tvillingskruvar

Tvillingskruvar, also known as twin-screw extruders, are a type of positive displacement machine used in various industries, particularly in plastics processing, food manufacturing, and chemical production. They consist of two intermeshing screws that rotate in the same direction within a barrel. This co-rotating design creates a series of sealed chambers that move material forward along the barrel.

The primary function of a tvillingskruv is to convey, melt, mix, and homogenize materials. As the screws rotate, they trap material in the spaces between the screws and the barrel. This material is then transported axially. The intermeshing nature of the screws provides a self-wiping action, which is beneficial for processing heat-sensitive materials and prevents buildup.

Tvillingskruvar are highly versatile due to their ability to control shear, temperature, and residence time precisely. They are commonly used for compounding polymers, where additives are blended with base resins. In the food industry, they are employed for processes like snack food production, pasta extrusion, and texturizing of plant-based proteins. Chemical applications include the synthesis and processing of reactive materials. The design of the screws, including their pitch, depth, and flight configuration, can be customized to suit specific material properties and processing requirements. This adaptability makes tvillingskruvar a valuable tool for complex material processing tasks.