SCREEN PLATE STRUCTURE

摘要

Provided is a screen plate structure. According to the present invention, the screen plate structure comprises: a first screen plate including a plurality of first apertures; a second screen plate including a plurality of second apertures and disposed at the bottom of the first screen plate so as to support the first screen plate; and a screen support plate disposed on one side of the first screen plate and the second screen plate. The size of the selected apertures at a position where the first apertures and the second apertures are overlapped each other can be adjusted, as the first screen plate moves in a first direction parallel to an upper plane of the first screen plate.