DE7344578U - Lightweight construction element for buildings - Google Patents

Description

DH. ING. E. HOFFBf ANN · DIPt. ING. W. ' EITLE DR. RER. NAT. K. HOFFMANN //} PATK NT AW W ALTB D-8000 MÖNCHEN 81 · ARABELLASTRASSE 4 ■ TELEPHONE (0811) 911087

MATTHIAS REICHENBERGER, 8229 Pldlng

Lightweight construction element for buildings

The present innovation relates to a lightweight construction element for buildings, consisting of at least two adjoining and interconnected panels or molded parts made of insulating material, such as wood wool lightweight panels, Hard foam laminated panels, hard fiber panels or the like.

Lightweight construction elements of this type are, for example, in the form of roller shutter boxes or the like in the various

known for a long time.

So there are embodiments that consist of a U-shaped Composed hard fiber molded part that is attached to a hard foam panel is foamed. The molded hard fiber part represents the load-bearing core, while the Foam layer of the rigid foam layer board eroringt the necessary insulating properties of the lightweight construction element. Such embodiments with hard fiber molded core have excellent properties in relation to on the strength and the insulating effect. However, they have the disadvantage that the manufacturing costs for the hard fiber molded part core is considerable and thus the total costs for the lightweight construction element are relatively high.

In a further embodiment, instead of the hard fiber molded part core, one of a total of three is U-shaped Composed hard foam layer panels formed load-bearing jacket used, the inner surface of which to achieve the necessary insulating effect is lined with a strong styrofoam or polyurethane foam layer. This embodiment also has excellent properties in terms of strength and insulating effect. The supporting coat is also cheaper to manufacture than a hard fiber molded core. The production of the styrofoam or polyurethane foam layer on the inside of the bearing jacket is relatively expensive, since the layer can be produced in costly individual forms got to. In addition, the two materials used, namely the rigid foam layer plates forming the load-bearing jacket and the foam layer on the inside naturally have a different behavior towards moisture and the effects of heat. This leads to,

that such lightweight components tend to warp. This is a significant drawback, especially with roller shutter boxes. part, since there is a risk that warping will impair the functionality due to the cramped interior space. For example, in practice it often happens that a roller shutter is warped The shutter box cannot be pulled out.

It is also known to use lightweight construction elements, in particular box-like shape to produce from plate materials by removing this plate material at its later kink Milled to a certain depth, then bent at a predetermined angle and the The resulting V-shaped gap on the outside of the lightweight construction element is then covered with polyester or a similar one Material is filled out. However, such a production method has the disadvantage that at the kinks only obtuse angles can be formed. A right-angled turn is not possible because of the danger the breaking up of the residual material in 'area of the There are kinks during the bending process. The strength of such lightweight construction elements can also not be high Requirements. In addition, the for the production of box-shaped lightweight construction elements only possible polygonal shape of such lightweight construction elements very disadvantageous during installation, since the smooth outer b.-w. Inner surface of the V / and is interrupted.

The aim of the present innovation is to create a lightweight construction element with comparable strength and Is easier and cheaper to manufacture insulation values with little technical effort than lightweight construction elements of the known kind.

This goal is achieved according to the invention that the plate or molded parts in the area of their adjoining Edges are connected to one another by a plastic foaming foam intermediate layer.

The solution according to the innovation allows the production of lightweight construction elements from insulating panels without assistance a supporting core. This is due to the innovation according to the connection of the adjoining Plates or molded parts reached. In addition, lightweight construction elements of any shape and size can be produced without the need for special, expensive shapes that can often only be used for certain sizes are. All that is needed to manufacture the new lightweight construction elements is commercially available panels or molded parts Shape cut to the desired dimensions and after assembling in their final position to each other be connected by means of the plastic foaming foam intermediate layer. Practice has shown that in particular Polyurethane blowing foam is excellently suited as a plastic blowing foam intermediate layer.

For lightweight construction elements that can withstand higher loads, it is expediently, the interconnected panel or molded parts in the area of their mutually adjoining edges to be provided with grooves or recesses to be filled with the plastic blowing foam of the intermediate layer are. The "dowelling" of the adjoining panel or molded parts achieved in this way results Festip; keitswerte that also place a higher load on the Allow lightweight construction elements without the risk of destruction. Lightweight construction elements designed in such a way can therefore not only be used as roller shutter boxes, but

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also as permanent formwork for columns, walls and ceilings and as a shell for hollow body ceilings use. An adaptation of the shape of such lightweight elements to the respective circumstances is possible at any time without great technical effort even possible at the construction site.

A further increase in the strength of such lightweight construction elements is used for panels or molded parts that join at an acute, right or obtuse angle achieved in that the plastic blowing foam not only as an intermediate layer in the area of the adjoining Edges, but also in the form of a reinforcing wedge in the one connected at an angle Plate or molded parts formed gusset is arranged. Such a training provides a excellent strength in the area of the corners of such lightweight construction elements. The height of the reinforcement wedge effective gusset filling can, depending on the respective circumstances, approximately the wall thickness of the panel or molded parts.

A gusset filling that can be produced with the simplest of technical means in the case of the right or approximately right Angle connecting plate or molded parts has a triangular or channel-like cross-section, because there is only a straight or curved end-stop strip Manufacturing process before filling in the plastic blowing foam in the area of the gusset of the adjoining Plates or moldings must be arranged.

Excellent dowelling of the adjoining

The plate or molded part is achieved by a groove or recess which has a rectangular cross-section and runs in the longitudinal direction of the edge of the plate or molded part in such a way that a channel is formed in the area of this edge in which the plastic blowing foam can anchor itself well. When in the form of hollow bodies lightweight elements produced, it is desirable that grooves or recesses in such a way ode in the panels: to arrange "Part edges, that the parts fit together to form an interspace Conveniently, this engagement of the parts is provided so that the plastic blowing foam intermediate layer. with a given load, the main load is always pressure.

Excellent strength values with a relatively small amount of PU foam have been found when using Result plate parts, which are designed as so-called hard foam layer plates, i.e., on both sides the hard foam layer carry wood wool lightweight panels. The hard foam layer prevents namely by their relative closed surface that the expanding PU foam is too large in the large cells the wood wool lightweight panels lose. It is therefore advantageous to add panels or molded parts if necessary use which are only equipped with a hard foam layer in the area of their edges or edges.

Lightweight construction elements can also be used in the innovative way Manufacture, which consist of butt with their edges adjoining flat plates. To this V.'r.'ise can be made from plate parts of commercially available sizes Plat tenfOi'inat.e of any dimension in a simple manner

getting produced. The connection is so good that, as practice has shown, the usual ones large-area panels composed of commercially available panel formats frequently occurring cracking can be completely avoided.

A further increase in the strength of lightweight construction elements according to the invention can be achieved in that in the plastic foaming foam intermediate layer in the panels or molded parts anchored reinforcing iron, reinforcing wires, pins or battens.

The following are those shown in the drawings for further explanation and for a better understanding of the innovation Embodiments described in more detail;

Pig. '. shows schematically in a sectional view, partially broken off, an exemplary embodiment of a corner formation of a lightweight construction element according to the innovation,

Fig. 2 shows schematically in a sectional view, partially broken away, a further embodiment of a corner formation of a renovation wet Lightweight construction element,

Fig. J5 shows schematically in a sectional view, partially broken off, a third embodiment of a corner formation according to the innovation Lightweight construction element,

Fig »^;: -; shows schematically in a sectional view partially canceled an embodiment

a lightweight construction element formed from butt jointing flat plate parts, according to the section line IV-IV of FIG. G,

Fig. 3 shows schematically in a sectional view and partially broken off a further embodiment of a butt-joined Lightweight construction element formed flat plate parts and

6 shows a large-area composed of five flat plate parts of commercially available dimensions Lightweight construction element according to the innovation

In the corner formations shown in FIGS close plate parts 1 and 2 at right angles to each other. The connection of these contiguous According to the innovation, panel parts are made by means of a plastic foaming foam intermediate layer S.

In the corner formation shown in Fig. 1, this is in of the drawing vertically extending plate part 2 equipped with a groove 7 which extends in the longitudinal direction of the Plate front edge runs. Through the groove 7 two webs are formed, of which the inner web around the Amount C is shorter than the external web, on the face of the external web the horizontally arranged plate part 1 in such a way that a smooth continuous vertical outer side surface of the plate sides 1 and 2 is formed. The plastic drift foam intermediate layer In the exemplary embodiment shown in FIG. 1, S not only fills the groove 7,

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but also the gusset between the plate parts 1 and 2 in such a way that a reinforcing wedge 5 is formed from plastic blowing foam.

The embodiment shown in Fig. 1 has the Advantage that for the production of the plastic foaming foam intermediate layer only a shuttering in the area of the reinforcement wedge 5 is necessary. The outer surface of the corner formation is also uniform, because the plate part 1 in the area of the outside of the corner formation fully on the outer web of the plate part 2 rests.

Tests have shown that one designed on this catfish Corner training is very resilient and therefore enables the production of solid lightweight construction elements.

In Fig. 2, a corner connection is shown, which can also be relatively heavy. This high load capacity is achieved in that the plate part 1 is provided in the region of its edge with a groove 6 into which the plastic blowing foam can penetrate and anchor itself during its expansion. The edge of the plate part 2 is also equipped with a groove 7, which also enables the plastic blowing foam of the intermediate layer S to be anchored. In order to ensure particularly good strength values when the plate part 1 is loaded in the direction of arrow P, the edge of the plate part 1 provided with the groove 6 is pushed by the amount B into the L-shaped plate edge of the plate part 2. The plastic foaming foam intermediate layer S is therefore in the case of this load

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assumed only stressed by pressure.

Even in the case of the in E'ig. 2 illustrated embodiment - example is the strength of the connection between the two plate parts 1 and 2 not only through the plastic intermediate layer S, but also through the reinforcing wedge connected to this plastic intermediate layer 5 made of plastic blowing foam.

