| 摘要 |
PROBLEM TO BE SOLVED: To suppress adverse effect by a weld by stirring the resin in a cavity by reciprocatingly moving an insert work at the time of injection filling and subsequently stopping the insert work before a resin is solidified to insert the same into the resin at a predetermined position. SOLUTION: Movable devices 10, 10 also used as the support members of an insert work 7 are inwardly opposed to each other. During a period when a resin 16 has flowability after injection, the movable devices 10, 10 are alternately operated hydraulically and the insert work 7 is reciprocatingly moved in its axial direction to stirr the resin. A stirring region expands as the viscosity of the resin 16 increases accompanied by the cooling of the resin 16 and the boundary of the resin by confluence is disturbed to erase a weld. The reciprocation of the insert work 7 stops the operation of the movable devices 10, 10 before the internal resin is solidified to stop the insert work 7 at a set position and keeps this state until the resin is perfectly cooled and solidifed. By this constitution, a weld is solved and the orientation of fibers in the resin is arranged and the strength of a molded article can be further increased. |
