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In the foundry industry, large amounts of sand are used in the casting process, especially in sand casting and core making. After multiple production cycles, the used sand becomes waste foundry sand, which must be treated or recycled.

If waste sand is not properly recycled, it can cause environmental pollution and increase production costs for foundries.

Therefore, many modern foundries are investing in sand recycling systems to improve sustainability and efficiency.

Shrinkage defects are one of the most common quality problems in the metal casting industry. They often appear as cavities or porous areas inside castings, which can significantly reduce the mechanical strength and reliability of the final product.

Shrinkage defects may occur during the solidification process when molten metal contracts and insufficient metal is supplied to compensate for the volume reduction.

Understanding the causes of shrinkage and applying the correct casting techniques can effectively reduce or eliminate these defects.

With the rapid development of modern manufacturing, industries such as automotive, aerospace, sanitary hardware, and industrial equipment are demanding higher precision, better surface quality, and more stable production efficiency. As a result, high-precision casting technologies are becoming increasingly important in the global foundry industry.

Advanced casting processes and automated equipment are helping manufacturers produce complex metal components with tighter tolerances and fewer defects.

In metal casting, inclusions refer to unwanted impurities trapped inside the casting during the solidification process.

These impurities may include:

• Slag particles
• Oxides
• Sand residues
• Non-metallic impurities

Inclusions can significantly affect the mechanical strength, surface quality, and reliability of cast components.

Low Pressure Die Casting (LPDC) is an advanced casting process in which molten metal is pushed into a mold using controlled low pressure gas.

Unlike traditional gravity casting, LPDC relies heavily on precise pressure control to regulate the metal flow and filling speed.

Proper pressure control is essential because it directly influences:

• Metal filling stability
• Casting density
• Surface quality
• Defect formation