US4787228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making molds with rectangular or square-shaped cross section
Assignee: KM Kabelmetal AG
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Filing: 1983-05-12
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Granted: 1988-11-29
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Expires: 2003-05-12
Abstract
Abstract A round copper or copper-alloy tube is internally coated with a relatively thick nickel or nickel-alloy layer and formed into a tube of rectangular or square-shaped cross section; the tube or cut-off sections thereof will serve as molds for continuous casting.
Inventors
- 👤 Eike Weisner
- 👤 Horst Gravemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:30
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/04; B22D11/059; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A method for making a tubular mold having rectangular or square shaped cross section to be used for continuous casting of high melting metals such as steel comprising the steps of: providing a round tube made of copper or a copper alloy by means of press working and/or rolling and/or drawing; electrolytically depositing a wear resisting coating on the inside surface of the round tube as made to produce a compound tube having a wear resisting uniform coating on the inside; and subsequently forming the round tube into a tube with rectangular or square-shaped cross section.
Claim 2
Independent Claim
96 words
A method for making a tubular mold having rectangular or square shaped cross section to be used for continuous casting of high melting metals such as steel comprising the steps of: providing a round tube made of copper or a copper alloy by means of press working and/or rolling and/or drawing; electrolytically depositing a wear resisting coating on the inside surface of the round tube as made to produce a compound tube having a wear resisting uniform coating on the inside; and subsequently forming the round tube into a tube with rectangular or square-shaped cross section.
Claim 3
Dependent Claim
22 words
A method as in claim 1 wherein said electrolytically depositing step is continued until coating of at least 150 micrometers is obtained.
Claim 4
Dependent Claim
31 words
A method as in claim 1 wherein said forming step includes insertion of mandrel having rectangular or square shaped cross section and drawing the compound tube through a correspondingly contoured die.
Claim 5
Dependent Claim
26 words
A method as in claim 3 and including the additional step after said forming step by means of drawing, of sizing the tube through explosion forming.
Claim 6
Dependent Claim
37 words
A method as in claim 3 and including the subsequent step of inserting a curved mandrel with a rectangular or square shaped cross section into the tube and forcing the tube and mandrel together through a die.
Claim 7
Dependent Claim
42 words
A method as in claim 1 wherein said copper tubing has considerably thicker wall thickness and/or is longer than the mold to be made, and including the additional step of cutting said rectangular or square shaped tube into sections of desired length.
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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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |