1. What is Cycle Time in Injection Molding?

Cycle time in injection molding refers to the total time required to complete one full cycle of the injection molding process, from closing the mold to the next mold closure. It's a critical parameter for production planning and efficiency.

2. How is Cycle Time Calculated?

The calculator uses the following equation:

Where:

• Injection Time — Time required to inject molten plastic into the mold
• Cooling Time — Time required for the part to cool and solidify
• Ejection Time — Time required to eject the part from the mold

Explanation: The cycle time is the sum of these three primary phases in the injection molding process.

3. Importance of Cycle Time Calculation

Details: Accurate cycle time calculation is crucial for production scheduling, cost estimation, and machine utilization. Reducing cycle time can significantly increase production capacity and profitability.

4. Using the Calculator

Tips: Enter each time component in seconds. All values must be non-negative. The calculator will sum the three components to give total cycle time.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical cycle time for injection molding?
A: Cycle times vary widely from a few seconds for small parts to several minutes for large, complex parts.

Q2: Which phase typically takes the longest?
A: Cooling time usually accounts for 50-80% of the total cycle time.

Q3: How can cycle time be reduced?
A: Through mold design optimization, material selection, and process parameter adjustments.

Q4: Does cycle time affect part quality?
A: Yes, insufficient cooling time can lead to warpage or dimensional instability.

Q5: Should setup time be included in cycle time?
A: No, cycle time refers only to the repeating production cycle, not initial setup.