EP0661121B1 - Plaque de revêtement pour chambres de moulage - Google Patents

Plaque de revêtement pour chambres de moulage Download PDF

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Publication number
EP0661121B1
EP0661121B1 EP93120995A EP93120995A EP0661121B1 EP 0661121 B1 EP0661121 B1 EP 0661121B1 EP 93120995 A EP93120995 A EP 93120995A EP 93120995 A EP93120995 A EP 93120995A EP 0661121 B1 EP0661121 B1 EP 0661121B1
Authority
EP
European Patent Office
Prior art keywords
plate
moulding
base plate
wearing plate
lining panel
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
EP93120995A
Other languages
German (de)
English (en)
Other versions
EP0661121A1 (fr
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
Original Assignee
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.)
Filing date
Publication date
Application filed by Picard Carl Aug GmbH and Co KG filed Critical Picard Carl Aug GmbH and Co KG
Priority to DE59307797T priority Critical patent/DE59307797D1/de
Priority to EP93120995A priority patent/EP0661121B1/fr
Priority to AT93120995T priority patent/ATE160713T1/de
Priority to EP94119919A priority patent/EP0665100A1/fr
Publication of EP0661121A1 publication Critical patent/EP0661121A1/fr
Application granted granted Critical
Publication of EP0661121B1 publication Critical patent/EP0661121B1/fr
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
    • 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 according to the preamble of patent claim 1.
  • 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 strongly 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 not hardened.
  • 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.
  • EP-A-315087 describes a lining plate for the molding space of boxless molding machines, in which an inner wear plate is fastened to an outer carrier plate with the aid of holding magnets and is additionally positively secured against axial relative movement.
  • the wear plate and the support plate are provided with congruent circular openings which serve in the wear plate for receiving nozzle inserts and in the support plate as air outlet openings.
  • the production of such a plate necessarily involves the separate production of both the plate parts provided with the openings on the one hand and the nozzle inserts on the other hand, the latter then having to be fitted into the openings of the wear plate while taking precise tolerance measures into account.
  • WO-A-8404711 also treats a lining plate for the molding space of boxless molding machines with uniformly prefabricated nozzle-like inserts, whereby to adjust a size of the nozzle openings corresponding to the grain size of the molding sand to be processed, it is proposed that the nozzles of the inserts be conical towards the outside from the nozzle openings expand, attach the inserts more or less deep in holes in the lining plate according to the desired size of the nozzle openings and then grind the inserts flat with the inner surface of the lining plate.
  • FR-A-2217137 discloses a mold, which can be assembled from two half parts, for shaping plastic materials, in which a perforation in the micrometer range is produced in a certain zone near an air collecting space by laser treatment. This perforation is imperceptible to the eye and is intended to promote the escape of the air trapped during the shaping.
  • the venting of the mold through the capillaries is very slow despite an increase in pressure due to the compression of the air that occurs when the material to be molded is filled in, and there is also the risk that the hair-fine channels become blocked by condensation products. For this reason, an additional external suction or, after repeated use of the mold, a renewed laser treatment to open further capillaries must be provided.
  • the present invention has for its object to provide a lining plate with high wear resistance in the relevant area, which is characterized by a simplified production.
  • the ventilation nozzles of a generic lining plate are designed as slots which run parallel to one another and are produced in the wear plate by laser beam technology are, which widen slightly conically from the inner surface to the outer surface of the wear plate, the side of the wear plate on which the laser beam strikes during processing forms the inner surface to the cavity of the molding chamber.
  • the lining plate is composed of an inner wear plate and an outer base plate, there are considerable cost advantages with regard to the material selection, 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 will.
  • 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 to 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 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 0.16% C, 0.25% Si, 1.15% Mn and 0.95% Cr.

