KINGKA Tech Industrial Limited, founded in 2010, is a professional manufacturer specializing in aluminum alloy thermal management solutions. Our Cold Forging Heat Sink is designed for applications requiring high heat dissipation, compact structures, high fin density, and excellent mechanical strength.
Manufactured through a precision cold forging process, aluminum or copper blanks are formed under high pressure at temperatures below the material's recrystallization temperature. This process produces dense, precisely formed fins with excellent dimensional consistency and efficient heat transfer performance.
Compared with conventional extruded heat sinks and die cast heat sinks, a cold forged heat sink can achieve thinner fins, higher fin density, and optimized fin geometries, making it suitable for high-power electronics and space-constrained thermal management applications.
Cold forging is a metal forming process in which aluminum or copper material is pressed into a precision die without melting the material. The material undergoes plastic deformation and work hardening, creating a rigid heat sink structure with high dimensional accuracy.
During cold forging, the metal flows into the die cavity to form the base and fins. This manufacturing method allows the production of straight, thin, and densely arranged fins while maintaining good material integrity.
The process is particularly suitable for aluminum and copper alloys because these materials provide good ductility, thermal conductivity, and formability.
The fin geometry is one of the most important factors affecting heat sink performance. Cold forging allows manufacturers to create higher fin density and thinner fin structures than many conventional manufacturing methods.
A greater effective surface area allows more heat to be transferred from the heat sink to the surrounding air. Fin height, thickness, pitch, aspect ratio, and airflow direction can therefore be optimized according to the required thermal resistance.
Aluminum and copper provide excellent thermal conductivity for electronic cooling applications. Typical thermal conductivity is approximately 180–220 W/m·K for selected aluminum alloys and 380–400 W/m·K for copper, depending on the specific alloy and condition.
The cold forging process also creates a dense metal structure, supporting efficient heat conduction from the thermal interface to the fins.
One of the major advantages of a cold forged heat sink is its ability to form thin and closely spaced fins.
Higher fin density increases the available heat dissipation area within a compact footprint, making the technology suitable for power electronics, LED modules, telecom equipment, and other high-power-density devices.
Cold forging causes work hardening, which can improve the strength and hardness of the formed material. The resulting heat sink provides good structural rigidity while maintaining a lightweight design when aluminum is selected.
Depending on the die design, cold forging can produce straight fins, pin fins, elliptical fins, circular fins, and other customized structures. These geometries can be optimized for natural convection or forced-air cooling.
Because cold forging forms the material directly into the required geometry, it can reduce material waste compared with some subtractive machining processes. This makes it particularly attractive for high-volume production.
Precision tooling allows repeated production of heat sinks with consistent fin height, fin thickness, base dimensions, and overall geometry, which is important for automated assembly and large-scale production.
Cold forged heat sinks and extruded heat sinks are both widely used for air-cooled thermal management, but their manufacturing characteristics differ.
Cold forging can produce higher fin density, thinner fins, and specialized fin geometries. It is particularly advantageous when compact dimensions and high surface-area-to-volume ratios are required.
Extrusion is generally more suitable for long continuous heat sink profiles and applications where the cross-section remains consistent along the entire length.
The appropriate process depends on heat load, fin geometry, production volume, dimensional requirements, and target cost.
Aluminum is the most commonly selected material because it combines good thermal conductivity, low density, corrosion resistance, and excellent manufacturability.
Common aluminum options include:
AL1050
AL6061
AL6063
Aluminum cold forged heat sinks are widely used for LED lighting, telecom equipment, industrial electronics, power supplies, and automotive electronics.
Copper provides significantly higher thermal conductivity than aluminum and is suitable for applications with high heat flux or demanding thermal requirements.
Common copper materials include C1100 and C1020.
Copper cold forging can be used for compact high-performance heat sinks, power electronics, semiconductor cooling, and other applications where rapid heat spreading is important.
| Parameter | Specification |
|---|---|
| Product | Cold Forging Heat Sink |
| Manufacturing Process | Cold Forging + CNC Machining |
| Material | AL1050 / AL6061 / AL6063 / C1100 / C1020 |
| Thermal Conductivity | Aluminum: 180–220 W/m·K; Copper: 380–400 W/m·K |
| Fin Height | 5–80 mm, customizable |
| Fin Thickness | 0.5–3 mm, depending on design |
| Overall Size | Custom, typically 80 × 80 mm to 400 × 400 mm |
| Flatness | ≤0.05 mm |
| Operating Temperature | -40°C to +120°C |
| Cooling Method | Natural Convection / Forced Air Cooling |
| Thermal Resistance | Application-dependent; optimized according to design |
| Surface Treatment | Anodizing / Nickel Plating / Powder Coating / Sandblasting |
| Machining | CNC Milling / Drilling / Turning |
| Mounting | Threaded Holes / Screws / Thermal Interface Materials |
| Customization | OEM / ODM / Custom Design |
| Certifications | ISO 9001:2015 / RoHS / CE |
Actual thermal performance depends on heat load, ambient temperature, airflow velocity, fin geometry, thermal interface resistance, and installation conditions.
