The invention relates to a plastic injection technique, especially the improvement for molding plastic coat hanger, wherein the section chamber mould and section core mould can be closed and separated; when they are closed, they form the coat hanger section chamber between them; pouring the fused plastic from the top of section chamber mould, via the pour open at the top into the coat hanger section chamber, to be solidified and remove the mould; then slicing the plastic coat hanger, and drilling the thin layer at hook hole at the slicing cut. The invention can improve the producing efficiency and reduce the waste material. |