Landscapes

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

Claims (6)

  1. Plaque de garniture pour chambres de moulage (1) prévues dans des machines à mouler pour réaliser des blocs de moulage ou moules de fonte, plaque dans laquelle une plaque d'usure interne (8) est fixée à une plaque externe (7) du corps de base, et dans laquelle de nombreuses régions partielles sont munies de buses d'aération (13) logées uniquement dans la plaque d'usure (8), tandis que la plaque (7) du corps de base présente dans la région des buses d'aération (13), des ouvertures (9) de sortie d'air,
    caractérisée en ce que les buses d'aération (13) ont la forme de fentes (14) parallèles entre elles réalisées dans la plaque d'usure (8) par la technique de rayons laser, ces fentes s'élargissant faiblement de manière conique depuis la face interne vers la face externe de la plaque d'usure (8), la face de la plaque d'usure (8) heurtée par le rayon laser lors de l'usinage formant la face interne par rapport à l'espace creux de la chambre de moulage (1).
  2. Plaque de garniture selon la revendication 1,
    caractérisée en ce que la fixation de la plaque d'usure (8) sur la plaque (7) du corps de base est effectuée au moyen d'une colle thermorésistante à deux composants appliquée par bandes ou par points.
  3. Plaque de garniture selon la revendication 2,
    caractérisée en ce que la colle à deux composants est constituée par une résine, telle qu'une résine époxy, et un durcisseur, tel qu'un polyaminomide.
  4. Plaque de garniture selon l'une des revendications précédentes,
    caractérisée en ce que des goujons de cisaillement (12) sont disposés entre la plaque d'usure (8) et la plaque (7) du corps de base, en particulier dans les régions situées en dehors des blocs de moulage à réaliser.
  5. Plaque de garniture selon l'une des revendications précédentes,
    caractérisée en ce que la plaque d'usure (8) est durcie et consiste en un acier à 1,55% de C, 12% de Cr, 0,7% de Mo et 1,0% de V.
  6. Plaque de garniture selon l'une des revendications précédentes,
    caractérisée en ce que la plaque (7) du corps de base est réalisée en un acier à 0,16% de C, 0,25% de Si, 1,15% de Mn et 0,95% de Cr.
EP93120995A 1993-12-28 1993-12-28 Plaque de revêtement pour chambres de moulage Expired - Lifetime EP0661121B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59307797T DE59307797D1 (de) 1993-12-28 1993-12-28 Auskleidungsplatte für Formkammern
EP93120995A EP0661121B1 (fr) 1993-12-28 1993-12-28 Plaque de revêtement pour chambres de moulage
AT93120995T ATE160713T1 (de) 1993-12-28 1993-12-28 Auskleidungsplatte für formkammern
EP94119919A EP0665100A1 (fr) 1993-12-28 1994-12-16 Plan de travail

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93120995A EP0661121B1 (fr) 1993-12-28 1993-12-28 Plaque de revêtement pour chambres de moulage

Publications (2)

Publication Number Publication Date
EP0661121A1 EP0661121A1 (fr) 1995-07-05
EP0661121B1 true EP0661121B1 (fr) 1997-12-03

Family

ID=8213537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93120995A Expired - Lifetime EP0661121B1 (fr) 1993-12-28 1993-12-28 Plaque de revêtement pour chambres de moulage

Country Status (3)

Country Link
EP (1) EP0661121B1 (fr)
AT (1) ATE160713T1 (fr)
DE (1) DE59307797D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004112989A1 (fr) * 2003-06-16 2004-12-29 Carl Aug. Picard Gmbh & Co. Kg Plaque de revetement pour cavites de moule

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5967221A (en) * 1997-03-26 1999-10-19 Georg Fischer Disa A/S Detachable wear plate suitable for foundry equipment and for conveying green sand moulds
AT413949B (de) * 2003-06-17 2006-07-15 Boehler Bleche Multilayer Gmbh Einrichtung zur erstellung von giessformen
US9662706B2 (en) 2008-10-06 2017-05-30 Disa Industries A/S Lining plate for lining of moulding chambers of moulding machines
DE202011101449U1 (de) * 2011-05-27 2012-08-28 Carl Aug. Picard GmbH "Verschleißteil zur Befestigung an einem Konstruktionsteil, insbesondere Verschleißplatte oder -leiste für eine Gießereimaschine"

Family Cites Families (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
DE3319463C2 (de) * 1983-05-28 1985-09-19 Carl Aug. Picard GmbH & Co KG, 5630 Remscheid Auskleidungsplatte für den Formraum an Formmaschinen
DE3836622C1 (fr) * 1987-10-31 1989-06-08 Harry 5608 Radevormwald De Post

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004112989A1 (fr) * 2003-06-16 2004-12-29 Carl Aug. Picard Gmbh & Co. Kg Plaque de revetement pour cavites de moule

Also Published As

Publication number Publication date
ATE160713T1 (de) 1997-12-15
EP0661121A1 (fr) 1995-07-05
DE59307797D1 (de) 1998-01-15

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