Profile: Cherng Ji Industrial Co.,Ltd. is a manufacturer and exporter of all kinds of roll forming machines. We are engaged in designing simple to high-complicated roll forming machines. Our product includes roll forming machine, roll former, roofing machine, metal roofing machine, floor deck roll forming machine, roof panel forming machine and roof title forming machine. Our roll forming machine can roll form metal roofing sheet. After the roll foration, the surface will look very smooth and beautiful without any scratch on it. Our hydraulic arch crimping machine is used to crimp the formed corrugated sheets into horizontal stripes through hydraulic crimping mold. The distance between each press decides the curvature of the arch. It is suitable for edge of buildings, parking garage, pavilion and for various round roofs of buildings.