Abstract:
A plastic profile for window, door and facade elements includes a plastic profile body, which extends in a longitudinal direction (z), and at least one outer side, which is located outside in a transverse direction (x) perpendicular to the longitudinal direction (z) as viewed in a cross-section (x-y) perpendicular to the longitudinal direction (z). The outer side includes two roll-in protrusions configured such that a reinforcement element is connectable with the plastic profile body by a rolled-in connection. The reinforcement element has at least one of a hollow profile, a partially-open profile and a receptacle portion configured to accommodate a corner connector, wherein at least one of the hollow profile, the partially-open profile and the receptacle portion is disposed between the roll-in protrusions in the rolled-in state.

Description:
CROSS-REFERENCE 
     This application is the U.S. national stage filing of International Application No. PCT/EP2007/011025 filed Dec. 14, 2007, which claims priority to German patent application no. 10 2006 061 035.0 filed Dec. 22, 2006. 
     TECHNICAL FIELD 
     The present invention relates to a plastic profile for window-, door- and facade-elements. 
     RELATED ART 
     Window systems generally are comprised of a wing profile and a frame profile, wherein the wing is glazed and the frame is connected with the building-shell (brickwork). These profiles are, for example, made of wood, steel, aluminum, plastic or combinations of these materials. The diversity of the competing materials is partly based on tradition; however, the factors thermal properties, wind-resistance, maintenance and maintenance costs, aesthetic impression and price are also important for the selection of the material. 
     Extruded plastic hollow profiles for windows and doors are known in the prior art (e.g., DE 33 19 144A1), in which the hollow profile part has a plurality of hollow chambers that extend along the hollow profile member. Such hollow profile parts are usually made of rigid PVC. One or more of the internal chambers can be filled with foamed plastic (see also EP 1 154 115 B1). The corner connection of window frames made of such hollow profiles is manufactured by welding or by the use of corner connectors, which are adhered in place. 
     Window systems (e.g. under the designation Corona CT 70 Plus) having foam-free plastic hollow profiles with a plurality of hollow chambers and conventional steel reinforcement are offered by the window manufacturer Schüco of Bielefeld, Germany, wherein steel-reinforced profiles are inserted into hollow chambers. The steel-reinforced profiles are also used for anchoring of fittings. In these window-systems, the attachment of decorative external covers made of aluminum is possible. 
     Profile members made of plastic-foam for window elements are known from DE 201 05 876 U1, DE 32 42 909 A1 and WO 97/22779 A1, respectively, in which insulating frames (DE 201 05 876 U1) or profile parts made of metal (DE 32 42 909 A1) or also profile parts made of wood or plastics (WO 97/22779 A1) are connected with the core made of plastic foam in different ways. In the PU-foam core known from DE 201 05 876 U1, separate core-profiles are provided in the PU-profile. 
     A plastic profile component for window and door elements is known from EP 1 705 334 A2, wherein metal profile parts are adhered to, or also rolled into, both outer sides of the plastic profile part, which outer sides form the interior and exterior sides of the window and door element. 
     Furthermore, aluminum window, door and facade elements, which are comprised of weather-side and interior-side aluminum profiles made of aluminum-plastic-composite profiles, are known, which aluminum profiles are friction-fit/form-fit connected to plastic profiles. In the manufacturing of the components, the profiles are assembled into frames, wherein the corners are mechanically connected via inserted corner connectors. Moreover, composite window, door and facade elements, which are comprised of weather-side and interior-side profiles made of composite profiles using freely-selectable materials, are known, which are friction-fit/form-fit connected to plastic profiles (EP 1 555 376 A1). DE 200 16 611 U1 discloses a reinforced plastic window profile for windows, etc., wherein a U-shaped groove for accommodating fittings, etc. is provided; a reinforcement profile is affixed in the groove. 
     SUMMARY 
     It is an object of the invention to provide an improved plastic profile for window, door and facade elements and a reinforced plastic profile having such a plastic profile for window, door and facade elements. 
     A profile system for windows, doors and facades is enabled by the invention, wherein hollow profiles made of plastic and having rolled-in reinforcements are utilized, which reinforcements are installed in a positionally-precise and longitudinally-fixed manner and which make possible an insulating zone that is a comparatively large proportion of the total constructional depth. 
