The formulation of the former European style doors and windows and linea Americana ventanas de pvc has not been widely recognized, because this highly regional formulation is not consistent with the scope of its actual application, and the standard does not give this formulation. sure. In order to distinguish between the two, the editor of shandong lumei uses this term for ease of explanation.
The most significant difference between linea Americana ventanas de pvc and European windows is the structure of sliding windows.
The push-pull fan of the European style window slides on the guide rail of the push-pull frame, that is, the fan package frame structure is often referred to. The seal is formed by the top of the inner side of the push-pull fan and the two sides of the guide rail. The sash of the American sliding window slides in the groove of the sliding frame (that is, the frame sash structure), and a separate guide rail can be installed in the groove, or it can slide directly on the bottom surface of the groove. The sealing of American windows is realized by the tops between the outer side of the sliding fan and the two sides of the groove. The tops can be installed on the sliding fan or on the side wall of the groove of the sliding frame, as shown in Figure 2. It can be seen from the comparison of the two structures that the latter has better watertightness and airtightness. For this reason, people have made targeted improvements to European-style sliding windows.
That is, a sealing guide rail is added between the two push-pull fans to improve the water-tightness and air-tightness of the whole window.
The sash of the European-style sliding window is welded with the same profile. After welding, the shape of the whole sash is uniform and the shape is neat and tight. The sashes of American sliding windows are usually composed of two or more profiles, which are either welded or screwed. Various fans have their own functions, and some fans are directly designed with push-pull (or lift-pull) handles on them (this is a more humane design, which is worth learning from in future designs); some fans directly The function of the cover plate is designed on the top, thereby eliminating the cover plate profile; some fans are designed with grooves for installing pulleys at the bottom. After these types of sashes are connected together, the shapes around the entire window sash are not consistent, and there are often gaps or holes in the joints, but it does not affect the visual effect and performance of the entire window.
A very important window type in linea Americana ventanas de pvc is the upper and lower lift windows (single lift windows and double lift windows). This window type is a self-contained system with distinctive features. The lifting window mainly relies on a kind of hardware called a balancer to realize the function of lifting and balancing the window sash. The salient feature of the lifting frame is that it has one (single lifting) or two (double lifting) opening slots for installing the balancer.
2. The glass of American doors and windows is mostly sealed with glass glue or co-extruded soft PVC.
The window sash or fixed window sealed with glass glue has very good water and air tightness, because the glass and the window sash have become a whole at this time. However, the glass crimped by this method is inconvenient to disassemble and replace. At the same time, because the glass and the window sash are rigidly connected, when the strength of the door and window is checked, the allowable deflection of the main force-bearing member is higher than that of the flexible glass. The allowable deflection should be low (when the window is flexible inlaid single-layer glass, [f]=L/130; when the window is rigid inlaid single-layer glass, [f]=L/160).
Co-extruded soft PVC is used for sealing, so that two products are formed on one production line, which can save the process of "wearing the sealing strip" during the processing of plastic windows. At present, the co-extrusion molding technology is popular after use. The two composite materials have a certain connection strength, which can meet the use function of the product, and can be easily separated when the materials need to be recycled separately.
3. The sealing principle of American-style casement windows is basically the same as that of European-style windows.
The difference is that the American-style casement window is opened and closed using special hardware accessories such as a window shaker. The rotary motion is converted into the reciprocating motion of the support arm through the meshing transmission device, thereby driving the opening and closing of the window sash. In addition, the thickness of the American casement window frame material is relatively large (such as 76mm or 80mm, etc.), and there are usually three seals in the structure (as shown in Figure 7), and its sealing effect is very good. The screen fan of American window (the same applies to the sliding screen fan) is generally small in cross-section size, and is mostly made of aluminum alloy
(It is also made of PVC profiles), not only the screens have higher strength, but also the screens are very light.
Fourth, the bottom splicing form of termopanel de pvc is also different
At the same time, because the structure of the window opening in the American building standards is relatively uniform, the installation method has its own characteristics. Many frame materials are designed with installation fins at the bottom, which can be directly installed on the opening frame. In this way, the overall connection strength and installation tightness of the window frame can be increased, and the deformation during the installation process can be reduced. This structure is also often used in the renovation of old windows.
5. The wall thickness of termopanel de pvc profile is thin, generally not more than 1.8mm; the frame and fan cavity structure is more complicated, the number of internal stiffeners and chambers are large, and the cross section of the window sash is small, so the size of the steel lining cavity is affected. It is not suitable to make large windows due to the limitation of wind pressure resistance. In addition, American window profiles are mostly formulated with organic tin stabilizers, which are lead-free. This is of great significance in today's increasing emphasis on health and environmental protection.
It can be seen from the above that although termopanel de pvc is also developed from the introduction of European plastic window technology, it has not copied the European design, but has been transformed and innovated in accordance with the characteristics of the local area. This is inspiring for my country's plastic doors and windows and even the entire chemical building materials industry. Although the plastic window industry in my country started late, it also has more things to learn from. It is believed that by absorbing the characteristics of European and American plastic window technology, my country's plastic door and window industry will develop more perfect and more colorful.