EP0378150A2 - Reduction plate - Google Patents

Reduction plate Download PDF

Info

Publication number
EP0378150A2
EP0378150A2 EP90100308A EP90100308A EP0378150A2 EP 0378150 A2 EP0378150 A2 EP 0378150A2 EP 90100308 A EP90100308 A EP 90100308A EP 90100308 A EP90100308 A EP 90100308A EP 0378150 A2 EP0378150 A2 EP 0378150A2
Authority
EP
European Patent Office
Prior art keywords
casting
refractory material
reducing plate
reduction plate
steel
Prior art date
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.)
Withdrawn
Application number
EP90100308A
Other languages
German (de)
French (fr)
Other versions
EP0378150A3 (en
Inventor
Albrecht Gräfer
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.)
Individual
Original Assignee
Individual
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.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0378150A2 publication Critical patent/EP0378150A2/en
Publication of EP0378150A3 publication Critical patent/EP0378150A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates

Definitions

  • the invention relates to a reducing plate with at least one opening for use in the inlet funnels of casting molds, in particular for casting steel, gray or light metal castings.
  • sieve cores are used as reducing plates in the inlet funnels. These have the effect that, on the one hand, the molten metal is dammed up in the pouring funnel and pieces of slag and oxide skin can collect on the surface and, on the other hand, the metal reaches the casting at a lower speed and without pressure through the barrels.
  • the sieve cores made of ceramic, clay or similar materials break out frequently and thus lead to rejects.
  • ceramic sieve cores have therefore already been proposed which are made from refractory material. However, these are relatively thick. These can also break, causing all impurities in the iron to reach the casting.
  • constriction cores made of core material, clay or ceramic are known as reducing plates, which are attached between the casting and the inlet funnel.
  • the inlet funnels are used to collect the metal flowing out of the ladle. The metal flows from the inlet funnel through an inflow channel into the mold. Parts of slag can get into the mold. This is largely prevented by the constricting cores in that the metal melt is jammed in the inlet funnel by reducing the cross section. The narrowing also has the effect that the funnel can be knocked off better after the casting process has ended.
  • a disadvantage here is the increased risk of breakage and the associated increase in rejects.
  • the object of the invention is therefore to provide a reducing plate of the type mentioned at the outset, with which a safe, precisely meterable casting process is made possible.
  • the reducing plate consists of sheet steel or the like.
  • Metal which has a coating of refractory material at least on the inlet side.
  • sprue plates are already known, which consist of steel plates. These are also placed in the sprue. However, these have no breakthrough and then build up the molten metal until the pouring plate melts. The slag particles initially float when using these sprue plates, but after melting they can be carried away by the suction effect.
  • the entire surface of the reducing plate has a coating made of refractory material. This means that the edges of the steel body of the reducing plate in the area of the opening or the openings cannot come into contact with the hot molten metal. This prevents the breakthroughs from increasing and thus the casting speed from increasing.
  • the refractory material is ceramic.
  • the ceramic coating according to the invention acts on the one hand as a heat shield and prevents the steel core from melting, which enables a reduced, precisely metered speed, on the other hand the ceramic layer significantly improves the knocking off of the funnel after the casting process has ended, since the ceramic layer does not have a fixed connection with the finished casting allows.
  • the refractory material is chromium oxide, silicon oxide, aluminum oxide, molybdenum, zirconium and / or enamel. These materials also offer an effective heat shield for the steel body of the reducing plate according to the invention.
  • the casting plate 1 shown in FIG. 1 is hexagonal and has a rectangular opening 2. As can be seen from FIG. 2, the steel core 3 is surrounded on all sides by a ceramic layer 4.
  • the reducing plate 1 can be used in place of known sieve cores or constriction cores in (not shown) inlet funnels of casting molds. As a result, their dimensions also depend on the local conditions of the inlet funnel.
  • the reducing plate can also have a circular shape or any other shape.
  • the reducing plate 5 shown in FIG. 3 is circular and has several circular openings 6.
  • the openings 6 shown in FIG. 3 are arranged symmetrically on the reducing plate 5, any other arrangement or number of openings being possible.
  • the reducing plate 5 shown in FIG. 6 is coated on one side only with a ceramic layer 7. This can have the same composition as the ceramic layer 4 of the reducing plate 1 shown in FIGS. 1 and 2.
  • the coating can also consist of chromium oxide, silicon oxide, aluminum oxide, molybdenum, zirconium and / or enamel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Gears, Cams (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention describes a reduction plate (1) with at least one opening (2) for use in feed hoppers or casting moulds, in particular for casting steel, grey cast iron or light alloy castings, which is intended to make possible a reliable, precisely metered casting process. This is achieved according to the invention by the fact that the reduction plate (1) consists of sheet steel or a similar metal (3), which has a coating (4) of refractory material at least on the entry side. <IMAGE>

