Bicycle hub forming mold with ejector pin convenient to replace and replacing method thereof

The invention relates to the field of bicycle hub production, in particular to a bicycle hub forming die convenient for ejector pin replacement and a replacement method thereof.The bicycle hub forming die comprises an upper die and a lower die, a cavity is formed between the upper die and the lower die, and an ejection mechanism penetrating to the cavity is movably arranged on one side of the lower die; a limiting mechanism used for limiting the ejection mechanism is arranged on one side of the lower die. The method further comprises the following replacement steps that firstly, the fixing assembly is separated from the side blocking assembly and the ejection mechanism; then, after the fixing assembly is rotated, the whole ejection mechanism is taken out from the side wall of the lower die; and then a new ejection mechanism is installed on the side wall of the lower die again, finally, the fixing assembly is rotated and then connected with the side blocking assembly, and replacement is completed. The ejector