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Core retaining apparatus for wire-cut electro-discharge machine

Image Number 4 for United States Patent #4996406.

A core retaining apparatus for a wire-cut electro-discharge machine which is capable of effectively and reliably retaining a core cut out of a workpiece by wire-cut electro-discharge machining when the core is removed to a position outside the machining area. The core retaining apparatus comprises a core retaining element for retaining a core cut out of a workpiece, the element being elastic and having a space therein, and pressure control elements for maintaining the pressure inside the space at a desired value.

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