What to do if there are air bubbles after vulcanization of rubber
What should I do if there are bubbles in the rubber after vulcanization?
There are always some bubbles on the surface of the sample after vulcanization of rubber, with different sizes. After cutting, there are also a few bubbles in the middle of the sample.
Analysis of the causes of bubbles on the surface of rubber products
1. The rubber mixing is uneven, and the operators are not standardized.
2. The rubber film is not parked properly, the environment is unsanitary, and the management is not standardized.
3. The material has moisture (add some calcium oxide when mixing)
4. The vulcanization is insufficient, and it looks like there are bubbles when it is not cooked.
5. Insufficient vulcanization pressure.
6. There are many impurities in the vulcanizing agent, the impurities of small molecules are decomposed in advance, and the bubbles remain in the product
7. The exhaust design of the mold itself is unreasonable
8. If the product is too thick, the heat transfer of the rubber is slow. After the surface is vulcanized, the fluidity of the rubber decreases, resulting in a shortage of materials, so bubbles may be generated.
Solution: Improve vulcanization pressure and time
1. Extend vulcanization time or increase vulcanization speed
2. Increase the number of exhausts during vulcanization
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