In the corner formation shown in Fig. 3 is it is an embodiment that is suitable for low loads. The two at a right angle adjoining panel parts 1 and 2, preferably hard foam layer panels, are arranged in relation to one another in such a way that that the horizontally extending plate part 1 is the upper end edge of the vertically extending plate part 2 overlaps at a small distance A.

An angle 3 is used to fix the position on the outside of the corner formation and a sound bar 4 on the inside. Both the angle 3 and the sound bar, together with the panel parts 1 and 2, enclose a space into which the plastic blowing foam is filled as an intermediate layer S. .

In Fig. 6, a lightweight construction element is shown, which consists of a total of five flat plate parts 8 commercially available Dimensions is composed. A plastic blowing foam intermediate layer also serves as a connection in the present exemplary embodiment S, their shape and arrangement in FIGS. 4 and 5 on an enlarged scale according to the section line IV-IV is shown in FIG. In the exemplary embodiments, the edges are the adjoining

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flat plate parts B each provided with a groove 9, in which the plastic foaming foam intermediate layer S engages and thus also with regard to higher loads reliable connection between the plate parts 8 establishes.

Practice has shown that in the case of using lightweight elements according to FIGS. 4 to 6 as a wall element the dreaded plaster cracking is wrong. Area of impact does not occur.

By arranging a reinforcement (e.g. wire mesh or the like) in the grooves 9, the strength the connection can be increased significantly.

For the sake of clarity, in FIGS. 1, 2 and ″ a representation of the schematically indicated Formwork elements 3 and 4 have been disregarded.

Of course, within the scope of the innovation, it is also possible by arranging spacers, which are z \: corner-wise are to be anchored in correspondingly deep grooves, concrete cladding elements from two irn Manufacture spaced-apart shells from lightweight panels.

For the production of lightweight construction elements with the smallest possible wall thicknesses, it is advisable to use the panels or For example, molded parts should be thickened in the area of their edges. This can also be done with panels or molded parts with a small wall thickness in the area of the connection points a good connection through the plastic blowing foam wiper layer be achieved. the

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The extraordinarily high strength of the connection between the adjoining panels or molded parts through the plastic foaming foam intermediate layer S is, according to the innovation, due to the fact that the plastic foaming foam is poured into the connecting area
before the actual curing process expands considerably and thus presses itself firmly against the free surfaces of the plate parts 1 and 2 and anchors itself in their pores. This adhesion is renewed by the arrangement of grooves in the corresponding plate parts due to the "dowelling" achieved in the plastic Tj ^
Foam in between increased.

Claims (10)

Protection claims 1. Lightweight component for buildings, consisting of at least two adjoining and interconnected panels or molded parts made of insulating material, such as wood wool lightweight panels, hard foam laminated panels, hardboard and the like, characterized in that the plates or shaped parts (1, 2, 8) in the area of their adjoining Edges are connected to one another by a plastic foaming foam intermediate layer (S) ./ 2. Lightweight construction element according to claim 1, characterized in that the plastic blowing foam intermediate layer (S) is made of polyurethane foam. / 3. Lightweight construction element according to claim 1 or 2, characterized in that the interconnected plate or molded parts (1, 2, 8) in the The area of their adjacent edges are provided with grooves or recesses (6, 7, 9), which are covered with the plastic blowing foam the intermediate layer are filled. / 4. Lightweight construction element according to claim 1, 2 or j3 with connecting at an acute, right or obtuse angle Plate or molded parts, characterized in that the plastic blowing foam intermediate layer (S) in addition to the panels or molded parts that are joined together at an angle V \ (1, 2) fills the gusset formed. / 5. Lightweight construction element according to claim 4, characterized in that characterized in that the height of the gusset filling corresponds roughly to the wall thickness of the panels or molded parts (1, 2). / 6. Lightweight construction element naoh claim 4, for contiguous at right or approximately right angles Plate or molded parts, characterized in that the gusset filling is triangular or has channel-like cross-section. 7. Lightweight construction element according to claim J>, characterized in that the grooves or recesses (6, 7, 9) are rectangular and run in the longitudinal direction of the edge of the panel or molded part in such a way that the edges have a channel-shaped cross-section. 8. lightweight construction element according to claim 7 * characterized in that the grooves or recesses (7) are rectangular and staggered in depth are arranged next to one another and run in the longitudinal direction of the edge of the panel or molded part in such a way that that the edges have an approximately L-shaped cross-section /. 9. Lightweight element according to claim 3 and 4, characterized in that the adjoining Plate or molded parts directly on the outside of the angle to create a uniform exterior view rest on each other., 10. Lightweight constructions learn from one another; or more of the - 1· - 1-3 - The preceding claims, characterized in that dgJ3 in the plastic blowing foam 7, v; ischenschicht (S), preferably reinforcing bars anchored in the plate or molded parts, reinforcing wires, Include tenons or battens.