outer surface (22) of the first guard edge portion (10) extending profiling, in particular at least one groove (31) , Shuttering element (1) according to one of the preceding claims, characterized in that the first protective edge portion (10) in the thickness direction of the base body (3) from at least three sections (45a, 45b, 45c) is composed, the two the plate surfaces (5 , 6) nearest partial sections (45a, 45c) of plastic material having at least approximately identical mechanical properties are formed and the at least one intermediate section (45b) with respect to the sections (45a, 45c) has a higher elasticity. Method for producing a formwork element (1) with protective edge (4), in particular a formwork panel (2), comprising formatting a planar basic body (3) made of wood or wood material for producing an edge surface (8), attaching a first protective edge section (10) from one first plastic material on a first partial surface (9) of the edge surface (8) by means of an adhesive method or a Anspritzverfahrens, characterized in that subsequently a second protective edge portion (12) made of a second plastic material on a second partial surface (11) of the edge surface (8) and / or on an outer surface (22) of the first guard edge portion (10), wherein the second guard edge portion (12) by means of an injection molding using the base body (3) and a portion of the first guard edge portion (10) embracing injection mold (23) on a Contact surface (13) directly to the first Schutzkantenabschnit t (10) is then arranged and in the attachment of the second guard edge portion (12) on the contact surface (13) a permanent connection between the first guard edge portion (10) and the second guard edge portion (12) is prepared. Method according to one of the preceding claims, characterized in that the connection of the second guard edge portion (12) with the first guard edge portion (10) on the contact surface (13) by a Anschmelzvorgang and / or a welding operation is made. Method according to one of the preceding claims, characterized in that the first protective edge portion (10) at least approximately to the entire edge surface (8) of the base body (3), in particular in one piece, is attached. Method according to one of the preceding claims, characterized in that the first protective edge portion (10) is attached as a prefabricated edge material. Method according to one of the preceding claims, characterized in that before the attachment of the second protective edge section (12) the contact surface (13) on the first protective edge portion (10) and / or the edge surface (8) of the base body (3), in particular in a continuous process, is subjected to a machining process. Method according to one of the preceding claims, characterized in that on the edge surface (8) of a base body (3), a continuous first guard edge portion (10) or a plurality of first guard edge portions (10, 10 ', 10 ", 10"', ... ) and subsequent to direction change portions (14) of the outer surface (22) of the continuous first guard edge portion (10) or at joints (28) between first guard edge portions (10, 10 ', 10 ", 10"', ...) the second Protective edge portions (12) are attached by means of an injection molding process.

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