SERVICES
Custom Die Casting Service
Die casting produces complex metal parts with tight tolerances and excellent surface quality at high production volumes. We manage the full chain in-house: mold design, tooling, casting, CNC finishing and surface treatment.
WHAT WE OFFER
What We Offer
Aluminum Die Casting
Lightweight, corrosion-resistant parts with good strength-to-weight ratio — housings, frames, brackets and structural components.
- ✓High dimensional stability
- ✓Thin-wall capability
- ✓Excellent thermal properties
- ✓Good machinability
Zinc Die Casting
High precision, thin walls and complex geometries with excellent detail reproduction — small housings, connectors and mechanical parts.
- ✓Tight tolerances
- ✓Smooth as-cast surfaces
- ✓Plating-ready finishes
- ✓High production efficiency
Post-Processing
CNC machining, tapping, surface finishing and assembly done in-house so cast parts arrive ready for installation.
- ✓Precision machining of critical faces
- ✓Threads & inserts
- ✓Anodizing, powder coating & plating
- ✓Assembly & inspection
HOW IT WORKS
From Inquiry to Delivery
Mold Design & Development
Part geometry, gating, overflow and cooling layout reviewed with mold-flow simulation before steel is cut.
Die Casting Mold Making
Dies are machined from high-durability S136 mold steel, built in-house for full control of fit and finish.
Product Die Casting
Molten alloy is injected into the die at high pressure on 58–800 T machines; cycles repeat automatically for consistent parts.
Gate Removal & Deburring
Gates, runners and flash are trimmed and parts are deburred to spec.
CNC Machining
Critical faces, bores and mounting features are precision-machined to drawing.
Tapping & Drilling
Threads and holes are added with CNC tapping and drilling stations.
Grinding & Polishing
Parting-line witness and rough surfaces are ground and polished for appearance or plating.
Quality Inspection
Dimensional, porosity and surface checks at every stage — over 98% pass rate in full-scale inspection.
Surface Treatment
Anodizing, powder coating, plating or painting applied per specification.
Final Inspection & Assembly
Final dimensional audit, assembly of sub-components and approved packing for shipment.
CHALLENGES
Challenges This Service Solves
FAQ
Custom Die Casting Service — FAQ
What alloys do you cast?
Aluminum (A380, ADC12, A356), zinc (Zamak 3/5, ZA-8) and magnesium (AZ91D, AM60B) on dedicated furnaces.
What machine sizes do you run?
Multiple automatic die-casting machines from 58 T up to 800 T, covering small precision parts to large housings.
How fast are lead times?
25 days for die making, 3 days for sampling after tool completion, and 7 days for mass production once approved.
What quality level can I expect?
Over 98% pass rate in full-scale inspection, with dimensional, porosity and surface checks at every stage.
How many parts can you produce?
Monthly output up to 600,000 pieces with multi-tonnage automatic lines.
What finishes are available?
Anodizing, powder coating, plating, painting and polishing — applied in-house after CNC post-processing.
Do you do secondary machining?
Yes — CNC machining, tapping, drilling, grinding and polishing are all done in-house.
Can magnesium parts be cast?
Yes — dedicated magnesium furnaces and handling for lightweight structural parts.
RELATED SEARCHES
What Buyers Search
* Keywords from Semrush competitor data — one page per search intent.
Aluminum, Zinc and Magnesium Alloys for Die Casting
We cast aluminum, zinc and magnesium alloys on 58–800 T automatic die-casting machines with dedicated alloy furnaces. Source: First Mold die-casting page, https://firstmold.com/die-casting-service/
Tolerances and Wall Thickness in Die Casting
Die casting holds tighter tolerances than sand casting and supports thinner walls than most molding processes. Values per ISO 8062-3 tolerance grades and general DFM references. Industry-standard reference (ISO 8062-3 / DME mold-class convention)
| Alloy | Min. Wall Thickness | Typical Wall | Dimensional Tolerance |
|---|---|---|---|
| Aluminum (A380 / ADC12) | 0.8 – 1.0 mm | 1.5 – 3.0 mm | ±0.05 mm precision features, ±0.15 mm general |
| Zinc (Zamak 3 / 5) | 0.5 mm | 1.0 – 2.5 mm | ±0.025 mm achievable on small features |
| Magnesium (AZ91D) | 1.0 mm | 2.0 – 3.5 mm | ±0.10 mm general |
| Draft angle (all) | 0.5° min | 1° – 2° recommended | Required for ejection |
| Machine range | 58 T smallest | — | 800 T largest |
| Surface finish as-cast | Ra 1.6 μm | — | Ra 0.8 μm with polish |
Post-Casting: Finishing Your Die Cast Parts
One-stop customization — from raw casting to ready-to-install component, all in-house. Source: First Mold die-casting page, https://firstmold.com/die-casting-service/ / MOLDITQUICK facility data (Dongguan Guohong Precision, 10,000 m² plant, 280 staff)
CNC machining of critical faces — bores, sealing surfaces and mounting bosses machined to drawing tolerance.
Tapping, drilling & inserts — threads, standoffs and threaded inserts added after casting.
Vibratory & manual deburring — clean edges on every feature, including internal passages.
Polishing & high-gloss finishing — from functional matte to decorative mirror surfaces.
Anodizing & powder coating — corrosion protection and color for aluminum parts.
Plating (chrome, nickel, zinc) — wear, conductivity and decorative finishes for zinc parts.
Painting & pad printing — logos, scales and brand marks.
Assembly & inspection — sub-assembly, function testing and full dimensional reports.
Die Casting vs Injection Molding: Which Process Fits?
The right process depends on material, strength, volume and budget. Numbers from our production lines. Source: First Mold die-casting page, https://firstmold.com/die-casting-service/ / Source: First Mold injection-molding page, https://firstmold.com/injection-molding-service/
Die Casting Applications
10 years of custom zinc, magnesium and aluminum die casting across industries. Source: First Mold die-casting page, https://firstmold.com/die-casting-service/
New Energy Vehicle Parts
Battery housings, motor housings and structural brackets for EV programs — lightweight aluminum with tight tolerance.
3C & Consumer Electronics
Laptop casings, smartphone frames and digital accessories with thin walls and premium as-cast surfaces.
5G Communication
Heat-dissipating housings and structural components for base stations and networking gear.
Appliances & Lighting
Track light castings, appliance frames and high-end instrument components with excellent thermal performance.
Decorative & Nameplates
Perfume caps, bottle caps, nameplates and decorative items — zinc alloy detail reproduction and plating-ready finish.
Industrial & Instrument
Gears, tool bodies, enclosures and precision instrument components in aluminum and magnesium.