Patent US3736979A successfully refreshed from Google Patents.
US3736979A
Expired / Lapsed
US
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Die for tube profiles
Assignee: Technica Guss GmbH
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Filing: 1971-01-22
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Granted: 1973-06-05
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Expires: 1991-01-22
Abstract
Abstract A die arrangement for continuous casting tube profiles having an outer cylindrical-like die portion and a mandrel spaced in the bore of the outer die portion, the mandrel is held radially in the bore by a cylindrical collar thereon at one end fitting into a surrounding cylindrical recess in the outer die portion and is held in an axial direction by a threaded portion on the same end of the mandrel threadedly received in a surrounding threaded portion of the outer die portion. There are axially extending passageways through the collar and threaded portions of the mandrel for flow of casting material to form the tube in the space between the mandrel and the surrounding outer die portion.
Inventors
- 👤 H Krall
- 👤 H Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:20
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/006; B22D11/04; B22D11/041
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
180 words
A die arrangement for tube profiles comprising an outer die portion or liner having a bore therethrough, a threaded recessed entrance end larger than said bore and a cylindrical recess adjacent the threaded recessed end having a diameter intermediate that of the bore and the threaded recessed end thereby forming a radially extending shoulder portion at the bore end of the cylindrical recess; a mandrel received in spaced relation within the bore of the liner or outer die portion and having an enlarged threaded end received within the threaded entrance end of the outer liner, a cylindrical collar portion of corresponding diameter to that of the cylindrical recess in the outer liner and received therein and axially extending apertures in the enlarged threaded end collar providing passageways for molten metal to enter to the bore of the outer die portion and about the mandrel, whereby the mandrel is held concentrically within the liner or outer die portion and in a radial direction by the cylindrical collar and the cylindrical recess and held in an axial position by said threaded portions.
Claim 2
Dependent Claim
180 words
A die arrangement for tube profiles comprising an outer die portion or liner having a bore therethrough, a threaded recessed entrance end larger than said bore and a cylindrical recess adjacent the threaded recessed end having a diameter intermediate that of the bore and the threaded recessed end thereby forming a radially extending shoulder portion at the bore end of the cylindrical recess; a mandrel received in spaced relation within the bore of the liner or outer die portion and having an enlarged threaded end received within the threaded entrance end of the outer liner, a cylindrical collar portion of corresponding diameter to that of the cylindrical recess in the outer liner and received therein and axially extending apertures in the enlarged threaded end collar providing passageways for molten metal to enter to the bore of the outer die portion and about the mandrel, whereby the mandrel is held concentrically within the liner or outer die portion and in a radial direction by the cylindrical collar and the cylindrical recess and held in an axial position by said threaded portions.
Claim 3
Dependent Claim
10 words
A die arrangement according to claim 1 fabricated from graphite.
Claim 4
Dependent Claim
37 words
A die arrangement for tube profiles according to claim 1 wherein said cylindrical collar is a separate annular member received over an adjacent cylindrical portion on the mandrel to hold the mandrel radially within the outer liner.
Claim 5
Dependent Claim
10 words
A die arrangement according to claim 3 fabricated from graphite.
References Cited (Backward Citations)
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |