Patent ID: 7775788
Filing Date: 2010-08-17
Classification: B29C

Abstract:
1. A stack molding apparatus comprising: a first mold platen and a second mold platen defining a parting line there between; a first melt transfer component having a first sealing surface and a first spigot portion, the first melt transfer component being fixedly attached to the first mold platen such that the first sealing surface defines a portion of the parting line; a second melt transfer component having a second sealing surface and a second spigot portion, the second melt transfer component being fixedly attached to the second mold platen such that the second sealing surface defines a portion of the parting line; a first melt transfer nozzle extending within the first mold platen, the first melt transfer nozzle defining a first melt channel there through for transporting a melt stream from a melt source, wherein the first spigot portion of the first melt transfer component is slidably fit within a downstream end of the first melt channel; and a second melt transfer nozzle extending within the second mold platen, the second melt transfer nozzle defining a second melt channel there through for receiving the melt stream from the first melt transfer nozzle, wherein the second spigot portion of the second melt transfer component is slidably fit within an upstream end of the second melt channel, wherein as the stack molding apparatus is brought to an operating temperature the first and second melt transfer nozzles slide over the first and second spigot portions, respectively, to accommodate thermal expansion.