EP0661121A1 - Lining plate for moulding chambers - Google Patents

Lining plate for moulding chambers Download PDF

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Publication number
EP0661121A1
EP0661121A1 EP93120995A EP93120995A EP0661121A1 EP 0661121 A1 EP0661121 A1 EP 0661121A1 EP 93120995 A EP93120995 A EP 93120995A EP 93120995 A EP93120995 A EP 93120995A EP 0661121 A1 EP0661121 A1 EP 0661121A1
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EP
European Patent Office
Prior art keywords
plate
lining
wear
lining plate
ventilation nozzles
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
EP93120995A
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German (de)
French (fr)
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EP0661121B1 (en
Inventor
Walter Picard
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.)
Picard Carl Aug GmbH and Co KG
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Picard Carl Aug GmbH and Co KG
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.)
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Publication date
Application filed by Picard Carl Aug GmbH and Co KG filed Critical Picard Carl Aug GmbH and Co KG
Priority to AT93120995T priority Critical patent/ATE160713T1/en
Priority to DE59307797T priority patent/DE59307797D1/en
Priority to EP93120995A priority patent/EP0661121B1/en
Priority to EP94119919A priority patent/EP0665100A1/en
Publication of EP0661121A1 publication Critical patent/EP0661121A1/en
Application granted granted Critical
Publication of EP0661121B1 publication Critical patent/EP0661121B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C11/00—Moulding machines characterised by the relative arrangement of the parts of same
    • B22C11/10—Moulding machines characterised by the relative arrangement of the parts of same with one or more flasks forming part of the machine, from which only the sand moulds made by compacting are removed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
    • B22C15/245—Blowing tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06—Core boxes

