Melt spinning nozzle tip

Details Melt spinning nozzle tip Melt spinning nozzle tip

B - Operations, Transporting

29

C

18/703

B29C 45/30 (2006.01) B29C 45/28 (2006.01)

Patent

CA 1149568

ABSTRACT OF THE DISCLOSURE This invention relates to an improved valve-gated injection molding system. The hot runner passage through which the melt flows to the cavity is divided into three spiral-shaped channels which converge again immediately before the gate, thereby imparting a curving motion to the melt as it flows outward from the gate in the cavity. This avoids unidirectional molecular orientation of the melt, thereby providing a stronger molded product. In a preferred embodiment of the invention, the melt channels reduce in helical diameter and cross sectional area as they approach the gate, thereby accelerating the swirling motion of the melt.

352349

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