MASTERING THE ART OF COMPRESSED AIR IN COLD BOX CORE MAKING

In July, we shared some important insights about the effects and variations in cold box core making and hope the insights have been beneficial and informative. In this issue, we will focus on compressed air and its role in quality core making. Despite environmental factors like dust, temperature, moisture, water, and pH levels that can impact core quality, you can still achieve superior core performance.

The importance of compressed air and its impact in the process:

Compressed air quality Moisture Control: High humidity in the compressed air can lead to increased moisture in the raw sand, which is problematic both during delivery and in-plant conveying.Binder Reaction: Moisture in the compressed air can react with binder components during the core shooting and gassing process. This can lead to incomplete or uneven curing of the cores, resulting in defects like weak spots or surface imperfections.Consistency: Variations in air quality, especially moisture levels, can result in inconsistencies in core strength and density.

Key Parameters to monitor Relative Humidity: The relative humidity of the compressed air needs to be carefully monitored and controlled.Dew Point: The dew point of the compressed air is another critical factor. A lower dew point indicates drier air, which is preferable in core making. Adjusting the dew point helps in preventing moisture-related problems.Pressure Levels: Fluctuations in pressure can lead to variations in the core shooting process, affecting the density and quality of the final product.
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Stay tuned for our next edition, where we’ll dive into everything you need to know about the importance of sand delivery in the cold box process.