... tooling,extrusion,CNC precision machining & finishing Aluminum Heatsink with balck anodizing and CNC high-precison machining,aluminium radiator, alumnium machining parts, ... procedureDie desiging→Die making→Smelting&alloying→Extruding→Cutting→CNC machinig→Driling→Tapping→Surface treatment→Welding→Assembling→ ... extrusion cost (USD 700~950 per ton)3.machining(to be subject the detailed product,contact us ...