Rubber Bumper The Principle And Scope Of Application In Various Industries
Characteristics of rubber shock pad and principles:
Characteristics of rubber is characterized by high elasticity and high viscosity State, and elasticity of rubber is produced by their curly molecules conformational changes, rubber Intermolecular interactions will hinder the movement of molecular chains, and viscosity characteristics, resulting in stress and strain are often in a State of imbalance. Rubber this curling of long-chain molecules and weaker secondary forces between molecules make presents the unique visco-elastic properties of rubber material, which has a good shock absorption, sound insulation and cushioning properties. Rubber parts are widely used to isolate the vibration and absorbs shocks, because of its lagging, damping and reversible deformation characteristics . Hysteresis and friction characteristics of rubber is usually expressed as a loss factor, loss factor larger nihesheng rubber resistance heat more obvious effect is more obvious. Loss factors of rubber materials and rubber not only its structure, but also with temperature and frequency. At room temperature, natural rubber (NR) and BR (BR) loss less, styrene butadiene rubber (SBR), Chloroprene rubber (CR), ethylene propylene rubber (EPR), polyurethane (PU) and loss center of Silicon rubber, butyl rubber (HR) and acrylonitrile-butadiene rubber (NBR) loss factor Max. Of rubber material for seismic purposes is generally divided into 5, namely NR,SBR,BR for ordinary rubber materials NBR to oil-resistant rubber; CR for weather resistance rubber; IIR for high damping rubber; EPR used for heat-resistant Vulcanized rubber. NR although loss factor smaller, but its integrated performance best, has excellent of elastic, resistance fatigue sex good, health hot low, creep variable small, and metal pieces bonding performance good, Hardy sex, and electric insulation sex and processing performance or, so NR was widely to as shock purpose, requirements resistance low temperature or resistance weather performance Shi, can and BR or CR and or total mixed modified sex. Nishiue use of NR, BR and the number of carbon atoms containing-OH groups larger than 4 shock absorbers made of metal salts of organic acids has better durability, at 70 c x22h and 40 ° c under x148h compression 17% and 11.7%, respectively.
Application of rubber shock pad range:
Rubber damping products include rubber mats, rubber fenders, rubber air spring (see picture), sponge rubber and Cork mats, elastic and flexible shaft section takes over several classes. For example: ① rubber bumper. Mostly rubber and metal products, double plate, cylinder, chip, and a variety of forms, for all kinds of machinery, instruments, axles, pipe shock absorption and sound insulation . ② rubber air spring. Good cushioning and impact resistance than metal spring, mainly for the vehicle. Its structure is similar to tubeless tires, to ply for pressure-resistant, air-tight rubber layer, outside the protection of the aging oil-resistant rubber layer. ③ rubber support. Rubber sheet with rigid materials (steel, wire mesh, canvas) bonded together. Which can increase the bearing compressive strength, shear strength had little impact against. Rubber bridge bearing load transfer to the pier of bridge, and can adapt to deformations of the bridge and reduced vibration. Rubber building bearing can reduce subway and around the vehicle and the impact of earthquakes on buildings.