| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection-molding method and an injection-molding apparatus which do not inject a resin simultaneously from a plurality of resin injecting portions to a cavity when resin filling is started. SOLUTION: Valve pins 5a, 5b and 5c are mounted in a cold runner 3 of a die 1 facing the vicinity of gates 4a, 4b and 4c. When resin filling is started, the valve pin 5a moves to open the gate 4a while the valve pins 5b and 5c close the gates 4b and 4c respectively and then the molten resin passes from the cold runner 3 through the gate 4a into a cavity 2. When a predetermined time passes after starting the resin filling, the valve pins 5b and 5c move to open the gates 4b and 4c and then the molten resin passes from the cold runner 3 through the gates 4b and 4c into the cavity.
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