[China Glass Network] At present, the increasingly stringent standards and requirements for door and window engineering projects in China, in order to facilitate the construction party to better achieve wind pressure resistance, water tightness, air tightness, heat preservation, sound insulation, lighting, etc. Safety and other aspects of door and window performance requirements, to avoid the recurrence of common problems in exterior doors and windows engineering, China curtain wall network editor for you to sort out several key points in the quality of doors and windows, and hope to provide some guidance for the control of door and window production and construction process .
First points for <br> <br> on the outside doors and windows a quality control performance, airtight
1. Corner seal (adhesive angle):
The sealing strip should avoid corner stitching. The sealing strip at the corner should be designed as a 90 degree integral rubber angle.
2, frame fan seal:
It is advisable to design three sealing strips for the opening of the fan parts, namely the main sealing strip, the fan pressing strip and the frame pressing strip.
Second, anti-leakage
1. The outer window must be provided with drainage channel, drain port and exhaust hole (pressure balance hole) to discharge water in the window frame fan. A buckle cover shall be provided on the outside of the drain to prevent strong wind from blowing rain and dust into the window sash.
2. The heat insulation strip should adopt C-type structure, which is combined with the inner and outer aluminum profiles on the same horizontal surface to avoid leakage and corrosion hazard caused by water accumulation at the heat insulation strip. At the same time, the length of the insulation strip can be increased to improve the thermal performance.
3, door and window opening size: the structure of the hole should not be too large to avoid leakage difficulties caused by leakage.
Table 1 Unit: mm
4, the mouth: window for special reasons, such as the outer wall of the stone curtain wall, the hole is reserved for large size, the structure of the hole is recommended to do the mouth, the mouth should be poured with the concrete wall at the same time.
5, the outer window slab: the exterior wall material is the paint construction, it is recommended to use metal window sill. The inside of the metal window sill should be pressed into the window frame, and the outer side of the wall should be dripped.
6. Window frame and structure hole: The window frame should be installed in the vertical. If it is installed on the outside, it should be retracted 20mm inward to prevent the structural construction error from causing the window frame to be installed outside the structure skin, causing rainwater leakage.
Third, the frame fan structure 1, the group angle: group angle is an important process related to the integrity of the door and window.
Gluing process: Under normal circumstances, the corner code + smear angle glue process should be adopted, and the window corner is prohibited from being unsmeared or extruded.
Injection molding process: the corners can also be angle code + guide groove + injection hole + two-component injection + angle piece process to ensure the corner strength requirements, to ensure that the door and window products are not deformed after transport and installation. appear.
Fourth, thermal insulation
1. Cavity design of profile: The profile should adopt multi-cavity structure to reduce the loss of heat. At the same time, the external window insulation member should be co-planar to form an integral heat insulation surface, eliminating the cold bridge and blocking the heat loss passage.
2. Heat-insulating rubber strips should be installed in the glass installation tank: increase the number of air chambers, reduce the heat loss between the hollow glass and the profiles, and improve the insulation effect of the whole window.
3. The sash should adopt T-type insulation strip design: the sash insulation strip is designed as T-type, which is overlapped with the middle rubber strip to realize the hot and cold partition of the fan frame connection. It is forbidden to place the middle strip directly on the aluminum profile of the fan.
4, the insulation strip should use polyamide 66 (Polyamide66, commonly known as nylon 66).
5, glass warm edge strip: double-sided hollow glass cavity should be surrounded by warm edge strips, blocking the glass cavity heat dissipation channel.
6. In areas with high heat transfer coefficient requirements, according to the project positioning, heat insulation materials can be added in the heat insulation cavity of the profile to meet the K value requirements.
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