An 8K super mirror polishing line for stainless steel coil runs the full No.8 / 8K reflective process on continuous strip, from uncoiler to recoiler. This is the configuration for processors supplying high-gloss coil to appliance, elevator and architectural markets at volume.
How It Works
- Uncoiling — strip fed from a 10–15 t coil.
- Staged wet grinding — progressive grit belts bring the surface flat and even; constant-temperature coolant prevents oxidation tint.
- Pre-polishing — finer belts prepare the surface for reflection.
- Buffing — felt drum and polish paste produce the mirror.
- Closed-loop cleaning — water is filtered, purified and reused; zero sewage discharge.
- Drying and recoiling — complete drying before optional film lamination, then tension-controlled rewinding.
Key Features
- Continuous processing — no panel handling, so output is set by line speed rather than by cycle time.
- Closed-loop water recycling — filtered and purified, zero discharge, low energy.
- Automatic pressure compensation — keeps the strip on a fixed path at speed.
- Constant-temperature wet grinding — protects 316 and other high-hardness grades.
- PLC recipe storage — per-grade, per-finish settings.
Typical Operating Conditions
- Grades — 200 / 300 / 400 series; 201, 304, 316, 430
- Thickness — 0.3–4.0 mm
- Working width — 900 / 1250 / 1500 mm, customised
- Coil weight — 10–15 tonnes
- Line speed — 5–20 m/min by stage
- Machine weight — approximately 13 tonnes
Common Defects and How to Prevent Them
- Longitudinal haze — skipped pre-polishing stage. Progress through grits without leaving a non-uniform scratch pattern.
- Continuous scratch lines — damaged roller or contaminated felt drum; inspect between orders.
- Oxidation tint — insufficient coolant or temperature control.
- Water spots — incomplete drying before recoiling or lamination.
Typical Applications
Appliance and kitchen equipment coil, elevator interior coil, decorative cladding, reflective ceiling systems, and high-end cookware.
Packing & Delivery
Section testing before shipment, foam edge protection, film wrapping and iron rope securing. Engineers remain responsible for their section through dispatch.
FAQ
Is 8K on coil practical for continuous production?
Yes — closed-loop water and constant-temperature grinding are what make it practical. The water system is recirculated rather than consumed, so continuous operation does not create a waste stream.
Sheet or coil line for 8K?
Coil if you supply continuous strip at tonnage. Sheet-to-sheet if panels are cut to order afterwards — the 8K result is identical, the throughput is not.
What does 8K mean in Ra terms?
8K mirror corresponds to surface roughness below roughly 0.05 µm Ra. Specify your target Ra and we will confirm it as an acceptance criterion on the line..
