In glass bottles, air bubbles are a common problem, mainly those with a diameter of less than 1mm, and very large air bubbles occasionally appear. Glass bottle is a traditional beverage packaging container in my country, and glass is also a very historical packaging material. With many kinds of packaging materials flooding into the market, glass containers still occupy an important position in beverage packaging, which is inseparable from its packaging characteristics that cannot be replaced by other packaging materials.
In the fuenace, the temperature difference between the upper and lower parts of the glass liquid is small, the temperature at the lower part is relatively high, and the viscosity is relatively much lower. Therefore, the evacuation of bubbles in the glass is much easier. However, the absorption of bubbles is much more difficult, mainly because the solubility of the gas in the glass liquid is inversely proportional to the temperature. Therefore, when considering the problem of cleaning the bubbles in the glass, do not ignore the effect of the bubble absorption method, and take appropriate measures to reduce the melting temperature, improve the solubility of the gas in the glass liquid, and control the amount of material discharged, which can affect the appearance quality of glass products. The bubbles are absorbed by the glass liquid and cleaned up. Of course, it’s not that the lower the temperature, the better. When the temperature drops to a certain level, the problem will go to the opposite side. Not only will the bubbles not be relieved, but stones will also appear. In addition, the gas rate and melting rate should be properly controlled in glass production, and should not be too high. According to production experience, very large bubbles or epidermal bubbles generally have little to do with glass melting, and are mostly generated in the feeding process.
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