Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1984-01-27
1986-09-09
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75245, 75249, 72256, 72257, 722531, 72262, 72270, 164272, 164418, 164443, 419 41, 419 67, 425 79, B22F 100
Patent
active
046107258
ABSTRACT:
A continuous extrusion machine, in which feedstock is admitted (at 50) to a peripheral groove (12) in a rotating wheel (10), is enclosed in that groove by a cooperating shoe (24), and is frictionally dragged along an arcuate passageway (48) formed by said groove and a projecting portion (30) of said shoe towards an abutment (36) carried by the shoe. The abutment tip and adjacent wheel parts disposed downstream of the abutment are cooled directly by a jet of cooling fluid issuing from a nozzle (64) carried downstream on the shoe. An annular band (FIG. 2, 74) of a good thermally-conductive metal embedded concentrically in the wheel enhances the cooling obtained. The extrusion apparatus yields a metal product (FIG. 5, 102) which is threaded through a treatment die (104) to change its cross-section, and is continuously drawn therethrough by a tensioning device (106,112) under the control of a system which (a) senses the temperature of the product (102) as it leaves the extrusion apparatus (100); (b) converts a temperature signal ( 120) so produced, in a function generator (124), into a tension reference signal (126); (c) compares with that tension reference signal a tension feedback signal (116) derived from a sensor (118) adjacent the extrusion apparatus; and (d) controls the tensioning device in accordance with the difference of the tension reference and feedback signals so as to prevent the sensed tension in the product extending between the extrusion apparatus (100) and the treatment die (104) from exceeding a safe value which is less than the yield stress tension of that product at the sensed temperature.
REFERENCES:
patent: 3911705 (1975-10-01), Voorhes
patent: 4054048 (1977-10-01), Hagerman
patent: 4055979 (1977-11-01), Hunter et al.
patent: 4101253 (1978-07-01), Etherington
patent: 4283931 (1981-08-01), Pigott et al.
patent: 4362485 (1982-12-01), Slater et al.
patent: 4419324 (1983-12-01), Childs et al.
patent: 4552520 (1985-11-01), East et al.
East John
Maxwell Ian
LandOfFree
Continuous extrusion of metals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous extrusion of metals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous extrusion of metals will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1013985