| 摘要 |
PROBLEM TO BE SOLVED: To accurately mold a synthetic resin product by injection compression molding, and to avoid a scratch and a pressing mark from being formed at a main portion of the product.SOLUTION: An injection compression molding method includes: forming a mold face 22 for molding one face of a synthetic resin product 1 at one mold 21; arranging a center region molding mold plate 30 for molding the other face of the synthetic resin product, cores 23 to 25 for forming openings 3 to 7 of the synthetic resin product, and an external peripheral region molding mold plate 35 for molding an external region 11 of the synthetic resin product, at the other mold 20; reciprocally arranging the cores and the external peripheral region molding mold plate to the center region molding mold plate; forming an expansion cavity 50 by pressure-contacting with the mold face 22 by bringing one mold and the other mold into an approximate state and advancing the cores and the external peripheral region molding mold plate; and performing mold-closing while keeping a state that the cores and the external peripheral region molding mold plate are made to pressure-contact with each other after filling a molten resin. |
