What products are made by extrusion?

Extruded products are mostly manufactured without plasticizers (rigid), which includes all major products such as window and door profiles, siding, and pipes, and many other products such as blinds, clear compounds, fencing, interior profiles, planks, and sheets.

What is extrusion example?

Materials that are commonly cold extruded include: lead, tin, aluminum, copper, zirconium, titanium, molybdenum, beryllium, vanadium, niobium, and steel. Examples of products produced by this process are: collapsible tubes, fire extinguisher cases, shock absorber cylinders and gear blanks.

What is meant by extruded snacks?

Extrusion cooking is the process extensively used for the production of snacks which are mainly produced from cereal flour or starches. Extruded snacks are normally high in calories and fat with low content of protein, fiber, and perceived as unhealthy food to many consumers.

Where is extrusion used?

Extrusion is a metal forming process in which metal or work piece is forced to flow through a die to reduce its cross section or convert it into desire shape. This process is extensively used in pipes and steel rods manufacturing. The force used to extrude the work piece is compressive in nature.

What are the advantages of extrusion cooking?

Extrusion cooking is thus one of the preferred food-processing techniques due to its continuous process with high productivity, high temperature and short time cooking period while destroying both harmful microbial organisms and anti-nutrient enzymes, resulting in significant nutrient-retention products with longer …

What is an extruded diet?

Another diet form is an extruded diet, which is similar to the pelleted diet. As with the pelleted diet, steam is injected into the ground meal, however, with the extruded diet, pressure and a higher temperature are used to force the meal through a die.

What are some examples of extruded food products?

Extruded products are widely consumed by consumers in different forms. Cereals, snacks, noodles & pastas, baby food, frozen food, and others are some extruded products consumed daily. Innovative packaging plays a vital role in boosting the sales of these food products.

How is extrusion used in the food industry?

Extrusion of foods is an emerging technology for the food industries to process and market a large number of products of varying size, shape, texture, and taste.

How are the quality characteristics of extruded foods determined?

The processing variables, such as feed rate, screw speed, barrel pressure, and temperature, determine the quality characteristics of extruded snacks that determine the acceptability of that product ( Harper, 1981 ).

Where does the cooking process take place in a food extruder?

The cooking process takes place within the extruder where the product produces its own friction and heat due to the pressure generated (10–20 bar). The process can induce both protein denaturation and starch gelatinization under some conditions. Many food extrusion processes involve a high temperature over a short time.