| 摘要 |
The external layer of compound frames for windows and doors serves to protect fixed frames, as well as movable and fixed frames of wings against thermal, light and weather influences. The external layer of the fixed frame, shown in Figure 1, consists of insulation layer (2), of uniform density, the external surface of which is covered by vertical aluminum cover (3), which is by plastic profile (8) and plastic bond elements (14) connected to carrier part (1) of the fixed frame by means of snap joints. In the upper part of aluminum cover (3) an air space is made which serves to collect and drain condensed water through openings (7) made on aluminum cover (3). The external layer of the movable frame of wing consists of an insulation layer, which is fastened to the external surface of carrier part (17) of the movable frame of wing by means of adhesive, and aluminum cover (19). The insulation layer consists of surface layer (18a) of a higher density, and internal part (18b) of a lower density, the external parts of which are covered by aluminum cover (19), which is fastened by means of permanently resilient adhesive. Thermo- insulation and mechanical properties of frames with the described external layers are significantly improved in comparison to those of the already known frames for windows and doors. |
