EP0076564A1 - Speiser - Google Patents

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Info

Publication number: EP0076564A1
Authority: EP; European Patent Office
Prior art keywords: slab; hot top; top lining; ribs; slabs
Prior art date: 1981-09-23
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP82304235A

Other languages

English (en)

French (fr)

Other versions

EP0076564B1 (de

Inventor

Heinrich Comes

Klaus Friede

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Foseco Trading AG

Original Assignee

Foseco Trading AG

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1981-09-23

Filing date

1982-08-11

Publication date

1983-04-13

1982-08-11 Application filed by Foseco Trading AG filed Critical Foseco Trading AG

1982-08-11 Priority to AT82304235T priority Critical patent/ATE13264T1/de

1983-04-13 Publication of EP0076564A1 publication Critical patent/EP0076564A1/de

1985-05-15 Application granted granted Critical

1985-05-15 Publication of EP0076564B1 publication Critical patent/EP0076564B1/de

Status Expired legal-status Critical Current

Images

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
- B22D7/10—Hot tops therefor
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
- B22D7/10—Hot tops therefor
- B22D7/106—Configuration of hot tops

Definitions

the invention concerns hot tops for metallurgical moulds, in particular for ingot moulds, especially for casting steel.
the metal in the head of the mould In casting steel ingots it is desirable to keep the metal in the head of the mould molten whilst the metal in the body of the mould is cocling and solidifying, because the metal in the body of the mould shrinks as it cools and solidifies and, if the head metal is kept molten, the head metal feeds down into the ingot body and achieves the desirable effect of inhibiting the formation of shrinkage cavities in the body of the ingot.
the head metal may be kept molten by use of a hot top and this may comprise a number of refractory, heat-insulating articles e.g. slabs positioned as a lining in the head of the mould or in a separate head box at the top of the mould, in the latter case the head metal being within the head box.
firebrick Originally hot top linings were commonly of firebrick, usually with a density of about 2 to 3g./cm. 3 . Firebrick is not a good heat-insulator and for this reason the firebrick linings were thick e.g. 75 mm. However, the thick firebrick linings were of high thermal capacity and therefore exerted a marked and undesirable initial chilling effect on the head metal.
a hot top lining .slab is of slurry-formed refractory, heat-insulating material, has a density in the range of 0.3 to 0.85 g./ cm. 3 , has a plurality of ribs at one face of the slab defining a plurality of enclosed recesses spaced inwardly from the periphery of the slab and has an average overall thickness of at least 40 mm.
the slabs are positioned with the recessed face outwards i.e. away from the molten metal.
the slabs are slurry-formed is a manufacturing convenience and, as part of the thickness of the slabs is accounted for by the ribs, the slabs do not present the dewatering and drying difficulties that would arise if the slabs were of the same overall thickness but die not have the recesses.
the great thickness of the slabs enables an excellent heel-insulating effect to be achieved, an effect enhanced by the air in the recesses. Furthermore, good heat-insulating properties are associated with the low density of the slabs. Despite the thickness of the slabs, a very small initial chilling effect is suffered as the material of the slabs is itself of low thermal capacity, a factor associated with the low density of the slabs.
the slabs are of low density material coupled with the presence of the recesses means that, despite their thickness, the slabs are not heavy and they can easily be handled. Also, the presence of the ribs serves to increase the mechanical strength of the slabs whilst not greatly increasing their thermal capacity. This combination of properties is especially valuable as the strength of slurry-formed refractory, heat-insulating slabs tends to decrease with a decrease in density.
the thick slabs enable the proportion of head metal to be decreased.
the average overall thickness of the slabs is at least 5D mm.
the ribs preferably account for at least 30%, e.g. about 50%, of the overall thickness of the slab.
the ribs preferably define at least three recesses and the total area of the recesses at the outer face of the slab is preferably at least 30% of the total area of the outer surface of the slab.
the tapered ribs are preferably at least twice as wide at the base as at the tip.
the recesses may be of various shapes preferably generally rectangular.
the slabs may be slurry-formed in known manner using known materials and using a former shaped to form the slabs with the ribs and recesses.
the ingredients of the slab comprise particulate refractory filler, some at least of which is lightweight e.g. has a bulk density not greater than 0.35 g./cm. 3 , a binder and, optionally, organic and/or inorganic fibres.
the lightweight filler is one or more of calcined rice husks and expanded minerals, e.g. expanded perlite.
the density of the slab is most preferably 0.4 to 0.7 g./cm..
An edge of the slab (the lowermost edge in use) is preferably bevelled so that the molten metal contacting face of the slab does not extend downwards as far as the opposite face of the slab.
the bevelled edge is generally concave and the concavity is preferably provided by means of a multiple, e.g. oouble, re-entrant bevel . In this way the abruptness of the resultant shoulder is diminished and the height in the hot top where'residual mould flux remains after casting is increased.
the thickness of the slab enables the proportion of head metal to be decreased and the features just described help to maximise the proportion of the head metal that is usable.
An ingot mould having a hot top lining comprising slabs of the invention forms a part of the invention as does a head box having such a lining.
the lining is in the head of an ingot mould having straight internal walls.
the ingot mould has wells 1 tapering together upwardly to give an ingot narrower at the top than the bottom, and in the head of the mould is a hot top lining comprising four slurry-formed refractory, heat-insulating slabs 2 having a density of 0.5 g./cm. 3 .
the slabs 2 are suspended from the top of the mould by conventional means (not shown) and are held firmly in position by four wedges 3 of refractory, heat-insulating material.
Each of the slabs 2 has peripheral ribs 4, 5, 6, 7 at its outer face and these ribs together with two outwardly tapering inner ribs 6 define three recesses 9 in the outer face of the slab.
the recesses 9 may be vertically disposed in the outer face of slab 2. If desired, the eight-piece assembly illustrated in Figure 2 may be substituted by four, interengaging slabs cr a six-piece assembly consisting of four slabs and two wedges.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Control And Other Processes For Unpacking Of Materials (AREA)
Liquid Crystal Substances (AREA)
Baking, Grill, Roasting (AREA)
Furnace Housings, Linings, Walls, And Ceilings (AREA)
Road Paving Structures (AREA)
Ceramic Products (AREA)
Blast Furnaces (AREA)
Press-Shaping Or Shaping Using Conveyers (AREA)
Molds, Cores, And Manufacturing Methods Thereof (AREA)
Coating With Molten Metal (AREA)

