Silicone O-shaped sealing ring is a kind of rubber ring with silicone as raw material and a circular cross-section. Because its cross-section is O-shaped, it is called silicone O-shaped sealing ring. It has been widely used in machine tools, ships, automobiles, aerospace equipment, metallurgical machinery, chemical machinery, construction machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery, and various instrumentation.

In the production process of O-shaped sealing rings for silicone products, some more difficult problems are sometimes encountered. For example, the silicone O-shaped sealing ring is not connected after forming. Below, Beizite Liquid silicone products Factory will share with you the reasons and solutions for the non-connection of the silicone O-shaped sealing ring after forming.

1. The mold temperature is too low

The mold temperature is too low, which will cause the silicone O-ring to not be connected after forming. The solution is to adjust the upper and lower mold temperature of the vulcanizing machine appropriately.

2. Excessive pressure

If the pressure is too high, the silicone O-ring will not be connected after forming, so the solution in the operation process is to increase the appropriate amount of rubber material, and secondly, there is a drop-point pressure.

3. Too little rubber material

If there is too little rubber material, generally increasing the rubber material can be solved, but there will be a sense of error that the additional material will make the product larger in size.In fact, reducing the size is not completely solved by reducing the material. It can also reduce the size of the product by reducing the pressure and increasing the mold temperature.

4. Self-disassembly of the mold is too sharp and sharp

The mold can be sandblasted, which is equivalent to a polishing of the mold's self-disassembly port.But it's best not to do this, because this is a set of silicone sealing ring molds, which require very high self-disassembly of the molds. The silicone forming molds will wear out during continuous use. If you deliberately sandblast and polish them, it will be difficult to remove the edges later.

In summary, silicone O-shaped sealing ring is a kind of silicone product that is extremely widely used. The most common cause of non-continuous silicone O-shaped sealing ring after forming is that the burrs are too thin, and secondly, there are other factors such as mold temperature, pressure, and too little rubber in the production process. Therefore, it is recommended that in the manufacturing process of silicone O-shaped sealing ring, the problem of non-continuous silicone O-shaped sealing ring after forming should be solved according to the actual situation, and should not be handled blindly. In the end, the loss of money will also affect production efficiency.

The O-ring has its own sealing effect and does not make periodic adjustments. When it is 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. Below, Beizite liquid silicone will explain the reasons for the leakage of the O-ring.

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

2. The bearing capacity cannot reach the shock absorption and cushioning effect, which means that the insufficient toughness of the material is related to the temperature and time during molding.

3. The main reasons for raw materials, aging rate, tensile rate, and hardness are several reasons, and finally the influence of the environment. Different environments will have different oxidation reactions to the product, and problems will begin to occur 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 the flow marks are related to silicone mixing, reducing the mold temperature and adequate mixing can reduce or eliminate the flow marks.

For the cause of the burr problem：

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

Solution: The binding line of the mold needs to be polished with oilstone; add frozen trimming, etc.