EP0661121A1 - Plaque de revêtement pour chambres de moulage - Google Patents

Plaque de revêtement pour chambres de moulage Download PDF

Info

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
Authority
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
Other languages
German (de)
English (en)
Other versions
EP0661121B1 (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 AT93120995T priority Critical patent/ATE160713T1/de
Priority to EP93120995A priority patent/EP0661121B1/fr
Priority to DE59307797T priority patent/DE59307797D1/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, 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.

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)
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
AT93120995T ATE160713T1 (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
DE59307797T DE59307797D1 (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 true EP0661121A1 (fr) 1995-07-05
EP0661121B1 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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042461A1 (fr) * 1997-03-26 1998-10-01 Georg Fischer Disa A/S Agencement de materiel de fonderie comprenant par exemple une machine a mouler et une installation d'acheminement de moules en sable vert
AT413949B (de) * 2003-06-17 2006-07-15 Boehler Bleche Multilayer Gmbh Einrichtung zur erstellung von giessformen
WO2010041091A1 (fr) * 2008-10-06 2010-04-15 Disa Industries A/S Plaque de revêtement pour le revêtement de chambres de moulage de machines de moulage
WO2012163434A1 (fr) * 2011-05-27 2012-12-06 Carl Aug. Picard GmbH Pièce d'usure destinée à être fixée à un élément de construction, en particulier plaque ou barre d'usure destinée à une machine de fonderie

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20309389U1 (de) * 2003-06-16 2003-08-28 Picard Fa Carl Aug Auskleidungsplatte für Formkammern

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 (fr) * 1983-05-28 1984-12-06 Picard Fa Carl Aug Plaque de revetement pour la chambre de moulage d'une machine a mouler
EP0315087A1 (fr) * 1987-10-31 1989-05-10 Harry Post Plaque de revêtement pour la chambre de moulage de machines à mouler sans châssis

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 (fr) * 1983-05-28 1984-12-06 Picard Fa Carl Aug Plaque de revetement pour la chambre de moulage d'une machine a mouler
EP0315087A1 (fr) * 1987-10-31 1989-05-10 Harry Post Plaque de revêtement pour la chambre de moulage de machines à mouler sans châssis

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042461A1 (fr) * 1997-03-26 1998-10-01 Georg Fischer Disa A/S Agencement de materiel de fonderie comprenant par exemple une machine a mouler et une installation d'acheminement de moules en sable vert
AT413949B (de) * 2003-06-17 2006-07-15 Boehler Bleche Multilayer Gmbh Einrichtung zur erstellung von giessformen
WO2010041091A1 (fr) * 2008-10-06 2010-04-15 Disa Industries A/S Plaque de revêtement pour le revêtement de chambres de moulage de machines de moulage
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 (fr) * 2011-05-27 2012-12-06 Carl Aug. Picard GmbH Pièce d'usure destinée à être fixée à un élément de construction, en particulier plaque ou barre d'usure destinée à une machine de fonderie

Also Published As

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

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