| 摘要 |
According to the present invention, a nozzle cap is provided which has a housing end that threadedly engages the nozzle housing to secure the nozzle tip to t he nozzle housing. The remainder of the cap substantially fills the space betwe en the nozzle tip and the gate insert while maintaining a small clearance between t he cap and both the nozzle tip and the gate insert in the region surrounding an outlet end of the nozzle. The clearance prevents direct conductive heat transfer from t he outlet end of the nozzle tip to the gate insert yet is sufficiently small enough to substantially eliminate melt to flow past it.
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