China Xiamen Juguangli Import & Export Co., Ltd Company News

The vulcanization process is that the molecular structure of rubber is more stable, and some of the original unsaturated chemical bonds have cross-linked reactions, so the saturation of vulcanized rubber is further increased, reducing the unsaturated chemical bonds that are prone to chemical reactions, and improving the corrosion resistance of common acid, alkali and salt, organic solvents and other substances.   Rubber products often require some post-treatment after vulcanization to become qualified finished products. This includes: ① The edge trimming of rubber mold products, so that the surface of the product is smooth and the outline size meets the requirements; ② After some special processing, such as the surface of the product treatment, so that the use of special purpose products have improved the performance; ③ Products containing fabric skeleton such as tape, tires and other products should be cooled under inflation pressure after hot tensile cooling and vulcanization to ensure the size, shape stability and good performance of the product.

1. Regularly check the insulation effect of each circuit and always pay attention to the warning content on the machine warning signs. 2. When the moving parts and mixing room are blocked, do not insert your hands or iron rods into them. Instead, use plastic rods to handle them carefully. 3. When in contact with high-temperature areas, be careful not to get burned.   4. When there is powder leakage or a screaming sound from the sealing ring, first loosen the four screw caps evenly and then screw in some more. Then add some material oil or engine oil to the gap of the rotor in the mixing chamber, and idle for 3-5 minutes. At the same time, gently tap the sealing ring cover around the spring edge with a hammer a few times. If there is still powder leakage, adjust the tightness of individual springs. If the sealing ring cover is very close to the side plate water tank of the mixing chamber, it indicates that the sealing ring inside has worn out and needs to be replaced. The method for replacing the sealing ring is shown in the manual. 5. Special attention: Before starting the machine every day, check the oil level and lubrication status of each gear oil, engine oil, and butter. Pay close attention every day to ensure that the oil level in the triplet oil cup is not less than half, and regularly observe the changes in the triplet oil level. It is abnormal to not consume oil or consume oil too quickly (adjust the knob of the triplet). The gear oil of the new machine should be replaced no later than six months, and lubricating oil should be added to the moving parts at least once a week. When adding oil, it should not exceed half of the oil mirror, otherwise oil leakage may occur. 6. When the machine malfunctions, stop the machine immediately and unrelated personnel are not allowed to take any action without authorization. Notify and wait for your company's maintenance personnel to inspect and repair.

Types of silicone sealing coils In a broad sense, silicone sealing coils are supporting parts of wiring equipment, also known as sealing sleeves or sealing rings. Although silicone sealed coils are an important part, they play an important role as a small supporting part. Very small, there are countless species in production and daily life. The type of silicone sealing coil is primarily classified based on material and appearance.   Silicone sealed coils are classified according to their raw materials: 1. PVC coil is primarily made of elastic PVC material. The sealing sleeve of the product is injection molded, and the end face has a clear interface, which has a certain impact on the appearance of the product. PVC rolls are more suitable for low-end products due to their low price and poor quality. Due to inability to meet job requirements, the product is no longer available. 2. Silicone sealed coils are made of silicone through high-temperature vulcanization. Silicone materials, due to their unique physical functions, determine the excellent functionality of silicone sealing coil products, both in terms of appearance and physical function, making them the best choice for producing silicone sealing coil products. There are many types of silicone materials used in the production of silicone maintenance coils. The commonly used ones now include natural rubber, nitrile rubber, fluororubber, and silicone rubber. Customers can customize silicone sealing coils with different rubber materials according to their product requirements to meet the requirements of the application environment.

The common material of the car dust cover is silicone rubber, and the car rubber dust cover generally has the outer rubber dust cover (CVJ rubber dust cover) and the internal test rubber dust cover, the shape is basically into the corrugated pipe shape (as shown in the following figure), CVJ rubber dust cover is used to protect the car drive shaft rubber parts; It can be imagined that the rubber dust cover is very important to the car.   Is it really reliable to use TPE-E instead of rubber CVJ dust cover? At present, the CVJ rubber dust cover is widely used because: it can adapt to harsh environments, such as: it can maintain the original compressive elasticity at extreme temperatures of -40 degrees Celsius; There will be no qualitative change in the extremely corrosive environment such as oil, sand, dirt, and exhaust, so as to achieve normal and safe driving under various turning and braking conditions of the car.   Although the TPE-E replacement of CVJ rubber dust cover reduces the cost to a certain extent (by reducing the size of the bellow, that is, reducing the use of materials to reduce the cost), it is also worth mentioning that the composition of the automobile drive shaft assembly is mainly steel parts and dust cover, in order to reduce the cost must take into account the cost of lubricating materials. However, the use of TPE-E will use the bellows to become larger, if the size of the bellows is reduced, coupled with the dust cover of TPE-E material has resistance to the grease, so that the grease is not easy to pass, resulting in the possibility of failure. Secondly, the corrosion resistance of CVJ rubber dust cover is beyond the reach of TPE-E. For rubber dust cover, it has poor blocking performance of grease, and the grease inside can quickly pass through the dust cover, and play a lubricating role on the surface.   To sum up, The importance of rubber dust cover for the car is to choose the lubricant suitable for the rubber dust cover, so that the surface is lubricated, and choose the material suitable for the car dust cover, this problem still needs to be improved.

