What Are the Nine Key Steps in Manufacturing Twin Screw Extruder Screw Elements?
Twin screw extruder screw elements are the core working parts of the extruder. The precision and rigor of their manufacturing process directly affect equipment performance and service life. Based on years of industry experience, ZHITIAN summarizes the nine key steps in screw element production to ensure every product meets high standards of accuracy and durability.
1. Raw Material Inspection and Cutting
All raw materials undergo strict inspection to ensure chemical composition and performance meet standards. Qualified materials are then cut and drilled to produce bars with required length and specifications.
2. Spheroidizing Annealing
Spheroidizing annealing reduces material hardness and improves machinability, minimizing cracking and deformation risks during subsequent processing.
3. Rough Turning
The bars are rough turned to remove most excess material, shaping them close to the final outer contour for easier finishing.
4. Internal Spline Machining
Precision machining of internal splines in the central bore is critical for efficient torque transmission between the screw element and shaft.
5. End Face Truing
The end faces are machined to ensure flatness, parallelism, and perpendicularity of the central axis, meeting assembly and operational requirements.
6. Surface Grinding
Precise grinding controls dimensions and tolerances between end faces, achieving excellent surface finish and ensuring sealing and fit accuracy.
7. 3D Profile Machining
Turning for conveying elements and milling for kneading elements create the final three-dimensional geometry to optimize material conveying and mixing.
8. Heat Treatment
Strict heat treatment enhances hardness and strength, improving wear resistance and extending service life.
9. Final Profile and Surface Grinding
Final precision grinding corrects heat treatment distortions, ensuring dimensional stability and high accuracy of the finished product.
Conclusion
Through rigorous control of these nine key steps, ZHITIAN's twin screw extruder screw elements achieve excellent performance, outstanding stability, and durability, meeting the demanding requirements of plastics, chemical, and new energy industries.
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