Mold for forming disc, method for manufacture same, and mold parts
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United States of America Patent
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N/A
Issued Date -
Mar 19, 2009
app pub date -
May 17, 2006
filing date -
May 19, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An object is to improve the wear resistance of a mold part and improve accuracy of disc substrates. A disc-molding mold comprises a first mold including a first support plate and a first mirror-surface disc attached to the first support plate; and a second mold including a second support plate and a second mirror-surface disc attached to the second support plate. A sliding surface of a mold part disposed on one of the first and second molds is treated by means of low-temperature nitriding. In this case, since the mold part is treated by means of low-temperature nitriding, the wear resistance of the mold part can be improved. In addition, since the treatment temperature is low, even when low-temperature nitriding is performed on a mold part which is complicated in shape, the mold part does not deform, and its dimensional variation can be decreased.
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