EP1488872B1 - Device for the manufacture of casting moulds - Google Patents
Device for the manufacture of casting moulds Download PDFInfo
- Publication number
- EP1488872B1 EP1488872B1 EP04450106A EP04450106A EP1488872B1 EP 1488872 B1 EP1488872 B1 EP 1488872B1 EP 04450106 A EP04450106 A EP 04450106A EP 04450106 A EP04450106 A EP 04450106A EP 1488872 B1 EP1488872 B1 EP 1488872B1
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- EP
- European Patent Office
- Prior art keywords
- plate
- boundary
- chamber
- air
- hard layer
- 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.)
- Expired - Lifetime
Links
- 238000005266 casting Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title description 14
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000004576 sand Substances 0.000 claims abstract description 8
- 238000010276 construction Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910001315 Tool steel Inorganic materials 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims description 2
- 238000000137 annealing Methods 0.000 claims 1
- 239000007767 bonding agent Substances 0.000 claims 1
- 239000011572 manganese Substances 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 2
- 239000011733 molybdenum Substances 0.000 abstract description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052721 tungsten Inorganic materials 0.000 abstract description 2
- 239000010937 tungsten Substances 0.000 abstract description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000470 constituent Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000003110 molding sand Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 229910000760 Hardened steel Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
Images
Classifications
-
- 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
Definitions
- the invention relates to a boundary plate for a chamber space for creating a mold piece at least one casting mold, wherein processed molding sand for forming pieces with compressed air injected into the chamber space enclosing a model and the air is discharged through slots in at least one of the boundary plates of the chamber space.
- Castings are increasingly being used in modern technology because they have high product quality and economic efficiency, in particular in mass production, due to the improved manufacturing process, the increased quality of the cast metal and the possibility of a largely automated production technology.
- An economic mold production is of particular importance, because it must on the one hand have a special profile stability, but also a starting point in the introduction of liquid metal in order to ensure the best casting surfaces.
- a targeted introduction of molding material in a mold space around the model for mold production is of importance in order to achieve uniformly high piece quality in a casting series.
- Casting molds can be produced in the box and boxless process, wherein in the former two boxes each filled with a model half with foundry sand and positioned congruent to one another after pouring the sand and made ready for casting.
- Special equipment has been developed for a boxless casting production.
- a formation of a chamber space bounded by plates takes place, wherein two opposite plates carry model parts and are movable relative to one another.
- At least one further plate has a generally gap-shaped wider opening, through which molding sand can be injected, wherein for a discharge of the injection air from the chamber chamber narrow slits in the (n) other plate (s) are provided.
- the processed molding sand is blown in the boxless molding production process usually with about 2 to 3 bar pressure having air into the chambers.
- a chamber consists of two side plates, two model plates, a bottom plate and a top or cover plate.
- the side plates and the top plate are provided with Heilaustragsstoffn optionally in the form of annular slots, which usually has the upper plate and a gap-shaped opening for blowing the molding sand.
- the molding sand has an abrasive effect on the boundary plates of the chamber space, so that these, also called chamber plates, are made of case-hardened steel plates according to the prior art.
- the annular slots for the air discharge in the designated chamber plates are consistently created such that in prefabricated holes of the case-hardened steel plates are pressed with a thickness of 15 mm to 30 mm specially shaped nozzle pieces whose head has a distance to the bore wall.
- Such a case hardened steel limiting plate for a chamber space which chamber plate has a variety of holes equipped with nozzles for creating the Beeraustragsschlitze, may well have the desired functions in a machine for molding production, but has the disadvantages of a low life and a complex production.
- the invention is now the goal of creating a boundary plate for a chamber chamber of the type mentioned, which plate can be produced economically, has a higher wear resistance and durability and has the required performance properties.
- a generic chamber chamber on the one hand, characterized in that at least one provided for the air discharge boundary plate or chamber plate made of a wear-resistant material, for example containing in wt .-% more than 1.0 wt .-% carbon (C) and more than 8.0% by weight of chromium (Cr), optionally further comprising proportions of manganese (Mn), molybdenum (Mo), tungsten (W) and vanadium (V) as main alloying elements, and in the region (s) ) has a plurality of curved slots for the air discharge.
