Method for producing high-pressure tank
A method for producing a high-pressure tank capable of winding a reinforcing fiber bundle around a liner without deteriorating tank performance. The method for producing a high-pressure tank by winding a resin-impregnated strip-shaped reinforcing fiber bundle around a rotating liner so as to form a fiber-reinforced resin layer on the outer surface of the liner includes while winding the strip-shaped reinforcing fiber bundle around the liner, concurrently winding another bundle of fibers narrower than the strip-shaped reinforcing fiber bundle around the liner so as to cross the strip-shaped reinforcing fiber bundle.
1. A method for producing a high-pressure tank by winding a resin-impregnated strip-shaped reinforcing fiber bundle around a rotating liner so as to form a fiber-reinforced resin layer including a hoop layer that covers an outer surface of the liner and a helical layer that covers an outer surface of the hoop layer, comprising:
while winding the reinforcing fiber bundle around the liner in a hoop, concurrently helically winding another bundle of fibers narrower than the reinforcing fiber bundle around the liner so as to cross the reinforcing fiber bundle, thereby forming the hoop layer, and
while helically winding the reinforcing fiber bundle around the hoop layer, concurrently winding the other bundle of fibers narrower than the reinforcing fiber bundle around the hoop layer in a hoop so as to cross the reinforcing fiber bundle, thereby forming the helical layer;
wherein while the strip-shaped reinforcing fiber bundle is wound around the liner in a hoop, the other narrower bundle of fibers are concurrently helically wound around the liner so as to cross the strip-shaped reinforcing fiber bundle; and
wherein while the strip-shaped reinforcing fiber bundle is helically wound around the hoop layer, the other narrower bundle of fibers are concurrently wound around the hoop layer in a hoop so as to cross the strip-shaped reinforcing fiber bundle.
2. The method for producing a high-pressure tank according to claim 1 , wherein the other narrower bundles of fibers are wound around the liner or the hoop layer while being heated.
3. The method for producing a high-pressure tank according to claim 1 , wherein the other narrower bundles of fibers are a resin-impregnated reinforcing fiber bundle narrower than the strip-shaped reinforcing fiber bundle.
4. The method for producing a high-pressure tank according to claim 1 , wherein the other narrower bundles of fibers are compatible with the liner.
5. The method for producing a high-pressure tank according to claim 1 , wherein the strip-shaped reinforcing fiber bundle and the other narrower bundles of fibers are wound around the liner or the hoop layer from opposite directions across the liner.
6. The method for producing a high-pressure tank according to claim 1 , wherein the other narrower bundles of fibers are wound around the liner or the hoop layer such that they form a crossing angle in a range of 60° to 90° relative to the strip-shaped reinforcing fiber bundle wound around the liner or the hoop layer.