EP0060349A2 - Feeder head for castings - Google Patents

Feeder head for castings Download PDF

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Publication number
EP0060349A2
EP0060349A2 EP81110682A EP81110682A EP0060349A2 EP 0060349 A2 EP0060349 A2 EP 0060349A2 EP 81110682 A EP81110682 A EP 81110682A EP 81110682 A EP81110682 A EP 81110682A EP 0060349 A2 EP0060349 A2 EP 0060349A2
Authority
EP
European Patent Office
Prior art keywords
feeder
exothermic heating
float
casting
volume
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.)
Granted
Application number
EP81110682A
Other languages
German (de)
French (fr)
Other versions
EP0060349B1 (en
EP0060349A3 (en
Inventor
Manfred Scherer
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.)
Bosch Rexroth AG
Original Assignee
Mannesmann Rexroth 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.)
Filing date
Publication date
Application filed by Mannesmann Rexroth AG filed Critical Mannesmann Rexroth AG
Priority to AT81110682T priority Critical patent/ATE19972T1/en
Publication of EP0060349A2 publication Critical patent/EP0060349A2/en
Publication of EP0060349A3 publication Critical patent/EP0060349A3/en
Application granted granted Critical
Publication of EP0060349B1 publication Critical patent/EP0060349B1/en
Expired legal-status Critical Current

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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
    • B22C9/088—Feeder heads
    • 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 feeder according to the preamble of claim 1.
  • the body is made of exothermic heating mass in the form of a hood, as a result of which, due to the suction of cast material during the solidification process of the casting. Cavity forms in the feeder and the sinking metal mirror moves away from the base of the hood. As a result, the cast material located in the feeder is heated up less and less during the solidification process (DE-PS 20 10 337).
  • the present invention is intended to avoid the application of sprinkling agents.
  • This object is achieved according to the invention by the features in the characterizing part of claim 1.
  • the float which is designed as a compact body, can be inserted into the feeder before the casting mold is filled with casting material. It is raised by the cast material rising in the feeder and sinks with the level of the cast material during its solidification process. The cast material in the feeder is therefore covered by the float from the start, which means that both the rising of the cast material in the feeder and its sinking prevent heat losses and the cast material in the feeder is heated. As a result, the exothermic mass of the feeder is better utilized than with conventional feeders.
  • a casting 1 is molded into a sand mold 2.
  • a hollow cylindrical body 3 made of exothermic heating mass is placed on the sand mold 2, which is surrounded by a heat-insulating cover 4 made of asbestos paper and has a conical shape on its underside.
  • the feeder volume 5 has the shape of an elongated cylinder and corresponds to the suction requirement of the casting 1 plus a small safety amount forming a residual feeder 6.
  • the gate area between the casting 1 and the residual feeder is designated 7.
  • annular shoulder 8 within the body 3, which serves to support a float 9 ', which also consists of exothermic heating mass.
  • the amount of the exothermic heating mass of the body 3 and the float 9 is chosen so that the The cast material present in the feeder remains liquid until the sucking through the casting has ended.
  • the float 9 is adapted to the cross section of the feeder volume 5 in such a way that it can rise and fall within the body 3 with the level of the cast material. If poured material is poured into the empty sand mold 2, poured material also enters the body 3 at the end of the filling process and thereby lifts the float 9. During the subsequent suction process, the level of the cast material in the body 3 drops, the float 9 following it. This always remains in contact with the rising and falling metal level and heats up the cast material underneath.
  • the cross section of the feeder volume 5 can be circular, rectangular, square, ring-shaped or the like.
  • the hollow cylinder-like body 3 can be covered, in particular closed, by a cover made of the same material, in particular plate-shaped or disc-shaped, inserted therein.
  • the float 9 can be provided on its underside with a downward protrusion, in particular a spigot, made of the same material, which protrudes into the cast material in the feeder during the casting process and at the end into the remaining feeder 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

1. Feeder for castings (1), in particular of cast-iron with a body (3) of an exothermic heating material comprising a cylindrical cavity (5), which material keeps the substance located in the feeder molten until the completion of the shrinkage of the casting material through the region of the casting to be fed, in which case the feeder volume corresponds to the quantity of the shrinkage volume plus the maximum safety amount of 30% of the shrinkage volume, characterised in that the cylindrical cavity (5) is open towards the outside on its upper side and that located in this cavity (5) is a float (9) adapted to its cross section and able to move with respect to the body (3) of exothermic heating material, which float likewise consists of an exothermic heating material.

Description

Die Erfindung bezieht sich auf einen Speiser entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a feeder according to the preamble of claim 1.

Bei einem bekannten Speiser der vorgenannten Art ist der Körper aus exothermer Heizmasse haubenförmig ausgebildet, wodurch sich wegen des Nachsaugens von Gießgut während des Erstarrungsvorganges des Gußstückes ein. Hohlraum im Speiser bildet und der sinkende Metallspiegel sich von dem Grund der Haube immer mehr entfernt. Hierdurch wird im Verlaufe des Erstarrungsvorganges das im Speiser befindliche Gießgut immer weniger aufgeheizt (DE-PS 20 10 337).In a known feeder of the aforementioned type, the body is made of exothermic heating mass in the form of a hood, as a result of which, due to the suction of cast material during the solidification process of the casting. Cavity forms in the feeder and the sinking metal mirror moves away from the base of the hood. As a result, the cast material located in the feeder is heated up less and less during the solidification process (DE-PS 20 10 337).

Es ist, bereits bekannt, sofort nach dem Füllen der Form den offenen Steiger mit einem hochexothermen Lunkermittel abzudecken, wobei die Abdeckschicht mindestens so stark wie die Wanddicke der Steigerauskleidung sein muß. Das Lunkermittel wird hierbei in Form einer Schicht aufgestreut. Bei sinkendem Gießgut im Steiger tritt eine Verfestigung dieser Schicht ein. Mit Hilfe der Abdeckschicht sollen die Verluste durch Wärmeabstrahlung möglichst gering gehalten werden (Deutsche Zeitschrift "Gießerei" vom 18. März 1964, S. 142 bis 147).It is already known to cover the open riser with a highly exothermic blow medium immediately after the mold has been filled, the covering layer having to be at least as thick as the wall thickness of the riser lining. The blow medium is sprinkled in the form of a layer. As the cast material in the riser falls, this layer solidifies. With the help of the cover layer, the losses due to heat radiation should be kept as low as possible (German magazine "Gießerei" from March 18, 1964, pp. 142 to 147).

Durch die vorliegende Erfindung soll das Aufbringen von Aufstreumittel vermieden werden. Diese Aufgabe wird durch die Merkmale im Kennzeichnungsteil des Anspruches 1 erfindungsgemäß gelöst. Der als kompakte Körper ausgebildete Schwimmer kann in den Speiser schon vor dem Füllen der Gießform mit Gießgut eingesetzt werden. Er wird von dem im Speiser ansteigenden Gießgut angehoben und sinkt mit dem Spiegel des Gießgutes, während dessen Erstarrungsvorganges. Das Gießgut ist also im Speiser von Anfang an durch den Schwimmer abgedeckt, wodurch sowohl mit dem Steigen des Gießgutes im Speiser als auch mit dessen Sinken Wärmeverluste vermieden und das im Speiser befindliche Gießgut aufgeheizt wird. Hierdurch wird die exotherme Masse des Speisers besser als bei üblichen Speisern ausgenutzt.The present invention is intended to avoid the application of sprinkling agents. This object is achieved according to the invention by the features in the characterizing part of claim 1. The float, which is designed as a compact body, can be inserted into the feeder before the casting mold is filled with casting material. It is raised by the cast material rising in the feeder and sinks with the level of the cast material during its solidification process. The cast material in the feeder is therefore covered by the float from the start, which means that both the rising of the cast material in the feeder and its sinking prevent heat losses and the cast material in the feeder is heated. As a result, the exothermic mass of the feeder is better utilized than with conventional feeders.

Weitere Vorteile ergeben sich aus dem übrigen Anspruch, der Beschreibung und der Zeichnung. In dieser ist ein Speiser als Ausführungsbeispiel des Gegenstandes der Erfindung im Längsschnitt schematisch dargestellt.Further advantages result from the remaining claim, the description and the drawing. In this a feeder is shown schematically as an embodiment of the object of the invention in longitudinal section.

Ein Gußstück 1 ist in eine Sandform 2 eingeformt. Auf die Sandform 2 ist ein hohlzylinderartiger Körper 3 aus exothermer Heizmasse aufgesetzt, der von einer wärmeisolierenden Hülle 4 aus Asbestpapier umgeben ist und an seiner Unterseite kegelförmig verläuft. Das Speiservolumen 5 hat die Gestalt eines langgestreckten Zylinders und entspricht dem Nachsaugbedarf des Gußstückes 1 zuzüglich einer geringen einen Restspeiser 6 bildenden Sicherheitsmenge. Die Anschnittfläche zwischen dem Gußstück 1 und dem Restspeiser ist mit 7 bezeichnet.A casting 1 is molded into a sand mold 2. A hollow cylindrical body 3 made of exothermic heating mass is placed on the sand mold 2, which is surrounded by a heat-insulating cover 4 made of asbestos paper and has a conical shape on its underside. The feeder volume 5 has the shape of an elongated cylinder and corresponds to the suction requirement of the casting 1 plus a small safety amount forming a residual feeder 6. The gate area between the casting 1 and the residual feeder is designated 7.

Oberhalb des Restspeisers 6 befindet sich innerhalb des Körpers 3 eine Ringschulter 8, die zur, Abstützung eines Schwimmers 9 'dient, der ebenfalls aus exothermer Heizmasse besteht.-Die Menge der exothermen Heizmasse des Körpers 3 und des Schwimmers 9 ist so gewählt, daß das im Speiser vorhandene Gießgut bis zur Beendigung des Nachsaugens durch das Gußstück flüssig bleibt.Above the residual feeder 6 there is an annular shoulder 8 within the body 3, which serves to support a float 9 ', which also consists of exothermic heating mass. The amount of the exothermic heating mass of the body 3 and the float 9 is chosen so that the The cast material present in the feeder remains liquid until the sucking through the casting has ended.

Der Schwimmer 9 ist dem Querschnitt des Speiservolumens 5 derart angepasst, daß er innerhalb des Körpers 3 mit dem Spiegel des Gießgutes steigen und sinken kann. Wird Gießgut in die leere Sandform 2 eingefüllt, gelangt am Ende des Einfüllvorganges Gießgut auch in den Körper 3 und hebt hierbei den Schwimmer 9 an. Während des Nachsaugvorganges sinkt der Gießgutspiegel im Körper 3, wobei ihm der Schwimmer 9 folgt. Dieser bleibt stets mit dem steigenden und sinkenden Metallspiegel in Kontakt und heizt das darunter liegende Gießgut auf.The float 9 is adapted to the cross section of the feeder volume 5 in such a way that it can rise and fall within the body 3 with the level of the cast material. If poured material is poured into the empty sand mold 2, poured material also enters the body 3 at the end of the filling process and thereby lifts the float 9. During the subsequent suction process, the level of the cast material in the body 3 drops, the float 9 following it. This always remains in contact with the rising and falling metal level and heats up the cast material underneath.

Der Querschnitt des Speiservolumens 5 kann kreisförmig, rechteckig, quadratisch, ringförmig oder dgl. sein.The cross section of the feeder volume 5 can be circular, rectangular, square, ring-shaped or the like.

Der hohlzylinderartige Körper 3 kann durch einen darin eingesetzten, insbesondere platten- oder scheibenförmigen Deckel aus gleichem Werkstoff oben abgedeckt, insbesondere geschlossen sein. Der Schwimmer 9 kann an seiner Unterseite mit einem aus gleichem Werkstoff bestehenden, nach unten ragenden Vorsprung, insbesondere Zapfen, versehen sein, der während des Gießvorganges in das im Speiser befindliche Gießgut und am Ende in den Restspeiser 6 hineinragt.The hollow cylinder-like body 3 can be covered, in particular closed, by a cover made of the same material, in particular plate-shaped or disc-shaped, inserted therein. The float 9 can be provided on its underside with a downward protrusion, in particular a spigot, made of the same material, which protrudes into the cast material in the feeder during the casting process and at the end into the remaining feeder 6.

Claims (2)

1. Speiser für Gußstücke, insbesondere aus Gußeisen, mit einem einen zylindrischen Hohlraum aufweisenden Körper aus einer exothermen Heizmasse,die das im Speiser befindliche Gut bis zur Beendigung des Nachsaugens von Gießgut durch den zu speisenden Gußstückbereich flüssig hält, wobei das Speiservolumen der Größe des Nachsaugvolumens zuzüglich des maximalen Sicherheitsbetrages von 30 % des Nachsaugvolumens entspricht, dadurch gekennzeichnet , daß der zylindrische Hohlraum (5) auf seiner Oberseite nach außen offen ist und daß in diesem Hohlraum ein dessen Querschnitt angepasster und gegenüber dem Körper (3) aus exothermer Heizmasse beweglicher Schwimmer (9) untergebracht ist, der ebenfalls aus einer exothermen Heizmasse besteht.1. Feeder for castings, in particular made of cast iron, with a body having a cylindrical cavity made of an exothermic heating mass, which keeps the material in the feeder liquid until the end of the suction of cast material through the casting area to be fed, the feeder volume being the size of the suction volume plus the maximum safety amount of 30% of the suction volume, characterized in that the cylindrical cavity (5) is open to the outside on its upper side and that in this cavity a cross section adapted to the body (3) and exothermic heating mass movable float ( 9) is housed, which also consists of an exothermic heating mass. 2. Speiser nach Anspruch 1, dadurch gekennzeichnet , daß in den Körper (3) aus exothermer Heizmasse ein Anschlag (8) für die Auflage des Schwimmers vorgesehen ist.2. Feeder according to claim 1, characterized in that a stop (8) is provided for supporting the float in the body (3) from exothermic heating mass.
EP81110682A 1981-03-18 1981-12-22 Feeder head for castings Expired EP0060349B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81110682T ATE19972T1 (en) 1981-03-18 1981-12-22 FEEDERS FOR CASTINGS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3110534A DE3110534C2 (en) 1981-03-18 1981-03-18 Feeder model for castings
DE3110534 1981-03-18

Publications (3)

Publication Number Publication Date
EP0060349A2 true EP0060349A2 (en) 1982-09-22
EP0060349A3 EP0060349A3 (en) 1984-07-25
EP0060349B1 EP0060349B1 (en) 1986-05-28

Family

ID=6127626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110682A Expired EP0060349B1 (en) 1981-03-18 1981-12-22 Feeder head for castings

Country Status (3)

Country Link
EP (1) EP0060349B1 (en)
AT (1) ATE19972T1 (en)
DE (1) DE3110534C2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0202741A2 (en) * 1985-05-17 1986-11-26 Foseco International Limited Molten metal casting and feeder sleeves for use therein
US4749022A (en) * 1986-11-28 1988-06-07 Marie-Therese Simian Foundry gating system
US4907640A (en) * 1986-11-28 1990-03-13 Marie-Therese Simian Foundry gating system
CN110153376A (en) * 2019-06-18 2019-08-23 莒南县友园机械有限公司 A kind of type of heat riser
CN112935191A (en) * 2021-01-28 2021-06-11 共享装备股份有限公司 Air outlet riser

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439450A (en) * 1943-04-14 1948-04-13 Campbell Phillip Casting apparatus compensating for shrinkage of the cast material
US2845667A (en) * 1954-07-22 1958-08-05 Sulzer Ag Molds for casting disc-shaped bodies
FR1351085A (en) * 1963-03-12 1964-01-31 Foundry mold
DE2010337B1 (en) * 1970-03-05 1971-11-25 Rexroth Gmbh G L Exothermic riser for castings

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4861331A (en) * 1971-12-04 1973-08-28

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439450A (en) * 1943-04-14 1948-04-13 Campbell Phillip Casting apparatus compensating for shrinkage of the cast material
US2845667A (en) * 1954-07-22 1958-08-05 Sulzer Ag Molds for casting disc-shaped bodies
FR1351085A (en) * 1963-03-12 1964-01-31 Foundry mold
DE2010337B1 (en) * 1970-03-05 1971-11-25 Rexroth Gmbh G L Exothermic riser for castings

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0202741A2 (en) * 1985-05-17 1986-11-26 Foseco International Limited Molten metal casting and feeder sleeves for use therein
EP0202741A3 (en) * 1985-05-17 1987-07-01 Foseco International Limited Molten metal casting and feeder sleeves for use therein
US4749022A (en) * 1986-11-28 1988-06-07 Marie-Therese Simian Foundry gating system
US4907640A (en) * 1986-11-28 1990-03-13 Marie-Therese Simian Foundry gating system
CN110153376A (en) * 2019-06-18 2019-08-23 莒南县友园机械有限公司 A kind of type of heat riser
CN112935191A (en) * 2021-01-28 2021-06-11 共享装备股份有限公司 Air outlet riser
CN112935191B (en) * 2021-01-28 2023-03-03 共享装备股份有限公司 Air outlet riser

Also Published As

Publication number Publication date
DE3110534A1 (en) 1982-10-28
EP0060349B1 (en) 1986-05-28
EP0060349A3 (en) 1984-07-25
DE3110534C2 (en) 1986-04-17
ATE19972T1 (en) 1986-06-15

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