Yongte generally equips its PP/PE-based wood-plastic composites with a 500L high-speed thermal mixer, typically featuring dual-speed or variable frequency drive systems. The industry-standard high-speed operating range is between 500-1500 rpm, but actual production processes usually maintain speeds between 600-1000 rpm to ensure the optimal homogenization of wood powder and plastic components while generating controlled frictional heating.
For PVC-based wood-plastic composites, an auxiliary cold mixer is integrated to facilitate post-mixing cooling, operating at significantly lower rotational speeds than thermal mixing stages: typical speed parameters range from 60-90 rpm (with 80-90 rpm being the most common setting). The primary function is gentle agitation to prevent material agglomeration while uniformly reducing the temperature to 40-50°C.
1. considerations of material composition
(1) high wood flour content necessitates moderate speed reduction to mitigate fiber degradation from excessive shear forces
(2) elevated lubricant concentrations permit higher rotational speeds to enhance particulate dispersion
2. Thermal management is regulated via speed modulation
(1) with target temperatures maintained at 100-120°C for PVC formulations
(2) and 120-140°C for PE/PP-based composites
3. Mixing duration correlates inversely with rotational speed
(1) with high-speed cycles typically completed within 5-10 minutes
The operational summary indicates that optimal paddle speed settings are not fixed but dynamically adjusted according to equipment specifications, production throughput requirements, and specific material formulation characteristics.
