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The process of creating a casting using green sand begins with the preparation of the sand mixture. The sand is thoroughly mixed with clay and water until it reaches a malleable consistency. Once prepared, a pattern—often made from metal or wood—is pressed into the sand to create a mold cavity. The two halves of the mold are then assembled, and molten iron is poured into the cavity. After cooling, the mold is broken away, revealing the cast iron part.

Plastic stamping is a manufacturing process used to shape and cut plastic materials into desired forms using dies and presses. This technique is analogous to metal stamping, where sheets of metal are shaped and cut. However, in plastic stamping, thermoplastics or thermosetting plastics are employed, which can be molded under heat and pressure into intricate forms.

China's stamping parts industry has witnessed robust growth over the past few decades. This success can be attributed to several factors. First and foremost is the country’s vast workforce, which provides a significant advantage in terms of labor costs. This economic benefit allows manufacturers to produce high volumes of parts without incurring exorbitant production costs.

The automotive industry heavily relies on sand-cast engine blocks due to the demanding performance characteristics required in modern vehicles. Manufacturers often utilize aluminum for engine blocks to minimize weight while maintaining strength. Aluminum alloys, such as A356, are particularly favored for their excellent casting characteristics and high strength-to-weight ratio. Iron is another popular choice, known for its durability and resistance to wear, making it suitable for heavy-duty applications.

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