EP1728570B2 - Feeder having a compliant bottom part - Google Patents

Feeder having a compliant bottom part Download PDF

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Publication number
EP1728570B2
EP1728570B2 EP06011476.6A EP06011476A EP1728570B2 EP 1728570 B2 EP1728570 B2 EP 1728570B2 EP 06011476 A EP06011476 A EP 06011476A EP 1728570 B2 EP1728570 B2 EP 1728570B2
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EP
European Patent Office
Prior art keywords
feeder
volume
mould
insert
base surface
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.)
Not-in-force
Application number
EP06011476.6A
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German (de)
French (fr)
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EP1728570B1 (en
EP1728570A1 (en
Inventor
Jürgen Michael Schäfer
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.)
GTP Schaefer Giesstechnishe Produkte GmbH
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GTP Schaefer Giesstechnishe Produkte GmbH
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Application filed by GTP Schaefer Giesstechnishe Produkte GmbH filed Critical GTP Schaefer Giesstechnishe Produkte GmbH
Priority to PL06011476T priority Critical patent/PL1728570T5/en
Publication of EP1728570A1 publication Critical patent/EP1728570A1/en
Publication of EP1728570B1 publication Critical patent/EP1728570B1/en
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Publication of EP1728570B2 publication Critical patent/EP1728570B2/en
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    • 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

Definitions

  • the invention relates to a feeder insert for insertion into a mold used in the casting of metals, comprising a feeder body having a feeder body of an exothermic and / or insulating material with a lower, the casting forming the forming region of the mold, provided with a bottom opening bottom surface, wherein on the feeder body a relative to the feeder body movable and when forming the feeder insert in the production of the mold via the bottom opening in the feeder volume insertable feeder base, in which one of the formation of the predetermined breaking point is formed for serving itself in the feeder volume with Feiserunterteil feeder remainder feeder opening and the feeder insert with feeder base during manufacture of the mold is attachable to a holding mandrel attached to the model forming the casting mold.
  • a feeder insert with the aforementioned features is in the EP 1 184 104 A1 described.
  • the known riser lower part is first placed on the retaining mandrel or the model during assembly of the feeder insert and has in its upper, the feeder body facing radially projecting retaining projections on which is placed in the assembly of the feeder insert in the mold to be produced, the feeder body and thereon auflagert.
  • the dimensions of feeder body and feeder base are matched to one another such that the feeder base can be inserted into the feeder volume of the feeder body as soon as the compressive force exerted on the feeder body during the production of the casting mold has caused the holding projections to break off from the feeder base.
  • the feeder insert is yielding to the continued pressure exerted form, because the rising on the model riser lower part can slide into the feeder volume of the feeder body.
  • This benefits such as elimination of a Brechkems or waiver of a so-called spring dome are connected.
  • the invention is therefore based on the object, a feeder insert with the generic features in such a way that its assembly is simplified when molding into a mold.
  • the lower part of the feeder is arranged in the ready position before inserting the feeder insert into the mold with upwardly facing bottom surface in the interior of the feeder volume and is movable in such a way that when turning the feeder insert in its position of use with his Forming area of the mold facing bottom surface of the riser lower part with a portion of its longitudinal extent emerges from the feeder volume and the emerged portion in the manufacture of the mold back into the feeder volume can be inserted, and effective on the feeder body in its position of use, the complete falling out of the feeder base from the Suiter volume preventing fuse is formed, wherein the fuse as the cross section of the located in the bottom surface of the feeder body bottom opening after insertion of the Feiserunterteils in the Suitervol
  • the constricting material support is formed, wherein either the material support consists of an adhesive applied to the edge of the bottom opening points or the material support consists of an attached at the edge of the bottom opening circumferential ring of an adhesive or the fuse as in cross section in the bottom surface of the feeder body located bottom opening after
  • the feeder body consisting of feeder body and feeder base can be preassembled in its manufacture by the feeder base is first inserted into the feeder volume of the feeder body and then the backup against falling out of the feeder base from the feeder body to the feeder body is attached.
  • the feeder base slips out of the feeder volume due to its own weight until the fuse formed on the feeder body becomes effective and holds the feeder base. In this mounting position, the feeder insert can be placed on the retaining pin.
  • the feeder lower part can be inserted again into the feeder volume by the same amount of its slipping out, so that the feeder insert as a whole is yielding in the manner known in the prior art.
  • the feeder lower part is designed as a molded body comprising an exothermic and / or insulating material, which has a connecting channel between the feeder volume and the casting mold.
  • the feeder base is completely accommodated in the feeder volume in the ready-to-reach position or the section of the feeder body is surmounted by a section.
  • the safety device is designed as a snap ring inserted into the wall region of the feeder body adjoining the bottom opening, wherein the snap ring may in particular be a snap ring according to DIN 9045.
  • the snap ring is inserted into the feeder body following insertion of the feeder base into the feeder volume and narrows the cross section of the bottom opening such that the feeder base is fixed to the feeder body above it. This is advantageously a very simple assembly of the feeder insert with feeder body and feeder base connected because only the snap ring must be provided and used.
  • the feeder lower part has at least one stop cooperating with the safety device in its region movable in the feeder volume, it being possible to provide that the feeder lower part has a conical section narrowing in the direction of the bottom surface of the feeder body and the stop is formed at the upper edge of the conical section.
  • the centering designs are designed as centering ribs which spring into the connection channel receiving the holding mandrel during manufacture of the casting mandrel and enclose the holding mandrel.
  • the first in FIG. 1 illustrated feeder insert 10 has a feeder body 11, which comprises a feed volume enclosing a wall portion 12, a lid portion 15 and a bottom surface 14.
  • a bottom opening 16 is formed in the bottom surface 14.
  • a blind hole 17 is formed in the opposite lid region 15 for receiving the tip of a retaining pin, as will be described.
  • a feeder base 18 is received, which has a conical portion 19 which narrows in the direction of the bottom opening 16 of the feeder body 11.
  • a radially expanding stop 20 is formed.
  • the lower part of the feeder forms a connecting channel 21, at the end of which the bottom opening 16 of the feeder body 11 faces a feeder opening 27.
  • the connecting channel 21 jump star-shaped centering ribs 22 a.
  • the fuse 23 may for example consist of a circumferential, the edge of the bottom opening 16 widening ring of an adhesive material.
  • FIG. 2 results, the feeder insert according to FIG. 1 initially rotated by 180 degrees during its mounting on the mold to be produced, so that its bottom surface 15 now faces the molding area of the mold.
  • the lower part of the feeder 18 slips out of the feeder volume 10 into a position due to its own weight, in which the feeder lower part 18 is held on the securing 23 of the feeder body 11 via the stop 20 formed on it.
  • the fuse 23 need only be designed so strong that it carries the weight of the lower part 18 of the riser.
  • the feeder insert 10 is placed from a retaining mandrel 24, wherein the retaining mandrel 24 passes through the connecting channel 21 and is surrounded by the centering ribs 22 springing into it.
  • the feeder base 18 and thus the feeder insert 10 is fixed relative to the retaining mandrel 24.
  • the tip 25 of the retaining pin 24 thereby enters into the blind hole 17 formed in the cover region 14 of the feeder body 11.
  • the feeder body 11 is supported by the retaining mandrel 24 so that the protruding from the feeder body 11 chronic portion 19 of the Feiserunterteilils 18 bridges the distance between the model surface and the feeder body 11.
  • FIG. 3 results in this position of the feeder insert 10 of the set 26 is filled in the model box, thereby filling the between the model surface and feeder body 11 existing gap around the feeder base 18 around.
  • the feeder lower part 18 pushes into the feeder volume 13, so that under the action of the mold pressure destruction or impairment of the feeder body 11 is avoided.
  • the tip 25 of the retaining pin 24 pierces the lid portion 14 of the feeder body 11 at the same time forms in the in FIG. 4 illustrated position the feeder lower part 18 in the region of its feed opening 27 after removal of the model plate with holding mandrel 24, the breaking edge in the desired shape.
  • the hot metal can flow through the connecting channel 21 of the riser bottom 18 into the feeder volume 13 or be sucked back from here into the mold.
  • FIGS. 5 and 6 results, instead of the fuse 23 in the form of the ring of an adhesive material in the adjoining the bottom opening 16 wall portion of the feeder body 11, a snap ring 30 are used according to DIN 9045, which takes over the backup of the feeder base used in the feed volume 13 18 when turning the feeder insert , With the use of said snap ring simplification of the assembly is associated insofar as after inserting the Feiserunterteils 18 in the feeder volume 13 of the feeder body 11 only the snap ring 30 is inserted into the region of the bottom opening 16, which is possible without much effort. Since the snap ring 30 equally widens the edge of the bottom opening 16, the cross section of the bottom opening 16 is narrowed, so that upon rotation of the feeder sleeve according to FIG. 5 in the in FIG. 6 shown position the feeder base 13 with its stops 20 auflagert on the snap ring 30 and is held so far.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Feeding Of Articles To Conveyors (AREA)

