US4054048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary metal extrusion apparatus
Assignee: Reynolds Metals Co
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Filing: 1976-09-24
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Granted: 1977-10-18
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Expires: 1996-09-24
Abstract
Abstract A rotary metal extrusion apparatus comprises a rotatable drum having a circumferential groove around its outer edge. A shoe, fixed relative to the drum, projects into the groove to form an elongated passageway having one end blocked by an abutment mounted in fixed relation to the shoe. The abutment has an extrusion orifice or die therein or adjacent thereto. The extrusion material is fed into the other end of the passageway and is drawn toward the die and abutment by frictional forces of the drum's groove. The pressure on the extrusion material causes its yield point to be exceeded so that the material is extruded through the die orifice. The portion of the shoe which is in sliding contact with the drum comprises a bearing material to allow sliding contact with the drum surface and reduction of flash through the space between the shoe and the drum.
Inventors
- 👤 Kenneth C. Hagerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:41
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/005
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
292 words
A method of extruding metal by operating rotary metal extrusion apparatus comprising a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein, a curved shoe located adjacent said peripheral surface of said drum, said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove, said shoe also having shoulder portions adjacent said projecting portion, said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto, the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween, an abutment member fixed with respect to said shoe and closing one end of said passageway, and a die located at said closed end of said passageway, said method comprising the steps of: introducing, into said circumferential groove in said drum, metal to be extruded; rotating said drum and thereby moving it with respect to said shoe so that frictional drag of the surfaces of said groove draws said metal through said passageway and toward said die; extruding metal through an orifice in said die to produce an extrusion; allowing a small quantity of the metal in said groove to flow through said clearance spaces as metal is extruded through said die orifice; and permitting a part of said metal flowed through said clearance spaces to be forced between said shoulder portions of said shoe and said peripheral surfaces of said drum mating therewith, so as to form therebetween a thin bearing layer of the metal; said bearing layer of the metal to be extruded being in sliding contact with a bearing material different from the materials of said shoe and said drum.
Claim 2
Independent Claim
292 words
A method of extruding metal by operating rotary metal extrusion apparatus comprising a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein, a curved shoe located adjacent said peripheral surface of said drum, said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove, said shoe also having shoulder portions adjacent said projecting portion, said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto, the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween, an abutment member fixed with respect to said shoe and closing one end of said passageway, and a die located at said closed end of said passageway, said method comprising the steps of: introducing, into said circumferential groove in said drum, metal to be extruded; rotating said drum and thereby moving it with respect to said shoe so that frictional drag of the surfaces of said groove draws said metal through said passageway and toward said die; extruding metal through an orifice in said die to produce an extrusion; allowing a small quantity of the metal in said groove to flow through said clearance spaces as metal is extruded through said die orifice; and permitting a part of said metal flowed through said clearance spaces to be forced between said shoulder portions of said shoe and said peripheral surfaces of said drum mating therewith, so as to form therebetween a thin bearing layer of the metal; said bearing layer of the metal to be extruded being in sliding contact with a bearing material different from the materials of said shoe and said drum.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the thickness of said bearing layer thereof is less than 0.030 inch.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the thickness of said bearing layer thereof is from about 0.005 inch to about 0.030 inch.
Claim 5
Dependent Claim
17 words
The method of claim 3 wherein said drum is comprised of steel and said metal is aluminum.
Claim 6
Dependent Claim
29 words
The method of claim 1 wherein said groove has a generally rectangular cross section and said metal to be extruded is in the form of a solid aluminum bar.
Claim 7
Dependent Claim
27 words
The method of claim 1 wherein each said clearance space between said projecting portion and a side of said groove is between 0.002 inch and 0.006 inch.
Claim 8
Dependent Claim
32 words
The method of claim 6 wherein the ratio of the depth to which said projecting portion projects into said groove to each said clearance space is from about 50 to about 149.
Claim 9
Independent Claim
282 words
A method of extruding metal by operating rotary metal extrusion apparatus comprising a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein, a curved shoe located adjacent said peripheral surface of said drum, said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove, said shoe also having shoulder portions adjacent said projecting portion, said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto, the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween, an abutment member fixed with respect to said shoe and closing one end of said passageway, and a die located at said closed end of said passageway, said method comprising the steps of: introducing, into said circumferential groove in said drum, metal to be extruded; rotating said drum and thereby moving it with respect to said shoe so that frictional drag of the surfaces of said groove draws said metal through said passageway and toward said die; extruding metal through an orifice in said die to produce an extrusion; allowing a small quantity of the metal in said groove to flow through said clearance spaces as metal is extruded through said die orifice; and permitting a part of said metal flowed through said clearance spaces to be forced between said shoulder portions of said shoe and said peripheral surfaces of said drum mating therewith, so as to form therebetween a thin bearing layer of the metal; said shoulder portions including a different bearing material that is in contact with said thin bearing layer.
