Extruder Feeding Method Classification

① Gravity feeding:
Principle--The material enters the barrel by its own weight, including manual feeding, spring feeding, and air blast feeding.
Features--Simple structure and low cost. But it is easy to cause uneven feeding, thus affecting the quality of the product. It is only suitable for small-sized extruders.
② Forced feeding:
Principle--Install a device in the hopper that can exert external pressure on the material to force the material into the extruder barrel.
Features--It can overcome the "bridging" phenomenon and make the feeding uniform. The feeding screw is driven by the extruder screw through the transmission chain, so that its speed is adapted to the screw speed. The overload protection device can be activated when the feeding port is blocked, thereby avoiding damage to the feeding device.