DK164186B - FRAME BUILDING PART - Google Patents

Abstract

1. A frame component (1) with an inserted filling (4) for window or door frames composed of hollow-section members (1) connected to one another at the corners, having a rib (7), which is preferably disposed at the outside of the frame, and a plastics retaining strip (11), particularly of impact-resistant rigid PVC, which is inserted in the frame subsequently, preferably at the inside, to hold the filling (4), for example a pane of glass (4), wherein both the rib (7) and the retaining strip (11) each rest with a flexible seal (14, 15) against the filling (4), under prestressing, and wherein the seal (14) of the retaining strip (11) is coextruded with the latter, while the seal (15) of the rib (7) is inserted in a corresponding groove (8) and has a section of high flexibility which is substantially subjected to bending stress, characterised by the following features : the seal of the retaining strip (11) is constructed in the form of a support (14) for the retaining strip (11), which support is ribbed at its surface adjacent to the filling (4), is subjected substantially to compressive stress and has little flexibility ; the seal (15) pushed into the rib (7) is constructed in the form of a hollow-section flexible tube (15) ; the hollow-section flexible tube (15) consists of synthetic rubber with a high elastic flexibility, particularly of EPDM ; the sealing support (14) coextruded with the retaining strip (11) consists of the following materials : (a) 40 to 60 parts, particularly 50 parts, of chlorinated polyethylene with a chlorine content of 30 to 42%, particularly 36%, (b) 20 to 30 parts of polyvivyl chloride with a k-value of 58 to 78, preferably 70, and a plasticizer sorption of at least 30% (according to DIN 53417, part 1), and (c) 20 to 30 parts of nitrile rubber NBR with a ratio of butadiene to acrylonitrile of from 55 to 45 to 82 to 18, particularly 67 to 33.

Description

DK 164186 B

in

The present invention relates to a frame part with inserted filling for window and door frames and consisting of hollow profile rods interconnected at the corners of the frame of the type specified in the preamble of claim 1.

Such a frame part appears from German Offenlegungsschrift No. 2,347,066 and has a rib located on the outside of the frame and a later, preferably plastic insert strip inserted at the inside of the frame, preferably of impact-resistant hard PVC for retaining the filling, e.g. may be a glass pane, the ribs and the holding strip with a resilient seal abutting the filling under prestressing, the seal on the holding strip being coextruded therewith, while the seal along the rib is inserted into a corresponding groove and comprises a profile with high elasticity , which profile is essentially influenced to bend.

Furthermore, a sealing strip with a ribbed surface is known from GB-A-1,174,093 and from NL-A-8201884. Also known from NL-A-7211692 is a sealing strip with a ribbed surface, the sealing strip being made of an elastomeric material, preferably ethylene vinyl acetate copolymer.

The seals used with such a frame part have a very long deformation path and are therefore also suitable for accommodating relatively large dimensional deviations in the thickness of the frame and in corresponding dimensions in the frame and of the filling.

Thermoplastic materials, especially thermoplastic types containing a plasticizer, tend to break down high stresses which have arisen as a result of deformations after prolonged loading, so that the known seal no longer abuts the filling with sufficient tightening. This has a significant effect on the sealing effect, because such a loosely arranged sealing lip cannot prevent the ingress of moisture. In addition, the known seal is also no longer able to hold the filling, which often has to absorb significant forces (eg wind forces) in place.

The object on which the invention is based is 2

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therefore to provide a frame part of the kind mentioned in the introduction, by which a reduction of the pressure at the seals or the associated solution of the filling can be avoided or at least reduced to an innocuous extent.

This task is solved by a frame part which, according to the invention, is characterized by what is stated in the characterizing part of claim 1.

Advantageous embodiments are defined by what is stated in the dependent claims.

The advantages obtained with the invention are due to the fact that the seal at the holding strip is no longer, as hitherto, only equipped with sealing strips which are subjected to bending and are therefore highly loaded and resilient, but are designed as a grooved, substantially pressure-exposed contact surface. , which is only slightly deformed during the installation of the filling. The voltages generated are therefore small and are therefore correspondingly poorly degraded over time. Similarly, the permanent proportion of the deformation is also small, and the decrease in the pressing force remains in an area where it can be easily absorbed by the opposite, permanently elastic seal.

The latter is preferably designed so that it has a high degree of compressibility with a flat extending elasticity curve.

By avoiding the high bending stress, at which only a relatively small deformation occurs in the pressure direction, and by choosing a suitable cross section which ensures the compressive strength of the thermoplastic sealing material, it is ensured that the conditions of the thermoplastic seal 30 are not below its service life changes impermissibly sharply. The necessary equalization of tolerances, as well as the necessary prestressing, is obtained on the other side of the filling in that the seal on the rib is designed as a profile with high resilience, as it is essentially based on bending.

This seal maintains the necessary prestress, as, as mentioned above, it is not formed of a thermoplastic material, but of a durable elastic elastomer.

The seal at the holding strip thus only forms an an- 3

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strokes which are deformable only to such an extent that it can compensate for irregularities in the surface of the filling and the holding strip, and can provide the necessary tightness.

If the frame part according to the invention is placed on the outside of a building, it is preferred that the holding strip with its sealing system is arranged inside the building.

According to an embodiment of the invention, the sealing plant is designed flat with solid, longitudinally extending beads projecting in the direction of the filling. These may have a blunt, roof or serrated profile. Preferably, the bead profile is rounded. The profile must be designed in such a way that a bending of the free edges of the bead is in any case avoided in order to avoid bending loads and thus high stresses. Therefore, preferably the free edges of the longitudinal beads are strongly rounded. A principle of shape as a circular section for a semicircular profile is advantageous with respect to the extrusion and allows a favorable stress distribution.

In the design of these longitudinal beads, the pressure stresses occurring in the thermoplastic material and in themselves low compressive stresses in the direction of the holding strip will quickly become smaller when these abut the filling, and become so small that the thermoplastic material no longer flows, whereby the tension thus remains.

The enclosed angle between the flanks of said longitudinal beads is preferably not less than 60 °.

Preferably there are two beads. If the two beads have a sawtooth profile, these are preferably arranged so that the flattering flank of the bead always points away from the center of the filling, so that the steeper flank faces the center. This improves the sealing effect of the longitudinal beads.

According to a preferred embodiment according to the invention, a sealing lip abutting against the associated frame bar is further formed with a sealing lip abutting the filling, which in turn faces 4

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the center of the filling and which, with the end facing away from the holding strip, abuts the filling. Such a lid-shaped or lip-shaped sealing strip formed of thermoplastic material is in principle loaded for bending, so that the described tension reduction in the material on this strip can take place. However, this is harmless, as the thermoplastic sealing plant, as already stated, does not act as a tolerance equalization, but only as a limited resilient stop, so that a largely stress-free, tight arrangement of the 10 lip-shaped strip against the filling is sufficient to form a further seal to increase safety. In this way, in contrast to the conventional term, the sealing system only forms a seal as a side effect. The main task is the formation of a counter bearing for the filling. The seal in the functional sense is taken over by the lip.

As mentioned above, the longitudinal beads can also have a roof profile, even if a wedge gap is formed between the bead flank and the filling, which is open towards the middle of the filling. Especially when this roof-shaped design of the longitudinal strips 20 coincides with the use of a sealing lip, this takes over the sealing function.

The lip can be coextruded in a suitable place by the holding strip and separated from the sealing device. However, it is preferred that the seal and lip form a single seal together to simplify manufacture.

The surface of the sealing plant abutting against the filling can also be designed in the form of, for example, 3 ribs or also only a single rib, provided that the surface is designed in such a way that the plant, upon compression against the filling, already after a short deformation path does not give further , because already after a short distance from the flanks of the ribs or beads of the loaded material cross-section which first come into contact with the filling, they become so large that the compressive stress becomes correspondingly small.

If there are several beads, for example according to fig. 4 the bead located closest to the center of the filling can also be designed as a seal and correspondingly be located at the

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the center closest edge of the sealing strip.

The synthetic rubber, preferably EPDM, preferably serves as the material for the seal inserted into the rib.

This seal can, for example, be a many lip seal, if 5 cross-sections in the first line are loaded for bending. However, in order to obtain a particularly high load capacity at the same time as a good sealing effect, it is proposed according to the invention that the seal inserted into the rib is designed as a hollow profile hose, if the sections abutting the filling provide the seal, while the filling between rib and rib section is loaded for bending and thus allows a high deformation without the abutment force against the filling producing the deformation having to be particularly large.

Furthermore, it may be advantageous to stiffen this hollow profile hose by means of a transverse strip which preferably extends obliquely with respect to the direction of compression.

In order to obtain a better seal, according to an embodiment according to the invention, a sealing lip is also formed at least on the hollow profile hose, which lip extends in the direction towards the center of the filling.

Since the seal inserted into the rib is preferably located on the outer side, the further lip seal prevents water from penetrating into the area between the filling and the adjacent hollow profile hose, which in turn is deformed by the occurrence of tolerances.

The material hitherto used for thermoelastic coextruded seals is soft PVC, which, however, has a tendency to travel the plasticizer and extract it, which further causes it to become brittle over time and the adhesion to the holding strip to disappear.

The sealing system can, for example, consist of a soft polyethylene.

In order to improve the resilience and elasticity 35 of the seal developed as a sealing plant, it is proposed according to the invention that the thermoplastic material from which it is made is composed according to claim 1. A 6

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such material is significantly more resilient than soft PVC.

Furthermore, during the assembly it is also possible to weld the materials together without further ado, since no evaporation of the plasticizer can occur here, and the material cannot become brittle. Holders of arbitrary length can thus be welded together without problems and these can be welded together on miter.

This preferred base material can be further improved in terms of aging resistance and resilience / and dyed by the addition of aggregates as claimed in claim 7.

The preferred embodiment according to the invention will be described in more detail below with reference to the drawing, which shows an exemplary embodiment. In the drawing, fig. 1 is a cross-section through a frame rod of the frame according to the invention approx. life-size, fig. 2 shows the detail A according to FIG. 1 on an enlarged scale, fig. 3 shows a second embodiment of the device according to FIG. 2, and FIG. 4 a third embodiment of this.

The one in fig. 1, a highly schematic frame bar comprises a moldable hollow profile bar 1, which has a surface 2 facing the interior of the building 25 and a surface 3 facing it towards the outside of the building, as well as a transverse surface 5 facing a filling formed as a double glazing 4.

Near the surface 2, the frame rod 1 is extended in the direction of the glass pane 4 in the form of a protruding strip, in which a groove 6 facing away from the rod 1 is formed.

On the outside 3, the frame rod 1 is extended in the direction of the double pane 4 with a projecting rib 7, which has a surface parallel to the surfaces 2,3 and facing the glass pane 4, in which there is another groove 8.

3 ^ The one facing the glass pane 4, between it with the groove. 6 fitted list and rib 7 placed recess is filled 7

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by means of an inlaid profile rod 9, between whose surface facing the glass pane 4 and the glass pane a tolerance-equalizing insert 10 is arranged.

A holding strip 11 is inserted in the groove 6, which is designed as a hollow profile rod. One of the side walls of this retaining strip 1 1 abuts against the surface of the strip on the rod 1, as well as against the surface of the rod 9 and has an anchoring strip engaging in the groove 6. A second wall of the holding strip 11 extends perpendicular to the latter wall and forms with the surface 2 of the rod 1 a smooth, inner surface. The wall 12 of the holding strip facing the glass pane runs approximately parallel to the glass pane 4 and is somewhat longer than the wall flush with the inner surface 2 of the rod, so that the edge of the latter wall facing the filling and the wall 12 are connected to each other. by means of a fourth wall 13 extending obliquely relative to the glass pane 4.

To that extent, the construction described as an exemplary embodiment is known.

The wall 12 has a step-shaped notch towards its surface facing the glass pane 4, into which a coextruded, resilient sealing system 14 extends, which also extends into the wall 13.

The sealing plant 14 and the adjacent walls 12, 13 of the holding strip 11 are denoted by A and shown on an enlarged scale in FIG. 2, as well as in another embodiment of FIG. 3, which is also described below.

The sealing system 14 forms on the inside of the frame an only to a limited extent resilient end stop for the glass pane 4 with a steeply rising, upwardly curved spring characteristic.

Between the outside of the glass pane 4 and the surface of the rib 7 facing it on the rod 1, an EPDM hose 15 is inserted, which is compressed between the said surfaces into an oval shape. The spring characteristic of this compression movement of the hose increases flat.

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At its side facing the rib 7, the hose 15 has a fastening strip with a wedge-shaped cross-section which fits into the groove 8 recessed at this point in the rib 7.

This strip 16 is extended through the inner rim 5 of the hose 15 to form an obliquely extending transverse wall 17.

In the area at the hose 15, where it faces the glass pane 4 and away from the rod 1, an elastic lip 18 pressed against the glass pane 4 is formed.

