Patent US4510191A successfully refreshed from Google Patents.
US4510191A
Expired / Lapsed
US
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Casting nozzle
Assignee: Coorstek KK
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Filing: 1982-09-30
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Granted: 1985-04-09
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Expires: 2002-09-30
Abstract
Abstract A casting nozzle for molten steel with improved spalling resistance and corrosion resistance is prepared by kneading a raw material consisting of 42 to 93% by weight of an alumina simple substance powder, 4 to 44% of a graphite simple substance powder and 10 to 27% by weight of a fused silica simple substance powder after adding a binder thereto, pelletizing the resultant mixture, pressing the pellets with a rubber press, and sintering the pressed nozzle at a low temperature within a range such that the resultant nozzle may have the characteristics attributable to the addition of alumina, graphite and fused silica.
Inventors
- 👤 Toshiro Kagami
- 👤 Kuniaki Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:01
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/50; B22D41/52; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
A casting nozzle prepared by kneading a raw material consisting of 42 to 86% by weight of an alumina powder, 4 to 44% by weight of a graphite powder and 10 to 27% by weight of a fused silica powder after addition of a binder to said powder components; pelletizing the resultant mixture; rubber pressing the resultant pellets and releasing a pressed casting nozzle from said rubber press; and sintering the pressed casting nozzle at 800° to 1,100° C. after drying.
Claim 2
Dependent Claim
81 words
A casting nozzle prepared by kneading a raw material consisting of 42 to 86% by weight of an alumina powder, 4 to 44% by weight of a graphite powder and 10 to 27% by weight of a fused silica powder after addition of a binder to said powder components; pelletizing the resultant mixture; rubber pressing the resultant pellets and releasing a pressed casting nozzle from said rubber press; and sintering the pressed casting nozzle at 800° to 1,100° C. after drying.
Claim 3
Dependent Claim
14 words
The casting nozzle according to claim 1, wherein the binder is a phenol resin.
Claim 4
Dependent Claim
13 words
The casting nozzle according to claim 1, wherein the binder is tar pitch.
Claim 5
Dependent Claim
13 words
The casting nozzle according to claim 1, wherein the binder is polyvinyl alcohol.
Claim 6
Dependent Claim
20 words
The casting nozzle according to claim 1, wherein a mean size of the pellets is not more than 1 mm.
Claim 7
Dependent Claim
16 words
The casting nozzle according to claim 1, wherein a sintering temperature is 900° to 1,100° C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |