You often overlook these two important hardware parts of doors and windows.
The sliding brace and single-point closer are two very important hardware parts. They play an important role in the door and window system, but most people do not understand their role, so they underestimate their importance, which brings a very bad experience to the use of windows.
Sliding brace
As an important part of the window sash opening, the sliding brace is related to whether the window sash can be opened smoothly and the stability of the window sash. It is an important hardware that plays the role of normal opening and closing and positioning of the window sash. The sliding brace is divided into the sliding brace for internal and external casement windows and the sliding brace for top and bottom hung windows.
Performance requirements for window sliding brace
(1) Self-positioning force of sliding brace
The performance requirements of sliding brace for internal and external casement windows must be no less than 40N, otherwise, the opening and closing positioning ability of the window sash becomes unstable, which may cause difficulty in opening and closing the window sash.
(2) Window opening and closing force
The ratio of sliding brace for internal and external casement windows cannot be greater than 40N. Within the window sash opening range of 0-300mm, the opening and closing force of the sliding brace for external top-hung windows should not exceed 40N.
(3) Door and window gaps
When the window sash is in the closed state, under the action of external force, the change in the sealing gap between the sash and the frame at the window corner where the sliding support is installed should not be greater than 0.5mm
(4) Rigidity of the sliding support
The rigidity of the sliding support should be determined through experiments, that is, the window sash is subjected to different forces at three different positions to determine whether the performance of the sliding support meets the requirements.
1. After the window sash is subjected to 300N of resistance during the process of opening to the maximum opening range, it can still open normally and meet the requirements of its self-positioning force, opening and closing force, and the gap between the window sash and the window frame.
2. When the window sash is subjected to 300N of resistance during closing, the window sash can still open normally and meet the requirements of its positioning force, opening and closing force, and the gap between the window sash and the window frame.
3. For windows equipped with positioning devices, when the positioning device is opened to the positioning point, after being subjected to an external force of 300N, it can still meet the requirements of the normal opening of the window and the three performance requirements of the window's positioning force, opening and closing force, and the gap between the window sash and the window frame.
(5) Repeated opening and closing
Opening and closing the window sash 25,000 times repeatedly is a test that doors and windows must undergo. Only after 25,000 times of repeated openings and closing, the opening and closing force of the door and window should not exceed 80N to be qualified.
(6) Sliding support strength
After the window sash is opened to the maximum position, it withstands an external force of 1000N. If it does not fall off, it is a qualified door and window hardware.
(7) Hanging heavy objects on the window sash
After the window sash is opened, the sliding support is used to withstand a pressure of 1000N for five minutes. If all the parts of the sliding support are intact, the door and window sliding support is a qualified product.
Single-point lock
Single-point locks are suitable for aluminum alloy sliding windows, indoor sliding doors, etc., including semicircular locks, hook locks, etc.
(1) Strength of locking components
The locking components of the single-point lock should not be damaged after being subjected to a pressure of 400N. The operating force of the single-point lock should be less than 20N to be a qualified single-point lock
(2) After 15,000 repeated tests, the single-point lock should maintain normal use status when opened and closed. This is a qualified lock.