How to choose the extruder barrel screw? There are many […]
How to choose the extruder barrel screw? There are many factors that affect the selection of the extruder barrel screw. If the extruder barrel screw is improperly selected, it will lead to insufficient working strength and shorten its working life. Let's analyze how to choose the extruder barrel screw based on 4 factors.
1. Adaptability, the so-called adaptability of the screw refers to the adaptability of the screw to process different plastics, match different heads and different products. Generally speaking, the stronger the adaptability, the lower the plasticizing efficiency is.
2. It is difficult to manufacture, a good screw must also be easy to process and manufacture, and the cost is low.
3. The so-called output refers to the output or extrusion volume through a given head under the premise of ensuring the quality of plasticization. As mentioned earlier, throughput is generally expressed in kg/hour or kg/revolution. A good screw should have high plasticizing ability.
4. Unit consumption refers to the energy consumed per kilogram of plastic (rubber) extruded, generally expressed by N. where N is power (kW) and Q is output (kg/hour).
The larger this value is, the more energy is required to plasticize the same weight of plastic (rubber), which means the more heating power is consumed, and the more the mechanical work done by the motor enters the material in the form of shear and frictional heat. many.