Abstract

A feeder insert for use in a mould, comprises a body made of an exothermic and/or insulating material, with a lower section, a base with an opening, a holding member, and a lower feed section. The lower feed section (18) is located in a readiness position before it is placed in the mould, with the base (15) at the top. When the insert is rotated, the lower section partly protrudes out of the feeder. A safety member (23) prevents the feeder lower section from falling out.

Description

Die Erfindung betrifft einen Speisereinsatz zum Einsetzen in eine beim Gießen von Metallen verwendete Gießform, bestehend aus einem ein Speiservolumen aufweisenden Speiserkorpus aus einem exothermen und/oder isolierenden Material mit einer unteren, dem das Gußstück ausbildenden Formbereich der Gießform zugewandten, mit einer Bodenöffnung versehenen Bodenfläche, wobei an dem Speiserkorpus ein relativ zum Speiserkorpus bewegliches und beim Aufformen des Speisereinsatzes im Rahmen der Herstellung der Gießform über die Bodenöffnung in das Speiservolumen einschiebbaren Speiserunterteil, in welchem eine der Ausbildung der Sollbruchstelle für einen sich im Speiservolumen mit Speiserunterteil ausbildenden Speiserrest dienende Speiseröffnung ausgebildet ist und der Speisereinsatz mit Speiserunterteil beim Herstellen der Gießform auf einen an dem die Form des Gussstücks ausbildenden Modell befestigten Haltedorn aufsteckbar ist.The invention relates to a feeder insert for insertion into a mold used in the casting of metals, comprising a feeder body having a feeder body of an exothermic and / or insulating material with a lower, the casting forming the forming region of the mold, provided with a bottom opening bottom surface, wherein on the feeder body a relative to the feeder body movable and when forming the feeder insert in the production of the mold via the bottom opening in the feeder volume insertable feeder base, in which one of the formation of the predetermined breaking point is formed for serving itself in the feeder volume with Feiserunterteil feeder remainder feeder opening and the feeder insert with feeder base during manufacture of the mold is attachable to a holding mandrel attached to the model forming the casting mold.

Ein Speisereinsatz mit den vorgenannten Merkmalen ist in der EP 1 184 104 A1 beschrieben. Das daraus bekannte Speiserunterteil wird bei der Montage des Speisereinsatzes zunächst auf den Haltedorn beziehungsweise das Modell aufgesetzt und weist in seinem oberen, dem Speiserkorpus zugewandten Bereich radial abstehende Haltevorsprünge auf, auf die bei der Montage des Speisereinsatzes in die herzustellende Gießform der Speiserkorpus aufgesetzt wird und darauf auflagert. Die Abmessungen von Speiserkorpus und Speiserunterteil sind dabei derart aufeinander abgestimmt, dass das Speiserunterteil in das Speiservolumen des Speiserkorpus einschiebbar ist, sobald die bei der Herstellung der Gießform auf den Speiserkorpus ausgeübte Druckkraft das Abbrechen der Haltevorsprünge von dem Speiserunterteil bewirkt hat. Im Anschluss daran ist der Speisereinsatz gegenüber dem weiterhin ausgeübten Formdruck nachgiebig, weil sich der auf dem Modell aufstehende Speiserunterteil in das Speiservolumen des Speiserkorpus einschieben kann. Hiermit sind Vorteile wie Wegfall eines Brechkems oder Verzicht auf einen sogenannten Federdom verbunden.A feeder insert with the aforementioned features is in the EP 1 184 104 A1 described. The known riser lower part is first placed on the retaining mandrel or the model during assembly of the feeder insert and has in its upper, the feeder body facing radially projecting retaining projections on which is placed in the assembly of the feeder insert in the mold to be produced, the feeder body and thereon auflagert. The dimensions of feeder body and feeder base are matched to one another such that the feeder base can be inserted into the feeder volume of the feeder body as soon as the compressive force exerted on the feeder body during the production of the casting mold has caused the holding projections to break off from the feeder base. Following this, the feeder insert is yielding to the continued pressure exerted form, because the rising on the model riser lower part can slide into the feeder volume of the feeder body. This benefits such as elimination of a Brechkems or waiver of a so-called spring dome are connected.

In der nicht vorveröffentlichten älteren EP-Anmeldung 1 850 987 ( WO 20061089699 A1 ) ist ein gattungsgemäßer Speisereinsatz offenbart.In the not previously published older EP Application 1 850 987 ( WO 20061089699 A1 ) discloses a generic feeder insert.

Als Nachteil ist bei dem bekannten Speisereinsatz noch zu vermerken, dass der mit zwei getrennten Teilen ausgebildete, aus Speiserkorpus und Speiserunterteil bestehende Speisereinsatz bei dessen Einbringen in die Gießform umständlich zu handhaben ist, so dass ein erheblicher Montageaufwand besteht.A disadvantage is still noted in the known feeder insert that formed with two separate parts, consisting of feeder body and feeder base feeder insert is awkward to handle when it is introduced into the mold, so that there is a considerable installation effort.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Speisereinsatz mit den gattungsgemäßen Merkmalen so auszugestalten, dass seine Montage beim Aufformen in eine Gießform vereinfacht ist.The invention is therefore based on the object, a feeder insert with the generic features in such a way that its assembly is simplified when molding into a mold.

Die Lösung dieser Aufgabe ergibt sich einschließlich vorteilhafter Ausgestaltungen und Weiterbildungen der Erfindung aus dem Inhalt der Patentansprüche, welche dieser Beschreibung nachgestellt sind.The solution to this problem arises, including advantageous refinements and developments of the invention from the content of the claims, which are adjusted to this description.

Die Erfindung sieht in unterschiedlichen ersten Ausführungsformen vor, das das Speiserunterteil in der Bereithaltestellung vor dem Einsetzen des Speisereinsatzes in die Gießform bei nach oben weisender Bodenfläche im Inneren des Speiservolumens angeordnet und darin derart beweglich ist, dass beim Drehen des Speisereinsatzes in seine Gebrauchsstellung mit seiner dem Formbereich der Gießform zugewandten Bodenfläche das Speiserunterteil mit einem Teilbereich seiner Längserstreckung aus dem Speiservolumen heraustritt und über den herausgetretenen Teilbereich beim Herstellen der Gießform wieder in das Speiservolumen einschiebbar ist, und das an dem Speiserkorpus eine in seiner Gebrauchsstellung wirksame, das vollständige Herausfallen des Speiserunterteils aus dem Speiservolumen verhindernde Sicherung ausgebildet ist, wobei die Sicherung als den Querschnitt der in der Bodenfläche des Speiserkorpus befindlichen Bodenöffnung nach dem Einsetzen des Speiserunterteils in das Speiservolumen verengende Materialauflage ausgebildet ist, wobei entweder die Materialauflage aus an dem Rand der Bodenöffnung angesetzten Punkten aus einem Klebstoff besteht oder die Materialauflage aus einem an dem Rand der Bodenöffnung angesetzten umlaufenden Ring aus einem Klebstoff besteht oder die Sicherung als in Querschnitt der in der Bodenfläche des Speiserkorpus befindlichen Bodenöffnung nach dem Einsetzen des Speiserunterteils in das Speiservolumen verengende, in die Bodenfläche eingebrachte Grate ausgebildet ist.The invention provides in different first embodiments, the lower part of the feeder is arranged in the ready position before inserting the feeder insert into the mold with upwardly facing bottom surface in the interior of the feeder volume and is movable in such a way that when turning the feeder insert in its position of use with his Forming area of the mold facing bottom surface of the riser lower part with a portion of its longitudinal extent emerges from the feeder volume and the emerged portion in the manufacture of the mold back into the feeder volume can be inserted, and effective on the feeder body in its position of use, the complete falling out of the feeder base from the Speiser volume preventing fuse is formed, wherein the fuse as the cross section of the located in the bottom surface of the feeder body bottom opening after insertion of the Feiserunterteils in the Speiservol The constricting material support is formed, wherein either the material support consists of an adhesive applied to the edge of the bottom opening points or the material support consists of an attached at the edge of the bottom opening circumferential ring of an adhesive or the fuse as in cross section in the bottom surface of the feeder body located bottom opening after insertion of the Feiserunterteils in the feeder volume narrowing, introduced into the bottom surface ridges is formed.

