EP1929069A2 - Formtrennschicht für das giessen von nichteisenmetallen - Google Patents
Formtrennschicht für das giessen von nichteisenmetallenInfo
- Publication number
- EP1929069A2 EP1929069A2 EP06805662A EP06805662A EP1929069A2 EP 1929069 A2 EP1929069 A2 EP 1929069A2 EP 06805662 A EP06805662 A EP 06805662A EP 06805662 A EP06805662 A EP 06805662A EP 1929069 A2 EP1929069 A2 EP 1929069A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- release agent
- phosphate
- permanent mold
- layer
- parts
- 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.)
- Ceased
Links
- 238000005266 casting Methods 0.000 title claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 title abstract description 10
- 239000002184 metal Substances 0.000 title abstract description 10
- 150000002739 metals Chemical class 0.000 title description 2
- 239000000463 material Substances 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 230000009969 flowable effect Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 3
- 239000010959 steel Substances 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 48
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 11
- 229910019142 PO4 Inorganic materials 0.000 claims description 11
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- 239000002585 base Substances 0.000 claims description 11
- 229910052582 BN Inorganic materials 0.000 claims description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 9
- 229920000159 gelatin Polymers 0.000 claims description 9
- 235000019322 gelatine Nutrition 0.000 claims description 9
- LXXDUCAGSSICDI-UHFFFAOYSA-N iron(3+);phosphite Chemical compound [Fe+3].[O-]P([O-])[O-] LXXDUCAGSSICDI-UHFFFAOYSA-N 0.000 claims description 9
- 239000010452 phosphate Substances 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- 108010010803 Gelatin Proteins 0.000 claims description 8
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000008273 gelatin Substances 0.000 claims description 8
- 235000011852 gelatine desserts Nutrition 0.000 claims description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 7
- YZYDPPZYDIRSJT-UHFFFAOYSA-K boron phosphate Chemical compound [B+3].[O-]P([O-])([O-])=O YZYDPPZYDIRSJT-UHFFFAOYSA-K 0.000 claims description 7
- MHJAJDCZWVHCPF-UHFFFAOYSA-L dimagnesium phosphate Chemical compound [Mg+2].OP([O-])([O-])=O MHJAJDCZWVHCPF-UHFFFAOYSA-L 0.000 claims description 7
- 239000004137 magnesium phosphate Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229910000401 monomagnesium phosphate Inorganic materials 0.000 claims description 7
- 235000019785 monomagnesium phosphate Nutrition 0.000 claims description 7
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- 229910000149 boron phosphate Inorganic materials 0.000 claims description 6
- 239000001488 sodium phosphate Substances 0.000 claims description 6
- 238000004512 die casting Methods 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- LKCUKVWRIAZXDU-UHFFFAOYSA-L zinc;hydron;phosphate Chemical compound [Zn+2].OP([O-])([O-])=O LKCUKVWRIAZXDU-UHFFFAOYSA-L 0.000 claims description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 3
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 3
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 3
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 3
- 235000011008 sodium phosphates Nutrition 0.000 claims description 3
- 238000009716 squeeze casting Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 2
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 2
- 239000006082 mold release agent Substances 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 58
- 235000021317 phosphate Nutrition 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- -1 ferrous metals Chemical class 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- QGQFOJGMPGJJGG-UHFFFAOYSA-K [B+3].[O-]N=O.[O-]N=O.[O-]N=O Chemical compound [B+3].[O-]N=O.[O-]N=O.[O-]N=O QGQFOJGMPGJJGG-UHFFFAOYSA-K 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000001828 Gelatine Substances 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- BECVLEVEVXAFSH-UHFFFAOYSA-K manganese(3+);phosphate Chemical compound [Mn+3].[O-]P([O-])([O-])=O BECVLEVEVXAFSH-UHFFFAOYSA-K 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 239000003238 silicate melt Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010117 thixocasting Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000002347 wear-protection layer Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2007—Methods or apparatus for cleaning or lubricating moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2209—Selection of die materials
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/18—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- the invention relates to a metallic, iron-containing permanent mold with a coating which can be acted upon by a liquid or a flowable aluminum material. Moreover, the invention relates to a release agent for producing such a layer, and to a method for producing such a layer on a surface of a permanent mold.
- release agents for trouble-free operation.
- the release agent must serve to assist the metal flow, resulting in a uniform filling of the permanent mold and at the same time the release agent is used to improve the final formability of the cast parts.
- the release agent serves to avoid residues on the permanent mold, which can lead to inaccuracies in the mold.
