| 摘要 |
PURPOSE:To prevent the occurrence of surface irregularity of an article and improve the product quality by a method wherein a stepped part is formed at the mating face of metal dies to form a groove inside the metal dies upon die locking and a pinch-off part is provided to press a parison against the bottom of the groove. CONSTITUTION:A stepped part 6 is formed all around the mating face of a cavity die 1 and a core die 2 outside molding face 22 for shaping an article 23 and a groove 7 is formed by the stepped part 6 upon die locking. With the cavity die 1 and the core die 2 locked together, air is supplied into a parison P to bring the same into close contact with the molding face 22 of the cavity die 1 and the core die 2. At this time, the parison P is pinched in the groove 7 in order for a recess part 12 and a projection part 13 to be formed on the parison P near a pinch-off part 11. The recess part 12 and the projection part 13 will in no way be formed outside the groove 7. The burrs 9 in the groove 7 remaining all around the molding are cut off from a cut guide 10. By merely removing the burrs 9, the article having a high appearance quality can be obtained. |
