Extruder housing for double-screw extruder having an annularly stepped internal bore covered by a hot isostatically-pressed structure, and method of making same
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United States of America Patent
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-
Oct 4, 1994
Grant Date -
N/A
app pub date -
Oct 27, 1992
filing date -
Oct 27, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An extruder housing is formed for a double-worm or double-screw extruder by providing a steel body with a seamless one-piece structure and hot-isostatically pressing the body and the powder-metallurgical wear-resistant material lining the preferably conical bores of the housing to form a wear-resistant layer which is bonded to the steel body by a diffusion layer.
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Cited Art Landscape
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