Definitions

  • the invention relates to a lining plate for mold chambers in molding machines for the production of mold blocks or casting molds, numerous partial areas being provided with ventilation nozzles.
  • Molding machines in particular so-called boxless molding machines, are known in practice in various designs, for example from DE 42 28 749 C1.
  • the molding machines are used to produce mold blocks or casting molds from molding sand.
  • the part of the molding machine relating to the invention has a molding chamber with a rectangular base plate, an upper plate and two side plates, which are also rectangular. Two vertical end faces are open.
  • a press plate with an inner model plate is moved to one end face, so that this end face is sealed.
  • a corresponding press plate with an inward facing model plate also seals the other end face.
  • Molding sand is then injected into the molding chamber via a feed hopper.
  • the molding sand is then compressed or compressed so much by the action of the two press plates and the two model plates that a dimensionally stable mold block is formed which can be pushed out after opening one end of the mold chamber. Any number of mold blocks can then be pushed one after the other onto a conveying device, where two mold blocks lying close together form cavities corresponding to the model plates, into which liquid metal can then be poured to form castings.
  • a problem that has been known for a long time is that when the molding sand is shot into the molding chambers and when the molding sand is compressed into mold blocks, the air contained in the molding chamber and in the molding sand must escape from the molding chamber, but that at the same time the sand grains of the molding sand must be retained.
  • Another problem is that the inner surfaces of the molding chamber are subjected to extremely high wear due to the pressing and grinding action. This applies not only to the molding rails specifically mentioned here for the production of molding blocks, but also to a wide variety of other molding machines in which abrasive material is pressed together.
  • the one-piece cladding panels from a hardened steel and to provide nozzle inserts as slot nozzles or ring nozzles in numerous holes in the plates.
  • the holes in the lining panels can only be drilled when the panels are uncured.
  • the plate hardening, at least surface hardening, must then be carried out in a further manufacturing process.
  • the manufacture of the nozzle inserts is also difficult because the slots of the slot nozzles or the nozzle openings of the ring nozzles as a whole have to be large enough to allow the air to escape, on the other hand the gaps have to be so narrow that the grains of sand are retained.
  • the effort for equipping the lining plates with the nozzle inserts and the manufacture of the nozzle inserts themselves is associated with an extraordinarily great effort.
  • the invention is based on the object of providing a lining plate which is simple to manufacture and has a very high wear resistance in the relevant area.
  • the object is achieved in that an inner wear plate is attached to an outer base plate, that the ventilation nozzles are produced by laser beam technology and are located exclusively in the wear plate, and that the base plate has air outlet openings in the area of the ventilation nozzles.
  • the lining plate is composed of an inner wear plate and an outer base plate, there are considerable cost advantages with regard to the choice of material, because the base plate is not subject to wear and is primarily designed for pressure and bending strength, an inexpensive steel material can be used.
  • the base plate does not need to have greater hardness properties and is therefore easy to machine to produce the numerous air outlet openings.
  • the wear plate on the other hand, can be made very thin up to a dimensionally stable sheet, which in turn leads to material and cost savings because a high-quality, fully hardened steel can be used for this.
  • the ventilation nozzles can be produced in the hardened wear plate by laser beam technology known per se, and at such a high speed that is far superior in comparison to rough machining.
  • the choice or setting of the laser beam makes it possible to produce extremely precise venting nozzles which are uniform in the slot width and which are dimensioned in such a way that the air can escape, but at the same time retain even the smallest sand bodies become.
  • the high, automatically controllable laser beam speed only relatively little heating of the surrounding material occurs in the area of the ventilation nozzles to be produced, so that there are no bulges, material distortions or stresses or other surface irregularities.
  • Fig. 1 illustrates in perspective a simplified drawing mold chamber 1, consisting of a base plate 2, an upper plate 3 and two side plates 4 and 5.
  • the upper plate 3 has, for example, a slot-shaped opening 6, above which in practice a feed hopper or Feeder for shooting in the molding sand is located.
  • the press plates with model plates located on the open end faces of the molding chamber in practice are not shown for the sake of simplicity.
  • the side plates 4 and 5 and optionally the top plate 3 and also the bottom plate 2 consist of the lining plates according to the invention.
  • Each of these plates has an inner wear plate 8 and an outer base body plate 7. As illustrated in particular in FIG. 2, the wear plate 8 has numerous ventilation nozzles 13 which are distributed over the entire surface.
  • the venting nozzles 13 are advantageously provided in circular surface areas. Such a circular surface area is shown approximately to scale in FIG. 7, the ventilation nozzles 13 being designed as slots 14 running parallel to one another. These slits 14 are produced by laser beam technology, the laser beam being automatically controllable in such a way that these slits can be produced in seconds.
  • the ventilation nozzles 13 are designed as slots which run parallel to one another and which are widened too slightly conically from the inner surface to the outer surface. This conical enlargement results automatically with appropriate selection and adjustment of the laser beam, so that the side of the wear plate on which the laser beam strikes forms the inner surface of the cavity of the molding chamber 1.
  • the ventilation nozzles produced by laser beam technology are located exclusively in the wear plate 8.
  • the base plate 7 shown in FIGS. 4 and 5 has air outlet openings 9 in the area of the ventilation nozzles 13. As shown in FIG. 4, the air outlet openings 9 in the base plate 7 are designed as cylindrical bores. This can also be clearly seen from FIG. 6.
  • the circular surface areas of the venting nozzles 13 according to FIG. 2 are advantageously evenly distributed in rows over the wear plate surface.
  • Shear pins 12 (FIGS. 2 and 6) can be inserted into corresponding pin bores 11 between the wear plate 8 and the base plate 7, in particular in the areas outside the mold blocks to be formed. 7 threaded holes 10 can be provided in the outer base plate for fastening the lining plates to outer machine parts, not shown.
  • the wear plate 8 can advantageously be fastened to the base plate 7 by means of a heat-resistant two-component adhesive, which can be applied in a flat or striped or punctiform manner. It is advisable to choose a two-component adhesive that consists of a resin, such as epoxy resin, and a hardener, such as polyaminomide. If such a two-component adhesive is selected and the appropriate application technique is used, the wear plate 8 can be removed from the base plate 7 after wear and replaced with a new one. The base plate 7 can then be used as often as desired.
  • the material properties of the wear plate and the base plate can be selected for the respective application.
  • a hardened wear plate which consists of a steel with medium chemical composition components of 1.55% C, 12% Cr, 0.7% Mo and 1.0% V. It is also advantageous to produce the base plate 7 from a steel with medium chemical composition components 0.16% C, 0.25% Si, 1.15% Mn and 0.95% Cr.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Devices For Molds (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

Moulding machines with moulding chambers (1) are used to produce boxless moulds or casting moulds. These moulding chambers have lining plates and numerous partial areas of these plates are provided with vent nozzles which allow the air contained in the relevant moulding chamber to escape but retain the moulding sand. In order to create a lining plate which is simple to manufacture and has a very high wear resistance in the area of importance, it is proposed that an inner wear plate (8) should be secured on an outer structural plate (7), that the vent nozzles should be produced by means of laser technology and should be located exclusively in the wear plate (8), and that the structural plate (7) should have air outlet openings in the region of the vent nozzles. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Auskleidungsplatte für Formkammern in Formmaschinen zur Herstellung von Formblöcken oder Gußformen, wobei zahlreiche Teilbereiche mit Entlüftungsdüsen versehen sind.The invention relates to a lining plate for mold chambers in molding machines for the production of mold blocks or casting molds, numerous partial areas being provided with ventilation nozzles.

