There are many kinds of door and window hardware that affect the sealing performance of doors and windows. According to the classification of door and window sealing performance, it can be roughly divided into two categories: more locking hardware and single locking hardware. The lock points and lock seats of the multi-spot hardware are distributed around the entire door and window. When the doors and windows are locked, the lock points and lock seats are firmly buckled and cooperate with the hinges (hinges) or the slide stays to jointly produce powerful The sealing pressing force makes the sealing strip elastically deformed, so as to provide sufficient sealing performance for the door and window, so that the fan and the box are integrated. Therefore, the multi-spot hardware has many advantages for the sealing of doors and windows, which can greatly improve the sealing performance of doors and windows. The single-spot hardware produced by the relative sealing performance is relatively much worse, because the single lock point can only provide a single point of locking on the door and window opening side, with the hinge (hinge) or slide support can only produce 3, The four lock points cause the door and window to have four corners in an unconstrained state. Therefore, the gap between the two unconstrained corners and the lock point seriously reduces the sealing performance of the doors and windows. Taking the lock side of the handle as an example: Set the window width to B, the window height to H, and the bending stiffness of the window sash to E×I, divided into three conditions: single lock point, two lock points, and three lock points (lock point fan The edge is not less than 0.1mm. According to the mechanical formulae, the maximum deformation value of the sash handle side in the sealing direction is respectively given. It can be seen that the use of three lock points can greatly reduce the deformation of the door and window fan and improve the sealing performance. Of course, under the conditions that meet the strength and sealing requirements, it is not appropriate to use too many lock points, otherwise it will cause waste. Similarly, most of the hinges used in doors and windows need to be cut off from the sealing strip at the hinge position during use. This is due to the influence of the installation hinge on the airtightness. consider? In fact, the negative effect of gap penetration caused by cutting the sealant strip (and the critical sealing position) is basically ignored by everyone. Therefore, the effect of door and window hardware on the airtightness of doors and windows should arouse our attention. >>> When the country meets IKEA Happy house slave sun 55 flat small apartment decoration Doors to buy hardware to buy doors and windows window layout type decoration Double Side Polyester Foil Composite Copper Foil,Copper Tape,Copper Scrap Super Alloys Incoloy Alloys Co., Ltd. , http://www.nsnichrome.com
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