Points to avoid in the manufacturing process of fully enclosed cable trays

In the manufacturing process of fully enclosed cable trays, it is important to avoid certain issues to ensure structural reliability, environmental adaptability, and long-term service life.

Improper or insufficient mixing of resin and curing agent in this case can lead to bubbles, reducing strength and stiffness. Vacuum defoaming technology should be used, and the surface quality should be strictly inspected after curing. Uneven distribution or insufficient content of reinforcing fibers can weaken their load-bearing capacity, and special attention should be paid to the corrosion resistance of fibers in humid environments.

Uneven density of aluminum alloy or stainless steel materials can easily cause bending deformation, and it is necessary to control the processing temperature and regularly replace the cutting tools to reduce errors. Untreated cutting burrs may damage the cable and require laser or waterjet cutting followed by polishing. Failure to design reinforcement bars or cross-sectional dimensions based on cable weight and distribution may result in static deformation. Need to optimize the span through CFD simulation.

Non standard components such as elbows and tees are not made with matching finished products, and manual production can easily cause the cover plate to fail to close or make cable laying difficult. Weather resistant resin or coating is not used in high temperature or corrosive environments, which accelerates aging. The bridge structure in the chemical area needs to pass a 48 hour salt test. Excessive bending or small radius of the bridge frame may result in the inability to install the cover plate, and expansion joints need to be reserved according to the specifications. The connecting plate bolts are mistakenly installed on the inner side or without elastic gaskets, which can easily loosen and crack in vibration environments. The fiberglass bridge frame without pre embedded grounding terminals or jumper wires with a cross-sectional area of less than 4mm may cause electric sparks to carbonize the surface. The lack of electrochemical insulation treatment between the metal bridge and steel support resulted in galvanic corrosion.

The joint of the fully enclosed bridge is not sealed with flame-retardant tape, or the fire compartment is not sealed, resulting in the loss of dust and fire prevention function. The lack of UV protection layer will accelerate the aging of resin matrix and shorten its lifespan by more than 30%. Insufficient thickness of the galvanized layer or uneven spraying can cause corrosion in humid environments, and secondary anti-corrosion processes are needed to strengthen it. The manufacturing of fully enclosed cable trays requires strict control over four major aspects: material ratio, structural design, processing accuracy, and protective treatment. Special attention should be paid to the bubble elimination of fiberglass, anti-corrosion connection of metal parts, and environmental adaptability design.