Process

There are several different extrusion methods. Direct and indirect extrusion are semi-continuous extrusion processes that take a variety of factors into consideration, including ingot weight, extrusion weight, extrusion profile length and cycle authorisation times.

ProfilGruppen uses Direct Extrusion.

There are also continuous extrusion processes, which are only used for small extrusions and simple pipes. However, the one thing all extrusion processes have in common is that the shaping process occurs during the brief moment the material passes the shaping pin in the tool.

This is central to all extrusion pressing. In order to secure a process with a sustainably high level of accuracy, tools must be precisely adjusted and utilised.

In addition, process parameters must be carefully checked in order to ensure a high level of quality in production.

Processen_Fig1

Set-up time

One of the advantages of extrusion pressing is the short set-up times. This is directly associated with the semi-continuous nature of the process. Each new ingot marks the start of a new process cycle. When changing an extrusion in production, you only need to swap out the tool.

To do this, the press is equipped with a Die-Slide system. This enables a new tool to be prepared whilst a process is in progress. When the tool is changed, the old tool is removed at the same time as the new tool is inserted in position for pressing.

The removed tool can also be cleaned whilst the process is in progress. This means that turnaround and touching up do not bring the process to a halt.

Additional work associated with extrusion changes during production such as a change in ingot length, alloy changes and changes in ingot temperature can also be completed in advance.