Method for manufacturing graphite electrode for producing casing mold

Abstract

The invention discloses a method for manufacturing a graphite electrode used in a shell mold. The manufacturing method comprises the following steps: (1) extracting three-dimensional intersecting lines on a cavity of a model of the shell mold to be manufactured, and preparing a first graphite block for the upper part of a molded cavity and a second graphite block for the lower part of the molded cavity by using a plane where the intersecting lines are positioned as a division surface; (2) taking the first graphite block and then manufacturing the first graphite block into a first graphite electrode by adopting a conventional manufacturing method; and (3) taking the second graphite block, then dividing the second graphite block into at least three local blocks comprising a first local block, a second local block and a third local block, wherein all gear racks on each local block have no negative angles in a certain direction; and respectively processing each local block, and then assembling the processed local blocks integrally to form a second graphite electrode. The method has simple manufacturing process, and the molded graphite electrodes have higher precision.

Description

Manufacturing method of graphite electrode used in making shell molds technical field The invention relates to a method for making graphite electrodes used in the process of making shell molds for televisions, monitors, displays and the like. Background technique Taking the TV casing as an example, the current problems encountered in the production of such plastic casing molds are described. The production of TV casing molds requires two types of equipment, CNC machine tools and graphite electric discharge machining machines. Among them, graphite electric discharge machining machines clamp graphite electrodes to discharge, and discharge the cavity parts of the mold, especially stamping out for forming the rear shell. The tooth bar part of the ventilation grille. At present, in order to achieve a better heat dissipation function, the TV casing designed by the designer usually has a single ventilation grill on the cavity surface of the rear casing to form a three-dimensiona...

AI Technical Summary

Problems solved by technology

The present invention aims at the difficult problem in the prior art that the upper tooth bar of the graphite electrode cannot be processed in place at one time, and provides a manufacturing method of the graphite electrode used in the shell mold. The manufacturing process of the method is simple, and the formed graphite electrode has high the accuracy of

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