Introduction: Unlimited 3D Shape Freedom
For metal parts that require thick 3D shapes, hollow cutouts, or mounting pegs on the back, zinc alloy die casting is the ultimate choice.
Instead of bending flat sheets, this process melts solid zinc alloy and injects liquid metal into precise steel molds under extreme pressure. Therefore, you get high-density metal parts with complete design freedom.
How Die Casting Works
Die casting follows a fast thermal cycle:
- First, solid zinc alloy melts inside a furnace at around 420°C
- Next, a powerful hydraulic piston forces liquid metal into a steel mold within seconds.
- Then, the metal cools and solidifies rapidly inside the mold water channels.
- Finally, automatic pins push the hard metal part out for trimming and polishing.
Main Technical Advantages
- Solid Physical Weight: Creates dense, heavy metal parts that feel expensive and durable in hand.
- Built-in Mounting Studs: You can easily add threaded screw posts, hooks, or location pins directly onto the back.
- Complex 3D Shapes: Easily forms variable wall thicknesses, curved profiles, and hollow cutouts.
- Premium Plating Options: Accepts high-gloss chrome, real gold, antique bronze, and enamel color fills easily.
Quality Control Standards
- No Internal Air Bubbles: Vacuum systems remove air during injection. Therefore, surfaces stay smooth after mirror polishing.
- Plating Heat Test: Parts undergo heat tests to ensure electroplated layers never peel off during daily use.
- Rust Resistance: Multi-layer copper and chrome plating pass a 96-hour salt spray test easily.
Best Uses for Die Cast Parts
- Luxury Packaging: Heavy metal box latches, perfume bottle collars, and cream jar metal caps.
- Electronics and Hardware: Smart door lock plates, audio knobs, and heavy brand logos.
- Fashion Accessories: Belt buckles, handbag badges, and shoe hardware.
Easy Design Rules (DFM)
- Keep wall thickness fairly even (ideally 1.2mm to 2.5mm) to prevent surface shrinking marks.
- Add sloped angles to inner walls so parts slide out of the mold easily.
- Round the base of back mounting pins to increase structural strength.
Talk to Our Die Casting Specialists
Bring your complex 3D hardware concepts to life with Dongguan Zhangying Hardware & Plastic Product Co., Ltd. Send us your 3D files (STEP/IGES) for a free design review today!
