Injection Molding
Tooling and molding for your repeat plastic parts.
YOUR DRAWING · YOUR OPERATING CONDITIONS
Skived Fin Heat Sinks
for Your Fin Spacing, Base & Airflow
Review your thin-fin geometry before you commit to a dense fin stack. Match material, fin pitch, base thickness and installed airflow to your mounting envelope and sample acceptance plan.
Illustrative component concept
Heat load
Power, ambient & airflow
Interfaces
Contact face & mounting
Manufacturing
Material, route & quantity
Acceptance
Sample, checks & records
Start with Your Assembly Requirements
Thin fins need a usable air path and a handling plan. Review both before approving your skived fin heat sink prototype.
- Fit the available mounting envelope
- Identify your real heat-source footprint
- Use installed airflow and orientation
- Review material and one-time tooling costs
- Agree the sample and inspection evidence
Mounting features
Allow tool and fastening access around your hole pattern.
Contact faces
Define the device footprint, TIM and clamping stack.
Fins and airflow
Review channel clearance in the installed assembly.
Samples and repeat supply
Agree handling, sample checks and the released revision.
One Continuous Base-to-Fin Path
Illustrative component concept
Skiving forms fins from the parent metal rather than attaching separate fins to a base. For your skived fin heat sink, review the usable fin height, thickness, spacing and the material condition together; feasible limits are confirmed from your drawing.
- Define the heat-source footprint and available volume.
- Review critical geometry before material and tooling commitment.
- Approve a route-specific sample and controlled drawing.
Compare 4 Manufacturing Routes for Your Geometry
Choose the route around your material, interfaces and order quantity. Drawing review confirms availability and manufacturing scope for your part.
CNC-Machined Heat Sinks
Review interrupted geometry, tool access, fin rigidity and material removal.
Review this route →
Skived Fin Heat Sinks
Review integral thin fins, material condition and installed airflow.
Review this route →
Extruded Heat Sinks
Compare an available section with a new die; specify cutting and machining.
Review this route →
Bonded Fin Heat Sinks
Review separate fins, base grooves, joint construction and agreed checks.
Review this route →Resolve 6 Fit & Airflow Questions Before Production
Define your operating conditions and mating features before selecting a manufacturing route.
Define Your Device Contact
Your contact area, TIM and clamping condition determine which face needs a flatness requirement. Specify the datum and measurement state.
01
Device footprint and keep-outs
02
TIM and insulation stack
03
Datums and final inspection
04
Clamping and assembly condition
Match Your Fins to the Air You Have
Specify skived heat sink fin thickness, clear fin spacing, fin height and base thickness. Add the contact footprint and mounting datums. More fins can increase surface area while restricting flow; review the installed fan operating point and bypass path.
Do not select fin density from appearance alone. Review installed flow, fan pressure, bypass and orientation.
01
Fin thickness and clear spacing
02
Flow direction and fan curve
03
Duct and bypass clearance
04
Thermal test operating point
Keep Your Part Accessible for Assembly
Review mounting holes with fasteners, tools, cable routes and the contact plane. Include the mating specification.
01
Hole pattern and threads
02
Fastener and wrench access
03
Module and cable keep-outs
04
Assembly datum scheme
Select Your Full Grade and Condition
Compare conduction, mass and manufacturing feasibility. A material property does not alone establish device temperature.
01
Grade and product standard
02
Temper or copper condition
03
Mounting load and mass
04
Sample material evidence
Control the Surface That Meets Your Device
Review finish and masking with your thermal, electrical and dimensional interfaces. Apply coating requirements only to suitable substrates.
01
Coating and thickness
02
Thermal and electrical pads
03
Threads and precision fits
04
Burrs and final cleanliness
Agree Your Evidence Before Release
Separate material identity, dimensional inspection and system thermal validation. State what your quotation and sample approval include.
01
Controlled drawing revision
02
Critical dimensions and fit
03
Defined thermal conditions
04
Sampling and required records
Compare Material Data Before Your Cooling Decision
Use bulk material properties to compare conduction and mass. Your finished part still needs geometry, mounting and airflow review; these figures are not LK MFG heat sink test results.
Typical thermal conductivity
6061-T6: Hydro, 25°C. 6063-T5: Gabrian typical value. Cu-ETP: KME, annealed at 20°C.
Density: check your mounting load
For the same metal volume, Cu-ETP is approximately 3.30× the mass of aluminum. Geometry changes the finished-part mass.
| Grade | European designation | Si | Mg | Cu | Fe | Mn | Cr | Zn | Ti | Al |
|---|---|---|---|---|---|---|---|---|---|---|
| 6061 | EN AW-6061 · AlMg1SiCu | 0.40–0.80 | 0.80–1.20 | 0.15–0.40 | ≤0.70 | ≤0.15 | 0.04–0.35 | ≤0.25 | ≤0.15 | Balance |
| 6063 | EN AW-6063 · AlMg0.7Si | 0.20–0.60 | 0.45–0.90 | ≤0.10 | ≤0.35 | ≤0.10 | ≤0.10 | ≤0.10 | ≤0.10 | Balance |
| C11000 | Cu-ETP · CW004A | — | — | ≥99.90 | — | — | — | — | — | — |
Copper designation: UNS C11000 ↔ Cu-ETP / CW004A; KME composition: Cu ≥99.90%, O ≤0.040%. Confirm standard, product form and material condition. The designation is a grade-family reference, not blanket interchangeability with every “C1100” or “1100” label.