The shortcomings and shortcomings of EPDM rubber are as follows:   1. Adhesive side Although ethylene propylene rubber has become the most widely used elastomer in the field of non-tire products, it still cannot play a role in the production of tire products. The reason is that as long as the self-viscosity and mutual viscosity of ethylene propylene rubber is poor, it is easy to cause tire delamination. This problem is also one of the biggest problems in the application of ethylene propylene rubber.   2. The price of raw rubber At the beginning of the birth of ethylene propylene rubber, rubber people have given high hopes, because of its low monomer makes some people predict that it will become the largest amount of rubber, the lowest cost rubber. But today, the price of ethylene propylene rubber raw rubber is still higher than originally expected, and belongs to the higher of its large synthetic rubber (although its price is lower than nitrile rubber and neoprene rubber, but higher than styrene butadiene rubber, butadiene rubber, isoamyl rubber and butyl rubber).   3. Curing rate Binary ethylene-propylene rubber molecular chains are fully saturated and do not contain highly active double bonds, so so far it is still unable to be cross-linked by sulfur vulcanization, and can only be vulcanized by peroxides with slower vulcanization, thus limiting the application of this valuable elastomer.   4. Other aspects The flame retardant, oil resistance and air tightness of ethylene propylene rubber are also poor. Therefore, ethylene propylene rubber can not be used alone in mineral oil, hydrocarbon solvent products; When used for flame retardant products, it is also necessary to add more flame retardant fillers than other elastomers, so the cost is higher and the flame retardant effect is poor; When combined with butyl rubber and used as an inner tube, the air tightness of the butyl rubber inner tube will be partially reduced, so the use is limited.

If you want to change the size of tempered glass because of the change of use, many people want to know how to cut. So, can the tempered glass be cut again? What is the cutting step of glass, and how to cut correctly can have good results.   Can tempered glass be cut?   1, once the tempered glass is completed, it can not be cut, drilled or formed. This is because tempered glass is specifically designed to distribute pressure and will crack and break if the tension inside the glass breaks. Therefore, any tempered glass unit must be cut to size and shape before the toughening process can take place.   2, if the float glass is broken, it will break very sharp, dangerous glass fragments. However, the process of toughening creates tension within and on the surface of the glass panel to increase its strength and durability. This also ensures that if the glass breaks, small, harmless pieces of glass will be broken.   What are the steps for cutting glass?   1. Prepare the workspace. You need a large flat table that is too hard to scratch this piece of glass. Work area should be easy to clean. Because of the possibility of glass fragments, it is best to avoid working on the carpet. To keep pets safe and children safe, make sure work areas and materials are kept away from them. Clean the surface of the glass you are going to cut. Any stains and irregularities on the glass will prevent you from making scratches on it. Use a rag or your fingers to clean the area you want to scratch.   2. Prepare a glass cutting knife and some low viscosity oil. The glass cutter is about the same size as a pencil and uses a diamond or hard grinding wheel to scratch the glass, so that the glass can be divided along the scratch. You can buy cutting oil at a hardware store or use some kerosene.   3. Measure and mark where you want to scratch. The scratch must go from one edge to the other. You can mark the glass with a marker (or ruler if you're cutting straight lines). You can also mark with paper and lay the paper under the glass. The cutting length should not be too long. Scratches larger than 60 cm increase the risk of glass shattering. Make sure the scratch line leaves an edge of about 15cm on either side to allow room to grip. If you are cutting small pieces of glass, you may need special tools, such as pliers or a small hammer, to knock off glass that you cannot grasp with your hands.   4. Mark the glass, dip the cutter into the oil, and hold it like a pencil. The oiled glass cutter makes smooth lines. Make sure to check that the grinding wheel is aligned to your desired position and orientation. Calibrate. You can use a yardstick or a regular yardstick. You want to make sure the ruler is thick enough to prevent it from colliding with the grinding wheel on the cutting knife.   The above for you to introduce is whether the tempered glass can be cut, presumably people should already know it, what is the cutting step of tempered glass, please professional personnel to cut it will be better, at the same time for the choice of tempered glass, we must pay attention to the brand, in order to better ensure the quality, for tempered glass also to do maintenance, Can extend the service life.

