عربى
Parallel Screw Barrel is a key component in the field of polymer materials and fine chemicals. It is designed for efficient mixing, dispersing, shearing and homogenization processes and is widely used in engineering plastic modification, masterbatch preparation, cable sheathing, biodegradable materials and precision extrusion in the pharmaceutical and food industries. Its parallel twin-screw structure achieves precise material conveying and mixing through co- or counter-rotation. With flexible aspect ratio (L/D 18-40) and compression ratio design, it can adapt to a variety of formulation requirements to ensure high output, low energy consumption and stable processing.
Core performance and highlights
High-strength wear-resistant design: Made of high-quality alloy steel 38CrMoAlA (SACM645), nitrided (surface hardness HV900-1100, nitrided layer 0.5-0.8mm) or bimetallic spraying process (alloy layer hardness HRC58-65, thickness 1.5-2mm), it significantly improves wear resistance and corrosion resistance, and is suitable for harsh working conditions such as glass fiber reinforcement and high-filled calcium carbonate.
Precision manufacturing process: Screw straightness ≤ 0.015mm, surface roughness ≤ Ra0.4, combined with chrome plating process (thickness 0.025-0.1mm, hardness ≥ HV900), ensure uniform and stable material flow, reduce retention and degradation, and improve the consistency of finished products.
Multifunctional adaptability: Supports multiple specifications from Φ45-Φ200mm, and can customize screw structure, segmented temperature control and exhaust design according to raw material characteristics (such as viscosity, thermal sensitivity) to meet the diversified processing needs from general plastics (PE/PP) to special engineering plastics (PA, PC, PEEK).
Process and material advantages
Heat treatment strengthening: The base material is tempered (tempering hardness HB280-300), combined with nitriding or bimetallic surface technology to achieve a balance between high hardness and high toughness and extend service life.
Efficient mixing ability: The co-rotating design of the parallel twin screws enhances the dispersion and shearing effect, which is suitable for scenes with extremely high requirements for mixing uniformity, such as masterbatch, flame retardant materials, and reactive extrusion.
Application areas
Engineering plastic modification: such as ABS toughening, nylon reinforcement, and flame retardant masterbatch preparation.
Environmental material processing: efficient extrusion of biodegradable plastics (PLA/PBAT) and wood-plastic composite materials.
High-end precision products: production of ultra-thin products such as medical catheters, optical films, and lithium battery separators.
