The working principle involves uncoiling the raw metal strip, guiding it through a series of progressing forming stations with rollers and dies to bend, cut and punch holes, finally cutting finished cable tray pieces to length. Cable tray making machines are used to manufacture cable trays – an important component in electrical installations and industrial buildings for routing cables and wires safely. The process. A cable tray roll forming machine is a specialized cold roll forming system engineered to continuously shape flat steel coils into structured cable tray profiles used across commercial, industrial, and infrastructure electrical installations. Whether you need ladder-type, trough-type, or.