High-pressure tank, method of manufacturing high-pressure tank, and manufacturing equipment of high-pressure tank

A method of manufacturing a high-pressure tank, the method comprising:

• injecting resin into a forming mold that includes a male mold and a first female mold, and forming a first layer of a liner;
• removing the first female mold to replace it with a second female mold and injecting resin with a gas barrier property to form a gas barrier layer on the outer surface of the first layer so as to make a two-layer structure;
• welding the liners to each other after the two-layered liner is release from the mold;
• and
• heating and curing the welded liners after filament winding molding.

A method of manufacturing a high-pressure tank, the method comprising:

• forming a resin film that is made of a resin material with a gas barrier property into a specified shape in advance;
• injecting resin into a forming mold that includes a male mold and a female mold, and forming a first layer of a liner;
• placing the resin film to either an inside of the female mold or an outer surface of the first layer after the male mold and the female mold are separated;
• forming a gas barrier layer on the outer surface of the first layer by film insert molding so as to make a two-layer structure;
• and
• welding the liners to each other after the two-layered liner is released from the mold, and heating and curing the welded liners after filament winding molding.

Manufacturing equipment of a liner for a high-pressure tank, the manufacturing equipment comprising:

• a male mold to form the liner;
• a first female mold that creates a space to form a first layer of the liner between the male mold and the first female mold;
• and
• a second female mold with which the first female mold is replaced after the first layer is formed, and that creates a space to form a gas barrier layer on an outer surface of the first layer.