Tips for acceptance of plastic steel doors and windows

The appearance of the profiles should be observed. The color should be bluish white rather than white as commonly believed. Pay attention to whether the color of the profiles that make up the frames and leaves of doors and windows is consistent, whether the appearance is uniform, and whether the cavity distribution is reasonable. Calcium carbonate is usually added to the formula of plastic steel door and window profiles as a filling material. However, some manufacturers, in order to reduce costs, add too much calcium carbonate into the formula, which will become calcified plastic. The surface of doors and windows made of this kind of plastic lacks luster, is slightly rough, hard and brittle, and looks like a rough stone. The surface of normal plastic steel doors and windows is usually shiny and tough.

Check whether the fit clearance between various profiles is tight, whether the cut at the fit is flush, and the height difference at the overlap of profiles. Generally, for plastic steel doors, the main parts to be considered are the gaps between the door frames and leaves, the door panel layering and door panel edging, the connection of various profiles of the louver, the sealing strip, etc; If the door panel is assembled, the gap between the door panels shall also be considered; It refers to whether the swing door and two door leaves are transparent after closing. Similarly, for plastic steel windows, in addition to the assembly clearance of various assembled profiles, it is also important to consider whether the sealing strip is uniform and firm. The interface clearance should not be greater than 1mm, which reflects the sealing performance of the window. Plastic steel doors are usually used as interior doors of buildings, and the requirements for sealing are not so high. Various gap values are specified in national standards, but for customers, the smaller the gap values at the joints of various profiles, the closer the fit, and the more sophisticated the assembly process, which reflects the assembly level and the accuracy of the assembly tools.

Check whether the welding points are flush, whether there are cracks, and whether the internal and external corner seams are clean and beautiful. Use a box ruler to measure the diagonal size of plastic steel doors and windows. The diagonal size difference should not be greater than 3mm. The smaller the diagonal difference is, the more sophisticated the process is, and it is also conducive to installation.

The quality of hardware also has a certain impact on the service life of doors and windows. The hardware used should look thick, with good surface gloss, dense protective layer and no scratches. The most important thing is that it should be flexible to open.
According to the national standards, there are different requirements for the wind pressure resistance of plastic steel doors and windows. The inner cavities of the frames and leaves of plastic steel doors and windows need to be equipped with reinforced steel sections. There are three kinds of reinforced steel sections with the thickness of 1.2mm, 1.5mm and 2.0mm according to the height to ensure the robustness and service life of the products.