Description

Die Erfindung betrifft eine Reduzierplatte mit wenigstens einem Durchbruch für den Einsatz in Einlauftrichtern von Gießformen, insbesondere zum Gießen von Stahl-, Grau- oder Leichtmetallguß.The invention relates to a reducing plate with at least one opening for use in the inlet funnels of casting molds, in particular for casting steel, gray or light metal castings.

Beim Gießen von Stahl-, Grau- oder Leichtmetallguß werden in Einlauftrichtern als Reduzierplatten sogenannte Siebkerne eingesetzt. Diese bewirken, daß einerseits die Metallschmelze im Eingußtrichter aufgestaut wird und sich Schlackenteile und Oxydhäutchen an der Oberfläche sammeln können und andererseits das Metall mit geringerer Geschwindigkeit und ohne Druck durch die Läufe zum Gußstück gelangt. Die aus Keramik, Ton oder ähnlichen Materialien gefertigten Siebkerne brechen jedoch des öfteren aus und führen dadurch zu Ausschuß. Um die Haltbarkeit der Siebkerne zu verbessern, wurden daher bereits keramische Siebkerne vorgeschlagen, die aus feuerfestem Material her­gestellt sind. Diese sind jedoch relativ dick. Außerdem können auch diese brechen, wodurch alle Verunreinigungen im Eisen zum Gußstück gelangen.When casting steel, gray or light metal castings, so-called sieve cores are used as reducing plates in the inlet funnels. These have the effect that, on the one hand, the molten metal is dammed up in the pouring funnel and pieces of slag and oxide skin can collect on the surface and, on the other hand, the metal reaches the casting at a lower speed and without pressure through the barrels. However, the sieve cores made of ceramic, clay or similar materials break out frequently and thus lead to rejects. To improve the durability of the sieve cores, ceramic sieve cores have therefore already been proposed which are made from refractory material. However, these are relatively thick. These can also break, causing all impurities in the iron to reach the casting.

Neben den Siebkernen sind als Reduzierplatten auch sogenannte Einschnürkerne aus Kernmasse, Ton oder Keramik bekannt, die zwischen dem Gußstück und dem Einlauftrichter angebracht wer­den. Die Einlauftrichter dienen zum Auffangen des aus der Gießpfanne ausfließenden Metalls. Das Metall fließt aus dem Einlauftrichter durch einen Einströmkanal in die Gußform. Dabei können Schlackenteile mit in die Form gelangen. Dies wird durch die Einschnürkerne dadurch weitgehend verhindert, daß die Metallschmelze durch die Reduzierung des Querschnittes in dem Einlauftrichter gestaut wird. Durch die Verengung wird außerdem bewirkt, daß sich der Trichter nach Beendigung des Gießvor­ganges besser abschlagen läßt. Nachteilig ist auch hier die erhöhte Bruchgefahr und die damit einhergehende Erhöhung des Ausschusses.In addition to the sieve cores, so-called constriction cores made of core material, clay or ceramic are known as reducing plates, which are attached between the casting and the inlet funnel. The inlet funnels are used to collect the metal flowing out of the ladle. The metal flows from the inlet funnel through an inflow channel into the mold. Parts of slag can get into the mold. This is largely prevented by the constricting cores in that the metal melt is jammed in the inlet funnel by reducing the cross section. The narrowing also has the effect that the funnel can be knocked off better after the casting process has ended. A disadvantage here is the increased risk of breakage and the associated increase in rejects.

Aufgabe der Erfindung ist es daher, eine Reduzierplatte der eingangs genannten Art zu schaffen, mit der ein sicherer, genau dosierbarer Gießvorgang ermöglicht wird.The object of the invention is therefore to provide a reducing plate of the type mentioned at the outset, with which a safe, precisely meterable casting process is made possible.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Reduzierplatte aus Stahlblech oder dgl. Metall besteht, das zumindest auf der einlaufseitigen Seite eine Beschichtung aus feuerfestem Material aufweist. Durch die Beschichtung des als Grundkörper dienenden Stahlbleches mit einem feuerfesten Ma­terial erhält das Stahlblech oder dgl. Metall einen Hitze­schild, der ein Durchschmelzen des Stahlbleches verhindert.This object is achieved in that the reducing plate consists of sheet steel or the like. Metal, which has a coating of refractory material at least on the inlet side. By coating the steel sheet serving as the base body with a refractory material, the steel sheet or the like metal is given a heat shield which prevents the steel sheet from melting.

