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How Much Does a Custom Plastic Injection Mold Typically Cost?
How Much Does a Custom Plastic Injection Mold Typically Cost?
Custom plastic injection mold costs typically range from $3,000 to over $100,000, with the majority of standard production molds falling between $8,000 and $30,000. At Longxiang, a typical single-cavity production mold starts at $6,000, while complex multi-cavity or high-precision molds can reach $50,000–$100,000+. The final price depends on part size, cavity count, steel selection, surface finish, and tolerance requirements.
Price Range by Mold Type
| Mold Category | Typical Price Range | Typical Lead Time | Common Applications |
|---|---|---|---|
| Prototype / Aluminium Mold | $1,500 – $5,000 | 10–15 days | Sample testing, low-volume (under 1K) |
| Simple Steel Mold (1-cavity) | $5,000 – $12,000 | 20–25 days | Small parts, caps, simple enclosures |
| Standard Production Mold | $12,000 – $30,000 | 25–35 days | Medium parts, automotive, consumer goods |
| Multi-Cavity Mold (2–8) | $20,000 – $50,000 | 30–45 days | High-volume caps, bottles, medical disposables |
| High-Cavity Mold (12+) | $40,000 – $100,000 | 40–60 days | Mass production, thin-wall packaging |
| Unscrewing / Collapsible Core | $25,000 – $80,000 | 35–55 days | Threaded caps, closures with undercuts |
| Insert / Overmold | $10,000 – $35,000 | 25–40 days | Multi-material parts, soft-grip handles |
What Drives the Cost?
Part Size & Weight
Larger parts require bigger mold bases, more steel, and larger machines. A 500g part mold costs about 2–3x more than a 50g part.
Cavity Count
Doubling cavities adds ~50–70% to mold cost, not 100%, because the mold base and some components are shared.
Steel Grade
Upgrading from P20 to S136 adds 20–40% to material cost. H13 with heat treatment adds 15–25%.
Surface Finish
SPI A1 mirror polish adds $800–$2,500. Custom texture (VDI, MT) adds $500–$3,000 depending on area.
Tolerance & Precision
±0.01mm tolerances require EDM machining and more skilled labor, adding 15–30% over standard ±0.05mm molds.
Side Actions & Lifters
Each side action adds $1,500–$5,000. Complex unscrewing mechanisms can add $8,000–$20,000.
Longxiang Typical Cost Breakdown (Standard Mold)
Design & DFM10%
Steel Material20%
CNC Machining30%
EDM & Wire Cutting18%
Fitting & Assembly12%
Trial & Inspection10%
Longxiang Cost Optimization Example
A Canadian client budgeted $45,000 for a 4-cavity mold for 300g packaging containers. Longxiang proposed an alternative: a 2-cavity mold with upgraded H13 steel ($22,000) plus a 2-cavity backup mold ($18,000) for the same total. This gave the client redundant tooling and extended maintenance intervals — saving $5,000+ per year in downtime costs.
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