Applications Of Double Screw Extrusion Machine Technolog
The most common application is undoubtedly in snacks. Extrusion puffing technology can produce familiar snacks such as cheese puffs, corn curls, and extruded cereals. Gun puffing technology can produce puffed grains such as rice cakes, wheat squares, and corn puffs. Baking puffing technology can produce shrimp crackers and some types of crispbreads. Frying puffing technology can produce popcorn and pork rinds. This technology gives products an irresistible crispy texture, low density (large volume per unit weight), and a unique chewiness, while also enabling complex flavor infusion and coating application.
Beyond snacks, puffing technology is also crucial in the breakfast cereal sector. Puffed rice, wheat, and corn form the basis of many popular cereals, absorbing water quickly in milk, providing an appealing texture, and serving as ideal carriers for added sweeteners, flavors, and nutritional fortifiers. The light texture also improves packaging efficiency. Similarly, instant foods benefit greatly. Puffed grains or starches rehydrate almost instantly in hot water or milk, forming the basis of instant noodles (noodles are partially puffed during drying), instant soups, porridges, and baby foods, providing convenience without compromising taste.
A key and growing application is nutritional fortification. The porous structure of puffed materials acts like a sponge. This allows for highly efficient infusion of nutrients. Vitamins, minerals (such as iron and calcium), concentrated proteins, and even probiotics can be added to the matrix during processing or coated onto the porous surface after puffing. This allows for the production of nutritionally fortified snacks, cereals targeting specific nutritional deficiencies, or therapeutic foods for malnutrition intervention. This technology helps mask the undesirable flavors of added nutrients and improves their bioavailability. Extrusion technology has also found widespread application in the pet food and animal feed industries. Extruded pellets are the standard for dry pet food, offering comprehensive nutrition, dental health benefits through chewing, excellent digestibility, palatability, and a long shelf life. This process ensures starch gelatinization and protein denaturation, thereby improving nutrient bioavailability and killing pathogens. Similar principles apply to aquaculture feeds, where buoyancy and water stability are crucial.
Several specialized applications are currently emerging. Extruded ingredients, such as puffed rice or tapioca starch, are used as crispy additions in nutrition bars, yogurt toppings, or salads. The use of extruded isolated proteins to develop novel meat substitutes is being explored. Researchers are investigating the use of extruded starch as a biodegradable packaging filler or as a carrier for functional ingredients.
In summary, extrusion food technology is far more than just snack production. It is a versatile toolbox capable of creating foods with specific, desirable textures-from light and crispy to instantly soluble. Its applications span convenient snacks, nutritious breakfasts, life-saving fortified foods, efficient pet nutrition, and innovative ingredients. By controlling heat, pressure, and moisture, this technology continuously expands the possibilities of food science, delivering delicious, nutritious, and convenient food in an incredibly airy form. Its potential for further innovation in nutrient delivery and sustainable food production is immense.
Extruded snack food machines can produce puffed foods such as corn puffs and rice puffs. With the addition of extra equipment, it can also produce filled snacks, filled biscuits, breakfast cereals, corn flakes, etc. The extruded products are crispy, easily digestible, and have a unique texture. They are ideal snack foods for consumers.