Notes on the use of imported wear-resistant rubber balls
Fluororubber has excellent physical and chemical properties. It has high temperature resistance, oil and abrasion resistance, chemical corrosion resistance, and has good anti-aging and ozone resistance capabilities. And it can operate at a working temperature of 200 degrees C or below, allowing short time to run without oil. Even in very bad working conditions, it still has very good wear resistance. The rubber ball imported from the United States DuPont VITON material has more outstanding performance. The fluoro rubber is very stable and harmless when the normal working conditions and working temperature are below 220. But if you have a high temperature above 300 DEG, such as torch flame, fluorine rubber will release harmful gases. Inhaling these gases or entering the eye can cause damage to the health of the body. Therefore, the use of fluorine rubber seal must be careful not to exceed the normal use temperature.
Two. The imported wear-resistant rubber ball has many advantages and wide use.
Size: diameter * line diameter; the implementation of standards: American Standard, Japanese standard AS568 JIS2401-P JIS2401-G: NBR70 Black; material hardness; temperature limit: -40~120 degrees, -20~100 degrees; long-term performance characteristics: resilience and good sealing performance, wear resistant, oil resistant; stability in different medium work, and long service life.
Widely used in gas or liquid medium, it can be used for a long time in all kinds of static and dynamic environments. The rubber ball is usually installed in the groove of the outer circle or the inner circle which is rectangular in the groove. It is widely used in aerospace equipment, electronic and electrical appliances, agricultural machinery, sanitary ware, mining machinery, automobile, watch, ship and other industries.
Three. What is the advantage of selecting the imported wear-resistant rubber ball
1/: low cost is usually used together with other components in the finished product occupies the proportion of the cost is very low.
2/ very practical: has the advantages of simple structure, and the size and groove has formed a standardized installation or replacement or are very easy to operate.
3/ forms: static seal, dynamic seal rotary motion and axial reciprocating motion or motion (such as rotary reciprocating motion).
4/ for a variety of media: water, steam, oil, gas, pH, and other mixed media.
5/ material variety: according to different performance requirements, select the corresponding material, commonly used materials: hydrogenated nitrile rubber (HNBR), nitrile rubber (NBR) and fluorine rubber (FKM), silicone rubber (SIL), three Yuan Yibing (EPDM), chloroprene rubber, polyurethane rubber (CR) rubber (PU), polytetrafluoroethylene (PTFE), natural rubber (NR) etc..
The friction resistance of 6/ rubber ball is small and has self sealing effect.
7/ temperature in a wide range of uses, such as silica gel limit temperature is 60 DEG C - + 250 C. The pressure range of rubber ball with different hardness is 0-35Mpa; it is used with the reinforcement ring and the pressure is up to 1500Kg/cm2 when used for fixed use.
Four, after vulcanization of rubber ball and imported wear-resistant rubber ball
After being vulcanized, the seal can not immediately become a qualified product that can be sent to the customer. It will also be completed by some other corresponding work.
1) in order to meet the performance requirements of some characteristics, the surface of the product needs to be treated by a special process.
2) in order to ensure the stability and performance requirements of some products, it is necessary to cool the corresponding products by hot drawing and cooling after inflation.
3) in order to increase the aesthetic feeling of the product and improve the seal, the product needs to be trimmed.
An inevitable process flash or flash in the product forming, it is a delay in the curing product outflow mold parting surface and other parts, the formation of edge glue overflow.
1/ hand dressing: This is one of the earliest use of trimming method. This method requires a higher level of manual proficiency, and the quality of the product varies from person to person. Due to the use of scissors, scrapers and other tools to remove the edges, there are often scratches, scratches and deformations. In a word, the quality of the trimming of the product is not stable.
2/ mechanical dressing is a kind of trimming method for high efficiency and high quality.
A, low shot trimming
The trimming methods used in this process generally require high precision of the product. It is to rapidly cool the product to liquid nitrogen or dry ice to below the brittleness temperature, and then spew out metal pellets or plastic projectiles to break the flex and finish the trimming.
B, mechanical grinding and trimming
The trimming method is of low precision and is usually used for rubber balls with inner and outer circles. The cutting tool for grinding particles of certain thickness, so the surface of the product may be with residual sand effect
C, low temperature drum trimming
It is the friction between the impact force generated by the rotation of the drum and the products, has been frozen to brittle temperature following flash products break and fall off, the drum shape is octagonal, in order to increase the product impact force in the drum, the drum speed should be moderate, people can improve the efficiency of abrasives.
D, cutting and trimming punching machine
This method applies the product and its rubber edge can be put on the mold or the model product on the bottom of the punching knife. The punching is also divided into cold cutting and hot cutting.
F, low temperature vibration trimming
It is also known as vibration, freezing and trimming. The products do spiral vibration in the circular seal box. There is a strong impact between products and products and abrasives, resulting in the brittle edge of rubber crumble. Low temperature vibration trimming trimming drum than low temperature, low failure rate of products, the production efficiency is relatively high.
G, mechanical cutting trimming
It is suitable for the trimming of the larger dimensions, and the cutting tools are used.