Lämpöekstrusio

Lämpöekstrusio, also known as thermal extrusion, is a manufacturing process where a material is heated and then forced through a die to create a desired shape. This method is commonly used for plastics, metals, and ceramics. The process begins with heating the raw material to a temperature at which it becomes malleable but not liquid. This softened material is then subjected to high pressure, which forces it through a specially shaped opening called a die. The die determines the cross-sectional profile of the extruded product. As the material exits the die, it cools and solidifies, retaining the shape imparted by the die.

The primary advantage of thermal extrusion is its ability to produce complex cross-sections with high precision and consistency. It is an efficient method for continuous production of long products such as pipes, rods, profiles, and filaments. The process can also be used to create hollow shapes by employing a die with a core or mandrel. Different types of extrusion exist, including direct extrusion, where a ram pushes the material through the die, and indirect extrusion, where the die moves towards a stationary billet. The specific parameters, such as temperature, pressure, and extrusion speed, are critical for achieving the desired material properties and dimensional accuracy in the final product.