| 摘要 |
PURPOSE: To prevent generation of no good appearance such as flow marks, uneven gloss and jetting at the surface of a molded part, and generation of uneven wall thickness and so on. CONSTITUTION: By bringing the ends of a plurality of control pins 5 in/out of a mold cavity 4, injection molding is carried out while controlling flowing direction, flowing speed and pressure distribution inside the cavity of injected resin. It is desirable that the ends of a plurality of control pins 5a, 5b should be selectively-brought in and out with the passage of time. This can be applied to injection compression molding, injection stamping, hollow injection molding and so on in addition to ordinary injection molding. It is thus possible to variably-adjust the flowing condition and pressure distribution of the injected resin 17 in the cavity 4 by the operation of the control pin 5. |
