EP1380369A1 - Procédé de moulage d'une pièce métallique dans un moule renfermant au moins un noyau de moulage, procédé de réalisation d'un noyau de moulage et noyau de moulage - Google Patents
Procédé de moulage d'une pièce métallique dans un moule renfermant au moins un noyau de moulage, procédé de réalisation d'un noyau de moulage et noyau de moulage Download PDFInfo
- Publication number
- EP1380369A1 EP1380369A1 EP03291651A EP03291651A EP1380369A1 EP 1380369 A1 EP1380369 A1 EP 1380369A1 EP 03291651 A EP03291651 A EP 03291651A EP 03291651 A EP03291651 A EP 03291651A EP 1380369 A1 EP1380369 A1 EP 1380369A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- molding
- mold
- mixture
- eutectic
- 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
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005266 casting Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 150000003839 salts Chemical class 0.000 claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000005496 eutectics Effects 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims description 40
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 32
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
- 239000011780 sodium chloride Substances 0.000 claims description 16
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 3
- 238000005058 metal casting Methods 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 73
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 20
- 239000011347 resin Substances 0.000 description 15
- 229920005989 resin Polymers 0.000 description 15
- 239000004576 sand Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 11
- 230000008018 melting Effects 0.000 description 10
- 238000002844 melting Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000000197 pyrolysis Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000011833 salt mixture Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000009716 squeeze casting Methods 0.000 description 2
- 230000000930 thermomechanical effect Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000374 eutectic mixture Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000009736 wetting Methods 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
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/002—Removing cores by leaching, washing or dissolving
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/105—Salt cores
Definitions
- the invention relates to a method of molding a metal part. in a mold which contains at least one molding core, a method of realization of the core and the molding core obtained by this process.
- Such parts are produced in molds whose internal imprint allows to obtain the external shape of the part and in which places one or more cores to obtain the desired shape of the surface interior of the molded part which may have shaped cavities complex.
- the cores are obtained industrially by injecting, using pressurized air, a mixture of grains of sand coated with a resin, in core boxes having shapes adapted to obtain the core required for molding.
- the resin is then cured by reaction chemical, to ensure mechanical cohesion between the grains of sand of the nucleus.
- the cores comprise, by mass, a mixture of 98% to 99% of silica sand grains to which is added 1% to 2% of organic resin, for example from the chemical family of formophenolic substances.
- the cores contain 45 to 65% grains of sand and the balance, from 55 to 35%, consists of filling air the porosities of the nucleus. This inclusion of air between the grains of sand in porous cores is therefore permeable to pyrolysis gases and alloys which is poured. During casting, the alloy heats up the core and the resin, so that the resin degrades thermally and mechanically and undergoes pyrolysis which generates unwanted gases and residues.
- the nuclei can undergo deformations and ruptures at ambient temperature, during transport, storage or during pouring into a mold.
- the elastic limit at 20 ° C of the sand cores obtained foundry is generally between 0.4 MPa and 0.8 MPa and the stress at rupture of these cores is between 2 MPa and 2.5 MPa. Because of these relatively small values, the size of the nuclei must be smaller 200 mm to reduce the bending they undergo during handling.
- the cores also undergo hot deformation and rupture, during casting, due to the fact that their breaking stress, between 200 ° C and 400 ° C is generally only between 1.5 MPa and 3.5 MPa, the limit corresponding elastic varying from 0.2 MPa to 1.4 MPa. Given these weak mechanical properties, the thickness of the cores must be greater to 8 mm, in order to obtain sufficient rigidity when hot, during casting.
- the gas evolution due to the thermal degradation of the resin produces, inside the part, gas inclusions which are not desired.
- the gas evolution can be bulky, this gas evolution generally being 5 cm 3 / g of the nucleus at 700 ° C.
- the organic type resin generates significant quantities of carbon residues during its pyrolysis.
- the resin emits carbon residues of a greater mass at 15% of the mass of the resin of the cores.
