Extrusion of petfood and treats
Thanks to its balanced relation between free volume and high speed range, the ZSK MEGAvolume PLUS is especially suitable for the economical processing of dry and semi-dry dog and cat food and treats. Throughput rates up to 15 t/h with very good wear and corrosion protection for the installed components ensure an extremely economical production process within a very wide range of recipes.
Steam is added directly to the ZSK by pre-conditioning or steam injection depending on the application. The compound is boiled and pasteurized with other additives under gentle conditions at low pressures in the plasticizing zone. Shear-sensitive powdery additives can be added by side feeders downstream. This bypasses the boiling zone and the active ingredients are mixed in extremely gently.
The introduced energy and the resulting degree of gelatinization influences the texture of the product which is extruded through a die plate or nozzle at the end of the extruder. Pelletized products are dried in the downstream plants and coated optionally with fat, oil or aromas. Treats are cooled and cut to length after emerging from the nozzle.