Tool insert for the initial cut of a hot passage nozzle for...

Details Tool insert for the initial cut of a hot passage nozzle for... Tool insert for the initial cut of a hot passage nozzle for...

2008-01-08

2008-01-08

Heitbrink, Tim (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

C264S328150, C425S549000

Reexamination Certificate

active

11160788

ABSTRACT:
Tool insert for the initial cut of a hot-passage nozzle for an injection molding machine, which tool insert (10) accommodates the anterior (tool side) part of a nozzle and is insertable in turn in a suitably dimensioned recess (21) of the tool (20), which tool insert (10) consists of an anterior cylindrical fitted part (11) having a flow passage (11a) and a receiving head (12) for the tip of the nozzle. At least two cavities (chambers) (23) separated from each other are present between the outer wall (12a) of the receiving head (12) of the tool insert (10) and the wall of the recess (21) in the tool (20), one of which cavities (23) communicates with the supply passage (31) for a coolant, present in the tool, and the other cavity communicates with the discharge passage (32) for the coolant, present in the tool. Also, at least one flow connection is provided between the two cavities (23), preferably located as far as possible from the openings of the coolant passages (31, 32) in the tool.

REFERENCES:
patent: 4622001 (1986-11-01), Bright et al.
patent: 5055025 (1991-10-01), Muller
patent: 5122050 (1992-06-01), Gellert
patent: 6394785 (2002-05-01), Ciccone

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