The following solutions can be used to solve the problem of bubbles during the vulcanization of liquid injection silicone:
Adjust the vulcanization temperature and time:
If the vulcanization temperature is too high or the time is too long, bubbles may form inside the silicone. Therefore, it is necessary to adjust the vulcanization temperature and time appropriately to ensure that they are within the appropriate range.
Improve the exhaust system:
During the injection molding process, if the exhaust system of the mold is not smooth, the gas will not be discharged smoothly, thus forming bubbles inside the silicone. Therefore, it is necessary to optimize the exhaust system of the mold to ensure that the gas can be discharged smoothly.
Increase the injection speed and pressure:
The appropriate injection speed and pressure help to fully fill the mold with silicone material and reduce the generation of bubbles. However, too high injection speed and pressure may also cause bubbles, so it is necessary to find a proper balance.
Degassing with a vacuum machine:
After the silicone material is mixed, a vacuum machine can be used for degassing to remove bubbles in the material. This is one of the effective means to prevent the generation of bubbles.
Check the quality of raw materials:
Moisture, impurities, etc. in the raw materials may cause bubbles. Therefore, it is necessary to ensure that the quality of the raw materials meets the requirements and to perform necessary drying and filtering before use.
Optimize the silicone formula: Some silicone formulas may be more prone to bubble formation. Therefore, you can try to adjust the silicone formula to reduce the generation of bubbles. For example, you can add some additives that can inhibit the generation of bubbles