Aluminum or copper blanks are selected according to the required thermal conductivity, mechanical strength, dimensions, and production requirements. Material composition and surface quality are inspected before forming.
The cold forging die is engineered according to the required heat sink geometry. Fin height, fin thickness, fin pitch, base thickness, draft, and material flow are considered during tooling development.
The metal blank is placed into the precision die and formed under high pressure. The material plastically deforms and fills the die cavity to create the base and cooling fins.
Unlike die casting, cold forging does not require the metal to be melted. This helps maintain material integrity and can improve mechanical properties through work hardening.
After forging, critical surfaces can be CNC machined to achieve the required flatness, dimensional tolerance, mounting holes, threads, and thermal interface surface.
Depending on the application, the finished heat sink can undergo anodizing, nickel plating, powder coating, or sandblasting. Black anodizing is commonly used for aluminum heat sinks where corrosion resistance and surface protection are required.
Finished products can undergo dimensional inspection and thermal performance testing. For demanding applications, thermal resistance, temperature rise, flatness, and mounting interfaces can be verified according to customer specifications.
A custom cold forging heat sink should be designed according to the actual thermal requirements rather than only the available mechanical space.
Important design parameters include:
Heat load in watts
Maximum allowable component temperature
Ambient temperature
Airflow velocity
Fin height
Fin thickness
Fin pitch
Fin density
Base thickness
Thermal interface material
Installation orientation
Our engineering team can optimize the fin structure to achieve a suitable balance between thermal resistance, pressure drop, mechanical strength, weight, and manufacturing cost.
KINGKA supports OEM and ODM cold forged heat sink production based on 2D drawings, 3D CAD models, samples, or application requirements.
Our services can cover:
Thermal design
3D modeling
Tooling development
Prototype production
CNC machining
Surface treatment
Thermal testing
Mass production
Quality inspection
Cold forged heat sinks are used for IGBT modules, MOSFETs, rectifiers, power supplies, converters, inverters, and other high-power semiconductor devices.
High-density forged fins provide a large heat dissipation area for LED modules, LED drivers, high-power lamps, street lights, and industrial lighting systems.
Compact cold forged heat sinks can be integrated into base stations, communication modules, RF equipment, routers, and other telecom systems.
Applications include automotive power electronics, EV control systems, power converters, motor controllers, and battery-related electronic systems.
Cold forged heat sinks are suitable for industrial controllers, variable-speed motor drives, welding equipment, laser power supplies, and automation equipment.
The lightweight structure and high thermal performance of aluminum cold forged heat sinks make them suitable for compact aerospace electronics, medical instruments, and precision electronic systems.
KINGKA Tech Industrial Limited combines cold forging, CNC machining, surface treatment, and thermal testing capabilities to provide complete heat sink manufacturing services.
With experience in thermal management, we can develop customized cold forging heat sinks based on your heat load, installation space, airflow conditions, material requirements, and production volume.
From prototype tooling to mass production, our goal is to provide reliable and cost-effective thermal management solutions for demanding electronic applications.
A cold forged heat sink is a thermal management component manufactured by pressing aluminum or copper into a precision die at temperatures below the material's recrystallization temperature. The process forms high-density fins for efficient heat dissipation.
Aluminum alloys such as AL1050, AL6061, and AL6063 are commonly used. Copper alloys such as C1100 and C1020 are selected when higher thermal conductivity is required.
Cold forging can produce thinner and denser fins, specialized fin geometries, and high dimensional consistency. Extrusion is generally more suitable for long profiles with a constant cross-section.
Yes. We provide custom cold forged heat sinks according to customer drawings, CAD models, samples, thermal requirements, and mechanical specifications.
Yes. With optimized fin density, material selection, and thermal interface design, cold forged heat sinks can be used for IGBT modules, power supplies, inverters, LED systems, telecom equipment, and other high-power electronics.
Yes. CNC milling, drilling, tapping, and precision machining can be performed on critical surfaces to achieve the required mounting and dimensional tolerances.
Kingka Tech Industrial Limited
We specialize in Heat Sink、Liquid Cold Plate、precision CNC machining and our products are widely used in telecommunication industry, aerospace, automotive, industrial control, power electronics, medical instruments, security electronics, LED lighting and multimedia consumption.
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Da Long New Village, Xie Gang Town, Dongguan City, Guangdong Province, China 523598
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