| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressurized fluid injection nozzle capable of injecting a pressurized fluid smoothly and surely with a simple structure. SOLUTION: This pressurized fluid injection nozzle 10 is composed of a center pin 20, a first sleeve 30 and a second sleeve 40, and a plurality of slits 32 are formed at the tip part 31 of the first sleeve 30. And, in an introduction stage of molten thermoplastic resin into a cavity, the gap between the inner face of the tip part 31 of the first sleeve 30 and the outer face of the tip part 21 of the center pin 20 is in a narrow state, while in an injection stage of the pressurized fluid, the tip part 31 of the first sleeve 30 is widened, so that the pressurized fluid is injected into the inside of the molten thermoplastic resin introduced in the cavity from a flow channel 23 of the pressurized fluid through the gap widened between the inner face of the tip part 31 of the first sleeve 31 and the outer face of the tip part 21 of the center pin 20. COPYRIGHT: (C)2005,JPO&NCIPI
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