Plastic steel doors and windows as a new type of building energy-saving products, due to its inherent distinctive features in recent years has been rapid development, widely recognized by the community. However, during the actual use, many problems have also been exposed, among which the problem of seepage of doors and windows is particularly acute, accounting for more than 60% of the complaints about the quality of doors and windows. Research and study to improve the steel doors and windows watertight measures to eliminate the potential hidden dangers of steel doors and windows, improve the overall performance of steel doors and windows, and promote the development and development of plastic steel doors and windows has important practical significance.
The sliding window is restricted by its own structure. The push-pull fan and the frame are sealed by the wool strips. The water blocking performance is poor and the water tightness is low. Generally, it can only reach the third and fourth grades, and it is extremely difficult to reach the second grade. Casement windows due to the frame between the fan, the shape of the rubber seals sealed, and tightly pressed together, rain water is difficult to pass, so the watertight correspondingly guaranteed, can reach more than two.
First, the rainwater leakage
To explore measures to improve the watertightness of plastic sliding windows, first analyze the way in which rainwater spills into the room. There are roughly the following conditions:
1. There is too much water in the frame and the rain spills into the room through splashes or directly through the window frame.
2. The rain seeps into the room through the joint between the frame and the wall or between the frame and the frame.
(1) The gap between the window frame and the wall due to thermal expansion and contraction, rain will seep into the room;
(2) If the splicing sections of the splicing sections are out-of-seam splicing sections, rainwater cannot enter the spliced ​​section and enter the room.
Second, improve the sliding window watertight process measures
The height of the sliding window screen slide and the push-pull slide is the same, and the slide is generally on the indoor side. After the aluminum slides are installed on the sash slides, the height of the outer slides exceeds the height of the inner slides. When the rainwater is relatively large, the water in the window frames overflows into the room. In order to prevent rain from spilling into the room through the chute, the height of the gauze slide can be increased to form a breakwater and the slides in the window frame can be high outside and low to prevent rain from spilling into the room.
(1) It has been calculated that the height of the slide of the yarn fan is increased by 5mm, the pressure is increased by 50Pa, and the watertight performance is improved by one step. However, this method cannot be added too high, otherwise it will affect the operation of the transmission handle. In addition, the other three sides of the window frame that have no effect on the watertightness are correspondingly heightened, which will inevitably result in the waste of materials and lower the output rate under the same conditions. In addition, instead of directly increasing the height of the window frame gauze slide, a heightened aluminum slide is attached to the gauze slide, which achieves the same water-repelling effect as the above method without reducing the yield. However, the appearance of the window will be affected.
(2) Rainwater flowing into the window frame through the fan outside the window increases the burden of the window frame drain. There is no way to change the rainwater flowing from the glass into the frame on the inside of the sliding window. The outer sash, on the upper part of the fan, can accumulate a certain amount of rainwater. Most of this rainwater flows into the frame through the fan. If a drape is added to the upper part of the outer fan, this kind of rainwater can be avoided and the amount of rainwater accumulated in the frame can be reduced.
The glass strip and the glass bead on the inner side of the fan penetrate directly into the room. European-style doors and windows of the glass inlay is generally dry inlay, glass does not directly contact with the fan and the pressure bar, but through the strip and the glass contact. As most manufacturers now use glass strips with +K> shape seals, which are bulky and hard textures, the strips are divided into four sections in one sash, sealed with sealant at the corner joints, and even sealed. After a long period of aging, the corners easily seep. The push-pull fan has poor drainage, especially the double slide frame, and the seepage water flows directly into the room. If the dry tessellation is changed to wet tessellation or semi-wet tessellation, the sealant of glass and slewing is sealed with the sealant instead of the sealant, the sealing effect is good, and the strength of the fan and the glass are integrated into one and the strength is enhanced.
Increase the size of the drainage trough of the push-pull frame, and open two drainage troughs on the opposite bottom frame of the double-sash sliding window, and open the air pressure balance hole on the top frame. The size of the drainage trough is not less than 5/40mm. In addition, the inner and outer drains are staggered and the outer cover is covered with a windproof cover, which can effectively prevent the backflow of rainwater, ensure the smoothness of the rainwater passage, greatly improve the drainage capacity of the window frame, and reduce the accumulation of rainwater in the frame. The specifications of the windproof block at the overlap between the inner and outer fans shall be matched with the frame, sealant shall be applied around the joint of the frame, and siliconized wool strips with spacers shall be used to ensure a good seal, so as to reduce the flow of water inside the containing tank to the inner fan. The outer fan is opposite the holding tank.
(3) Rain water penetrates into the reinforced cavity through the cap of the process hole or the fixing screw of the wind block, and penetrates into the wall through the gap of the fixing screw in the reinforced cavity. Because this type of infiltration is inside the profile, it is easily overlooked. However, many windows and doors precisely cause rainwater to infiltrate the wall and then seep into the room from the wall. Such seepage due to passing through the enhanced cavity, but also directly corrosion enhanced steel, a long time, the security of the doors and windows to bring hidden problems, must be improved from the production and installation process, to prevent the occurrence of such seepage. Before installing the cap, sealant should be applied at the place where the cap and the frame are in contact to make it seal well to prevent the infiltration of rainwater.
When the bright window is spliced ​​up and down, or the doors and windows are vertically spliced, the water seeping through the seams. Splicing up and down, sealant is glued on the outdoor side of the splicing site; on the left and right splicing, sealant is applied on both sides of the outdoor side to prevent rainwater from seeping inside the joint. Rainwater seeps into the room directly from the underside of the windows and doors. This situation was caused by the improper installation of windows and doors. Because the expansion coefficient of the plastic doors and windows is larger due to its material, in the installation of doors and windows to keep a certain gap with the hole, this gap is installed in the door and window after the filling with elastic materials such as styrofoam to compensate for the window due to thermal expansion and contraction Changes in size prevent rain from seeping in.
Third, the conclusion
Sliding window through the implementation of the above process measures, from the selection, processing, installation and other aspects of strict control, precision production, the watertight performance of the national standard to two.
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