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US4143208A
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Method of producing tubes or the like and capsule for carrying out the method as well as blanks and tubes according to the method
Assignee: Granges Nyby AB
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Filing: 1976-11-22
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Granted: 1979-03-06
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Expires: 1996-11-22
Abstract
Abstract A method and a capsule and a blank for producing tubes, bars or similar profiled elongated dense metal objects, preferably in stainless steel qualities, by single or multi-stage extrusion of capsules which are filled with powder of metals or metal alloys or mixtures thereof or with mixtures of powder of metals and/or metal alloys with ceramic powder and sealed and which are adapted in their form to the desired object or intermediate product, as starting material a powder being used which consists at least predominantly of substantially spherical grains and the capsule filled with said powder and sealed being compressed by means of cold-isostatic pressure acting all round until the density of the powder reaches at least 80% of the theoretical density.
Inventors
- 👤 Christer Aslund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:33
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/1208; B22F3/02; B22F3/04; B22F3/20; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097; Y10T428/12139; Y10T428/12229; Y10T428/12389; Y10T428/12403
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
106 words
A blank for extruding an elongated dense metal object, said blank comprising a metal container having metal powder compressed therein, said metal powder comprising metal particles that are substantially spherical, and said container being formed from a ductile metal, the wall thickness of said container being at most 5% of the outer diameter of said container, said metal container and the metal powder therein having been subjected to cold-isostatic pressure acting on all surfaces of said container so that said metal container and the metal powder therein are compressed together until the density of said metal powder therein reaches at least 80% of the theoretical density.
Claim 2
Dependent Claim
106 words
A blank for extruding an elongated dense metal object, said blank comprising a metal container having metal powder compressed therein, said metal powder comprising metal particles that are substantially spherical, and said container being formed from a ductile metal, the wall thickness of said container being at most 5% of the outer diameter of said container, said metal container and the metal powder therein having been subjected to cold-isostatic pressure acting on all surfaces of said container so that said metal container and the metal powder therein are compressed together until the density of said metal powder therein reaches at least 80% of the theoretical density.
Claim 3
Dependent Claim
20 words
A blank according to claim 1, wherein the wall thickness of the container is between about 0.1 and 5 mm.
Claim 4
Dependent Claim
19 words
A blank according to claim 1, wherein the wall thickness of the container lies between 0.2 and 3 mm.
Claim 5
Dependent Claim
18 words
A blank according to claim 1, wherein the powder has a particle size of less than 1 mm.
Claim 6
Dependent Claim
18 words
A blank according to claim 1, wherein the metal powder has a particle size less than 0.6 mm.
Claim 7
Dependent Claim
24 words
A blank according to claim 1, wherein the wall thickness of said container is less than 1% of the outer diameter of said container.
Claim 8
Dependent Claim
47 words
A blank according to claim 1, wherein said container includes at least one concentric partition dividing the interior of said container into at least two regions, each of said regions being filled with metal powder having a different composition from the metal powder filling the other regions.
Claim 9
Dependent Claim
15 words
A blank according to claim 1, wherein said metal powder is formed from stainless steel.
Claim 10
Dependent Claim
135 words
A blank for extruding an elongated dense metal object which comprises a thin walled metal container filled with compressed metal powder, said metal powder having metal particles that are substantially spherical and that have a particle size of less than 1 mm, and said container being formed from a ductile metal, the wall thickness of said container being at most 5% of the outer diameter of said container; said container and the powder therein having been compressed by cold-isostatic pressure acting on all surfaces of said container until the density of the metal powder within the metal container is at least 80% of the theoretical density whereby said blank is capable of producing an elongated dense metal object that is devoid of surface flaws and that does not exhibit any creasing or wrinkling during extrusion.
Claim 11
Dependent Claim
135 words
A blank for extruding an elongated dense metal object which comprises a thin walled metal container filled with compressed metal powder, said metal powder having metal particles that are substantially spherical and that have a particle size of less than 1 mm, and said container being formed from a ductile metal, the wall thickness of said container being at most 5% of the outer diameter of said container; said container and the powder therein having been compressed by cold-isostatic pressure acting on all surfaces of said container until the density of the metal powder within the metal container is at least 80% of the theoretical density whereby said blank is capable of producing an elongated dense metal object that is devoid of surface flaws and that does not exhibit any creasing or wrinkling during extrusion.
