Cost Optimization
Injection molding costs are driven by several factors. Understanding and optimizing each can significantly reduce your per-part cost.
Cost Breakdown
A typical injection molding cost breaks down as:
| Component | Typical % | Key Factors |
|---|---|---|
| Tooling (mold) | 20-40% | Mold complexity, cavity count, material, features |
| Material | 20-35% | Resin type, color, fillers, regrind allowance |
| Machine time | 20-30% | Cycle time, machine size, clamp tonnage |
| Labor & overhead | 10-20% | Setup, quality inspection, packaging, shipping |
Design-for-Cost Strategies
- Reduce wall thickness: Every 1mm reduction can cut cycle time by 20-30%
- Eliminate unnecessary features: Undercuts, threads, and tight tolerances add mold complexity
- Design for multi-cavity: More cavities = lower per-part tooling cost at higher volumes
- Use standard components: Off-the-shelf inserts, fasteners instead of custom molding
- Minimize cosmetic requirements: Class B surfaces cost less than Class A
Production Volume Strategy
| Volume | Annual Qty | Best Approach |
|---|---|---|
| Prototype | 10-1,000 | 3D printing / CNC machining / RTV silicone tooling |
| Low volume | 1k-10k | Aluminum molds, simplified tooling |
| Medium volume | 10k-100k | Steel molds, multi-cavity, hot runner |
| High volume | 100k+ | Hardened steel, high-cavitation, fully automated |
Optimize Your Part Cost
Upload your design and get competitive quotes from multiple suppliers.
Get Pricing →