Improved process to prevent air bubbles from appearing during construction of building fasteners
2025-07-23 09:25:25
During the manufacturing of building fasteners, bubbles can form in the production process, leading to rounded sand holes on the surface or inside the final product. These defects can compromise the structural integrity and overall quality of the fasteners. To enhance the brand image of construction fasteners, Defa Casting has invested in advanced technology and process improvements.
If you want to resolve this issue effectively, it’s essential to identify the root cause and apply targeted solutions. Here are the main reasons why air holes appear in construction fasteners:
1. The raw materials used in the furnace are wet, rusty, or oily, causing excessive gas content in the molten iron and severe oxidation.
2. The iron outlet, ladle, and refractory lining are not properly dried before casting, leading to moisture-related issues.
3. The pouring temperature is too low, preventing gases from escaping during the casting process.
4. A high aluminum content in the charge can lead to hydrogen porosity, which is a common problem in metal casting.
5. Poor gas permeability in the sand mold, combined with high moisture levels and excessive coal powder or organic matter, results in trapped gases that are difficult to release during pouring.
To prevent these defects and improve the yield of high-quality finished products, Defa Casting has optimized its production process and implemented strict quality control measures for both the raw materials and the molding sand. By addressing these factors, we ensure better performance and reliability of our construction fasteners.
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