I. Price Ranges
Proprietary mold price ranges. Based on industry trends, injection mold pricing is categorized as follows: Domestic market—standard small parts (no undercuts) using P20 steel range from 8,000 to 18,800 RMB, while those requiring lifter and slider mechanisms range from 18,800 to 30,000 RMB;
simple appliance or digital device housings (718H steel) range from 30,000 to 80,000 RMB; high-gloss cosmetic parts with multiple sliders range from 80,000 to 150,000 RMB; transparent food or cosmetic components require corrosion-resistant S136 steel (increasing material costs by 30%–80%) and start at 40,000–90,000 RMB for a single cavity; large parts—single-cavity hot runner molds range from 180,000 to 400,000 RMB, automotive interior parts range from 200,000 to 600,000 RMB, and large components like bumpers start at 600,000 RMB. International market—prototype molds (aluminum) range from $1,000 to $10,000; simple single-cavity molds from $5,000 to $20,000; medium-complexity molds from $20,000 to $70,000; and high-precision multi-cavity molds from $70,000 to over $200,000. Prices vary widely—from a few thousand to hundreds of thousands—depending on the four factors outlined below.
II.
Four Key Drivers
Four key price drivers.
According to industry standards, mold pricing is driven by four factors: part complexity (features such as undercuts, internal threads, side-action cores, and complex cavity geometry)—prices rise significantly with each additional moving mechanism (slides, lifters, inserts), ranging from a base of $8,000 for standard consumer goods to $18,000+ for molds requiring lifters and slides; number of cavities—multi-cavity molds offer higher efficiency but entail higher initial tooling costs (e.g., a 4-cavity mold costs 2.5 to 3 times—not 4 times—that of a single-cavity mold); steel grade—costs for a single-cavity mold base range from $3,000–$8,000 for domestic P20 steel, $5,000–$12,000 for H13 hot-work steel, and $8,000–$15,000 for S136 stainless steel (used for medical or optical parts); and tolerance requirements—high-precision molds with tight tolerances double the machining and inspection costs (starting at $10,000 for high-precision units). Remember the rule of thumb: the more complex the structure, the higher the cavity count, the better the steel, or the tighter the tolerances, the higher the price.
III.
Quote Breakdown
How to break down the quotation.
According to industry pricing standards, a quote for a custom mold is broken down as follows: the total price equals material costs + design fees + machining costs + mold trial fees + management fees and profit. Material costs account for 30%–40% (including the mold base, mold inserts, core and cavity, standard components like ejector pins and guide pillars, and hot runner systems; the grade of steel used directly impacts the price). Design fees account for approximately 10% (DFM analysis; 3D design ranging from 500 to 4,000 RMB depending on complexity; 2D drafting from 300 to 1,000 RMB; BOM lists from 200 to 800 RMB). Machining costs account for 30%–50% (milling, turning, wire-cut EDM, CNC machining, sinker EDM, benchwork, and polishing; low-cost molds that skip heat treatment or reduce polishing steps have short lifespans). Mold trial fees (covering trial materials and machine setup time). Management fees and profit—and the pitfalls of low-cost molds: using inferior or recycled steel (resulting in short lifespans), cutting directly to the mold without performing mold flow analysis, and skipping heat treatment. When a mold quote is ridiculously low, it is the lifespan and quality that are being sacrificed.
IV.
Steel and Mold Lifespan
How to choose the right steel and lifespan.
