Introduction and Application Scope of Gravity Casting
Introduction
Gravity casting is a traditional metal casting process that relies on Earth’s gravity to slowly pour molten metal from the top of the mold into the cavity, achieving the formation of the casting. The process typically uses permanent molds (such as metal molds) or sand molds, including melting, pouring, cooling, and demolding. Unlike high-pressure casting, gravity casting has a slower filling speed, avoiding pores and inclusion defects caused by turbulence, thereby obtaining a dense and uniform casting structure. It is particularly suitable for non-ferrous metals such as aluminum alloys, copper alloys, and magnesium alloys, with castings exhibiting good mechanical properties and surface finish. The process is simple and low-cost but has moderate production efficiency, suitable for small to medium batch production.Application ScopeGravity casting is widely used in the production of castings requiring high strength and complex shapes, mainly including:
- Automotive Manufacturing: Engine cylinder blocks, cylinder heads, wheel hubs, transmission housings, and other structural parts, leveraging their high density and fatigue resistance.
- Aerospace: Lightweight alloy components, such as aircraft brackets and structural parts, emphasizing weight reduction and reliability.
- Electrical and Mechanical Equipment: Motor housings, pump bodies, and gearboxes, suitable for medium-sized precision parts.
- Others: Architectural hardware, artistic castings, and consumer products (such as bicycle frames), ideal for small to medium-sized castings with wall thicknesses of 2-10 mm (weights from hundreds of grams to tens of kilograms), with production batches of dozens of pieces per hour.