IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0410444
(2006-04-26)
|
등록번호 |
US-7278464
(2007-10-09)
|
우선권정보 |
GB-0512285.8(2005-06-16) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Knobbe Martens Olson & Bear LLP
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
4 |
초록
▼
A control pin for controlling the flow of liquid metal in a casting process includes an elongate body member, the body member being made at least partially of a composite ceramic material that includes a fibrous reinforcing material embedded within a ceramic matrix, and a failsafe element embedded w
A control pin for controlling the flow of liquid metal in a casting process includes an elongate body member, the body member being made at least partially of a composite ceramic material that includes a fibrous reinforcing material embedded within a ceramic matrix, and a failsafe element embedded within the composite ceramic material.
대표청구항
▼
The invention claimed is: 1. A control pin that controls the flow of liquid metal in a casting process, the control pin comprising an elongate body member and a wear-resistant tip at one end of the elongate body member, the body member being made at least partially of a laminated composite ceramic
The invention claimed is: 1. A control pin that controls the flow of liquid metal in a casting process, the control pin comprising an elongate body member and a wear-resistant tip at one end of the elongate body member, the body member being made at least partially of a laminated composite ceramic material that includes multiple layers of a reinforcing fabric embedded within a cast ceramic matrix, and a failsafe element embedded within the composite ceramic material. 2. A control pin according to claim 1, wherein the failsafe element extends along substantially the whole length of the elongate body member. 3. A control pin according to claim 1, wherein the failsafe element is made of a material that is resistant to high temperatures. 4. A control pin according to claim 1, wherein the failsafe element is made of a material that is resistant to oxidation. 5. A control pin according to claim 1, wherein the failsafe element is made of a metallic material. 6. A control pin according to claim 1, wherein the failsafe element comprises a metallic wire. 7. A control pin according to claim 1, wherein the failsafe element comprises a helical element. 8. A control pin according to claim 1, wherein the failsafe element comprises a mesh. 9. A control pin according to claim 1, wherein the failsafe element is embedded between layers of the reinforcing fabric. 10. A control pin according to claim 1, wherein the reinforcing fabric comprises a woven reinforcing fabric. 11. A control pin according to claim 1, wherein the reinforcing fabric is made of glass. 12. A control pin according to claim 1, wherein the matrix material is selected from the group consisting of fused silica, alumina, mullite, silicon carbide, silicon nitride, silicon aluminium oxy-nitride, zircon, magnesia, zirconia, graphite, calcium silicate, boron nitride, aluminium nitride, titanium diboride, and mixtures thereof. 13. A control pin according to claim 1, wherein the matrix material is calcium based. 14. A control pin according to claim 1, wherein the matrix material comprises calcium silicate and silica. 15. A control pin according to claim 1, wherein the matrix material comprises Wollastonite and colloidal silica. 16. A control pin according to claim 1, wherein the control pin comprises a non-stick surface coating. 17. A control pin according to claim 16, wherein the coating comprises boron nitride. 18. A control pin according to claim 1, wherein the elongate body member is substantially cylindrical. 19. A control pin according to claim 1, wherein the elongate body member is at least partially hollow. 20. A control pin according to claim 19, wherein the elongate body member comprises a circumferential wall having a wall thickness from 1-10 mm. 21. A control pin according to claim 1, wherein the wear-resistant tip is inserted at least partially into one end of the elongate body member. 22. A control pin according to claim 1, wherein the wear-resistant tip is made of a ceramic material. 23. A control pin according to claim 22, wherein the wear-resistant tip is made of a material selected from the group consisting of fused silica, alumina, mullite, silicon carbide, silicon nitride, silicon aluminium oxy-nitride, zircon, magnesia, zirconia, graphite, calcium silicate, boron nitride, aluminium titanate, aluminium nitride and titanium diboride. 24. A control pin according to claim 1, wherein the wear-resistant tip is made of a material having a density in the range 1800-3000 kg/m3. 25. A control pin according to claim 1, wherein the wear-resistant tip is made of a material having a density in the range 1900-2500 kg/m3. 26. A control pin according to claim 1, wherein the control pin has a length in the range 200-1000 mm. 27. A control pin according to claim 1, wherein the control pin has a diameter in the range 20-75 mm.
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