- the core undergoes impregnation by the liquid metal poured into the mold whose overpressure is generally higher at 0.15 bar. This phenomenon is due to the high permeability of the nucleus which is between 120 and 200 Georg Fisher units.
- the roughness of the surface of the molded parts obtained can be strongly marked, because it is highly dependent on the particle size grains of sand. It was thus observed that the measurement of the roughness average (Ra) varies from 150 ⁇ m for a sand with a particle size of 55 AFS, up to a minimum value of 20 ⁇ m for sand with a particle size minimum of 90 AFS.
- the molding according to the known technique can only be used in some case.
- the current manufacturing technique for sand cores linked by the resin cannot be applied either to the manufacture of very fine cores having a thickness less than 8 mm and / or cores having a large length, for example greater than 200 mm. A fortiori, the current technique cannot be used for the production of very thin and long cores, whatever the casting methods used.
- Kernels of the known technique cannot also be used to obtain parts with very smooth skin, the roughness of which is less than 15 ⁇ m.
- nuclei of water-soluble salts for molding metals, especially aluminum we also know, for example from US-4,840,219, nuclei of water-soluble salts for molding metals, especially aluminum ; the composition of the mixture of soluble salts is chosen to obtain a melting point of the nuclei higher than a fixed limit, for example 1225 ° F (or 663 ° C).
- the object of the invention is therefore to propose a molding process of a metal part in a mold containing at least one core of molding in which a liquid metal is poured into the mold containing the au minus a molding core, the part is removed from the mold after cooling and the core of the molded part is eliminated, this process allowing both to improve the quality of the parts obtained, in particular their surface condition, to use molding cores of dimensions which have hitherto not been possible and having improved mechanical characteristics and limiting the air pollution in the molding workshops, the cores being able to be manufactured by a process easy to implement, at a moderate temperature.
- At least one molding core is made of a material consisting of a mixture of at least two water-soluble salts corresponding to an eutectic composition or close to an eutectic, and the core is removed, after molding the part, by dissolving in the water.
- the invention also relates to methods for producing water-soluble salt molding cores and the resulting molding cores.
- the production of foundry cores in soluble salt in water can be carried out by one of the following three techniques: hot sintering, core casting at from a liquid in a steel or refractory mold, injection of a liquid in a steel mold.
- the technique of hot sintering in a steel mold can be used for simple shaped cores. Indeed, the cores produced by sintering must be easily compressible and easily demouldable at hot.
- Injection of the core material into a liquid mold steel can be used for moderately complex shaped cores. This injection technique makes it possible to obtain a very high production rate.
- a material which is particularly satisfactory for producing the nuclei of soluble salts consists of a mixture of two salts, namely sodium chloride NaCl in a proportion of 43% to 47% by mass and carbonate of sodium Na 2 CO 3 , in a proportion of 57% to 53% by mass.
- This mixture of salts made it possible to lower the melting temperature of the mixture with respect to that of the two salts, by constitution of a compound eutectic.
- the melting point of sodium chloride is 805 ° C, that of 850 ° C sodium carbonate while a mixture of sodium chloride and sodium carbonate containing 45% by mass of sodium chloride and 55% by mass of sodium carbonate has a melting point of 636 ° C.
- a eutectic mixture with a significantly lower melting temperature to that of the constituents is 805 ° C, that of 850 ° C sodium carbonate while a mixture of sodium chloride and sodium carbonate containing 45% by mass of sodium chloride and 55% by mass of sodium carbonate has a melting point of 636 ° C.
- the mixture of salts is introduced into the core box, either under liquid form by casting or injection, either in the form of particles which are sintered under a pressure of 50 to 1000 bars and at a lower temperature at the melting point of the eutectic or its constituents, in the core box.
- the cores are extracted from the core box and cooled to room temperature.
