DE20105875U1 - Window / door profile made of polyurethane (PUR) with internal metal reinforcement - Google Patents

Description

Joachim Kleiß, Albrecht-Dürer-Str. 25,97337'Dettelbadh-■ 20.032001

Utility model application ^x

Description

Title: Window/door profile made of polyurethane (PUR) with internal metal reinforcement.

In construction, window and door profiles made of wood, thermoplastics, extruded aluminum and foamed PUR integral rigid foam with a metal core are commonly used. For the latter PUR profiles, the state of the art is described in the patents

No. 3408975 Method and device for producing a profile part and _&Lgr;

No. 3408995 Corner connection for profile parts. . . X

The profiles and windows are particularly characterized by high stability, good thermal insulation and durability in all colors. " ■ , ' .; . .

The thermal insulation of the profiles is, however, limited; it depends essentially on the thickness of the PTJR layer in the metal profile around it. The core profile, generally aluminum, does not contribute to thermal insulation due to its good thermal conductivity. For example, a 58 mm _thick PUR profile (& Figure No. 1) with an 8 mm thick foam layer on the outside and inside had a cross-section with a temperature profile according to Figure No. 2. The practically ;

horizontal course in the area of the core profile, &khgr;&igr;''■'■.;'-■:-:'■■ : _; > - '. \ &ngr;<&idiagr;-'/&khgr; This results in a thermal insulation value of K= 1.8 to 2.0 W/m2K. ''■■."■ . \ ■ '■■■'■- '''■,;.'.'..■ \

The window profiles are usually combined with insulating glass panes, ^the thermal insulation value of which has been greatly improved by the standard introduction of metal vapor deposition; K values of 1^1 to 1.8 W/m2K are common today. With modern three-pane insulating glass, K values of well under 1.0 _: W/m2K are also possible. ,X^ ■;· &khgr;: &khgr; ^: . : / X i ^-; ^v ";${''v'-.'.r

In order to save energy and to improve the temperature control on the window component , better thermal insulation of the frame profile is therefore to be sought. This is not possible with profiles of the type described above, or only by significantly strengthening the PUR layer and thus increasing the cost and thickness of the profile. j · ^ : . ^

According to the invention, the problem is solved by dividing the previously single-storey metal core into two separate shells, which are laid as far apart as possible from each other to achieve high rigidity, i.e. close to the outer and inner profile edges (see attached picture no. 3). In this way, in addition to the PUR edge layers on the outside and inside, the foam area between the shells is also included for thermal insulation and a much more favourable temperature profile is achieved across the cross-section (see picture no. 4). A window profile consisting of a sash and frame profile with this structure now results in a K value of approx. 12 W/m2K. This thermal insulation value is in the range of today's standard insulating glass and creates the optimum to be strived for in terms of building physics with the same insulation values for the frame and glass.

The metal shells used are designed as hollow profiles, so that they also allow the use of corner angles with the same assembly technology. The production of the profiles in foaming tools is the same as described at the beginning; no further equipment is required apart from the pressing tools for the new shells. During production it is important that the shells are in exactly the desired positions. Otherwise the assembly of the corner angles will be difficult and a mitre offset may occur at the corners. The correct position of the shells is ensured by the use of spacers, which connect the two shells at certain points via a snap connection on the webs. The two shells are inserted into the foaming mold (as one profile) and held in the correct position by stops.

XJX\S &Pgr;&Igr;ViUII'linim&igr;&igr;&igr; _

and by elastic snapping over the webs of the

, plastic, so that they do not form a thermal bridge &mdash; the shells create a solid connection (see

Picture no. 5). ■.:':·■.·.■■;■

Instead of hollow chambers, the separate webs can also be provided with single-layer screw channels. This allows the distance between the layers and thus the thermal insulation value to be further increased/improved. In this case, the corner connection of the profiles at the mitres is made using screws that are screwed into the screw channels.

Claims (1)

Window/door profile made of polyurethane (PUR) with internal metal reinforcement, characterized in that - the load-bearing core profile made of extruded aluminium consists of at least two spatially separated webs - the webs are as far apart as possible to achieve good thermal insulation and high profile stability, - the core profiles are made of extruded aluminium with external serrations or angular undercuts - the webs are hollow profiles made of aluminium and are suitable for accommodating corner angles at the mitres, - the webs are designed as profiled flat material (without chambers) with serrations or angular undercuts and with screw channels for the mitre connection, - the core profiles are made of glass fibre fabric.