Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Reexamination Certificate
2005-01-04
2005-01-04
Lechert, Jr., Stephen J. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
C264S176100, C264S211210, C264S211230
Reexamination Certificate
active
06838025
ABSTRACT:
The invention relates to a method for adjusting an extrusion die in an extruder by recording at least one master flow curve (40, 41) in a first extruder to which the extrusion die is optimized, in which curve the volume flow is entered over the pressure, which master flow curve (40, 41) is obtained in a measuring channel (20) which branches off in the extruder, the extrusion die or in any interposed adapter part from the flow channel (4), and the repeated recording of flow curves (30, 31) in the same or similar measuring channels (20) as in the first extruder after the assembly of the extrusion tool in the extruder to be checked and adjusted, and the purposeful change of process parameters for such a time until the flow curves (30, 31) correspond to the master flow curves (40, 41) within predetermined tolerance ranges.
REFERENCES:
patent: 4093692 (1978-06-01), Hill
patent: 4425790 (1984-01-01), Bice et al.
patent: 6561011 (2003-05-01), Collin et al.
patent: 3642757 (1987-07-01), None
patent: 00899556 (1999-03-01), None
Dorninger Frank
Fattmann Gordon
Krüll Oliver
Limper Andreas
Schwaiger Meinhard
Dykema Gossett PLLC
Lechert Jr. Stephen J.
Technoplast Kunststofftechnik GmbH
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