Based on industry standards for mold materials, here is how to select steel based on expected lifespan: P20—an economical pre-hardened steel; the mainstream choice for low-volume production (under 5,000 units/month), single-cavity designs, and mold costs ranging from 5,000 to 15,000 RMB; typical lifespan of 100,000 to 500,000 cycles. 718H—mainstream choice for home appliance and digital device housings; mold costs for simple housings range from 30,000 to 80,000 RMB. S136—corrosion-resistant stainless steel; the essential choice for transparent parts (food, cosmetics, medical); material costs are 30%–80% higher, with single-cavity mold prices starting at 40,000–90,000 RMB. H13—hot-work tool steel; for high-temperature, high-wear applications. Aluminum molds—30%–50% cheaper than steel molds but wear out faster; suitable for prototypes and low-volume runs. Simple molds (rapid molds)—cost 2,000–8,000 RMB, lifespan of 3,000–10,000 cycles, precision of ±0.1 mm; suitable for sampling and small batches. Standard mass-production molds—cost 15,000–50,000 RMB, lifespan of 100,000–500,000 cycles, precision of ±0.05 mm—lifespan and precision are directly linked to the steel material, while your monthly production volume determines which mold grade to choose.
V.
Cost-Effective Mold Ordering
Order the mold in the most cost-effective way possible.
To optimize costs for custom-molded parts, consider these strategies: Prioritize DFM (Design for Manufacturability)—conducting a DFM review before cutting the mold can eliminate over 60% of potential modification costs, as every revision round is expensive; evaluate the break-even point—compared to 3D printing or CNC machining, the break-even point for injection molding usually falls between 500 and 5,000 units (e.g., for a 300-unit run, molding costs ¥58,900—¥58,000 for the mold plus ¥3 per unit—whereas 3D printing costs ¥24,000 at ¥80 per unit, making 3D printing less than half the price); select the mold based on volume—use a P20 single-cavity mold (¥5,000–¥15,000) for monthly outputs under 5,000 units, or upgrade to higher-grade steel and multi-cavity hot runner systems (over ¥50,000) for outputs exceeding 50,000 units (where the mold cost per unit is lower); understand quoting methods—options include bottom-up (itemizing materials and labor), historical analogy, complexity coefficients, and software estimation (always compare multiple itemized quotes); and stay vigilant regarding details—clarify who pays for the mold and who owns it (custom molds usually belong to the client), and decide whether to amortize mold costs across the production run (calculate total volume before commissioning the mold; if the volume is insufficient, use 3D printing as an interim solution).
Conclusion
How much does it cost to custom-mold parts for automation equipment?
The answer is: anywhere from a few thousand to hundreds of thousands of yuan, with the price determined by four key factors.
Price tiers: Simple molds (no undercuts) range from 8,000 to 18,800 RMB; molds with lifters and sliders range from 18,800 to 30,000 RMB; housing molds range from 30,000 to 80,000 RMB; high-gloss molds with multiple sliders range from 80,000 to 150,000 RMB; transparent parts using S136 steel incur a 30%–80% surcharge (starting at 40,000–90,000 RMB for single-cavity); and hot runner molds range from 180,000 to 400,000 RMB. Four key cost drivers: part complexity (more sliders, lifters, and inserts increase cost), cavity count (a 4-cavity mold costs 2.5 to 3 times more than a single-cavity one), steel grade (P20: $3,000–$8,000; H13: $5,000–$12,000; S136: $8,000–$15,000), and tolerance requirements (tight tolerances can double the price). Quote breakdown: materials (30%–40%), design (10%), machining (30%–50%), plus mold trials, management, and profit; low-priced molds compromise on lifespan and quality. Mold selection: simple molds (2,000–8,000 RMB; 3,000–10,000 cycles) vs. standard mass-production molds (15,000–50,000 RMB; 100,000–500,000 cycles); for monthly production exceeding 50,000 units, upgrade to hot runner, multi-cavity molds. Cost-saving tips: DFM (Design for Manufacturability) eliminates 60% of modification costs; the break-even point for 3D printing versus molding is between 500 and 5,000 units; select the mold based on production volume.
Industry practice dictates evaluating three factors before commissioning a custom mold: is production volume sufficient to justify tooling? who owns the mold? and is the steel grade appropriate?
Only by clarifying these three points can the investment in the mold be considered worthwhile.
