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Welding joint of fuel tank

A technology for welding joints and fuel tanks, which is applied to non-removable pipe connections, pipes/pipe joints/pipes, passing components, etc. The effect of resistance to fuel penetration and excellent weldability

Inactive Publication Date: 2006-04-26
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the welded joint 248 is constructed of multiple materials in this manner, there is an inherent problem of increased molding process and thus inevitably a corresponding increase in cost

Method used

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  • Welding joint of fuel tank
  • Welding joint of fuel tank
  • Welding joint of fuel tank

Examples

Experimental program
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Embodiment Construction

[0083] Now, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0084] see figure 1 and 3 , Reference numeral 10 denotes a resin fuel tank. Here, the fuel tank 10 is formed in a stacked structure consisting of an outer layer 10a, an inner layer 10b made of HDPE resin, and a thin barrier layer (middle layer) 10c.

[0085] Here, the barrier layer 10c is made by using EVOH resin excellent in fuel permeation resistance.

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PUM

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Abstract

A fusion joint has a cylindrical portion as a connecting portion and an annular welded portion arranged at a base end portion of the cylindrical portion, the welded portion being configured to be thermally welded to a fuel tank made of resin. At least part of the welded portion and the cylindrical portion are integrally molded by using a resin alloy material in which modified high-density polyethylene obtained by introducing a functional group having a high affinity for hydroxyl groups of an ethylene-vinyl alcohol copolymer Alloyed with ethylene-vinyl alcohol copolymer alone or with high-density polyethylene.

Description

technical field [0001] The present invention relates to a resin-made joint for connecting a piping pipe or a connector to a resin-made fuel tank, and more particularly, to a resin-made welded joint that is welded to the fuel tank to constitute a connecting portion. Background technique [0002] A fuel tank mounted on an automobile is integrally provided with a joint for connecting a pipe, a connector for introducing fuel injected from an inlet into the fuel tank, and the like. [0003] Here, for example, in the case of a pipe for introducing fuel from an injection port into a fuel tank, a rubber pipe (rubber hose) has hitherto been used. However, in recent years, the permeation of fuel to the outside through the hose has been strictly controlled in consideration of environmental protection. Therefore, rubber / resin composite pipes in which the rubber hose further includes a resin barrier layer, a rubber pipe made of fluororubber having fuel permeation resistance, or a resin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L13/00B29C70/84B60K15/03
Inventor 西山高广笹井建典片山和孝伊藤弘昭仁木伸明铃明淳一朗
Owner SUMITOMO RIKO CO LTD
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