Mit der Erfindung ist der Vorteil verbunden, dass der aus Speiserkorpus und Speiserunterteil bestehende Speisereinsatz im Rahmen seiner Herstellung vormontiert werden kann, indem das Speiserunterteil zunächst in das Speiservolumen des Speiserkorpus eingesetzt wird und danach die Sicherung gegen ein Herausfallen des Speiserunterteils aus dem Speiservolumen an dem Speiserkorpus angebracht wird. Insofern kann bei der Montage der Speisereinsatz in vorteilhafter Weise als ein Bauteil gehandhabt werden; wobei beim Herumdrehen des Speisereinsatzes in seine Gebrauchsstellung, in welcher der Speisereinsatz in eine mit seiner Bodenfläche zugewandte Lage gedreht ist, dass Speiserunterteil aufgrund seines Eigengewichts aus dem Speiservolumen soweit herausrutscht, bis die am Speiserkorpus ausgebildete Sicherung wirksam wird und das Speiserunterteil festhält. In dieser Montagestellung kann der Speisereinsatz auf den Haltedorn aufgesetzt werden. Wird nun nach dem Einfüllen des Formsandes der entsprechende Formdruck ausgeübt, so ist das Speiserunterteil um den gleichen Betrag seines Herausrutschens wieder in das Speiservolumen einschiebbar, so dass der Speisereinsatz insgesamt in der im Stand der Technik bekannten Weise nachgiebig ist.With the invention has the advantage that the feeder body consisting of feeder body and feeder base can be preassembled in its manufacture by the feeder base is first inserted into the feeder volume of the feeder body and then the backup against falling out of the feeder base from the feeder body to the feeder body is attached. In this respect, can be handled in an advantageous manner as a component during assembly of the feeder insert; wherein when turning the feeder insert into its position of use in which the feeder insert is turned into a position facing its bottom surface, the feeder base slips out of the feeder volume due to its own weight until the fuse formed on the feeder body becomes effective and holds the feeder base. In this mounting position, the feeder insert can be placed on the retaining pin. Now, if the corresponding molding pressure is exerted after filling the molding sand, the feeder lower part can be inserted again into the feeder volume by the same amount of its slipping out, so that the feeder insert as a whole is yielding in the manner known in the prior art.

Nach einem Ausführungsbeispiel der Erfindung ist vorgesehen, dass das Speiserunterteil als ein einen Verbindungskanal zwischen Speiservolumen und Gießform aufweisender Formkörper aus einem exothermen und/oder isolierenden Material ausgebildet ist.According to one embodiment of the invention, it is provided that the feeder lower part is designed as a molded body comprising an exothermic and / or insulating material, which has a connecting channel between the feeder volume and the casting mold.

Je nach Auslegung und Abmessung von Speiserkorpus und Speiserunterteil kann in alternativen Ausführungsbeispielen der Erfindung vorgesehen sein, dass das Speiserunterteil in der Bereithaltestellung vollständig in dem Speiservolumen aufgenommen ist oder aber die Bodenfläche des Speiserkorpus mit einem Abschnitt überragt.Depending on the design and dimensions of the feeder body and feeder base, it can be provided in alternative embodiments of the invention that the feeder base is completely accommodated in the feeder volume in the ready-to-reach position or the section of the feeder body is surmounted by a section.

In allen obigen Fällen wird nach dem Einsetzen des Speiserunterteils in das Speiservolumen des Speiserkorpus im Rahmen der Vormontage des Speisereinsatzes die den Querschnitt der Bodenöffnung verengende Sicherung eingebracht, so dass darüber das Speiserunterteil an dem Speiserkorpus fixiert ist.In all the above cases, after the insertion of the feeder lower part into the feeder volume of the feeder body during the pre-assembly of the feeder insert, the fuse narrowing the cross-section of the bottom opening is introduced, so that above the feeder base is fixed to the feeder body.

In einer wiederum alternativen Ausführungsform der Erfindung ist die Sicherung als ein in den an die Bodenöffnung anschließenden Wandungsbereich des Speiserkorpus eingesetzter Sprengring ausgebildet, wobei es sich bei dem Sprengring insbesondere um einen Sprengring nach DIN 9045 handeln kann. In gleicher Weise wie zu dem Einbringen der Materialauflage beschrieben, wird im Anschluss an das Einsetzen des Speiserunterteils in das Speiservolumen der Sprengring in den Speiserkorpus eingesetzt und verengt den Querschnitt der Bodenöffnung so, dass darüber das Speiserunterteil an dem Speiserkorpus fixiert ist. Hiermit ist in vorteilhafter Weise eine sehr einfache Montage des Speisereinsatzes mit Speiserkorpus und Speiserunterteil verbunden, weil nur der Sprengring beigestellt und eingesetzt werden muss.In yet another alternative embodiment of the invention, the safety device is designed as a snap ring inserted into the wall region of the feeder body adjoining the bottom opening, wherein the snap ring may in particular be a snap ring according to DIN 9045. In the same way as described for the introduction of the material support, the snap ring is inserted into the feeder body following insertion of the feeder base into the feeder volume and narrows the cross section of the bottom opening such that the feeder base is fixed to the feeder body above it. This is advantageously a very simple assembly of the feeder insert with feeder body and feeder base connected because only the snap ring must be provided and used.

Nach einem Ausführungsbeispiel der Ereindung ist vorgesehen, dass das Speiserunterteil in seinem in dem Speiservolumen beweglichen Bereich wenigstens einen mit der Sicherung zusammenwirkenden Anschlag aufweist, wobei vorgesehen sein kann, dass das Speiserunterteil einen sich in Richtung zur Bodenfläche des Speiserkorpus verengenden konischen Abschnitt aufweist und der Anschlag am oberen Rand des konischen Abschnitts ausgebildet ist.According to an exemplary embodiment of the invention, it is provided that the feeder lower part has at least one stop cooperating with the safety device in its region movable in the feeder volume, it being possible to provide that the feeder lower part has a conical section narrowing in the direction of the bottom surface of the feeder body and the stop is formed at the upper edge of the conical section.

Soweit es aufgrund der Relativbeweglichkeit von Speiserunterteil zu Speiserkorpus vorteilhaft ist, für eine Fixierung der Bauteile während des Eindringens in die herzustellende Gießform zu sorgen, ist nach einem Ausführungsbeispiel der Erfindung vorgesehen, dass an dem Speiserunterteil das Speiserunterteil gegenüber dem Haltedorn fixierenden Zentriergestaltungen ausgebildet sind. Hierzu kann im Einzelnen vorgesehen sein, dass die Zentriergestaltungen als in den bei der Herstellung der Gießform den Haltedorn aufnehmenden Verbindungskanal einspringende und den Haltedorn umschließende Zentrierrippen ausgebildet sind.As far as it is advantageous due to the relative mobility of feeder base to feeder body, to provide for a fixation of the components during penetration into the mold to be produced, according to an embodiment of the invention is provided that are formed on the feeder base the feeder base relative to the retaining pin fixing centering. For this purpose, it may be provided in detail that the centering designs are designed as centering ribs which spring into the connection channel receiving the holding mandrel during manufacture of the casting mandrel and enclose the holding mandrel.

