What are the Types of Gating in MIM? How do they function? How to remove the vestige? How to avoid it during design?

Date：2025-07-31   Views：1006

Key functions of gates in MIM

• Guide and control melt flow

• Prevent backflow

• Manage filling speed and pattern

• Influence part strength and sintering behavior

• Affect final part appearance (gate vestige)

Common gate types in MIM

To Remove Vestiges:

• Manual: Knives, pliers (low cost, inconsistent)

• Mechanical: Punching dies (fast, precise)

• Machining: Milling/grinding (high accuracy)

• Laser: Non-contact, precise (expensive)

• Tumbling: Post-removal polishing

To Minimize Gate Marks in Design:

• Use self-removing gates (point/undercut gates)

• Place gates in hidden/thick areas

• Optimize size (small but functional)

• Add break points for clean removal

• Avoid stress zones