Es sind zwar bereits sogenannte Eingußplättchen bekannt, die aus Stahlplattinen bestehen. Diese werden ebenfalls im Ein­gußtrichter angebracht. Diese weisen jedoch keinen Durchbruch auf und stauen damit zunächst die Metallschmelze auf, bis daß Eingußplättchen durchschmilzt. Die Schlackenteilchen schwimmen bei der Verwendung dieser Eingußplättchen zwar zunächst eben­falls auf, können jedoch nach dem Durchschmelzen durch die Sogwirkung mitgerissen werden.So-called sprue plates are already known, which consist of steel plates. These are also placed in the sprue. However, these have no breakthrough and then build up the molten metal until the pouring plate melts. The slag particles initially float when using these sprue plates, but after melting they can be carried away by the suction effect.

Gemäß einer bevorzugten Ausführungsform der Erfindung weist die gesamte Oberfläche der Reduzierplatte eine Beschichtung aus feuerfestem Material auf. Damit können die Ränder des Stahl­körpers der Reduzierplatte im Bereich des Durchbruchs bzw. der Durchbrüche nicht mit der heißen Metallschmelze in Berührung gelangen. So wird verhindert, daß die Durchbrüche sich ver­größern und sich damit auch die Gießgeschwindigkeit erhöht.According to a preferred embodiment of the invention, the entire surface of the reducing plate has a coating made of refractory material. This means that the edges of the steel body of the reducing plate in the area of the opening or the openings cannot come into contact with the hot molten metal. This prevents the breakthroughs from increasing and thus the casting speed from increasing.

Gemäß einer besonders vorteilhaften Ausgestaltung der Erfindung ist das feuerfeste Material Keramik. Die erfindungsgemäße Keramikbeschichtung wirkt einerseits als Hitzeschild und ver­hindert ein Abschmelzen des Stahlkernes, wodurch eine redu­zierte, genau dosierbare Geschwindigkeit ermöglicht wird, andererseits wird durch die Keramikschicht das Abschlagen des Trichters nach Beendigung des Gießvorganges wesentlich ver­bessert, da die Keramikschicht mit dem fertigen Guß keine feste Verbindung zuläßt.According to a particularly advantageous embodiment of the invention, the refractory material is ceramic. The ceramic coating according to the invention acts on the one hand as a heat shield and prevents the steel core from melting, which enables a reduced, precisely metered speed, on the other hand the ceramic layer significantly improves the knocking off of the funnel after the casting process has ended, since the ceramic layer does not have a fixed connection with the finished casting allows.

In Weiterbildung dieses Erfindungsgedankens ist vorgesehen, daß das feuerfeste Material Chromoxid, Siliciumoxid, Aluminiumoxid, Molybdän, Zirkon und/oder Emaille ist. Auch diese Materialien bieten einen wirksamen Hitzeschild für den Stahlkörper der erfindungsgemäßen Reduzierplatte.In a further development of this inventive idea it is provided that the refractory material is chromium oxide, silicon oxide, aluminum oxide, molybdenum, zirconium and / or enamel. These materials also offer an effective heat shield for the steel body of the reducing plate according to the invention.

Weitere Merkmale, Vorteile und Anwendungsmöglichkeiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen und der Zeichnung. Dabei bilden alle beschriebenen und/oder bildlich dargestellten Merkmale für sich oder in beliebiger Kombination den Gegenstand der Erfindung, unabhängig von ihrer Zusammenfassung in den Ansprüchen oder deren Rückbeziehung.Further features, advantages and possible uses of the invention result from the following description of Embodiments and the drawing. All of the described and / or illustrated features, alone or in any combination, form the subject matter of the invention, regardless of their summary in the claims or their relationship.