Claim 12
Dependent Claim
114 words
In a method for producing a blank for extruding an elongated dense metal object wherein metal powder is sealed in a metal container and the metal container with the metal powder therein is compressed, the improvement wherein (1) the metal powders of said metal powder are substantially spherical, (2) said container is formed from a ductile metal, (3) the wall thickness of said container is at most 5% of the outer diameter of said container, (4) said metal container is subjected to cold-isostatic pressure acting on all surfaces of said container, and (5) said metal container is compressed until the density of the metal powder therein reaches at least 80% of the theoretical density.
Claim 13
Dependent Claim
114 words
In a method for producing a blank for extruding an elongated dense metal object wherein metal powder is sealed in a metal container and the metal container with the metal powder therein is compressed, the improvement wherein (1) the metal powders of said metal powder are substantially spherical, (2) said container is formed from a ductile metal, (3) the wall thickness of said container is at most 5% of the outer diameter of said container, (4) said metal container is subjected to cold-isostatic pressure acting on all surfaces of said container, and (5) said metal container is compressed until the density of the metal powder therein reaches at least 80% of the theoretical density.
Claim 14
Dependent Claim
20 words
A method according to claim 10, wherein the wall thickness of the container is between about 0.1 and 5 mm.
Claim 15
Dependent Claim
19 words
A method according to claim 10, wherein the wall thickness of the container lies between 0.2 and 3 mm.
Claim 16
Dependent Claim
18 words
A method according to claim 10, wherein the powder has a particle size of less than 1 mm.
Claim 17
Dependent Claim
18 words
A method according to claim 10, wherein the metal powder has a particle size less than 0.6 mm.
Claim 18
Dependent Claim
24 words
A method according to claim 10, wherein the wall thickness of said container is less than 1% of the outer diameter of said container.
Claim 19
Dependent Claim
47 words
A method according to claim 10, wherein said container includes at least one concentric partition dividing the interior of said container into at least two regions, each of said regions being filled with metal powder having a different composition from the metal powder filling the other regions.
Claim 20
Dependent Claim
57 words
A blank in accordance with claim 1, wherein the metal powder comprises: (a) one or more metals, (b) a metal alloy, (c) mixtures of alloys, (d) a mixture of metal powder and ceramic powder, (e) a mixture of metal powder, metal alloy powder and ceramic powder, or (f) a mixture of metal alloy powder and ceramic powder.
Claim 21
Dependent Claim
35 words
A blank in accordance with claim 1, wherein the container and the metal powder therein are compressed until the density of said metal powder reaches a density of about from 80-90% of the theoretical density.
Claim 22
Dependent Claim
32 words
A blank in accordance with claim 7, wherein the container and the metal powders therein are compressed until the density of said metal powder is from about 80-90% of the theoretical density.
Claim 23
Dependent Claim
57 words
A blank in accordance with claim 9, wherein the metal powder comprises: (a) one or more metals, (b) a metal alloy, (c) mixtures of alloys, (d) a mixture of metal powder and ceramic powder, (e) a mixture of metal powder, metal alloy powder and ceramic powder, or (f) a mixture of metal alloy powder and ceramic powder.
Claim 24
Dependent Claim
29 words
A blank in accordance with claim 9, wherein the metal powder in the container has a density of at least 80-90% of the theoretical density after having been compressed.
Claim 25
Dependent Claim
57 words
A method in accordance with claim 10, wherein the metal powder comprises: (a) one or more metals, (b) a metal alloy, (c) mixtures of alloys, (d) a mixture of metal powder and ceramic powder, (e) a mixture of metal powder, metal alloy powder and ceramic powder, or (f) a mixture of metal alloy powder and ceramic powder.
Claim 26
Dependent Claim
16 words
A method in accordance with claim 10, wherein the isostatic pressure is at least 1500 bars.
Claim 27
Dependent Claim
16 words
A method in accordance with claim 23, wherein the isostatic pressure is at least 5000 bars.
Claim 28
Dependent Claim
32 words
A method in accordance with claim 18, wherein the metal powder in the metal container is compressed until the density of the metal powder is about from 80-90% of the theoretical density.
