Method for manufacturing out plate for refrigerator

A method for manufacturing an out plate for a refrigerator, wherein the out plate defines a front surface of a door of the refrigerator, the method comprising:

• providing a steel plate with a first protective film attached to a front surface thereof;
• forming a plurality of through holes in the steel plate, the forming step comprising:
• seating the steel plate on a die and forming one of the plurality of through holes by a movement of a punch, and
• moving the steel plate to one of a plurality of set positions to form another one of the plurality of through holes by the punch;
• attaching a diffusion sheet configured to shield the plurality of through holes on a rear surface of the steel plate;
• providing a hole-filling material through an open front surface of one of the plurality of through holes to form a hole-filling member configured to shield the one of the plurality of through holes, wherein the hole-filling material is provided to a height corresponding to a height of an upper surface of the first protective film;
• and
• removing the first protective film,
• wherein the first protective film is configured to restrict the hole-filling material from being deposited around the plurality of through holes;
• wherein each of the plurality of through holes is formed by penetrating the first protective film and the steel plate with the punch prior to removing the first protective film, and
• wherein the moving of the steel plate and the forming of one of the plurality of through holes by the punch are repeatedly performed while the steel plate is seated on the die at other ones of the plurality of set positions.