Meaning
High-temperature electrical conductors encased in compacted ceramic powder and metallic sheathing protect power and signal lines inside extreme moulding environments. In hot runner systems and high-temperature molds, mineral-insulated cabling provides fire-proof, crush-resistant wiring for thermocouples and heater bands. The magnesium oxide insulation maintains high electrical resistance at temperatures exceeding one thousand degrees Celsius while resisting mechanical damage from tool assembly and clamping forces.
Moulders use these specialized cables to prevent electrical short-circuits caused by melted plastic or crushed wiring inside mold plates. Proper end-sealing is mandatory because exposed magnesium oxide rapidly absorbs moisture from ambient air.
Structural Resilience
Dense metal sheathing protects copper or thermocouple wires from mechanical pinching during mold installation. Compacted magnesium oxide powder provides high dielectric strength and rapid heat dissipation. Seamless outer tubing prevents resin ingress and oil contamination from ruining internal wiring.
Moisture Vulnerability
Exposed cable ends absorb atmospheric humidity when end seals break down. Absorbed moisture reduces insulation resistance, causing electrical short-circuits during system warm-up. Technicians must bake damp cables in drying ovens to restore insulation performance before applying power.
Wiring Installation
Strict bend radius limits prevent sheath cracking and internal wire displacement during cable routing inside mold channels. Specialized potted termination glands maintain moisture seals at junction boxes.