Claim 10
Independent Claim
282 words
A method of extruding metal by operating rotary metal extrusion apparatus comprising a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein, a curved shoe located adjacent said peripheral surface of said drum, said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove, said shoe also having shoulder portions adjacent said projecting portion, said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto, the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween, an abutment member fixed with respect to said shoe and closing one end of said passageway, and a die located at said closed end of said passageway, said method comprising the steps of: introducing, into said circumferential groove in said drum, metal to be extruded; rotating said drum and thereby moving it with respect to said shoe so that frictional drag of the surfaces of said groove draws said metal through said passageway and toward said die; extruding metal through an orifice in said die to produce an extrusion; allowing a small quantity of the metal in said groove to flow through said clearance spaces as metal is extruded through said die orifice; and permitting a part of said metal flowed through said clearance spaces to be forced between said shoulder portions of said shoe and said peripheral surfaces of said drum mating therewith, so as to form therebetween a thin bearing layer of the metal; said shoulder portions including a different bearing material that is in contact with said thin bearing layer.
Claim 11
Dependent Claim
27 words
The method of claim 8 wherein the metal is aluminum, and the thickness of said bearing layer thereof is from about 0.005 inch to about 0.030 inch.
Claim 12
Dependent Claim
18 words
The method of claim 9 wherein said bearing material in said shoulder portions is a silicon bronze alloy.
Claim 13
Dependent Claim
256 words
Rotary metal extrusion apparatus comprising: a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein; a curved shoe located adjacent said peripheral surface of said drum; said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove; said shoe also having shoulder portions adjacent said projecting portion; said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto; the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween; an abutment member fixed with respect to said shoe and closing one end of said passageway; a die located at said closed end of said passageway; a bearing material disposed between the shoulder portions of the shoe and said peripheral surfaces of said drum adjacent said groove, said bearing material being different from the materials of said shoe and said drum and different from the metal to be extruded, and means for moving said drum relative to said shoe so that frictional drag of the surfaces of said groove draws metal in said groove toward said die for extrusion through an orifice in said die; said clearance spaces providing a passage for a small quantity of said metal to flow therethrough so that a portion of said metal passes between said mating surfaces of said drum and said shoulders of said shoe to form a bearing layer thereof in contact with said bearing material.
Claim 14
Dependent Claim
256 words
Rotary metal extrusion apparatus comprising: a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein; a curved shoe located adjacent said peripheral surface of said drum; said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove; said shoe also having shoulder portions adjacent said projecting portion; said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto; the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween; an abutment member fixed with respect to said shoe and closing one end of said passageway; a die located at said closed end of said passageway; a bearing material disposed between the shoulder portions of the shoe and said peripheral surfaces of said drum adjacent said groove, said bearing material being different from the materials of said shoe and said drum and different from the metal to be extruded, and means for moving said drum relative to said shoe so that frictional drag of the surfaces of said groove draws metal in said groove toward said die for extrusion through an orifice in said die; said clearance spaces providing a passage for a small quantity of said metal to flow therethrough so that a portion of said metal passes between said mating surfaces of said drum and said shoulders of said shoe to form a bearing layer thereof in contact with said bearing material.
Claim 15
Dependent Claim
14 words
The apparatus of claim 11 wherein said bearing material is a silicon bronze alloy.
Claim 16
Dependent Claim
46 words
The apparatus of claim 11 wherein said bearing material is a silicon bronze alloy consisting essentially about 3.1 parts by weight silicon, about 1.1 parts by weight manganese, about 1.0 parts by weight zinc, and from about 94.3 parts to about 94.8 parts by weight copper.
Claim 17
Dependent Claim
230 words
Rotary metal extrusion apparatus comprising: a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein; a curved shoe located adjacent said peripheral surface of said drum; said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove; said shoe also having shoulder portions adjacent said projecting portion; said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto; said shoulder portions comprising a bearing material that is different from said drum and said shoe; the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween; an abutment member fixed with respect to said shoe and closing one end of said passageway; a die located at said closed end of said passageway; and means for moving said drum relative to said shoe so that frictional drag of the surfaces of said groove draws metal in said groove toward said die for extrusion through an orifice in said die; said clearance spaces providing a passage for a small quantity of said metal to flow therethrough so that a portion of said metal passes between said mating surfaces of said drum and said shoulders of said shoe to form a layer of bearing material on at least said drum surfaces.
