|Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2003: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥2,000,000 (Direct Cost: ¥2,000,000)
The laser beam lithography is widely applied to trial product. Resin pattern may required for various test, however, since heat resistant and mechanical properties of resin pattern was inferior to that of the metal.
Therefore, if a resin pattern is quickly copied by the metal castings, time for trial is expected to be remarkably shortened.
Then, the resin pattern was set in a plaster mold and heated up to the temperature the resin completely burnt out, then molten metal was cast in the mold. As the result, in case of the thick pattern, crack was generated in the plaster mold. However, thin pattern was able to be copied to the metal castings. The crack was generated in the mold, since coefficient of thermal expansion was higher than that of the plaster, and the gas pressure was increased by the burning.
Then, effect of heating rate on the crack of the mold was investigated. In case of heating rate of mold was low, gas pressure was lowered, the mold was prevented from crack, and resin pattern was able to be copied to metal castings. New photopolymer for burning pattern in the mold are expected for further development of the process.