1. What is Gate Diameter Calculation?

The gate diameter calculation determines the appropriate size for the injection molding gate based on wall thickness. In the Philippines, a common rule of thumb is to make the gate diameter 80% of the wall thickness.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• 0.8 — Standard multiplier for Philippine injection molding
• Wall Thickness — Thickness of the molded part wall (mm)

Explanation: This formula provides a quick estimation of gate size suitable for most general-purpose injection molding applications in the Philippines.

3. Importance of Proper Gate Sizing

Details: Correct gate sizing is crucial for proper filling of the mold, minimizing defects, and ensuring part quality. Too small gates can cause flow restrictions, while too large gates can leave excessive gate marks.

4. Using the Calculator

Tips: Enter the wall thickness in millimeters. The value must be greater than 0. The calculator will provide the recommended gate diameter.

5. Frequently Asked Questions (FAQ)

Q1: Why use 0.8 as the multiplier in the Philippines?
A: This factor has been found to work well with common materials and molding machines used in Philippine manufacturing.

Q2: Does this work for all materials?
A: While generally applicable, some materials may require adjustments. Consult material-specific guidelines for precise requirements.

Q3: What about non-circular gates?
A: For rectangular gates, use equivalent cross-sectional area based on this diameter calculation.

Q4: When should I deviate from this rule?
A: Consider adjustments for very thick or thin walls, high-precision parts, or when using specialty materials.

Q5: Is this applicable to hot runner systems?
A: Hot runner systems may require different calculations, though this can serve as a starting point.