What kind of function can the door and window hardware play on the door and window?
Multi-lock hardware features lock points and lock seats distributed around the entire door or window. When the door or window is locked, these components firmly engage with each other and work in conjunction with the hinges or sliding supports to generate a strong sealing force. This force causes the sealing strip to deform elastically, ensuring effective sealing performance. As a result, the door or window sash becomes tightly integrated with the frame. The multi-lock system offers significant advantages in terms of sealing, greatly enhancing the overall performance of the door or window.
In contrast, single-lock hardware provides relatively poor sealing. A single locking point can only offer one-point locking on the opening side of the door or window, typically working with 3–4 hinge or sliding support points. This leaves the four corners of the window or door in an unsecured state, leading to large gaps between the locking points and severely compromising the sealing performance. For example, when considering a handle-side lock setup: if the window width is B, height is H, and the sash bending stiffness is E×I, we can analyze the maximum deformation at the handle side in the sealing direction using mechanical formulas. The results show that using three lock points significantly reduces sash deformation and improves sealing effectiveness.
Of course, while more lock points can enhance performance, it's important not to overdo it. Using too many lock points can be inefficient and lead to unnecessary costs, especially when the design already meets strength and sealing requirements.
Additionally, most hinges used in doors and windows require the removal of the sealing strip at the hinge location during installation. This area often becomes a weak point for air leakage. However, the negative impact of this gap on energy efficiency is frequently overlooked. It’s essential to consider how the absence of the sealing strip at critical points affects the overall performance of the door or window.
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Label: Door and Window Hardware
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