Did you know how many different types of extrusion processes ?

                     Did you know how many different types of extrusion processes ?

There are different types of extrusion processes

Cold extrusion is used to gently mix and shape dough, without direct heating or cooking within the extruder. In food processing, it is used mainly for producing pasta and dough. These products can then be subsequently processed: dried, baked, vacuum-packed, frozen, etc.

Hot extrusion consists of thermomechanically transform raw materials in short time and high temperature conditions under pressure. In food processing, it is used mainly to cook biopolymer-based raw materials to produce textured food and feed products, such as ready-to-eat breakfast cereals, snacks (savory and sweet), pet foods, feed pellets, etc.

Steam-induced expansion, means melt expansion at the die exit due to water flashing off, hence leading to highly expanded products. Subsequent processing then determines the textural attributes of extruded products such as crispness, crunchiness, hardness, etc. This process is used to produce directly expanded breakfast cereals, snacks and crispy breads.

Expanded co-extrusion combines steam-induced expansion and filling injection, hence leading to expanded products with dual textures. It is mainly used in breakfast cereals and snacks.