EP82304235A 1981-09-23 1982-08-11 Speiser Expired EP0076564B1 (de)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT82304235T ATE13264T1 (de)	1981-09-23	1982-08-11	Speiser.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB8128713		1981-09-23
GB8128713		1981-09-23

Publications (2)

Publication Number	Publication Date
EP0076564A1 true EP0076564A1 (de)	1983-04-13
EP0076564B1 EP0076564B1 (de)	1985-05-15

Family

ID=10524687

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP82304235A Expired EP0076564B1 (de)	1981-09-23	1982-08-11	Speiser

Country Status (10)

Country	Link
EP (1)	EP0076564B1 (de)
KR (1)	KR880001957B1 (de)
AT (1)	ATE13264T1 (de)
AU (1)	AU546187B2 (de)
BR (1)	BR8205540A (de)
DE (1)	DE3263540D1 (de)
ES (1)	ES267396Y (de)
IN (1)	IN157313B (de)
MX (1)	MX162784A (de)
ZA (1)	ZA825958B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2002094138A1 (de)	2001-05-18	2002-11-28	Mathys Orthopädie GmbH	Knie-endoprothese

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE7119091U (de) *	1971-05-15	1971-10-28	Continentale Erzgesellschaft Mbh	Platte zur auskleidung von kokillenaufsaetzen
GB1255938A (en) *	1967-12-12	1971-12-01	Aikou Kogyo Kaisha Ltd	An improvement in or relating to a heat-resisting and retaining moulding for hot tops
GB2077160A (en) *	1980-05-17	1981-12-16	Foseco Int	Holding means for hot top lining slabs for ingot moulds

1982
- 1982-08-11 EP EP82304235A patent/EP0076564B1/de not_active Expired
- 1982-08-11 AT AT82304235T patent/ATE13264T1/de not_active IP Right Cessation
- 1982-08-11 DE DE8282304235T patent/DE3263540D1/de not_active Expired
- 1982-08-17 ZA ZA825958A patent/ZA825958B/xx unknown
- 1982-08-24 AU AU87541/82A patent/AU546187B2/en not_active Ceased
- 1982-09-21 MX MX194463A patent/MX162784A/es unknown
- 1982-09-22 BR BR8205540A patent/BR8205540A/pt not_active IP Right Cessation
- 1982-09-22 KR KR8204277A patent/KR880001957B1/ko active
- 1982-09-22 ES ES1982267396U patent/ES267396Y/es not_active Expired
- 1982-09-23 IN IN1101/CAL/82A patent/IN157313B/en unknown

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1255938A (en) *	1967-12-12	1971-12-01	Aikou Kogyo Kaisha Ltd	An improvement in or relating to a heat-resisting and retaining moulding for hot tops
DE7119091U (de) *	1971-05-15	1971-10-28	Continentale Erzgesellschaft Mbh	Platte zur auskleidung von kokillenaufsaetzen
GB2077160A (en) *	1980-05-17	1981-12-16	Foseco Int	Holding means for hot top lining slabs for ingot moulds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2002094138A1 (de)	2001-05-18	2002-11-28	Mathys Orthopädie GmbH	Knie-endoprothese

