Pressing
Learn how modern pressing technologies enable highly efficient heat sinks for electronics and liquid cooling – precise, efficient, and application-optimized.
Welding – Precision Joining Technology for Heat Sinks and Liquid Cooling Plates
Welding plays a central role in joining materials such as aluminum, copper, or stainless steel. It enables optimal tightness, precise heat dissipation, and meets the highest standards of strength, precision, and efficiency – ideal for liquid coolers and heat sinks in modern power electronics.
Learn more in a conversationWelding Methods
The variety of welding techniques allows different requirements to be met. From classic MIG/MAG or TIG welding to high-precision laser beam welding, welding enables the production of durable, thermally efficient, and mechanically robust cooling solutions.
COOLTEC Focus Area: Laser Beam Welding
In laser beam welding, a focused laser beam is directed onto the workpiece to precisely fuse materials together.
Benefits:
High precision due to concentrated heat zone
Minimal thermal expansion in adjacent areas
Narrow, deep-penetrating weld seams
Suitable for materials such as aluminum or copper
Friction Stir Welding (FSW) for Liquid Cold Plates
In friction stir welding (FSW), a rotating tool with a shoulder and pin is pressed into the joint line and moved along it. Frictional heat softens the material without melting it, and the pin stirs both parts into one continuous seam. Because there is no weld pool, porosity and hot cracking are avoided. The process is particularly suited to aluminum and is used on cold plates to seal a machined channel body to its cover. An exit hole remains at the end of the seam and is planned into the design.
Advantages for cold plates:
Leak-tight, pore-free seams without filler metal or shielding gas
Low heat input and little distortion, even on large plates
High seam strength
Suited to aluminum alloys that are hard to fusion-weld
For internally structured cold plates, we choose the joining method according to design and material: friction stir welding, laser welding, vacuum brazing or bonding.
View internally structured cold plates (Structureflow) →Thermal Performance & Stability in Welding
When welding heat sinks and liquid cooling plates, the metallic connection between components ensures efficient heat conduction and high mechanical stability. Copper tubes provide particularly effective heat dissipation, while aluminum is preferred for its low weight and good corrosion resistance.
Through precise welding techniques such as laser beam welding, even complex geometries can be joined accurately without thermal stress affecting adjacent areas. The result is customized, durable cooling solutions suitable for both prototypes and series production.
Learn more in a conversationEfficient Cooling for High-Performance Applications
With COOLTEC cooling solutions, you benefit from uniform heat distribution, reduced hotspots, and longer component lifespan.
