a : something which is formed by casting in the mold or variety: like (1) : a reproduction (as of the statue) in metallic or plaster : casting (two) : a fossil copy of the small print of a organic object by mineral infiltration b : an impression taken from an item which has a liquid or plastic compound : mildew They manufactured a mask from a wax cast of her encounter.

from the melancholy scrap and junk go here imply throwing absent or breaking apart as worthless in existent type.

discard indicates the letting go or throwing away of a thing that has become ineffective or superfluous while frequently not intrinsically valueless.