| 摘要 |
PURPOSE:To ensure that a molding spool part or a molding runner part can be separated from a molding when forming and parting the molding having a nearly U cross-section. CONSTITUTION:A float core 33 which is separated from a movable die 2 is arranged on the movable die 2 corresponding to a fixed die 1. In addition, recessed parts 33b, 33d are formed in an area 33a where the spool 46 of the float core 33 is formed and an area 33c where a runner 47 is formed. The depth of the recessed parts 33b, 33d is such that a molded runner part 57 formed by the runner 47 can be attached to the float core 33 side by the engagement of ribs 56c, 57a formed by the recessed parts 33b, 33d during the extrusion of an extrusion core 34, and the ribs 56c, 57a can be released from the float core 33 during the extrusion of a molded spool part 56 formed by the spool 46 using the tip of a spool lock pin 43 following the return of the float core 33 to the movable die 2. |
