Externally adjustable insert for extrusion manifold

Details Externally adjustable insert for extrusion manifold Externally adjustable insert for extrusion manifold

2007-09-04

2007-09-04

Heitbrink, Tim (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

Including auxiliary shaping means associated with molding...

C425S190000, C425S311000, C425S313000, C425S466000

Reexamination Certificate

active

11250874

ABSTRACT:
Externally adjustable extrusion insert for a multiple-orifice extrusion manifold. Adjustments to an extrusion insert precisely controls the extrusion path leading to one or more extrusion orifices of the manifold. Each insert is adjusted to reduce or eliminate variations in extrudate exit velocity among orifices in the extrusion manifold. Precisely tuned inserts provide extruded products of uniform length. Choke plates controlling the flow of extrudate to each orifice. Choke plates are manipulated with an externally adjustable cam. Such adjustment compensates for variations in temperature, pressure, surface properties, geometric variations, and other conditions which may affect extrudate flow rates through the orifices and extrusion manifold.

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patent: WO 95/16553 (1995-07-01), None
patent: WO 99/44806 (1999-09-01), None

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