Solution for bubble formation in flip mold silicone products
Situation description: When using flip mold silicone, bubbles may appear inside or on the surface of the cured silicone product. What is the cause of the bubbles and how can they be resolved.
Situation analysis: ① The main reason for the existence of bubbles is that no vacuum equipment was used. Of course, not all operators have such equipment, so there may be some degree of bubble problem during the operation process. ② In the absence of vacuum pumping equipment, try to slow down the speed during mixing and mold filling, which will result in more bubbles being released. If the mold is filled quickly, bubbles will accumulate and the bubble release speed will be slow The operation time of flipping the silicone gel is modulated too quickly, causing it to solidify and form before the foam is fully discharged.
Solution: If conditions permit, vacuum equipment can be used to perfectly eliminate bubble problems, and no bubbles will be seen after solidification; Choose the silicone gel with longer operation time, and slow down the injection speed when filling the mold. The bubbles will be completely eliminated before fully curing. There is also a situation where the mold type is not conducive to bubble removal and may result in the presence of bubbles inside or on the surface.