US3895899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die
Assignee: Rio Tinto Switzerland AG
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Filing: 1973-03-26
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Granted: 1975-07-22
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Expires: 1993-03-26
Abstract
Abstract An extrusion die has a working surface constituted by a portion of the die body, on which is a layer formed of diffusion products, such as nitrides or borides, of the material of the body, on which in turn is a coating consisting of a binder together with one or more metallic materials or one or more solid lubricants, or both, the die including a coolant conduit arrangement in thermal connection with the working surface.
Inventors
- 👤 Herbert Weber
- 👤 Alfred Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:35
CPC Classifications
B; B21; B21C; B21C25/00; B21C25/02; B21C25/025; B21C29/00; B21C29/04; C; C23; C23C; C23C28/00; C23C28/04; C23C28/044; C23C28/046; C23C30/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
An extrusion die having a die body, for use in the manufacture of sections of metallic materials, said body including a portion composed of a certain material defining a working surface region, said body further defining a conduit for a coolant in good thermal conductive communication with said working surface region, said working surface region comprising a layer of diffusion products of said body material and a coating disposed on said layer, said coating including an inorganic binder resistant to elevated temperatures and a solid lubricant.
Claim 2
Dependent Claim
86 words
An extrusion die having a die body, for use in the manufacture of sections of metallic materials, said body including a portion composed of a certain material defining a working surface region, said body further defining a conduit for a coolant in good thermal conductive communication with said working surface region, said working surface region comprising a layer of diffusion products of said body material and a coating disposed on said layer, said coating including an inorganic binder resistant to elevated temperatures and a solid lubricant.
Claim 3
Dependent Claim
53 words
The die as claimed in claim 1, wherein said conduit includes a channel defined in said body near said working surface region, at least one inlet means having an expansion chamber defined therein and communicating with said channel, and at least one outlet means communicating said channel with the exterior of said body.
Claim 4
Dependent Claim
38 words
The die as claimed in claim 2, wherein said working surface region has a downstream end towards which material entering said body move and said outlet means is disposed at the downstream end of said working surface region.
Claim 5
Dependent Claim
19 words
The die according to claim 1, in which the layer consists of nitrides of the material of the body.
Claim 6
Dependent Claim
19 words
The die according to claim 1, in which the layer consists of borides of the material of the body.
Claim 7
Dependent Claim
21 words
The die according to claim 1, in which the layer consists of borides and nitrides of the material of the body.
Claim 8
Dependent Claim
16 words
A die according to claim 1, in which the coating includes graphite as the solid lubricant.
Claim 9
Dependent Claim
17 words
The die according to claim 1, in which the coating includes molybdenum disulphide as the solid lubricant.
Claim 10
Dependent Claim
86 words
An extrusion die having a die body, for use in the manufacture of sections of metallic materials, said body including a portion composed of a certain material defining a working surface region, said body further defining a conduit for a coolant in good thermal conductive communication with said working surface region, said working surface region comprising a layer of diffusion products of said body material and a coating disposed on said layer, said coating including an inorganic binder resistant to elevated temperatures and solid metallic substances.
Claim 11
Dependent Claim
86 words
An extrusion die having a die body, for use in the manufacture of sections of metallic materials, said body including a portion composed of a certain material defining a working surface region, said body further defining a conduit for a coolant in good thermal conductive communication with said working surface region, said working surface region comprising a layer of diffusion products of said body material and a coating disposed on said layer, said coating including an inorganic binder resistant to elevated temperatures and solid metallic substances.
Claim 12
Dependent Claim
87 words
An extrusion die having a die body, for use in the manufacture of sections of metallic materials, said body including a portion composed of a certain material defining a working surface region, said body further defining a conduit for a coolant in good thermal conductive communication with said working surface region, said working surface region comprising a layer of diffusion products of said body material and a coating disposed on said layer, said coating including an inorganic binder resistant to elevated temperatures, metallic substances and solid lubricants.
Claim 13
Dependent Claim
87 words
An extrusion die having a die body, for use in the manufacture of sections of metallic materials, said body including a portion composed of a certain material defining a working surface region, said body further defining a conduit for a coolant in good thermal conductive communication with said working surface region, said working surface region comprising a layer of diffusion products of said body material and a coating disposed on said layer, said coating including an inorganic binder resistant to elevated temperatures, metallic substances and solid lubricants.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |