EP1488872A1 - Einrichtung zur Erstellung von Giessformen - Google Patents
Einrichtung zur Erstellung von Giessformen Download PDFInfo
- Publication number
- EP1488872A1 EP1488872A1 EP04450106A EP04450106A EP1488872A1 EP 1488872 A1 EP1488872 A1 EP 1488872A1 EP 04450106 A EP04450106 A EP 04450106A EP 04450106 A EP04450106 A EP 04450106A EP 1488872 A1 EP1488872 A1 EP 1488872A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- boundary
- chamber
- chamber space
- air
- 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
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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 creation a molding at least one casting mold, with prepared molding sand for Fitting with compressed air in the chamber space enclosing a model blown and the air through slots in at least one of the boundary plates of the chamber space is carried out.
- Castings are increasingly used in modern technology, because this due to the improved manufacturing process, the increased quality of the Cast metal and the possibility of largely automated Manufacturing technology high product quality and economy especially in one Have series production.
- Casting molds can be produced in the box and boxless process, whereby at the first two boxes, each with a model half filled with foundry sand and after compacting the sand positioned congruently to each other and ready for casting.
- a boxless mold production developed special facilities.
- a by panels delimit chamber space, with two opposing panels Wear model parts and are movable to each other.
- At least one more record has a mostly gap-shaped, wider opening through which molding sand can be blown in, for a discharge of the blowing air from the Chamber space narrow slits are provided in the other plate (s).
- the boxless process takes place after the Chamber space with foundry sand in the blowing process a mutual approach the model plates and thus further compacting the sand, after which a Fitted with a fashion structure on both sides and can be provided.
- Another molding is with the The counter model structure fits closely to the prefabricated, whereby a plurality of similar mold cavities in a row of moldings is formed, which is filled with liquid metal for the serial production of castings can be.
- the processed molding sand is used in the boxless molding manufacturing process in usually blown into the chambers with air at a pressure of approx. 2 to 3 bar.
- a chamber consists of two side plates, two model plates, a base plate and a top or cover plate.
- the molding sand has an abrasive effect on the boundary plates of the chamber space, so that this, also called chamber plates, according to the prior art case-hardened steel plates.
- the ring slots for the Air discharge in the chamber plates provided for this are consistently such created that in pre-drilled holes of the case-hardened steel plates with a Thicknesses from 15 mm to 30 mm specially shaped nozzle pieces are pressed, the Head has a distance from the bore wall.
- Such a case plate made of case hardened steel for one Chamber space which chamber plate a variety of nozzles equipped Has holes for creating the air discharge slots, can have the desired functions in a molding machine, However, it has the disadvantages of a short lifespan and an expensive one Production.
- the invention now aims to provide a boundary plate for one Chamber space of the type mentioned to create which plate economically can be produced, a higher wear resistance and durability has and has the required performance.
- This goal is achieved according to the invention in a generic chamber space achieved on the one hand 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% by weight more than 1.0% by weight carbon (C) and more than 8.0% by weight chromium (Cr), optionally further proportions of manganese (Mn), molybdenum (Mo), tungsten (W) and vanadium (V) are formed as main alloy elements and in a plurality of curved slots in the air discharge area (s) having.
- the aim of the invention is in a chamber of the type mentioned also achieved in that at least one intended for air discharge Boundary plate or chamber plate in sandwich construction with a carrier plate and one formed from wear-resistant material facing the interior Hard layer plate is molded and the hard layer plate a variety of has curved slots with the air discharge means of the carrier plate correspond.
- the advantages achieved with this embodiment of the invention are in particular in that due to the sandwich design only the most abrasion stressed thin parts of the chamber plate made of wear-resistant, mostly medium to is made of high-alloy steel and a stable supporting part made of tough structural steel consists. It can also be advantageous if the air discharge slots are in one thin, wear-resistant sheet metal, for example using a laser beam, be introduced, because this, due to the geometry, has advantages regarding a Machining accuracy conveyed.
