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Metal Embossing Machines: Types, Applications and Selection
1. What the machine actually does
A metal embossing machine (also called a sheet / coil embossing line) presses a repeating texture into steel or aluminium between a matched pair of rolls — one male, one female. The pattern lives in the roll mesh. It is copied from a customer sample or a pattern drawing, not drawn by a CNC cutter and not formed as roof ribs.
Typical names on drawings: willow leaf, wood grain, diamond, tear-drop, checker. The mill does not have “one house pattern.” If the sample changes, the roll set changes.
On a full coil line the strip is paid off, flattened, embossed, flattened again, then either sheared to sheet or recoiled. The emboss head is only the roll pair and its drive. Decoiler, levelers and shear are package items — they appear on some proposals and not on others.
2. Types you will be quoted
The search term is one. The iron on the floor is not.
| What is being sold | Feed | Exit | When it is the right ask |
|---|---|---|---|
| Coil line with shear | Decoiler, often with a coil car on heavier packs | Cut sheets + exit table | You sell plate or decorative sheet by the piece |
| Coil line with recoiler | Decoiler | Patterned coil | A service centre; later slitting or forming |
| Stand-alone dual-roll head | An existing levelling / CTL line | Whatever that line already does | You already own payoff and cutoff |
| Emboss station on a deck / panel mill | The roof or floor-deck host | A profiled panel with a light texture | Concrete-bond ribs on deck, or a light texture on a panel — this is an option on that mill, not an embossing line |
Anti-slip plate at about 4 mm and decorative colour-coat at about 1 mm are different hosts. Drive, roll diameter and leveller duty follow the coil, not a catalogue adjective like “automatic.”
3. Where the sheet is used
- Walkway / truck / anti-slip plate — deeper mesh, thicker strip
- Interior door and wall skins — wood grain and similar, usually colour-coat
- Appliance wrap — coating has to survive the roll mesh; depth is a gap setting, not a slogan
If the paint cracks, the pattern is too deep for that coating, or the entry strip was not flat. Entry levelling is there so depth stays even across the width. Exit levelling is there because the pattern itself puts bow into the strip. A recoil-only line still wants that exit cluster if the next process needs a flat coil.
4. Thickness classes already in this catalogue
These are labeled references from the existing embossing FAQ / wiki, not a blended “series standard.” Quote the named coil, then copy the matching row.
| Class (as documented) | Thickness / width notes | Speed note | Drive note |
|---|---|---|---|
| Thick-line full package | About 4 mm; width notes about 1250 mm (also 4 × 1500 — contract width decides). Rolls about Ø500 × 1650 mm, 9Cr2Mo, hard chrome face. | About 0–6 m/min | Emboss about 22 kW; entry and exit levelers about 7.5 kW each; shear hydraulic about 5.5 kW |
| 1220 × 1.5 thin | Max about 1.5 mm × 1220 mm | About 0–10 m/min | Emboss motor about 7.5 kW |
| CZ1600 thin | About 0.8–1.2 mm × ~1250 mm; face ~1400 mm | About 1–6 m/min | Drive about 11 kW; exit leveler about 4 kW |
A separate process-library build is tagged 1250 × 4.0 coil embossing: male/female rolls, depth across the width, repeat pitch against the customer pattern board, coating survival. That class sits with the thick-line neighbourhood. Roof formers, barrel corrugation, embossed ridge and film laminators are other machines on that same order family — they do not share this roll pair.
Willow-leaf quotes in 1–3 mm or 3–6 mm bands, if they appear, are further rows. They are not averaged with the three rows above.
5. How to specify one
- Pattern sample or CAD of the mesh (pitch and depth).
- Maximum thickness and coil width you actually buy — this picks the host class.
- Cut sheets or recoiled coil.
- Coil mass, ID/OD — this sizes the decoiler, not the emboss motor.
- Need for entry/exit levellers (normal on coil; confirm on a head-only quote).
- Voltage / frequency. Brand of inverter follows the proposal, not this page.
If you only have a photo of checker plate and no thickness, the vendor cannot choose between the 22 kW thick-line motor and the 7.5 kW thin motor. Send the coil ticket.
6. Nearby machines that are not this
- Roof-tile / trapezoid / deck mill — forms the panel profile. A light emboss on deck for concrete bond is an option on that mill.
- Barrel corrugated — long-radius corrugation on large rolls, counted in pieces, not a patterned dual-roll texture.
- CNC engraving / milling — cavities in a tool, not continuous coil.
- Perforation / punch line — holes, not a raised mesh.
7. Buyer FAQ
Is a metal embossing machine the same as a roof panel machine?
No. The core tooling here is the patterned roll pair. A roof mill’s core is the rib flower.
Is 22 kW the standard motor?
No. About 22 kW is the documented thick-line emboss motor. The 1220 × 1.5 class is about 7.5 kW; CZ1600 drive is about 11 kW.
Does every line include a hydraulic shear?
Full thick-line packages in the FAQ include shear and an exit table. Recoil-only layouts and stand-alone heads often omit shear. Read the BOM.
Can one machine run 4 mm checker and 0.8 mm wood grain?
Not as one rating. Roll diameter, motor and leveller follow the thickness class. Name the coil.
Who supplies the pattern?
You do — a physical sample or a drawing. The shop cuts or sources the matched rolls to that mesh.
Motor, speed and width follow the named class on the quotation. Commercial terms come back on the offer.
References
- ZTRFM wiki: Metal Sheet Embossing Line (definition + thick/thin/CZ1600 tables)
- ZTRFM wiki: Embossing configuration tiers compared
- ZTRFM wiki: Typical metal embossing line process flow
- Process library: Metal Coil Embossing — 1250 × 4.0 class (pattern depth, registration, coating). Roof / barrel / ridge / film are separate processes.