| 摘要 |
<p>An injection molding method and an injection mold used therefor are provided, in which a molded product free from burrs, whitening and gate marks can be obtained with a simple structure mold, and it can adequately serve the needs for multicavity molding as well. The injection molding method comprises the steps of: introducing and charging a molten resin material into a resin reservoir (12) and a molding cavity (10) of an injection mold, a depth (L1) of the resin reservoir (12) being larger than a thickness (L2) of a communicating portion (11); and moving a cut punch (15), when a portion (27) of the resin material in the resin reservoir (12) is still molten, to push the molten resin (27) in the resin reservoir (12) back from a gate (14) into a runner (7) so that the cut punch (15) not only closes the communicating portion (11) but also cuts a resin solidified portion in the resin reservoir (12) away from a resin molded product in the molding cavity (10) at the communicating portion (11).</p> |
