Patent ID: 7165433
Filing Date: 2007-01-23
Classification: B21K,B41J,Y10T

Abstract:
1. A method of manufacturing a chamber formation plate of a liquid ejection head, including a first region adapted to be formed with at least communicating ports passing through the chamber formation plate and recess portions adapted to be pressure generating chambers communicated with nozzles, from which liquid droplets are ejected by pressure generated in the pressure generating chambers, through the communicating ports, the method comprising steps of: providing a metal plate and a forging die including a first forging die and a second forging die; providing a reference part on the metal plate, the reference part securing a relative position between the first region and the forging die; providing at least one deformation absorber, at a second region of the metal plate, between the first region and the reference part; and performing at least two plastic working by the first forging die and the second forging die, with respect to the first region to form at least the recess portions and the communicating ports, while plastic deformation of the metal plate caused by the plastic working is absorbed by the deformation absorber, wherein the step of providing the deformation absorber is performed before the step of performing at least the two plastic working.