- a wear-resistant material for example containing in wt .-% more than 1.0 wt .-% carbon (C) and more than 8.0% by weight of chromium (Cr), optionally further comprising proportions of manganese (Mn), molybdenum (Mo), tungsten (W) and vanadium (V) as main alloying elements, and in the region (s) ) has a plurality of
- the object of the invention is also achieved in a chamber chamber of the type mentioned in that at least one provided for the air discharge boundary plate or chamber plate in sandwich construction with a support plate and a facing the interior of hard-wearing material formed hard layer plate is formed and the hard layer plate a Having a plurality of curved slots, which correspond to the air discharge means of the support plate.
- the individual slots are designed according to the invention curved, so that no straight webs are formed, which can arrive at a stimulation during operation in resonant vibrations, which represent an increased risk of breakage due to a general given material brittleness of highly wear-resistant materials.
- the support plate is made of structural steel, for example a material 52.3 and has vent holes
- the hard-layer plate for example, on a material No. 1.2601 steel-iron list
- the advantage lies in such an embodiment of the chamber plate, as was found, on the one hand in an economical or cost-effective production and processing, in particular, the support plate has low material costs, on the other hand outstanding performance characteristics are achieved with high plate stability.
- the joining of the sandwich panels by adhesion for example by means of a commercially available metal adhesive is created, the manufacturing technology can be further simplified and the support and the damping of the hard-coated plate can be improved.
- this or the hard layer of a sandwich plate is formed from a tool steel and has a thermal wear by highest wear resistance and toughness-containing structure.
- Fig. 1 shows in top view of the chamber interior a top or cover plate 1.
- a homogeneous or sandwiched plate 12 is a plurality of interrupted ring slots 2 introduced as discharge for a conveying gas, which is arranged around a gap-shaped opening 122 for blowing molding sand by means of conveying gas.
- fasteners 123 are provided.
- FIG. 2 is a cross-sectional view of a sandwich plate, consisting of a support plate 11 and a hard-layer plate 12 in section, shown in the region of a Heilaustragsstoffs.
- a carrier plate 11, which has vent bores 111, is connected in a planar manner to a hard-layer plate 12 with a thickness 121, in that annular slots 2 are positioned in the hard-layer plate 12 within the bore 111 of the carrier plate 11.
- Fig. 3 shows a slot image and a plan view from the chamber interior to a ring slot 2 in a Begrenzungsplatte1.
- a ring slot 2 with an outer diameter 23 has a slot width 22 and webs with a width 21.
- these land areas must absorb shear forces due to a higher pressure in the chamber space and the annular slot inner surface. Resonant vibrations of a part are not given during operation.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Devices For Molds (AREA)
- Connection Of Plates (AREA)
- Control Of Heat Treatment Processes (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
Die Erfindung betrifft eine Begrenzungsplatte für einen Kammerraum zur Erstellung eines Formenstückes zumindest einer Gießform, wobei aufbereiteter Formsand zur Formenstückbildung mit Druckluft in den ein Modell einschließenden Kammerraum eingeblasen und die Luft durch Schlitze in zumindest einer der Begrenzungsplatten des Kammerraumes ausgetragen wird.The invention relates to a boundary plate for a chamber space for creating a mold piece at least one casting mold, wherein processed molding sand for forming pieces with compressed air injected into the chamber space enclosing a model and the air is discharged through slots in at least one of the boundary plates of the chamber space.
In der modernen Technik werden in zunehmendem Maße Gußstücke eingesetzt, weil diese auf Grund der verbesserten Herstellverfahren, der gesteigerten Güte des Gießmetalles und der Möglichkeit einer weitgehend automatisierten Fertigungstechnik hohe Produktqualität und Wirtschaftlichkeit insbesondere in einer Serienfertigung aufweisen.Castings are increasingly being used in modern technology because they have high product quality and economic efficiency, in particular in mass production, due to the improved manufacturing process, the increased quality of the cast metal and the possibility of a largely automated production technology.