- the rheological properties and in particular the flowability of the mixture of soluble salts at 45% by mass of NaCl and 55% by mass of Na 2 CO 3 are very satisfactory when the cores are produced by casting or by injection of the material containing the soluble salts. , in the liquid state in the core box. Indeed, the mixture of salts in the liquid state is very fluid, its viscosity being low, from 0.01 Pa.s to 0.03 Pa.s at 700 ° C which is generally the casting temperature higher than the temperature of eutectic fusion.
- the core material consisting of the mixture of salts to the liquid state is not wetting and therefore does not tend to adhere or cling to the wall of the steel (or silica) mold in which the nuclei.
- the surface tension of the salt mixture at 700 ° C, which is the casting temperature is sufficiently low and between 0.04 and 0.07 N / m.
- the solidification speed is satisfactory in the case of core manufacturing process, the solidification time of the liquid mixture being 0.5 to 2 minutes. This solidification time is sufficient to allow the filling of the core box without it occurring solidification before filling is complete. In addition, this duration allows for sufficiently rapid manufacturing cycles.
- the melting or solidification energies of the mixture are between 330 J / g and 350 J / g.
- thermomechanical properties of cores made up of 45% of sodium chloride and 55% sodium carbonate are quite satisfactory.
- the cores obtained are very resistant mechanically, the breaking stress of the core material being 35 to 40 MPa; this value is about 50 times greater than that obtained in the case of classic cores in resin-bonded sand.
- cores are very compact, their permeability being less than 5 Georg Fisher units, i.e. about 20 times lower than that of a classic sand core.
- the cores obtained are sufficiently refractory, since the melting temperature of the salt mixture is 636 ° C; this temperature is generally sufficient to allow the pouring of metals usually used in the production of parts, for example example for the automotive industry, such as aluminum alloys, magnesium or zinc.
- the cores obtained are moldable directly in a box classic sand-filled cores, because they are very resistant mechanically.
- the cores obtained have a smooth surface, so that during of the molding of a part, they generate only a slight roughness in skin of the piece, this roughness generally being less than 15 ⁇ m.
- the soluble salt cores greatly reduce the defects of inclusion of gases and carbon residues which are present in the parts obtained by molding using conventional cores of sand and resin. Indeed, these soluble salt nuclei do not generate pyrolysis products when hot. In particular, the salt cores do not create gas inclusions by gaseous evolution during casting and carbon residues during casting. The volume of gas released is less than 2 cm 3 / g at 700 ° C and the carbonaceous residues are in a proportion less than 0.1% of the mass of the cores, during a casting at 700 ° C.
- a mold for example a sand mold for casting parts such as cylinder heads or a steel mold.
- metal part liquid inside the mold containing the cores, for example aluminum or an aluminum alloy at a temperature of the order of 700 ° C.
- the part is cooled inside the mold and the mold is removed. of the solidified and cooled part.
- This elimination of the nuclei is carried out by dissolution in water, either room temperature water or hot water, for example at a temperature of 20 to 70 ° C.
- the soluble salt nuclei are brought into contact with water, either by soaking the pieces in a container containing water, either by circulation of water inside the molded part to dissolve the nuclei in soluble salts.
- the soluble salts constituting the nuclei have good solubility in water, this solubility being 35 to 45 g / l in cold water or in hot water.
- the brine obtained by dissolving the salts in water is not toxic because the salts are not themselves toxic.
- the recycling of the salts extracted from the brine is an operation which can be easily carried out, for example by boiling or evaporation of the water.
- the kernel removal operation is carried out without causing air pollution in mold shops with volatile organic compounds, as in the case of sand and resin cores which are eliminated by heat treatment.
- the salt nuclei used in the context of the invention are sufficiently resistant to be used in foundry processes using pressure injection of alloys into the casting mold, in processes thixomoulding, die casting, "squeeze casting", and other molding processes using an injection of a metal such as aluminum, magnesium, zinc or other metals and alloys in a mold.
- the cores according to the invention can also be produced under the shape of thin and long cores usable in casting processes by gravity.
- the cores can be produced in the form of very ends less than 8 mm thick, long cores of greater length 200 mm or very fine and long cores.
