| 摘要 |
PROBLEM TO BE SOLVED: To improve transferability with low injection pressure by using a conventional material for a die including the surface of a cavity by a method wherein a gas vent groove is formed in a peripheral fringe part of the cavity, a hole is provided on a contact surface surrounded by a seal member excepting the peripheral fringe part, and an interconnected gas pressurizing and suction mouth is provided. SOLUTION: A groove 21 (for example, width 5mm×depth 2mm, groove pitch 15mm) is processed excepting a peripheral fringe part of a resin passage of a cavity 6, a sprue, a runner, a gate, etc., in a grid form on a contact surface to a fixed die side on a parting surface between a movable side die 3 and the fixed side die 2. Further, a gasket 20 being a seal member making the cavity 6 an airtight state after closing the die is provided. A gas vent groove is formed on a peripheral fringe part of the cavity 6. Though gas can pass through the gas vent groove, a materiel can not enter that. For example, its depth is about 3/100mm, and its length is about 5mm.
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