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By 袁春凤 (Tiffany)
5 rubber materials for shock absorption purposes
NR.SBR.BR is a common citrus material: NBR for oil-resistant vulcanizates; CR for weather-resistant vulcanizates: IR for high damping vulcanizates; EPR for heat-resistant vulcanizates. NR has excellent elasticity, good resistance to fatigue and aromatics, low tart and creep, good cold resistance, electrical insulation and workability. Therefore, NR is widely used as shock absorber in order to meet the requirements of low temperature or weather resistance, and can be modified with BR or CR. The shock absorber made of NR, BR and metal salts containing organic acid containing one OH group with more than 4 carbon atoms has good durability. The compression permanent deformation at 70Cx22h and 40Cx148h is 17.0% and 11.7% respectively. EPDM has attracted much attention in recent years due to its excellent weather resistance, ozone aging resistance, electrical insulation, heat resistance and cold resistance. Recently, Mitsui Chemical Co. and Kwannukawa Rubber Co. developed a new type of heat-resistant and shock-absorbing rubber material by using high molecular weight EIM and low molecular weight EHIM, and obtained a Japanese patent. The test results show that the damping property of the rubber is the same as that of NR, but its heat resistance and low temperature softness are better than that of other rubber such as NR. "The rubber material made of EDM for shock absorbers on automotive parts has very good heat resistance. After 190C *5 aging, the material still has very good interlaminar adhesion. Silicone rubber R or halogenated IR can be used when high damping is required; U has excellent wear resistance, flexibility resistance and resistance to hydrocarbon fuels and most organic solvents, as well as high physical properties, good electrical insulation, adhesion and aging resistance. . U has also been widely used in shock absorption and sound insulation, such as Adachi, etc. The rubber sheet with good shock absorption and sound insulation is made by U. The effect is good when it is applied to floor, ceiling and bending plate.
Feilong jiangli could supply best quality rubber parts for car body parts.
By 袁春凤 (Tiffany)
Introduction of defects in rubber products vulcanizing
1.Lack of glue: due to insufficient weight or poor fluidity, some defects should be found in rubber parts.
2.Degumming: the failure of rubber and frame inserts will result in disengagement or separation.
3.Bubbles: also known as "bulging", because the gas is coated in the rubber epidermis and the formation of local epidermis blistering phenomenon; Thanks for the help and support of Chongqing Feilong jiangli’s Technical department.
4.Rotten bubbles: also known as "pit gas", because the gas has not been discharged from the cavity, so that the die corner of the rubber cavity is less sulfur sticky, and protruding from the surrounding rubber surface phenomenon
5.Gel cracking: a phenomenon of cracking on the glue surface.
6.Under sulfur: the inner surface of the gum is microporous, and the exterior is uplifted and deformed.
7.Sticking mould: the phenomenon that the local glue of vulcanized product is adhered to the wall of the mold cavity.
8.Hot die: also known as curling edge, "bite edge" and so on, refers to the product parting line is not smooth, cracks, serrated waste edge and other phenomena.
By Charlie Duan
The rubber material determines the service range and service life of the rubber soft connection. Different rubber materials correspond to different medium environments, and the use of rubber materials not suitable for pipeline circulation media greatly shortens the use effect of the rubber soft connection, which may also have a great impact on the service life of the whole pipeline. Chongqing Feilong Jiangli has many years' experience in manufacturing rubber auto parts. Pls feel free to contact me if you have any interest in us. [email protected]
Small refrigerated vans are mainly used for temperature-sensitive items such as food or medicine, so temperature is the key to small refrigerated vans. If the temperature is not adjusted properly, the goods will not be stored or transported in a perfect state. The following are 8 maintenance tips for refrigerated delivery van.
1. Before driving, check whether the oil used in the refrigerated van is sufficient, and the oil can reach the destination smoothly.
2.Check that the battery is connected well, make sure that the wire connecting the battery is not damaged, and remember to check whether the electrolyte is sufficient.
