The plate and the fin field are cast together in A380, with the fins running to the part edge so the die can vent along the ends. Cast feet at the base give the part a standoff and keep the fin tips off the mounting surface. After casting the base face is fly-cut flat, the mounting holes are drilled, and the part is coated black - over a casting, a coating hides the flow marks that blasting alone will not remove. It sits with the flat parts in the die casting heat sink range, where the base face is the only machined surface. Whether cast fins beat cut fins on a plate this thin is the question in die cast vs skived fins.
Height without a thick slab.
Flatness comes from the field.
Formed fins do not need clearance.
Standoff built into the part.
Hides flow marks on the as-cast skin.
| Base Material | A380 aluminum, high-pressure die casting, black coating |
|---|---|
| Base | Thin flat plate, face machined |
| Fin Field | Dense straight fins, cast |
| Standoff | Cast feet at the base |
| Flatness | Held by the fin field, finished on the base face |
| Finish | Black coating |
| Base CNC Tolerance | Milling / drilling / tapping down to +/-0.005 mm |
| Dimensional Inspection | Hexagon CMM +/-0.001 mm; 2.5D optical projector |
| Quality System | ISO 9001:2015; IATF 16949:2016 |
| Capacity | 60,000+ thermal parts per year |
| Lead Time | Samples typically 7-15 days; production scheduled to volume |
Note: values above are KingKa build options and verified capability; final geometry, holes and finish are confirmed against your drawing.
Flatness on a thin cast plate is a casting problem, not a machining one. If the fin field is not balanced across the part, the plate will bow after ejection and no amount of fly-cutting will keep it flat once it is bolted down.
Design & CFD. 3D layout with CFD review sizes the fin field, pipe route and base thickness to the load and airflow.
Base machining. Plate, pockets and pipe channels are milled on 50+ CNC centers to +/-0.005 mm.
Fin and pipe joining. Fins skived, stacked or extruded; pipes pressed and soldered; the stack joined to the base by the process the design calls for.
Face fly-cutting. Contact face machined flat after joining so the part sits true on the device.
Final inspection. Hexagon CMM (+/-0.001 mm) and 2.5D projector check critical features; 4-stage IQC / IPQC / FQC.
Fin pitch and height - measured against the drawing before packing.
Base flatness - fly-cut face checked on the contact side.
CMM report - critical dimensions to +/-0.001 mm.
Joint inspection - solder or weld fillet checked along the stack feet.
Visual and batch audit - IQC / IPQC / FQC on every run.
Thin cast plates are used where height is the binding constraint:
Display backlights
Set-top and streaming boxes
Thin power adapters
Automotive lighting
Compact industrial sensors
Send the available height, the board outline, the fixing points and the coating colour. KingKa sets the base thickness against the flatness the field can hold, then checks the fin height against the draft the die needs before quoting the tool. When the plate also has to carry internal walls, the multi-cavity cast base takes over.
KingKa is a direct manufacturer with 16+ years in thermal production, 50+ CNC centers, in-house skiving, FSW and vacuum brazing, certified to ISO 9001:2015 and IATF 16949:2016.
Give the height budget and the flatness callout together. A plate quoted only on outline will come back flat on the bench and bowed on the board, because the field layout decides which way it moves.
One supplier for the whole assembly. Base, fins, pipes and hardware under one quality system.
CFD before tooling. Design review catches a bad layout before metal is cut.
Prototype to volume. Samples in 7-15 days, production scheduled to forecast.
