Custom Gravity Die Casting Services
As a leading gravity die casting factory, we provide high-precision manufacturing solutions for industries requiring superior mechanical strength and structural integrity. Our custom gravity die casting (GDC) services are ideal for aluminum and copper-based alloys, offering a perfect balance between cost-effective tooling and excellent surface finish. Unlike high-pressure methods, our gravity casting process allows for T6 heat treatment, ensuring your components achieve maximum durability and pressure-tightness.
±0.01mm
Tolerance
20+
Years Experience
20 Day
Die Casting Samples Delivered
Certifications
ISO 9001 & IATF 16949
What Is Gravity Die Casting?
Gravity Die Casting (GDC), also known as permanent mold casting, involves pouring molten metal—typically aluminum, zinc, or copper—from a vessel into a metallic mold under the force of gravity alone. Unlike HPDC, this process ensures lower turbulence and allows for T6 heat treatment, making it the ideal choice for high-strength, structural industrial components.
How Gravity Die Casting Works
Gravity Die Casting uses the natural force of gravity (instead of high pressure) to fill a permanent steel mold with molten metal. This ensures a stable, smooth filling process.
The 4-Step Process
Preparation: The steel mold is pre-heated and coated with a protective lubricant.
Pouring: Molten metal is poured into the mold. Gravity pulls the liquid down to fill every cavity.
Cooling: The metal solidifies quickly within the steel die, creating a dense and fine-grained structure.
Ejection: The mold opens, and the high-strength, near-net-shape part is removed.
Advantages of GDC
Superior Mechanical Properties
The fast cooling rate of the steel mold creates a fine-grained structure. Parts are heat-treatable (T6) to achieve maximum strength and durability.
Lower Tooling Costs
Compared to High Pressure Die Casting (HPDC), GDC molds are significantly more affordable, making it the best choice for low-to-medium volume orders.
High Internal Density
The laminar (smooth) filling process minimizes air entrapment, producing pressure-tight parts with nearly zero porosity.
Design Flexibility with Cores
GDC allows the use of sand cores, enabling the creation of complex internal cavities and undercuts that are impossible in HPDC.
Excellent Surface Finish:
Provides a much smoother surface and higher dimensional accuracy than traditional sand casting, reducing the need for secondary finishing.
Material Versatility
Highly effective for Aluminum and Copper-based alloys (Brass/Bronze), ensuring long-lasting performance in demanding environments.
GDC Applications Across Industries
Choosing Gravity Die Casting offers a strategic balance between cost, speed, and part performance, especially for mid-volume production.
Automotive: Engine cylinder heads, intake manifolds, brake calipers, steering knuckles, and pistons.
Industrial Equipment: High-pressure valve bodies, pump housings, compressor parts, and hydraulic manifolds.
Renewable Energy: Heat sinks for solar inverters, wind turbine housings, and power grid connectors.
Railway & Transport: Gearbox housings, suspension brackets, and braking system components.
Fluid Handling: Water pump impellers, heavy-duty pipe fittings, and gas meter housings.
Marine & Defense: Corrosion-resistant propeller components, engine mounts, and structural hardware.
Quality Assurance & Testing
Spectrographic Analysis: Every batch of molten metal is tested to ensure the chemical composition (Aluminum or Copper alloys) precisely matches your material specifications.
T6 Heat Treatment Control: We specialize in T6 tempering, monitoring temperature and quenching cycles to maximize the hardness and tensile strength of your parts.
X-Ray Flaw Detection: Our non-destructive testing (NDT) identifies internal defects like shrinkage or gas inclusions, ensuring 100% internal integrity.
Pressure Leak Testing: For manifolds, valves, and pump housings, we perform underwater or air-pressure leak tests to guarantee superior pressure-tightness.
CMM Dimensional Inspection: Using Coordinate Measuring Machines (CMM), we verify that all critical dimensions and tolerances adhere to your engineering drawings.
Surface Finish Audit: We ensure that all parts undergo thorough deburring, shot blasting, or machining to meet your specified surface roughness (Ra) requirements.
Other Die Casting Metals Services You May Looking for
FAQ: Gravity Die Casting (GDC)
GDC is ideal for parts requiring high mechanical strength and structural integrity. Unlike High Pressure Die Casting (HPDC), GDC allows for T6 heat treatment, which significantly enhances the part's durability. Additionally, GDC has much lower tooling costs, making it perfect for low-to-medium volume production.
Yes. Because the molten metal fills the mold slowly under natural gravity (laminar flow), there is minimal air entrapment compared to high-speed injection. This results in a high-density structure that is pressure-tight, making it the industry standard for pumps, valves, and manifolds.
Our factory primarily works with Aluminum alloys (such as A356 and A380) and Copper-based alloys (Brass and Bronze). The rapid cooling provided by the steel molds creates a fine-grain structure, which improves the overall wear resistance and strength of these materials.
Absolutely. One of the biggest advantages of GDC is the ability to use sand cores. This allows us to create intricate internal cavities and undercuts that are technically impossible or too expensive to achieve with other die casting methods.
GDC tooling is significantly more affordable than HPDC molds because the dies do not have to withstand extreme injection pressures. For projects with annual volumes between 500 and 10,000 pieces, GDC offers the best return on investment (ROI).
We implement a multi-stage QC process, including X-ray flaw detection to identify internal shrinkage and leak testing to ensure 100% pressure-tightness. We also provide spectrographic analysis reports to verify the chemical composition of every batch.