Extrusion

Le process extrusion consists of forming parts by transforming the material in an enclosure consisting of a sheath and at least one screw, then forming through a geometry die. There are many exclusion variants: extrusion-sheathing, extrusion-blowing, extrusion-inflation, extrusion-calendering, etc.

While industries commonly extrude various types of materials (plastics, rubber, metals, composites, clays, pasta, etc.), it is not uncommon to encounter defects in the extrudates, difficulties in pumping or conversely blockages of screws, particularly dreaded.

Adjusting an extrusion process, a subtle approach

While some numerical models work well for well-known single-component materials, these are nevertheless unconvincing for complex formulations. In addition, the modeling requires the quantification of numerous parameters, making the operation particularly onerous.

Thus, in practice, the adjustment of an extrusion process is most often carried out by trial and error, relying essentially on the know-how of the line operator. Unfortunately, this process can be tedious, especially for new products.

Faced with these limitations of usual practices, the innovative, efficient and proven approaches of RHEONIS constitute an alternative of interest both in the design phase, as well as in industrialization or problem solving.

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