US4703789A
Expired / Lapsed
US
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Controlling mold oscillations
Assignee: Vodafone GmbH
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Filing: 1986-12-08
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Granted: 1987-11-03
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Expires: 2006-12-08
Abstract
Abstract Apparatus for controlling the oscillations of a mold for continuous casting of metal, the mold being mounted on a table which is connected, in turn, to three spaced apart drives and three load relief springs; three displacement path transducers track each of the drives; a source of reference signals provides reference signals representing the desired oscillation, as to contour, amplitude and rate; actual and reference signals are compared by and in stages which provide correction signals for the drives.
Inventors
- 👤 Wolfgang Reichelt
- 👤 Peter Voss-Spilker
- 👤 Ewald Feuerstacke
- 👤 Klaus Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:51
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/04; B22D11/053
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
Apparatus for controlling the oscillations of a mold for continous casting of metal comprising: a continuous casting mold; at least three spaced apart drives connected to said mold; at least three displacement path transducers for tracking displacements as respectively provided by each of the drives; a source of reference signals separately providing reference signals representing a desired oscillation, including displacement, amplitude and the oscillation rate; a plurality of comparing means connected respectively to the transducers and further connected to the source for reference signals, for providing correction signals; a plurality of power means respectively connected to the drives and to the comparing means for controlling a point of reversal of the drives and their speeds; and load relief springs acting in direction opposing friction between the mold and an emerging casting.
Claim 2
Dependent Claim
131 words
Apparatus for controlling the oscillations of a mold for continous casting of metal comprising: a continuous casting mold; at least three spaced apart drives connected to said mold; at least three displacement path transducers for tracking displacements as respectively provided by each of the drives; a source of reference signals separately providing reference signals representing a desired oscillation, including displacement, amplitude and the oscillation rate; a plurality of comparing means connected respectively to the transducers and further connected to the source for reference signals, for providing correction signals; a plurality of power means respectively connected to the drives and to the comparing means for controlling a point of reversal of the drives and their speeds; and load relief springs acting in direction opposing friction between the mold and an emerging casting.
Claim 3
Dependent Claim
17 words
Apparatus as in claim 1, said drives being hydraulic drives and said power means being servo values.
Claim 4
Dependent Claim
37 words
Apparatus as in claim 1, said mold being mounted on a table, the drives acting on different parts of the table, there being guide means for ensuring movement of the table parallel to the axis of casting.
Claim 5
Dependent Claim
32 words
Apparatus as in claim 3, said load relief springs acting on the table in a pattern that is symmetrical with respect to a pattern in which the drives act on the table.
Claim 6
Dependent Claim
32 words
Apparatus as in claim 4 wherein said springs have different characteristics so that in the case of curved casting springs on the inside of such curvature are stiffer than on the outside.
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) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |