The base and the pin field are cast in one shot in A380, with the pins formed by round pockets in the die. The reverse face is machined flat and the two through holes are drilled from that face, so the part sits square on the device. A dark coating is applied for appearance and to cover the as-cast skin between pins, where blasting cannot reach evenly. The radial parts in the die casting heat sink range all share this pin taper and the same coating routine. What the die can hold on pin position after ejection is set out in die cast heat sink tolerances.
Draft is what makes them releasable.
Where the bending load is highest.
Safer to handle, and the air sees them.
Drilled from the machined face.
Base and pins in the same cycle.
| Base Material | A380 aluminum, high-pressure die casting, dark coating |
|---|---|
| Pin Shape | Round, tapered from root to tip |
| Pin Tips | Rounded |
| Base | Circular plate, reverse face machined |
| Fixing | 2 through holes |
| Finish | Dark 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.
Pin height on a cast round pin is limited by release, not by the heat calculation. Past a certain height-to-diameter ratio the pin drags on ejection and the field scuffs, so the practical ceiling comes from the draft angle you are willing to give up.
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.
Round pin-field castings suit loads with no preferred airflow direction:
LED spot and downlights
Camera modules
Sensor pods
Small power units
Consumer audio
Send the base diameter, the device footprint, the pin height you can fit and the fixing positions. KingKa checks the pin height against the tip-to-root ratio the die can release, then sets the pitch so the field still passes air at the pressure your fan can deliver. Where the grid is square rather than radial, the square pin grid casting uses the same alloy and the same machine.
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 pin height and the base diameter together. A tall pin on a small base cannot be ejected without a steeper taper, and changing the taper changes the tip area the thermal calculation was based on.
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.
