Teeming pipe for use at the outlet of a melt container

Claim 2

A refractory teeming pipe for use at the outlet of a melt container used in a teeming or casting operation, said teeming pipe comprising: a refractory inner pipe member adapted to be connected to the outlet of a melt container; a refractory outer pipe member telescopically slidably mounted about said inner pipe member for axial movement relative thereto between an upper retracted position and a lower extended position, said outer pipe member surrounding said inner pipe member with a narrow annular gap therebetween; and an upper refractory seal supported by said outer pipe member adjacent the end thereof closest to the melt container, said upper refractory seal closing one end of said annular gap.

Claim 3

A teeming pipe as claimed in claim 1, wherein said inner and outer pipe members include respective outer metal jackets.

Claim 4

A teeming pipe as claimed in claim 1, further comprising an additional refractory seal supported by said outer pipe member at a position spaced from said upper refractory seal, said additional refractory seal defining with said upper refractory seal an annular space.

Claim 5

A teemping pipe as claimed in claim 3, wherein said additional refractory seal is permeable to gas, and further comprising means for supplying a gas to said annular space between said refractory seals.

Claim 6

A teeming pipe as claimed in claim 1, wherein said upper refractory seal comprises gripping means for holding said outer pipe member at selected positions on said inner pipe member.

Claim 7

In a teeming or casting system of the type including an upper melt container containing a melt and having a selectively closeable outlet nozzle through which said melt is to be teemed, a lower melt container positioned to receive said melt from said outlet nozzle of said upper melt container, and a refractory teeming pipe connected to said outlet nozzle and through which said melt passes to said lower melt container, the improvements wherein said upper and lower melt containers are immovable with respect to each other in vertical directions, and wherein said teeming pipe comprises: a refractory inner pipe member connected to said outlet nozzle of said upper melt container; and a refractory outer pipe member telescopically slidably mounted about said inner pipe member for axial movement relative thereto between an upper retracted position, whereat said outer pipe member is entirely positioned above and does not extend into said lower melt container, and a lower extended position, whereat said outer pipe member extends downwardly into the interior of said lower melt container.

Claim 8

In a teeming or casting system of the type including an upper melt container containing a melt and having a selectively closeable outlet nozzle through which said melt is to be teemed, a lower melt container positioned to receive said melt from said outlet nozzle of said upper melt container, and a refractory teeming pipe connected to said outlet nozzle and through which said melt passes to said lower melt container, the improvements wherein said upper and lower melt containers are immovable with respect to each other in vertical directions, and wherein said teeming pipe comprises: a refractory inner pipe member connected to said outlet nozzle of said upper melt container; and a refractory outer pipe member telescopically slidably mounted about said inner pipe member for axial movement relative thereto between an upper retracted position, whereat said outer pipe member is entirely positioned above and does not extend into said lower melt container, and a lower extended position, whereat said outer pipe member extends downwardly into the interior of said lower melt container.

Claim 9

The improvement claimed in claim 6, wherein said inner and outer pipe members include respective outer metal jackets.

Claim 10

The improvement claimed in claim 6 or 7, wherein said outer pipe member surrounds said inner pipe member with a narrow annular gap therebetween.

Claim 11

The improvement claimed in claim 8, further comprising an upper refractory seal supported by said outer pipe member adjacent the end thereof closest to said upper melt container, said upper refractory seal closing one end of said annular gap.

Claim 12

The improvement claimed in claim 9, further comprising an additional refractory seal supported by said outer pipe member at a position spaced from said upper refractory seal, said additional refractory seal defining with said upper refractory seal an annular space.

Claim 13

The improvement claimed in claim 10, wherein said additional refractory seal is permeable to gas, and further comprising means for supplying a gas to said annular space between said refractory seals.

Claim 14

The improvement claimed in claim 9, wherein said upper refractory seal comprises gripping means for holding said outer pipe member at selected positions on said inner pipe member.

Claim 15

The improvement claimed in claim 6, further comprising pin connection means for fixing said outer pipe member to said inner pipe member at said retracted and extended positions.

Claim 16

The improvement claimed in claim 6, further comprising means for adjustably moving said outer pipe member between said retracted and extended positions.

Claim 17

The improvement claimed in claim 14, wherein said moving means comprises a fork-shaped movable positioning mechanism adapted to be attached to one of said melt containers and having arms, and abutment means on said outer pipe member and dimensioned to receive said arms.

Claim 18

A refractory teeming pipe for use at the outlet of a melt container used in a teeming or casting operation, said teeming pipe comprising: a refractory inner pipe member adapted to be connected to the outlet of a melt container; a refractory outer pipe member telescopically slidably mounted about said inner pipe member for axial movement relative thereto between an upper retracted position and a lower extended position; and pin connection means for fixing said outer pipe member to said inner pipe member at said retracted and extended positions.

Claim 19

A refractory teeming pipe for use at the outlet of a melt container used in a teeming or casting operation, said teeming pipe comprising: a refractory inner pipe member adapted to be connected to the outlet of a melt container; a refractory outer pipe member telescopically slidably mounted about said inner pipe member for axial movement relative thereto between an upper retracted position and a lower extended position; and pin connection means for fixing said outer pipe member to said inner pipe member at said retracted and extended positions.

Claim 20

A teeming pipe as claimed in claim 16, wherein said inner and outer pipe members include respective outer metal jackets.

Claim 21

A teeming pipe as claimed in claim 16 or 17, wherein said outer pipe member surrounds said inner pipe member with a narrow annular gap therebetween.

Claim 22

A teeming pipe as claimed in claim 18, further comprising an upper refractory seal supported by said outer pipe member adjacent the end thereof closest to the melt container, said upper refractory seal closing one end of said annular gap.

Claim 23

A teeming pipe as claimed in claim 19, further comprising an additional refractory seal supported by said outer pipe member at a position spaced from said upper refractory seal, said additional refractory seal defining with said upper refractory seal an annular space.

Claim 24

A teeming pipe as claimed in claim 20, wherein said additional refractory seal is permeable to gas, and further comprising means for supplying a gas to said annular space between said refractory seals.

Claim 25

A teeming pipe as claimed in claim 19, wherein said upper refractory seal comprises gripping means for holding said outer pipe member at selected positions on said inner pipe member.

Claim 26

A teeming pipe as claimed in claim 16, further comprising means for adjustably moving said outer pipe member between said refracted and extended positions.

Claim 27

A teeming pipe as claimed in claim 23, wherein said moving means comprises a fork-shaped movable positioning mechanism adapted to be attached to the melt container and having arms, and abutment means on said outer pipe member and dimensioned to receive said arms.

Claim 28

A refractory teeming pipe for use at the outlet of a melt container used in a teeming or casting operation, said teeming pipe comprising: a refractory inner pipe member adapted to be connected to the outlet of a melt container; a refractory outer pipe member telescopically slidably mounted about said inner pipe member for axial movement relative thereto between an upper retracted position and a lower extended position; and means for adjustably moving said outer pipe member between said retracted and extended positions.

Claim 29

A refractory teeming pipe for use at the outlet of a melt container used in a teeming or casting operation, said teeming pipe comprising: a refractory inner pipe member adapted to be connected to the outlet of a melt container; a refractory outer pipe member telescopically slidably mounted about said inner pipe member for axial movement relative thereto between an upper retracted position and a lower extended position; and means for adjustably moving said outer pipe member between said retracted and extended positions.

Claim 30

A teeming pipe as claimed in claim 25, wherein said moving means comprises a fork-shaped movable positioning mechanism adapted to be attached to the melt container and having arms, and abutment means on said outer pipe member and dimensional to receive said arms.

Claim 31

A teeming pipe as claimed in claim 25, wherein said inner and outer pipe members include respective outer metal jackets.

Claim 32

A teeming pipe as claimed in claim 25 or 27, wherein said outer pipe member surrounds said inner pipe member with a narrow annular gap therebetween.

Claim 33

A teeming pipe as claimed in claim 28, further comprising an upper refractory seal supported by said outer pipe member adjacent the end thereof closest to the melt container, said upper refractory seal closing one end of said annular gap.

Claim 34

A teeming pipe as claimed in claim 29, further comprising an additional refractory seal supported by said outer pipe member at a position spaced from said upper refractory seal, said additional refractory seal defining with said upper refractory seal in annular space.

Claim 35

A teeming pipe as claimed in claim 30, wherein said additional refractory seal is permeable to gas, and further comprising means for supplying a gas to said annular space between said refractory seals.

Claim 36

A teeming pipe as claimed in claim 29, wherein said upper refractory seal comprises gripping means for holding said outer pipe member at selected positions on said inner pipe member.