Custom heatsinks — the thermal route engineered before the metal is chosen
Extruded, cold-forged, die cast, skived or machined: each heatsink process has a thermal and economic sweet spot, and choosing wrong costs watts or money every unit. P&A International engineers the route from your heat load and airflow, then delivers through vetted partner plants in China — every supplier ISO 9000 certified or better.
One dedicated engineer owns your part from thermal sizing through tooling, production, anodising and assembly — including heat pipe and fan integration where the duty demands it.
consultancy + manufacture
per project, end-to-end
qualified samples with test data
every supplier certified or better
five thermal routes, one engineering call
Heatsink manufacturing routes
Extruded
The volume workhorse — custom fin profiles from ~USD 800 dies, cut, machined and anodised.
Cold-forged
Pin-fin and dense-fin geometries with superior thermal conductivity in 1070 aluminium or copper.
Die cast
Heatsink and housing in one shot — ideal for LED fixtures and enclosures at volume.
Machined & assembled
Skived and CNC heatsinks, heat-pipe embedding, fans, shrouds and thermal interface materials fitted.
Send the heat load, not a finished design — sizing feedback is part of every quote.
Engineering capability
- Thermal route selection: extrusion vs forging vs casting vs skiving, sized to your duty
- Custom extrusion fin profiles; fin ratios to ~25:1 via extrusion, higher by skiving
- Cold forging in Al 1070 and copper for pin-fin performance parts
- Heat pipe embedding (soldered or epoxied) and vapor chamber assemblies
- CNC machining of mounting patterns, steps and flatness-critical bases
- Anodising (clear, black for emissivity), chromate and powder coat
- Fan, shroud, TIM and hardware assembly — delivered as tested cooling modules
- Thermal validation: thermocouple testing against agreed test points on request
At a glance
| Processes | Extruded, forged, die cast, skived, machined |
| Materials | Al 6063/6061/1070, copper, Al + embedded heat pipes |
| Base flatness | To 0.05 mm machined where TIM demands it |
| Finishes | Anodise (black for radiation), chromate, powder |
| Volumes | Prototype singles to 100k+/year |
| Quality | FAI + dimensional report; thermal test on request |
Why engineers & buyers choose PA
For design engineers
Heatsink RFQs usually arrive over- or under-specified. Your engineer works from watts, ambient and airflow: confirms the fin geometry the duty needs, flags when a cheaper extrusion outperforms the forged part you priced elsewhere, and validates flatness where the interface matters.
For purchasing
One supplier from profile die to tested cooling module: itemised pricing, anodise consistency held to master samples, assembly under the same roof as the metalwork — through an ISO 9000 certified or better network with one accountable engineer.
3 easy steps to get started
Send the thermal duty
Watts, ambient, airflow (or fan), size envelope and mounting — a drawing if you have one.
Route + sizing proposal
Process recommendation with fin geometry feedback, tooling and part pricing.
Samples to volume
Measured first articles (thermal test optional), then production with finish consistency held.
Applications
Power electronics and inverters, LED luminaires, telecom and RF amplifiers, battery and EV systems, motor drives, audio amplifiers and industrial controllers — cooled by parts engineered to the duty, not picked from a catalogue.
Comparing processes first? See heatsink manufacturing routes compared. Related: custom heat pipes, aluminium extrusion and die cast housings.
Which heatsink process fits?
The sweet spots, honestly stated:
| Extruded | Most duties, best cost — limited by fin ratio and width |
| Cold-forged | Pin fins, omnidirectional airflow, high conductivity alloys |
| Die cast | Heatsink-as-housing at volume; thermal conductivity lower |
| Skived | Very high fin density from solid — when extrusion cannot |
| Machined | Prototypes, low volume, or flatness-critical bases |
What to send us for a fast, accurate quote
The more of this you can share, the quicker we can return a proposed thermal route and price:
- Heat load (W), ambient and allowable rise
- Airflow: natural, forced (CFM), or fan to integrate
- Size envelope and mounting interface
- Quantities and target piece price if known
- Existing drawing or competitor part if any
No thermal data? Send the device datasheet and the enclosure — sizing starts there.
Get a quote
Describe what you are cooling and one dedicated engineer will reply with a process recommendation, sizing feedback and itemised pricing.
One dedicated engineer reviews every enquiry and replies with a proposed thermal route and indicative pricing. Your details are used only to respond to your enquiry. Prefer email? support@pa-international.com.au