| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold assembly capable of easily obtaining filling balance without performing correction processing of a multi-cavity mold for molding a resin and having a simpler core pin structure. SOLUTION: Pin cases 11, 21, 31 and 41 having the same shape are provided from runner molds 10, 20, 30 and 40 in parallel to a nozzle 6, and core pin insertion holes are formed to the pin cases. Core pins have heads 112, 212, 312 and 412 and shafts 111, 211, 311 and 411, and the heads of the core pins are common in length but the shafts thereof have various lengths. The shorter core pins are inserted into the pin cases provided to the molds more remote from the nozzle 6. By selecting the core pins to be inserted corresponding to a filling state, the correction of the balance of the cross-sectional areas of the runners from a resin supply passage to the respective molds can be facilitated.
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