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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]
Recognition of Blind Point Objects by Intelligent Human-Machine Interface and Natural Dialogue with DriversBy Erica Zhu Feilong Jiangli
Nowadays, more and more driver assistance systems equipped with cameras and sensors can detect objects more effectively than drivers. Moreover, speech recognition technology has already been equipped with vehicle navigation system. Traditional driver assistance system can detect objects (vehicles, pedestrians, etc.) and then inform the driver. However, sometimes drivers will be annoyed by such vague and one-way notification, which will lead to the driver taking the wrong road. In response to such restrictions, Mitsubishi Electric has developed new technologies for intelligent notification and natural navigation functions, which are expected to help make driving safer and more convenient.
After identifying the direction the driver is facing, the technology uses intelligent notification to alert the driver about objects beyond the driver's sight. In addition, the HMI Natural Navigation System can respond in a natural dialogue when the driver verbally asks questions about the driving route, without pressing a button or saying an activation word.
Intelligent notification function combines Mitsubishi Motor Maisart image recognition technology and vehicle video camera information to identify potential dangerous objects, such as cars, humans and other moving objects, located outside the driver's line of sight. The object facing the driver is identified by the driver monitoring system (DMS). The system monitors the driver by camera. By comparing the direction of the moving object and the direction of the driver, the blind spot of the driver is estimated. On this basis, the driver is warned by the monitor and the alarm. Tests of Mitsubishi Motor show that the system is particularly effective in detecting objects and attracting driver's attention.
Natural navigation uses DMS and a series of microphones (multiple microphones that record sound simultaneously) to detect when the driver opens his mouth and to understand the driver's voice cues. It is worth noting that the system can not only recognize voice, but also distinguish the questions that the pilot wants to ask about the navigation system and other irrelevant conversations between the crew. Drivers can talk to the system in a highly natural way to provide and receive information.（Edit by Chongqing Feilong Jiangli）
By Erica Zhu Feilong Jiangli
Chongqing Feilong Jiang Li has an independent rubber and plastic workshop, which mainly produces body rubber products, such as bushings, sealing rings and so on. In order to better realize the process and satisfy the design concept, and to ensure the bushing in normal working state more effectively in the process of vehicle assembly, Chongqing Feilong Jiang Li will choose a suitable reference point as the initial zero angle of rubber bushing, which is regarded as the best working state of bushing. In order to keep the best working condition as long as possible, Feilong Jiangli will choose the most common working condition of the whole vehicle as the initial zero angle of the village set. Generally speaking, it is considered that the normal working condition of a car is no-load or half-load, that is to say, the landing state. The corresponding bushing assembly process at this time is called landing tightening technology, that is, tightening the rubber bushing after the vehicle landing. Feilongjiangli's rubber bushing is processed by ingredient, stamping and injection moulding. Each process has strict quality control procedures. The finished bushing is mainly used on Chang'an CS35 and CS75 models.
By 袁春凤 (Tiffany)
Inspection rules for rubber parts for automobiles
Test method of indentation hardness based on GBT531.1-2008 rubber pocket hardness tester
contents and requirements
Instruments and equipment: Shahr hardness tester (type A, D)
Environmental conditions: the laboratory temperature is 23 C + + 2 C, the relative humidity is 60%~70231
Test method: the specimen thickness is at least 6mm. If the thickness of the sample is less than 6 mm, it can be stacked with no more than 3 layers of smooth, parallel samples with each layer thickness not less than 2 mm. The specimen must have enough area to make the needle and specimen contact position at least 12mm from the edge.
Place the specimen on a solid plane, hold the hardness tester, press the pin at least mm from the edge of the specimen, press the pin smoothly on the specimen, and read it within 3 seconds after the full contact of the pin with the specimen.
Results: the hardness values were measured 5 times at different locations of 6mm, and the median was taken.
Feilong Jiangli will update the more inspection rules for automobile rubber parts
By 袁春凤 (Tiffany)
Rubber shock absorber for automobiles
With the development of social economy, the automobile industry at home and abroad is facing a period of rapid change, which is characterized by further improving the service life of the automobile under the premise of ensuring driving safety, riding comfort, high speed and luxury. Damping products are used to control the vibration and noise of automobiles and to improve their handling stability. They are generally placed in the engine frame, rod holder, suspension shaft lining, center bearing bracket, bump limiter and torsional vibration absorber to improve the safety and comfort of automobiles. Damping products can be divided into four categories: bracket type, shaft lining type, buffer type and damping type. The main requirements of damping, heat resistance and fatigue resistance are good. Automobile shock absorber rubber products include engine bearings, suspension components, rubber springs, rubber air springs and impact rubber protective parts. In recent years, in order to improve the safety, comfort and maneuverability of automobiles, the variety and quantity of shock absorber rubber products for automobiles are increasing as the number of shock absorber rubber products on a car has reached 50-60 pieces.