Es zeigen:

  • Fig. 1 eine Draufsicht auf eine erfindungsgemäße Reduzier­platte,
  • Fig. 2 einen Schnitt durch die in Fig. 1 gezeigte Reduzier­platte entlang der Linie II-II,
  • Fig. 3 eine Draufsicht auf eine weitere Ausführungsform einer erfindungsgemäßen Reduzierplatte und
  • Fig. 4 einen Schnitt durch die in Fig. 3 gezeigte Reduzier­platte entlang der Linie IV-IV.
Show it:
  • 1 is a plan view of a reducing plate according to the invention,
  • 2 shows a section through the reducing plate shown in FIG. 1 along the line II-II,
  • Fig. 3 is a plan view of a further embodiment of a reducing plate according to the invention and
  • Fig. 4 shows a section through the reducing plate shown in Fig. 3 along the line IV-IV.

Die in Fig. 1 gezeigte Gießplatte 1 ist sechseckig und weist einen rechteckigen Durchbruch 2 auf. Wie aus Fig. 2 zu ersehen ist, ist der Stahlkern 3 allseitig von einer keramischen Schicht 4 umgeben.The casting plate 1 shown in FIG. 1 is hexagonal and has a rectangular opening 2. As can be seen from FIG. 2, the steel core 3 is surrounded on all sides by a ceramic layer 4.

Die Reduzierplatte 1 kann an Stelle von bekannten Siebkernen oder von Einschnürkernen in (nicht dargestellten) Einlauf­trichtern von Gießformen eingesetzt werden. Folglich sind auch ihre Abmessungen von den örtlichen Gegebenheiten der Einlauf­trichter abhängig. So kann die Reduzierplatte auch kreisfömig oder eine andere beliebige Form aufweisen.The reducing plate 1 can be used in place of known sieve cores or constriction cores in (not shown) inlet funnels of casting molds. As a result, their dimensions also depend on the local conditions of the inlet funnel. The reducing plate can also have a circular shape or any other shape.

Die in Fig. 3 dargestellte Reduzierplatte 5 ist kreisrund und weist mehrere kreisrunde Durchbrüche 6 auf. Die in Fig. 3 gezeigten Durchbrüche 6 sind symmetrisch auf der Reduzierplatte 5 angeordnet, wobei auch eine jede andere Anordnung oder Anzahl von Durchbrüchen möglich ist. Die in Fig. 6 gezeigte Reduzier­platte 5 ist nur einseitig mit einer Keramikschicht 7 be­schichtet. Diese kann die gleiche Zusammensetzung wie die Keramikschicht 4 der in den Fig. 1 und 2 gezeigten Reduzier­platte 1 aufweisen. Die Beschichtung kann aber auch aus Chrom­oxid, Siliciumoxid, Aluminiumoxid, Molybdän, Zirkon und/oder Emaille bestehen.The reducing plate 5 shown in FIG. 3 is circular and has several circular openings 6. The openings 6 shown in FIG. 3 are arranged symmetrically on the reducing plate 5, any other arrangement or number of openings being possible. The reducing plate 5 shown in FIG. 6 is coated on one side only with a ceramic layer 7. This can have the same composition as the ceramic layer 4 of the reducing plate 1 shown in FIGS. 1 and 2. However, the coating can also consist of chromium oxide, silicon oxide, aluminum oxide, molybdenum, zirconium and / or enamel.

Claims (4)

1. Reduzierplatte mit wenigstens einem Durchbruch für den Einsatz in Einlauftrichtern von Gießformen, insbesondere zum Gießen von Stahl-, Grau- oder Leichtmetallguß, dadurch ge­kennzeichnet, daß die Reduzierplatte (1, 5) aus Stahlblech oder dgl. Metall (3) besteht, das zumindest auf der einlaufseitigen Seite eine Beschichtung (4, 7) aus feuerfestem Material auf­weist.1. Reduction plate with at least one opening for use in the inlet funnels of casting molds, in particular for casting steel, gray or light metal casting, characterized in that the reducing plate (1, 5) consists of sheet steel or the like. Metal (3), the has a coating (4, 7) made of refractory material at least on the inlet side. 2. Reduzierplatte nach Anspruch 1, dadurch gekennzeichnet, daß die gesamte Oberfläche der Reduzierplatte (1) eine Beschichtung (4) aus feuerfestem Material aufweist.2. Reducing plate according to claim 1, characterized in that the entire surface of the reducing plate (1) has a coating (4) made of refractory material. 3. Reduzierplatte nach Anspruch 1 oder 2, dadurch gekennzeich­net, daß das feuerfeste Material (4, 7) Keramik ist.3. Reduction plate according to claim 1 or 2, characterized in that the refractory material (4, 7) is ceramic. 4. Reduzierplatte nach Anspruch 1 oder 2, dadurch gekennzeich­net, daß das feuerfeste Material (4, 7) Chromoxid, Silicium­oxid, Aluminiumoxid, Molybdän, Zirkon und/oder Emaille ist.4. Reduction plate according to claim 1 or 2, characterized in that the refractory material (4, 7) is chromium oxide, silicon oxide, aluminum oxide, molybdenum, zirconium and / or enamel.
EP19900100308 1989-01-09 1990-01-08 Reduction plate Withdrawn EP0378150A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8900161U 1989-01-09
DE8900161U DE8900161U1 (en) 1989-01-09 1989-01-09 Reducing plate

Publications (2)

Publication Number Publication Date
EP0378150A2 true EP0378150A2 (en) 1990-07-18
EP0378150A3 EP0378150A3 (en) 1991-01-09

Family

ID=6834883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900100308 Withdrawn EP0378150A3 (en) 1989-01-09 1990-01-08 Reduction plate

Country Status (2)

Country Link
EP (1) EP0378150A3 (en)
DE (1) DE8900161U1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451505A (en) * 1945-05-21 1948-10-19 Edwin T Myskowski Screen for casting risers
US3598732A (en) * 1969-10-14 1971-08-10 American Metal Climax Inc Coated molybdenum mesh screen for ferrous metal casting molds
FR2539061A1 (en) * 1983-01-11 1984-07-13 Fonderie Mecanique Ste Bretonn Filtering device for casting ferrous metals
DE3525637A1 (en) * 1985-07-18 1987-01-22 Gerhard Dipl Ing Vitt Breaker core for feeders

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451505A (en) * 1945-05-21 1948-10-19 Edwin T Myskowski Screen for casting risers
US3598732A (en) * 1969-10-14 1971-08-10 American Metal Climax Inc Coated molybdenum mesh screen for ferrous metal casting molds
FR2539061A1 (en) * 1983-01-11 1984-07-13 Fonderie Mecanique Ste Bretonn Filtering device for casting ferrous metals
DE3525637A1 (en) * 1985-07-18 1987-01-22 Gerhard Dipl Ing Vitt Breaker core for feeders

Also Published As

Publication number Publication date
DE8900161U1 (en) 1989-08-03
EP0378150A3 (en) 1991-01-09

Similar Documents

Publication Publication Date Title
DE2727742B2 (en)
DE8900819U1 (en) Casting mould for metal casting and sleeve for this
DE69002943T2 (en) Baffle plate for intermediate vessel.
CH644340A5 (en) COMPOSITE PRODUCTS MADE OF REFRACTORY MATERIAL.
EP0351414A1 (en) Immersion nozzle for metallurgical recipients.
WO1993000191A1 (en) Immersion casting pipe for thin slabs
DE102010023646A1 (en) Device, runner and method for tilt casting of light metal components and components cast therewith
CH676094A5 (en)
CH636784A5 (en) COOLED CONTINUOUS CHOCOLATE WITH A DEVICE FOR GENERATING AN ELECTROMAGNETIC FORCE FIELD.
DE8432011U1 (en) MOLDING FORM
DE3831285A1 (en) METHOD FOR PRODUCING A PISTON OF AN INTERNAL COMBUSTION ENGINE
DE3614730C2 (en)
DE1204368B (en) Blow nozzle for the production of fibers from molten silicates such as glass, minerals and the like. like
DE3807347C2 (en)
DE1483628A1 (en) Bottom plugs for block molds and process for their manufacture
EP0378150A2 (en) Reduction plate
DE3621334C1 (en) Method and device for the production of metallic mouldings
EP2752260B9 (en) Refractory ceramic floor
WO1981000067A1 (en) Mold with core
EP0126847A1 (en) Ceramic filter
EP0770440B1 (en) Ladle for holding hot molten casting material and an edge brick for this ladle
DE2660696C2 (en) Induction furnace for continuous casting
DE2250048B2 (en) Refractory pouring pipe for the continuous casting of molten metals, in particular steel
DE1083509B (en) Electric multi-chamber melting furnace for melting down metals with a melting chamber and a holding and removal chamber
DE69308719T2 (en) Device for continuous casting with double rolls of thin metallic products

Legal Events

Date Code Title Description
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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

ITCL It: translation for ep claims filed

Representative=s name: STEFANO RUFFINI

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910710