850mm rewinding line
This is an 850mm metal coil rewinding line, primarily designed for rewinding, inspecting, edge trimming, or modifying specifications of pre-slit or mother coils. Rewinding lines are essential equipment in the post-processing of metal strips, widely used in industries such as cold rolling, stainless steel, silicon steel, and non-ferrous metals. They effectively improve finished coil quality, eliminate defects, and meet diverse packaging and delivery requirements.
I. Main Technical Parameters Table
| Parameter | Specification |
|---|---|
| Max. Coil Width | 850 mm |
| Unwinder (S-Roll) Motor Model | Z4-200-31 |
| Unwinder Motor Power | 49.5 KW |
| Unwinder Motor Speed | 900 / 2000 rpm |
| Rewinder Motor Model | Z4-250-41 |
| Rewinder Motor Power | 81 KW |
| Rewinder Motor Speed | 540 / 1600 rpm |
II. Core Unit Configuration Details
1. Unwinding Unit (S-Roll)
Motor Model: Z4-200-31
Motor Power: 49.5 KW
Speed Range: 900 / 2000 rpm
Features:
Utilizes Z4 series DC motor with excellent speed control and stable operation
Adapts to unwinding requirements of various mother coils with precise tension control
Provides stable pay-off power to ensure smooth strip feeding into subsequent processes
2. Rewinding Unit
Motor Model: Z4-250-41
Motor Power: 81 KW
Speed Range: 540 / 1600 rpm
Features:
Higher power configuration compared to the unwinding unit for strong recoiling capacity
Capable of high-speed, high-tension rewinding to ensure compact coils with neat edges
Suitable for finishing processes with strict requirements for coil shape quality
III. Overall Line Performance Advantages
Independent Drive Configuration:
Unwinding and rewinding units are independently driven with flexible control systems
Allows separate adjustment of speed and tension according to process requirements, adapting to various materials and specifications
Wide Speed Range:
Unwinder motor max speed 2000 rpm, rewinder motor max speed 1600 rpm
Covers all operational scenarios from low-speed threading to high-speed continuous production
Broad Material Applicability:
Suitable for cold-rolled sheets, stainless steel, silicon steel, galvanized sheets, color-coated sheets, non-ferrous metals, etc.
Maximum width of 850mm, covering finishing needs for narrow to medium-width strips
Strong Finishing Capability:
Used for inspection, edge trimming, specification modification, and coil shape improvement
Effectively eliminates defects such as loose coils, telescoping, and uneven edges in mother coils
IV. Applicable Industries and Applications
| Industry | Typical Application |
|---|---|
| Cold Rolling | Finishing, specification modification, rewinding of cold-rolled coils |
| Stainless Steel Processing | Inspection, edge trimming, rewinding of stainless steel strips |
| Silicon Steel Processing | Rewinding and specification adjustment of silicon steel coils |
| Galvanizing / Color Coating | Finishing of galvanized and color-coated sheets |
| Non-Ferrous Metal Processing | Rewinding and inspection of copper, aluminum, and other non-ferrous strips |
V. Conclusion
This 850mm rewinding line is an efficient system specifically designed for metal strip finishing processes. It features independent drives, wide speed range, sufficient power configuration, and broad material adaptability. Both the unwinding and rewinding units are equipped with high-power Z4 series DC motors, enabling precise tension control and stable operation across various working conditions, from low-speed threading to high-speed continuous production.
This equipment is ideal for inspection, edge trimming, specification modification, and coil shape improvement in industries such as cold rolling, stainless steel, silicon steel, and non-ferrous metals. It represents an optimal solution for improving finished coil quality, optimizing inventory management, and meeting customized customer packaging requirements.
