EN 
简体中文In screw-based extruders, the rotating screw grinds the electrode as it passes through the barrel. Both the mechanical energy of the rotating screw and the heat introduced along the extruder barrel plasticize the incoming material. The barrel can be heated with hot air or coil heaters.
The electrode is pulled into the moving screw, and in the process, it passes through a feed sleeve that prevents twisting of the rod. Once inside the screw, the knife cuts the electrode into small pieces, the screw moves the rod forward, heat is generated through compression and friction, and the air heater provides hot air to preheat the substrate before welding. In air heating models, hot air for preheating can flow around the extruder barrel in the preheating chamber. Combined with the frictional heat of the screw, this causes the electrode to be plasticized and mixed into a homogeneous mass before the extrudate leaves the nozzle.
A screw extruder with coil heating works on the principle that the electrode is pulled into a moving screw, and in the process it passes through a feed sleeve that prevents the rod from twisting. Once inside the screw, the knife cuts the electrode into small pieces, the screw moves the rod forward, heat is generated through compression and friction, and the air heater provides hot air to preheat the substrate before welding.
In coil heating models, the coil heater provides the additional heat required for plasticization. The heater is wound around the entire extruder barrel, and a thermocouple built into the barrel measures the temperature of the plastic and transmits the information to the control system, ensuring precise temperature control. The extrudate then exits the nozzle uniformly at a precisely controlled temperature, with the preheated air temperature measured by a separate thermocouple and regulated by the same control system.
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