The dash (—) means not specified in this selected-element summary, not zero. For aluminum: other elements ≤0.05% each / ≤0.15% total. Values are reference limits; the ordered standard and material certificate govern. Confirm grade and temper feasibility for skived fin heat sinks.
Material sources: Hydro 6061 · Gabrian 6063 · KME Cu-ETP
Review Your Surface Finish
Specify the visible surfaces and functional contacts separately. No coating gives a universal cooling improvement. Protect thin fin edges during masking, coating and handling.
Confirm alloy, surface preparation, film and masking.
Specify appearance and keep thermal or electrical contacts controlled.
Review substrate preparation, coating thickness and required contact surfaces.
As-machined surfaces and selective coatings are reviewed against your drawing. Powder coating needs specific review of fin gaps, thickness and masked contact areas. Anodizing applies to aluminum, not copper.
Define Your Functional Features
Put the dimensions that control fit and heat transfer on your drawing.
Mounting holes
Hole pattern, datums and assembly loads
Threaded holes
Thread standard, depth and tool access
Slots & cutouts
Cable clearance, fixtures and interruptions
Contact surfaces
Footprint, flatness and surface condition
Base & fins
Base thickness, fin envelope and usable air path
Read Your Thermal Evidence Under the Same Conditions
Three views for your review: a calculation, a resistance budget and a heat-path diagram. All examples below are illustrative—not measured part performance or a CFD result.
1 · Power and temperature rise
Example only: ΔT = Q × R. At a hypothetical R = 1 K/W, 50 W gives a 50 K rise. R must come from your defined path and actual operating conditions.
2 · Set the resistance budget
Illustrative allowable total R = (75°C − 25°C) / Q. This is a 50 K budget from the chosen reference point to ambient; include interfaces on that path.
3 · Follow the heat path
YOUR HEAT SOURCE↓TIM & CONTACT FACE↓BASE → FINS → AIR
Review contact, spreading and convection together. For a measured curve or CFD report, agree the geometry, heat source, airflow, orientation and validation scope first.
For your acceptance report: define power, heat-source area, TIM and mounting, sensor positions, ambient, installed airflow or velocity, orientation and stabilization. Do not compare CFM, LFM and fan free-air ratings as interchangeable conditions.
5 Checkpoints from Drawing to Repeat Supply
Drawing
Confirm revision and critical interfaces.
Route review
Agree material, geometry and manufacturing scope.
Sample
Check your finished part and assembly fit.
Evidence
Review agreed dimensions and separate thermal test scope.
Repeat supply
Release the approved revision and packaging.
Protect Your Thin Fins Through Delivery
Illustrative component concept
Your skived fin heat sink prototype needs both dimensional review and a handling plan. Agree allowable fin deformation, contact-face protection, separated packaging and receiving checks. Confirm any skived heat sink thermal resistance test as a separate scope with defined airflow and orientation.
- Material identity and controlled drawing revision
- Contact faces, mounting dimensions and fit
- Finish, burrs, fin condition and protection
- Agreed records, sampling and shipment release
Applications to Review for Your Part
Project suitability, manufacturing scope and required records are confirmed from your drawing. These are application review topics, not customer case studies or system certifications.
Industrial automation
Review control cabinets, motor-drive enclosures and service access.
Power electronics
Match the module footprint, mounting load and insulation.
EV & charging
Review device heat load, mounting and environmental conditions.
Telecom equipment
Review airflow direction and the available enclosure volume.
LED lighting
Specify the board interface, orientation and ambient conditions.
Server components
Review the exact device and installed airflow; no generic fit assumption.
Test equipment
Plan instrument clearances, fixture mounting and service access.
Energy systems
Review power modules, ambient range and the assembly envelope.
6 Inputs for Your Skived Heat Sink Quote
- CAD + controlled drawing
- Heat load + temperature target
- Airflow + installation orientation
- Contact face + mounting interfaces
- Material, temper + finish
- Sample quantity + repeat demand
Your quote should identify tooling, component manufacture, finishing, inspection and any separately agreed thermal validation. Manufacturing in China with Dallas-area coordination.
Answers Before You Specify
What drawings are needed to quote a skived fin heat sink?
Include the base outline, fin thickness, clear spacing, height, material and condition, mounting holes, contact face, quantity and installed air conditions. Identify critical dimensions and the acceptance method.
Does higher fin density always improve a skived heat sink?
No. Narrow channels can restrict usable airflow. Review fin efficiency, fan pressure, ducting, bypass and orientation rather than choosing fin count alone.
Can thin skived fins be protected during shipping?
Agree supports around the base, clearance around the fin tips, separators and receiving criteria. Packaging should avoid transferring stacking or clamping loads into the fins.
Should I choose copper or aluminum?
Review heat spreading, mass, mounting load, geometry and material availability. A higher bulk conductivity does not alone establish the final device temperature.
Can mounting holes be added after skiving?
Identify the hole positions, thread depth, tool access and protection of the finished fins. Confirm the secondary machining sequence and final contact-face inspection.
What should a skived heat sink test report include?
Specify heat-source size and power, mounting and TIM, sensor locations, ambient conditions, airflow or velocity, orientation, stabilization criterion and the thermal-resistance path.