- cores used in the implementation of the invention can allow make cavities with a small dimension such as passages inter-cylinder water in V6 engines or recesses between the valves, in cylinder heads of HDI type engines.
- the mixture of soluble salts for the constitution of the nuclei can contain more than two salts; in this case too, at least two of the salts can be in proportions forming a eutectic composition.
- the invention can also be used in different fields of the production of parts for motor vehicle engine.
- the invention can have applications in many fields industry, for the production of parts by molding in a mold containing at least one molding core.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Mold Materials And Core Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims (13)
- Procédé de moulage d'une pièce métallique dans un moule renfermant au moins un noyau de moulage, dans lequel on coule du métal liquide dans le moule renfermant l'au moins un noyau de moulage, on démoule la pièce après refroidissement et on élimine le noyau de la pièce moulée, caractérisé par le fait qu'on réalise l'au moins un noyau de moulage en un matériau constitué par un mélange d'au moins deux sels solubles dans l'eau correspondant à une composition eutectique ou proche d'un eutectique, et qu'on élimine le noyau, après moulage de la pièce, par dissolution dans de l'eau.
- Procédé suivant la revendication 1, caractérisé par le fait qu'on réaliser le noyau de moulage en un matériau renfermant en masse de 43 % à 47 % de chlorure de sodium NaCI et de 57 % à 53 % de carbonate de sodium Na2CO3.
- Procédé suivant la revendication 2, caractérisé par le fait que le mélange de chlorure de sodium et de carbonate de sodium renferme, en masse, environ 45 % de chlorure de sodium et 55 % de carbonate de sodium.
- Procédé suivant l'une quelconque des revendications 2 et 3, caractérisé par le fait qu'on réalise la coulée du métal liquide dans le moule à une température de l'ordre de 700°C.
- Procédé suivant l'une quelconque des revendications 1 à 4, caractérisé par le fait qu'on réalise l'au moins un noyau de moulage par l'un des procédés suivants : coulée ou injection dans un moule du matériau renfermant les au moins deux sels solubles à l'état fondu, frittage de particules du matériau renfermant au moins un sel soluble dans l'eau, dans un moule constituant une boíte à noyaux.
- Procédé de réalisation d'un noyau de moulage, caractérisé par le fait qu'on introduit dans un moule de moulage du noyau, constituant une boíte à noyaux, un matériau renfermant un mélange d'au moins deux sels solubles dans l'eau, correspondant à une composition eutectique ou proche d'un eutectique, sous forme fondue, et qu'on réalise, par moulage, le noyau à l'intérieur du moule.
- Procédé de réalisation d'un noyau de moulage, caractérisé par le fait qu'on introduit au moins un matériau renfermant un mélange d'au moins deux sels solubles, correspondant à une composition eutectique ou proche d'un eutectique, dans un moule de moulage du noyau, constituant une boíte à noyaux, sous forme de particules, et qu'on fritte à l'intérieur du moule de la boíte à noyaux le matériau sous forme particulaire, pour former le noyau à l'intérieur du moule de la boíte à noyaux.
- Procédé suivant l'une quelconque des revendications 6 et 7, caractérisé par le fait que le mélange d'au moins deux sels solubles dans l'eau renferme de 43 % à 47 % en masse de chlorure de sodium NaCI et de 57 % à 53 %, en masse, de carbonate de sodium Na2CO3.
- Noyau de moulage pour le moulage d'une pièce métallique dans un moule, caractérisé par le fait qu'il est constitué d'un matériau renfermant un mélange d'au moins deux sels solubles dans l'eau, correspondant à une composition eutectique ou proche d'un eutectique, .
- Noyau suivant la revendication 9, caractérisé par le fait qu'il est constitué d'un mélange de 43 % à 47 % en masse de chlorure de sodium NaCI et de 57 % à 53 %, en masse, de carbonate de sodium Na2CO3.
