Flow passage assembly and method for manufacturing flow passage assembly, inkjet recording head, and recording apparatus

摘要

A method for manufacturing a flow passage assembly includes forming a first flow passage in a first joint interface formed by welding a first surface of a first flow passage forming member to a first surface of a second flow passage forming member using an ultrasonic welding process, and forming, after the first flow passage is formed, a second flow passage in a second joint interface formed by welding a first surface of a third flow passage forming member to one of a second surface of the first flow passage forming member and a second surface of the second flow passage forming member using an ultrasonic welding process. A total area of weld portions used when the first flow passage is formed is greater than a total area of weld portions used when the second flow passage is formed.

主权项

1. A method for manufacturing a flow passage assembly, comprising:
forming a first flow passage in a first joint interface formed by welding a first surface of a first flow passage forming member to a first surface of a second flow passage forming member using an ultrasonic welding process; and forming, after the first flow passage is formed, a second flow passage in a second joint interface formed by welding a first surface of a third flow passage forming member to one of a second surface of the first flow passage forming member and a second surface of the second flow passage forming member using an ultrasonic welding process, wherein a total area of weld portions used when the first flow passage is formed is greater than a total area of weld portions used when the second flow passage is formed, wherein one of the two flow passage forming members that form each of the first joint interface and the second joint interface has a protruding welding rib formed thereon, wherein the welding rib is welded using the ultrasonic welding process, and wherein a volume of the welding rib located in the first joint interface is greater than a volume of the welding rib located in the second joint interface.