发明名称 |
Apparatus and methods for mixing and injecting a foam core within an extruded shell |
摘要 |
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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申请公布号 |
US6592789(B2) |
申请公布日期 |
2003.07.15 |
申请号 |
US20010860939 |
申请日期 |
2001.05.18 |
申请人 |
BARSBY JAMES B. |
发明人 |
BARSBY JAMES B. |
分类号 |
B29C44/04;(IPC1-7):B29C44/20;B29C44/24 |
主分类号 |
B29C44/04 |
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