| 摘要 |
A method of forming an electrode for a plasma arc torch is disclosed, a nd wherein the electrode comprises a copper holder defining an opening therein. An emissive element is secured to a cavity formed in a relatively non-emissive separator having a solid rear wall at one end thereof. The emissive element and separator are positioned within the opening defined by the copper holder suc h that the emissive element is surrounded by the separator and the copper holder. I n this regard, the emissive element is prevented from movement along the longitudin al axis of the torch relative to the separator during a post-assembly heating step. In addition, the emissive element is not exposed to the atmosphere during the heating step, which allows a greater bond between the emissive element and the separator.
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