US 9,073,246 B2Granted

Coinjection hot runner injection molding system

AssigneeMold-Masters (2007) Limited

InventorsValery Ten, Fabrice Fairy, Denis Babin, Scott Gammon

Life of this patent

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Abstract

A coinjection molding apparatus is disclosed that provides first and second material melt streams to a nozzle. The nozzle defines a first material melt passage for receiving the first material melt stream, a second material melt passage for receiving the second material melt stream and an outer layer melt passage, which receives a portion of the first material melt stream from the first material melt passage. The first material melt stream from the first material melt passage forms an inner layer of a molded article, the second material melt stream from the second material melt passage forms a core layer of the molded article, and the first material melt stream from the outer layer melt passage forms an outer layer of the molded article, wherein the three melt streams combine prior to entering a mold cavity.

Claims20

Dependent claims

A coinjection nozzle for delivering molding material to a mold gate, the coinjection nozzle comprising:

a nozzle tip coupled to a downstream end of the nozzle, the nozzle tip having,
a first material melt passage for receiving a first material melt stream from a first material melt source,
a second material melt passage for receiving a second material melt stream from a second material source,
a tunnel channel extension defining a tunnel channel, and
an outer layer melt passage fluidly connected to the first material melt passage via the tunnel channel, wherein the tunnel channel directs a portion of the first material melt stream received by the first material melt passage to the outer layer melt passage, and wherein the tunnel channel crosses the second material melt passage such that the second material melt stream flows around an outer surface of the tunnel channel extension.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/275,240Filed 12 May 2014 · continuation
Priority: 21 Sep 2010
Published: US 2014/0248385 A14 Sep 2014
Granted: 7 Jul 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B29C 45/20
Component parts, details or accessories; Auxiliary operations: injection nozzles
B29C 45/1603
Making multilayered or multicoloured articles: multi-way nozzles specially adapted therefor
B29C 45/1607
Multi-way nozzles specially adapted therefor: having at least three different ways
B29C 45/1735
Nozzles therefor: nozzles for introducing the fluid through the mould gate, e.g. incorporated in the injection nozzle

Family

Application61/384,984Us provisional application · filed 21 Sep 2010
Application61/391,412Us provisional application · filed 8 Oct 2010
Application61/405,949Us provisional application · filed 22 Oct 2010
Application13/238,074Parent of this continuation · filed 21 Sep 2011
Application13/910,983Parent of this continuation · filed 5 Jun 2013
US 8,469,687 B2Parent of this continuation · filed 25 Jun 2013
US 2014/0248385 A1Pre-grant publication · published 4 Sep 2014
US 8,757,998 B2Parent of this continuation
US 2012/0070532 A1Published application
US 2013/0266679 A1Published application
US 9,073,246 B2This patent

From the US filing history. Foreign family members aren’t listed.