Method of producing high-pressure tank, and high-pressure tank

A method of producing a high-pressure tank, the high-pressure tank including a liner that contains gas, and a reinforcement layer that is made of fiber-reinforced resin and covers an outer surface of the liner, the reinforcement layer having a cylindrical member, and two domed members provided at opposite ends of the cylindrical member and formed integrally with the cylindrical member, one of the domed members including a domed main body, and a cylindrical protruding portion that protrudes from the domed main body and has a gas channel used for filling and discharge of the gas, the method comprising:

• a process of forming at least the one of the domed members,
• wherein the process of forming at least the one of the domed members includes
• placing first fiber bundles impregnated with a first resin, such that the first fiber bundles form a part of the protruding portion and a part of the domed main body, and
• placing second fiber bundles impregnated with a second resin, such that the second fiber bundles cover the first fiber bundles,
• wherein the first fiber bundles are placed, such that a fiber direction of the first fiber bundles in the protruding portion follows an axial direction of the protruding portion, and the first fiber bundles extend continuously from the protruding portion to the domed main body, and the first resin with which the first fiber bundles are impregnated is solidified while the first fiber bundles are being placed, and
• wherein the second fiber bundles are placed, such that a fiber direction of the second fiber bundles intersects with the fiber direction of the first fiber bundles.