Extruded Heatsinks  Manufacturers, Traders, Suppliers

Fischer Elektronik, founded in 1968, is one of Europe’s leading manufacturers of electro-mechanical components such as heatsinks, enclosures, connectors and thermal interface materials.
At our headquarters in Lüdenscheid, North Rhine-Westphalia, which covers an area of 28,000 m², over 400 employees ensure manufacturing under optimal conditions.
The application of the most modern techniques and production processes as well as the continuous development of new products are of utmost importance to us.
Our standard product portfolio comprises over 75,000 items, which can be easily traced in our well-known catalogues.
Besides our vast standard portfolio, we are specialized in offering customer-specific solutions, either based on our standard items or completely new developments.
Our extraordinary production depth allows to put almost every customer demand into practice.
Highest quality and environmental awareness belong to our company’s philosophy and are practiced throughout the entire enterprise
Since 1994, Fischer Elektronik is certified according to ISO 9001 for its quality management system and has obtained its certificate according to ISO 14001 for its environmental management system shortly after in 1998. Since 2011, Fischer Elektronik is also certified according to DIN ISO/IEC 27001 for its information security management system..

A heat dissipation device that compresses aluminum ingots into specific shapes through high temperature and high pressure. It has the characteristics of lightweight, high thermal conductivity, and customization
Mainly made of 6061 and 6063 aluminum alloys, with a thermal conductivity of 160-180 W/m · K

1、Material and mold parameters
Aluminum material selection:
The commonly used AA6063 aluminum alloy has a thermal conductivity of 160-180 W/m · K. It is necessary to ensure that the surface of the ingot is smooth and free of segregation nodules, and the flatness error of the end face is ≤ 3mm.
The recommended length of the ingot is 0.6-0.85 times the normal length, and short casting rods (0.4-0.6 times) are preferred during mold testing.
Mold requirements:
Using H13 steel or imported high-quality steel, vacuum heating quenching+high-pressure pure nitrogen quenching, hardness HRC48-52.
The mold design needs to control the fin thickness to length ratio to be ≤ 1:18, and the rationality of the working zone needs to be verified through simulation for complex cross-sections.
2、 Extrusion process parameters
Temperature control:
The heating temperature for aluminum ingots is 480-520 ℃, and the heating temperature for molds is 480 ℃ (with a diameter of less than 200mm and insulation for ≥ 2 hours).
The temperature difference between the mold and the ingot should be ≤ 50 ℃ to avoid mold blockage caused by a decrease in metal temperature.
Pressure and speed:
Initial pressure ≤ 8MPa, low-speed trial mold (discharge for 3-5 minutes), normal production pressure ≤ 120kg/cm ².
The extrusion speed should be stable to avoid sudden acceleration causing tooth breakage or uneven discharge.
3、 Post processing and detection
Timeliness processing:
The aging temperature is 190 ± 5 ℃, and the insulation time is 2.5-4 hours. After being taken out of the furnace, it is air-cooled
Quality inspection:
Dimensional tolerance: ± 0.1mm (national standard requirement).
Surface defects: The oxide slag should be ≤ 0.1mm, and the micropore rate should be ≤ 3%
4、 Process optimization direction
Reduce extrusion pressure: Reduce the risk of tooth breakage by shortening the ingot length and optimizing the mold flow design
Improving heat dissipation efficiency: using serrated or buckle Fin technology to break through the limitation of fin aspect ratio (up to 1:60)

1. Heat sink of electronic devices
Computer hardware: The CPU/GPU heat sink achieves a dense fin structure through extrusion technology, increasing the heat dissipation area by more than 30%.
LED lighting: High thermal conductivity aluminum extruded profiles effectively reduce the temperature of lamp beads and extend their lifespan to 50000 hours.
5G base station: The RF module heat sink adopts a multi cavity extrusion design to meet the high power density heat dissipation requirements.
2. New energy vehicles
Battery pack cooling: Aluminum extruded profiles serve as the liquid cooling plate substrate, with a thermal conductivity of 200W/(m · K) and a weight 60% lighter than copper.
Motor controller: Integrated extruded heat sink achieves dual modes of air cooling/liquid cooling, reducing operating temperature by 15 ℃.
3. Industrial equipment
Power electronics: Inverters and transformer radiators achieve complex cross-sections through extrusion technology, with a withstand voltage rating of IP67.
Automated machinery: The servo drive heat sink adopts modular extrusion design, supporting rapid assembly.
4. Other fields
Photovoltaic inverter: Lightweight aluminum extruded heat sink suitable for outdoor installation, with weather resistance of over 10 years.
Rail transit: IGBT radiators for trains achieve high reliability through extrusion and welding processes.

In electrical design, heat sink and thermal design are an important link.
We can provide customers with various types of heat sink design, production and free thermal design services.
Including thermal design, thermal simulation, various types of heat sink design, water cooling plate water channel design, etc.
We have more than 20 years of experience in heat sink design and production.
We have extrusion machines, friction stir welding, CNC, skived fin equipment, insert fin equipment and other professional equipment to produce various types of heat sinks.
We can bring the following value to our customers:
1. Shorten the customer's new product design cycle and reduce the workload of the customer's design team;
2. Reduce customers’ new product testing costs.
3. Reduce customers’ heat dissipation costs through lightweight design of heat sinks.
Our technical team provides heat sink products and thermal design services to Hitachi, Delta, FUJI, ABB and many other companies.