What are the general materials of O type rubber seals?

Rubber sealing plugs, it is recommended to consult caplugs, caplugs specializes in the production of various plastic and rubber products, with plastic and rubber products production process, all through ISO14001 and TS16949 certification, the company's product specifications are numerous, complete sizes, are widely used in automobiles, industrial machinery, hydraulics, electronics, communications, IT, nuclear power, electric power, medical and other industries, used to protect internal and external threads, nozzles, metal surface holes, spraying, painting and electroplating protection, etc. Most are in stock and ready for immediate shipping. It is recommended that you can ** consult it.

It depends on where you use the outer diameter is - tolerance, the inner diameter is + tolerance, the thickness is a little more for compression, the sealing ring is not very strict in practical application, and in some cases, you can't use it at all, you need to do it yourself, cut it according to the actual needs, or make it with special tooling, I hope it can help you.

Summary. O-ring is actually a kind of rubber ring, because it has a circular section and got its name, the role of the O-ring is to seal the effect, to prevent the leakage of liquid or gas, mainly used in mechanical parts, due to the different application environments, the requirements for the O-ring are different.

Pro, the O-ring material made of rubber is the best.

Butyl rubber, this kind of rubber has good heat resistance and air tightness, can resist the invasion of sunlight, polar solvents and ozone, and the insulation is also very good, can be exposed to oxide buckets or animal and vegetable oils, mainly used in vacuum equipment and chemical resistance air defection fingers, can not be used with petroleum, aromatic socks or kerosene.

O-ring is actually a kind of rubber ring this Yu, because it has a circular section and named, the role of the O-ring seal is to seal the effect, to prevent the leakage of liquid or gas, mainly used in mechanical parts, due to the different application environment of the socks and rocks, the requirements for the O-ring are different.

<> "There are many materials for the sealing ring, and it is necessary to understand it before selecting it, so as to facilitate later use. And what are the sealing ring materials?

1. HBR nitrile.

The range of use is relatively wide, commonly used in the medium of silicone oil, gasoline, water, silicone grease materials, the use temperature is minus 40 to 120 degrees, is a widely used sealing material. However, it is not suitable for polar solvents.

2. HNBR hydrogenated nitrile.

It is a kind of sealing material with corrosion resistance and crack resistance, which is suitable for use in automobile engines or washing machinery, and can bring good results. However, in the case of lipid, alcohol, or aromatic solvents, lipid seals should not be used.

3. SIL silicone rubber.

This is a sealing ring with cold-resistant, heat-resistant, anti-aging and other properties, and the insulation effect is also relatively strong, which is suitable for indoor electrical appliances, such as microwave ovens, water heaters, etc. However, it is not suitable for oils, concentrated acids, or concentrated solutions.

4. Viton fluorine rubber is a stool.

It has good weather resistance, ozone resistance, and chemical resistance, but it does not have cold resistance, and can be used in most oils and solvents, such as fuel systems, chemical plant seals, oil production engines, etc. The temperature used is generally between minus 20 and 250 degrees. In ketones, or low molecular weight lipids, it is not suitable for use.

5. Finch size FLS fluorosilicone rubber.

It is a material with good oil resistance, fuel oil resistance, and high and low temperature resistance, which can resist easy cleaning of chlorine and fragrances, and is often used in military applications, and the temperature used is between minus 50 and 200 degrees. Not suitable for use in ketones or brake gasoline.

What are the types of sealing ring materials, I will introduce them here, do you understand? There are many kinds of sealing ring materials, and the performance of each one is different, so it is necessary to choose it at the beginning, so as not to choose the wrong sealing ring, and the due effect cannot be achieved when used in the later stage, which will bring unnecessary trouble.

Good elasticity, long service life and good sealing effect; Poor quality has poor elasticity, easy breakage, poor sealing effect, and short service life.

O-rings are annular rubber seals with a circular cross-section. It is mainly used to prevent the leakage of liquid and gaseous media in mechanical parts under static conditions. In some cases.

O-rings can also be used as dynamic sealing elements for axial reciprocating motion and low-speed rotary motion. According to different conditions, different materials can be selected to adapt to it.

O-rings are usually selected as much as possible when choosing O-rings with large sections. In the case of the same clearance. The volume of the O-ring that is squeezed into the gap should be less than the maximum allowable value for which it is squeezed in.

1. Analysis of the use of D-type sealing rings.

D-type sealing ring is not easy to twist and twist damage in the process of reuse, and when it plays at low temperature, its contact pressure is larger than that of O-ring, not easy to gnaw, it is a rubber sealing ring with good self-sealing performance, and its type belongs to the special-shaped section O-ring, its mold is similar to the O-ring mold, and the parting surface is selected at the largest part of the arc.

2. Determination and design of mold structure.

1. Basic requirements for design.

To improve the quality of the product, to meet the requirements of appearance and dimensional accuracy, if the design of the sealing ring has a static sealing effect, then RA=, when dynamic sealing, RA<. 2. Do not damage the products of the assembly, disassembly, filling and taking out of the mold.

The mold is composed of three parts: upper and lower die and core, and is provided with an inclined plane guide groove for the die opening mouth, a core and the upper and lower die, and a bevel positioning for the core and the upper and lower die. There is an air running hole between the upper mold and the cavity, and the semicircular residual material groove with a radius of 2 is opened near the cavity part of the lower die, so as to ensure that the product is easy to take out, and the mold assembly and disassembly, and filler are convenient and easy to use.