- the release agent During the pouring of the material into the permanent mold, no excessive gas formation may occur during the decomposition of the release agent, which would lead to a porosity of the molded parts.
- the release agent must ultimately contain no dangerous or toxic substances. Depending on the fulfillment of these requirements, the quality of the release agent is measured.
- boron nitride A long known and used in release agents material is boron nitride (BN), which is similar in structure to its crystal structure as graphite. Like graphite, it has a low wettability compared to many substances, such as silicate melts or molten metals. Therefore, there are many studies on non-adherent layers based on boron nitride in order to use them for casting processes. The problem with this usage, however, is that it can not manage boron nitride in Substance on forms, in particular of complex nature, to apply permanently. A method for the permanent application of a temperature-stable, corrosion-resistant mold release layer is described in DE 198 42 660 A1. In this case, a boron nitrite powder is applied to the surface of a permanent mold by means of electrostatic coating.
- DE 101 24 434 A1 discloses a wear protection layer in which functional materials are incorporated in a binder matrix.
- This so-called functional coating consists of an inorganic matrix phase, which consists at least largely of a phosphate, and a functional material embedded therein, for example, a metal, graphite, a hard material, a dry lubricant, an aluminum oxide, a silicon carbide, ect. can be.
- a liquid component which may be, for example, water, a functional material in powder form and is added to produce a phosphate with phosphoric acid.
- Such a composite matrix solution with the liquid component and the phosphate may also be referred to as gel due to their consistency.
- the material After coating a material with this matrix solution, the material undergoes a heat treatment, so that a firmly adhering functional coating is formed on the base material.
- the object of the present invention is to develop a long-term stable layer on a metallic, iron-containing permanent mold, which forms a chemical bond with the base material of Treasureform and thus meets the requirements of a release agent or even goes beyond these requirements.
- Another object of the invention is to provide a method capable of producing such a layer and easily curable by the damage to the layer.
- the object according to the invention with respect to a coating of a permanent mold is achieved in that on at least one surface of the permanent mold a layer consisting of
- a polymer comprising polymerized monoaluminum phosphate and / or monozinc phosphate and / or monomagnesium phosphate and / or sodium phosphate and / or boron phosphate, which at least partially surrounds the iron phosphite, the structural parts and the primary parts, is present.
- the layer additionally contains:
- the requirements for a release agent in the form of a long-term stable layer are particularly well met.
- the metal flow is supported to the effect that the oxide skin of the aluminum material is broken up by the structural parts protruding from the layer and the liquid aluminum material can easily be distributed in the permanent form below the oxide layer.
- the layer thus offers optimum conditions for filling the permanent mold.
- the sliding parts of the form boron nitride (BN) serve as a sliding plane for the liquid or flowable aluminum and thus support the metal flow, they also serve at the same time to improve the final formability of the cast components.
- a firmly adhering layer is formed, the solid composite being formed by the chemical bonding of the phosphates to the iron of the Base material of the permanent form is produced, preferably phosphates are used.
- This type of firm bonding of the layer with the base material of the permanent form prevents residues from adhering to the permanent mold, which could lead to dimensional inaccuracies.
- Another advantage of the layer according to the invention is that the layer is excited at elevated temperatures to an increased polymerization. As a result, longer polymers form, on the one hand increase the adhesion and cohesion and on the other hand increase the elasticity of the layer.
- the long-term stable and firmly adhering layer is therefore extremely elastic at higher temperatures, as occur during filling of the permanent mold, and can follow the changes in shape of the permanent mold elastically and thus advantageously without damage to the layer.
- the object according to the invention is achieved in that the release agent is formed from a completely desalted water and contains the following constituents:
- an organic and / or inorganic dispersant preferably gelatin.
- the release agent additionally contains:
- the release agent according to the invention offers the advantage that it can be produced cost-effectively on the basis of demineralized water and, on the other hand, is easy to apply to the tool due to its viscosity.
- the release agent can be sprayed onto the permanent mold.
- the release agent meets the requirements for a release agent in that no toxic substances are included, which can be disposed of only at high cost.
- the object according to the invention with regard to the method for producing a layer is achieved in that the surface is first subjected to the release agent according to one of claims 5 to 14, and that subsequently the permanent mold is heated to a temperature of at least 200 ° C.
- the phosphate chemically binds with the iron of the base material and the monoaluminum phosphates and / or monozinc phosphates and / or monomagnesium phosphate and / or mono-manganese phosphate and / or boron phosphate form polymers which form a firmly adhering layer on the surface of the permanent mold form.
