EP0062524A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improved casting apparatus
Assignee: Steel Castings Research and Trade Association
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Filing: 1982-04-05
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Granted: —
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Expires: 2002-04-05
Abstract
Abstract A transfer system for molten metal e.g. a gating system for feeding a mould is surrounded by compacted particulate material e.g. sand. The system comprises lengths of refractory pipe joined end-to-end and according to the invention to prevent ingress of sand, the lengths are placed in an outer sheath e.g. a cardboard tube, which is sealed at its ends. For junctions the invention provides a junction box having extensions which taper away from the box and onto which the ends of the sheath may be fitted.
Inventors
- 👤 Michael Cornelius Ashton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 09:08
CPC Classifications
B; B22; B22D; B22D35/00; B22D35/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
74 words
Apparatus for use in the casting of molten metal including a transfer system for feeding molten metal from a holding vessel to a casting vessel, the system comprising a conduit embedded in particulate refractory material such as sand, the conduit comprising a plurality of lengths of refractory pipe joined in end-to-end relation characterised in that the lengths are enclosed in an outer sheath which is sealed at its ends against ingress of particulate material.
Claim 2
Dependent Claim
74 words
Apparatus for use in the casting of molten metal including a transfer system for feeding molten metal from a holding vessel to a casting vessel, the system comprising a conduit embedded in particulate refractory material such as sand, the conduit comprising a plurality of lengths of refractory pipe joined in end-to-end relation characterised in that the lengths are enclosed in an outer sheath which is sealed at its ends against ingress of particulate material.
Claim 3
Dependent Claim
40 words
Apparatus according to Claim 1 characterised in that the system includes a junction box where the conduit changes direction and in that the junction box has an extension piece and the sheath engages with the extension piece in sealed manner.
Claim 4
Dependent Claim
49 words
Apparatus according to Claim 2, characterised in that the extension piece projects from a wall of the junction box and reduces in external diameter away from the wall and in that the sheath abuts against the wall or engages the extension piece at a point along the length thereof.
Claim 5
Dependent Claim
28 words
Apparatus according to Claim 1, 2 or 3 characterised in that the outer sheath is relatively much longer than any one length of refractory pipe or extension piece.
Claim 6
Dependent Claim
44 words
Apparatus according to Claim 1, 2, 3 or 4 characterised in that the sheath comprises one or more close fitting cardboard, paper or metal tubes, the inner diameter of which is slightly greater than the nominal outer diameter of the lengths of refractory pipe.
Claim 7
Dependent Claim
32 words
Apparatus according to Claim 5 characterised in that the sheath is.sufficiently tight-fitting with respect to the lengths to enable part or all of the gating system to form a freestanding rigid unit.
Claim 8
Dependent Claim
20 words
Apparatus according to any preceding Claim characterised in that the pipe lengths have male and female complementary engaging end walls.
Claim 9
Dependent Claim
38 words
Apparatus according to any preceding Claim characterised in that the apparatus comprises a mould box and the conduit comprises the gating system therefor and in that the conduit is surrounded by compacted particulate material which is chemically unbonded.
Claim 10
Dependent Claim
46 words
Apparatus according to Claim 8, characterised in that the joints of the sheath with the lengths of refractory pipe and the extension pieces are sealed with tape or the like to form airtight seals so that a vacuum may be drawn in the compacted particulate material.
Claim 11
Independent Claim
66 words
A method of assembling apparatus including a conduit for ingress of metal, and according to any preceding Claim characterised by locating lengths of refractory pipes in an outer sheath, connecting an end of a length of refractory pipe with a junction box having an extension piece and disposing the sheath to extend over the extension piece of the junction box so to form a sealed joint.
Claim 12
Dependent Claim
76 words
A junction box for use in apparatus according to any of Claims 1 to 9 or a method according to Claim 10, the box being formed of a refractory material and having a passageway with at least one inlet and at least one outlet and including an angled portion characterised in that an extension piece is disposed about the outlet of each bore and is dimensioned and arranged to engage a sheath in a sealed manner.
Claim 13
Dependent Claim
28 words
A box according to Claim 11 characterised in that the extension piece projects from a wall of the box and reduces in external diameter away from the wall.
Claim 14
Dependent Claim
46 words
For use in apparatus according to any of Claims 1 to 9 or a method according to Claim 10, a conduit comprising lengths of refractory pipes joined together characterised in that the lengths are enclosed in a relatively longer sheath dimensioned to fit over the lengths.
References Cited (Backward Citations)
No citation records indexed.
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