Temperature control is a critical parameter in wood-plastic composite (WPC) extrusion processes, as deviations directly impact melt quality and final product performance. Yongte recommends operators tailor extruder temperatures to the specific material composition. Below are expert-recommended initial temperature ranges for startup, with adjustments to be made based on real-time production output.
Feeding Zone (140-160℃): Preheats raw materials to prevent material block bridging and ensure consistent material flow
Plasticizing Zone (170-190℃): Facilitates complete fusion of wood flour and polymer matrix, ensure the material is good plastizited.
Homogenizing Zone (180-190℃): Stabilizes melt viscosity for uniform material properties, ensure composition good of wood and plastic material
Die Head (185-200℃): Maintains slightly higher temperature than homogenizing zone to prevent premature cooling and ensure smooth extrusion
Low Temperature Risks : Insufficient plasticization causes unmelted particles to cool and shrink in the die, forming surface pits
High Temperature Risks : Excessive heat leads to wood flour carbonization or polymer degradation, resulting in black/brown surface defects. Remedial actions: Inspect temperature control system (thermocouples), reduce overheated zone temperatures, and install cooling fans if necessary