Claim 18
Dependent Claim
230 words
Rotary metal extrusion apparatus comprising: a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein; a curved shoe located adjacent said peripheral surface of said drum; said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove; said shoe also having shoulder portions adjacent said projecting portion; said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto; said shoulder portions comprising a bearing material that is different from said drum and said shoe; the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween; an abutment member fixed with respect to said shoe and closing one end of said passageway; a die located at said closed end of said passageway; and means for moving said drum relative to said shoe so that frictional drag of the surfaces of said groove draws metal in said groove toward said die for extrusion through an orifice in said die; said clearance spaces providing a passage for a small quantity of said metal to flow therethrough so that a portion of said metal passes between said mating surfaces of said drum and said shoulders of said shoe to form a layer of bearing material on at least said drum surfaces.
Claim 19
Dependent Claim
14 words
The apparatus of claim 14 wherein said bearing material is a silicon bronze alloy.
Claim 20
Dependent Claim
46 words
The apparatus of claim 14 wherein said bearing material is a silicon bronze alloy consisting essentially about 3.1 parts by weight silicon, about 1.1 parts by weight managanese, about 1.0 parts by weight zinc, and from about 94.3 parts to about 94.8 parts by weight copper.
Claim 21
Dependent Claim
32 words
The apparatus of claim 11 including an aperture extending from said passageway to a point outside said apparatus to provide for relief of pressure in the event said extrusion die becomes obstructed.
Claim 22
Dependent Claim
36 words
The apparatus of claim 11 wherein the drum is substantially cylindrical and said die is located in said abutment member so that the extruded metal leaves said die in a direction substantially tangential to said drum.
Claim 23
Dependent Claim
47 words
The apparatus of claim 11 wherein the drum is substantially cylindrical and said die is located so that the extruded metal leaves said die in a direction substantially perpendicular to the direction of travel of the metal as it is moved through said passageway near said die.
Claim 24
Dependent Claim
19 words
The apparatus of claim 11 wherein each said clearance space is from about 0.002 inch to about 0.006 inch.
Claim 25
Dependent Claim
32 words
The apparatus of claim 20 wherein the ratio of the depth to which said projecting portion projects into said groove to each said clearance space is from about 50 to about 149.
Claim 26
Dependent Claim
248 words
Rotary metal extrusion apparatus comprising: a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein; a curved shoe located adjacent said peripheral surface of said drum; said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove; said shoe also having shoulder portions adjacent said projecting portion; said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto; the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween; an abutment member fixed with respect to said shoe and closing one end of said passageway; a die located at said closed end of said passageway; and means for moving said drum relative to said shoe so that frictional drag of the surfaces of said groove draws metal in said groove toward said die for extrusion through an orifice in said die; said clearance spaces providing a passage for a small quantity of said metal to flow therethrough so that a portion of said metal passes between said mating surfaces of said drum and said shoulders of said shoe to form a layer of bearing material on at least said drum surfaces, and the depth of said circumferential groove being uniform about its entire circumference and the depth to which said projecting portion of said shoe projects into said groove decreasing with distance from said die.
Claim 27
Dependent Claim
248 words
Rotary metal extrusion apparatus comprising: a drum rotatable about an axis and having a curved peripheral surface with a circumferential groove therein; a curved shoe located adjacent said peripheral surface of said drum; said shoe having a projecting portion projecting into said groove to form a passageway with the surfaces of said groove; said shoe also having shoulder portions adjacent said projecting portion; said shoulder portions mating with the peripheral surfaces of said drum adjacent said groove for relative movement with respect thereto; the sides of said projecting portion of said shoe and the sides of said groove having clearance spaces therebetween; an abutment member fixed with respect to said shoe and closing one end of said passageway; a die located at said closed end of said passageway; and means for moving said drum relative to said shoe so that frictional drag of the surfaces of said groove draws metal in said groove toward said die for extrusion through an orifice in said die; said clearance spaces providing a passage for a small quantity of said metal to flow therethrough so that a portion of said metal passes between said mating surfaces of said drum and said shoulders of said shoe to form a layer of bearing material on at least said drum surfaces, and the depth of said circumferential groove being uniform about its entire circumference and the depth to which said projecting portion of said shoe projects into said groove decreasing with distance from said die.
Claim 28
Dependent Claim
14 words
The apparatus of claim 11 wherein said groove has a generally rectangular cross section.
Claim 29
Dependent Claim
22 words
The method of claim 1 wherein said peripheral surfaces of the drum with which said shoulder portions mate include said bearing material.
Claim 30
Dependent Claim
22 words
The apparatus of claim 12 wherein said peripheral surfaces of the drum with which said shoulder portions mate comprise said bearing material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |