What are the heating methods for the extruder barrel screw?What are the heating methods for the extruder barrel screw?
Extruder barrel screw heating methods mainly include: resistance heating method, electric induction heating method and heating medium heating method. The current heating method is more resistance heating method.
Extruder barrel screw heating method
1. Resistance heating method
is to pass current through a relatively large resistance wire (resistance wire) to generate heat and then conduct it to the material through the barrel wall.
2. Electric induction heating method.
The outer circumference of the barrel is equipped with a coil, and the periphery of the coil is equipped with a magnetic silicon steel sheet: when a current passes through the coil, the silicon steel sheet and the barrel form a closed magnetic circuit, and the alternating magnetic flux induction causes the barrel to generate current. The cylinder generates heat due to a certain resistance value.
Extruder barrel screw
3. Heating medium heating method.
This heating method refers to heating the barrel with water vapor or oil as the heat transfer medium. Water vapor needs to be transported by boiler equipment and pipelines, and the oil is heated by resistance heaters. Both heating devices are messy, costly, and difficult to control temperature, so they are rarely used now.