In der Zeichnung sind Ausführungsbeispiele der Erfindung vorgesehen, welche nachstehend beschrieben sind. Es zeigen:

  • Fig. 1 einen aus Speiserkorpus und Speiserunterteil bestehenden Speisereinsatz in der Bereithaltestellung,
  • Fig. 2 den Speisereinsatz gemäß Figur 1 beim Aufsetzen auf den Haltedorn zur Herstellung der Gießform,
  • Fig. 3 den Speisereinsatz gemäß Figur 2 nach dem Einfüllen des Formsandes in den Modellkasten,
  • Fig. 4 den Speisereinsatz gemäß Figur 3 nach dem Verdichten des Formsandes,
  • Fig. 5 einen Speisereinsatz gemäß Figur 1 in einer hinsichtlich der Sicherung für das Speiserunterteil abgeänderten Ausführungsform,
  • Fig. 6 den Speisereinsatz gemäß Figur 5 in einer Funktionsdarstellung entsprechend Figur 2.
In the drawings, embodiments of the invention are provided, which are described below. Show it:
  • Fig. 1 a feeder insert consisting of feeder body and feeder base in the standby position,
  • Fig. 2 according to the feeder insert FIG. 1 when placed on the retaining mandrel for the production of the casting mold,
  • Fig. 3 according to the feeder insert FIG. 2 after filling the molding sand into the model box,
  • Fig. 4 according to the feeder insert FIG. 3 after compaction of the molding sand,
  • Fig. 5 a feeder insert according to FIG. 1 in an embodiment modified with regard to the fuse for the lower part of the feeder,
  • Fig. 6 according to the feeder insert FIG. 5 in a functional representation accordingly FIG. 2 ,

Der zunächst in Figur 1 dargestellte Speisereinsatz 10 weist einen Speiserkorpus 11 auf, der einen ein Speiservolumen 13 umschließenden Wandbereich 12, einen Deckelbereich 15 sowie eine Bodenfläche 14 umfasst. In der Bodenfläche 14 ist eine Bodenöffnung 16 ausgebildet. In dem gegenüberliegenden Deckelbereich 15 befindet sich ein Sackloch 17 zur Aufnahme der Spitze eines Haltedorns, wie noch beschrieben werden wird.The first in FIG. 1 illustrated feeder insert 10 has a feeder body 11, which comprises a feed volume enclosing a wall portion 12, a lid portion 15 and a bottom surface 14. In the bottom surface 14, a bottom opening 16 is formed. In the opposite lid region 15 is a blind hole 17 for receiving the tip of a retaining pin, as will be described.

In dem Speiservolumen 13 des Speisereinsatzes gemäß Figur 1 ist ein Speiserunterteil 18 aufgenommen, welches einen konischen Abschnitt 19 aufweist, der sich in Richtung der Bodenöffnung 16 des Speiserkorpus 11 verengt. An dem in der Darstellung der Figur 1 unteren Rand des konischen Abschnitts 19 ist ein sich radial erweiternder Anschlag 20 ausgebildet. In seinem Inneren bildet das Speiserunterteil einen Verbindungskanal 21 aus, an dessen der Bodenöffnung 16 des Speiserkorpus 11 zugewandten Ende eine Speiseröffnung 27 besteht. In den Verbindungskanal 21 springen sternförmig Zentrierrippen 22 ein. Schließlich ist an dem äußeren, umlaufenden Rand der Bodenfläche 15 - nach dem Einsetzen des Speiserunterteils 18 in das Speiservolumen 13 - eine Sicherung 23 angebracht, die den Querschnitt der Bodenöffnung 16 derart verengt, dass der Speiserunterteil 18 nicht mehr aus dem Speiservolumen 13 entnommen werden kann, weil dessen Anschlag 20 von der Sicherung 23 gehalten wird. Im Einzelnen kann die Sicherung 23 beispielsweise aus einem umlaufenden, den Rand der Bodenöffnung 16 erweiternden Ring aus einem Klebstoffmaterial bestehen.In the feeder volume 13 of the feeder according to FIG. 1 a feeder base 18 is received, which has a conical portion 19 which narrows in the direction of the bottom opening 16 of the feeder body 11. At the in the representation of FIG. 1 bottom edge of the conical portion 19 is a radially expanding stop 20 is formed. In its interior, the lower part of the feeder forms a connecting channel 21, at the end of which the bottom opening 16 of the feeder body 11 faces a feeder opening 27. In the connecting channel 21 jump star-shaped centering ribs 22 a. Finally, at the outer, circumferential edge of the bottom surface 15 - after insertion of the riser 18 in the feeder volume 13 - a fuse 23 is attached, which narrows the cross-section of the bottom opening 16 such that the feeder base 18 is no longer from the feeder volume 13 can be removed because the stop 20 is held by the fuse 23. Specifically, the fuse 23 may for example consist of a circumferential, the edge of the bottom opening 16 widening ring of an adhesive material.

