What is a typical minimum order quantity for custom injection molding parts?

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MOQs for injection molding depend on mold type: soft tooling (aluminum molds) typically requires 100-500 units, while production tooling (steel molds) requires 500-5,000+ units depending on part size and complexity. SOMI offers flexible MOQs starting at 100 units for prototyping and low-volume production using aluminum tooling.

Tooling Types and MOQ Impact

Aluminum molds (soft tooling): Lower cost ($3,000-$15,000), shorter lead time (2-4 weeks), but limited tool life (10,000-50,000 cycles). MOQ: 100-500 units. Ideal for prototyping, market testing, and low-volume production. Steel molds (hard tooling): Higher cost ($10,000-$100,000+), longer lead time (6-12 weeks), but tool life of 500,000-1,000,000+ cycles. MOQ: 1,000-10,000 units depending on amortization requirements.

Factors Affecting MOQ

Part complexity: Simple parts with uniform wall sections fill faster and have lower MOQs. Material: Commodity materials (PP, PE) allow lower MOQs. Engineering and specialty materials often require higher minimums due to material sourcing minimums. Cavitation: Single-cavity molds have lower effective MOQs than multi-cavity family molds. Secondary operations: Parts requiring additional finishing or assembly typically have higher MOQs to justify setup.

Low-Volume Molding Strategies

For projects with volumes under 1,000 units, consider: aluminum tooling for lower upfront cost, single-cavity molds to minimize tooling expense, standard materials available from stock, simplified part designs without complex side actions, and bridge tooling that can later be transferred to production molds for higher volumes.

Why Choose SOMI Custom Parts

SOMI Custom Parts offers a flexible approach to injection molding MOQs that accommodates both startups and established manufacturers. Our aluminum tooling service is perfect for companies testing new products with volumes of 100-1,000 units. When your product proves successful, the same design can transition to steel production tooling for higher volumes. This phased approach minimizes initial investment while providing a clear path to scale.

Case Study

A startup developing a new kitchen gadget needed 500 injection-molded ABS parts for their Kickstarter campaign but could not justify $30,000 for steel tooling. SOMI recommended aluminum tooling at $8,500, produced 500 units, and helped them successfully launch. When the campaign exceeded expectations and demand reached 20,000 units, SOMI built steel production tooling and scaled up without any design changes required.

Industry Data

The low-volume injection molding market has grown 25% annually over the past 5 years, driven by startups, product testing, and on-demand manufacturing trends. Aluminum tooling accounts for 30% of all injection molds under $15,000 (Plastics News, 2025). The availability of low-MOO molding has reduced the average time from concept to market for new plastic products by 40%.