     One embodiment of an inventive profile system for windows, doors and facades comprises plastic profiles, preferably made of plastic hollow profiles, and outwardly-disposed reinforcement profiles, preferably made of aluminum, which have an accommodation chamber for corner connection elements precisely positioned relative to the outer surface and which are connected in a longitudinally-fixed manner with the plastic hollow-profile using a roll-in process. 
     The plastic profile forms an insulating zone and the proportion of the insulating zone relative to the total constructional depth from the interior side to the weather side preferably is 80% or more, even more preferably 90% or more, or even more preferably, 95% or more. 
     The profiles can be connected, in a manner analogous to aluminum windows, via corner connectors to components such as window, door and facade elements. 
     A manufacturing method is used for the manufacture of the plastic profiles made of, e.g., rigid-PVC, PA, PET, PBT, PA/PPE, ASA (reinforced or not reinforced) or others, which calibrates the external contour as well as the internal contour in a positionally-precise manner. 
     A precision can be ensured by the positionally-precise calibration, with which inserted and affixed reinforcements are positioned relative to the external contour with the required low tolerances. 
     The invention offers several advantages for designing the properties of window, doors and facade elements, in which the reinforced plastic profile is utilized. 
     a) Thermal Properties 
     The thermal rating can be determined by the increased proportion of the plastic hollow profiles in the constructional depth and by the configuration, size and partitioning of the interior hollow spaces, as well as the foam filling thereof. 
     b) Mechanical Properties 
     The mechanical properties, such as torsional resistance, etc., can be determined by the constructional depth (i.e. the distance between the weather-side and the interior-side reinforcements) and by the configuration, size and cross-sectional area of the reinforcements. 
     c) Cross-Section 
     In the cross-section of the profiles, undercuts and geometries of arbitrary complexity for accommodating fitting and locking elements, seals, etc., are made possible by the use of the plastic hollow profiles. 
     d) Surface and Coloration 
     The surface and coloration may also be varied in many ways for the differing designs of the weather side and the interior side by the choice and pigmentation of the plastics and/or through the use of decorative elements. 
     The external contour of the hollow profile is determined by the required functions, such as e.g.: 
     a) sealing receptacle, sealing stop, fitting receptacle in the closing plane; 
     b) block surfaces, functional grooves for the glass guide rail, glass seal receptacle, and drainage for the glazing, 
     c) grooves, window sill stop, receptacle for sealing films, etc., for the building shell (brickwork), and 
     d) glossy, colored and weather-proof surfaces of the hollow profile and/or latches for the attachment of decorative profiles made of plastic, wood, aluminum or stainless steel (extruded or rolled) for the external and interior sides. 
     The reinforcement preferably comprises extruded aluminum hollow profiles having an interior contour for the accommodation of corner connectors (as is usual for aluminum windows) and an external contour having positioning surfaces for the precise fixing of the position in the plastic hollow profile. 
     The reinforcements can have additional functions such as are required for the threaded connection of T-joints or fittings. 
     The plastic hollow profiles are preferably comprised of reinforced materials, e.g. PA 66 GF, and include functional elements on the external contour, e.g. for the accommodation of fitting and locking elements, seals, glass guide rails, accommodation of decorative covers and the like. 
     The plastic hollow-profiles for windows, doors and facades achieve a satisfactory static bearing capacity due to the reinforcement profiles, which are connected in a longitudinally-fixed manner and are preferably formed of aluminum. The reinforcement profiles preferably include a portion that is suitable for the accommodation of corner connectors. Preferably, functional portions for the accommodation of fitting and locking elements, seals, glass guide rails can be integrated into the plastic hollow profile. The reinforcement profiles preferably can be covered with decorative covers. The plastic hollow profiles fulfill application-specific mechanical requirements by selecting a suitable plastic material, e.g. PA 66 GF. 
