The process of the conical twin-barrel screw is one of the more commonly used in recent years. The conical twin-barrel screw is a process combination product with excellent corrosion resistance and wear resistance of the screw. The high-speed spraying equipment is used to spray spray the surface of the screw to obtain Conical twin barrel screw with compact structure. The conical twin barrel screw adopts the method of melting and casting, which casts the alloy of high tungsten carbide component and the barrel into one body, using special engineering technology, and precision molding.
In the extrusion process of the cone twin barrel screw, it can be known that the cone twin barrel screw works under high temperature, corrosion, strong wear and large torque. There are three common heating methods, but the more popular and more heating The method is resistance heating:
1. Resistance heating method
It is to let the current pass through the wire with relatively large resistance (resistance wire), thereby generating heat, and then conduction to the material through the barrel wall.
2. Electric induction heating method
The outer circumference of the barrel is equipped with a coil, and a magnetic silicon steel sheet is installed on the periphery of the coil: when the coil has a current passing through, 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 tube generates heat due to a certain resistance value.
3. Heating medium heating method.
This heating method refers to heating the barrel with water vapor or oil as the heating medium. Water vapor needs to be transported by boiler equipment and pipelines, and electric resistance heaters are used to heat oil. Both heating devices are messy, expensive, and difficult to control temperature, so they are rarely used now.