| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot runner mold structure which can mold a small circular disk by improving the important structure of a valve gate mechanism and/or the mold. SOLUTION: This hot runner die structure is equipped with a valve gate mechanism which can fill a molten resin of a specified amount in a cavity by opening/closing the gate at the entrance of the cavity by a valve pin 13. In the hot runner mold structure, a straight guide part which guides the distal end of the valve pin when the gate is closed is provided on the mold side. At the same time, a resin release groove which releases the molten resin when the gate is closed is provided on the straight guide part. The outer diameter of the valve pin is set to be larger than the diameter of the gate, and the hot runner mold structure is constituted in such a manner that the gate is closed by the distal end surface of the valve pin. COPYRIGHT: (C)2004,JPO
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