1, anti-theft wooden window selection method The selection of wooden windows is mainly the selection of styles and wood. The wood is generally dominated by larch and eucalyptus. These can be selected according to individual conditions and are better identified. Therefore, we will not talk about it any more. Nowadays, there are many brand styles of plastic windows and aluminum alloy windows on the market, and the prices are also very different. Consumers are generally difficult to choose, so we will focus on introducing these two aspects of knowledge. 2, anti-theft aluminum alloy window selection method When purchasing aluminum alloy windows, as long as you pay attention to the following aspects, you can ensure that you buy more attractive products: (1) Look at the thickness of the material. Aluminum alloy windows generally have 55 series, 60 series, 70 series, and 90 series. Series numbers indicate the thickness of the thickness of the structure in millimeters. When selecting different series of windows, it should be determined according to the size of the window hole and the local wind pressure value. If you are using an aluminum alloy window as a closed balcony, you should choose a series of less than 70. The thickness of the window is generally 1.2 to 2.0 mm, the tensile strength should be 160 N/mm2, and the yield strength should be 110. If you think that this data is difficult to measure accurately, you can bend the profile by hand during the purchase process to see if it can be restored to its original state after being released. It is a qualified product that can be restored to its original shape. (2) Look at the color of the material. The color of the aluminum alloy profile should be consistent, if the color difference is obvious, do not buy. If you find that the surface of the aluminum alloy profile has sunken or bulging, you should also choose carefully. (3) See the gloss of the profile. If there are obvious defects such as white spots (open bubbles), black spots (ash), cracks, burrs, and peelings on the surface of the aluminum alloy window, it is better not to purchase it even if the selling price is relatively low. (4) Look at the oxide film thickness. True qualified aluminum alloy window, its oxide film thickness should reach 10 microns, if you do not know how to measure this, you can lightly tap on the surface of the profile to see if the surface of the oxide film can be erased. Can be easily wiped off, then the quality of this aluminum alloy window is not qualified. (5) See processing. Most of the high-quality aluminum alloy windows are finely processed, the installation is particular, the sealing performance is good, and the switches are free; while the poor quality aluminum alloy windows are made with rough workmanship, the sealing performance is poor, the switch is not free, and there is leakage of air or glass after installation. Shock and other phenomena. (6) Look at the price. Under normal circumstances, the production cost of high-quality aluminum alloy windows is relatively high, so the price is also about 1/3 higher than that of inferior aluminum alloy windows. The reason why the inferior quality of aluminum alloy windows are so cheap is mainly because they use materials whose wall thickness and tensile strength and yield strength are lower than the relevant national standards. Such windows are unsafe to use, so they are buying such When it comes to windows, it is good to use the products of regular aluminum alloy door and window manufacturers. 3, anti-theft plastic steel window purchase method Plastic-steel windows are the most popular at present, so the selection of them also requires special care. In general, as long as you pay attention to the following aspects, you can ensure that your choice of products is the best: (1) Select profiles. From the current point of view, most houses belong to high-rise buildings, and the area of ​​windows is generally relatively large. Therefore, when selecting profiles, it should be noted that the wall thickness of the profile should be greater than 2.5 mm, and the thickness of the lined steel plate should not be less than 1.2 mm. (2) Check the surface quality of the material. The color of the plastic surface should be ivory or blue and white, and it is very clean, smooth, smooth, there is no large area of ​​scratches, bumps, welding mouth without opening, fracture. If its color is too white or yellow, it means that the stable composition of the material is not good, and it will deteriorate easily after a long time. (3) Check the glass and hardware accessories of the window. The glass of the window should be flat, free of water, and securely mounted. In the case of double glazing, there should be no dust and moisture between the two layers. The hardware accessories for the windows should be complete, in the right position, securely installed, and flexible to use. Generally, the hardware accessories for high-end windows are made of metal. Its internal strength, appearance, and performance are all very good. Many middle- and low-grade plastic windows are available. The use of plastic hardware accessories has hidden dangers in its quality and longevity. (4) Check the relevant documents. At the time of purchase, it is necessary to check whether the manufacturer of the doors and windows has issued a production license issued by the local construction committee, so that it is possible to ensure quality and reputation. Purchase window common sense In order to ensure that you can buy the best products, you need to pay attention to the following issues before and during the purchase: 1 First of all, it is necessary to determine whether the window opening method is to purchase a sliding window or a flat window. If you are ready to purchase a casement window, you are ready to choose whether to open or close. In the building materials market, some vendors deliberately exaggerate the sealing performance of sliding windows when selling them. Actually, this is not credible, because the sliding window does not actually have the sealing performance of the opening window. 2 Determine what kind of glass is installed. Is it prepared to install single-glazed, double-glazed or insulating glass? In general, the soundproofing and thermal insulation performance of windows fitted with hollow glass are the best. 3 Measure the approximate size of the window before going to the market. The windows currently on the market are all responsible for installation, because some unscrupulous merchants will make false reports when making measurements to earn more profits, so we must be aware of the size of the windows. 4 shop around. No matter what time you buy, don't forget to shop around because the goods are not only more than the price, but also help you understand more relevant knowledge and can better identify the quality of the product. Hardware balcony window aluminum alloy glass door price glass door security window Precision CNC machined stainless steel parts are becoming a choice for many industries due to its desirable physical properties! Stainless Steel is one of the most popular industrial alloys for many CNC machining projects, due to its excellent physical properties. The below benefits have made Stainless Steel parts and products a viable choice for many industries and applications, though they are particularly favored in the medical, automotive, aerospace, healthcare and consumer electronics spheres. While the best and fastest way to make Stainless Steel parts is CNC machining especially CNC milling with stainless steel reach far and wide. 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At present, when people purchase a commercial house, most of the developers will close the window, and ordinary residents generally do not have access to the window. If this is the case, it is generally also desirable to close the balcony or to avoid the sound insulation of the original window. The sound insulation is not good. It is intended to replace or add a layer of windows to the original foundation. Although this is not a complicated matter, it is still more troublesome for the average consumer, so we will introduce to you how to choose a security window .