Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – Means permitting removal or substitution of elements during...
Reexamination Certificate
2007-10-02
2007-10-02
Heitbrink, Tim (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
Means permitting removal or substitution of elements during...
C264S328150, C425S190000, C425S549000
Reexamination Certificate
active
10868757
ABSTRACT:
The present invention is a hot runner nozzle design consisting of a nozzle core with slotted flange seated inside a slotted nozzle housing, a nozzle tip seated on the nozzle core, and a nozzle tip seal seated on the nozzle tip. Furthermore, the present invention is a quick assembly hot runner nozzle design. The present nozzle design provides for the easy installation and removal of the nozzle by means of turning and sliding the nozzle. This provides for easy installation or removal of the nozzle when servicing the mold in the machine and without the complete disassembly of the hot runner mold. The seal located on the nozzle tip seals the tip area to avoid plastic leakage. Positioning the seal closer to the gate area also contributes in increased nozzle tip mass thus resulting in a better heat distribution profile along the nozzle tip, and especially in the area closer to the gate. This eliminates nozzle tip freeze up, a critical matter for inside center gate applications that may have extended nozzle tips or tight pitch applications. Furthermore, the seal seated on the nozzle tip allows for a better concentric alignment of the nozzle to gate. Also, positioning the seal close to the gate area decreases color change time because of less volume being trapped around the nozzle tip.
REFERENCES:
patent: 3660552 (1972-05-01), Hinz et al.
patent: 4902218 (1990-02-01), Leonard et al.
patent: 5466145 (1995-11-01), Takahashi
patent: 5846466 (1998-12-01), Abe et al.
Gaul Harald
Gomes Manuel
Meksavanh Bounoth
Romeo Anna Lozyk
Yen Beilei
Borges Elias
Heitbrink Tim
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