Wie sich aus Figur 2 ergibt, wird der Speisereinsatz gemäß Figur 1 bei seiner Montage an der herzustellenden Gießform zunächst um 180 Grad gedreht, so dass seine Bodenfläche 15 nunmehr dem Formbereich der Gießform zugewandt ist. Im Zuge dieser Drehbewegung rutscht das Speiserunterteil 18 aufgrund seines Eigengewichts aus dem Speiservolumen 10 bis in eine Stellung heraus, in welcher das Speiserunterteil 18 über den an ihm ausgebildeten Anschlag 20 an der Sicherung 23 des Speiserkorpus 11 gehalten ist. Insofern braucht die Sicherung 23 nur so stark ausgebildet sein, dass sie das Eigengewicht des Speiserunterteils 18 trägt. In dieser Stellung wird der Speisereinsatz 10 aus einen Haltedorn 24 aufgesetzt, wobei der Haltedorn 24 durch den Verbindungskanal 21 hindurch tritt und von den da hinein einspringenden Zentrierrippen 22 umschlossen wird. Auf diese wird das Speiserunterteil 18 und damit der Speisereinsatz 10 gegenüber dem Haltedorn 24 fixiert. Die Spitze 25 des Haltedorns 24 tritt dabei in das im Deckelbereich 14 des Speiserkorpus 11 ausgebildetes Sackloch 17 ein. Somit wird der Speiserkorpus 11 von dem Haltedorn 24 getragen, so dass der aus dem Speiserkorpus 11 herausstehende chronische Abschnitt 19 des Speiserunterteils 18 den Abstand zwischen der Modelloberfläche und dem Speiserkorpus 11 überbrückt.As it turned out FIG. 2 results, the feeder insert according to FIG. 1 initially rotated by 180 degrees during its mounting on the mold to be produced, so that its bottom surface 15 now faces the molding area of the mold. In the course of this rotational movement, the lower part of the feeder 18 slips out of the feeder volume 10 into a position due to its own weight, in which the feeder lower part 18 is held on the securing 23 of the feeder body 11 via the stop 20 formed on it. In this respect, the fuse 23 need only be designed so strong that it carries the weight of the lower part 18 of the riser. In this position, the feeder insert 10 is placed from a retaining mandrel 24, wherein the retaining mandrel 24 passes through the connecting channel 21 and is surrounded by the centering ribs 22 springing into it. In this the feeder base 18 and thus the feeder insert 10 is fixed relative to the retaining mandrel 24. The tip 25 of the retaining pin 24 thereby enters into the blind hole 17 formed in the cover region 14 of the feeder body 11. Thus, the feeder body 11 is supported by the retaining mandrel 24 so that the protruding from the feeder body 11 chronic portion 19 of the Feiserunterteilils 18 bridges the distance between the model surface and the feeder body 11.

Wie sich aus Figur 3 ergibt, wird in dieser Stellung des Speisereinsatzes 10 der Formsatz 26 in dem Modellkasten eingefüllt und füllt dabei den zwischen Modelloberfläche und Speiserkorpus 11 bestehenden Zwischenraum um das Speiserunterteil 18 herum aus.As it turned out FIG. 3 results in this position of the feeder insert 10 of the set 26 is filled in the model box, thereby filling the between the model surface and feeder body 11 existing gap around the feeder base 18 around.

Soweit nach dem Einfüllen des Formsandes gemäß Figur 3 die Verdichtung des Formsandes erfolgt, schiebt sich das Speiserunterteil 18 in das Speiservolumen 13 ein, so dass unter der Einwirkung des Formdruckes eine Zerstörung beziehungsweise Beeinträchtigung des Speiserkorpus 11 vermieden ist. Hierbei durchstößt die Spitze 25 des Haltedorns 24 den Deckelbereich 14 des Speiserkorpus 11. Gleichzeitig bildet in der in Figur 4 dargestellten Stellung das Speiserunterteil 18 im Bereich seiner Speiseröffnung 27 nach Entfernen der Modellplatte mit Haltedorn 24 die Brechkante in der gewünschten Form aus. Beim Abgießen des Gußstückes kann demnach das heiße Metall durch den Verbindungskanal 21 des Speiseruntertells 18 bis in das Speiservolumen 13 strömen beziehungsweise von hier aus in die Gießform rückgesaugt werden.As far as after filling the molding sand according to FIG. 3 the compaction of the molding sand takes place, the feeder lower part 18 pushes into the feeder volume 13, so that under the action of the mold pressure destruction or impairment of the feeder body 11 is avoided. Here, the tip 25 of the retaining pin 24 pierces the lid portion 14 of the feeder body 11 at the same time forms in the in FIG. 4 illustrated position the feeder lower part 18 in the region of its feed opening 27 after removal of the model plate with holding mandrel 24, the breaking edge in the desired shape. When pouring the casting, therefore, the hot metal can flow through the connecting channel 21 of the riser bottom 18 into the feeder volume 13 or be sucked back from here into the mold.

Wie sich aus Figuren 5 und 6 ergibt, kann anstelle der Sicherung 23 in Form des Ringes aus einem Klebstoffmaterial in den an die Bodenöffnung 16 anschließenden Wandungsbereich des Speiserkorpus 11 ein Sprengring 30 gemäß DIN 9045 eingesetzt werden, der die Sicherung des in das Speiservolumen 13 eingesetzten Speiserunterteils 18 beim Drehen des Speisereinsatzes übernimmt. Mit der Verwendung des genannten Sprengringes ist eine Vereinfachung der Montage insoweit verbunden, als nach dem Einsetzen des Speiserunterteils 18 in das Speiservolumen 13 des Speiserkorpus 11 lediglich noch der Sprengring 30 in den Bereich der Bodenöffnung 16 einzusetzen ist, was ohne großen Aufwand möglich ist. Da der Sprengring 30 gleichermaßen den Rand der Bodenöffnung 16 erweitert, wird der Querschnitt der Bodenöffnung 16 verengt, so dass bei dem Drehen des Speisereinsatzes gemäß Figur 5 in die in Figur 6 dargestellte Position das Speiserunterteil 13 mit seinen Anschlägen 20 auf den Sprengring 30 auflagert und insoweit gehalten ist.As it turned out FIGS. 5 and 6 results, instead of the fuse 23 in the form of the ring of an adhesive material in the adjoining the bottom opening 16 wall portion of the feeder body 11, a snap ring 30 are used according to DIN 9045, which takes over the backup of the feeder base used in the feed volume 13 18 when turning the feeder insert , With the use of said snap ring simplification of the assembly is associated insofar as after inserting the Feiserunterteils 18 in the feeder volume 13 of the feeder body 11 only the snap ring 30 is inserted into the region of the bottom opening 16, which is possible without much effort. Since the snap ring 30 equally widens the edge of the bottom opening 16, the cross section of the bottom opening 16 is narrowed, so that upon rotation of the feeder sleeve according to FIG. 5 in the in FIG. 6 shown position the feeder base 13 with its stops 20 auflagert on the snap ring 30 and is held so far.

