Compound steel workpiece
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 3, 1992
Grant Date -
N/A
app pub date -
Jun 20, 1989
filing date -
Jun 20, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A compound steel workpiece and a process for its production, wherein a support jacket is provided with at least one recess, which in turn is furnished with a lining resistant to attrition and corrosion, which lining is connected to the support jacket by a metal bond. In the process, which has particular application in the production of double or multiple screw cylinders for use in plastics processing, the support jacket is provided with at least one core at the point(s) at which the recess(es) are desired, is subjected to hot-forming, along with the core(s), at an appropriate temperature, in particular for cross-sectional reduction a cross-sectional shape deviating from that of a circle is imparted to the core(s) and the recess(es) are created in the core(s).
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