New Mold Manufacturing Techniques(Surface and edge finishing)

概要

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Typically, molds are manufactured from SiC and WC. Both materials can mold several hundred parts before deforming during processing. The material hardness also makes manufacturing molds from SiC and WC very difficult and time consuming. In this paper, we present some initial results using an alternate mold material, glassy carbon. Glassy carbon is an amorphous material with a lower hardness than either SiC or WC. Its lower hardness and amorphous structure makes it easier to diamond grind and polish using Magnetorheological Finish (MRF^[○!R]). After reviewing key material properties of glassy carbon material, this paper will describe some collaborative activities between Toshiba Machine Co., Ltd. and QED Technologies to manufacture representative examples of glassy carbon. Details of the grinding, pre-polishing and final polishing process will be provided along with the resultant metrology results after key steps. Molding experiments based on these developments will also be presented.
2005-10-18