Formmaschinen, insbesondere sogenannte kastenlose Formmaschinen, sind in der Praxis in verschiedenen Ausführungen bekannt, beispielsweise aus der DE 42 28 749 C1. Die Formmaschinen dienen dazu, Formblöcke oder Gußformen aus Formsand herzustellen. Was den die Erfindung betreffenden Teil der Formmaschine anbelangt, so besitzt diese eine Formkammer mit einer rechteckigen Bodenplatte, einer Oberplatte und zwei Seitenplatten, die ebenfalls rechteckig ausgebildet sind. Zwei vertikale einander gegenüberliegende Stirnseiten sind dabei offen. Zur Herstellung eines Formblocks wird an die eine Stirnseite eine Preßplatte mit einer inneren Modellplatte herangefahren, so daß diese Stirnseite abgedichtet ist. Eine entsprechende Preßplatte mit nach innen gerichteter Modellplatte schließt auch die andere Stirnseite dichtend ab. Über einen Aufgabetrichter wird sodann Formsand in die Formkammer eingeschossen. Anschließend wird der Formsand durch Wirkung der beiden Preßplatten und der beiden Modellplatten so stark verdichtet bzw. zusammengepreßt, daß ein formbeständiger Formblock entsteht, der nach Öffnen der einen Stirnseite der Formkammer ausgeschoben werden kann. Eine beliebige Anzahl von Formblöcken kann dann nacheinander auf eine Fördervorrichtung geschoben werden, wo jeweils zwei dicht aneinander liegende Formblöcke entsprechend den Modellplatten Hohlräume bilden, in die dann flüssiges Metall zur Bildung von Gußkörpern eingegossen werden kann.Molding machines, in particular so-called boxless molding machines, are known in practice in various designs, for example from DE 42 28 749 C1. The molding machines are used to produce mold blocks or casting molds from molding sand. As for the part of the molding machine relating to the invention, it has a molding chamber with a rectangular base plate, an upper plate and two side plates, which are also rectangular. Two vertical end faces are open. To produce a mold block, a press plate with an inner model plate is moved to one end face, so that this end face is sealed. A corresponding press plate with an inward facing model plate also seals the other end face. Molding sand is then injected into the molding chamber via a feed hopper. The molding sand is then compressed or compressed so much by the action of the two press plates and the two model plates that a dimensionally stable mold block is formed which can be pushed out after opening one end of the mold chamber. Any number of mold blocks can then be pushed one after the other onto a conveying device, where two mold blocks lying close together form cavities corresponding to the model plates, into which liquid metal can then be poured to form castings.

Ein seit langer Zeit bekanntes Problem besteht darin, daß beim Einschießen des Formsandes in die Formkammern und beim Zusammenpressen des Formsandes zu Formblöcken die in der Formkammer und im Formsand enthaltene Luft aus der Formkammer entweichen muß, daß aber gleichzeitig die Sandkörner des Formsandes zurückgehalten werden müssen. Das weitere Problem besteht darin, daß die Innenflächen der Formkammer durch die Preß- und Schleifwirkung einem außerordentlich hohen Verschleiß unterworfen sind. Dies gilt nicht nur für die hier besonders angesprochenen Formschienen zur Herstellung von Formblöcken, sondern auch für die verschiedensten anderen Formmaschinen, in denen schmirgelndes Material zusammengepreßt wird.A problem that has been known for a long time is that when the molding sand is shot into the molding chambers and when the molding sand is compressed into mold blocks, the air contained in the molding chamber and in the molding sand must escape from the molding chamber, but that at the same time the sand grains of the molding sand must be retained. Another problem is that the inner surfaces of the molding chamber are subjected to extremely high wear due to the pressing and grinding action. This applies not only to the molding rails specifically mentioned here for the production of molding blocks, but also to a wide variety of other molding machines in which abrasive material is pressed together.

Um diesen zuvor erläuterten Problemen Herr zu werden, gehört es zum allgemein bekannten Stand der Technik, die einstückigen Verkleidungsplatten aus einem gehärteten Stahl herzustellen und in zahlreichen Bohrungen der Platten Düseneinsätze als Schlitzdüsen oder Ringdüsen vorzusehen. Hierbei ergeben sich aber wieder weitere Schwierigkeiten. Aus Fertigungsgründen kann man die Bohrungen in den Auskleidungsplatten nur in ungehärtetem Zustand der Platten vornehmen. Danach muß dann in einem weiteren Fertigungsvorgang die Plattenhärtung, zumindest eine Oberflächenhärtung, vorgenommen werden. Auch das Herstellen der Düseneinsätze ist mit Schwierigkeiten verbunden, weil die Schlitze der Schlitzdüsen oder die Düsenöffnungen der Ringdüsen insgesamt ausreichend groß sein müssen, um die Luft austreten zu lassen, andererseits müssen die Spalte so schmal sein, daß die Sandkörner zurückgehalten werden. Außerdem ist der Aufwand für die Bestückung der Auskleidungsplatten mit den Düseneinsätzen und das Herstellen der Düseneinsätze selbst mit außerordentlich großem Aufwand verbunden.In order to overcome these problems explained above, it is part of the generally known prior art to produce the one-piece cladding panels from a hardened steel and to provide nozzle inserts as slot nozzles or ring nozzles in numerous holes in the plates. Here, however, there are further difficulties. For manufacturing reasons, the holes in the lining panels can only be drilled when the panels are uncured. The plate hardening, at least surface hardening, must then be carried out in a further manufacturing process. The manufacture of the nozzle inserts is also difficult because the slots of the slot nozzles or the nozzle openings of the ring nozzles as a whole have to be large enough to allow the air to escape, on the other hand the gaps have to be so narrow that the grains of sand are retained. In addition, the effort for equipping the lining plates with the nozzle inserts and the manufacture of the nozzle inserts themselves is associated with an extraordinarily great effort.

Demgegenüber liegt der Erfindung die Aufgabe zu Grunde, eine Auskleidungsplatte zu schaffen, die einfach herzustellen ist und in dem maßgeblichen Bereich eine sehr hohe Verschleißfestigkeit aufweist.In contrast, the invention is based on the object of providing a lining plate which is simple to manufacture and has a very high wear resistance in the relevant area.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine innere Verschleißplatte an einer äußeren Grundkörperplatte befestigt ist, daß die Entlüftungsdüsen durch Laserstrahltechnik hergestellt sind und sich ausschließlich in der Verschleißplatte befinden, und daß die Grundkörperplatte im Bereich der Entlüftungsdüsen Luftaustrittsöffnungen aufweist.The object is achieved in that an inner wear plate is attached to an outer base plate, that the ventilation nozzles are produced by laser beam technology and are located exclusively in the wear plate, and that the base plate has air outlet openings in the area of the ventilation nozzles.

Verglichen mit dem Stand der Technik ergibt sich auf diese Weise eine Reihe wesentlicher Vorteile. Dadurch, daß die Auskleidungsplatte aus einer inneren Verschleißplatte und einer äußeren Grundkörperplatte zusammengesetzt ist, ergeben sich erhebliche Kostenvorteile in Bezug auf die Materialauswahl, weil die Grundkörperplatte keinem Verschleiß unterliegt und hauptsächlich auf Druck und Biegefestigkeit auszulegen ist, kann ein kostengünstiges Stahlmaterial Verwendung finden. Die Grundkörperplatte braucht auch nicht größere Härteeigenschaften aufweisen und ist daher zur Herstellung der zahlreichen Luftaustrittsöffnungen leicht zu bearbeiten. Die Verschleißplatte kann dagegen sehr dünn bis hin zu einem formstabilen Blech ausgeführt werden, was wiederum zu einer Material- und Kostenersparnis führt, weil hierfür ein hochwertiger durchgehend gehärteter Stahl Verwendung finden kann. Dabei hat sich im Rahmen der Erfindung überraschenderweise erwiesen, daß die Entlüftungsdüsen durch an sich bekannte Laserstrahltechnik in der gehärteten Verschleißplatte herstellbar sind, und zwar mit einer so großen Geschwindigkeit, die im Vergleich mit einer etwa spanabhebenden Bearbeitung weit überlegen ist. Außerdem hat sich erwiesen, daß durch Wahl bzw. Einstellung des Laserstrahles äußerst präzise und in der Schlitzweite gleichmäßige Entlüftungsdüsen herstellbar sind, die genau so bemessen sind, daß die Luft entweichen kann, gleichzeitig aber auch die kleinsten Sandkörper zurückgehalten werden. Infolge der hohen automatisch steuerbaren Laserstrahlgeschwindigkeit ergeben sich im Bereich der herzustellenden Entlüftungsdüsen auch nur verhältnismäßig geringe Erwärmungen des umgebenden Materials, so daß es nicht zu Auswölbungen, Materialverzerrungen oder - spannungen oder sonstigen Oberflächenungleichmäßigkeiten kommt.Compared to the prior art, this results in a number of significant advantages. Because the lining plate is composed of an inner wear plate and an outer base plate, there are considerable cost advantages with regard to the choice of material, because the base plate is not subject to wear and is primarily designed for pressure and bending strength, an inexpensive steel material can be used. The base plate does not need to have greater hardness properties and is therefore easy to machine to produce the numerous air outlet openings. The wear plate, on the other hand, can be made very thin up to a dimensionally stable sheet, which in turn leads to material and cost savings because a high-quality, fully hardened steel can be used for this. It has surprisingly been found in the context of the invention that the ventilation nozzles can be produced in the hardened wear plate by laser beam technology known per se, and at such a high speed that is far superior in comparison to rough machining. In addition, it has been found that the choice or setting of the laser beam makes it possible to produce extremely precise venting nozzles which are uniform in the slot width and which are dimensioned in such a way that the air can escape, but at the same time retain even the smallest sand bodies become. As a result of the high, automatically controllable laser beam speed, only relatively little heating of the surrounding material occurs in the area of the ventilation nozzles to be produced, so that there are no bulges, material distortions or stresses or other surface irregularities.

Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous refinements of the invention result from the subclaims.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung im Schema dargestellt, und zwar zeigen

  • Fig. 1 eine perspektivische Ansicht einer Formkammer mit Auskleidungsplatten,
  • Fig. 2 eine Ansicht auf eine Verschleißplatte,
  • Fig. 3 eine Stirnansicht auf die Verschleißplatte gemäß Fig. 2, die auf einer Grundkörperplatte befestigt ist,
  • Fig. 4 eine Ansicht auf die Grundkörperplatte mit Luftaustrittsöffnungen,
  • Fig. 5 eine Stirnansicht auf die Grundkörperplatte gemäß Fig. 4,
  • Fig. 6 einen Teilschnitt gemäß Schnittlinie VI-VI in Fig. 2 und
  • Fig. 7 eine Draufsicht auf einen Ausschnitt aus der Verschleißplatte gemäß Fig. 2 mit Darstellung einer Entlüftungsdüse mit Schlitzdüsen, beispielsweise in Originalgröße.
In the drawing, an embodiment of the invention is shown in the diagram, namely show
  • 1 is a perspective view of a molding chamber with lining plates,
  • 2 is a view of a wear plate,
  • 3 is an end view of the wear plate according to FIG. 2, which is attached to a base plate,
  • 4 is a view of the base plate with air outlet openings,
  • 5 is an end view of the base plate according to FIG. 4,
  • Fig. 6 is a partial section along section line VI-VI in Fig. 2 and
  • Fig. 7 is a plan view of a section of the wear plate of FIG. 2 showing a vent nozzle with slot nozzles, for example in the original size.

Fig. 1 veranschaulicht in perspektivischer Darstellung eine vereinfacht gezeichnete Formkammer 1, bestehend aus einer Bodenplatte 2, einer Oberplatte 3 und zwei Seitenplatten 4 und 5. Die Oberplatte 3 besitzt beispielsweise eine schlitzförmige Öffnung 6, über der sich in der Praxis ein Aufgabetrichter bzw. eine Aufgabevorrichtung zum Einschießen des Formsandes befindet. Die in der Praxis an den offenen Stirnseiten der Formkammer befindlichen Preßplatten mit Modellplatten sind der Einfachheit halber nicht dargestellt. Die Seitenplatten 4 und 5 und gegebenenfalls die Oberplatte 3 und auch die Bodenplatte 2 bestehen aus den erfindungsgemäßen Auskleidungsplatten. Jede dieser Platten besitzt eine innere Verschleißplatte 8 und eine äußere Grundkörperplatte 7. Wie insbesondere Fig. 2 veranschaulicht, besitzt die Verschleißplatte 8 zahlreiche Entlüftungsdüsen 13, die über die gesamte Fläche verteilt sind. Der Einfachheit halber sind nur einige Teilreihen der Düsen dargestellt. Vorteilhafterweise sind die Entlüftungsdüsen 13 in Kreisflächenbereichen vorgesehen. Ein solcher Kreisflächenbereich ist in Fig. 7 etwa maßstabsgerecht gezeigt, wobei die Entlüftungsdüsen 13 als parallel zueinander verlaufende Schlitze 14 ausgebildet sind. Diese Schlitze 14 sind durch Laserstrahltechnik hergestellt, wobei der Laserstrahl automatisch so steuerbar ist, daß sich diese Schlitze in Sekundengeschwindigkeit herstellen lassen. Bei diesem Ausführungsbeispiel gemäß Fig. 7 sind die Entlüftungsdüsen 13 als parallel zueinander verlaufende Schlitze ausgebildet, welche von der Innenfläche nach der Außenfläche zu leicht konisch erweitert sind. Diese konische Erweiterung ergibt sich automatisch bei entsprechender Wahl und Einstellung des Laserstrahles, so daß diejenige Seite der Verschleißplatte, an der der Laserstrahl auftrifft, die Innenfläche zum Hohlraum der Formkammer 1 bildet. Die durch Laserstrahltechnik hergestellten Entlüftungsdüsen befinden sich ausschließlich in der Verschleißplatte 8.Fig. 1 illustrates in perspective a simplified drawing mold chamber 1, consisting of a base plate 2, an upper plate 3 and two side plates 4 and 5. The upper plate 3 has, for example, a slot-shaped opening 6, above which in practice a feed hopper or Feeder for shooting in the molding sand is located. The press plates with model plates located on the open end faces of the molding chamber in practice are not shown for the sake of simplicity. The side plates 4 and 5 and optionally the top plate 3 and also the bottom plate 2 consist of the lining plates according to the invention. Each of these plates has an inner wear plate 8 and an outer base body plate 7. As illustrated in particular in FIG. 2, the wear plate 8 has numerous ventilation nozzles 13 which are distributed over the entire surface. For the sake of simplicity, only a few partial rows of the nozzles are shown. The venting nozzles 13 are advantageously provided in circular surface areas. Such a circular surface area is shown approximately to scale in FIG. 7, the ventilation nozzles 13 being designed as slots 14 running parallel to one another. These slits 14 are produced by laser beam technology, the laser beam being automatically controllable in such a way that these slits can be produced in seconds. In this exemplary embodiment according to FIG. 7, the ventilation nozzles 13 are designed as slots which run parallel to one another and which are widened too slightly conically from the inner surface to the outer surface. This conical enlargement results automatically with appropriate selection and adjustment of the laser beam, so that the side of the wear plate on which the laser beam strikes forms the inner surface of the cavity of the molding chamber 1. The ventilation nozzles produced by laser beam technology are located exclusively in the wear plate 8.