     The reinforcement-profiles can be prepared in a suitable manner for the longitudinally-fixed connection with the plastic profile, e.g. by knurling. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
       Further features and utilities will be derived from the description of embodiments with the assistance of the figures. In the figures: 
         FIG. 1  shows a cross-sectional view perpendicular to the longitudinal direction of a reinforced plastic profile according to a first embodiment of the invention; 
         FIG. 2  shows a cross-sectional view perpendicular to the longitudinal direction of a plastic profile according to a second embodiment of the invention; 
         FIG. 3  shows a cross-sectional view perpendicular to the longitudinal direction of a plastic profile according to a third embodiment of the invention; 
         FIG. 4  shows a cross-sectional view perpendicular to the longitudinal direction of a reinforced plastic profile according to a fourth embodiment of the invention; 
         FIG. 5  shows a cross-sectional view perpendicular to the longitudinal direction of a reinforced plastic profile according to a fifth embodiment of the invention; and 
         FIG. 6  shows an enlarged view of a portion of the first embodiment from  FIG. 1 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     A first embodiment of the invention will be described with reference to  FIG. 1  and  FIG. 6 .  FIG. 1  shows profile parts as components of a frame profile and of a window wing profile in the cross-section (x-y plane) perpendicular to the longitudinal direction (z) of the respective profile members. 
     On the right-hand side of  FIG. 1 , a plastic hollow profile  111  is shown in the cross-section perpendicular to its longitudinal direction, which profile  111  forms a part of a window wing. A double-glass window pane  200  can be retained at/in the frame of the window wing in a known manner via sealing/attachment elements  201 , which may also formed in a different shape, and a glass guide rail  202 . The top side in  FIG. 1  is the interior side and the bottom side in  FIG. 1  is the weather side of the profile members. 
     The plastic hollow profile  111 , which forms a part of a window wing, extends in a transverse direction x perpendicular to the longitudinal direction z and perpendicular to a width direction y, which in turn is perpendicular to the longitudinal direction z, from the weather side (bottom side in  FIG. 1 ) to the interior side (top side in  FIG. 1 ). An aluminum hollow profile  21  is affixed to the plastic hollow profile  111  on an external side (weather side) in a manner described below. On the opposite side in transverse direction x, i.e. on the interior side (top side in  FIG. 1 ), an aluminum hollow profile  22  is affixed in a similar manner. A hollow chamber is located between the two outer sides, which in the first embodiment is foam-filled with a foam  50  having a low density. In the cross-section (x-y) perpendicular to its longitudinal direction z, the plastic hollow profile has a complex geometry with undercuts, protrusions and the like for the accommodation of fitting and locking elements (not shown), seals  201 ,  211 ,  212 , reinforcement rails  23  and other elements such as the window rail  202  and/or for the mounting of decorative elements  61 . 
     The attachment of the aluminum hollow profiles  21 ,  22  will now be described with reference to  FIG. 6  in an exemplary manner for the aluminum hollow profile  21 . As can be clearly seen in  FIG. 6 , the plastic hollow profile  111  includes roll-in protrusions, such as the roll-in protrusions  121   a , at the respective outer side (in this case the weather side), which protrude from the plastic hollow profile  111  in the transverse direction x and thus form the farthest protruding sections/parts of the plastic hollow profile  111  on this outer side. 
     The aluminum profile  21  extends in the longitudinal direction z and has a hollow chamber  21   a  surrounded by an outer wall having a rectangular shape in cross-section. The hollow chamber may, of course, also have other cross-sectional shapes, but a rectangular cross-section, the longer side of which extends in the width direction y, is preferred. Protrusions  21   b  extend from the rectangular wall in width direction y; the ends of these protrusions are formed as bendable hammers (roll-in hammers)  21   ba  for rolling-in and form the groove together with another part of the aluminum hollow profile (in this case, the wall of the hollow chamber). 
     As can be clearly seen in  FIG. 6 , the roll-in protrusions  121   a  of the plastic hollow profile  111  are formed in a suitable bent shape such that the tips, as the heads (roll-in heads)  121   aa  of the roll-in protrusions  121   a , cooperate with the hammers  21   ba  of the protrusions  21   b  of the aluminum hollow profile  21  to retain the aluminum profile  21  in a longitudinally-fixed manner, and such that the aluminum profile  21  comes into contact with the plastic hollow profile  111  only at the heads  121   aa . The aluminum profile  21  is accommodated in a receptacle (recess)  121  such that it is surrounded by an air cushion and does not otherwise come into contact with the plastic hollow profile  111 . This means that the length of the protrusions  121   a , i.e., the extension of the protrusion relative to the wall  121   b , which bounds the receptacle  121 , is determined such that the depth of the aluminum profile  21  is less than the length of the protrusions  121   a  in the transverse direction x. 
