Method of manufacturing external panel of laundry treatment apparatus, and pattern formation apparatus and cleaning apparatus of the external panel

摘要

The present invention relates to a method of manufacturing an external panel of a laundry treatment apparatus, and a pattern formation apparatus and cleaning apparatus of the external panel. According to an embodiment of the present invention, the method of manufacturing the external panel of the laundry treatment apparatus includes a panel formation step of forming an external appearance of the external panel, a pattern formation step of forming a predetermined pattern in the surface of the external panel, and a panel wash step of washing the external panel in which the pattern is formed by means of supersonic vibration. Accordingly, the external panel made of a metal material, which has a predetermined pattern formed on its surface, is mounted at the front of the door. It is therefore possible to improve the strength and beauty of the door. Furthermore, there is an advantage in that the corrosion and rust of the external panel, which are incurred by the oxidization effect of impurities, such as microchips, which are generated when the pattern is formed in the surface, can be prevented.