(54) INJECTION MOLDING NOZZLE TIP
(75) Inventor: Vince Ciccone, Kleinberg (CA)
(73) Assignee: Injectnotech Inc., Mississauga, Ontario (CA)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 411 days.
(21) Appl. No.: 10/934,544
(22) Filed: Sep. 3, 2004
(65) Prior Publication Data
US 2005/0095313 Al May 5, 2005
Related U.S. Application Data
(60) Provisional application No. 60/500,442, filed on Sep. 5, 2003.
(51) Int. CI.
B29C 45/20 (2006.01)
(52) U.S. CI 425/549; 264/328.15
(58) Field of Classification Search 425/549;
See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
2,529,146 A * 11/1950 Feitl 425/549
5,299,928 A 4/1994 Gellert
6,394,785 Bl * 5/2002 Ciccone 425/549
A series of injection molding nozzles, one series having a two-piece nozzle and the other series having a three-piece nozzle. The two-piece nozzles include an inner and an outer insert portions, and the three-piece nozzles include an inner insert, an outer insert and a retaining thermal ring portions. The nozzles in accordance with the embodiments of the present invention include one, or more novel feature and which include: an extended thermo-barrier, a thermo-barrier access gap, threaded engagements between the nozzle pieces and/or between the nozzle and the nozzle housing, as well as structure elements that enable an improved methods for the removal and/or replacement of the nozzles from their housing. In addition, different performance conditions are encouraged in the nozzle designs by use of different or same thermal conductivity and/or hardness type materials. For example, materials may be selected such that the individual nozzle pieces are all made of the same material, different materials or combinations thereof.
21 Claims, 22 Drawing Sheets