     The above explanations for the configuration of the roll-in protrusions and of the aluminum hollow profiles apply to all embodiments. 
     The wall  121   b  is, in principle, not required for the inside boundary of the receptacle  121 , as will be explained further below with reference to  FIGS. 4 and 5 . However, an inside boundary of the receptacle  121  is provided and preferred in the present first embodiment. 
     As shown in  FIG. 1 , the aluminum hollow profile  22  is affixed to roll-in protrusions  122   a ,  122   c  on the opposite outer side (interior side) of the plastic hollow profile  111  in a longitudinally-fixed manner by rolling-in in a similar way. Here, the roll-in protrusions  122   a ,  122   c  are not formed with the same length, which is different than the case of the weather side. However, the roll-in protrusions  122   a  and  122   c  are also the sections/parts of the plastic hollow profile  111  that project the farthest in the transverse direction x on the interior side. 
     The aluminum hollow profile  22  has a hollow chamber  22   a , which is surrounded by a wall having a rectangular cross-section, and protrusions  22   b ,  22   c  extending in the width direction y. Unlike in the aluminum hollow profile  21 , these protrusions are adapted to realize further functions. For example, the protrusion  22   b  includes another protrusion  22   bb , in addition to the hammer  22   ba  for rolling-in, which protrusion  22   bb  serves to click-attach a decorative element  62 . The protrusion  22   c  includes the hammer  22   ca  for rolling-in and an extension  22   cb , on which a receptacle  22   cc  for the seal  211  and a protrusion  22   cd  for the click-attachment of the decorative element  62  are provided. 
     In principle, the aluminum hollow profiles  21 ,  22  serve as reinforcement elements that are connected to the plastic hollow profile  111  in a longitudinally-fixed manner by rolling-in. In this way, the mechanical properties of a reinforced plastic hollow profile, which is comprised of the plastic hollow profile  111  and the aluminum hollow profiles  21 ,  22 , are achieved. 
     By constructing a plastic hollow profile  111  such that the roll-in protrusions  121   a ,  122   a ,  122   c  are the farthest protruding sections/parts of the plastic hollow-profile  111  in the transverse direction x, and by disposing the substantial part of the aluminum hollow profile substantially between the roll-in protrusions, or expressed more generally, within the plastic hollow profile, a maximum enlargement of the insulating zone formed from plastic is achieved relative to the total constructional depth in transverse direction x. Different from known composite profiles, the enlargement of the cross-section of the aluminum hollow-profile in transverse direction x is not added to the size of the insulating zone, but rather in the present case the largest part of the enlargement of the cross-section of the aluminum hollow profile in the transverse direction x is within the enlargement of the insulating zone in the transverse direction x, without reducing the enlargement of insulating zone x. 
     As a result thereof, the proportion of the insulating zone relative to the total constructional depth in the transverse direction x of at least 80%, in the present case (without decorative covers) of even 92% in the case of the plastic hollow profile  111  reinforced with aluminum hollow profiles  21 ,  22 , is achieved. By appropriately modifying the protrusion  22   c  and extending the roll-in protrusion  122   c  to the length of roll-in protrusion  122   a , even 96% is possible. 
     The decorative elements  61 ,  62  can, for example, be formed as aluminum covers that can be clipped onto the profile. Other materials such as stainless steel, wood, plastic, etc. can also be used for the decorative elements  61 ,  62 . It should be considered that the use of a material for the decorative covers that conducts heat very well, especially when the decorative covers extend further in transverse direction x to the inner side of the plastic hollow profile  111 , like the decorative cover  61  (in contrast to decorative cover  62 ), causes a deterioration of the insulating properties, which is, however, much smaller than the improvement achieved through the described connection of the aluminum hollow profiles with the plastic hollow profile. Moreover, these decorative elements can be formed very thin-walled, so that further optimizations are possible here, too. 
     As was already described above, the plastic hollow profile  111  has a complex geometry. The plastic hollow profile  111 , for example, has an undercut recess  131  that is adapted for the accommodation of fittings and locking elements. In the subsequent description, reference to  FIG. 2  is made, the plastic hollow profile  111  of which is identical with the plastic hollow profile  111  of the first embodiment. The recess  131  extends in the longitudinal direction z. In the width direction y, the outer wall of the plastic hollow profile  111  forms the back wall of the undercut recess  131 . In transverse direction x, the recess  131  is bounded on the interior side by a hook-shaped protrusion  131   a . In the transverse direction x, on the weather side, the outer wall of the plastic hollow profile  111  extends at a right angle from the part that forms the back wall and includes a protrusion  131   b  protruding towards the interior side, so that the undercut recess  131  is bounded as a whole. 
     Another undercut recess  132  is formed on the inner side of the back wall of the undercut recess  131 . The undercut recess  132  is bounded by the same part of the outer wall of the plastic hollow profile  111  as the back wall in the width direction y. In the transverse direction x, on the weather side, the recess  132  is bounded by a hook-shaped protrusion  132   b  and on the interior side by the outer wall of the plastic hollow profile  111  and by a protrusion  132   a  protruding at a right angle from this outer wall towards the weather side. 
     The recess  132  forms a receptacle for a reinforcement element (reinforcement bar)  23 , whose function is the secure attachment of the fitting and locking elements, which are received in the undercut recess  131  on the outer side. The reinforcement element  23  is held in its position by the foam  50  or in another way (e.g. screws). 
     The plastic hollow profile  111  of the first embodiment has a hollow chamber that is continuous from the interior side to the weather side. This hollow chamber is foam-filled with the foam  50  for reasons of heat insulation and strength enhancement. Depending on the requirements, the plastic hollow profile can have one or more hollow chambers that are foam-filled entirely, partially or not at all. The density of the foam that is used can be varied depending on the requirements. 
     On the left hand side of  FIG. 1 , a plastic hollow profile  112  is shown that is a part of a frame profile. Aluminum hollow profiles  24 ,  25  are connected in a longitudinally-fixed manner to the plastic hollow profile  112  via roll-in protrusions  124   a ,  125   a  by rolling-in in the same manner as in the plastic hollow profile  111 . The plastic hollow profile  112  also has a hollow chamber that is continuous from the weather side to the interior side, which hollow chamber is foam-filled with a foam  50 . In a comparable manner, the aluminum profiles  24 ,  25  have hollow chambers  24   a ,  25   a  surrounded by outer walls that are rectangular in cross-section. In the hollow profile  112  too, the roll-in protrusions  124   a  together with a corresponding outer wall  124   b  of the plastic hollow profile  112  form a receptacle  124 , into which the hollow chamber  24   a  of the aluminum hollow profile is inserted. The aluminum hollow profile  24  is again in contact only with the heads  124   aa  of the roll-in protrusions  124   a  of the plastic hollow profile  112  and is otherwise surrounded by an insulating air layer. The same can be said about the longitudinally-fixed attachment of the aluminum hollow profile  25  by rolling-in, wherein the receptacle  125  is bounded by the roll-in protrusions  125   a  and the outer wall  125   b . The plastic hollow profile  112  reinforced with the aluminum profile  25  has an undercut recess  133  for accommodation of locking and fitting elements. Different from the undercut recess  131  of the plastic hollow profile  111 , this recess is not exclusively formed by the plastic hollow profile, but rather by the combination of the plastic hollow profile  112  with the aluminum hollow profile  25 . This means the undercut recess is partly formed by components (outer wall, protrusions)  133   b ,  133   a  of the plastic hollow profile and partly by components (protrusion  25   b ) of the aluminum hollow profile  25 . In the embodiment shown in  FIG. 1 , no reinforcement element for the secure attachment of the fitting and locking elements is provided. It can, however, be made in various ways, as is described with reference to  FIGS. 2 and 3 . 
     As can be derived from the description of the first embodiment, the plastic hollow profile makes possible a significant increase of the proportion of the insulating zone out of the total construction depth for comparable constructional depths. This is made possible, for example, by the fact that the roll-in protrusions on the respective outer side are the farthest protruding sections/parts of the plastic hollow profile. 
     If the reinforcement element is formed with a hollow profile, the hollow profile is to be arranged in a way that it is located substantially (at least more than 50%) within the constructional depth in the transverse direction x, preferably to the largest extent, i.e. 80% or more, more preferably 90% or more, even more preferably completely except for the outer wall, relative to the protruding of the roll-in protrusions, preferably between the roll-in protrusions. 
