1. Production Line Overview
Designed for metal roofing accessory manufacturers, this line
provides efficient and safe production of precision ridge valley
flashing profiles with punching function for interlocking roof
panels.
2. Profile Overview
This valley flashing profile is formed from galvanized steel sheets
with a thickness of 0.3–0.8mm. It features pre-folded edges and
punched trapezoidal notches for precise rib roof panel
interlocking. It's widely used in residential, industrial, and
commercial metal roofing systems for water sealing and structural
transitions.
3. Production Process
Flow Chart:
Hydraulic Decoiler - Guide - Roll Former - Hydraulic Punching -
Roll Former - Hydraulic Cutter - Out Table
Process:
The forming section features chain-driven stations with protective
guards and pre-folding rollers for edge bending. Punching is
integrated mid-line after folding to produce accurate trapezoidal
notches, ensuring smooth panel interlocking. The hydraulic cutter
provides precise profile cutting for final flashing segments.
4. Technical Parameters
| Machine | Analysis |
| Hydraulic Decoiler | Holds 5T steel coil, enables stable unwinding |
| Hydraulic expansion increases efficiency |
| Guiding Device | Ensures steel strip enters straight, avoids misalignment |
| Roll Former | Chain-driven, wall-plate structure for durability |
| Pre-folds edges for safety and better finish |
| Chain guard protects workers and machine |
| Mid-section punching prevents deformation |
| Hydraulic Punching | Forms trapezoidal notches for rib panel compatibility |
| Located after folding to protect forming accuracy |
| Hydraulic Cutter | Clean, precise cutting of final profile |
| Out Table | Supports finished product, optional for automation upgrade |
5. Key Focus
Pre-folding rollers reduce edge sharpness for safer handling
Integrated trapezoidal punching enables rib panel compatibility
Chain drive system with safety cover enhances machine durability
Mid-line punching preserves fold integrity and precision
Designed for high-efficiency flashing production in roofing
industries
6. Production Line Components
| Machine | Quantity |
| Hydraulic Decoiler | 1 set |
| Guiding Device | 1 set |
| Roll Former | 1 set |
| Hydraulic Punching | 1 set |
| Hydraulic Cutter | 1 set |
| Out Table | 2 sets |
| Hydraulic Station | 1 set |
| PLC Cabinet | 1 set |
7. Customization Options
This roll forming line can be customized to produce valley flashing
profiles with different notch shapes and positions to match various
rib roof panels. Optional upgrades include auto punching mold
exchange, digital notch positioning system, extended forming
stations for complex edge folding, and servo-controlled punching
for higher precision.
