1. Equipment Structure Factors
Mixing element design: The shape, arrangement density, and spiral angle of paddles/screws directly affect material contact and shear intensity.
Barrel structure: The length-diameter ratio of the mixing barrel and the presence of baffles determine the material residence time and flow state.
Feeding/discharging structure: Uniform feeding distribution and stable discharging speed avoid local material accumulation or short-circuit flow.
2. Operating Parameter Factors
Rotational speed of mixing elements: Higher speeds enhance shear and diffusion effects but may cause material stratification at excessive speeds.
Throughput (processing capacity): Excessive throughput reduces material residence time, while insufficient throughput leads to inefficient mixing.
Filling rate: The ratio of material volume to barrel volume affects contact frequency between materials; an optimal range (usually 60%-80%) is required.
3. Material Property Factors
Particle size and distribution: Materials with similar particle sizes mix more uniformly; large differences may cause segregation.
Density difference: Significant density gaps between materials easily lead to stratification (heavy materials sink, light materials float).
Moisture content and viscosity: Appropriate moisture improves adhesion between particles, but excessive moisture causes agglomeration; high viscosity materials hinder diffusion.