     The reinforcement elements and the hollow chambers  21   a ,  22   a ,  24   a ,  25   a , respectively, of the aluminum hollow profiles can preferably be used as the receptacle portion for accommodating a corner connector. 
     The aluminum hollow profiles are preferably manufactured by aluminum extrusion, so that the cross-section of the aluminum hollow profiles is identical over the entire length in the longitudinal direction. In this case, the hollow profile and thus also the receptacle portion for the accommodation of a corner connector, is located between the roll-in protrusions in the above described manner. 
     The reinforcement elements can also be formed as partially-open profiles. In this context, partially-open profile means a profile that has a cross-sectional shape (e.g. a U-shape or the like) in its cross-section (x-y) perpendicular to its longitudinal direction z, which partially, but not entirely, surrounds a space. A further example of a partially-open profile is a rectangular profile that is not completely closed on one side of the rectangle, and the like. 
     The plastic hollow profiles  111 ,  112  possess a positionally-precise calibration of the roll-in protrusions relative to the outer geometry of the plastic hollow profiles, so that the aluminum hollow profiles and the receptacle portions for the corner connectors, respectively, can be positioned by means of the longitudinally-fixed rolling-in in a positionally-precise manner relative to the outer geometry. Consequently, a positionally-precise connection of the reinforced plastic hollow profiles via corner connectors or via other corner connections, such as e.g., welding, is possible and the time and effort of the post-processing work of such corner connections is minimized. 
     In the following, a method for manufacturing the plastic hollow profiles shown in  FIG. 1  and  FIG. 6  will be described. Methods and devices for manufacturing a hollow chamber profile, with which individual components or the entire hollow chamber profile can be calibrated in a positionally-precise manner, are described in the WO 96/30188 A1 and the DE 199 21 458 A1 respectively. The plastic hollow profiles  111 ,  112  of the first embodiment are manufactured using suitable methods, wherein materials are chosen that are color-, light- and/or weather-proof, depending on the requirements. In this manufacturing, the profiles are extruded and preferably at least the outer surfaces and the roll-in protrusions are calibrated in a positionally-precise manner. Suitable materials are rigid-PVC, PA, PET, PPT, PA/PPE, ASA, PA66 and others (each with or without reinforcement materials). 
     The reinforcement parts are preferably manufactured by aluminum extrusion. The protrusions of the reinforcement parts, which have to be rolled-in, are preferably prepared by knurling. 
     Thermosetting plastics, such as PU, having an appropriate density can be used as foams for foam-filling the plastic hollow profiles. Preferably, foams having a low density (0.01 to 0.3 kg/l) are used. If foam having a high density is to be used, foams with 0.3 to 0.6 kg/l are preferably used. 
     With the above described embodiment, arbitrary undercuts are possible at arbitrary locations of the profile. The surface treatment of outer and inner covers made of aluminum or other materials can be carried out independent of a foaming process, which is advantageous, in case the foam does not tolerate annealing temperatures. In addition to this advantage, the described embodiment provides a system with excellent mechanical properties, wherein the reinforcement profiles can be used for the corner connection using corner connectors and, at the same time, the necessary post-processing work is minimized. The embodiment also enables the use of foams of different density and the resulting optimization of heat conducting properties. 
     The described embodiment enables proportions of the insulating zone formed from plastic of 95% or more, in any case of 80% or more of the total construction depth, with excellent mechanical properties that are achieved due to the longitudinally-fixed rolling-in of the aluminum hollow profiles. 
     A second embodiment is described with reference to  FIG. 2 . In the second embodiment, the window wing profile is identical to the window wing profile of the first embodiment and therefore the description is not repeated. 
     The frame profile includes a plastic hollow profile  113  whose design corresponds to the plastic hollow profile  112  of the first embodiment, except for the formation of the recess  125  and the recess  134 ; a reinforcement element  27  is inserted in the recess  134 . 
     As can be clearly seen in  FIG. 2 , the outer wall  125   b  does not extend to the outer wall  133   b , but rather transitions into the wall  125   c  shortly before the outer wall  133   b ; the wall  125   c  forms an outer wall for bounding the receptacle  125 . In this way, the undercut recess  134  is formed, which is located at the inner side of the outer wall  133   b  opposite to the undercut recess  133 . A reinforcement element  27  is inserted into this undercut recess  134 , which reinforcement element  27  serves to securely attach fitting and locking elements that are guided in the undercut recess  133 , analogous to the reinforcement  23 . 
