Precision-engineered aluminum die cast LED heat sinks arranged for automated Shot Blasting to ensure optimal thermal dissipation for high-power lighting fixtures.

ISO Certified Manufacturer

LED Lighting Component
Die Casting

Trusted by international brands to produce die cast aluminum heat sinks and housings with the tight tolerances and surface quality your specifications demand.

JoinCast manufactures aluminum die-cast heat sinks and housings for LED lighting fixtures where thermal management directly determines component longevity and performance consistency. For over two decades, we have supplied LED components to North American and European lighting manufacturers, with production serving street lighting, high-bay warehouse fixtures, commercial floodlights, and architectural lighting requiring sustained operation without thermal degradation.

At Joincast our technology and automation delivers high accuracy and repeatable precision for LED lighting heat sinks and fin structures. At our Taiwan-based production facility, we serve global brands with high-quality, reliable, and ISO-certified quality components that brands can rely on.

ISO-Certified Quality & Advanced Inspection Component Inspection

JoinCast strictly adheres to the ISO 9001:2015 quality management system. We have invested in a dedicated 10 person QC team for stringent quality control from incoming material to right through to final shipment.

We use Keyence 3D Scanning Systems for dimensional verification and 3D CMMs for micron-level dimensional accuracy verification

Keyence 3D Scanning
Mitutoyo 3D CMM Verification
Dedicated 10 Member QC Team

Why should we use die-cast aluminum for our LED heat sinks rather than extruded aluminum?

Die casting gives you more design freedom than extrusion, particularly when it comes to fin geometry. Complex 3D fin structures, integrated mounting features, and housing details that would require multiple machining operations on an extruded part can all be cast in a single shot.

For high-volume production, that means lower per-unit cost and fewer secondary processes to manage. Extrusion tends to work well for simpler, linear heat sink profiles, but where your design demands more complexity, die casting is generally the more practical and cost-effective route.

What types of LED fixtures have you made components for?

We have supplied heat sinks and housings to North American and European lighting brands for over two decades, across street lighting, high-bay warehouse fixtures, commercial floodlights, and architectural lighting applications. These tend to be fixtures running at high duty cycles where sustained thermal performance is a core requirement. If you have a specific application in mind, share your requirements with us and we can advise on whether we’ve handled something similar and what approach would work best.

How do you make sure the fin geometry comes out right on complex heat sink designs?

The mold engineering stage is where this gets resolved. Our engineers use flow simulation to model how aluminum fills the cavity before any tooling is made, which identifies potential problems with fill, shrinkage, or surface quality early. For heat sinks with dense or complex fin arrangements, getting this right at the design stage matters; corrections after tooling is cut are expensive and slow.

Because we handle mold engineering in-house, the thermal and dimensional requirements of your design are built into the tooling from the start rather than treated as someone else’s problem.

We've had issues with heat sinks from previous suppliers not meeting flatness tolerances. How do you handle this?

Base plate flatness is one of the more common sources of problems with die-cast heat sinks, and it directly affects thermal contact with the LED array. Our approach is to catch variation during production rather than at final inspection. We use Keyence 3D scanning and Mitutoyo CMM systems for dimensional verification throughout the run, and our 10-person QC team monitors quality from incoming material through to shipment under ISO 9001:2015.

If a tolerance issue develops mid-run, the goal is to identify and correct it before it affects a significant portion of your batch.

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From Design to Delivery: Full-Service Die Casting

At Joincast we keep every critical process in-house at Joincast, operating from a 9,900 m² facility to deliver dependable lead times and consistent quality. Across three production sites, we run die casting machines (135T–900T), CNC machining centers with automation, plus fully integrated surface treatment lines.

From small precision parts to castings up to 3 kg, we process ADC-12 / A383 and ADC-3 / A360 aluminum alloys in a 24-hour, single-supplier operation.