Injection Mold Companies use three main methods to manufacture molds: CNC number control milling machining and EDM, Wire cut machine... With technological development, CNC machining became the predominant means of making more complex molds with more accurate mold details in less time than traditional methods. Computer numeric controlled machining centers are used to produce a wide range of components. And tooling costs involved have continued to become more affordable. In general, large production runs requiring relatively simple designs are better served by other methods, although CNC machining can now accommodate a wide range of manufacturing needs. CNC milling centers are ideal solutions， everything ranging from prototyping and short-run production of complex parts. The fabrication of unique precision components.
The basic EDM process is really quite simple.
An electrical spark is created between an electrode and a workpiece. Electric Discharge Machining The spark is visible evidence of the flow of electricity. This electric spark produces intense heat with temperatures reaching 8000 to 12000 degrees Celsius, melting almost anything. The spark is very carefully controlled and localized so that it only affects the surface of the material. The EDM process usually does not affect the heat treatment below the surface. With wire EDM the spark always takes place in the dielectric of deionized water. The conductivity of the water is carefully controlled making an excellent environment for the EDM process. The water acts as a coolant and flushes away the eroded metal particles.
WIRE CUT MACHINE
Wire cutting uses a metallic wire to cut a programmed contour in a workpiece. Extrusion dies and blanking punches are very often machined by wire cutting. Cutting is always through the entire workpiece. To start machining it is first necessary to drill a hole in the workpiece or start from the edge. In the machining area, each discharge creates a crater in the workpiece and an impact on the tool. The wire can be inclined, thus making it possible to make parts with taper, or with different profiles at the top and bottom. There is never any mechanical contact between the electrode and the workpiece (see above). The wire is usually made of brass or stratified copper and is between 0.1 and 0.3 mm in diameter.
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