Common sense of doors and windows?

1. Wooden doors and windows are a kind of traditional building products. Before the 1960s, they were the most important door and window materials in the world. In different markets, its users are very different, ranging from high-end to general. In addition, ethnic differences, religious beliefs, living habits, and aesthetic concepts are different. Therefore, the selection, shape, and color of wooden doors and windows often affect consumers. behavior.

Solid wood doors and windows have been used for countless years. At present, the high-density fiber profiled door has a large market share in the architectural door and window market. This kind of door is a mid-range product. Its styles are diverse, suitable for various types of indoor layouts, and have certain resistance. It is flammable, light in weight, non-deformable, and affordable. The penetration rate in North American residential buildings has reached more than 60%. Honeycomb sandwich doors are energy-saving products abroad, so the sales market is very large. According to relevant information, honeycomb sandwich doors account for about 2/3 of the total output of various architectural doors produced in the UK every year. In Japan, due to the relationship between traditional customs and architectural styles, wooden doors account for more than 50% of the architectural door market.
The types of wooden doors produced in my country are relatively complete, including high-grade wooden doors, intermediate wooden doors, paneled doors, plywood doors, wooden fire doors, sound insulation doors, wooden anti-theft doors, honeycomb sandwich doors (multifunctional household doors), etc. All of them are produced by professional manufacturers, and there are forty to fifty companies with larger output. Together with the production of some other enterprises, the annual production capacity is quite considerable. A few years ago, the statistics reached more than 30 million yuan.

Although our country has few forest resources and wood shortage, the country has not restricted the production of wooden doors and windows because of this. In addition to advocating the development of new materials, the prices of wooden doors and windows are basically opened and controlled by entering the market. At present, wood products account for a large proportion of building door and window materials, especially in the vast towns and rural areas.

With the development of industry and the rise of energy-saving buildings, the lack of forest resources and the increasing importance of human beings on protecting the environment and maintaining the natural ecological balance, the development of new materials has become a trend. Some industrialized countries in the world have already formed the use of plastics and metals. The new pattern of door and window materials with doors and windows as the main and wooden doors and windows as supplements. Therefore, relevant experts suggest that solid wood doors and windows should be developed in the direction of high-grade in the future, and the added value of wooden doors should be improved by means of finishing and high artistic content to meet high-level consumption Demand. At the same time, we must strive to develop and produce energy-saving wooden doors and windows, gradually improve their functions and effects, vigorously develop plant fiber composite doors and windows, and alleviate the shortage of wood resources.

2. Steel and color panel doors and windows
In the period before the advent of aluminum alloy doors and windows, open-web steel windows became the first choice for many high-rise buildings.

This kind of doors and windows that use cold-rolled plates as raw materials, dipped in anticorrosive primer and manually painted topcoat through three-in-one liquid treatment, are generally provided by the manufacturer with window frames, and then attach them after being fixed in place at the construction site. Assemble, cut the matching glass, and apply topcoat. The method is not only inefficient and wasteful, but also the serious problems caused by improper transportation, storage and installation for a long time cannot be solved.

Color plate group angle steel doors and windows were put into production in 1987 after it.

Color plate group angle steel door and window is a new type of open web steel window developed by Italian Secco company on the basis of the original galvanized plate group angle window when the color steel plate has developed to a certain stage and has a considerable output. In addition to the 46 series color panel casement windows and 70 series sliding windows imported from abroad, its product series have successively developed 30, 35 series casement windows and 80 series sliding windows suitable for my country's national conditions.

The inner and outer frames of the doors and windows are assembled into a frame by using connectors (various core boards) with screws. In the production plant, it completes the cutting of all parts, accessories and glass and the assembly of dense strips in a continuous industrial production method, which is provided to the construction site in the form of a complete building component. This kind of door and window has good corrosion resistance, obvious energy saving effect, strong decoration and good sound insulation. Its sliding series fills a gap in steel doors and windows, and soon becomes a more suitable product for medium and high-end buildings in my country.

Although the performance of this door and window is good, it has not been well promoted and applied in my country. The key reason is that there are few domestic high-quality cold-rolled sheet manufacturers, which caused the price of colored steel to rise, and the price of finished windows remained high. The strength of doors and windows competition. For this reason, relevant experts suggested that the equipment route of the color panel group angle steel doors and windows should follow the road of localization, and should not be blindly introduced. The layout and scale of each province, city, and autonomous region are based on 1-2 profile production plants. There are more than 10 assembly plants under the plant, and each profile plant has two rolling mills with an annual output of 5,000 tons of profiles. The assembly plant has an annual output of 20,000 square meters. It is more appropriate to have an annual output of 20,000 square meters. Otherwise, it will easily cause a shortage of the market.

3. Aluminum alloy doors and windows
The good performance of aluminum profile determines that it is well received by architects and users once it is put on the market. As early as before World War II, a small number of buildings abroad were equipped with aluminum windows. Aluminium alloy doors and windows came out in my country in the early 1980s, until the end of the 1990s, basically several old window types from abroad have been used, but they have developed from small to large quantities.

There are more than 1,000 aluminum profile factories in my country, and more than 2,000 extruders of various specifications, but the extrusion tonnage is much smaller, and the large-ton extruder is less. The current largest tonnage extruder reaches 3,600 tons. The color of its aluminum has gradually developed from bronze to white. For the surface treatment of aluminum, in addition to oxidation and electrophoretic painting, resin spraying, paint spraying and fluorocarbon spraying are added. In order to make the surface smoother, chemical polishing and sandblasting are also used. In order to reduce the heat conduction of aluminum profiles, some companies have begun to produce thermally insulated aluminum profiles.

The advantages of aluminum alloy doors and windows have been in the world for decades, and its unique properties have been recognized by the world, light weight, corrosion resistance, high strength, rigidity, non-toxic, high temperature resistance, good fire resistance, and long service life. It can meet the multiple functions of various complex sections, and it is difficult to replace ordinary materials.

With the accelerated pace of reform and opening up, my country’s aluminum alloy door and window industry has developed rapidly, from glass curtain walls and glass roofs to the world’s latest hidden frame glass curtain walls, frameless all-glass curtain walls, and recent developments in Shanghai, Guangzhou and other places. Although the aluminum composite panel curtain wall started late, it has developed rapidly and has a high level.