Einer wirtschaftlichen Gießformherstellung kommt dabei eine besondere Bedeutung zu, denn diese muss einerseits eine besondere Profilstabilität, aber auch eine Ausgangsmöglichkeit bei der Flüssigmetalleinbringung haben, um beste Gußstückoberflächen sicherstellen zu können. Andererseits ist im automatisierten Betrieb eine gezielte Formstoffeinbringung in einem Formenraum um das Modell zur Gießformerstellung von Wichtigkeit, um gleichmäßig hohe Stückgüte in einer Gußteilserie zu erreichen.An economic mold production is of particular importance, because it must on the one hand have a special profile stability, but also a starting point in the introduction of liquid metal in order to ensure the best casting surfaces. On the other hand, in automated operation, a targeted introduction of molding material in a mold space around the model for mold production is of importance in order to achieve uniformly high piece quality in a casting series.
Gießformen sind im kasten und kastenlosen Verfahren herstellbar, wobei bei ersterem zwei Kasten mit je einer Modellhälfte mit Gießereisand befüllt und nach einem Verdichten des Sandes deckungsgleich aufeinander positioniert und gießbereit gestellt werden. Für eine kastenlose Gießformherstellung wurden besondere Einrichtungen entwickelt. Im Prinzip erfolgt dabei eine Bildung eines durch Platten begrenzen Kammerraumes, wobei zwei gegenüberliegende Platten Modellteile tragen und zueinander bewegbar sind. Zumindest eine weitere Platte weist eine zumeist spaltförmige breitere Öffnung auf, durch welche Formsand eingeblasen werden kann, wobei für einen Austrag der Einblasluft aus dem Kammerraum schmale Schitze in der(n) anderen Platte(n) vorgesehen sind.Casting molds can be produced in the box and boxless process, wherein in the former two boxes each filled with a model half with foundry sand and positioned congruent to one another after pouring the sand and made ready for casting. Special equipment has been developed for a boxless casting production. In principle, a formation of a chamber space bounded by plates takes place, wherein two opposite plates carry model parts and are movable relative to one another. At least one further plate has a generally gap-shaped wider opening, through which molding sand can be injected, wherein for a discharge of the injection air from the chamber chamber narrow slits in the (n) other plate (s) are provided.
Zur Formherstellung erfolgt beim kastenlosen Verfahren nach einem Befüllen des Kammerraumes mit Gießereisand im Einblaseverfahren ein gegenseitiges Annähern der Modellplatten und damit ein weiteres Verdichten des Sandes, wonach ein beidseitig Modestrutur aufweisendes Formenstück aus der Einrichtung ausgebracht und bereitgestellt werden kann. Ein weiteres Formenstück wird mit der Gegenmodellstruktur passend jeweils an das vorgefertigte dicht angestellt, wodurch eine Mehrzahl von gleichartigen Gießformhohlräumen in einer Formenstückreihe gebildet wird, welche mit Flüssigmetall zur Serienherstellung von Gußstücken gefüllt werden können.For mold production takes place in the case-less process after filling the chamber space with foundry sand in Einblaseverfahren a mutual approach of the model plates and thus a further compacting of the sand, after which a two-sided fashion structure exhibiting mold from the device can be deployed and provided. Another mold piece is tightly fitted with the counter model structure respectively to the prefabricated one, thereby forming a plurality of similar mold cavities in a mold string, which can be filled with liquid metal for series production of castings.
Der aufbereitete Formsand wird beim kastenlosen Formenstückherstellverfahren in der Regel mit ca. 2 bis 3 bar Druck aufweisenden Luft in die Kammern eingeblasen. Grundsätzlich besteht eine Kammer aus zwei Seitenplatten, zwei Modellplatten, einer Bodenplatte und einer Ober- bzw. Deckplatte. Zumeist sind die Seitenplatten und die Oberplatte mit Luftaustragsmitteln gegebenenfalls in Form von Ringschlitzen versehen, wobei in der Regel die Oberplatte auch eine spaltförmige Öffnung zum Einblasen des Formsandes besitzt.The processed molding sand is blown in the boxless molding production process usually with about 2 to 3 bar pressure having air into the chambers. Basically, a chamber consists of two side plates, two model plates, a bottom plate and a top or cover plate. In most cases, the side plates and the top plate are provided with Luftaustragsmitteln optionally in the form of annular slots, which usually has the upper plate and a gap-shaped opening for blowing the molding sand.
