How to make multi-hole cable trays

Multi-hole cable trays are manufactured by forming metal strips into tray shapes and punching holes using specialized cable tray making machines.

Materials and Preparation

Multi-hole cable trays are typically made from steel, aluminum, stainless steel, or fiberglass, chosen based on strength, corrosion resistance, and environmental conditions ( ). The raw material usually comes in metal coil strips that are uncoiled and prepared for forming. The thickness and alloy type are selected to ensure mechanical strength and durability.

Manufacturing Process

1. Uncoiling and Feeding: The metal strip is fed into a cable tray roll forming machine, which guides it through a series of forming stations ( ).
2. Forming: Progressive dies and rollers bend the metal into the desired tray shape, such as ladder, ventilated, or solid channel types.
3. Punching Holes: Multi-hole patterns are created using punching dies integrated into the machine. The holes allow for airflow, drainage, and cable fastening ( ).
4. Cutting to Length: After forming and punching, the tray is cut to the required length using cutting dies or rotary shears.
5. Optional Welding or Finishing: Some trays may require welding for added strength or surface finishing like galvanization, powder coating, or anodizing for corrosion protection ( ).

Design Considerations

• Hole Size and Spacing: Holes must be sized to accommodate cable ties or fasteners while maintaining structural integrity. Typical spacing depends on cable type and load requirements ( ).
• Tray Type: Ladder trays are ideal for heavy cables and ventilation, perforated trays for medium loads, and solid trays for dust or water protection ( ).
• Load and Support: Ensure the tray design supports the intended cable weight and complies with electrical safety standards.

Machinery and Automation

Modern cable tray making machines are CNC-operated and can produce multiple tray types in one line. They often feature servo-electric pullers, automated die changers, and precision punching systems, allowing for high productivity and consistent hole patterns ( ).

Safety and Standards

Always follow electrical codes and safety standards when designing and manufacturing cable trays. Proper grounding, spacing, and material selection are critical to prevent overheating, electrical interference, and mechanical failure ( ). By following these steps and using the appropriate machinery, you can efficiently produce multi-hole cable trays suitable for industrial, commercial, or data center applications.