Sulfurization bed equipment

The shape can be freely determined, and the hardness can be controlled by adjusting the composition of the rubber formula, which can meet the requirements for stiffness and strength in all directions; High internal friction, good shock absorption effect, conducive to crossing the resonance zone, attenuating high-frequency vibration and noise; The elastic modulus is much smaller than that of metals, which can cause significant elastic deformation; No sliding parts, easy to maintain; Small in weight, easy to install and disassemble, with higher impact stiffness than static and dynamic stiffness, which is conducive to impact deformation. The shock-absorbing effect of rubber and the characteristics of shock-absorbing rubber materials are that rubber has both high elasticity and high viscosity. The elasticity of rubber is generated by the conformational changes of its curled molecules. The interaction between rubber molecules can hinder the movement of molecular chains and exhibit viscosity characteristics, resulting in stress and strain often being in an unbalanced state. The curly long-chain molecular structure of rubber and the weak secondary forces between molecules; This makes rubber materials exhibit unique viscoelastic properties, resulting in good shock absorption, sound insulation, and cushioning performance. Rubber components are widely used for isolating vibrations and absorbing impacts due to their characteristics of hysteresis, damping, and the ability to undergo reversible large deformations.

The hysteresis and internal friction characteristics of rubber are usually represented by a loss factor. The larger the loss factor, the more significant the damping and heat generation of rubber, and the more obvious the shock absorption effect. The magnitude of the loss factor of rubber materials is not only related to the structure of the rubber itself, but also to temperature and frequency. At room temperature, the loss factors of natural rubber (NR) and butadiene rubber (BR) are relatively small, while the loss factors of butadiene styrene rubber (SBR), chloroprene rubber (CR), ethylene propylene rubber (EPR), polyurethane rubber (PU), and silicone rubber are in the middle. The loss factors of butyl rubber (HR) and nitrile rubber (NBR) are the highest.

There are generally five types of rubber materials used for shock absorption purposes, namely NR, SBR, and BR, which are ordinary rubber materials; NBR is used for oil resistant vulcanized rubber; CR is used for weather resistant vulcanized rubber; IIR is used for high damping vulcanized rubber; EPR is used for heat-resistant vulcanized rubber. Although NR has a small loss factor, it has the best overall performance, excellent elasticity, good fatigue resistance, low heat generation, low creep, good adhesion performance with metal parts, cold resistance, electrical insulation, and processing performance. Therefore, NR is widely used for shock absorption purposes. When low temperature or weather resistance is required, it can be combined or blended with BR or CR for modification. The shock absorbers made by Nishiue et al. using NR, BR, and metal salts containing organic acids with carbon atoms greater than 4 containing - OH groups have good durability performance at 70 ℃ × 22h and 40 ℃ × The compression permanent deformation under 148h conditions is 17.0% and 11.7%, respectively. Therefore, it is easy to implement active control. The stiffness k of rubber air springs varies with the load P, so under different loads, the natural frequency ε of their isolation system remains almost unchanged. Firestone air springs, Firestone airbags, DUNLOP corrugated air springs, Goodyea leather bag cylinders, and Goodyear rubber shock absorber airbags also have almost the same isolation effect. The stiffness of rubber air springs is adjustable, and Contitech airbag air springs from Germany welcome you! Contitech air spring, Continental airbag, Firestone air spring, Contitech Firestone airbag, DUNLOP corrugated air spring, Goodyea leather bag cylinder, Goodyear hose shock absorber airbag rubber air spring can change the stiffness of the system by changing the volume or pressure of the air chamber. Due to its excellent weather resistance, ozone aging resistance, electrical insulation, heat resistance, and cold resistance, EPDM has received widespread attention in recent years. Recently, Mitsui Chemical Company of Japan and Kanagawa Rubber Company collaborated to develop a new type of heat-resistant and shock-absorbing rubber material by using a combination of high molecular weight EPDM and low molecular weight EPDM, and obtained a Japanese patent. The various tests of this shock-absorbing rubber show that its shock-absorbing performance is the same as NR, but its heat resistance, low tenderness, and softness are better than other rubbers such as NR.