As we all know, as the eyes and energy loss of buildings, doors and windows account for a relatively large proportion of the total energy loss of buildings. With the improvement of China's economic level and living standard, in the current environment that pays more and more attention to environmental protection, how to choose high-quality environment-friendly and energy-saving door and window products has become the mainstream of market consumers' choice. In such an environment, how should door and window enterprises transform their own products? What are the effects of energy conservation and environmental protection on doors and windows?
1. High quality and energy saving door and window rubber steal strip is the key
energy-saving doors and windows are roughly composed of profiles, hardware, glass, sealing strip and processing technology modules. The sealing strip is influenced by its low cost and some traditional concepts that do not attach importance to the energy-saving standards of doors and windows, it has always been ignored by many door and window manufacturers, but sealing strip plays a vital role in the door and window system, so what role does EPDM sealing strip play in the door and window system?
The sealing strip is installed on the door and window frame, fan and glass. Relying on the excellent elastic performance of EPDM, the profiles, hardware and glass of doors and windows are closely linked together to form a whole, aowei doors and windows think that according to the basic principle of isobaric design of energy-saving doors and windows, it plays a role of sealing isobaric, so as to reach the three-property standard and energy-saving standard of doors and windows, and to improve the air tightness and water tightness of doors and windows, sound insulation performance plays a vital role, making doors and windows truly become qualified energy-saving doors and windows.
In addition, there are still many manufacturers in the current door and window industry who still do not talk about the technical connection and integrity of the door and window system. The Door & window profile and accessories used are pieced together to combine the materials accessories that do not match with each other, as a result, there are many problems and defects after the doors and windows are manufactured, or the processing technology is not well controlled. Finally, sealing strips are used to make up for the defects of the windows so as to improve the overall performance of the doors and windows, it conforms to the standard of energy-saving doors and windows, and to solve such problems, the high and low product design ability and technical production capacity of sealing strip manufacturers are very critical.
II. Function of sealing strip in energy-saving doors and windows
1. The importance of materials
at present, most energy-saving doors and windows are made of EPDM rubber. EPDM is a copolymer of ethylene, propylene and a small amount of third monomer. EPDM is named as EPDM for short in international name. EPDM rubber has excellent resistance to sunlight and ultraviolet rays, weather resistance (the service life is the same as that of doors and windows), heat-proof aging, high and low temperature resistance, ozone proof, chemical resistance, water resistance, good electrical edge and elasticity, and other physical and mechanical properties. Also known as crack-free rubber, it is recognized as the best material for producing sealing products in the world.
At present, there are still a lot of fake EPDM sealing strip in the market, and the slogan promoted by some manufacturers is what kind of sealing strip customers need, EPDM sealing strip of more than ten yuan per kilogram, even EPDM sealing strip of several yuan per kilogram are available, but a little EPDM is added to the production of sealing strips as EPDM sealing strip products. As we all know, the most important thing of EPDM rubber is the formula. If the formula does not meet the requirements, the physical properties of EPDM cannot be guaranteed. Its superior performance can only be empty talk, and it costs several yuan or EPDM sealing strip of a dozen yuan, the formula cost cannot meet the requirements of genuine EPDM, cannot have the superior performance of EPDM, cannot meet the expected requirements of door and window system, and cannot guarantee the triality standard and energy saving standard of doors and windows, unable to achieve Qualified Energy-saving doors and windows.
2. Importance of design ability
it is very important to adjust the formula and design the mold of sealing strip with qualitative and quantitative theories according to the physical properties of the formula (such as hardness and voltage transformer rate), otherwise, no matter how good the sizing materials is, it cannot give full play to the advantages of EPDM. For example, to design an isobaric sealing strip, first measure the profile and sample window, understand the system structure of profiles and the degree of coordination between profiles and hardware, and measure the measured value. If you need to make up for the defect of coordination between profiles and hardware, you will take the compensation defect value into account in the design quantity, then, according to the physical property value of sizing materials, the optimization design is carried out, and the optimization design is carried out in a non-critical position, which can reduce the meter weight, in order to achieve the goal of reducing the cost of customers. Many manufacturers with weak design ability do not understand the door and window system, blindly copy and do not consider the matching quantity of profiles and hardware. The designed sealing strips cannot complete the sealing performance of doors and windows well, it's just like the decorative strip. It has caused great economic and reputation losses to door and window manufacturers.
3. Importance of dimensional tolerance
adjusting the formula and designing the sealing strip are only the basic beginning of ensuring the product quality. The control of dimensional tolerance is an important standard to measure the high and low production technical capacity of a manufacturer, for each batch of qualified finished products, the size difference is generally not felt by naked eyes and hand feeling. Now there are still many sealing strips in different sizes in the market, which can be directly seen by flesh eyes and touched by hand feeling, when the uneven size is installed on the doors and windows, there will be some tight places, some loose places, some gaps between the sealing strip and the profile, or the sealing strip will fall off the profile after a period of time, in this way, most of the heat energy of doors and windows is lost through gaps. How can doors and windows have excellent three-property standards and energy-saving and heat-preservation performance? Many energy-saving doors and windows are leaking, which has a lot to do with this reason. Manufacturers with high production technology capacity generally implement strict quality system. The arrow logo shown in the following figure is the key size of the product. When making the product, the staff will focus on the measurement, control these key dimensions.
Strict quality control is carried out on the key dimensions of the product, and the product is subject to modern quality management such as 50 meters per batch, ten times enlarged picture detection of the Strip section and quality control chart monitoring, it ensures the product size tolerance and the control of the difference between each batch of products. Only in this way can the door and window manufacturers ensure the product quality and the stability and standardization of process production, only the sealing strip can guarantee the three standards and energy saving standards of doors and windows, and make qualified energy saving doors and windows.