- the advantage here is that the release agent, which consists of a completely desalinated water, at this temperature is already completely evaporated from the layer and thus there is no or very little gas formation when filling the permanent mold.
- the polymerization is supported in increasing the temperature, so that as described above, another advantageous effect of the layer is generated.
- the use of gelatin is particularly advantageous, since this nanoparticles are formed independently.
- Gelantine preferably has the task of making a coordinated contribution to balancing the potential for dispersing and accelerating the reaction.
- the gelatin in the binder phase reference is hereby made to the Richardson-Ellingham diagram, which is known on the one hand and on the other hand
- Magnesium and calcium as main constituents of the gelatin serve to stabilize the structural parts and primary parts during the dissolution of the hot base material through the coating, so that a control of the bonding of the coating to the green is possible.
- the gelatin is present in proportions of 0.5 wt .-% to 5 wt .-% in the release agent and is thus detectable at least in trace amounts in the coating of the functional component. Should the layer also be damaged, then the layer can be healed very easily, since defects in the layer are healed immediately after renewed application of the permanent mold with the release agent. Here, new iron phosphite is formed and the temperature of the permanent polymerizes the phosphate, so that the layer completely heals.
- a layer is formed which has a thickness of about 1 to 80 .mu.m, layer thicknesses between 30 and 50 .mu.m are preferred Deployment case is dependent.
- the layer thickness depends on the application, that is, on the casting process, with the thinnest layers being used for die casting and the thickest layers being used for low pressure.
- the thinnest layers are applied, since here a good heat transfer to the permanent mold is deliberately set in order to allow rapid solidification of the casting.
- squeeze-casting process an average thickness is set, since in this case the casting mold is slowly filled and then subjected to a high pressure.
- the existing on the surface of the permanent mold layer is chemically connected by means of iron phosphite with the base material.
- the iron phosphite thus acts as an adhesive between the layer and the base material.
- the structural parts of the form of Al 2 O 3 and / or SiO 2 and / or TiO 2 and / or ZrO 2 having a size of about 80 nm to 200 nm, and interlock with each other and form a layer on the base material.
- the term structural parts is selected specifically, since particles are preferably used which are not smooth but have a structured surface.
- the much larger sliding parts of the boron nitrite lie between the structural parts in the layer and are held by the composite of structural parts with polymers.
- the layer thus constructed Due to its fractile structure, the layer thus constructed has already lost its inherent However, the essential bond between the iron phosphite and the structural parts, the primary parts and the sliding parts is provided by the polymerized phosphate, which is formed from the polymerized monoaluminum phosphate and / or Monozinkphosphat and / or monomagnesium phosphate and / or sodium phosphate and / or boron phosphate.
- the chains of the polymers provide the cohesion between the chemically bonded iron phosphite, the structural parts, the primary parts and the sliding parts. The more strongly the permanent mold is heated and thus likewise the layer, the longer the polymer chains become, so that with increasing temperature the elasticity of the layer increases.
- the polymers employed in this invention Sieren polymerized at about 200 0 C and have a glass transition temperature of about 830 0 C.
- the liquid aluminum has a temperature of about 730 ° C and thus does not reach the glass transition temperature of the polymers. It is thus an extremely stable, created for the casting of aluminum materials very suitable system as a layer structure.
- the iron phosphites serve as an adhesive to the base material of the permanent mold and the primary parts are advantageously used to close the gaps between the structural parts, thus producing a very smooth surface. An adhesion of the liquid casting material is thus almost almost impossible.
- the structural parts are in a size of 80nm to 200nm and stand as edges out of the layer.
- the structurally highly structured structural parts tear cracks in the oxide layer of the liquid aluminum and grind the oxide skin, so that the oxide skin is crushed into minute parts and thus not present as lattice defects in the structural structure of the casting.
- An advantage of the structural parts used according to the invention is thus that the oxide skin is destroyed and comminuted.
- the sliding parts which are in the form of boron nitride, are much larger in size than the primary and structural parts.
- the structural parts form the structural parts with a weight percentage of up to 10% in the liquid release agent, the largest part of the layer.
- the primary parts serve as fillers for the interstices and thus serve to smooth the layer.
- the sliding parts present in a proportion by weight of up to 5%, are finely distributed in the structural parts and also occur on the surface of the layer. Due to the number of sliding parts, these do not form the largest surface of the layer but are very finely distributed, so that they are used as a lubricant for casting but primarily for demolding the permanent mold and for removal serve the casting.
