Ngk Spark Plug Company, Limited

Wataru Kawagishi

Yoshihiko Kohmura

Yusuke Fuji

Shingo Yoshida

Shinji Kumazawa

Satoru Toda

Takashi Koda

Takaya Hirai

Hitoshi Nakano

A method for producing a resin joined body in which a specific region Lof a welding portion of a second resin member () is provided to form a low-laser-light-transmissible portion, and the low-laser-light-transmissible portion has a laser light transmissibility lower than that of a region of the welding portion other than the specific region L. Welding is carried out so that a portion between points Sand F, serving as a weld overlap portion (), is present in the specific region Lforming the low-laser-light-transmissible portion. Also disclosed is a resin joined body.

Resin joined body and method for manufacturing same

A method and apparatus for manufacturing a welded resin article which includes (a) bringing first and second resin members to come into contact with each other; (b) applying laser light to the first and second resin members while moving the laser light relative to the first and second resin members; (c1) obtaining a value corresponding to the intensity of infrared light from a plurality of locations on a surface; (d) successively calculating, as a section average, the average of a predetermined number of successive values, among those obtained from the plurality of locations corresponding to the intensity of the infrared light; (e) a step of successively calculating a deviation judgment value; and (f) a step of successively judging whether or not the deviation judgment value falls within a predetermined judgment threshold range.

Method and apparatus for manufacturing welded resin article

A case comprised of a metal-resin composite body having a connector including a terminal fitting, the connector being integrated with an opening of a wall of a case main body so that the connector sandwiches an edge of the wall. The connector is comprised of a base resin formed by injection molding so as to sandwich the wall. A separately-manufactured connector is welded to the base resin. Forming the base resin on the case main body provides a less complicated configuration of the case compared to a case where a connector is formed directly to the case main body.

Metal-resin compound member

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Nagoya, Japan

Wataru Kawagishi