See China Electrical Box Manufacturer How To Making Draw Box Cover
Flush Mount Enclosure Cover Roll Forming Machine Product specifications:As per Enclosure Size to match both head panel forming process. Draw Box Cover Production Line Item Technology parameter Material Material cold-roll strip,galvanized steel strip Thickness 0.5-0.7mm Coil Inner Ф360—Ф510 Process Form Speed 0-8m/min Length Not limit Quality Length Precision L≤1000mm ： ±0.5 ㎜ Straight, Deflection L≤1000mm ， Bend no more than 1mm ； Deflection no more than 2mm Forming size As per design Concealed box made by Superda roll forming machine