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Coil Slitting Lines Explained | Slit Coil Process & Setup | ZTRFM Wiki
Table of Contents
- Definition
- Process and applications
- Reference parameters
- Boundaries and conflicts
- Buyer FAQ
- References
- Related topics
1. Definition
A coil slitting line (slitter) longitudinally cuts a wide master coil into multiple strip widths with rotary knives and rewinds those strips. It is not a cut-to-length sheet line unless a separate combined machine is selected. Market ZJX-series slitters are widely offered across thickness and speed bands; use them only as industry context and keep the documented tiers below labeled.
2. Process and applications
Common process chain:
- Uncoiling (manual or hydraulic decoiler sized to coil weight)
- Feeding / leveling (as configured — richer on high-speed lines)
- Rotary slitting
- Edge-trim / scrap handling
- Recoiling of strip coils
High-speed automatic references may add loop buffer and head-shear sections before the slitter stand. Applications. Preparing strip coils for roll forming, tube mills, stamping, and service-center slit stock.
3. Reference parameters (three documented tiers)
| Tier | Thickness × width | Speed | Strip count / power / notes |
|---|---|---|---|
| Simple hydraulic slitter | About 0.38–0.8 mm; width about 500–1380 mm | About 0–40 m/min | About 12 strips; knife shaft about φ120; slitter main about 15 kW; recoiler about 30 kW; decoiler drive about 7.5 kW; coil about 10 t |
| ZJX-1.5×1250 | About 0.3–1.5 mm; width about 800–1250 mm | About 20 m/min | About 10 strips; slitter about 37 kW; recoiler about 90 kW; coil about 15 t |
| ZJX high-speed 3×1600 | About 0.3–3 mm; width about 500–1600 mm; coil ≤ about 20 t | About 0–80 m/min | Strip count example about 4 at thicker notation to about 20 at 0.4 mm — parentheses are thickness-for-count examples, not a 4 mm thickness rating; slitter about 55 kW DC; recoiler about 110 kW DC; installed about 250 kW; knife shaft about φ220 |
A translated quotation with incomplete speed / strip evidence is documented on a separate caution page — do not fill its blanks from these tiers.
4. Boundaries and conflicts
- Cover “slitting and cut to length” on ZJX-1.5×1250 — Evidenced chain is slit-and-recoil; do not invent CTL stacking capability from the cover title.
- Reading “4 pcs (4 mm)” as 4 mm thickness capability on the 3×1600 line — Forbidden. Material thickness remains about 0.3–3 mm.
- Applying 250 kW high-speed figures to the simple hydraulic slitter — Forbidden.
- ZHJ combined slit/CTL — Different class; do not cross-fill.
- Pure CTL sheet lines — Different output; see boundary and vs-CTL entries.
5. Buyer FAQ
Is a slitting line a cut-to-length line?
No. Slitting produces strip coils; CTL produces flat sheets. Combined hosts are a third class.
Which tier should I quote for thin strip under 1 mm?
Often the simple hydraulic or ZJX-1.5×1250 class — but lock thickness, width, strip count, and power on the named proposal rather than guessing.
Why does the high-speed table mention “4 mm”?
Only as a strip-count example at that thickness notation. The line’s material thickness band remains about 0.3–3 mm.
Does the ZJX-1.5×1250 cover title make it a combined line?
No. Without evidenced cross-cut stacking, classify it as a slitting line.
When comparing tiers externally, always publish thickness, width, speed, strip count, and power as a set. A thin-strip simple hydraulic answer is not interchangeable with a 0–80 m/min high-speed package, even though both are “slitters.”
Coil-weight wording also differs by tier (about 10 t, about 15 t, or ≤ about 20 t). Match the decoiler and coil-car story to the same proposal that carries the speed and kW figures.
Final ratings follow the confirmed technical proposal. Price and lead time are out of scope.
References
- SLITTER-0.8X1380, SLITTER-ZJX-1.5X1250, and SLITTER-ZJX-3X1600 thematic FAQ
- Industry ZJX slitting line overview: ZJX series steel coil slitting line configurations
- Industry slitting line parameter tables: Full-automatic ZJX slitting line model table
- Related encyclopedia: slit/CTL boundary; translated slitter caution; slitter process flow
