What is an O-ring?

With the application of sealing technology more and more widely, the sealing ring is also one of the indispensable elements. Nowadays, many equipments have higher requirements for sealing, so there are many sealing elements, and the O-ring is a typical one. On behalf of, because of its excellent sealing performance and adaptability to various equipment, it is very popular with customers. O-ring design requirements, molding process and installation details.

Design Requirements

The shape of the O-ring is basically similar, it is circular, but when designing, the shape is only one of the factors, and the following requirements need to be considered:

1. Airtight seal

If the performance requirements of the seal are relatively high, the extrusion level will also increase simultaneously. When the extrusion level exceeds a certain extrusion level, other factors will intervene, such as stress.

2. The hardware pressure of cooperation

Once the extrusion is strengthened, it will cause compressive force. Excessive extrusion may damage the matching hardware. Therefore, when designing, it is necessary to select materials and hardware conditions.

3. Application friction and wear

Once the extrusion ratio is high, friction and wear will naturally increase, and friction and wear have a great impact on sealing performance, so application friction and wear need to be considered in the design.

4. Deformation

Once the sealing ring is deformed, it will inevitably lead to a decline in the performance of the sealing, so the deformation performance needs to be considered in the design.

Design requirements, molding process and installation details of O-rings

Forming process

When manufacturing this seal, the selected molding process is very important. The quality of molding is directly related to the quality. The following are the more commonly used molding processes:

1. Calendering

This molding process is made by pressing the compounded rubber through a calender. When pressing, there are requirements for thickness and width. It is suitable for the production of sealing rings with relatively simple shapes. The material of the sealing ring of some materials It contains textile fiber material, so a thin layer of glue needs to be applied on the fiber, and the glue application process usually needs to be completed on a calender.

2. Compression molding

The sealing ring with complex shape is produced by molding method. During production, it is necessary to use male and female molds to place the rubber compound in the mold for heating, and then rely on the shape of the mold to form.

3. Injection molding

This molding process is to put the plastic compounded rubber into the hopper of the extruder and rapidly form under the extrusion of the screw. Before extrusion, the rubber material should be preheated to make the It becomes relatively soft, so that it is convenient to obtain a sealing ring with precise dimensions and a smooth surface during extrusion. This process is suitable for sealing rings with complex shapes.

We only use sealing rings, mainly to make the equipment have a sealing effect. Therefore, when choosing sealing rings, we should choose products with reasonable design and reliable quality. In order to ensure the sealing effect, the installation must be in place.

Installation Details

The main function of the sealing ring is to seal, so if you want to obtain a good sealing effect, it is very important to install correctly. When installing, you need to pay attention to the following details:

1. If the sealing groove is too thin or too deep, the sealing ring cannot exceed the arc surface high after being loaded into the sealing groove. You can wrap a layer of cotton rope at the bottom of the sealing groove and apply waterproof calcium-based grease.

2. If the sealing groove is too thick or too shallow, the sealing ring will be much higher than the arc surface, it is easy to increase the difficulty of installation, and even the accessories will be squeezed out. It is possible to use gauze to polish the sealing groove.

3. If the thickness of the sealing groove is not uniform, it is necessary to check the sealing groove and replace the defective parts.

4. Before the sealing ring is put into the sealing groove, the sealing groove should be clear, and the impurities and dirt in it should be cleaned up. During installation, for the convenience of installation, some grease can be properly applied.

5. After the installation, it is necessary to check whether the sealing ring is deformed.

We have introduced the design requirements, molding process and installation details of the O-ring seal above. We only use the seal ring, mainly to make the equipment have a sealing effect. Therefore, when choosing the seal ring, you should choose For products with reasonable design and reliable quality, in order to ensure the sealing effect, the installation must be in place.