- the individual slots are curved according to the invention, so no straight webs are formed which, when excited during operation Resonance vibrations can occur, which are due to a general given material brittleness of highly wear-resistant materials an increased Show risk of breakage.
- blocking may be favorable for the for curved air slots provided in the chamber plate or in the hard layer plate a shape of a preferably round, by webs have interrupted ring slot with a width of 0.4 to 0.6 mm.
- the carrier plate made of structural steel, for example a material 52.3 is manufactured and has ventilation holes that the hard layer plate for example on a material no. 1.2601 according to the steel-iron list, a thickness of up to 3.8 mm and has interrupted ring slots whose hole pattern or Outside diameter and their geometric arrangement with that of Vent holes in the backing plate match and that the backing plate and the hard-laminated board is fitted according to the openings.
- the joining of the Sandwich panels by gluing for example using a commercially available Metal adhesive, is created, the manufacturing technology can be further simplified and the Support and the damping of the hard layer plate can be improved.
- this or the hard layer Sandwich plate is formed from a tool steel and one by thermal Temper has the highest wear resistance and toughness.
- Fig. 1 shows a top view of the chamber interior of an upper or cover plate 1.
- a plate 12 made homogeneously or according to a sandwich construction is one
- Fasteners 123 are provided.
- a carrier plate 11 which has ventilation bores 111, is such with a hard layer plate 12 with a thickness 121 connected or joined flat, that ring slots 2 in the hard layer plate 12 within the bore 111 of the Carrier plate 11 are positioned.
- Fig. 3 shows a slit image or a top view of the chamber interior onto one Ring slot 2 in a boundary plate 1.
- a ring slot 2 with one Outer diameter 23 has a slot width 22 and webs with a width 21. In the embodiment shown with three webs 21, these must be Bridge areas shear forces due to a higher pressure in the chamber and the inside of the ring slot. Resonance vibrations of a part are in the Operation not given.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Devices For Molds (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Connection Of Plates (AREA)
- Control Of Heat Treatment Processes (AREA)
Abstract
Description
Claims (6)
- 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, dadurch gekennzeichnet, dass zumindest eine für den Luftaustrag vorgesehene Begrenzungsplatte bzw. Kammerplatte (1) 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 den Bereich(en) für den Luftaustrag eine Vielzahl von gekrümmten Schlitzen (2) aufweist.
- 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 bzw. Kammerplatten des Kammerraumes ausgetragen wird, dadurch gekennzeichnet, dass zumindest eine für den Luftaustrag vorgesehene Begrenzungsplatte bzw. Kammerplatte (1) in Sandwich-Bauweise mit einer Trägerplatte (11) und einer dem Innenraum zugewandten aus verschleißfestem Werkstoff gebildeten Hartschichtplatte (12) ausgeformt ist und die Hartschichtplatte (12) eine Vielzahl von gekrümmten Schlitzen (2) aufweist, die mit den Luftaustragsmitteln (111) der Trägerplatte (11) korrespondieren.
- Begrenzungsplatte nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die für einen Luftaustrag vorgesehenen gekrümmten Schlitze (2) in der Kammerplatte (1) oder in der Hartschichtplatte (12) eine Form eines vorzugsweise runden, durch Stege (21) unterbrochenen Ringschlitzes (R) mit einer Breite (21) von 0,4 bis 0,6 mm aufweisen.
- Begrenzungsplatte nach Anspruch 2, dadurch gekennzeichnet, dass die Trägerplatte (11) aus Baustahl, zum Beispiel einem Werkstoff 52,3, gefertigt ist und Entlüftungsbohrungen (111) aufweist, dass die Hartschichtplatte (12) beispielsweise aus einem Werkstoff Nr. 1.2601 nach Stahl-Eisen-Liste, eine Dicke (121) von bis 3,8 mm hat und einen unterbrochenen Ringschlitz (2) besitzt, deren Lochbild bzw. Außendurchmesser ( 23) und deren geometische Anordnung mit dem der Entlüftungsbohrungen (111) in der Trägerplatte (11) übereinstimmen und dass die Trägerplatte (11) und die Hartschichtplatte (12) den Durchbrüchen (2,111) gemäß passgenau gefügt ist.
