Ridge Cap Roll Forming Machine

1. **Decoiling** --- Pre-painted steel coil (0.3--0.7 mm) is loaded onto the hydraulic decoiler and fed into the entry guide
2. **Leveling** --- A pinch-and-level roll unit removes coil set and delivers flat strip to the forming section
3. **Forming (bend and fold)** --- Multiple roll stations progressively bend the strip into the ridge cap cross-section, folding each leg to the target angle
4. **Angle adjustment** --- On adjustable models, the operator sets the bending rollers to the required ridge angle (e.g. 90°, 120°, or any intermediate value) before the production run
5. **Cut to length** --- A follow-up hydraulic or flying shear cuts the formed profile to the ordered length (commonly 1--6 m) without stopping the line
6. **Collection and bundling** --- Finished ridge caps are stacked on the run-out table, bundled, and strapped for shipment or direct installation

Ridge cap quality checks focus on dimensional accuracy and surface integrity, since the product must seal the roof ridge and match the roofing panel finish:

• **Bend-angle accuracy** --- Measured with a digital protractor at multiple points; ±0.5° tolerance is standard for watertight ridge sealing
• **Profile width consistency** --- Overall cap width must stay within ±0.8 mm across the full coil run to maintain overlap coverage
• **Fold-line straightness** --- Deviation along the bend line should not exceed 1 mm/m; bow or twist prevents tight ridge joint assembly
• **Surface coating integrity** --- Inspect for micro-cracks at the bend radius, roller marks, and color scoring --- especially on PPGI material with textured or matte finishes
• **Cutting end squareness** --- Shear cut ends must be within 0.5 mm square over the profile width; angled cuts cause uneven overlaps at ridge joints
• **Color consistency** --- Verify that the ridge cap coil lot matches the roofing panel batch number to avoid visible color shade differences on the finished roof
• **Overlap fit between pieces** --- Test-fit adjacent pieces over a 50 mm overlap zone; gaps or rocking indicate angle or width deviation
• **Material thickness verification** --- Confirm formed profile wall thickness has not thinned beyond 5% at the bend apex due to excessive forming pressure

Ridge cap roll forming machines are relatively compact, with total line lengths of 4--7 m depending on the number of forming stations and whether an adjustable-angle mechanism is fitted. A standard configuration fits in a 20GP container; wider or adjustable models with dual decoilers may require a 40GP. The forming rollers --- machined from Cr12 or 45# steel and frequently chrome-plated for PPGI compatibility --- are removed from the shafts and individually wrapped in anti-rust paper with foam padding to prevent contact damage. The angle-adjustment mechanism (lead screw, worm gear, and indicator scale on adjustable models) is locked in position and braced with timber blocks to absorb transit shock. The electrical cabinet is sealed with a moisture-barrier bag and silica gel packs, protecting the PLC, inverter, and touch screen from humidity damage during ocean freight.

Unionindus provides comprehensive after-sales support for ridge cap roll forming machines, covering commissioning, operator training, and ongoing technical assistance:

• **Angle-adjustment mechanism calibration** --- On-site setup of the adjustable-angle lead screw and dial indicator; verification against a digital protractor at 90°, 120°, and intermediate positions
• **Roller gap setup for different gauges** --- Step-by-step guidance on adjusting upper and lower roller clearances when switching between 0.3 mm and 0.7 mm material
• **Bend-line sharpness troubleshooting** --- Diagnosing and resolving radius widening, waviness, or uneven fold lines caused by worn rollers or incorrect gap settings
• **Color-coating scratch prevention** --- Felt roller condition assessment and replacement schedule; alignment checks to eliminate contact between steel roller surfaces and pre-painted material
• **Speed adjustment for material type** --- Inverter parameter tuning when switching between PPGI (slower forming speed to protect coating) and bare galvanized coils (higher speed permitted)
• **Tooling change for different ridge cap widths** --- Guided procedure for shaft removal, roller set swap, and re-alignment when changing from one profile width to another (typical changeover: 1.5--2 hours)
• **PLC and electrical system support** --- Remote diagnostics via TeamViewer or similar; program backup and restoration; spare-part dispatch within 48 hours for critical components
• **Annual preventive maintenance** --- Scheduled inspection of bearing lubrication, chain/belt tension, hydraulic shear blade condition, and decoiler brake performance