Wire cutting is also known as wire electrical discharge machining (WEDM), is used to cut some mold parts(like sliders, lifter, plate, etc) or geometry. it is manufacturing process of cutting conductive material with a programmed cut path, which a wire electrode travels on the work-piece(mold steel), the diameter of electrode wire is as thinner as 0.1mm~0.3mm.
During the wire EDM machining process, the machine releases an electrical discharge between the wire electrode and the work piece(mold steel), which helps material removes from work piece to obtain desired geometry. Since there is a electrical voltage working the work piece, there will always generates some spark between wire electrode and work piece., To stop the spark, a non-conductive fluid is also needed in the process.
According to different work speed, we can divide wire EDM machining into fast wire EDM machining and slow wire EDM machining.
Normally we use fast wire EDM machining for the outer shape of slider, lifer, ejection pin plate, as it gives higher work efficiency while meeting our dimension requirement, and we use slow wire EDM machining for some inner part geometry like holes, windows, cutout, etc. because slow wire EDM machining offer highly accurate and better physical appearance.