Die in der vorstehenden Beschreibung, den Patentansprüchen, der Zusammenfassung und der Zeichnung offenbarten Merkmale des Gegenstandes dieser Unterlagen können einzeln als auch in beliebigen Kombinationen untereinander für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein.The features disclosed in the foregoing description, the claims, the abstract and the drawings of the subject matter of these documents may be essential individually or in any combination with each other for the realization of the invention in its various embodiments.

Claims (11)

  1. Feeder insert for insertion into a mould used for casting metal, consisting of a feeder body having a feeder volume, the feeder body being made of an exothermic and/or insulating material and having a lower base surface facing the moulding region of the mould which forms the casting and in which base surface a base opening is provided, the feeder body having a feeder lower part positioned thereon, and which is movable relative thereto and which can be inserted into the feeder volume via the base opening when forming the feeder insert during the process of producing the mould, in which lower part a feeder opening is formed, promoting the formation of a predetermined breaking point for a feeder residue formed in the feeder volume comprising the feeder lower part and in which, during production of the mould, the feeder insert comprising the feeder lower part may be attached to a holding mandrel fixed to a pattern forming the shape of the casting, characterised in that, in the stand-by position, before the feeder insert (10) is inserted into the mould, with the base surface (15) facing upward, the feeder lower part (18) is arranged in the interior of the feeder volume (13) and is movable therein in such a way that on rotation of the feeder insert to its operational position, with its base surface (15) facing the moulding region of the mould, a portion of the length of the feeder lower part (18) protrudes from the feeder volume (13) and may be reinserted into the feeder volume (13) by means of the protruding portion during production of the mould, and in that a securing means (23, 30), which is effective in the operational position of the feeder body, is formed on the feeder body (11), to prevent the feeder lower part (18) from completely falling out of the feeder volume (13), whereby the securing means is configured as a material seat (23) narrowing the cross-section of the base opening (16) located in the base surface (15) of the feeder body (11) after the insertion of the feeder lower part (18) into the feeder volume (13) and the material seat (23) consists of adhesive points attached to the edge of the base opening (16).
  2. Feeder insert for insertion into a mould used for casting metal, consisting of a feeder body having a feeder volume, the feeder body being made of an exothermic and/or insulating material and having a lower base surface facing the moulding region of the mould which forms the casting and in which base surface a base opening is provided, the feeder body having a feeder lower part positioned thereon, and which is movable relative thereto and which can be inserted into the feeder volume via the base opening when forming the feeder insert during the process of producing the mould, in which lower part a feeder opening is formed, promoting the formation of a predetermined breaking point for a feeder residue formed in the feeder volume comprising the feeder lower part and in which, during production of the mould, the feeder insert comprising the feeder lower part may be attached to a holding mandrel fixed to a pattern forming the shape of the casting, characterised in that, in the stand-by position, before the feeder insert (10) is inserted into the mould, with the base surface (15) facing upward, the feeder lower part (18) is arranged in the interior of the feeder volume (13) and is movable therein in such a way that on rotation of the feeder insert to its operational position, with its base surface (15) facing the moulding region of the mould, a portion of the length of the feeder lower part (18) protrudes from the feeder volume (13) and may be reinserted into the feeder volume (13) by means of the protruding portion during production of the mould, and in that a securing means (23, 30), which is effective in the operational position of the feeder body, is formed on the feeder body (11) to prevent the feeder lower part (18) from completely falling out of the feeder volume (13) whereby the securing means is configured as a material seat (23) narrowing the cross-section of the base opening (16) located in the base surface (15) of the feeder body (11) after the insertion of the feeder lower part (18) into the feeder volume (13) and the material seat (23) consists of a peripheral adhesive ring attached to the edge of the base opening (16).
  3. Feeder insert for insertion into a mould used for casting metal, consisting of a feeder body having a feeder volume, the feeder body being made of an exothermic and/or insulating material and having a lower base surface facing the moulding region of the mould which forms the casting and in which base surface a base opening is provided, the feeder body having a feeder lower part positioned thereon, and which is movable relative thereto and which can be inserted into the feeder volume via the base opening when forming the feeder insert during the process of producing the mould, in which lower part a feeder opening is formed, promoting the formation of a predetermined breaking point for a feeder residue formed in the feeder volume comprising the feeder lower part and in which, during production of the mould, the feeder insert comprising the feeder lower part may be attached to a holding mandrel fixed to a pattern forming the shape of the casting, characterised in that, in the stand-by position, before the feeder insert (10) is inserted into the mould, with the base surface (15) facing upward, the feeder lower part (18) is arranged in the interior of the feeder volume (13) and is movable therein in such a way that on rotation of the feeder insert to its operational position, with its base surface (15) facing the moulding region of the mould, a portion of the length of the feeder lower part (18) protrudes from the feeder volume (13) and may be reinserted into the feeder volume (13) by means of the protruding portion during production of the mould, and in that a securing means (23, 30), which is effective in the operational position of the feeder body, is formed on the feeder body (11), to prevent the feeder lower part (18) from completely falling out of the feeder volume (13) whereby the securing means is configured as a material seat (23) narrowing the cross-section of the base opening (16) located in the base surface (15) of the feeder body (11) after the insertion of the feeder lower part (18) into the feeder volume (13) and the securing means is configured as ridges which are introduced into the base surface (15) and narrow in the cross-section of the base opening (16), located in the base surface (15) of the feeder body (11), after the insertion of the feeder lower part (18) into the feeder volume (13).
  4. Feeder insert for insertion into a mould used for casting metal, consisting of a feeder body having a feeder volume, the feeder body being made of an exothermic and/or insulating material and having a lower base surface facing the moulding region of the mould which forms the casting and in which base surface a base opening is provided, the feeder body having a feeder lower part positioned thereon, and which is movable relative thereto and which can be inserted into the feeder volume via the base opening when forming the feeder insert during the process of producing the mould, in which lower part a feeder opening is formed, promoting the formation of a predetermined breaking point for a feeder residue formed in the feeder volume comprising the feeder lower part and in which, during production of the mould, the feeder insert comprising the feeder lower part may be attached to a holding mandrel fixed to a pattern forming the shape of the casting, characterised in that, in the stand-by position, before the feeder insert (10) is inserted into the mould, with the base surface (15) facing upward, the feeder lower part (18) is arranged in the interior of the feeder volume (13) and is movable therein in such a way that on rotation of the feeder insert to its operational position, with its base surface (15) facing the moulding region of the mould, a portion of the length of the feeder lower part (18) protrudes from the feeder volume (13) and may be reinserted into the feeder volume (13) by means of the protruding portion during production of the mould, and in that a securing means (23, 30), which is effective in the operational position of the feeder body, is formed on the feeder body (11), to prevent the feeder lower part (18) from completely falling out of the feeder volume (13), whereby the securing means is configured as a retaining ring (30) inserted into the wall region of the feeder body (11) adjacent to the base opening (16).
  5. Feeder insert according to one of the claims 1 - 4, characterised in that the feeder lower part (18) is configured as a shaped body having a connecting channel (21) between the feeder volume (13) and the mould and is made of an exothermic and/or insulating material.
  6. Feeder insert according to one of the claims 1 - 5, characterised in that, in the standby position, the feeder lower part (18) is completely accommodated in the feeder volume (13) of the feeder body (11)
  7. Feeder insert according to one of the claims 1 - 5, characterised in that, in the standby position, the feeder lower part (18) protrudes from the base surface (15) of the feeder body (11)
  8. Feeder insert according to one of claims 1 to 7, characterised in that the feeder lower part (18) has at least one stop (20) cooperating with the securing means (23) in the region of the feeder lower part which can be moved in the feeder volume (13).
  9. Feeder insert according to one of claims 1 to 8, characterised in that the feeder lower part (18) has a conical portion (19) which narrows in the direction of the base surface (15) of the feeder body (11), and the stop (20) is configured at the upper edge of the conical portion (19)
  10. Feeder insert according to one of claims 1 to 9, characterised in that, centring configurations (22), fixing the feeder lower part (18) relative to the holding mandrel (24), are formed on the feeder lower part (18).
  11. Feeder insert according to claim 10, characterised in that the centring configurations are configured as centring ribs (22) which project into the connecting channel accommodating the holding mandrel (24) during production of the mould and which surround the holding mandrel (24)
EP06011476.6A 2005-06-04 2006-06-02 Feeder having a compliant bottom part Not-in-force EP1728570B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06011476T PL1728570T5 (en) 2005-06-04 2006-06-02 Feeder having a compliant bottom part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005025701A DE102005025701B4 (en) 2005-06-04 2005-06-04 Feeder with yielding feeder base

