Silicone O-ring is a rubber ring made of silica gel with a circular cross-section. Because of its O-shaped cross-section, it is called a silicone O-ring. It has been widely used in machine tools, ships, automobiles, and aviation. Aerospace equipment, metallurgical machinery, chemical machinery, engineering machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery, and various instruments and meters.

In the production process of O-rings for silicone products, sometimes some difficult problems will be encountered, such as the silicone O-rings are not connected after being formed. The following is the silicone products made by Best Liquid Silicone Products Factory. Reasons and solutions for the discontinuity of the O-ring after forming.

1. The mold temperature is too low

If the mold temperature is too low, it will cause the problem that the silicone O-ring is not connected after forming. The solution is to properly adjust the temperature of the upper and lower molds of the vulcanizer.

2. Excessive pressure

If the pressure is too high, the silicone O-ring will not be connected after forming, so the solution during the operation is to increase the amount of rubber, and then reduce the pressure.

3. Too little glue

If there is too little rubber, it can generally be solved by adding more rubber, but there will be a false impression that adding more rubber will increase the size of the product. In fact, the size reduction is not completely solved by reducing the material, but the size of the product can also be reduced by reducing the pressure and increasing the mold temperature.

4. The self-disassembly of the mold is too sharp

The mold can be taken for sandblasting, which is equivalent to polishing the self-disassembly opening of the mold. But it is best not to do this, because this is a set of silicone sealing ring molds, which have very high requirements for self-disassembly of the mold. The silicone molding mold will be worn out during continuous use. It is difficult to remove the edge.

To sum up, the silicone O-ring is a very widely used silicone product. The most common reason for the silicone O-ring to be disconnected after molding is that the burr is too thin, followed by the mold temperature during the production process, It is caused by other factors such as pressure, too little rubber, etc. Therefore, it is recommended that during the manufacturing process of the silicone O-ring, if you encounter the problem that the silicone O-ring is not connected after forming, it should be solved according to the actual situation, do not deal with it blindly, and finally The loss of money also has an impact on production efficiency.

The O-ring seal has its own sealing effect and does not need to be periodically adjusted. When used for sliding sealing, the sealing performance can not be affected by the direction of movement. It is small in size and easy to use, but it is inevitable that there will be leakage. The following is Beizhite liquid silicone will explain the reasons for the leakage of O-rings.

1. There are gaps on the surface of the product, which are caused by two reasons: product size deviation or mold size deviation.

Second, the bearing capacity cannot reach the shock absorption and buffering effect, that is to say, the lack of toughness of the material is related to the temperature and time during molding.

3. The main reasons for raw materials are aging rate, elongation rate, and hardness. Finally, it is the influence of the environment. Different environments will have different oxidation reactions on the product, and problems will begin to appear after a long time!

Flow marks and burrs of silicone O-rings

The reasons for the flow marks and burrs of the silicone O-ring, determine the silicone raw materials and related additives, such as: Is the silicone ordinary silicone or platinum vulcanized silicone? Is the colorant or pre-dispersion used for the masterbatch?

Because flow marks are related to silica gel mixing, lowering the mold temperature and fully mixing can reduce or eliminate flow marks.

The reason for the burr problem:

1. The weight of the material is too large; 2. Exhaust too many times, the mold temperature is high, etc.

Solution: The joint line of the mold needs to be polished with oil stone; add frozen trimming, etc.