Low Volume Injection Molding: A Complete Guide to Small Batch Production
Not every project needs a million parts. Low volume injection molding (typically 100 to 10,000 parts) serves product launches, pilot runs, spare parts, and niche products. This guide explains the options available and how to get small batch plastic parts cost-effectively from China.
What Is Low Volume Injection Molding?
Low volume injection molding uses simplified tooling and production processes optimized for quantities from 100 to 10,000 parts per year. Instead of investing in a production-grade steel mold costing $15,000-$50,000, low volume projects use aluminum prototype molds, bridge tooling (soft steel), 3D-printed mold inserts, and family molds.
Low Volume Mold Options
| Mold Type | Cost Range | Mold Life | Best For |
|---|---|---|---|
| Aluminum mold | $1,500 – $5,000 | 5,000 – 50,000 shots | Pilot runs, prototypes |
| Bridge tool (P20 steel) | $5,000 – $15,000 | 50,000 – 200,000 shots | Market testing |
| Production mold | $15,000 – $50,000+ | 500,000+ shots | High volume production |
When to Choose Low Volume Injection Molding
- Product testing — Validate market demand before committing to a production mold
- Limited demand products — Medical specialties, industrial spare parts, niche consumer goods
- Seasonal products — Annual refresh parts
- Bridge production — Fill the gap between prototype and full production tooling
- Regulatory compliance — Parts that may change due to evolving regulations
Getting Low Volume Parts from China
Chinese mold makers excel at low volume injection molding because of competitive tooling costs and fast turnaround. A typical project from Dongguan works like this: send your CAD files → receive a cost estimate within 48 hours → mold fabrication in 2-4 weeks (aluminum) or 4-6 weeks (bridge steel) → first article samples → production and delivery.
RCH Plastic provides low volume injection molding services with aluminum and bridge tooling. Minimum order quantity is 100 parts. Request a quote for your small batch project.