| 摘要 |
THE PRESENT INVENTION PROVIDES A MANIFACTURING METHOD FOR MANUFACTORING AN INJECTOR OUTER CYLINDER HAVING A BARREL PORTION HAVING AN EXCELLENT CIRCULARITY, WHILE PREVENTING GENERATION OF DISTORTION OR WARP. A MOLTEN RESIN IS INJECTED INTO A CAVITY 17 OF A METAL MOLD 11 INCLUDING: A FIXED MOLD 13 HAVING A HOLE PORTION 12 HAVING A SHAPE ALONG THE OUTER SHAPE OF THE INJECTOR OUTER CYLINDER 1; A MOVABLE MOLD 14 CLOSING THE HOLE PORTION 12; AND A CORE 15 INSERTED INTO A HOLE PORTION 12. A CYLINDRICAL VACANT PORTION IS PROVIDED COMMUNICATING WITH A FLAGE FORMING PORTION 20 OF THE HOLE 12. THE MOLTEN RESIN R IS INJECTING FROM A SPURE 22 AND A RUNNER 23 VIA A SUBMARINE GATE 24 INTO THE CYLINDRICAL VACANT PORTION 21 AND THE MOLTEN RESIN R IS INTRODUCED INTO THE CAVITY 17. THE CYLINDRICAL VACANT PORTION 21 HAS A PUSH PIN 25. WHEN THE MOLTEN RESIN HAS BECOME HALF-MOLTEN STATE, THE RESIN IN THE CYLINDRICAL VACANT PORTION IS INTRODUCES WITH PRESSURE INTO THE CAVITY 17 BY THE PUSH PIN 25. WHEN THE AMOUNT OF THE MOLTEN PESIN R IN THE CAVITY 17 IS INSUFFICIENT, A WAIT POSITION OF THE PUSH PIN IS MOVED IN A DIRECTION APART FROM THE CONNECTION PORTION OF THE SUBMARINE GATE 24, SO AS TO INJECT THE MOLTEN RESIN R AND SUPPLEMENT THE INSUFFICIE RESIN IN THE CAVITY 17.
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