Apparatus and methods for mixing and injecting a foam core...

Details Apparatus and methods for mixing and injecting a foam core... Apparatus and methods for mixing and injecting a foam core...

2005-04-19

2005-04-19

Douglas, Steven O. (Department: 3751)

Fluent material handling, with receiver or receiver coacting mea

Fluent charge impelled or fluid current conveyed into receiver

C264S045900

Reexamination Certificate

active

06880588

ABSTRACT:
An apparatus and methods for mixing and injecting a foam core within an extruded shell preferably of plastic downstream from an extrusion die to produce a uniform building product. The preferred apparatus includes a mixing head injector for mixing a binary system foam. The mixing head injector incorporates pressurized gas injection for homogenization of the foam core. A preferred method employs the mixing head injector and a novel calibrator thereby allowing injection of a foam core within the shell as it passes through a calibrator to reliably produce a uniform building product. An alternative method employs a second extruder. Alternative methods employ a mounting fixture downstream of a first calibrator.

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patent: 5965075 (1999-10-01), Pauley et al.
patent: 6083601 (2000-07-01), Prince
patent: 6592789 (2003-07-01), Barsby

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