Rapid Tooling for Die Casting
Validate die-cast designs fast – prototype dies built in our China workshop in 2-3 weeks, so you confirm fit, function and cost before committing to a production die.
Free Consultation2-3 Weeks
Prototype Die
0.4mm
Min Wall
China
Factory
500 pcs
MOQ
Materials
| Grade | Properties | Typical Applications |
|---|---|---|
| Aluminum ADC12 (A383) | Tensile Strength: 228 MPa, Density: 2.70 g/cm³, excellent castability, good thermal conductivity, thin-wall capability 1.0-1.5mm | Automotive parts, electronics housings, power tool bodies, heat sinks |
| Aluminum A380 | Tensile Strength: 324 MPa, Density: 2.71 g/cm³, most widely used die casting alloy, excellent combination of mechanical properties and castability | Engine components, transmission housings, appliance frames, lighting fixtures |
| Zamak 3 / Zamak 5 (Zinc) | Zamak 3: 283 MPa, ductile, smooth surface; Zamak 5: 328 MPa, stronger. Hot-chamber cast, thin walls 0.4mm | Hardware, locks, connectors, automotive interior, decorative parts |
| Magnesium AZ91D | Tensile Strength: 250 MPa, Density: 1.81 g/cm³, lightest structural alloy, excellent strength-to-weight ratio | Automotive instrument panels, electronics frames, camera bodies, power tool housings |
Process Parameters
| Parameter | Standard Range |
|---|---|
| Casting Process | Hot chamber (zinc) / cold chamber (aluminum, magnesium) |
| Dimensional Tolerance (Machined Faces) | ±0.02mm on CNC-machined surfaces |
| Dimensional Tolerance (As-cast) | ±0.05mm standard, ±0.10mm on larger features |
| Minimum Wall Thickness | 0.4mm (zinc), 1.0mm (aluminum), 1.2mm (magnesium) |
| Surface Roughness (As-cast) | Ra 1.6μm - 3.2μm |
| Max Part Size | 600mm x 400mm x 300mm (aluminum), larger for zinc |
| Prototype Die Life | 500 - 5,000 shots depending on alloy and die material |
| Production Die Life | 50k - 300k+ shots (H13) |
Surface Finishes
As-Cast
Clean die cast surface, Ra 1.6-3.2μm, ready for functional use or secondary finishing.
Vibratory Tumbling
Deburring and edge radiusing for safe handling and consistent finish; removes parting-line flash.
Bead Blasting
Uniform matte finish that hides casting texture and improves coating adhesion.
Powder Coating / Painting
Durable color finishes (RAL/Pantone) for indoor and outdoor parts.
Plating (Zinc / Nickel / Chrome)
For zinc castings: decorative and protective plating with bright or satin finish.
CNC Machining After Casting
Precision machining of critical faces, bores and threads to ±0.02mm after casting.
Design for Manufacturing (DFM)
- Free DFM review of casting geometry within 24 hours before any tooling starts
- Confirm wall thickness and draft so the prototype die produces fillable, ejectable parts
- Balance wall sections to prevent porosity and cold shuts in the first trial shots
- Define gate and runner location for the specific alloy and part geometry
- Specify machining stock only on faces needing tight tolerance, then CNC after casting
- Assess porosity risk for pressure-tight or sealed features early
- Plan ejection (pins/lifters) to avoid cosmetic read-through on visible faces
- Use the prototype run to lock cost, cycle time and finish before production tooling
Tooling & Capacity
| Type | Lead Time | Suitable For |
|---|---|---|
| Prototype Die (Aluminum / Soft Steel) | 2-3 weeks | 500-5,000 pieces, design validation and pre-production bridge |
| Rapid Production Die (Pre-hardened) | 3-4 weeks | 5,000-50,000 pieces, faster than full-hardened production tooling |
| Production Die (H13, nitrided) | 6-8 weeks | 50k-300k+ shots, high-volume production with maximum die life |
Quality Assurance
- Incoming alloy verification – composition checked on incoming ingot lots
- First Article Inspection (FAI) with CMM measurement before mass run
- In-process checks at casting, trimming and CNC stations
- Dimensional inspection with calipers, gauges and CMM on critical features
- Surface inspection for cold shuts, porosity, flow lines and flash
- Casting weight and trim verification for process control
- Each lot is traceable, with inspection records kept for the batch
- Final inspection and anti-corrosion packing for transit
Applications
- Design validation: confirm form, fit and function before committing to production tooling
- Bridge production: 500-50,000 pieces between prototype and full-volume tooling
- Automotive housings and brackets: test-fit before high-volume launch
- Power tool bodies: early-market and pilot runs
- Electronics frames and shields: pilot and pre-production batches
- LED lighting housings: design lock before mass tooling
- Industrial enclosures: low-volume and custom variants
- Custom die cast parts at any pilot volume
Why Choose FHY Precision
Faster time-to-first-part: prototype die in 2-3 weeks vs 6-8 weeks for a production die
Lower upfront risk: validate design, cost and finish before the larger production-die investment
Bridge volume covered: 500-50,000 pieces without waiting on hardened tooling
Material flexibility: aluminum, zinc and magnesium all supported in rapid tooling
In-house CNC machining: critical features held to ±0.02mm after casting
Free DFM analysis: upload STEP/IGES for a report within 24 hours on walls, draft and gates
Direct scale-up: data from the prototype run feeds into production tooling decisions
One-stop: tooling, casting, machining, finishing and inspection from China
FAQ
1. When should I choose rapid tooling instead of a production die?
Choose rapid tooling when you need to validate a design, run a pilot, or bridge 500-50,000 pieces before committing to a hardened production die. It delivers first parts in 2-3 weeks at far lower tooling cost. Choose a production H13 die when volume is high (50k+ shots) and you want maximum die life and per-piece economy.