Die in den Fig. 4 und 5 dargestellte Grundkörperplatte 7 besitzt im Bereich der Entlüftungsdüsen 13 Luftaustrittsöffnungen 9. Wie Fig. 4 zeigt, sind die Luftaustrittsöffnungen 9 in der Grundkörperplatte 7 als zylindrische Bohrungen ausgebildet. Dies ist auch aus der Fig. 6 deutlich ersichtlich.The base plate 7 shown in FIGS. 4 and 5 has air outlet openings 9 in the area of the ventilation nozzles 13. As shown in FIG. 4, the air outlet openings 9 in the base plate 7 are designed as cylindrical bores. This can also be clearly seen from FIG. 6.

Wie zuvor bereits erwähnt, sind die Kreisflächenbereiche der Entlüftungsdüsen 13 gemäß Fig. 2 vorteilhafterweise in Reihen gleichmäßig über die Verschleißplattenfläche verteilt.As previously mentioned, the circular surface areas of the venting nozzles 13 according to FIG. 2 are advantageously evenly distributed in rows over the wear plate surface.

Zwischen der Verschleißplatte 8 und der Grundkörperplatte 7, insbesondere in den Bereichen außerhalb der zu bildenden Formblöcke, können Scherstifte 12 (Fig. 2 und Fig. 6) in entsprechende Stiftbohrungen 11 eingesetzt werden. Zur Befestigung der Auskleidungsplatten an äußeren nicht gezeichneten Maschinenteilen können in der äußeren Grundkörperplatte 7 Gewindebohrungen 10 vorgesehen werden.Shear pins 12 (FIGS. 2 and 6) can be inserted into corresponding pin bores 11 between the wear plate 8 and the base plate 7, in particular in the areas outside the mold blocks to be formed. 7 threaded holes 10 can be provided in the outer base plate for fastening the lining plates to outer machine parts, not shown.

Die Befestigung der Verschleißplatte 8 an der Grundkörperplatte 7 kann vorteilhafterweise mittels eines hitzebeständigen Zweikomponenteklebers erfolgen, welcher flächig oder streifenförmig oder punktförmig aufgetragen werden kann. Es empfiehlt sich, einen Zweikomponentenkleber zu wählen, der aus einem Harz, wie Epoxidharz, und einem Härter, wie Polyaminomid, besteht. Bei Wahl eines solchen Zweikomponentenklebers und bei entsprechender Auftragetechnik läßt sich die Verschleißplatte 8 nach Verschleiß von der Grundkörperplatte 7 abnehmen und durch eine neue ersetzt werden. Die Grundkörperplatte 7 kann dann beliebig oft immer weiter verwendet werden.The wear plate 8 can advantageously be fastened to the base plate 7 by means of a heat-resistant two-component adhesive, which can be applied in a flat or striped or punctiform manner. It is advisable to choose a two-component adhesive that consists of a resin, such as epoxy resin, and a hardener, such as polyaminomide. If such a two-component adhesive is selected and the appropriate application technique is used, the wear plate 8 can be removed from the base plate 7 after wear and replaced with a new one. The base plate 7 can then be used as often as desired.

Es versteht sich, daß die Materialeigenschaften der Verschleißplatte und der Grundkörperplatte für den jeweiligen Anwendungsfall gewählt werden können. Für den hier besonders hervorgehobenen Anwendungsfall als Auskleidungsplatte für Formkammern hat sich als vorteilhaft erwiesen, eine gehärtete Verschleißplatte zu wählen, die aus einem Stahl mit mittleren chemischen Zusammensetzungskomponenten von 1,55% C, 12% Cr, 0,7% Mo und 1,0% V besteht. Dabei ist ferner vorteilhaft, die Grundkörperplatte 7 aus einem Stahl herzustellen mit mittleren chemischen Zusammensetzungskomponenten 0,16% C, 0,25% Si, 1,15% Mn und 0,95% Cr.It goes without saying that the material properties of the wear plate and the base plate can be selected for the respective application. For the application highlighted here as a lining panel For mold chambers it has proven to be advantageous to choose a hardened wear plate which consists of a steel with medium chemical composition components of 1.55% C, 12% Cr, 0.7% Mo and 1.0% V. It is also advantageous to produce the base plate 7 from a steel with medium chemical composition components 0.16% C, 0.25% Si, 1.15% Mn and 0.95% Cr.

Claims (9)

Auskleidungsplatte für Formkammern (1) in Formmaschinen zur Herstellung von Formblöcken oder Gußformen, wobei zahlreiche Teilbereiche mit Entlüftungsdüsen versehen sind, dadurch gekennzeichnet, daß eine innere Verschleißplatte (8) an einer äußeren Grundkörperplatte (7) befestigt ist, daß die Entlüftungsdüsen (13) durch Laserstrahltechnik hergestellt sind und sich ausschließlich in der Verschleißplatte (8) befinden, und daß die Grundkörperplatte (7) im Bereich der Entlüftungsdüsen (13) Luftaustrittsöffnungen (9) aufweist.Lining plate for mold chambers (1) in molding machines for the production of mold blocks or casting molds, numerous partial areas being provided with ventilation nozzles, characterized in that an inner wear plate (8) is fastened to an outer base plate (7) in such a way that the ventilation nozzles (13) pass through Laser beam technology are produced and are located exclusively in the wear plate (8), and that the base plate (7) has air outlet openings (9) in the area of the ventilation nozzles (13). Auskleidungsplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Entlüftungsdüsen (13) als parallel zueinander verlaufende Schlitze (14) ausgebildet sind, welche von der Innenfläche nach der Außenfläche zu leicht konisch erweitert sind.Lining plate according to claim 1, characterized in that the ventilation nozzles (13) are designed as slots (14) which run parallel to one another and which are slightly conically widened from the inner surface to the outer surface. Auskleidungsplatte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Entlüftungsdüsen (13) in Kreisflächenbereichen vorgesehen sind, und daß die Luftaustrittsöffnungen (9) in der Grundkörperplatte (7) als zylindrische Bohrungen ausgebildet sind.Lining plate according to claim 1 or 2, characterized in that the ventilation nozzles (13) are provided in circular surface areas, and that the air outlet openings (9) in the base plate (7) are designed as cylindrical bores. Auskleidungsplatte nach Anspruch 3, dadurch gekennzeichnet, daß die Kreisflächenbereiche der Entlüftungsdüsen (13) reihenweise gleichmäßig über die Verschleißplattenfläche verteilt sind.Lining plate according to claim 3, characterized in that the circular surface areas of the ventilation nozzles (13) are evenly distributed in rows over the wear plate surface. Auskleidungsplatte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Befestigung der Verschleißplatte (8) an der Grundkörperplatte (7) mittels eines hitzebeständigen Zweikomponentenklebers erfolgt, welcher flächig oder streifenförmig oder punktförmig aufgetragen ist.Lining plate according to one of the preceding claims, characterized in that the fastening of the wear plate (8) to the base plate (7) by means of a heat-resistant two-component adhesive takes place, which is applied flat or strip-shaped or punctiform. Auskleidungsplatte nach Anspruch 5, dadurch gekennzeichnet, daß der Zweikomponentenkleber aus einem Harz, wie Epoxidharz, und einem Härter, wie Polyaminomid, besteht.Lining panel according to claim 5, characterized in that the two-component adhesive consists of a resin, such as epoxy resin, and a hardener, such as polyaminomide. Auskleidungsplatte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwischen der Verschleißplatte (8) und der Grundkörperplatte (7), insbesondere in den Bereichen außerhalb der zu bildenden Formblöcke, Scherstifte (12) eingesetzt sind.Lining plate according to one of the preceding claims, characterized in that shear pins (12) are inserted between the wear plate (8) and the base body plate (7), in particular in the regions outside the mold blocks to be formed. Auskleidungsplatte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Verschleißplatte (8) gehärtet ist und aus einem Stahl mit mittleren chemischen Zusammensetzungskomponenten von 1,55% C, 12% Cr, 0,7% Mo und 1,0% V besteht.Lining plate according to one of the preceding claims, characterized in that the wear plate (8) is hardened and consists of a steel with average chemical composition components of 1.55% C, 12% Cr, 0.7% Mo and 1.0% V. Auskleidungsplatte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Grundkörperplatte (7) aus einem Stahl mit mittleren chemischen Zusammensetzungskomponenten von 0,16% C, 0,25% Si, 1,15% Mn und 0,95% Cr besteht.Lining plate according to one of the preceding claims, characterized in that the base body plate (7) consists of a steel with average chemical composition components of 0.16% C, 0.25% Si, 1.15% Mn and 0.95% Cr.
EP93120995A 1993-12-28 1993-12-28 Lining plate for moulding chambers Expired - Lifetime EP0661121B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT93120995T ATE160713T1 (en) 1993-12-28 1993-12-28 LINING PLATE FOR MOLD CHAMBERS
DE59307797T DE59307797D1 (en) 1993-12-28 1993-12-28 Lining plate for mold chambers
EP93120995A EP0661121B1 (en) 1993-12-28 1993-12-28 Lining plate for moulding chambers
EP94119919A EP0665100A1 (en) 1993-12-28 1994-12-16 Working table top

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93120995A EP0661121B1 (en) 1993-12-28 1993-12-28 Lining plate for moulding chambers

Publications (2)

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EP0661121A1 true EP0661121A1 (en) 1995-07-05
EP0661121B1 EP0661121B1 (en) 1997-12-03

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EP93120995A Expired - Lifetime EP0661121B1 (en) 1993-12-28 1993-12-28 Lining plate for moulding chambers

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EP (1) EP0661121B1 (en)
AT (1) ATE160713T1 (en)
DE (1) DE59307797D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042461A1 (en) * 1997-03-26 1998-10-01 Georg Fischer Disa A/S Arrangement in foundry equipment comprising e.g. a moulding mac hine and a conveyor for 'green' sand moulds
AT413949B (en) * 2003-06-17 2006-07-15 Boehler Bleche Multilayer Gmbh DEVICE FOR CREATING MOLDING
WO2010041091A1 (en) * 2008-10-06 2010-04-15 Disa Industries A/S Lining plate for lining of moulding chambers of moulding machines
WO2012163434A1 (en) * 2011-05-27 2012-12-06 Carl Aug. Picard GmbH Wear part for fastening to a construction part, in particular a wear plate or strip for a foundry machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20309389U1 (en) * 2003-06-16 2003-08-28 Picard Fa Carl Aug Cladding plate for molding boxes used in molding machines to make mold blocks or casting molds, include orientated-slot vent nozzles

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2217137A1 (en) * 1973-02-15 1974-09-06 Biotteau Gerard Venting of mould cavities - via microscopic perforations made by laser drilling
WO1984004711A1 (en) * 1983-05-28 1984-12-06 Picard Fa Carl Aug Lining plate for the moulding chamber of a moulding machine
EP0315087A1 (en) * 1987-10-31 1989-05-10 Harry Post Lining for the moulding chamber of flaskless moulding machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2217137A1 (en) * 1973-02-15 1974-09-06 Biotteau Gerard Venting of mould cavities - via microscopic perforations made by laser drilling
WO1984004711A1 (en) * 1983-05-28 1984-12-06 Picard Fa Carl Aug Lining plate for the moulding chamber of a moulding machine
EP0315087A1 (en) * 1987-10-31 1989-05-10 Harry Post Lining for the moulding chamber of flaskless moulding machines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042461A1 (en) * 1997-03-26 1998-10-01 Georg Fischer Disa A/S Arrangement in foundry equipment comprising e.g. a moulding mac hine and a conveyor for 'green' sand moulds
AT413949B (en) * 2003-06-17 2006-07-15 Boehler Bleche Multilayer Gmbh DEVICE FOR CREATING MOLDING
WO2010041091A1 (en) * 2008-10-06 2010-04-15 Disa Industries A/S Lining plate for lining of moulding chambers of moulding machines
AU2008362734B2 (en) * 2008-10-06 2013-09-12 Disa Industries A/S Lining plate for lining of moulding chambers of moulding machines
US9662706B2 (en) 2008-10-06 2017-05-30 Disa Industries A/S Lining plate for lining of moulding chambers of moulding machines
WO2012163434A1 (en) * 2011-05-27 2012-12-06 Carl Aug. Picard GmbH Wear part for fastening to a construction part, in particular a wear plate or strip for a foundry machine

Also Published As

Publication number Publication date
ATE160713T1 (en) 1997-12-15
EP0661121B1 (en) 1997-12-03
DE59307797D1 (en) 1998-01-15

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