Gravity Die Casting  Manufacturers, Traders, Suppliers

• brass
• gunmetal
• special brass
• tin bronze
• aluminium bronze
• aluminium nickel bronze

Gravity Die Casting is a casting process where liquid metal is poured into a metal mold under the action of gravity and solidifies in the mold to obtain a casting . The process is characterized by high thermal conductivity and heat capacity of the metal mold, which results in rapid cooling, dense casting structure, and mechanical properties about 15% higher than those of sand castings . This method can achieve high dimensional accuracy and low surface roughness, and the quality stability is good . However, metal molds lack permeability, so measures must be taken to evacuate the air and gases generated by the sand core. In addition, the metal mold has no yielding property, which can easily cause cracks in the casting during solidification.
It is suitable for mass production of complex-shaped aluminum alloy, magnesium alloy and other non-ferrous alloy castings, as well as steel and iron castings and ingots. It is widely used in industries such as automotive, aerospace, and electronics due to its ability to produce parts with high precision and quality.
In summary, Gravity Die Casting is an efficient and high-quality casting method suitable for mass production of complex parts. Its advantages include high mechanical properties, dimensional accuracy, and surface finish. However, it also has some limitations, such as the need for special measures to evacuate gases and the potential for cracking during solidification

Casting Parts refer to components manufactured by pouring molten metal or alloy into a pre-shaped mold, allowing it to cool and solidify, then removing the mold to obtain the final product. This process is widely used for producing complex geometries that are difficult or expensive to machine from solid materials.
Key characteristics of casting parts include:

• Versatility: Suitable for various materials (metals like iron, aluminum, steel, copper, and non-metals in some cases).
• Complex Shapes: Capable of forming intricate internal/external structures, thin walls, and hollow sections.
• Cost-Effectiveness: Economical for high-volume production and large components.
• Design Flexibility: Minimal limitations on part size, shape, and surface finish (depending on the casting process).

1. Casting ProcessesSand Casting:Uses sand molds (reusable or disposable) for low-cost, large-scale production of complex parts (e.g., engine blocks, valves).
Die Casting:High-pressure injection of molten metal into reusable metal dies, ideal for high-precision, thin-walled parts (e.g., automotive transmission components, electronic housings).
Investment Casting:Creates detailed, smooth-surface parts via a wax pattern and ceramic mold (e.g., aerospace turbine blades, medical implants).
Gravity Die Casting:Molten metal flows into a mold by gravity, suitable for medium-sized parts with moderate precision (e.g., aluminum wheels).
Centrifugal Casting）:Uses centrifugal force to form hollow parts (e.g., pipes, cylinder liners).
2. Materials
Ferrous Metals: Cast iron (gray, ductile), carbon steel, alloy steel (high-strength applications).
Non-Ferrous Metals: Aluminum alloys (lightweight, corrosion-resistant), copper alloys (conductivity), magnesium alloys (ultra-light), zinc alloys (high-pressure die casting).
Other Materials: Some polymers or ceramics for specialized non-metal casting.
3. Design Considerations
Wall Thickness: Uniform thickness to avoid shrinkage defects; minimum/maximum thickness based on material and process.
Draft Angle: Angles on vertical surfaces to facilitate mold removal.
Fillet/Radius: Rounded internal/external corners to reduce stress concentrations and improve mold filling.
Surface Finish: Dependent on mold type (e.g., sand casting yields rough surfaces; die casting offers smooth finishes).
4. Quality Control
Non-Destructive Testing (NDT): Radiography, ultrasonic testing, dye penetrant inspection for internal/external defects.Mechanical Testing: Tensile strength, hardness, impact resistance tests.
Heat Treatment: Annealing, quenching, or tempering to improve material properties.
Post-Processing: Machining, coating, or surface finishing to meet dimensional/functional requirements.

1. Automotive IndustryEngine components: Cylinder blocks, cylinder heads, crankshafts, transmission cases (sand/die casting).Chassis parts: Suspension brackets, wheel hubs (aluminum die casting for lightweighting).Brake systems: Calipers, rotors (cast iron for heat resistance).2. Aerospace & AviationTurbine blades and vanes (investment casting for high-temperature alloys like Inconel).Structural components: Wing brackets, engine mounts (magnesium/aluminum alloys for strength and weight reduction).Landing gear parts: Complex geometries requiring high reliability.
3. Energy & PowerIndustrial turbines: Generator housings, steam turbine components (steel/iron casting).Renewable energy: Wind turbine hubs, gearbox casings (large-scale sand casting for ductile iron).Oil & gas: Valves, pumps, and connectors (corrosion-resistant alloys like duplex stainless steel).
4. Industrial EquipmentHeavy machinery: Gearboxes, frames, and housings for construction/agricultural equipment (cast iron for durability).Pumps and valves: For water treatment, chemical processing (cast steel, bronze for corrosion resistance).
5. Consumer GoodsElectronics: Heat sinks, laptop/phone frames (aluminum die casting for thermal management).Hardware: Faucets, door handles (zinc/copper alloy die casting for aesthetics and cost).
6. Medical & DentalImplants: Hip/knee prosthetics, dental crowns (titanium investment casting for biocompatibility).Surgical instruments: High-precision components with smooth surfaces.
7. Construction & ArchitectureStructural elements: Ornamental ironwork, manhole covers (gray iron casting).Pipes and fittings: Ductile iron pipes for water/gas distribution.