There are many types of door and window hardware that have an impact on the sealing performance of doors and windows; according to the sealing performance of doors and windows, they can be roughly divided into two categories: multi-lock hardware and single-lock hardware. The effect of door and window hardware on the airtightness of doors and windows should cause the door and window enterprises to pay sufficient attention.
The lock point and lock seat of the multi-lock hardware are distributed around the whole door and window; when the door and window are locked, the lock point and the lock seat are firmly fastened together, and cooperate with the hinge (joint) or the sliding support to jointly generate a powerful The sealing pressing force makes the sealing strip elastically deform, thereby providing sufficient sealing performance for the door and window, so that the fan and the frame are integrated; therefore, the multi-locking hardware has many advantages for sealing the door and window, and can greatly improve the sealing performance of the door and window. . The sealing performance produced by the single-lock hardware is relatively poor. Because the single-locking point can only provide a single-point locking on the opening side of the door and window, it can only produce 3 with the hinge (joint) or sliding support. 4 locking points, resulting in 4 corners of the door and window in an unconstrained state, therefore, from the two unconstrained angles to the gap between the locking points, the sealing performance of the doors and windows is seriously reduced.
Take the handle side lock point arrangement as an example: set the window width to B, the window height to H, and the sash bending stiffness E×I, which are divided into single lock point, two lock points and three lock points (lock point distance fan) The edge is not less than 0.1mm), and the maximum deformation value of the handle side of the sash in the sealing direction is given according to the mechanical formula.
It can be seen that the use of three lock points can greatly reduce the deformation of the door and window sash and improve the sealing performance.
Of course, under the conditions of meeting 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; and this part is affected by the airtightness caused by the hinges. Consider? In fact, the negative effect of the gap penetration caused by the cutting of the sealing strip on energy saving is basically ignored.
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Tag: Sealing performance Hardware Door and window hardware Pressing force Sealing strip
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