| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding method which achieves an injection environment balanced in the pressure for cooling molten plastics. SOLUTION: The injection method of molten materials in the present invention includes: a step to feed a pressurized fluid of fluid pressure into a mold cavity, a step to pressurize the molten material to a first melt pressure, a step to start the injection of the molten material when the first melt pressure is balanced with the fluid pressure, a step to increase the first melt pressure continuously to a second melt pressure, a step to inject the molten material into the mold cavity against the pressurized fluid, a step to maintain the fluid pressure while injecting the molten material, and a step to maintain a differential pressure between the fluid pressure and the second melt pressure of the molten material during injection of the molten material. COPYRIGHT: (C)2007,JPO&INPIT
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