Mold flow analysis (MFA) is a computer simulation process that predicts how molten plastic will behave inside a mold cavity during injection molding. This powerful tool helps engineers optimize part and mold design before cutting steel.
1. What Is Mold Flow Simulation?
Mold flow analysis uses specialized software to simulate the injection molding process, predicting how plastic material will fill, pack, and cool inside the mold cavity.
2. Key Benefits of Mold Flow Analysis
By simulating the injection process before cutting steel, manufacturers can identify and eliminate potential defects early, reducing mold trial iterations by 50-70%.
3. The Mold Flow Simulation Process
The process includes: part geometry import, material selection, gate location analysis, fill analysis, pack analysis, and cooling analysis. Each step provides critical insights for mold optimization.
4. Common Defects Detected by Mold Flow
Mold flow simulation can predict weld lines, air traps, short shots, sink marks, warpage, and excessive shear stress before any metal is cut.
5. RCH Plastic’s MFA Service
At RCH Plastic, we integrate mold flow analysis into every custom mold project to ensure first-shot success and reduce tooling risks for our clients.

