Mäntäekstruusio

Mäntäekstruusio, also known as ram extrusion, is a manufacturing process used to shape materials, primarily metals, into desired profiles. In this method, a solid billet of material is placed within a chamber, and a hydraulic ram or piston exerts significant force to push the material through a die with a specific cross-sectional shape. The die acts as a mold, dictating the final form of the extruded product.

This process is particularly well-suited for producing long, continuous shapes with complex cross-sections that are difficult or impossible to achieve through other methods like rolling. Common materials for mäntäekstruusio include aluminum, copper, magnesium, and various alloys. The high pressures involved allow for the deformation of even strong metals.

The resulting extruded products can range from simple solid rods and bars to intricate hollow sections and complex profiles used in industries such as aerospace, automotive, construction, and electronics. The surface finish and dimensional accuracy of mäntäekstruusio products are generally very good, often requiring minimal post-processing.

Mäntäekstruusio can be performed either hot or cold, depending on the material's properties and the desired outcome. Hot extrusion involves heating the billet to a specific temperature, which reduces its strength and makes it more pliable, facilitating easier extrusion. Cold extrusion, performed at or near room temperature, results in work hardening of the material, leading to increased strength and improved surface finish but requiring more force.