Gravity casting involves pouring molten metal into a mold using the natural force of gravity. This process, also referred to as "casting," encompasses various methods such as sand casting, metal casting, investment casting, and mud casting.
In a narrower sense, gravity casting specifically refers to metal casting. Here, we focus on its key benefits and limitations.
Gravity casting molds are reusable, offering long lifespans and high production efficiency. This method delivers castings with excellent dimensional accuracy, smooth surfaces, and robust strength, comparable to those made with sand molds.
Despite its benefits, gravity casting comes with higher costs due to the heat-resistant alloy and intricate hollow cavity processing required for mold production. These high manufacturing expenses make small-batch production less cost-effective, as the per-unit cost becomes significantly higher.
Gravity casting remains a popular choice for high-volume manufacturing, balancing quality and efficiency against initial investment.