Design of watertightness of doors and windows:
1. The water tightness of aluminum alloy doors and windows is related to the strength of aluminum alloy doors and windows, section and material of adhesive strip, drainage system, window structure design, etc. In recent years, EPDM has been adopted for adhesive strip, it can ensure good elasticity and aging quality resistance, but the rainwater in the glass groove sealed with adhesive strips will still leak in, so the drainage holes and grooves should be milled.
2. Outwards opening window in the open state, rainwater will flow into the inner cavity from the keyhole of the actuator, causing corrosion of the inner cavity and corrosion of friction lined steel, affecting the strength of the window and Friction hinge screws, therefore, in the design, it should be required that the gap should be sealed with glue after the actuator is installed at keyhole. The glue quota is also given.
3. The splicing place of combined aluminum alloy doors and windows is also a way of rainwater leakage, especially in case of rainstorm and typhoon, which is more serious, therefore, in terms of design, it should be required that fitting-up gang sets of frames in contact with the window frame rubber hanged when splicing on the outdoor side, see the splicing and gluing attached drawing.
4. The design of the connection node between the window frame and the Wall also directly affects the watertightness of aluminum alloy doors and windows. The correct approach should be one-component Styrofoam fill plug gap. At the same time, the Wall glue uses one-component neutral silicone sealant.
5. In the design of arc fixed windows, it is difficult to match the arc of curved glass with the arc of the frame. In special circumstances, the design should be considered as external glue sealing.
6. When the plastic window frame and the frame are spliced up and down, the splicing screws should be connected from bottom to bottom in the design to avoid the corrosion of lined steel caused by rain or dew intruding into the lined steel cavity on the upper side of the nail head.
Design of air tightness of aluminum alloy doors and windows:
1. The air tightness of aluminum alloy doors and windows is related to the strength of aluminum alloy doors and windows bars, the sealing effect of adhesive strips, the gap between bars, the spacing between locking points, hardware assembly and processing precision, etc. The air tightness of the Northern project is particularly important due to the cold winter.
2. Plastic windows are easily deformed due to their poor strength and rigidity, resulting in serious air leakage. The solution is to increase the number of locking points. In our general design, when the fan height and fan width size exceed 1200mm, we should consider adding locking points, and the spacing between locking points should not be greater than 600mm.
The hinge side of the window can be sealed by adding a hidden hinge. The hinge side of the window is closed by the middle lock. In the previous design, the window generally chose a single lock point Middle Lock, however, the locking point is far away from the upper rocker arm hinge, which still cannot guarantee the sealing effect, especially for high-rise buildings. Therefore, in future design, 500mm single locking point intermediate lock can be selected if the fan height is less than 1400mm, for Fan height greater than 1400mm, two locking points intermediate lock should be selected to ensure better sealing effect.
Push and pull aluminum alloy door and window lock points have little effect on sealing, so the design of single locking point can be considered. When designing the window, when the width of the fan exceeds 900mm, a hidden intermediate lock should be placed horizontally on the fan. Casement window generally, the fan horizontal design cannot exceed 800mm, and no locking point can be set.