In FIG. 2, the simplicity A according to FIG. 1 shown on a larger scale.

As can be seen, the sealing system is inserted in a step-shaped recess both in the wall 12 and in the wall 13, it being ensured by corresponding crimping that the walls 15, 13 have a substantially uniform wall thickness. The sealing device 14 has a section which is connected to the wall 12 by coextrusion and whose surface 21 facing the glass pane 4 runs parallel to the wall 12.

Protruding from this surface 21 are two longitudinal beads 20 having approximately a sawtooth-shaped profile, with an approximately right-angled flank extending on the surface 21, which faces a sealing lip 22 described below, and a surface facing in the opposite direction relative to the surface 21 extending flank. The angle between the two 25 flanks is approx. 70 °, however, the edges of the two longitudinal beads 19 and 20 facing the glass pane 4 are strongly rounded.

The height of the two longitudinal beads 19,20 above the surface 21 corresponds approximately to the thickness of the sealing device 30 14 between the surface 21 and the wall 12 of the holding strip 11.

The width of the two longitudinal beads measured in height with the surface 21, as well as the mutual distance, constitute somewhat more than twice the thickness of the sealing device 14 measured between the surface 21 and the wall 12 of the holding strip 11.

The height of the longitudinal beads is preferably approx.

9

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1.25 now, width approx. 3 mm.

At the transition between the walls 12 and 13 on the holding strip 11, a long, tapered sealing lip 22 extending from this transition area towards the center of the glass pane is formed, which in fig. 2 is shown in the resting position, in which it projects far beyond the connecting line between the two free edges of the longitudinal beads 19,20. In the assembled state (cf. Fig. 1), however, this sealing lip 22 is strongly deformed (in Figs. 2 and 3 upwards), whereby it abuts sealingly against the glass pane 4, if the surface facing the sealing lip 2 abuts against the only slightly compressed longitudinal lists 19, 20, and thus approximately coincide with the above-mentioned connecting line.

The embodiment according to fig. 3 substantially corresponds to the embodiment according to fig. 2 with the exception that (with retained overall dimensions) the longitudinal beads 23,24 are no longer sawtooth-shaped like the longitudinal strips 19,20, but roof-shaped, having a cross-section as a flat, isosceles, at its tip strongly rounded triangular. 20 edge.

FIG. 4 shows an embodiment of the extruded, pressure-actuated sealing system, in which the lid seal 22 is not present. At the seal according to fig. 4, the sealing abutment 21 is also formed with two ribs or beads 30 and 31. The rib 30 here appears as a flat domed ridge extending near the center in the height direction of the seal 21, while the second rib 31 like the ribs 20 and 21 according to fig. 2 is formed and is located near the upper edge, so that the free rounded edge of the seal 31 30 also takes up the task of the lid seal 22.

To ensure the latter, the rib 31 is somewhat steeper and higher than the rib 30, so that the rib 31 in all cases comes into abutment against the filling 4..

In that the action of the rib 31 substantially also receives a pressure and no bending action, the upper limiting surface 32 of the seal is almost watertight.

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10 ret.

For the production of the sealing plant 14, a post-chlorinated polyethylene (CPE) is used, and more specifically with a chlorine content of 30 to 42%. This material alone has a shore-5 A hardness of approx. 55 (DIN 53505, 10s).

The CPE material is mixed to obtain a satisfactory resilience elasticity with nitrile rubber NBR with a ratio of butadiene to acrylonitrile between 55 to 45 and 82 to 18 (preferably 67 to 33). Since a sufficient increase in shore hardness is not obtained by adding a nitrile rubber, the mixture is further added polyvinyl chloride with a K value of 58 to 78 (preferably 70) with a plasticizer uptake of at least 30% (DIN 53417, first part ).

The mixture thus obtained is added to usual PVC stabilizers and preferably also contains a filler, such as chalk, and corresponding pigments for the desired color setting.

As additives, 0 to 0.5 parts of azodicarbonamide, 0 to 20 parts of calcium carbonate, uncoated, 1.5 to 2.5 parts of barium-cadmium laurate and / or barium-cadmium stearate and / or barium- cadmium myristinate, 0.4 to 0.6 parts of organic phosphite as co-stabilizer for the above-mentioned barium compounds, with a refractive index nD = 1.515 to 1.525 and 1 to 2 parts of epoxidized soybean oil.