2. What is a rapid die made from, and how long does it last?
A rapid die is typically cut from aluminum or soft/pre-hardened steel rather than fully hardened H13. It produces roughly 500-5,000 good shots depending on alloy and part geometry – enough for validation and bridge production. We tell you the expected life up front so there are no surprises.
3. What alloys can you cast in rapid tooling?
Aluminum (ADC12/A380), zinc (Zamak 3/5) and magnesium (AZ91D) are all supported. Zinc is hot-chamber (lower temperature, gentler on tooling); aluminum and magnesium are cold-chamber. The alloy choice follows the same rules as production casting.
4. What tolerances and wall thickness can rapid die casting achieve?
As-cast tolerance is ±0.05mm standard, with ±0.02mm on CNC-machined faces after casting. Minimum walls: 0.4mm (zinc), 1.0mm (aluminum), 1.2mm (magnesium). We confirm the achievable spec in the DFM review before tooling.
5. What does rapid tooling cost compared with a production die?
Rapid tooling is a fraction of production-die cost and is often partly or fully absorbed when you scale into production tooling with us. We itemize tooling and piece price in the quote so you can see the bridge cost clearly.
6. How long does the whole process take?
Prototype die: 2-3 weeks, with T1 samples a few days after completion. Bridge production runs then ship in 1-3 weeks per batch. Production die (if you scale up): 6-8 weeks. Dates are confirmed in writing.
7. Can I get a sample before mass production?
Yes – that is the main point of rapid tooling. We recommend approving a T1 trial shot before committing to volume, and production begins only after you sign off.
8. Do you provide CNC machining and finishing after casting?
Yes. Critical faces, bores and threads are CNC-machined to ±0.02mm, and we offer tumbling, blasting, powder coating, plating (zinc) and painting – all coordinated in one place.
9. Can you sign an NDA to protect my design?
Yes. NDA signage is standard before reviewing files; drawing access is restricted to the project team and parts are never shown without written permission.
10. Do you ship internationally?
Yes, worldwide. Samples by express (3-7 business days); volume by air or sea freight (2-6 weeks). Export paperwork includes commercial invoice, packing list and origin documentation, with anti-corrosion packing.
11. How do I start?
Send your STEP/IGES (or drawings). We return a free DFM report within 24 hours and a quote covering rapid tooling, piece price and lead time. Once approved, tooling starts and T1 samples follow in 2-3 weeks.
12. What is bridge tooling, and when does it make sense?
Bridge tooling sits between rapid aluminum dies and full production steel: typically pre-hardened steel such as P20 or NAK80, 1-4 cavities, 3-6 weeks lead time, and a service life of roughly 50,000-200,000 shots. It fits the awkward middle case – your design is 90% validated but you want one more round, or volume is real but not yet large enough to justify a production die. It lets you start shipping while production tooling is built, instead of either over-investing early or under-tooling late.
13. How much does a design change cost on a rapid die versus a production die?
On an aluminum rapid die, changes are often weld, re-machine and re-try – a few hundred dollars and a few days. On a hardened production die, the same change means EDM work, possible re-hardening, or insert replacement: $5,000-$30,000 and 2-6 weeks, and in the worst case the die is scrapped. The industry rule of thumb: do not invest in production tooling until the design is frozen and validated. If there is even a 20% chance of a significant geometry change, run rapid or bridge tooling first.
14. Which materials should avoid aluminum rapid dies?
Abrasive and corrosive materials accelerate aluminum wear significantly: glass-filled resins, PVC, POM (acetal) and heavily flame-retardant compounds. For these, even moderate volumes call for bridge or production steel tooling. For die casting specifically, the same logic applies to aggressive zinc alloys with high impurity risk and to long runs where dimensional drift matters. If your program plans glass-filled material from day one, we will recommend steel tooling even at pilot volumes – and explain why.
15. Who owns the tooling, and what records transfer to the production die?
Tooling ownership, storage location and the tooling file should be named in the agreement before work starts: who owns the die when the program ends, where it is kept, and which drawings and service records ship with it. A good rapid tooling engagement produces records that transfer forward – gate and parting-line notes, ejector and insert decisions, machining allowance, sample correction history and approved cosmetic surfaces. That file is what turns a rapid-tooling spend into production learning instead of sunk cost.
16. How do I know when to move from rapid tooling to a production die?
Three signals converge: the design is frozen (no open geometry questions), demand is proven (repeat orders, not one-off pilots), and the rapid tool shows wear or dimensional drift that affects the parts that matter. The economic test is total lifecycle cost – cycle time, maintenance, scrap, tuning and downtime on the rapid tool versus amortized production tooling across your forecast volume. We will run that comparison with your real numbers rather than a generic break-even, because the honest answer is project-specific.