Manufacturing method for tank

Patent metadata

Field	Value
Publication number	US-11400640-B2
Application number	US-201916424609-A
Country	US
Kind code	B2
Filing date	May 29, 2019
Priority date	Aug 31, 2018
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

A manufacturing method for a tank is a method of manufacturing the tank by winding fibers impregnated with an epoxy resin in a plurality of layers around an outer circumference of a liner having a body part and dome parts provided at both ends of the body part. The manufacturing method includes sequentially laminating a plurality of hoop layers by hoop-winding the fibers from a side closer to an outer circumference of the body part toward a side farther from the outer circumference of the body part. When laminating the hoop layers, a temperature of end portions of the body part adjacent to the dome parts is set lower than a temperature of a remaining portion of the body part, the remaining portion being a portion of the body part other than the end portions.

First claim

What is claimed is:

1. A manufacturing method for a tank, the manufacturing method manufacturing the tank by winding fibers impregnated with a resin in a plurality of layers around an outer circumference of a liner having a body part and dome parts provided at both ends of the body part, the manufacturing method comprising:
sequentially laminating a plurality of hoop layers by hoop-winding the fibers from a side closer to an outer circumference of the body part toward a side farther from the outer circumference of the body part,
wherein when laminating the hoop layers, a temperature of end portions of the body part adjacent to the dome parts is set lower than a temperature of a remaining portion of the body part, the remaining portion being a portion of the body part other than the end portions; and
wherein the temperature of end portions of the body part adjacent to the dome parts is lower than a temperature at which the hoop layers are thermoset.

2. The manufacturing method for the tank according to claim 1 , wherein the resin is an epoxy resin.

3. The manufacturing method for the tank according to claim 1 , wherein when laminating the hoop layers, the temperature of the end portions of the body part adjacent to the dome parts is set at 16° C. or less.

4. The manufacturing method for the tank according to claim 1 , wherein when laminating the hoop layers, the temperature of the end portions of the body part adjacent to the dome parts is set at 16° C. or less and 5° C. or more.

5. The manufacturing method for the tank according to claim 1 , wherein when laminating the hoop layers, the temperature of the remaining portion of the body part is set at 20° C. or more and 25° C. or less.

6. The manufacturing method for the tank according to claim 1 , wherein:
when laminating the hoop layers, the fibers are hoop-wound from a first end portion of the end portions of the body part to a second end portion of the end portions of the body part such that an Nth hoop layer, N being an integer of 1 or more, is formed; and
the fibers are turned back at the second end portion and hoop-wound such that an (N+1)th hoop layer is formed on an outer side of the Nth hoop layer.

Assignees

• Toyota Motor Co Ltd

Inventors

• Iida Yasuhiro

Classifications

• F17C2260/011

  Improving strength · CPC title

• B29L2031/7172

  Fuel tanks, jerry cans · CPC title

• F17C2203/012

  on or in the wall, e.g. ribs · CPC title

• F17C2270/0168

  by vehicles · CPC title

• B29C63/0073

  of non-flat surfaces, e.g. curved, profiled (B29C63/042 takes precedence) · CPC title