Product Overview
In every co-rotating twin screw extruder, screw elements are the critical motion components that define how efficiently
materials are conveyed, mixed, and plasticized. Their geometry,
surface quality, and alloy composition directly affect production
stability, product uniformity, and mechanical wear.
ZHITIAN’s screw elements are manufactured through multi-axis CNC machining and advanced heat treatment, achieving micron-level accuracy and perfect axial alignment.
Designed for long-term, high-torque operation, these elements maintain dimensional stability even under extreme
mechanical stress and high temperature conditions.
To meet the diverse requirements of polymer compounding and
engineering material modification, ZHITIAN offers a comprehensive
selection of wear-resistant and corrosion-resistant materials such
as W6Mo5Cr4V2, 38CrMoAl, Cr12MoV, SKD61, and PM-HIP alloys (SAM26, SAM39, CPM10V, CPM9V).
Each production step — from material inspection to finishing —
follows a standardized process, ensuring consistency across every
segment and guaranteeing full interchangeability between screw
elements.
Technical Attributes
| Attribute | Specification |
|---|
| Base Materials | W6Mo5Cr4V2, 38CrMoAl, Cr12MoV, SKD61, PM-HIP (SAM26, SAM39, CPM10V,
CPM9V) |
| Hardness Level | 58–69 HRC (varies by alloy type) |
| Surface Treatment Options | Nitriding, Polishing, or Plasma Coating |
| Tolerance Accuracy | ±0.01 mm on key engagement surfaces |
| Processing Method | CNC machining + precision grinding |
| Applicable Extruder Range | 20–180 mm screw diameter systems |
| Functional Types | Conveying, Mixing, Kneading, Shearing, Dispersing |
| Industry Applications | Plastics, Rubber, Chemicals, Biopolymers, Additive Masterbatch |
Key Benefits
Exceptional wear life thanks to powder metallurgy alloys
Corrosion resistance for chemical and filled polymer applications
Smooth torque transmission through precision interlocking design
Optimized surface finish for minimal material adhesion
Full customization for geometry, flight pitch, and material grade
Applications
ZHITIAN screw elements are widely applied in:
Engineering polymer compounding and blending
Masterbatch and additive manufacturing
Elastomer and rubber compounding lines
High-filler and fiber-reinforced extrusion
Corrosive or high-temperature chemical extrusion processes
Manufacturing Excellence
At ZHITIAN, we integrate metallurgical expertise with digital manufacturing.
Each screw element is traceable through its production batch, from
raw material to final inspection. Using 3D coordinate measuring systems (CMM) and digital hardness verification, we ensure every element meets stringent quality and
interchangeability standards.
FAQ
Q1: How do ZHITIAN screw elements ensure consistent extrusion
performance?
A1: Through standardized geometry and precise machining tolerances,
each segment maintains stable shear and mixing zones, preventing
process fluctuations.
Q2: What is the difference between tool steel and PM-HIP materials?
A2: Tool steels like W6Mo5Cr4V2 and SKD61 offer excellent hardness
and toughness, while PM-HIP materials (e.g., CPM10V) provide
superior wear and corrosion resistance under extreme loads.
Q3: Can ZHITIAN customize screw elements for special polymers?
A3: Yes. We design and produce customized screw elements based on
polymer viscosity, filler ratio, and throughput requirements.
Q4: How do you guarantee compatibility with my extruder brand?
A4: All screw elements are fully interchangeable with global
extruder models from leading OEMs. CAD verification ensures
dimensional alignment before production.
