Inductively heated mold system

A method of forming a balloon from a parison comprising:

• a) providing an inductively heated mold system comprising:
• first heater module comprising:
• a mold aperture;
• an inductive coil;
• a mold body assembly configured within the mold aperture and within the inductive coil and comprising:
• a mold body that is thermally conductive;
• and
• a mold cavity;
• a ferromagnetic layer configured around the mold body;
• a cooling channel between the ferromagnetic layer of the heater module and the inductive coil, wherein the cooling channel has an offset distance for a flow of a cooling fluid;
• wherein the ferromagnetic layer is configured to be heated by the inductive coil and wherein the ferromagnetic layer is configured to heat the mold body through thermal conduction;
• b) inserting a parison into the mold cavity;
• c) flowing electrical current through the inductive coil;
• wherein the ferromagnetic layer is heated inductively and heats the mold body;
• d) heating the parison;
• e) pumping an inflation fluid into the parison to expand the parison;
• f) stretching the parison;
• g) pumping a cooling fluid through the cooling channel to cool the mold;
• h) removing the parison from the mold cavity.