| 摘要 |
<p>The use of cathode plates for electrolytic copper deposition, coupled with mouldings fitted for edge protection is well established. These include such things as edge strips, gripping edge protectors and dipping in wax, to prevent build-up of the plated metal along the edge portion. These edge protectors are quite effective along the sides, but attempts to fit protectors to the bottom edge of the plates have resulted in the build-up of copper in the gaps at the corner of the plate or the growth of copper nodules beneath the protecting strip, occasioned by thermal expansion and resultant small gaps at the joins. Wax, moreover, dissolves in hot electrolyte solution, causing a build-up of sludge in the refining tanks with substantial reduction in the life and efficiency of the electrolyte. These problems have been overcome by prefiting the cathode plate (10) with bottom (16) and side (11) edge plastic strips, in which the bottom (16) and side (11) edge plastic strips, together with the corner pieces (17), are integrally moulded together, the bottom edge corners of the plate being surrounded in the mould, prior to the injection of the plastic. Alternatively, the bottom and side edge strips (20) and the corner pieces (21) may be prefabricated, so that the corner pieces (21) lock into the plate by means of apertures and are either joined to the bottom and side edge portions (20) by plastic moulding of the corner piece (21) to the joint between the aforesaid bottom and side edge portions (20) or upper (22) and lower (23) wedge clips may be used to snap fit the corner moulding (21) and the bottom and side edge portions (20) together in sealing relationship.</p> |