Most materials can withstand the initial pressure, but will yield over time due to creep and relaxation. The reading of the hardness tester can be read immediately or after a specific delay time, usually 5 to 10 seconds. An instant reading will always show a higher (or harder) reading than a delayed reading. The delayed reading is more representative not only of the hardness of the material but also of its elasticity. A weaker, less elastic material is more prone to creep than those that are stronger and more elastic.   In order to ensure the validity of the data, it is necessary to have precise testing procedures. In order to obtain accurate readings, you must have a specimen with a flat surface and a thickness that prevents the indenter from being affected by the supporting surface. The required thickness is usually 0.200 inches, but for hard materials with less deformation, it can be tested accurately when the thickness is thinner.

Rubber materials, with their superior properties, are increasingly being approached by businesses, especially in terms of compression resistance, heat resistance, and so on. The special components contained in high-temperature resistant rubber can provide good performance in the power industry and also play an important role and trend. Low phenyl silicone rubber not only has unique cold resistance and low cost, but also is a type of low temperature resistance, widely used in the aerospace industry today. According to the different content of benzene, it can be divided into medium phenyl silicone rubber, high phenyl silicone rubber, and low phenyl silicone rubber. Due to the increase in phenyl content, the rigidity of high phenyl silicone rubber gradually increases, and its low-temperature resistance gradually decreases. However, to a certain extent, it improves the flame resistance and radiation resistance of the vulcanized rubber. And medium phenyl silicone rubber has good flame resistance and can automatically extinguish after ignition. This high-temperature resistant silicone rubber is one of the important materials for advanced technology, national economy, and aerospace industry. It can be made into various molded and extruded products for use as cold resistant rubber in the aviation industry. It can also be used for sealing rings, gaskets, pipes, and bars in radiation resistant parts, or in areas such as erosion resistance and heat aging resistance. So it's natural for people to come into contact with such products, and we also believe that rubber products will continue to progress and gradually enter thousands of households, making contributions to more industries. http://mao.ecer.com/test/siliconerubber-keypads.com/sale-22036759-shock-proof-and-shock-absorbing-silicone-rubber-feet-pad-for-washing-machine.html

General silicone rubber products and metal adhesion is not good, are required to be treated on the metal surface   1, metal surface treatment: In order to obtain the best bonding effect, the metal surface must be clean and pollution-free. With 200-400 micron steel sand or brown corundum for sandblasting treatment, until the metal surface is gray. Recommended products: Hardware bag rubber   2. After sandblasting, degreasing with solvent to remove grease. Cold rolled steel is usually treated with steel sand, stainless steel, aluminum, copper, etc., with brown corundum (aluminum oxide). Phosphating can also be used.   Summary: Make holes, knurls, grooves in the bonding area, and use adhesive Kemlock (dry for 20 to 30 minutes). About the adhesive coating process, I think everyone should be very clear, really do not know can go to ask about the use of Chemlock, their company will teach you to use the treatment agent and the use of methods.

Over the past few decades, the range of heat-resistant rubber products has been expanding, because:   First, some traditional products did not require heat resistance in the past, and with the change of use conditions, heat resistance requirements have been put forward. A classic example is tires. Due to the acceleration of the vehicle speed, the rolling heat generation rises sharply, and improving the heat resistance is the threshold that must be crossed. Other rubber products have a similar situation.   Second, the contact between rubber products and various thermal media (such as various lubricating oil, brake oil, working media and hydraulic oil) increases, and the temperature is also much higher than normal temperature.   Third, in order to comply with the heat resistance needs of the rubber industry itself in processing, such as tire vulcanization of water tires, capsules need to be used at a temperature of 170°C ~ 180°C for a long time, continuous vulcanization of extruded products must be carried out at a high temperature of more than 200°C, they must have heat resistance and anti-retrograde characteristics.   The formulation design of heat-resistant rubber involves the correct selection of the main material, vulcanization system, protection system and anti-retrograde agent, as well as the coordination between them.