For black colors, add 0.5 to 1.5 parts flame soot or gas soot, while for a white color, add 4 to 8 parts titanium dioxide of the rutile type. These materials are fed into a coextrusion tool together with a hard PVC compound, which contains CPE as a component (Schlagzah component). The cow extrudate was calibrated and given the design shown in the drawing.

The material of the sealing plant had the following mechanical values:

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Shore A 70 to 72 DIN 53505

Tensile strength 13 N / mm ^ DIN 53455

Elongation at break 1000% DIN 53455

Pressed f orraations re st

c 22h / 70 ° C

5 25% deformation 65% DIN 53517

The tear-off strength of the coextruded sealing system on the retaining strip is more than 70 N / m.

The arrangement according to the invention is described in connection with a door or window frame, but can also be used in other contexts, for example in room dividers which, as door leaf frames, are built up of plastic hollow profile bars and a filling.

Finally, in order to obtain a better understanding of the invention, it may be mentioned that the compression of the seal 15 during assembly of the double glazing 4 constitutes approx. eight to twelve times the compression of the sealing plant 21.

20 25 30 35

Claims (8)

Frame part (1) with inserted filling (4) for a window or door frame and consisting of hollow profile bars (1) connected at the corners, on the outside of which a rib (7) is preferably placed and on the inside of which later can be inserted a plastic holding strip (11), made in particular of impact-resistant hard PVC, for holding the filling (4), e.g. a glass pane, in which both the rib (7) and the holding strip (11) are provided with a resilient seal (14, 15) which rests against the filling (4) under prestress, and where the seal (14) on the holding strip (11) is coextruded therewith, while the seal (15) on the rib (7) is inserted into a corresponding groove (8) and has a cross-section which results in greater elasticity, being substantially influenced to bend, characterized in that the seal on the holding strip (11) is designed as an abutment surface (14) provided on the surface facing the filling (4), which is substantially influenced under pressure and which shows little elasticity, that the seal (7) pressed into the rib (7) 15) is designed as a hollow profile hose (15) consisting of synthetic rubber with high elastic resilience, preferably EPDM, 25 and that the sealing surface (14) coextruded with the holding strip (11) consists of the following materials: a) 40 to 60 parts, preferably 50 parts, chlorinated polyethylene with a chlorine content of 30 - 42%, preferably 36%, 30 b) 20 to 60 parts of polyvinyl chloride with a k-value of 58 -78, preferably 70, and an uptake of plasticizer of at least 30% (according to DIN 53417, 1st part), and c) 20 30 parts of nitrile rubber NBR with a ratio of butadiene to acrylonitrile of between 55 to 45 and 82 to 18, 35 preferably 67 to 33. Frame part according to Claim 1, characterized in that the sealing system (14) on the holding strip (11) is flat and on its surface (22) facing the filling (4) is provided with at least one, preferably two solid, longitudinal fullest (19,20,23,24,30,31). Frame part according to claim 2, characterized in that the longitudinal beads have a roof-shaped or saw-roof-shaped profile, the edge facing the filling (4) is preferably rounded and whose flanks enclose an angle which is not less than approx. 60 *. Frame part according to Claim 2, characterized in that the bead profile (30) is rounded. Frame part according to one of Claims 1 to 4, characterized in that a lip (22) abutting the filling strip (4) facing away from the associated frame rod is formed. Frame part according to any one of claims 1-5, characterized in that at the side of the hollow profile hose opposite the associated frame rod (1) there is at least one sealing lip (18) abutting the filling (4). Frame part according to any one of claims 1-6, characterized in that the seal (14) co-extruded with the holding strip (11) contains at least one of the following additive components: d) 0 to 0.5 parts of azodicarbonamide, 25 e ) 0 to 20 parts of calcium carbonate, uncoated, f) 1.5 to 2.5 parts of barium cadmium laurate and / or barium cadmium stearate and / or barium cadmium myristinate, g) 0.4 to 0 , 6 parts organic phosphite in the form of co-stabilizer to f), with a refractive index nD + 1,515 to 30 1,525, and h) 1 to 2 parts epoxidized soybean oil, and i) for blackening 0.5 to 1.5 parts flame soot or glass soot, respectively j) for whitening 4 to 8 parts titanium dioxide of rough-35 type. Frame part according to any one of claims 1-7, characterized in that the hollow profile hose (15) contains an inner cross strip (17).