Apparatus for molding a profiled body

A molding apparatus for casting a molded body such as a grinding or polishing tool having at least one contoured surface complementary to a first profiled surface of a work piece to be ground or polished by said tool, comprising a base plate, side walls, a cover plate and two end walls facing each other for forming at least one molding cavity, each end wall having a hole therein, an elongated contouring insert member extending longitudinally through said holes in said end walls so as to pass longitudinally through said molding cavity, said contouring insert member having a second profiled surface corresponding to said first profiled surface of a work piece, and adjustable sealing means having at least one edge adjustable in its contour so that said one adjustable edge defines a contour substantially conforming to said second profiled surface of said insert member for sealingly closing each hole in said end walls, and wherein each said adjustable sealing means comprise a plurality of substantially planar sealing elements which are individually adjustable in their position relative to each other in a direction extending perpendicularly to said base plate, said molding apparatus further comprising means for adjustably mounting said sealing elements in said molding apparatus.