On the surface, the process of extrusion is actually the forcing or thrusting out of an object. Within most industries, extrusion is used in tandem with molds and cutting mechanisms to create uniform, identically-shaped and formed objects. Thanks to this unique benefit, the extruder has become very popular with a number of industries.
Within the food industry, contract extrusion can have many applications. It can be used in the production and packaging of cereals, noodles, cookie dough, and many other items commonly found in grocery stores. Generally, two types of extruders are currently in use in today’s time. They are single screw extruders and twin screw extruders, respectively. Usually, the dual-screw machines are used to grind and mix ingredients before extruding them through a mold to the desired shape. But what’s the difference between the dual-screw machines and the single screw extruder? This is exactly what this post will be addressing. Read on, as I on behalf of will be listing a comparative discussion between these extruders. So, let’s get started.
Twin Screw Extruder And Single Screw Extruder: A Comparative Discussion!
On a twin-screw extruder, an engine powers two large, screw-shaped devices that rotate opposite one another. The distance between the two screws determines the size to which the ingredients are ground. The ingredients can also be heated or cooled throughout the food extrusion process.
On the other hand, single screw extruder has more widely usage for general plastic material and recycled plastic material extrusion which doesn’t care about the compounding ability. Due to the advantage of less heat of friction, more uniform shearing, larger conveying capacity of screw, more stable extrusion, the dual-screw machines is more preferred for plastic material compounding and modification.
Twin Screw ExtruderNowadays, twin-screw machine normally adopts more advanced electric controlling system, as PLC extrusion computer or cabinet. All of the main parameters of extruder, like current, voltage, temperature, torque, rotate speed, can be easily found in the extrusion computer or cabinet. Except this, twin-screw machine can alsoeffectively change the screw element combination and different accurate metering feeding hopper for various plastic material compounding.
Now let’s look at the compared study between single and dual screw extruders:
- The first point is lower energy consumption. The power consumption of the twin-screwmachines is about 30% lower than single rod extruder.
- The next one is excellent exhaust ability. This is self-cleaning function of intermeshing extruder make the material obtain a complete surface renewal during the degassing section.
- Next is the easy material feeding aspect! As the twin-screwmachines is transported by the principle of positive displacement material, so you can add high viscosity or very low material and ribbon, paste, powder and so on.
- Another very important aspect is the suitability of heat-sensitive materials. Material in the twin-screwmachines stay a short time with less heat friction. This makes it easier for extruder screw and barrel disassemble, clean and replace. Although, some extruder barrel also have self-cleaning function.
What Else?
So what else would you like to know about the twin-screw extruder and its benefits? Then just mention them in the comments section and I will be addressing them in the future posts. Also, if you are looking for one such competent system then just visit us at cfam.co.za today and explore our products.
