Thixomolding

Thixomolding uses solid chips that are compressed, heated and mixed into a semi-solid material before being injected into the die with the extruder.

Dynathixo combines Dynacast’s cold chamber process with a thixomolding extruder to mix solid chips in the pressure chamber, using a cold chamber plunger and hydraulic system for robust operation.

The Dynathixo process involves feeding magnesium alloy chips into a heating chamber, where they are mechanically processed and sheared by a rotating screw inside a barrel, transforming them from a dendritic to a globular state. The semi-solid material is then injected into a preheated mould under high pressure, allowing for thinner walls and lower porosity.

The Dynathixo process optimises energy efficiency by heating the material at a lower temperature and eliminates the need for inert gases, reducing both energy consumption and CO2 emissions. Additionally, since the Dynathixo machine only requires a nozzle tip, it achieves an excellent shot weight ratio without the need for a tablet rest.