| 摘要 |
PROBLEM TO BE SOLVED: To prevent a weld line from being generated by inexpensive cost. SOLUTION: The titled apparatus consists of injection flow paths 2 and 3 for filling a material transferred from an injection molding machine into a cavity 4, driving flow paths 7 and 8 provided separately from the injection flow paths 2 and 3, piston means 9 and 10 for butting the materials in the cavity 4 by performing piston movements and repeating alternately compression by forwarding from both sides while a weld is placed between them and releasing the compression by retreating, driving means 11 and 12 for converting the piston means 9 and 10 to the piston movements by the pressure of the material transferred into the driving flow paths 7 and 8 and switching means 13 and 14 for transferring the material from the injection molding machine into the driving flow paths 7 and 8 after or in the midst of transferring the material into the cavity 4 from the injection flow paths 2 and 3.
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