US 10,870,229 B2Granted

Mold stack for injection molding machine

AssigneeHusky Injection Molding Systems Ltd.

InventorArnold Heinz Mai

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Abstract

A mold stack for a mold comprises a mold core configured for reception in a mold cavity plate with an outer molding surface. The mold core comprises an inner core with a first tapered guide surface and an outer core with a second tapered guide surface. The inner core is received through a passage in the outer core. A spacer slidably supports the outer core on the inner core. The outer core is movable relative to the inner core between a molding position in which the inner and outer cores define a mold cavity with the outer molding surface, and an open position in which the outer core is extended relative to the inner core. In the molding position, the first and second tapered guide surfaces engage one another to align the inner and outer cores.

Claims20

Dependent claims

A mold stack for a mold, comprising:

a cavity assembly defining an outer molding surface;
a mold core configured for reception in said cavity assembly, said mold core comprising:
a first core member having a first inner molding surface;
a passage extending through said first core member, said passage having first tapered guide surface;
a second core member received in said passage, said second core member having a second inner molding surface and a second tapered guide surface;
a spacer slidably supporting said first core member on said second core member;
said first core member movable relative to said second core member, between a molding position in which said first and second inner molding surfaces cooperate with said outer molding surface to define a mold cavity, and an open position in which said first core member is extended relative to said second core member, wherein said first and second tapered guide surfaces engage one another to align said first and second core members in said molding position.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/737,366Filed 1 Jun 2016 · us provisional application
Priority: 8 Jul 2015
Published: US 2018/0162031 A114 Jun 2018
Granted: 22 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B29C 45/4421
For undercut articles: using expansible or collapsible cores
B29C 45/2614
Having tubular mould cavities: for manufacturing bent tubular articles using an undercut forming mould core
B29C 45/36
Moulds: having means for locating or centering cores
B29C 45/40
Component parts, details or accessories; Auxiliary operations: removing or ejecting moulded articles

Family

Application62/189,802Us provisional application · filed 8 Jul 2015
US 2018/0162031 A1Pre-grant publication · published 14 Jun 2018
US 10,870,229 B2This patent

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

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