3. Before driving a s refrigerated van, check whether there are any parts that are not tightened or other problems. If there are any problems, you must first eliminate the fault before driving on the road.
4. make sure that the drainage device is unobstructed.
5. When loading goods, remember to keep the goods away from the air outlet of the evaporator, so that the cold air in the cargo box keeps circulating, and there is no place where air-conditioning cannot be obtained.
6. Check whether the coolant is correct. The pointer of the liquid level meter should be within the normal range. If the refrigerating liquid is insufficient, the refrigerating liquid should be refilled in time.
7. Adjust the seat belt to the extent that it is not loose or tight.
8. Check whether the electrical and wire connections are stable. Whether the wires are cracked or damaged.
During our normal use, the maintenance are also inseparable. The refrigeration unit is maintained according to the working hours of the engine. The maintenance time of small refrigerated van units is 500-700 hours. It needs to be replaced, air filter element, oil filter element, fuel filter element, and check the tightness of the belt, whether there is leakage in the refrigeration system, etc. However, in order to meet the needs of environmental protection, some brands of refrigeration units try to reduce the damage to the environment and reduce the emission of harmful substances. Therefore, synthetic engine oil or semi-synthetic engine oil is used to replace ordinary engine oil, thereby extending the maintenance time of the engine. Do maintenance once every 2000 hours.
This car has nothing but issues, now I have water coming in when it rains and my back seat floor is a puddle. Took my spare tire out and have water in there also. Sprayed the whole car down and can see the water coming in when I spray the roof. Looks like it may be coming from the roof rack area. Took the panels off to look and the roof/body seal may be the culprit. Also found a bulletin on this. I ordered some 3M sealer on Amazon so I'll try and replace the seal. Anyone run into this on an equinox or terrain?
By Auto News
Severe weather, unprecedented rainfall and flooding have taken their toll on car owners. Many in the affected areas have driven through high water that may have damaged their vehicles. Even if your vehicle was not flooded or completely covered in water, the non-profit Car Care Council recommends that you follow these guidelines to check for damage due to water intrusion or contamination:
Check interior carpets, upholstery and door and trim panels for dampness. If they are wet, the vehicle needs professional attention. If you simply let the carpet dry, it will quickly grow mildew and give off foul odors. Seat brackets, motors and modules should also be checked for rust and proper operation. Pull the engine oil and transmission fluid dipsticks and differential plug. If the fluid appears milky, diluted, is no longer its original color or is beige in color, then it is likely the pans contain water and the vehicle should be towed to your repair shop. Driving the vehicle with water present may damage the internal parts and require extensive overhaul or repairs. The council reminds motorists that some synthetic differential fluids may appear to be milky, but are not water contaminated. When in doubt, a professional automotive technician should make the evaluation. Check the air filter for water. If it is wet, replace the air filter and change the oil. Check the undercarriage, bumpers, radiator area and frame for mud, grass, dirt, debris and rust. If any of these are present, the vehicle should be washed and cleaned as soon as possible. Have the brake system checked by a professional automotive technician. Check the exterior lights for moisture and water. Replace headlights and bulbs that contain water. Listen for abnormal noises while the engine is running. Make a note of where the noise is coming from and take the vehicle to a professional automotive technician as soon as possible. Have the suspension joints lubricated, if necessary. Many newer vehicles are lubricated at the factory for life; however, these joints should be checked for rust. “It all comes down to how much water the vehicle took in and where it reached,” said Rich White, executive director, Car Care Council. “By being car care aware and following these simple guidelines, you can help minimize the potential for damage to your vehicle.”
The Car Care Council is the source of information for the “Be Car Care Aware” consumer education campaign promoting the benefits of regular vehicle care, maintenance and repair to consumers. For the latest car care news, visit the council’s online media room at http://media.carcare.org. To order a free copy of the popular Car Care Guide, visit the council’s consumer education website at www.carcare.org.
The post How to Tell if Flood Water Has Damaged Your Vehicle appeared first on Be Car Care Aware.
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