Metal deforming – By extruding through orifice
Patent
1978-11-20
1980-11-04
Larson, Lowell A.
Metal deforming
By extruding through orifice
72255, 72272, B21C 3504, B21C 2700
Patent
active
042312450
ABSTRACT:
A die holder has adjacent to its front end an annular step portion comprising a steep wall and a gradual wall tapered from the steep wall to the front end, the annular step portion being adapted to provide an annular space between the step portion and an inner surface bounding a billet receiving bore in a container when the die holder is inserted in the bore. During indirect extrusion, foreign impurities such as dirt, lubricant, metal oxides, and the like deposited between the bore surface and the billet are trapped and collected in the annular space against entrainment into an extruded product being formed. An annular ring partly defining the steep wall acts as a barrier that prevents the impurities from getting therepast and minimizes skull formation on the bore surface. An annular butt formed by accumulations of the impurities in the annular space and a butt end of the billet are removed from the container by means of a shear.
REFERENCES:
patent: 2894624 (1959-07-01), Leonard
patent: 3034642 (1962-05-01), Graham
patent: 3184944 (1965-05-01), Sibler
patent: 3522721 (1970-08-01), Whiting
patent: 3630064 (1971-12-01), Mann
patent: 3695081 (1972-10-01), Gartner
patent: 3738144 (1973-06-01), Doudet
patent: 4056964 (1977-11-01), Shibasaki
patent: 4103529 (1978-08-01), Huertgen
Larson Lowell A.
Yoshida Kogyo K. K.
LandOfFree
Indirect extrusion apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Indirect extrusion apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Indirect extrusion apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1639067