| 摘要 |
<p>A process for manufacturing a coated wire composite (10) including a core wire (12) having a coating layer of dielectric material (14), which are characterised by inherent thermal contraction coefficients, comprises: (a) providing a preform of dielectric coating material in a cylindrical tubular shape defining an inside and outside diameter of a certain length; (b) aligning a continuous length of the core wire with the inside diameter of the preform for transporting the wire through a coaxial arrangement such that the wire enters the preform at an entrance orifice and exits the preform at an exit orifice; (c) applying heat to the preform for melting a portion in proximity to the exit interface orifice for providing molten dielectric material, where a portion of this molten material is caused to collapse onto the core wire and bond; (d) cooling the molten material on the core wire, to re-solidify the material to form the coated wire composite including a core wire having a coating layer of dielectric material; and, (e) pre-selecting the thermal contraction coefficients of the dielectric and wire to be sufficiently different so that the heating and cooling steps generate stress vectors along a radial (17) and hoop (19) vector in the coating layer of dielectric material. Also claimed is a corona generating electrode of the type used in electrostatographic printing applications, manufactured by the above process.</p> |
