US3971429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of extracting a hot slab from a continuous casting mould and an apparatus therefor
Assignee: Voestalpine AG
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Filing: 1975-07-31
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Granted: 1976-07-27
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Expires: 1995-07-31
Abstract
Abstract A process and an apparatus for extracting a hot strand from a continuous casting mould uses a tong-shaped starter bar head inserted into the lower opening of the mould which defines an upwardly open cavity filled with molten metal which is to solidify therein. The starter bar head is extracted and the nippers of the tongs are opened to detach themselves from the cast connection piece which is integral with the strand. Preferably the bit of the tongs is pretreated with a graphite size before the starter bar head is introduced into the mould.
Inventors
- 👤 Mathias Horeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:06
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/08; B22D11/081; B22D11/083
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A process of extracting a hot slab from a continuous casting mould with a lower opening by means of a tong-shaped starter bar head connected to a starter bar, comprising the steps of: inserting the tong-shaped starter bar head having nippers forming a bit into the lower opening of said mould and thereby closing it, filling the bit formed between said nippers in closed position with molten metal and allowing the molten metal to solidify, thus forming a cast connection piece, subsequently extracting said starter bar head, and opening the nippers of the tong-shaped starter bar head in a controlled manner so as to detach said nippers from said cast connection piece.
Claim 2
Dependent Claim
112 words
A process of extracting a hot slab from a continuous casting mould with a lower opening by means of a tong-shaped starter bar head connected to a starter bar, comprising the steps of: inserting the tong-shaped starter bar head having nippers forming a bit into the lower opening of said mould and thereby closing it, filling the bit formed between said nippers in closed position with molten metal and allowing the molten metal to solidify, thus forming a cast connection piece, subsequently extracting said starter bar head, and opening the nippers of the tong-shaped starter bar head in a controlled manner so as to detach said nippers from said cast connection piece.
Claim 3
Dependent Claim
17 words
A process as set forth in claim 1, wherein the starter bar is an articulated starter bar.
Claim 4
Dependent Claim
34 words
A process as set forth in claim 1, wherein the bit of said tong-shaped starter bar head is pre-treated with a graphite size before it is inserted into the lower opening of said mould.
Claim 5
Independent Claim
110 words
An apparatus for extracting a hot strand from a continuous casting mould comprising: a starter bar, a tong-shaped starter bar head dimensioned to fill the mould cross-section when inserted therein, said tong-shaped starter bar head being composed of tong-nippers defining an upwardly open cavity in their closed position and of tong-legs, a shear-like linkage connected to the tong-legs, two connecting brackets pivotable to and from the axis of the strand and connecting the shear-like linkage with the starter bar, and arcuately extending rails forming forced guide means connected with the connecting brackets for producing straddling and closing movements of the connecting brackets and for an analogous movement of the tong-nippers.
Claim 6
Independent Claim
110 words
An apparatus for extracting a hot strand from a continuous casting mould comprising: a starter bar, a tong-shaped starter bar head dimensioned to fill the mould cross-section when inserted therein, said tong-shaped starter bar head being composed of tong-nippers defining an upwardly open cavity in their closed position and of tong-legs, a shear-like linkage connected to the tong-legs, two connecting brackets pivotable to and from the axis of the strand and connecting the shear-like linkage with the starter bar, and arcuately extending rails forming forced guide means connected with the connecting brackets for producing straddling and closing movements of the connecting brackets and for an analogous movement of the tong-nippers.
Claim 7
Dependent Claim
17 words
An apparatus as set forth in claim 4, wherein said starter bar is an articulated starter bar.
Claim 8
Dependent Claim
30 words
An apparatus as set forth in claim 4, further comprising U-section-shaped recesses in said arcuately extending rails, and uncoupling pins provided on said connecting brackets engaging in said U-section-shaped recesses.
References Cited (Backward Citations)
GB945970A
Cited
US3610321A
Cited
US3717198A
Cited
US3814169A
Cited
US3774671A
Cited
US3861451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |