The first stage inputs energy in a high intensity mixing phase; the second allows the energy and moisture to equalise throughout the preconditioned mass, eliminating any tendency to clump and achieving a mix profile for successful extrusion processing.
It adds flexibility in the cereal and snack sectors when applied to denser materials such as half products formed in the extruder and expanded elsewhere – flaked cereals and multi-grain loops are typical. It is also ideal for high-protein products where energy input in the Preconditioner replaces mechanical shear energy in the extruder.
Hygiene levels are high: a wash-in-place water spray system is an option and there is unrestricted access for manual cleaning.
