Hardware accessories are the key components that determine the performance of doors and windows. The design of aluminum doors and windows is first of all based on the architectural design of the performance of doors and windows. In order to meet the functional requirements of the building, the performance of aluminum doors and windows and related design requirements are reasonably determined. The architectural design of doors and windows is based on the aesthetics of the whole house and the characteristics of the wind pressure, water tightness, air tightness, heat preservation, heat insulation, and sound insulation of the whole area. Imagine that according to the physical properties of doors and windows (wind pressure resistance, water tightness, air tightness, sound insulation, heat insulation, heat insulation, etc.) and mechanical performance (lifting and closing power, repeated opening and closing) ,which one is not related to door hardware accessories of doors and windows.

Hardware accessories are the parts that are responsible for the close connection between the frame of the door and the window and the fan. Without its existence, the doors and windows will only become dead fans, which will lose the significance of the doors and windows.

As the test of door hardware accessories shown,we can know that the effect of hardware accessories on the first performance of doors and windows against wind pressure performance determines the success or failure of doors and windows; similarly, air tightness, water tightness, heat preservation, heat insulation, and sound insulation are all related to the door and window seals involved in hardware accessories.

When the doors and windows are locked, the lock points and the lock seats are firmly buckled and cooperate with the hinges or the friction stays to provide a strong sealing pressing force so that the seal strips are elastically deformed, thereby providing sufficient doors and windows. The sealing performance of the sash and frame can greatly improve the performance of doors and windows. Similarly, the mechanical performance indicators (opening and closing force, repeated opening and closing) of doors and windows, and other opening and closing requirements are inseparable from the requirements of hardware accessories.