EP1488872B1 - Einrichtung zur Erstellung von Giessformen - Google Patents

Einrichtung zur Erstellung von Giessformen Download PDF

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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
Authority
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
Application number
EP04450106A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1488872A1 (de
Inventor
Erling Olsen
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.)
Boehler Bleche Multilayer GmbH
Original Assignee
Boehler Bleche Multilayer GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boehler Bleche Multilayer GmbH filed Critical Boehler Bleche Multilayer GmbH
Priority to AT04450106T priority Critical patent/ATE408468T1/de
Publication of EP1488872A1 publication Critical patent/EP1488872A1/de
Application granted granted Critical
Publication of EP1488872B1 publication Critical patent/EP1488872B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 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.

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)
  • Control Of Heat Treatment Processes (AREA)
  • Connection Of Plates (AREA)
EP04450106A 2003-06-17 2004-05-11 Einrichtung zur Erstellung von Giessformen Expired - Lifetime EP1488872B1 (de)

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 EP1488872A1 (de) 2004-12-22
EP1488872B1 true 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 (da)
AT (2) AT413949B (da)
DE (1) DE502004008073D1 (da)
DK (1) DK1488872T3 (da)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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
DE2916465C2 (de) * 1979-04-24 1981-08-27 Gottfried 6335 Lahnau Zimmermann Düse zum Entlüften, Belüften oder Bedampfen von Formen
DE3836622C1 (da) * 1987-10-31 1989-06-08 Harry 5608 Radevormwald De Post
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
EP0665100A1 (de) * 1993-12-28 1995-08-02 CARL AUG. PICARD GMBH & CO. KG. Arbeitsplatte
ATE160713T1 (de) * 1993-12-28 1997-12-15 Picard Fa Carl Aug Auskleidungsplatte für formkammern

Also Published As

Publication number Publication date
ATA9422003A (de) 2005-11-15
DK1488872T3 (da) 2009-02-02
AT413949B (de) 2006-07-15
DE502004008073D1 (de) 2008-10-30
ATE408468T1 (de) 2008-10-15
EP1488872A1 (de) 2004-12-22

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