Non-stringing nozzle 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.
Claims24
A nozzle tip, comprising:
- a nozzle tip body;
- a nozzle tip inlet end for ingress of a molten resin;
- a nozzle tip outlet end for egress of the 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,
- the tip insert is installed at the apex of the nozzle tip outlet end, and the tip insert is positioned flush with the mold parting line,
- wherein in steady state, the molten resin will freeze, or solidify, over time since the tip insert sufficiently blocks the conduction of heat to a gate orifice from the rest of the nozzle tip body, and a solidified resin at the gate orifice will not induce a string nor a vestige since the tip insert is positioned flush with the mold parting line.
A nozzle tip, for use in a hot runner, comprising:
- a nozzle tip body;
- a nozzle tip inlet end for ingress of a molten resin;
- a nozzle tip outlet end for egress of the 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,
- the tip insert is installed at the apex of the nozzle tip outlet end, and the tip insert is positioned flush with the mold parting line,
- wherein in steady state, the molten resin will freeze, or solidify, over time since the tip insert sufficiently blocks the conduction of heat to a gate orifice from the rest of the nozzle tip body, and a solidified resin at the gate orifice will not induce a string nor a vestige since the tip insert is positioned flush with the mold parting line.
Dependencies are inferred from the claim text.