Non-stringing hot tip
AssigneeHusky Injection Molding Systems Ltd.
InventorsAbdeslam Bouti, Stephen Linwood Gray
Life of this patent
Estimating the term…
Abstract
Disclosed is a nozzle tip, having a tip insert attached to a nozzle tip outlet end of a nozzle tip body, the tip insert being made of a material, or having a thermal barrier coating, having a thermal conductivity value of K<10 W/m° K, and having a lower thermal conductivity than that of the nozzle tip body, to preclude the conduction of excessive heat to the nozzle tip outlet end, and promoting a more decisive fracture of the solidified resin at a gate orifice upon ejection of a molded product, thereby eliminating a string of molten resin and a vestige of excessive height, both of which are undesirable, on the molded product.
Claims25
A nozzle tip, comprising:
- a nozzle tip body;
- a nozzle tip inlet end for ingress of molten resin;
- a nozzle tip outlet end for egress of molten resin;
- a nozzle tip melt channel, located axially therethrough;
- and
- a tip insert, distally attached to the nozzle tip body at the nozzle tip outlet end, wherein the tip insert has a thermal conductivity value of K<10 W/m° K.
A nozzle tip, for use in a hot runner, comprising:
- a nozzle tip body;
- a nozzle tip inlet end for ingress of molten resin;
- a nozzle tip outlet end for egress of molten resin;
- a nozzle tip melt channel, located axially therethrough;
- and
- a tip insert, distally attached to the nozzle tip body at the nozzle tip outlet end, wherein the tip insert has a thermal conductivity value of K<10 W/m° K.
A method of reducing and occurrence of a formation of a string of resin on
- a molded product, comprising the steps of:
- reducing the amount of heat conducted to a gate orifice by a nozzle tip by attaching a tip insert to a nozzle tip outlet end of a nozzle tip body, the tip insert having a lower thermal conductivity value than that of the nozzle tip body, wherein said lower thermal conductivity value is K<10 W/m° K;
- and
- installing the nozzle tip in the gate orifice approximately flush with a mold parting line.
Dependencies are inferred from the claim text.