What are the heat dissipation design requirements for a Single Screw Barrel during high-temperature, high-pressure extrusion?

Heat dissipation design requirements for a Single Screw Barrel during high-temperature, high-pressure extrusion:

1. Selection of High-Efficiency Heat-Conducting Materials

High-thermal-conductivity alloy steel or stainless steel must be used to quickly transfer the heat generated by the screw to the cooling system.

The coefficient of thermal expansion of the material should match that of the screw to prevent stress concentration due to temperature changes.

2. Control of Wall Thickness and Surface Finish

A reasonable wall thickness can improve heat transfer efficiency while ensuring structural strength.

The inner wall finish needs to reach the micron level to reduce frictional heat between the material and the wall surface and reduce the risk of localized overheating.

3. Layout and Fluid Dynamics of the Cooling System

Cooling channels should be evenly distributed around the barrel to form a closed-loop circulation, ensuring rapid heat removal.

A multi-stage cooling design should be adopted, allowing independent temperature adjustment for different processing stages to meet different plasticizing requirements of the material.

4. Temperature Monitoring and Automatic Control

High-precision temperature sensors are deployed at key locations to achieve real-time temperature acquisition. Closed-loop control via PLC or DCS system automatically adjusts cooling water flow and temperature based on temperature feedback to ensure thermal balance during extrusion.