- Noyau suivant l'une quelconque des revendications 9 et 10, caractérisé par le fait qu'il présente une contrainte à la rupture comprise entre 35 et 40 MPa, une perméabilité inférieure à 5 unités Georg Fisher et un écrasement à la rupture compris entre 2 et 3 %.
- Noyau suivant l'une quelconque des revendications 9 à 11, caractérisé par le fait qu'il présente une épaisseur inférieure à 8 mm et/ou une longueur supérieure à 200 mm.
- Noyau suivant l'une quelconque des revendications 9 à 12, pour la réalisation de cavités, dans des culasses de moteur de véhicule automobile réalisées par moulage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0208691 | 2002-07-10 | ||
| FR0208691A FR2842129B1 (fr) | 2002-07-10 | 2002-07-10 | Procede de moulage d'une piece metallique dans un moule renfermant au moins un noyau de moulage, procede de realisation d'un noyau de moulage et noyau de moulage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1380369A1 true EP1380369A1 (fr) | 2004-01-14 |
| EP1380369B1 EP1380369B1 (fr) | 2010-09-15 |
Family
ID=29725306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03291651A Expired - Lifetime EP1380369B1 (fr) | 2002-07-10 | 2003-07-03 | Procédé de moulage d'une pièce métallique dans un moule renfermant au moins un noyau de moulage, procédé de réalisation d'un noyau de moulage et noyau de moulage |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1380369B1 (fr) |
| AT (1) | ATE481192T1 (fr) |
| DE (1) | DE60334179D1 (fr) |
| FR (1) | FR2842129B1 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006010449A3 (fr) * | 2004-07-23 | 2006-08-03 | Ceramtec Ag | Noyaux de fonderie en ceramique |
| WO2007036563A1 (fr) * | 2005-09-30 | 2007-04-05 | Ceramtec Ag Innovative Ceramic Engineering | Noyaux et procede de production de noyaux |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2077555A1 (en) * | 1969-12-16 | 1971-10-29 | Sumitomo Chemical Co | Magnesium chloride-based water-soluble - removable casting cores |
| US4840219A (en) * | 1988-03-28 | 1989-06-20 | Foreman Robert W | Mixture and method for preparing casting cores and cores prepared thereby |
| JPH02121748A (ja) * | 1988-10-31 | 1990-05-09 | Aisin Seiki Co Ltd | 可溶性中子の溶出確認方法 |
-
2002
- 2002-07-10 FR FR0208691A patent/FR2842129B1/fr not_active Expired - Fee Related
-
2003
- 2003-07-03 EP EP03291651A patent/EP1380369B1/fr not_active Expired - Lifetime
- 2003-07-03 DE DE60334179T patent/DE60334179D1/de not_active Expired - Lifetime
- 2003-07-03 AT AT03291651T patent/ATE481192T1/de not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2077555A1 (en) * | 1969-12-16 | 1971-10-29 | Sumitomo Chemical Co | Magnesium chloride-based water-soluble - removable casting cores |
| US4840219A (en) * | 1988-03-28 | 1989-06-20 | Foreman Robert W | Mixture and method for preparing casting cores and cores prepared thereby |
| JPH02121748A (ja) * | 1988-10-31 | 1990-05-09 | Aisin Seiki Co Ltd | 可溶性中子の溶出確認方法 |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 014, no. 351 (M - 1003) 30 July 1990 (1990-07-30) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006010449A3 (fr) * | 2004-07-23 | 2006-08-03 | Ceramtec Ag | Noyaux de fonderie en ceramique |
| WO2007036563A1 (fr) * | 2005-09-30 | 2007-04-05 | Ceramtec Ag Innovative Ceramic Engineering | Noyaux et procede de production de noyaux |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2842129A1 (fr) | 2004-01-16 |
| DE60334179D1 (de) | 2010-10-28 |
| EP1380369B1 (fr) | 2010-09-15 |
| ATE481192T1 (de) | 2010-10-15 |
| FR2842129B1 (fr) | 2005-04-08 |
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