EP2585239A1 - Cuve de moulage en modele perdu - Google Patents
Cuve de moulage en modele perduInfo
- Publication number
- EP2585239A1 EP2585239A1 EP11728352.3A EP11728352A EP2585239A1 EP 2585239 A1 EP2585239 A1 EP 2585239A1 EP 11728352 A EP11728352 A EP 11728352A EP 2585239 A1 EP2585239 A1 EP 2585239A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- cooler
- model
- walls
- grooves
- 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
Links
- 238000000465 moulding Methods 0.000 title abstract description 17
- 238000001816 cooling Methods 0.000 claims description 9
- 239000003110 molding sand Substances 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 238000007711 solidification Methods 0.000 description 6
- 230000008023 solidification Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010112 shell-mould casting Methods 0.000 description 3
- 238000004138 cluster model Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Definitions
- the invention relates to a mold cavity in a lost model.
- the molding principle using a lost model is well suited to the production of complex parts, especially those implementing a model without the possibility of demolding.
- the model is made of fusible or sublimable material. It can be achieved by assembling several parts giving the shape of the part or parts to be made as well as filling systems, supply and possibly feeder necessary for molding.
- the model is for example made of wax, polystyrene or urea. It is common to make a cluster model thus making it possible to produce several pieces simultaneously.
- the model is placed in a tank that is filled with molding sand.
- the model After filling sand, in the case of a fuse material, the model is removed by melting it before casting the metal forming the part to be produced. In the case of a sublimable material the molten metal is directly poured into the mold and its temperature is sufficient to sublimate the model which is evacuated by the porosity of the sand.
- the invention aims to improve the lost pattern molding process by increasing the cooling rate without degrading the cycle time.
- the subject of the invention is a molded model casting vessel, characterized in that it comprises at least one cooler forming a wall of the vessel, in that an outer face of the cooler comprises means allowing a heat exchange greater than that obtained with walls of the tank without a cooler and in that an inner face of the cooler is intended to come into contact with a model placed in the tank.
- the means for heat exchange include for example fins for cooling the vessel by convection.
- At least two opposite walls of the tank may each be formed by a cooler ensuring the maintenance of the model. These walls both have a substantially flat inner face. To maintain the model in position in the tank, the planes in which the inner faces extend can form between them an acute angle so that the model is placed by gravity in the tank bearing against the inner faces. We can balance the support of the model on the inner faces. To do this, the inner faces are symmetrical with respect to a vertical plane.
- the inner face of the cooler comprises grooves. Vertices of the grooves are intended to come into contact with the model. The grooves are oriented vertically so that molding sand can flow by gravity into the grooves when filling the tank.
- FIG. 1 represents in perspective a molding tank whose walls are formed by coolers, the tank containing a cluster model;
- FIG. 2 represents in section the molding vessel of FIG. 1;
- Figures 3 and 4 show in perspective a portion of the molding vessel of Figure 1;
- FIGS. 5 and 6 show in detail examples of internal faces of the coolers forming the walls of the tank.
- FIG. 1 represents a molding vat 10 intended to allow a lost model molding operation.
- a model January 1 is present in the tank 1 0.
- the tank has substantially the shape of a parallelepiped bin.
- the manufacture of the mold is done by filling the tank 10 of sand around the model 1 1.
- the sand can be packed around the model 1 1 by subjecting the tank 1 0 to vibrations during the filling of sand.
- the cooler 1 3 is particularly visible and its face 1 5, external to the tank 1 0, comprises fins 1 6 for cooling the vessel 1 0 by convection. More generally, the fins 1 6 allow a higher heat exchange than that obtained with walls 1 7 and 1 8 of the tank 1 0 without cooler.
- the cooling can be obtained by natural or forced convection with the ambient air surrounding the tank 10 during the solidification of the metal intended to take the form of the model January 1. It is possible to change the convection during a molding cycle in order to adapt the cooling rate of the cast metal in the tank 10 to obtain a desired metallographic structure or to accelerate the molding cycle time.
- FIG. 2 represents, in section along a vertical plane, the tank 10 of FIG. 1.
- the model 1 1 is supported on the two coolers 13 and 14.
- the model 1 1 comprises the forms 19 and 20 of two parts to achieve. These forms 19 and 20 are connected by the supply system 12.
- Each of the forms 19 and 20 is supported on one of the coolers 13 and 14, thus allowing a significant heat exchange between the metal filling each form 19 and 20 and the cooler corresponding 13 and 14.
