Welding method and welding structure

Patent metadata

Field	Value
Publication number	US-10434701-B2
Application number	US-201615770383-A
Country	US
Kind code	B2
Filing date	Oct 13, 2016
Priority date	Oct 23, 2015
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

Provided is a method for welding an accessory part made of a thermoplastic resin to a parison which is being molded into a tank body. The method includes steps of: forming the accessory part to include an annular portion having an annular shape and a plurality of projections each projecting from the annual portion in a radially inward direction; and pressing the annular portion and the projections into the parison to be welded to the parison. Also provided is a welding structure of a tank body made of a resin and an accessory part made of a thermoplastic resin and welded to a wall surface of the tank body. The accessory part includes: an annular portion having an annular shape; and a plurality of projections each projecting from the annular portion in a radially inward direction. The annular portion and the plurality of projections are welded to the wall surface.

First claim

The invention claimed is:

1. A welding structure of a tank body made of a resin and an accessory part made of a thermoplastic resin and welded to a wall surface of the tank body,
wherein the accessory part comprises:
an annular portion having an annular shape;
a plurality of projections each projecting from the annular portion in a radially inward direction and having at least two surfaces defining a corner therebetween, the at least two surfaces including an end surface; and
a plurality of recessed portions each of which is formed between adjacent ones of the plurality of projections and has an inner surface defined by one of the at least two surfaces other than the end surface of each of the adjacent ones of the plurality of projections, and
the annular portion and the plurality of projections are welded to the wall surface so that the wall surface of the tank body has portions that have respectively entered the plurality of recessed portions and have been respectively welded to the inner surfaces thereof and so that the corner and the end surface of each of the plurality of projections are welded to the wall surface.

2. The welding structure of claim 1 , wherein the plurality of projections are provided at equal intervals along a circumference.

3. The welding structure of claim 1 , wherein the annular portion and the plurality of projections of the accessory part are integrally molded.

Assignees

• Yachiyo Ind Co Ltd

Inventors

• Kobori Hiroyasu

Classifications

• B29C2049/2047

  Tubular inserts, e.g. tubes · CPC title

• B29K2701/12

  Thermoplastic materials · CPC title

• B29C2791/006

  Using vacuum · CPC title

• B29C2049/2017

  outside the article · CPC title

• B29L2031/7172

  Fuel tanks, jerry cans · CPC title