- the removal from the mold is advantageously facilitated by the use of the layer according to the invention, since, on the one hand, a very smooth surface is present on the layer through the structural parts and the smoothing primary parts and, at the same time, a lubricant is provided by the sliding parts.
- the experiments have shown that by the addition of an acid buffer of the form of sodium hydroxide and / or potassium hydroxide and / or aluminum chloride and the adjustment of a pH of 4 to 5, an optimal formation of the layer is produced.
- the acid buffer thus serves to delay the reaction and to ensure a uniform course of the reaction.
- the cold permanent form is applied to the release agent in which the release agent is sprayed and the permanent mold is heated.
- the mono aluminum phosphates and / or mono zinc phosphate and / or mono magnesium phosphate and / or sodium phosphate and / or boron phosphate polymerize and there is a formation of a long-term stable layer on the surface of the permanent mold.
- a common temperature for preheating during die casting is a temperature between 220 0 C and 28O 0 C, so that here an optimum temperature for the polymerization of the release agent is present.
- the preheating temperatures are about 300 0 C, so that a formation of a layer is also ensured here.
- the liquid metal with a temperature of about 720 0 C to 730 0 C when casting aluminum is below the glass transition temperature. But the Thixocasting is above 200 ° C and thus the use of the layer according to the invention in this method is also conceivable.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mold Materials And Core Materials (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005042475A DE102005042475A1 (de) | 2005-09-07 | 2005-09-07 | Formtrennschicht für das Gießen von Nichteisenmetallen |
| PCT/EP2006/008735 WO2007028615A2 (de) | 2005-09-07 | 2006-09-07 | Formtrennschicht für das giessen von nichteisenmetallen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1929069A2 true EP1929069A2 (de) | 2008-06-11 |
Family
ID=37721408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06805662A Ceased EP1929069A2 (de) | 2005-09-07 | 2006-09-07 | Formtrennschicht für das giessen von nichteisenmetallen |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8205659B2 (de) |
| EP (1) | EP1929069A2 (de) |
| KR (1) | KR100942210B1 (de) |
| CN (1) | CN101326307B (de) |
| DE (1) | DE102005042475A1 (de) |
| WO (1) | WO2007028615A2 (de) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005042474A1 (de) * | 2005-09-07 | 2007-03-08 | Ks Aluminium-Technologie Ag | Beschichtung eines thermisch und erosiv belasteten Funktionsbauteil, sowie ein Trennmittel und ein Verfahren zur Herstellung der Beschichtung |
| WO2009007093A2 (de) * | 2007-07-11 | 2009-01-15 | Ks Aluminium-Technologie Gmbh | Schlichtesystem zum schutz von giesswerkzeugen |
| DE102008006147A1 (de) | 2008-01-26 | 2009-09-10 | Gelita Ag | Reinigungssystem für metallische und keramische Oberflächen |
| DE102009033158A1 (de) * | 2009-07-13 | 2011-01-27 | Gelita Ag | Konzentrat zur Herstellung eines Kühl- und Trennmittels sowie derartiges Kühl- und Trennmittel |
| CN102118757B (zh) | 2009-12-31 | 2013-11-06 | 中兴通讯股份有限公司 | 一种无线中继装置及其与基站和终端通信的方法 |
| US8932518B2 (en) | 2012-02-29 | 2015-01-13 | General Electric Company | Mold and facecoat compositions |
| CN103706756B (zh) * | 2012-09-29 | 2016-12-07 | 天能电池(芜湖)有限公司 | 铅酸蓄电池浇铸板栅用喷模剂及其制备方法 |
| DE102013102301A1 (de) * | 2013-03-08 | 2014-09-11 | Chemische Fabrik Budenheim Kg | Beschichtungssystem auf Basis einer Kombination von Monoaluminiumphosphat mit Magnesiumoxid |
