Patent US3630064A successfully refreshed from Google Patents.
US3630064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexing die member for indirect extrusion
Assignee: Alcoa Corp
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Filing: 1969-10-20
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Granted: 1971-12-28
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Expires: 1989-10-20
Abstract
Abstract An extrusion process and apparatus in which a die member is provided with an annular recess in the periphery thereof. The recess permits radial expansion of the front portion thereof when the member and extrusion material are forced together under extrusion pressure, and radial contraction when the extrusion pressure is terminated.
Inventors
- 👤 Maurice W Mahns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:06
CPC Classifications
B; B21; B21C; B21C26/00; B21C25/00; B21C25/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
174 words
Apparatus for extruding a material confined in a container, said apparatus comprising a container, a hollow ram, and a die member attached to one end of said ram, and disposed for relative movement with and in said container to engage the material confined therein, said die member having an annular recess provided in the periphery thereof, and an outer diameter less than the internal diameter of said container so that a relatively small annular clearance space is formed between the periphery of said member and the interior of said container, said annular recess providing in said die member a mechanical couple when the member and the material in the container are forced together under extrusion pressure, said couple permitting elastic radial expansion of the portion of said die member in engagement with the material, said radial expansion being effective to reduce said clearance space when said member and the material in said container are forced together under extrusion pressure, and to permit elastic radial contraction of the die member when extrusion pressure is terminated.
Claim 2
Dependent Claim
174 words
Apparatus for extruding a material confined in a container, said apparatus comprising a container, a hollow ram, and a die member attached to one end of said ram, and disposed for relative movement with and in said container to engage the material confined therein, said die member having an annular recess provided in the periphery thereof, and an outer diameter less than the internal diameter of said container so that a relatively small annular clearance space is formed between the periphery of said member and the interior of said container, said annular recess providing in said die member a mechanical couple when the member and the material in the container are forced together under extrusion pressure, said couple permitting elastic radial expansion of the portion of said die member in engagement with the material, said radial expansion being effective to reduce said clearance space when said member and the material in said container are forced together under extrusion pressure, and to permit elastic radial contraction of the die member when extrusion pressure is terminated.
Claim 3
Dependent Claim
95 words
The structure described in claim 1 in which the die member comprises a die holder and a die insert centrally supported in said holder, means associated with said die insert extending beyond the plane of the rear face of said holder, and disposed in abutting engagement with the hollow ram, and said die holder and said die insert having annular beveled surfaces disposed in mating engagement, said die insert serving to effect the radial expansion of said die holder when the die member and the material in the container are forced together under extrusion pressure.
Claim 4
Independent Claim
134 words
A method of extruding a material confined in an extrusion container with a die member having an annular recess in the periphery thereof, and an outer diameter less than the inner diameter of said container so that a relatively small annular clearance space is provided between said member and said container, the method comprising the steps of effecting relative movement of said die member in and relative to said container and against said material to extrude the same through an opening in said die member, said member radially expanding under extrusion pressure to reduce said clearance space while simultaneously permitting air within said container to escape therefrom, and withdrawing said die member through said container after the extrusion of said material is completed, said member having radially contracted therebefore when extrusion pressure is terminated.
Claim 5
Independent Claim
134 words
A method of extruding a material confined in an extrusion container with a die member having an annular recess in the periphery thereof, and an outer diameter less than the inner diameter of said container so that a relatively small annular clearance space is provided between said member and said container, the method comprising the steps of effecting relative movement of said die member in and relative to said container and against said material to extrude the same through an opening in said die member, said member radially expanding under extrusion pressure to reduce said clearance space while simultaneously permitting air within said container to escape therefrom, and withdrawing said die member through said container after the extrusion of said material is completed, said member having radially contracted therebefore when extrusion pressure is terminated.
Claim 6
Dependent Claim
41 words
The method described in claim 3 in which the radial expansion of the die member is effected by establishing a couple between front and rear portions thereof when the die member moves against the material in the container under extrusion pressure.
Claim 7
Dependent Claim
44 words
The method described in claim 3 in which the radial expansion of the die member is effected by axially moving a die insert into a die holder along mutually engaged beveled surfaces respectively provided on and between said die insert and said die holder.
Claim 8
Dependent Claim
98 words
A die member for use in extrusion apparatus, said member having means for engagement with one end of a hollow extrusion ram, and adapted for relative movement with and in a container for receiving and confining a material to be extruded, said die member having an annular recess in the periphery thereof of such a dimension and depth that a mechanical couple is established in the die member allowing the member to flex elastically in a radially outwardly direction when The member and a material to be extruded are forced together under extruding pressure in an extrusion process.
Claim 9
Dependent Claim
98 words
A die member for use in extrusion apparatus, said member having means for engagement with one end of a hollow extrusion ram, and adapted for relative movement with and in a container for receiving and confining a material to be extruded, said die member having an annular recess in the periphery thereof of such a dimension and depth that a mechanical couple is established in the die member allowing the member to flex elastically in a radially outwardly direction when The member and a material to be extruded are forced together under extruding pressure in an extrusion process.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |