Sampling device for molten metal

Claim 2

A molten metal sampling device for use with a source of vacuum comprising a. an elongated tubular support member open at both end portions and connectable at its upper end portion to the source of vacuum, b. a gas impervious, thermal insulating, refractory casing supported by and hermetically sealed to the lower end portion of the tubular support member, c. a cylindrical mold open at each end, one end portion of the cylindrical mold projecting into and being supported by and in hermetically sealed relation to the refractory casing with the opening in the upper end portion in communication with the interior of the refractory casing and with the lower end portion of the cylindrical mold exposed, d. a metal cap closing the opening in the lower end portion of the cylindrical mold while leaving exposed a portion of the exterior walls of the cylindrical mold contiguous to the metal cap, and e. a continuous, homogeneous and impervious plastic material coating covering the metal cap and at least a portion of the exposed exterior walls of the portion of the cylindrical mold contiguous to the metal cap, the plastic material coating hermetically sealing the connection between the metal cap and the cylindrical mold, f. the thickness of the plastic material coating and the composition of the plastic material coating being such that on movement of the sampling device into a body of molten metal to be sampled through a surface layer of slag or fluxing material, the plastic material coating will decompose into gaseous form at a rate and in a quantity to remove completely from proximity to the lower end exterior walls of the cylindrical mold with the desired sample of the molten metal.

Claim 3

A device as claimed in claim 1 in which g. the character of the plastic material coating results from dipping the metal cap and said portion of the exposed sidewalls of the lower portion of the cylindrical mold into a body of liquid plastic material and hardening the resulting coating.

Claim 4

The device claimed in claim 2 in which h. the plastic material coating comprises at least one substance selected from the group consisting of resins derived from acrylic and methacrylic acids.

Claim 5

The device claimed in claim 1 in which g. the plastic material coating comprises at least one substance selected from the group consisting of resins derived from acrylic and methacrylic acids.

Claim 6

A molten metaL sampling device for use with a source of vacuum comprising a. an elongated tubular support member open at both end portions and connectiable at its upper portion to the source of vacuum, b. a sample mold chamber supported by the tubular support member, the interior of the mold chamber being in communication with the open lower end of the tubular support member, c. an elongated sample cylindrical mold having exterior walls and openings at both end portions into the interior, the cylindrical mold having the opening at its upper end portion in communication with the interior of the mold chamber, d. a gas impervious, thermal insulating refractory casing surrounding and spaced from the mold chamber and surrounding and in hermetically sealed relation to the lower end portion of the tubular support member and the upper end portion of the cylindrical mold, e. a metal cap closing the opening in the lower end portion of the cylindrical mold while leaving exposed a portion of the exterior walls of the cylindrical mold contiguous to the metal cap, and f. a continuous, homogeneous and impervious plastic material coating covering the metal cap and at least a portion of the exposed exterior walls of the portion of the cylindrical mold contiguous to the metal cap, the plastic material coating hermetically sealing the connection between the metal cap and the cylindrical mold, g. the thickness of the plastic material coating and the composition of the plastic material coating being such that on movement of the sampling device into a body of molten metal to be sampled through a surface layer of slag or fluxing material, the plastic material coating will decompose into gaseous form at a rate and in a quantity to remove completely from proximity to the lower end exterior walls of the cylindrical mold slag or fluxing material which otherwise might enter the cylinder with the desired sample of the molten metal.

Claim 7

A molten metaL sampling device for use with a source of vacuum comprising a. an elongated tubular support member open at both end portions and connectiable at its upper portion to the source of vacuum, b. a sample mold chamber supported by the tubular support member, the interior of the mold chamber being in communication with the open lower end of the tubular support member, c. an elongated sample cylindrical mold having exterior walls and openings at both end portions into the interior, the cylindrical mold having the opening at its upper end portion in communication with the interior of the mold chamber, d. a gas impervious, thermal insulating refractory casing surrounding and spaced from the mold chamber and surrounding and in hermetically sealed relation to the lower end portion of the tubular support member and the upper end portion of the cylindrical mold, e. a metal cap closing the opening in the lower end portion of the cylindrical mold while leaving exposed a portion of the exterior walls of the cylindrical mold contiguous to the metal cap, and f. a continuous, homogeneous and impervious plastic material coating covering the metal cap and at least a portion of the exposed exterior walls of the portion of the cylindrical mold contiguous to the metal cap, the plastic material coating hermetically sealing the connection between the metal cap and the cylindrical mold, g. the thickness of the plastic material coating and the composition of the plastic material coating being such that on movement of the sampling device into a body of molten metal to be sampled through a surface layer of slag or fluxing material, the plastic material coating will decompose into gaseous form at a rate and in a quantity to remove completely from proximity to the lower end exterior walls of the cylindrical mold slag or fluxing material which otherwise might enter the cylinder with the desired sample of the molten metal.

Claim 8

A device as claimed in claim 5 in which h. the character of the plastic material coating results from dipping the metal cap and said portion of the exposed sidewalls of the lower portion of the cylindrical mold into a body of liquid plastic material and hardening the resulting coating.

Claim 9

The device claimed in claim 6 in which i. the plastic material coating comprises at least one substance selected from the group consisting of resins derived from acrylic and methacrylic acids.

Claim 10

The device claimed in claim 5 in which h. the plastic material coating comprises at least one substance selected from the group consisting of resins derived from acrylic and methacrylic acids.

Claim 11

A molten metal sampling system comprising a. an evacuating means for continuously supplying a vacuum b. an elongated tubular support member open at both end portions and connectable at its upper end portion to the means for supplying vacuum, c. a gas impervious, thermal insulating, refractory casing supported by and hermetically sealed to the lower end portion of the tubular support member, d. a cylindrical mold open at each end, one end portion of the cylindrical mold projecting into and being supported by and in hermetically sealed relation to the refractory casing with the opening in the upper end portion in communication with the interior of the refractory casing and with the lower end portion of the cylindrical mold exposed, e. a metal cap closing the opening in the lower end portion of the cylindrical mold while leaving exposed a portion of the exterior walls of the cylindrical mold contiguous to the metal cap, and f. a continuous, homogeneous and impervious plastic material coating covering the metal cap and at least a portion of the exposed exterior walls of the portion of the cylindrical mold contiguous to the metal cap, the plastic material coating hermetically sealing the connection between the metal cap and the cylindrical mold, g. the thickness of the plastic material coating and the composition of the plastiC material coating being such that on movement of the sampling device into a body of molten metal to be sampled through a surface layer of slag or fluxing material, the plastic material coating will decompose into gaseous form at a rate and in a quantity to remove completely from proximity to the lower end exterior walls of the cylindrical mold with the desired sample of the molten metal.

Claim 12

A molten metal sampling system comprising a. an evacuating means for continuously supplying a vacuum b. an elongated tubular support member open at both end portions and connectable at its upper end portion to the means for supplying vacuum, c. a gas impervious, thermal insulating, refractory casing supported by and hermetically sealed to the lower end portion of the tubular support member, d. a cylindrical mold open at each end, one end portion of the cylindrical mold projecting into and being supported by and in hermetically sealed relation to the refractory casing with the opening in the upper end portion in communication with the interior of the refractory casing and with the lower end portion of the cylindrical mold exposed, e. a metal cap closing the opening in the lower end portion of the cylindrical mold while leaving exposed a portion of the exterior walls of the cylindrical mold contiguous to the metal cap, and f. a continuous, homogeneous and impervious plastic material coating covering the metal cap and at least a portion of the exposed exterior walls of the portion of the cylindrical mold contiguous to the metal cap, the plastic material coating hermetically sealing the connection between the metal cap and the cylindrical mold, g. the thickness of the plastic material coating and the composition of the plastiC material coating being such that on movement of the sampling device into a body of molten metal to be sampled through a surface layer of slag or fluxing material, the plastic material coating will decompose into gaseous form at a rate and in a quantity to remove completely from proximity to the lower end exterior walls of the cylindrical mold with the desired sample of the molten metal.

Claim 13

A system as claimed in claim 9 in which h. the character of the plastic material coating results from dipping the metal cap and said portion of the exposed sidewalls of the lower portion of the cylindrical mold into a body of liquid plastic material and hardening the resulting coating.

Claim 14

The system claimed in claim 10 in which i. the plastic material coating comprises at least one substance selected from the group consisting of resins derived from acrylic and methacrylic acids.

Claim 15

The system claimed in claim 9 in which h. the plastic material coating comprises at least one substance selected from the group consisting of resins derived from acrylic and methacrylic acids.

Claim 16

A molten metal sampling system comprising a. an evacuating means for continuously supplying a vacuum b. an elongated tubular support member open at both end protions and connectable at its upper portion to the means for supplying vacuum, c. a sample mold chamber supported by the tubular support member, the interior of the mold chamber being in communication with the open lower end of the tubular support member, d. an elongated sample cylindrical mold having exterior walls and openings at both end portions into the interior, the cylindrical mold having the opening at its upper end portion in communication with the interior of the mold chamber, e. a gas impervious, thermal insulating refractory casing surrounding and spaced from the mold chamber and surrounding and in hermetically sealed relation to the lower end portion of the tubular support member and the upper end portion of the cylindrical mold, f. a metal cap closing the opening in the lower end portion of the cylindrical mold while leaving exposed a portion of the exterior walls of the cylindrical mold contiguous to the metal cap, and g. a continuous, homogeneous and impervious plastic material coating covering the metal cap and at least a portion of the exposed exterior walls of the portion of the cylindrical mold contiguous to the metal cap, the plastic material coating hermetically sealing the connection between the metal cap and the cylindrical mold, h. the thickness of the plastic material coating and the composition of the plastic material coating being such that on movement of the sampling device into a body of molten metal to be sampled through a surface layer of slag or fluxing material, the plastic material coating will decompose into gaseous form at a rate and in a quantity to remove completely from proximity to the lower end exterior walls of the cylindrical mold slag or fluxing material which otherwise might enter the cylinder with the desired sample of the molten metal.

Claim 17

A molten metal sampling system comprising a. an evacuating means for continuously supplying a vacuum b. an elongated tubular support member open at both end protions and connectable at its upper portion to the means for supplying vacuum, c. a sample mold chamber supported by the tubular support member, the interior of the mold chamber being in communication with the open lower end of the tubular support member, d. an elongated sample cylindrical mold having exterior walls and openings at both end portions into the interior, the cylindrical mold having the opening at its upper end portion in communication with the interior of the mold chamber, e. a gas impervious, thermal insulating refractory casing surrounding and spaced from the mold chamber and surrounding and in hermetically sealed relation to the lower end portion of the tubular support member and the upper end portion of the cylindrical mold, f. a metal cap closing the opening in the lower end portion of the cylindrical mold while leaving exposed a portion of the exterior walls of the cylindrical mold contiguous to the metal cap, and g. a continuous, homogeneous and impervious plastic material coating covering the metal cap and at least a portion of the exposed exterior walls of the portion of the cylindrical mold contiguous to the metal cap, the plastic material coating hermetically sealing the connection between the metal cap and the cylindrical mold, h. the thickness of the plastic material coating and the composition of the plastic material coating being such that on movement of the sampling device into a body of molten metal to be sampled through a surface layer of slag or fluxing material, the plastic material coating will decompose into gaseous form at a rate and in a quantity to remove completely from proximity to the lower end exterior walls of the cylindrical mold slag or fluxing material which otherwise might enter the cylinder with the desired sample of the molten metal.

Claim 18

A system as claimed in claim 13 in which i. the character of the plastic material coating results from dipping the metal cap and said portion of the exposed sidewalls of the lower portion of the cylindrical mold into a body of liquid plastic material and hardening the resulting coating.

Claim 19

The system claimed in claim 14 in which j. the plastic material coating comprises at least one substance selected from the group consisting of resins derived from acrylic and methacrylic acids.

Claim 20

The system claimed in claim 13 in which i. the plastic material coating comprises at least one substance selected from the group consisting of resins derived from acrylic and methacrylic acids.