| US9511417B2 (en) | 2013-11-26 | 2016-12-06 | General Electric Company | Silicon carbide-containing mold and facecoat compositions and methods for casting titanium and titanium aluminide alloys |
| US9192983B2 (en) | 2013-11-26 | 2015-11-24 | General Electric Company | Silicon carbide-containing mold and facecoat compositions and methods for casting titanium and titanium aluminide alloys |
| CN105127364B (zh) * | 2015-08-25 | 2018-10-09 | 苏州热工研究院有限公司 | 离心铸造铸件的脱模涂料及其涂刷方法 |
| CN115007796B (zh) * | 2022-05-30 | 2024-07-02 | 中信戴卡股份有限公司 | 一种铸造铝合金用升液管涂料及其使用方法 |
| PL248059B1 (pl) * | 2022-12-30 | 2025-10-13 | Prec Odlew Spolka Z Ograniczona Odpowiedzialnoscia | Powłoka do odlewów ciężkich, zwłaszcza z żeliwa i staliwa i sposób wytwarzania powłok do odlewów ciężkich, zwłaszcza z żeliwa i staliwa |
| CN116199510B (zh) * | 2023-01-03 | 2024-03-15 | 三祥新材股份有限公司 | 一种电熔氧化锆生产过程中模具脱模方法 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3727666A (en) * | 1971-08-16 | 1973-04-17 | Howmet Corp | Method of casting using a mold having a refractory coating thereon |
| CH596326A5 (en) * | 1975-09-22 | 1978-03-15 | Fischer Ag Georg | Protective surfacing of permanent metal casting moulds |
| JPS5831258B2 (ja) * | 1979-05-10 | 1983-07-05 | 株式会社 中央発明研究所 | 金型鋳造用耐久性塗型材 |
| US4454050A (en) * | 1983-03-21 | 1984-06-12 | Pennwalt Corporation | Aqueous release agent and lubricant |
| GB9517721D0 (en) * | 1995-08-31 | 1995-11-01 | Univ Sheffield | Protective barriers in ceramic dies |
| US6139619A (en) * | 1996-02-29 | 2000-10-31 | Borden Chemical, Inc. | Binders for cores and molds |
| FR2755384B1 (fr) * | 1996-11-06 | 1998-11-27 | Usinor Sacilor | Enduit protecteur pour elements en materiau refractaire d'une lingotiere de coulee continue des metaux, et elements en materiau refractaire protege a l'aide de cet enduit |
| DE19842660A1 (de) | 1998-09-17 | 2000-03-30 | Kempten Elektroschmelz Gmbh | Verfahren zur Beschichtung einer Oberfläche mit einem Trennmittel |
| DE10124434A1 (de) * | 2001-05-18 | 2002-11-28 | Bosch Gmbh Robert | Funktionsbeschichtung und Verfahren zu deren Erzeugung, insbesondere zum Verschleißschutz, Korrosionsschutz oder zur Temperaturisolation |
| DE10326769B3 (de) * | 2003-06-13 | 2004-11-11 | Esk Ceramics Gmbh & Co. Kg | Dauerhafte BN-Formtrennschichten für das Druckgießen von Nichteisenmetallen |
| DE10326815A1 (de) * | 2003-06-13 | 2004-12-30 | Institut für Neue Materialien Gemeinnützige GmbH | Antiadhäsive Hochtemperaturschichten |
| DE50308118D1 (de) * | 2003-06-13 | 2007-10-18 | Esk Ceramics Gmbh & Co Kg | Dauerhafte Bornitrid-Formtrennschichten für das Druckgiessen von Nichteisenmetallen |
| DE102005042474A1 (de) * | 2005-09-07 | 2007-03-08 | Ks Aluminium-Technologie Ag | Beschichtung eines thermisch und erosiv belasteten Funktionsbauteil, sowie ein Trennmittel und ein Verfahren zur Herstellung der Beschichtung |
-
2005
- 2005-09-07 DE DE102005042475A patent/DE102005042475A1/de not_active Ceased
-
2006
- 2006-09-07 EP EP06805662A patent/EP1929069A2/de not_active Ceased
- 2006-09-07 US US12/089,430 patent/US8205659B2/en not_active Expired - Fee Related
- 2006-09-07 KR KR1020087009171A patent/KR100942210B1/ko not_active Expired - Fee Related
- 2006-09-07 WO PCT/EP2006/008735 patent/WO2007028615A2/de not_active Ceased
- 2006-09-07 CN CN2006800413667A patent/CN101326307B/zh not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007028615A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100942210B1 (ko) | 2010-02-11 |
| KR20080095835A (ko) | 2008-10-29 |
| US20100237224A1 (en) | 2010-09-23 |
| DE102005042475A1 (de) | 2007-03-08 |
| WO2007028615A2 (de) | 2007-03-15 |
| CN101326307B (zh) | 2011-01-19 |
| CN101326307A (zh) | 2008-12-17 |
| US8205659B2 (en) | 2012-06-26 |
| WO2007028615A3 (de) | 2007-04-26 |
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