Griendly Technology Technology Sharing: What are the characteristics of precision rubber and plastic components used in the automotive field?

Precision rubber and plastic components are used in the automotive field, and their core features are high adaptability, multi-functional integration, weather resistance, durability, light weight and low cost. They can not only meet the harsh working conditions of automotive power, chassis, body, interior and other systems, but also help the automobile to save energy and reduce consumption and intelligently upgrade. The specific features are as follows:

Material performance adapts to complex working conditions of automobiles.

High-low temperature resistance and aging resistance: special rubber and plastic materials such as nitrile rubber (NBR), fluororubber (FKM) and silicone rubber (VMQ) are adopted, which can withstand the extreme temperature of-40℃~150℃ (engine compartment parts can even reach 200℃), and will not harden or crack under long-term exposure or low temperature environment; Strong anti-ultraviolet and anti-ozone aging ability, the service life can reach more than 10 years, which meets the requirements of automobile quality assurance.

Oil resistance and chemical corrosion resistance: the oil seal, oil pipe, gasket and other components around the engine can resist the corrosion of engine oil, gearbox oil, fuel oil and other media; Chassis components can resist the impact of road sand and gravel, acid and alkali corrosion of rain, and maintain stable performance.

Excellent damping and noise reduction performance: the elastic modulus of rubber and plastic materials can be adjusted. When used in engine mounts, chassis bushings, damping pads and other parts, it can effectively absorb engine vibration and road bumps, reduce the noise inside the car (it can reduce the noise inside the car by 5~10dB), and improve driving comfort.

Precision forming meets the requirements of automobile high-precision assembly

Strict dimensional tolerance control: The key dimensional tolerance can reach ±0.05mm through high-precision injection molding and extrusion process, which is suitable for modular assembly of automobile parts (such as sensor sealing ring and electronic controller shell) to avoid leakage and sticking caused by dimensional deviation.

Integrated molding of complex structure: it can integrate various functional structures, such as rubber-plastic composite components with metal inserts (bearing bushings and wire harness sheaths) and multi-layer co-extruded oil pipes (oil resistance in the inner layer and wear resistance in the outer layer), thus reducing assembly procedures and improving production efficiency.

High surface quality: the surface of interior rubber and plastic components (such as instrument panel sealing strip and door anti-collision strip) is smooth and burr-free, with delicate touch, which meets the requirements of beauty and touch of automobile interior.

Multi-function integrated coverage automobile multi-system application

Sealing and protection function: components such as door sealing strip, skylight rubber strip, engine compartment gasket, etc. have triple functions of waterproof, dustproof and sound insulation, and the protection level can reach IP67, so as to protect electronic equipment and engine core components in the car from external environment erosion.

Fluid transmission function: rubber and plastic pipes such as fuel pipe, cooling water pipe and brake hose can stably transport media such as fuel, cooling liquid and brake fluid, with excellent pressure resistance (the pressure resistance of brake hose can reach more than 10MPa) and no leakage risk.

Electrical insulation and protection function: the insulation strength of the harness sheath, connector sealing ring and other components is ≥20kV/mm, which can protect automotive wiring harness from abrasion and short circuit and meet the safety requirements of high-voltage electrical system of new energy vehicles.

Lightweight and environmental protection fit the development trend of automobile.

The advantages of light weight are obvious: the density of rubber and plastic materials is much lower than that of metals (rubber density is about 1.1 ~ 1.5g/cm, and plastic density is about 0.9 ~ 1.2g/cm). Replacing traditional metal parts (such as metal oil pipes and metal bushings) can reduce the weight by 30%~50%, which can help cars reduce fuel consumption and improve their endurance (the endurance of new energy vehicles can be improved by 2%~5%).

Environmental compliance: use halogen-free and low VOC (volatile organic compounds) rubber and plastic materials, which meet the environmental protection standards such as REACH and RoHS of the European Union, and the odor level in the car is ≤3, so as to avoid the volatilization of harmful substances from affecting driving health; Some materials can be recycled, which is in line with the goal of carbon neutrality in the automobile industry.

Adapt to the special needs of new energy vehicles

High-voltage and high-temperature resistance: components such as battery pack seals and electric drive system oil seals of new energy vehicles can withstand 300~600V high-voltage electrical insulation requirements, and at the same time adapt to the temperature rise during battery charging and discharging (the internal temperature of battery pack can reach 60~80℃).

Flame-retardant and explosion-proof: the battery pack is made of rubber and plastic insulation pads and flame-retardant sheaths, and the flame-retardant grade reaches UL94 V-0, which can delay the fire spread when the battery heat is out of control and improve the safety of the whole vehicle.