Method for repairing mixer spindle

The invention discloses a method for repairing a mixer spindle, and belongs to the technical field of pellet mixers. The method for repairing the mixer spindle comprises following steps: a to-be-repaired part of the spindle is polished smoothly and cleaned with a cleaning agent, a repairing agent is prepared, a reinforcing agent is added to the repairing agent, the to-be-repaired part of the spindle is subjected to laying filling by the repairing agent with the reinforcing agent added, a repairing layer is formed and enabled to be cured, when curing strength of the repairing layer reaches 80%,the repairing layer is sleeved with a cylinder, the cylinder and the unrepaired part of the spindle form one spindle in an unworn state, a gap is formed between the cylinder and the repairing layer,length of the cylinder keeps consistent with that of the to-be-repaired part of the spindle, the reinforcing agent is injected into the gap, thermal insulation is performed for 24 h at the thermal insulation temperature of 15-