| US 7,481,649 B2 | ||
| Injection molding apparatus having a nozzle sleeve | ||
| Patrice Fabien Gaillard, Milton, Vt. (US); and Abdeslam Bouti, Swanton, Vt. (US) | ||
| Assigned to Husky Injection Molding Systems Ltd., Bolton, Ontario (Canada) | ||
| Filed on Nov. 30, 2006, as Appl. No. 11/565,307. | ||
| Prior Publication US 2008/0131553 A1, Jun. 05, 2008 | ||
| Int. Cl. B29C 45/20 (2006.01) | ||
| U.S. Cl. 425—549 [425/568] | 23 Claims |
| 1. An injection molding assembly, comprising:
a hot runner that includes an injection nozzle comprising a tip and having an outer periphery;
a mold secured to said hot runner and including:
a mold cavity; and
a nozzle-receiving cavity in fluid communication with said mold cavity and receiving a portion of said injection nozzle, said
nozzle-receiving cavity including a sealing surface and a tip region receiving said tip of said injection nozzle; and
a nozzle sleeve surrounding said outer periphery of at least a portion of said injection nozzle and secured to the injection
molding apparatus independently of said injection nozzle, said nozzle sleeve including a nozzle sealing opening receiving
a portion of said injection nozzle therethrough and configured to form a seal with said injection nozzle at least when said
injection nozzle and said nozzle sleeve are at an operating temperature, said nozzle sleeve springingly urged between said
hot runner and said sealing surface so as to seal said tip region relative to said nozzle-receiving cavity.
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