Der Formsand wirkt abrasiv auf die Begrenzungsplatten des Kammerraumes, sodass diese, auch Kammerplatten genannt, gemäß dem Stand der Technik aus einsatzgehärteten Stahlplatten hergestellt werden. Die Ringschlitze für den Luftaustrag in den dafür vorgesehenen Kammerplatten werden durchwegs derart erstellt, dass in vorgefertigte Bohrungen der einsatzgehärteten Stahlplatten mit einer Dicke von 15 mm bis 30 mm speziell geformte Düsenstücke eingepresst sind, deren Kopf zur Bohrungswand hin einen Abstand aufweist.The molding sand has an abrasive effect on the boundary plates of the chamber space, so that these, also called chamber plates, are made of case-hardened steel plates according to the prior art. The annular slots for the air discharge in the designated chamber plates are consistently created such that in prefabricated holes of the case-hardened steel plates are pressed with a thickness of 15 mm to 30 mm specially shaped nozzle pieces whose head has a distance to the bore wall.
Eine derartige aus einsatzgehärtetem Stahl bestehende Begrenzungsplatte für einen Kammerraum, welche Kammerplatte eine Vielzahl von mit Düsen bestückten Bohrungen zur Erstellung der Luftaustragsschlitze besitzt, kann durchaus die gewünschten Funktionen in einer Maschine zur Formenstückherstellung aufweisen, hat jedoch die Nachteile einer niedrigen Lebensdauer sowie einer aufwendigen Fertigung.Such a case hardened steel limiting plate for a chamber space, which chamber plate has a variety of holes equipped with nozzles for creating the Luftaustragsschlitze, may well have the desired functions in a machine for molding production, but has the disadvantages of a low life and a complex production.
Die Erfindung setzt sich nun zum Ziel, eine Begrenzungsplatte für einen Kammerraum der eingangs genannten Art zu schaffen, welche Platte wirtschaftlich hergestellt werden kann, eine höhere Verschleißfestigkeit sowie Lebensdauer aufweist und die gefordeten Gebrauchseigenschaften besitzt.The invention is now the goal of creating a boundary plate for a chamber chamber of the type mentioned, which plate can be produced economically, has a higher wear resistance and durability and has the required performance properties.
Dieses Ziel wird bei einem gattungsgemäßen Kammerraum erfindungsgemäß einerseits dadurch erreicht, dass zumindest eine für den Luftaustrag vorgesehene Begrenzungsplatte bzw. Kammerplatte aus einem verschleißfesten Werkstoff, zum Beispiel enthaltend in Gew.-% mehr als 1,0 Gew.-% Kohlenstoff (C) und mehr als 8,0 Gew.-% Chrom (Cr), gegebenenfalls weiters Anteile an Mangan (Mn), Molybdän (Mo), Wolfram (W) und Vanadin (V) als Hauptlegierungselemente gebildet ist und in dem (den) Bereich(en) für den Luftaustrag eine Vielzahl von gekrümmten Schlitzen aufweist.This object is achieved in a generic chamber chamber according to the invention, on the one hand, characterized in that at least one provided for the air discharge boundary plate or chamber plate made of a wear-resistant material, for example containing in wt .-% more than 1.0 wt .-% carbon (C) and more than 8.0% by weight of chromium (Cr), optionally further comprising proportions of manganese (Mn), molybdenum (Mo), tungsten (W) and vanadium (V) as main alloying elements, and in the region (s) ) has a plurality of curved slots for the air discharge.
Die mit der Erfindung erreichten Vorteile sind im Wesentlichen darin zu sehen, dass in einem verschleißfesten flächigen Werkstoff, der gegebenenfalls im Quettenverfahren thermisch vergütet sein kann, mit modernen Technologien, wie beispielsweise Laser-Elektronenstrahl- und dergleichen Verfahren, gekrümmte Schlitze in der erfoderlichen Dimension eingebracht werden können. Ein verschleißfester harter Werkstoff steigert nur bei mäßig höheren Materialkosten die Lebensdauer einer Platte überproportional. Dabei hat sich gemäß der Erfindung eine Krümmung der Schlitze als wesentlich herausgestellt, weil dadurch eine Resonanzanregung zur Schwingung der Stege die zu einem Stegbruch führen kann, verhindert wird.The advantages achieved by the invention are essentially to be seen in the fact that in a wear-resistant planar material, which may optionally be quenched thermally treated, introduced with modern technologies, such as laser electron beam and the like method, curved slots in the erfoderlichen dimension can be. A wear-resistant hard material increases the life of a plate disproportionately only with moderately higher material costs. In this case, according to the invention, a curvature of the slots has been found to be essential, because thereby a resonance excitation to the vibration of the webs which can lead to a web break is prevented.
