Cycle Time in Die Casting: What Affects It and How We Optimize It

In high-pressure die casting (HPDC), cycle time is the total duration needed to complete one casting operation—from die closing to part ejection. It directly impacts productivity, machine efficiency, and part cost.

Many buyers overlook it—but for manufacturers, cycle time optimization is a game changer.

⏱️ Key Phases of the Die Casting Cycle:

1. Die Closing

   Time required to safely clamp the tool halves under high force.

2. Metal Injection (Filling Time)

   Usually between 0.01 to 0.3 seconds. Injection speed and gate design play a role.

3. Solidification (Cooling Time)

   The longest part of the cycle—typically 40–60% of total time. Influenced by wall thickness, cooling channel design, and alloy.

4. Die Opening + Ejection

   Includes ejection pin activation and clearance of the part from the die.

5. Die Spray & Lubrication

   Helps control heat and release but adds time. Spray cycles are optimized for critical areas only.

⚙️ What Affects Cycle Time?

• Part geometry & wall thickness

• Material type (aluminium vs zinc)

• Mold cooling efficiency

• Die temperature consistency

• Machine shot control system

At LVIO Precision, we carefully balance cooling efficiency, ejection timing, and spray cycles to achieve stable, repeatable shot times—typically ranging from 25 to 60 seconds per part, depending on size and alloy.