What equipment is needed to make a blow mold?

Blowing molds first certainly need molds; but also have a blowing machine.

If you are making beverage bottles, you have to make two sets of molds: one set of injection molds and one set of blow molds. An injection molding machine, a bottle blowing machine.

If you are doing blow molded bottles, only one set of blow molds. One extrusion molding machine. Plus air compressor air supply equipment.