Claim 29
Dependent Claim
83 words
In a method for producing a blank for extruding an elongated dense metal object in which a powder comprising: (a) one or more metals, (b) a metal alloy, (c) mixtures of alloys, (d) a mixture of metal powder and ceramic powder, (e) a mixture of metal powder, metal alloy powder and ceramic powder, or (f) a mixture of metal alloy powder and ceramic powder is sealed in a metal container, and the metal container with the powder therein is compressed, the improvements comprising:
Claim 30
Dependent Claim
83 words
In a method for producing a blank for extruding an elongated dense metal object in which a powder comprising: (a) one or more metals, (b) a metal alloy, (c) mixtures of alloys, (d) a mixture of metal powder and ceramic powder, (e) a mixture of metal powder, metal alloy powder and ceramic powder, or (f) a mixture of metal alloy powder and ceramic powder is sealed in a metal container, and the metal container with the powder therein is compressed, the improvements comprising:
Claim 31
Dependent Claim
107 words
filling a ductile metal container with a powder consisting predominantly of substantially spherical inert-atomized particles of a metal powder as defined above, the wall thickness of said container being no greater than 5% of the outer diameter of said container, 2. Vibrating said container and powder therein to increase the density of said powder to about 60-70% of the theoretical density, 3. Subjecting said filled metal container to cold-isostatic pressure acting on all surfaces of said container, and 4. Continuing to subject said metal container to cold-isostatic pressure until the density of the powder therein reaches at least 80% of the theoretical density during said compression step.
Claim 32
Dependent Claim
107 words
filling a ductile metal container with a powder consisting predominantly of substantially spherical inert-atomized particles of a metal powder as defined above, the wall thickness of said container being no greater than 5% of the outer diameter of said container, 2. Vibrating said container and powder therein to increase the density of said powder to about 60-70% of the theoretical density, 3. Subjecting said filled metal container to cold-isostatic pressure acting on all surfaces of said container, and 4. Continuing to subject said metal container to cold-isostatic pressure until the density of the powder therein reaches at least 80% of the theoretical density during said compression step.
Claim 33
Dependent Claim
22 words
A method in accordance with claim 26, wherein the filled container is subjected to a cold-isostatic pressure of at least 1500 bars.
Claim 34
Dependent Claim
22 words
A method in accordance with claim 27, wherein the filled container is subjected to a cold-isostatic pressure of at least 5000 bars.
Claim 35
Dependent Claim
21 words
A method in accordance with claim 26, wherein the wall thickness of the container is between about 0.1 and 5 mm.
Claim 36
Dependent Claim
20 words
A method in accordance with claim 26, wherein the wall thickness of the container is between 0.2 and 3 mm.
Claim 37
Dependent Claim
19 words
A method in accordance with claim 26, wherein the powder has a particle size of less than 1 mm.
Claim 38
Dependent Claim
19 words
A method in accordance with claim 26, wherein the metal powder has a particle size less than 0.6 mm.
Claim 39
Dependent Claim
25 words
A method in accordance with claim 26, wherein the wall thickness of the container is less than 1% of the outer diameter of the container.
Claim 40
Dependent Claim
23 words
A method in accordance with claim 26, wherein the cold-isostatic pressure compresses the metal powder to about from 80-90% of the theoretical density.
Claim 41
Dependent Claim
18 words
A method in accordance with claim 26, wherein the filled container is vibrated by means of ultrasonic vibration.
Claim 42
Dependent Claim
27 words
A blank in accordance with claim 1, wherein the metal powder in the container has been compacted by vibration to 60 to 70% of the theoretical density.
Claim 43
Dependent Claim
27 words
A blank in accordance with claim 7, wherein the metal powder in said regions has been compacted by vibration to 60 to 70% of the theoretical density.
Claim 44
Dependent Claim
27 words
A blank in accordance with claim 9, wherein the metal powder in the container has been compacted by vibration to 60 to 70% of the theoretical density.
Claim 45
Dependent Claim
24 words
A blank in accordance with claim 17, wherein the metal powder has been compacted by vibration to 60 to 70% of the theoretical density.
Claim 46
Dependent Claim
24 words
A blank in accordance with claim 20, wherein the metal powder has been compacted by vibration to 60 to 70% of the theoretical density.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |