Best Materials for Short-Run Injection Molds (100–2,000 Shots) 

When you develop or design engineer a new thermoplastic part, speed and cost-efficiency are critical during the entire product development process. In order to avoid mistakes after invested in expensive mass production molds short run or prototype moulds can be made.  

A second reason to opt for short run molds is that final products is exclusive and only made in small quantities.

At our company Triple-c Injection Molds China, we specialize besides mass injection molding in short-run injection mold solutions for volumes between 100 (hundred) to 2,000 shots. Choosing the right mold material ensures your project stays on time and within budget. 

the top 5 materials for low volume molds

1. Aluminum (6061 / 7075) 

  • Fast to machine, lightweight, and ideal for rapid prototyping 
  • Best suited for non-abrasive materials and simple geometries 
  • Typical lifespan: up to 2,000 shots 

2. P20 Tool Steel 

  • Offers greater durability than aluminum while still cost-effective 
  • Ideal for textured surfaces and more complex designs 
  • Suitable for 5,000+ cycles in many cases 

3. 3D Printed Tooling 

  • Rapid turnaround, especially for concept testing 
  • Best for simple shapes and low-temp plastics 
  • Typical lifespan: 100–500 shots 

4. Epoxy or Urethane Mold Systems 

  • Extremely low cost and fast fabrication 
  • Suitable for early-stage testing or display models 
  • Lifespan: typically under 200 shots 

5. Hybrid Aluminum-Steel Molds 

  • Combine aluminum bases with steel inserts in wear areas 
  • Great for glass-filled plastics or tight tolerances 

🔸 How to Choose? 

Choosing the best mold material depends on: 

  • The total Shot quantity of your part that is required 
  • Plastic resin used (e.g., PP, ABS, GF-Nylon) 
  • Part complexity and finish 
  • Lead time requirements 

Our tooling engineer experts can help you evaluate the best option for your application. 

3d printed core and cavity for fast short run injection molding
3d printed core and cavity for fast short run injection molding