Das Ziel der Erfindung wird bei einem Kammerraum der eingangs genannten Art auch dadurch erreicht, dass zumindest eine für den Luftaustrag vorgesehene Begrenzungsplatte bzw. Kammerplatte in Sandwich-Bauweise mit einer Trägerplatte und einer dem Innenraum zugewandten aus verschleißfestem Werkstoff gebildeten Hartschichtplatte ausgeformt ist und die Hartschichtplatte eine Vielzahl von gekrümmten Schlitzen aufweist, die mit den Luftaustragsmitteln der Trägerplatte korrespondieren.The object of the invention is also achieved in a chamber chamber of the type mentioned in that at least one provided for the air discharge boundary plate or chamber plate in sandwich construction with a support plate and a facing the interior of hard-wearing material formed hard layer plate is formed and the hard layer plate a Having a plurality of curved slots, which correspond to the air discharge means of the support plate.
Die mit dieser Ausgestaltung der Erfindung erzielten Vorteile bestehen insbesondere darin, dass auf Grund der Sandwich-Ausführung nur der höchst auf Abrasion beanspruchte dünne Teile der Kammerplatte aus verschleißfestem, meist mittel- bis hochlegierem Stahl gefertigt ist und ein stabiler Stützteil aus zähem Baustahl besteht. Es kann dabei auch von Vorteil sein, wenn die Luftaustragsschlitze in ein dünnes verschleißbeständiges Blech beispielsweise mittels Laserstrahls, eingebracht werden, weil dies, geometrisch bedingt, Vorteile betreffend eine Bearbeitungsgenauigkeit vermittelt.The advantages achieved by this embodiment of the invention are in particular that due to the sandwich design only the most highly stressed on abrasion thin parts of the chamber plate is made of wear-resistant, usually medium to high alloy steel and a stable support member made of tough structural steel. It may also be advantageous if the Luftaustragsschlitze in a thin wear-resistant sheet, for example by means of laser beam, are introduced, because this, due to geometric reasons, gives advantages regarding a machining accuracy.
Allenfalls sind die einzelnen Schlitze erfindungsgemäß gekrümmt ausgeführt, damit keine geraden Stege ausgeformt werden, die bei einer Anregung im Betrieb in Resonanz-Schwingungen gelangen können, welche auf Grund einer allgemeinen gegebenen Materialsprödigkeit von hochverschleißfesten Werkstoffen eine erhöhte Bruchgefahr darstellen.At most, the individual slots are designed according to the invention curved, so that no straight webs are formed, which can arrive at a stimulation during operation in resonant vibrations, which represent an increased risk of breakage due to a general given material brittleness of highly wear-resistant materials.
Von besonderer Wichtigkeit für eine Vermeidung einer Schlitz-System-Resonanz, aber auch für eine störungsfreie Funktion im Dauerbetrieb bei Vermeidung von Verblockungen kann es in einer Ausgestaltung der Erfindung günstig sein, dass die für einen Luftaustrag vorgesehenen gekrümmten Schlitze in der Kammerplatte oder in der Hartschichtplatte eine Form eines vorzugsweise runden, durch Stege unterbrochenen Ringschlitzes mit einer Breite von 0,4 bis 0,6 mm aufweisen.Of particular importance for avoiding a slot system resonance, but also for trouble-free operation in continuous operation while avoiding blockages, it may be favorable in one embodiment of the invention that provided for a Luftaustrag curved slots in the chamber plate or in the hard-layer plate a shape of a preferably round, interrupted by webs annular slot having a width of 0.4 to 0.6 mm.
Bei einer erfindungsgemäßen Sandwich-Bauweise einer Begrenzungsplatte kann es von Vorteil sein, wenn die Trägerplatte aus Baustahl, zum Beispiel einem Werkstoff 52,3 gefertigt ist und Entlüftungsbohrungen aufweist, dass die Hartschichtplatte beispielsweise auf einem Werkstoff Nr. 1.2601 nach Stahl-Eisen-Liste, eine Dicke von bis 3,8 mm hat und unterbrochene Ringschlitze besitzt, deren Lochbild bzw. Außendurchmesser und deren geometrische Anordnung mit dem der Entlüftungsbohrungen in der Trägerplatte übereinstimmen und dass die Trägerplatte und die Hartschichtplatte den Durchbrüchen gemäß passgenau gefügt ist.In a sandwich construction of a boundary plate according to the invention, it may be advantageous if the support plate is made of structural steel, for example a material 52.3 and has vent holes, that the hard-layer plate, for example, on a material No. 1.2601 steel-iron list, has a thickness of up to 3.8 mm and has interrupted ring slots whose hole pattern or outer diameter and their geometric arrangement with the vent holes in the support plate match and that the support plate and the hard-coated plate is fitted to the openings according to fit.
Der Vorteil liegt bei einer derartigen Ausführungsform der Kammerplatte, wie gefunden wurde, einerseits in einer wirtschaftlichen bzw. kostengünstigen Fertigung und Bearbeitung, wobei insbesondere die Trägerplatte geringe Werkstoffkosten besitzt, andererseits werden überragende Gebrauchseigenschaften mit hoher Plattenstabilität erreicht.The advantage lies in such an embodiment of the chamber plate, as was found, on the one hand in an economical or cost-effective production and processing, in particular, the support plate has low material costs, on the other hand outstanding performance characteristics are achieved with high plate stability.
Wenn weiteres in einer günstigen Ausführungsform der Erfindung das Fügen der Sandwich-Platten durch Kleben, zum Beispiel mittels eines handelsüblichen Metallklebers, erstellt ist, kann die Fertigungstechnik weiter vereinfacht und die Abstützung sowie die Dämpfung der Hartschichtplatte verbessert werden.Further, in a favorable embodiment of the invention, the joining of the sandwich panels by adhesion, for example by means of a commercially available metal adhesive is created, the manufacturing technology can be further simplified and the support and the damping of the hard-coated plate can be improved.
Zur Erhöhung der Standzeit der Begrenzungsplatten im harten Betrieb mit Quarzsanden kann vorgesehen sein, dass diese oder die Hartschicht einer Sandwichplatte aus einem Werkzeugstahl gebildet ist und ein durch thermisches Vergüten höchste Verschleißfestigkeit und Zähigkeit aufweisendes Gefüge besitzt.To increase the service life of the boundary plates in hard operation with quartz sands can be provided that this or the hard layer of a sandwich plate is formed from a tool steel and has a thermal wear by highest wear resistance and toughness-containing structure.
An Hand von lediglich einen Ausführungsweg darstellenden Zeichungen soll die Erfindung näher erläutert werden. Es zeigt:
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Fig.1 eine als Ober- oder Deckplatte ausgeformte erfindungsgemäße Begrenzungsplatte eines Kammerraumes -
Fig. 2 einen Querschnitt durch eine Sandwichplatte im Bereich einer Entlüftungsbohrung -
Fig. 3 eine Draufsicht auf einen Ringschlitz in einer Kammerplatte
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Fig.1 a shaped as top or top plate inventive boundary plate of a chamber space -
Fig. 2 a cross section through a sandwich plate in the region of a vent hole -
Fig. 3 a plan view of a ring slot in a chamber plate
In
Claims (6)
- Boundary plate for a chamber space for establishing a piece of mould of at least one casting mould, wherein prepared moulding sand is injected for forming a piece of mould by pressurised air into a chamber space, which encloses a model, and air is evacuated through slots in at least one of the boundary plates of said chamber space, characterised in that at least one boundary plate or chamber plate (1), which is provided for evacuating air, is formed of a wear resistant material and comprises a plurality of curved slots (2) in the region(s) provided for the evacuation of air.
- Boundary plate for a chamber space for establishing a piece of mould of at least one casting mould, wherein prepared moulding sand is injected for forming a piece of mould by pressurised air into a chamber space, which encloses a model, and air is evacuated through slots in at least one of the boundary plates or chamber plates of said chamber space, characterised in that at least one boundary plate or chamber plate (1), which is provided for evacuating air, is formed in a sandwich construction comprising a carrier plate (11) and a hard layer plate (12) of wear resistant material and facing the inner space, wherein said hard layer plate (12) comprises a plurality of curved slots (2) corresponding to the air evacuation means (111) of said carrier plate (11).
- Boundary plate according to claim 1 or 2, characterised in that the curved slots (2), which are provided for evacuating air, and which are either in the chamber plate (1) or in the hard layer plate (12) have the shape of a preferably round annular slot (R) interrupted by straps (21), which has a width (21) of 0.4 to 0.6 mm.
- Boundary plate according to claim 2, characterised in that the carrier plate (11) is produced of structural steel, for example of a material 52,3, and has evacuating boreholes (111), that the hard layer plate (12) is, for example, of a material No. 1.2601 according to the Stahl-Eisen-Liste, has a thickness (121) of up to 3.8 mm and an interrupted annular slot (2), the pinhole image or outer diameter (23) of which and the geometrical arrangement of which coincide with those of the evacuating boreholes (111) in the carrier plate (11), and that the carrier plate (11) and the hard layer plate (12) are joint in an accurately fitting manner in accordance with the openings (2, 111).
- Boundary plate according to claim 2 or 3, characterised in that joining the sandwich plates (11, 12) is made by cementing, for example by means of a commercial metal bonding agent.
- Boundary plate according to any of claims 1 to 4, characterised in that said boundary plate (1) or said hard layer plate (12) is are formed of a tool steel and, by thermally annealing, has a structure of maximum wear resistance and toughness.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT04450106T ATE408468T1 (en) | 2003-06-17 | 2004-05-11 | DEVICE FOR CREATING MOLDS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0094203A AT413949B (en) | 2003-06-17 | 2003-06-17 | DEVICE FOR CREATING MOLDING |
AT9422003 | 2003-06-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1488872A1 EP1488872A1 (en) | 2004-12-22 |
EP1488872B1 true EP1488872B1 (en) | 2008-09-17 |
Family
ID=33314969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04450106A Expired - Lifetime EP1488872B1 (en) | 2003-06-17 | 2004-05-11 | Device for the manufacture of casting moulds |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1488872B1 (en) |
AT (2) | AT413949B (en) |
DE (1) | DE502004008073D1 (en) |
DK (1) | DK1488872T3 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT197976B (en) * | 1957-05-08 | 1958-05-27 | Dkfm Ing Walter Krivan | Vent cylinder closed on one side for core shooting |
DE2916465C2 (en) * | 1979-04-24 | 1981-08-27 | Gottfried 6335 Lahnau Zimmermann | Nozzle for venting, venting or steaming molds |
DE3836622C1 (en) * | 1987-10-31 | 1989-06-08 | Harry 5608 Radevormwald De Post | |
RU1780917C (en) * | 1989-06-29 | 1992-12-15 | Научно-Производственное Объединение Технологии Автомобильной Промышленности | Method and device for manufacturing one-time casting molds |
DE4229810C2 (en) * | 1991-09-27 | 1995-02-23 | Georg Fischer Giesereianlagen | Model plate carrier for compression processes subjected to compressed air |
EP0665100A1 (en) * | 1993-12-28 | 1995-08-02 | CARL AUG. PICARD GMBH & CO. KG. | Working table top |
ATE160713T1 (en) * | 1993-12-28 | 1997-12-15 | Picard Fa Carl Aug | LINING PLATE FOR MOLD CHAMBERS |
-
2003
- 2003-06-17 AT AT0094203A patent/AT413949B/en not_active IP Right Cessation
-
2004
- 2004-05-11 DK DK04450106T patent/DK1488872T3/en active
- 2004-05-11 DE DE502004008073T patent/DE502004008073D1/en not_active Expired - Lifetime
- 2004-05-11 AT AT04450106T patent/ATE408468T1/en not_active IP Right Cessation
- 2004-05-11 EP EP04450106A patent/EP1488872B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1488872A1 (en) | 2004-12-22 |
AT413949B (en) | 2006-07-15 |
ATA9422003A (en) | 2005-11-15 |
ATE408468T1 (en) | 2008-10-15 |
DE502004008073D1 (en) | 2008-10-30 |
DK1488872T3 (en) | 2009-02-02 |
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