The short answer: three
The published production system runs three stages in sequence: the panel joints are fastened with steel buckles, the galvanised steel strip is cold-rolled into the edge profile, and the formed edge is pressed flat against the panel under hydraulic force.
Each stage works on a different part of the box. Fastening acts on the joint between two panels. Forming acts on the strip. Pressing acts on the strip already sitting on the panel edge. That is why the three stages do not collapse into one machine: they apply different forces to different places.
What each of the three machines does
The table below maps each stage to the machine that performs it and to the published figure that constrains it.
| Buckle fastening | DA-8000 nailless plywood box buckle machine — 30–60/min, assembly length to 9,000 mm |
|---|---|
| Steel-edge forming | GA-8000 steel-edge forming machine — cold-roll forming with PLC + servo control |
| Hydraulic pressing | Steel-Edge Hydraulic Press — 40–100 tons nominal pressure, platen size 1,300 × 8,500 mm |
When one machine is enough
Not every producer needs all three. If you already form and press the edge elsewhere and only the panel joints are holding you back, the buckle machine is the stage to buy. If your joints are already solved and the box fails at the edge, the forming machine and the press are the pair you need.
Each of the three machines is quoted with its own technical specification sheet for exactly this reason, so you can buy the stage you are missing rather than the whole line.
What decides the count for your box
Three questions decide it. Where does your box currently fail: at the joint, at the edge, or at the panel? What plywood thickness are you running, since the buckle machine is specified from 5 mm to 12 mm? And what assembly length do you need, since the buckle machine reaches 9,000 mm?
Send those three answers and we will confirm which stages your line needs and the configuration of each one.