Patent ID: 7316560
Filing Date: 2008-01-08
Classification: B29C

Abstract:
1. 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 in turn is insertable in a suitably dimensioned recess ( 21 ) of a tool ( 20 ), which tool insert ( 10 ) consists of an anterior cylindrical fitted part ( 11 ) having a flow passage ( 11 a ) and a receiving head ( 12 ) for the tip of the nozzle, characterized in that at least two cavities (chambers) ( 23 ) are present between the outer wall ( 12 a ) of the receiving head ( 12 ) of the tool insert ( 10 ) and the wall of the recess ( 21 ) in the tool ( 20 ), of which at least one cavity ( 23 ) is in communication with the supply passage ( 31 ) for a coolant, present in the tool, and the other cavity is in communication with the discharge passage ( 32 ) present in the tool for the coolant, and in that at least one flow connection is present between the at least two cavities ( 23 ), preferably located as far as possible from the openings of the said coolant passages ( 31 , 32 ) in the tool.