- the invention can be implemented in the manufacture of aluminum alloy cylinder head implemented in the automotive industry.
- This type of part comprises a large flat face intended to come into contact with a cylinder block via a cylinder head gasket.
- the large surface of the flat faces of the cylinder heads allows a large contact with the coolers 13 and 14 and thus a good cooling efficiency of the metal used for molding during its solidification.
- the inner faces 21 and 22 are flat and not parallel to each other.
- the inner faces 21 and 22 form between them an acute angle a, clearly visible in Figure 2, so that the model 1 1 1 is placed in the tank 10 bears against the inner faces 21 and 22.
- the weight of the model 1 1 allows it to come into contact with the inner faces 21 and 22.
- the two inner faces 21 and 22 are symmetrical with respect to a vertical plane 23.
- the weight of the model 1 1 is divided equally between the two chillers 13 and 14.
- FIGs 3 and 4 show in perspective a part of the tank 10.
- FIG 3 only the walls of the tank 10 formed by the coolers 13 and 14 and the model 1 1 have been shown and in the figure 4, a single wall forming the cooler 14 appears.
- Coolers 13 and 14 are, in the example shown, identical.
- Figures 5 and 6 show in detail examples of inner faces 21 or 22 of the coolers 13 and 14 forming the walls of the tank 10.
- the inner faces are grooved.
- the grooves 24 have flat bottoms.
- the grooves 26 have triangular bottoms 27.
- the grooves 24 and 26 have planar vertices, respectively 28 and 29, extending in the planes of the inner faces 21 and 22 of each of the coolers 13 and 14. The vertices 28 and 29 are intended to come into contact with the model 1 1 .
- the grooves 24 and 26 are oriented vertically in the tank 10 so that the molding sand can flow by gravity into the grooves 24 and 26 when filling the tank 10.
- the sand can reach from areas that would have been inaccessible if the inner faces 21 and 22 had been totally flat.
- the grooves 24 and 26 making it possible, for example, to produce molded parts comprising blind holes that open only on a plane face intended to come into contact with the inner faces 21 and 22.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1055033A FR2961724B1 (fr) | 2010-06-24 | 2010-06-24 | Cuve de moulage en modele perdu |
| PCT/FR2011/051266 WO2011161347A1 (fr) | 2010-06-24 | 2011-06-03 | Cuve de moulage en modele perdu |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2585239A1 true EP2585239A1 (fr) | 2013-05-01 |
| EP2585239B1 EP2585239B1 (fr) | 2018-08-01 |
Family
ID=43736082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11728352.3A Not-in-force EP2585239B1 (fr) | 2010-06-24 | 2011-06-03 | Cuve de moulage en modele perdu |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2585239B1 (fr) |
| FR (1) | FR2961724B1 (fr) |
| WO (1) | WO2011161347A1 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1055033A (fr) | 1952-04-21 | 1954-02-16 | Cie De Pont A Mousson | Nouvelle fonte en particulier pour tambours et autres organes de freinage et piècesobtenues avec cette fonte |
| JPS6028578B2 (ja) * | 1982-05-19 | 1985-07-05 | 日本鋳鍜鋼株式会社 | 鋳鋼鋳造法 |
| JPS5978767A (ja) * | 1982-10-28 | 1984-05-07 | Kubota Ltd | 孔型付圧延ロ−ル用複合スリ−ブの製造法 |
| FR2685229B1 (fr) * | 1991-12-20 | 1995-05-24 | Peugeot | Procede de moulage en modele perdu et element refrigerant pour la mise en óoeuvre de ce procede. |
| FR2935276B1 (fr) * | 2008-08-29 | 2011-11-04 | Peugeot Citroen Automobiles Sa | Procede de moulage a modele perdu et moule pour ce procede |
-
2010
- 2010-06-24 FR FR1055033A patent/FR2961724B1/fr not_active Expired - Fee Related
-
2011
- 2011-06-03 WO PCT/FR2011/051266 patent/WO2011161347A1/fr not_active Ceased
- 2011-06-03 EP EP11728352.3A patent/EP2585239B1/fr not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011161347A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011161347A1 (fr) | 2011-12-29 |
| FR2961724B1 (fr) | 2012-07-13 |
| EP2585239B1 (fr) | 2018-08-01 |
| FR2961724A1 (fr) | 2011-12-30 |
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