Method for producing a cooling element, and a cooling element

A method for manufacturing cooling elements for power electronic components and other electric appliances, comprising

• fabricating an insert package (2) of lamellas (5) by pressing together several lamellas (5) next to each other such that an air slot remains between the lamellas,
• positioning the insert package (2) in a recess (11) in a core part of a mould before closing the mould, whereby the package is adhered to the casting once the mould has been filled, and
• feeding a molten metal which at least essentially corresponds to the material from which the insert package of lamellas is made into the closed mould comprising a core part (10) and a mould part, the molten metal being allowed to set, whereafter the finished casting is removed from the mould,
• characterized by
• machining the insert package (2) such that it fits into the recess (11) in the core part (10) and at least one machined surface of the package (2) forms a tight joint between the core part (10) and the insert.