| 摘要 |
PURPOSE:To obtain a precision molding which is superior in an external appearance and strength, not having a residual boil and a sink and having small internal strain, by a method wherein the inside of a specific mold which is under a decompressed state, is restored to an atmosphered pressure after injecting resin into the same, which is cured while being applied air pressure. CONSTITUTION:Such a quantity of liquid resin as to remain an appropriate quantity of the resin in a reservoir part 5 of the resin is injected into a molding cavity 2 of a mold 1 including a reservoir part 11 of the resin fixed to a vent hole 10 through a bung hole 3 from the reservoir part 5 of the resin under a decompressed state. Then the pressure is restored to atmospheric pressure, the mold 1 is sealed up tightly by closing a cock 8 by either streaming compressed air of 0.01-0.5kg/cm<2> through a pipe 7 or keeping the above-mentioned air pressure applied to the mold 1 further, and precision molding is obtained by making the injected resin cure through heating.
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