     The remaining design of the plastic hollow profile  113  corresponds to the design of the plastic hollow profile  112  of the first embodiment, and therefore, the description is not repeated. 
     A third embodiment is described with reference to  FIG. 3 . The window wing profile of the third embodiment corresponds to the window wing profile of the first and second embodiments, and therefore, the description is not repeated here. 
     The frame profile of the third embodiment differs from the frame profiles of the first and second embodiments in the formation of the receptacle  126  and of the aluminum hollow profile  26 . 
     As can be clearly seen in  FIG. 3 , the aluminum hollow profile  26  is rolled-in at the interior side of the frame profile in a known manner. The shape of the aluminum hollow profile  26  corresponds to the shape of the aluminum hollow profile  25 , except for the protrusion  26   c  that protrudes on the interior side of the aluminum hollow profile  26  in the width direction y and that forms a reinforcement element that extends in the transverse direction x and the longitudinal direction z. A receptacle  126  is bounded by roll-in protrusions  126   a , the tips  126   aa  of which serve as roll-in protrusions for the protrusions  26   ba  of the aluminum profile  26 . For accommodating the reinforcement element  26   c , the receptacle  126  is provided with a recess extending in the transverse direction x and the longitudinal direction z, which is bounded by a wall  126   c , so that the reinforcement element  26   c  extends, like the reinforcement element  27 , on the inner side of the outer wall  133   b  opposed to the undercut recess  133 . Therefore, the reinforcement element  26   c  can fulfil essentially the same function as the reinforcement element  27 . 
     A fourth embodiment is described with reference to  FIG. 4 . 
     The fourth embodiment differs from the second embodiment in that the integral plastic hollow profiles  111  and  113  are replaced by multi-part plastic hollow profiles  115  and  116 . The remaining design corresponds to the design of the second embodiment. Unlike the plastic hollow profile  111 , the plastic hollow profile  115  of the window wing profile is not integrally formed, but rather is formed of a plurality of parts. The outer walls  115   a  are connected via an inner element  115   b  that forms inner bars (e.g. via not-illustrated plug-in, clip-on or other connections). The use of the inner bars  115   b  increases the mechanical rigidity and results in the formation of a plurality of hollow chambers. These hollow chambers can optionally be entirely or partially foam-filled. 
     The plastic hollow profile  116 , which replaces the plastic hollow profile  113  of the second embodiment, is formed in a similar way. This means the outer walls  116   a  are connected via an inner part  116   b  that forms inner bars, wherein a plurality of hollow chambers is formed. 
     A fifth embodiment will be described with reference to  FIG. 5 . 
     The fifth embodiment differs from the third embodiment in the design of the plastic hollow profiles  115  and  117 . The window wing profile of the fifth embodiment corresponds to the window wing profile of the fourth embodiment, and therefore, the description is not repeated here. 
     As compared to the frame profile of the fourth embodiment, the frame profile of the fifth embodiment has an aluminum hollow profile  26  instead of the aluminum profile  25  that is provided in the third embodiment. The plastic hollow profile  117  of the fifth embodiment merely differs from the plastic hollow profile  116  of the fourth embodiment in that no undercut recess for the accommodation of the reinforcement element  27  is formed. Instead, the reinforcement element  26   c , which is an integral component of the aluminum hollow profile  26 , is located on the inner side of the outer wall  133   b  that forms the back wall of the undercut recess  133 . 
     The remaining design of the fifth embodiment corresponds to the design of the fourth embodiment and is therefore omitted. 
     The manufacturing method described for the first embodiment and the properties and advantages described for the first embodiment are also applicable or are maintained in the second to fifth embodiments. The features of the first to fifth embodiments can be freely combined according to the requirements. 
     It is explicitly stated that all features disclosed in the description and/or the claims, should be regarded as separate and independent of each other for the purpose of original disclosure as well as for the purpose of restricting the claimed invention, independent of the combination of features in the embodiments and/or the claims. It is explicitly stated that all indications of ranges or of groups of units disclose every possible intermediate value or sub-group of units for the purpose of original disclosure as well as for the purpose of restricting the claimed invention, especially also as a limit of a range indication.