Patent ID: 9011609
Filing Date: 2015-04-21
Classification: B21D

Abstract:
1. An ironing method comprising: ironing a metal plate having a single surface or both surfaces coated with an organic resin film into a cup; injecting a gas or a liquid to the metal plate at a high pressure to remove an adhered substance from the metal plate during the ironing step, the gas or liquid being injected toward the metal plate radially through an injection port formed in an ironing apparatus extending towards a peripheral circumference of the cup; sucking and collecting the adhered substance removed from the metal plate during the ironing step, the adhered substance being sucked away from the metal plate radially through a suction port, wherein sucking is performed at the degree of vacuum of 0.1 MPa or less and greater than 0 MPa; and reducing dispersion of the gas or liquid by a protrusion extending toward the metal plate; wherein in the injecting step the gas or the liquid is injected into the metal plate at a pressure of 0.4 MPa or higher.