Gravity Die Casting Gravity Die Casting Gravity Die Casting

Precision Gravity Die Casting foundry for High-Quality Castings

Conex Casting offers a host of parts made on our Gravity Die casting (GDC) machines. Aluminium Gravity Die Casting (GDC) is a permanent mold casting process used to manufacture high-quality, precision-engineered Aluminium parts. Unlike pressure die casting, gravity die casting relies on the natural force of gravity to fill the mold, resulting in denser, stronger, and more dimensionally accurate castings.

We specialize in custom aluminium GDC solutions, offering high-precision castings for automotive, aerospace, electrical, industrial, and marine applications. With our state-of-the-art casting facilities, we ensure superior quality, excellent surface finish, and cost-effective production.

What is Aluminium Gravity Die Casting (GDC)?

Gravity Die Casting is a metal casting process where molten aluminium is poured into a steel or cast iron mold (die) under gravity without external pressure. The molten metal fills the cavity and solidifies, forming a high-strength aluminium part. The use of reusable molds makes GDC efficient for medium-to-high-volume production.

Key Advantages of Gravity Die Casting:

✔ Higher Strength & Density – Produces denser, stronger parts compared to sand casting.
✔ Superior Surface Finish – Requires less post-processing, reducing costs.
✔ Dimensional Accuracy – Provides tighter tolerances and better repeatability.
✔ Suitable for Complex Shapes – Ideal for thin-walled and detailed parts.
✔ Better Heat & Corrosion Resistance – Ideal for automotive, marine, and industrial applications.

Aluminium Gravity Die Casting Process

The GDC process involves six key steps:

1. Die Preparation

  • The permanent steel mold (die) is preheated and coated with a graphite or ceramic release agent to ensure easy part ejection and longer mold life.

2. Molten Aluminium Pouring

  • High-quality molten aluminium alloy is poured into the mold cavity under gravity.
  • Pouring is done manually or via automated ladles to ensure precise filling and minimal turbulence.

3. Solidification & Cooling

  • The aluminium cools and solidifies inside the mold, forming the desired shape.
  • Proper cooling reduces internal stresses and improves metallurgical properties.

4. Ejection of Cast Component

  • The mold is opened, and the casting is removed using an ejector mechanism.
  • The solidified aluminium part is now ready for trimming and finishing.

5. Trimming & Removal of Excess Material

  • Sprues, runners, and flash (excess material) are removed using mechanical trimming or machining.
  • This ensures clean edges and precise dimensions.

6. Surface Finishing & Quality Inspection

  • The final part undergoes various finishing processes (sandblasting, machining, anodizing).
  • Each casting is inspected for defects, porosity, and dimensional accuracy before dispatch.

Common Aluminium Gravity Die Cast Parts

GDC is widely used in manufacturing lightweight, high-strength components for multiple industries. Some typical parts include:

  • Automotive Components: Engine blocks, cylinder heads, transmission housings, wheel hubs.
  • Aerospace & Defense: Aircraft brackets, structural components, fuel system parts.
  • Electrical & Electronics: Heat sinks, switchgear components, enclosures, connectors.
  • Industrial Machinery: Pump housings, hydraulic components, compressor bodies.
  • Marine & Shipbuilding: Corrosion-resistant deck fittings, marine pump casings.
  • Medical Equipment: Diagnostic machine frames, instrument casings.
  • General Engineering: High-precision brackets, mounting plates, mechanical supports.

Size & Weight Capabilities of Aluminium GDC Components

We offer custom casting solutions for a wide range of part sizes and weights:

Component Type Weight Range
Small Parts (Connectors, Fittings) 50g – 1kg
Medium-Sized Components (Pump Housings, Engine Brackets) 1kg – 15kg
Large Castings (Transmission Cases, Structural Frames) 15kg – 50kg+
Maximum Size Capacity Up to 1000mm in length

Our advanced die-casting technology ensures high repeatability and dimensional stability, even for complex geometries.

Aluminium Grades Used in Gravity Die Casting

We manufacture GDC components using high-quality aluminium alloys that provide excellent mechanical properties, corrosion resistance, and wear resistance.

Alloy Properties & Applications
LM6 (A356, AlSi12) Excellent corrosion resistance, ideal for marine and automotive parts.
LM9 (AlSi10Mg) Good machinability, used in aerospace and general engineering.
LM25 (AlSi7Mg) High strength, used in automotive structural components.
AlSi9Cu3 (A319) Wear-resistant, ideal for engine parts.
AlSi12Cu (ADC3) High thermal conductivity, used in heat sinks and electrical enclosures.

Our team can recommend the best alloy based on application requirements, mechanical properties, and cost considerations.

Industries We Serve

We provide high-quality Aluminium GDC parts to a wide range of industries, ensuring precision, durability, and cost-effectiveness.

Industries Catered To:

  •  Automotive – Engine parts, gearbox housings, transmission cases.
  •  Aerospace – Aircraft structural components, fuel system parts.
  •  Electrical & Electronics – Switchgear enclosures, heat sinks.
  •  Industrial Equipment – Compressors, pumps, hydraulic housings.
  • Marine – Saltwater-resistant deck fittings, marine pumps.
  • Medical Equipment – Imaging machine casings, precision parts.

Our expertise in customized aluminium casting solutions enables us to cater to specialized and high-precision applications.

Finishing & Post-Processing

After casting, finishing operations improve surface quality, mechanical properties, and performance.

Common Finishing Methods for GDC Components:

  • Shot Blasting / Sand Blasting – Removes surface oxides and improves texture.
  • CNC Machining – Achieves tight tolerances and smooth surfaces.
  • Anodizing & Electroplating – Enhances corrosion resistance and aesthetics.
  • Powder Coating & Painting – Provides additional protection and color options.
  • Heat Treatment (T6 Hardening) – Improves mechanical strength and wear resistance.
  • Leak Testing & Pressure Testing – Ensures airtight, high-pressure resistance.

We ensure that all castings meet the highest industry standards for performance, durability, and surface quality.

Why Choose Us for Aluminium Gravity Die Casting?

  • State-of-the-Art Foundry – Advanced casting facilities with automated pouring.
  • High-Quality Castings – Precision-engineered to meet international standards.
  • Custom Design & Engineering Support – Tailored solutions for unique project needs.
  • Competitive Pricing – Cost-effective production for medium to high volumes.
  • Fast Turnaround & On-Time Delivery – Efficient manufacturing & supply chain management
  •  trict Quality Control & Inspection – Every casting undergoes rigorous testing.

We also offer following Brass-Bronze castings for various industries-

Copper-Based Alloys (Brass & Bronze) for Gravity Die catsing

  • Brass (Cu-Zn Alloys)
    • Common grades: C36000, C37700, C46400 (Naval Brass), C68700 (Aluminium Brass).
    • Applications: Plumbing, valves, fittings, electrical components, marine hardware.
  • Bronze (Cu-Sn Alloys)
    • Common grades: C90300, C90500, C90700 (Phosphor Bronze), C95500 (Aluminium Bronze).
    • Applications: Bearings, bushings, gears, pump parts, electrical terminals.
  • Silicon Bronze (Cu-Si Alloys)
    • Common grades: C87300, C87600.
    • Applications: Architectural hardware, marine fittings, electrical contacts.

Get Custom Aluminum Gravity Die Castings – Contact Us Today!

Looking for a trusted Aluminum GDC (gravity Die casting) manufacturer? We provide custom casting solutions, bulk production, and prototyping for global clients.