Bottom pouring type casting cable joint method and device

The invention relates to a bottom pouring type cable connector casting method which comprises the following specific steps: (1) the bottom end of a steel wire rope is scattered into a broom shape to be cleaned, the cleaned steel wire rope is inserted into a cable connector from the upper portion of the cable connector, and the upper portion of the steel wire rope is fixed to a supporting frame through a fixing clamp; (2) a plug is plugged into the bottom of the cable connector, and the cable connector is preheated in a preheating furnace; (3) weighing a metal block, putting the metal block into a crucible, and melting the metal block into metal liquid through a high-temperature melting furnace; (4) the control valve is opened, and the metal liquid enters the cable connector through the connecting pipe; (5) when the metal liquid submerges the upper portion of the cable connector, the control valve is closed, and the cable connector is subjected to heat preservation; (6) after heat preservation is finished, fur