Ridge Cap Roll Forming Machines

Machines produce standard angular V-shaped ridge caps with side hemmed edges, semicircular round barrel caps, and stepped ridge caps featuring hydraulic transverse indentations designed to match stepped glazed tile roofs. Each machine is tailored to specific profile drawings.

Standard lines process prepainted galvanized steel (PPGI), prepainted galvalume (PPGL), aluminum, and galvanized strip in thicknesses from 0.3 mm to 0.8 mm. Infeed coil strip widths typically range between 300 mm and 600 mm depending on ridge girth.

A dedicated hydraulic step-pressing mold is positioned downstream of the roll forming stands. As the formed ridge profile advances, the line pauses momentarily at programmed intervals (typically 200 mm to 400 mm) to stamp an architectural step indentation before final cutting.

Hemmed return edges provide structural rigidity along the long thin flashing edges, prevent sheet buckling during installation, eliminate razor-sharp metal edges for installer safety, and provide a snug mechanical seal over roof fasteners.

Rollers are precision CNC-turned from high-grade 45# steel or GCr15, heat treated for surface hardness, mirror polished, and electroplated with 0.05 mm hard chrome, ensuring smooth contact that prevents paint scuffing or coating micro-cracking.

Lines equipped with optical rotary encoders and PLC controls achieve cut-to-length accuracy within ±1.0 mm. Production speeds range from 8 to 12 m/min for stepped ridge caps and 12 to 18 m/min for continuous straight V-caps.

Buyers should supply cross-sectional drawings with dimensions (flange angle, girth, hem size, step depth), coil material type (PPGI/GI/Aluminium), thickness range, uncoiler capacity, and workshop electrical voltage standards.