The body is cold forged from aluminum at room temperature, so the fin field comes out of the die in one piece with no bond line and no porosity. It is then machined for the mounting face, holes and any recess, cleaned, and black anodized: the surface is electrochemically converted to an oxide layer and dyed black. Film thickness and sealing are controlled so the fins do not bridge at the tips. The selection rules behind the fin and base proportions are in the cold forged heat sink guide.
Electrical isolation without a spacer.
Black surface radiates when airflow drops.
No coating to chip at fin edges.
No joint to interrupt conduction.
Handles outdoor and industrial service.
| Base Material | Aluminum, cold forged, black anodized |
|---|---|
| Material | Aluminum (grade per drawing) |
| Thermal Conductivity | 170-220 W/m-K depending on alloy |
| Finish | Black anodized, sealed |
| Electrical | Anodic film provides dielectric isolation |
| 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.
Two process limits decide the part: the forging die fixes fin thickness and count, and the anodizing rack fixes how the current reaches the fin field. Both are set on the first article, and film thickness is checked at the fin tips, not only on the base.
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.
Black anodized forged sinks suit both regimes - passive in still air, active behind a fan:
LED luminaires
Power electronics
Telecom equipment
Industrial control cabinets
Computing and server hardware
Send the load, the available airflow, the isolation requirement and the fixing pattern. KingKa sizes the fin field, forges the body and sets the anodic film to the dielectric value you need. The square pin version of the same body is the cold forged pin fin sink.
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.
State the isolation requirement with the drawing - anodizing thickness is chosen for dielectric strength, and a thicker film costs thermal resistance at the fin roots.
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.
