| 摘要 |
PROBLEM TO BE SOLVED: To easily mold even a resin inferior to flowability into a thin-walled molded product and to reduce a residual stress crack by performing the molding of an inside surface part by injection compression molding. SOLUTION: In an injection compression molding machine, a movable mold part 20B is stopped at the position on this side by a dimension A and a cavity 20C is filled with a molten resin 30. Next, the movable mold 20B is allowed to advance to add compression force to the molten resin 30 to fill the cavity 20C with the molten resin 30 every nook and corner and, next, the surface of the molten resin 30 is cooled to take out a molded product. Next, a thinwalled inside surface part 31 molded by injection compression molding is mounted on the molding surface 52 of the movable mold part 50B of an injection molding machine 2 by the suction port 54 opened to the molding surface 52. The suction port 54 sucks the inside surface part 31 by a vacuum pump through the pressure guide passage 55 in the movable mold part 50B and the mold 50 is closed and, after the mold is closed, the cavity 50C is filled with a molten resin 60 every nook and corner by an injection device 40 to cool and solidify the molten resin. |