Also Published As

Publication number	Publication date
EP0076564B1 (de)	1985-05-15
KR880001957B1 (ko)	1988-10-08
ZA825958B (en)	1983-06-29
ATE13264T1 (de)	1985-06-15
AU546187B2 (en)	1985-08-22
ES267396Y (es)	1983-10-16
MX162784A (es)	1991-06-26
KR840001451A (ko)	1984-05-07
IN157313B (de)	1986-03-01
ES267396U (es)	1983-03-16
AU8754182A (en)	1983-03-31
BR8205540A (pt)	1983-08-30
DE3263540D1 (en)	1985-06-20

Publication	Publication Date	Title
EP0327226A1 (de)	1989-08-09	Metallgiessformen und Trichtereinsätze mit Filterelement
US4278124A (en)	1981-07-14	Method of producing hollow steel ingot and apparatus therefor
EP0202741B1 (de)	1988-11-09	Giessen von geschmolzenem Metall und Speiserbüchsen für die Verwendung darin
EP0076564B1 (de)	1985-05-15	Speiser
US4938802A (en)	1990-07-03	Reusable ceramic mold
US3455369A (en)	1969-07-15	Horizontal continuous casting
US1696986A (en)	1929-01-01	Hot top for molds
US4372544A (en)	1983-02-08	Blast furnace trough and liner combination
US3373794A (en)	1968-03-19	Ferroalloy casting process
US2263437A (en)	1941-11-18	Hot top
US3514069A (en)	1970-05-26	Apparatus for molding ingots
US2867871A (en)	1959-01-13	Hot-top for ingot mold
US2829410A (en)	1958-04-08	Ingot mold
US4027844A (en)	1977-06-07	Big-end-down ingot mold for casting metal
US1137144A (en)	1915-04-27	Steel manufacture.
US3432138A (en)	1969-03-11	Ingot mold with opposed exothermic sideboards
US3477682A (en)	1969-11-11	Ingot mold with hot top and refractory lining for inducing progressive axial solidification
US2166587A (en)	1939-07-18	Ingot mold and ingot
EP0115150B1 (de)	1987-03-25	Pressgiessen von Kolben
US2626436A (en)	1953-01-27	Ingot mold
GB2134234A (en)	1984-08-08	Blast furnace trough and liner combination
US1409084A (en)	1922-03-07	Ingot mold
US3166806A (en)	1965-01-26	Method of and apparatus for pouring ingots
US2127277A (en)	1938-08-16	Pouring guard
US2228545A (en)	1941-01-14	Ingot mold

Legal Events

Date	Code	Title	Description
1983-02-11	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1983-04-13	AK	Designated contracting states	Designated state(s): AT BE CH DE FR GB IT LI LU NL SE
1983-07-20	17P	Request for examination filed	Effective date: 19830429
1985-01-29	ITF	It: translation for a ep patent filed
1985-03-16	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1985-05-15	AK	Designated contracting states	Designated state(s): AT BE CH DE FR GB IT LI LU NL SE
1985-05-15	REF	Corresponds to:	Ref document number: 13264 Country of ref document: AT Date of ref document: 19850615 Kind code of ref document: T
1985-06-20	REF	Corresponds to:	Ref document number: 3263540 Country of ref document: DE Date of ref document: 19850620
1985-08-02	ET	Fr: translation filed
1986-03-20	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1986-03-20	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1986-05-07	26N	No opposition filed
1991-08-12	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: AT Payment date: 19910812 Year of fee payment: 10
1991-08-31	ITTA	It: last paid annual fee
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1992-08-11	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: AT Effective date: 19920811
1993-03-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Effective date: 19930301
1993-04-16	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee
1993-08-25	REG	Reference to a national code	Ref country code: GB Ref legal event code: 732E
1993-12-31	BECN	Be: change of holder's name	Effective date: 19931022
1993-12-31	REG	Reference to a national code	Ref country code: CH Ref legal event code: PFA Free format text: FOSECO TRADING AG
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1994-10-03	EPTA	Lu: last paid annual fee
1995-01-31	EAL	Se: european patent in force in sweden	Ref document number: 82304235.3
1995-08-11	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19950811 Ref country code: GB Effective date: 19950811
1995-08-12	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SE Effective date: 19950812
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1996-02-29	BERE	Be: lapsed	Owner name: FOSECO TRADING A.G. Effective date: 19950831
1996-04-10	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19950811
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EP0076564A1 - Speiser - Google Patents

Info

Links

Images

Classifications

Definitions

Landscapes

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=10524687

Family Applications (1)

Country Status (10)

Cited By (1)

Citations (3)

Patent Citations (3)

Cited By (1)

Also Published As

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