Publications (3)

Publication Number Publication Date
EP1728570A1 EP1728570A1 (en) 2006-12-06
EP1728570B1 EP1728570B1 (en) 2007-07-11
EP1728570B2 true EP1728570B2 (en) 2014-06-18

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Family Applications (1)

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EP06011476.6A Not-in-force EP1728570B2 (en) 2005-06-04 2006-06-02 Feeder having a compliant bottom part

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EP (1) EP1728570B2 (en)
AT (1) ATE366629T1 (en)
DE (2) DE102005025701B4 (en)
ES (1) ES2290932T5 (en)
PL (1) PL1728570T5 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049734A1 (en) * 2005-10-14 2007-04-26 Hofmann Ceramic Gmbh Feeder insert for placement in a mold used in the casting of metals
EP1920859A1 (en) * 2006-10-31 2008-05-14 GTP-Schäfer Giesstechnische Produkte GmbH Two part feeder insert having a compliant bottom part
DE202007005575U1 (en) * 2007-04-18 2007-06-14 GTP Schäfer Gießtechnische Produkte GmbH Feeder head insert for metal casting molds has tubular upper section and tapering lower section which is fitted at its tip with tapering metal ring
EP2659996B1 (en) * 2012-04-30 2015-04-15 Foseco International Limited Feeder sleeve
WO2019083480A2 (en) * 2017-09-28 2019-05-02 Cukurova Kimya Endustrisi A.S. Fixing system for a feeder sleeve
TR201716582A2 (en) * 2017-10-26 2019-05-21 Cukurova Kimya Enduestrisi A S Feeder shirt fixing system.
CN109226692A (en) * 2018-11-16 2019-01-18 衡阳博思科技有限公司 A kind of environment-friendly type aluminium hot melt shaping equipment
DE102020132342A1 (en) 2020-12-04 2022-06-09 Chemex Foundry Solutions Gmbh Feeder sleeve for use in casting metals in moulds

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10039519B4 (en) * 2000-08-08 2007-05-31 Chemex Gmbh feeder sleeve
DE20115140U1 (en) * 2000-11-30 2002-01-31 Luengen Gmbh & Co Kg As Feeder with a tubular body
DE20118763U1 (en) * 2001-11-20 2003-01-02 Gtp Schaefer Giestechnische Pr Feeder insert used in metal casting for inserting in a casting mold comprises a feeder body and a hat-shaped feeder cap surrounding the outer wall of the feeder body under the formation of an insulating gap
DE10156571C1 (en) * 2001-11-20 2003-01-16 Gtp Schaefer Giestechnische Pr Feeder, used for inserting into a casting mold for casting metals, comprises a hat-like cap enclosing the outer wall of a feeder body forming an insulating gap and fixed against the body
DE102005008324A1 (en) 2005-02-23 2006-08-24 AS Lüngen GmbH & Co. KG Cast metal feeder having feeder head having hollow space with at least one hole open to environment and tube-shaped body used in metal casting operations has element for preventing tube-shaped body from falling out

Also Published As

Publication number Publication date
ES2290932T5 (en) 2014-10-06
ATE366629T1 (en) 2007-08-15
EP1728570B1 (en) 2007-07-11
DE102005025701B4 (en) 2007-03-08
ES2290932T3 (en) 2008-02-16
PL1728570T5 (en) 2014-11-28
PL1728570T3 (en) 2008-02-29
DE102005025701A1 (en) 2006-12-14
DE502006000029D1 (en) 2007-08-23
EP1728570A1 (en) 2006-12-06

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