- Begrenzungspalte nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das Fügen der Sandwich-Platten (11,12) durch Kleben, zum Beispiel mittels eines handelsüblichen Metallklebers, erstellt ist.
- Begrenzungsplatte nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet , dass die Begrenzungsplatte (1) oder die Hartschichtplatte (12) aus einem Werkzeugstahl gebildet ist und ein durch thermisches Vergüten höchste Verschleißfestigkeit und Zähigkeit aufweisendes Gefüge besitzt.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT04450106T ATE408468T1 (de) | 2003-06-17 | 2004-05-11 | Einrichtung zur erstellung von giessformen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0094203A AT413949B (de) | 2003-06-17 | 2003-06-17 | Einrichtung zur erstellung von giessformen |
AT9422003 | 2003-06-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1488872A1 true EP1488872A1 (de) | 2004-12-22 |
EP1488872B1 EP1488872B1 (de) | 2008-09-17 |
Family
ID=33314969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04450106A Expired - Lifetime EP1488872B1 (de) | 2003-06-17 | 2004-05-11 | Einrichtung zur Erstellung von Giessformen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1488872B1 (de) |
AT (2) | AT413949B (de) |
DE (1) | DE502004008073D1 (de) |
DK (1) | DK1488872T3 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT197976B (de) * | 1957-05-08 | 1958-05-27 | Dkfm Ing Walter Krivan | Einseitig geschlossener Entlüftungszylinder zum Kernschießen |
EP0315087A1 (de) * | 1987-10-31 | 1989-05-10 | Harry Post | Auskleidungsplatte für den Formraum von kastenlosen Formmaschinen |
EP0665100A1 (de) * | 1993-12-28 | 1995-08-02 | CARL AUG. PICARD GMBH & CO. KG. | Arbeitsplatte |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2916465C2 (de) * | 1979-04-24 | 1981-08-27 | Gottfried 6335 Lahnau Zimmermann | Düse zum Entlüften, Belüften oder Bedampfen von Formen |
RU1780917C (ru) * | 1989-06-29 | 1992-12-15 | Научно-Производственное Объединение Технологии Автомобильной Промышленности | Способ изготовлени разовых литейных форм и устройство дл его осуществлени |
DE4229810C2 (de) * | 1991-09-27 | 1995-02-23 | Georg Fischer Giesereianlagen | Modellplattenträger für druckluftbeaufschlagte Verdichtungsverfahren |
ATE160713T1 (de) * | 1993-12-28 | 1997-12-15 | Picard Fa Carl Aug | Auskleidungsplatte für formkammern |
-
2003
- 2003-06-17 AT AT0094203A patent/AT413949B/de not_active IP Right Cessation
-
2004
- 2004-05-11 AT AT04450106T patent/ATE408468T1/de not_active IP Right Cessation
- 2004-05-11 DK DK04450106T patent/DK1488872T3/da active
- 2004-05-11 EP EP04450106A patent/EP1488872B1/de not_active Expired - Lifetime
- 2004-05-11 DE DE502004008073T patent/DE502004008073D1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT197976B (de) * | 1957-05-08 | 1958-05-27 | Dkfm Ing Walter Krivan | Einseitig geschlossener Entlüftungszylinder zum Kernschießen |
EP0315087A1 (de) * | 1987-10-31 | 1989-05-10 | Harry Post | Auskleidungsplatte für den Formraum von kastenlosen Formmaschinen |
EP0665100A1 (de) * | 1993-12-28 | 1995-08-02 | CARL AUG. PICARD GMBH & CO. KG. | Arbeitsplatte |
Also Published As
Publication number | Publication date |
---|---|
DE502004008073D1 (de) | 2008-10-30 |
AT413949B (de) | 2006-07-15 |
ATA9422003A (de) | 2005-11-15 |
EP1488872B1 (de) | 2008-09-17 |
ATE408468T1 (de) | 2008-10-15 |
DK1488872T3 (da) | 2009-02-02 |
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