1. Injection molding of 2 thermoplastic polymers
MPI/CO-INJECTION
Injection molding of 2 thermoplastic polymers

2. MPI/CO-INJECTION
Predicts the injection molding of 2 thermoplastic polymers, and their distribution through the part thickness.

3. What does MPI/Co-Injection do ?
Optimize Filling and Packing conditions of 2 co-injected polymers
Predict penetration of core material
Predict thickness of skin material
Determine the transition time for material change
Optimize material usage
Refine Part and Runner System design

4. MPI/Co-Injection

5. MPI/Co-Injection - Benefits
Time to Market
part fills correctly first time
less mold trials
Part Quality
identify and minimize molding problems
Cost Savings
efficient production

6. Key Issues Addressed Will the Part fill ?
When to set the transition point of material change
too early - core material ‘bleeds through’ skin
too late - inefficient use of core material
Speed of Injection
Optimal use of materials