EP0058180A1 - Method for quenching sand hollow forms and cast metallic pieces, application of that method and apparatus for carrying out that method. - Google Patents
Method for quenching sand hollow forms and cast metallic pieces, application of that method and apparatus for carrying out that method.Info
- Publication number
- EP0058180A1 EP0058180A1 EP81902308A EP81902308A EP0058180A1 EP 0058180 A1 EP0058180 A1 EP 0058180A1 EP 81902308 A EP81902308 A EP 81902308A EP 81902308 A EP81902308 A EP 81902308A EP 0058180 A1 EP0058180 A1 EP 0058180A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- sand
- quenching
- sand molds
- medium
- 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 27
- 230000000171 quenching effect Effects 0.000 title claims abstract description 14
- 238000010791 quenching Methods 0.000 title claims abstract description 13
- 239000004576 sand Substances 0.000 title claims description 21
- 238000005266 casting Methods 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 229920001568 phenolic resin Polymers 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000005011 phenolic resin Substances 0.000 claims description 4
- 239000005871 repellent Substances 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 238000005429 filling process Methods 0.000 claims 2
- 239000000155 melt Substances 0.000 claims 2
- 229910001141 Ductile iron Inorganic materials 0.000 claims 1
- 229910001060 Gray iron Inorganic materials 0.000 claims 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 229910001338 liquidmetal Inorganic materials 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 239000011368 organic material Substances 0.000 abstract 1
- 238000007528 sand casting Methods 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 238000001816 cooling Methods 0.000 description 5
- 238000004512 die casting Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 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
- 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 casting process for metals using shell-shaped sand molds consolidated by a chemical reaction, the application of this process to molten iron, and a casting device suitable for carrying out the process.
- the invention seeks to remedy this.
- the invention as characterized in the claims, solves the problem in the solidifying metal form quickly to develop a stable edge shell and to produce a fine-grained structure, in particular in the case of graphitically solidifying iron, the additional volume resulting from the graphite precipitation should be used in an inward-facing manner to compensate for the solidification volume deficit.
- the impregnation of the outer surfaces of the sand shells with a water-repellent substance for example silicone, which means that the shells filled with the metal, e.g. with water or water vapor, can be quenched without quenching liquid can penetrate through the sand bowls (masks) to the iron.
- a water-repellent substance for example silicone
- the quenching of the castings according to the invention also brings about a significant improvement in the mechanical properties.
- the method according to the invention offers cost advantages over die casting since the expensive die casting molds are eliminated.
- the good, die-cast-like, mechanical properties of the castings produced by the process according to the invention are due to the fact that, on the one hand, a rapid-release heat dissipation produces a fine-grained structure, and on the other hand, after cooling, the mixed crystal enriched with alloy additives, depending on the cooling rate, is similar to the die-casting process partly remains in the supersaturated state and thus has a certain hardening ability.
- the masks can be made according to the prior art, e.g. by adding a binder to the sand that hardens.
- a binder e.g., a binder that hardens.
- One such process is the croning process, in which the sand is bound by phenolic resins.
- the wall thickness of the shells is preferably at least 3 mm.
- the shell-shaped molded parts are completed as usual to form the mold, with the impregnation For example, with silicone before assembling, but preferably only after assembling to avoid untreated areas on the contact surface of the shells.
- the sand masks can be sprayed with quenching liquid or vapor or can be completely immersed in a quenching bath.
- Water or water vapor is preferably used as a deterrent.
- the time of adding water depends on the cast metal and the wall thickness of the casting.
- aluminum or very thin-walled cast iron e.g. Connecting rods can have the mold washed with water during casting.
- thick-walled parts e.g. Crankshafts are watered a few seconds after the casting.
- Steel gravel, quartz gravel or quartz sand, as well as other granular masses or solid supports are particularly suitable as support means.
- the quenching liquid itself can also be used as a proppant in a closed container.
- the coolant is removed at a mask temperature of 600 - 700o, the masks glow more or less and disintegrate when unpacking.
- the The mask is removed in a water bath or while spraying with a spray, which has the following advantages:
- a phenol formaldehyde binder develops 20 - 25% methane and 25 - 30% carbon monoxide when heated to casting temperature, which has considerable dangers for humans.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Dans ce procede les formes de moulage en sable sont rendues imperme a l'eau. Le trempage est obtenu a partir de l'exterieur au moyen d'un fluide convenable, apres que les formes de moulage aient ete remplies de metal ou pendant l'operation de remplissage. De facon avantageuse, les formes de moulage liees par des matieres organiques sont amenees a une temperature de trempage ne produisant pas une decomposition gazeuse du liant organique.In this process the sand casting forms are made waterproof. Quenching is achieved from the outside by means of a suitable fluid, after the casting forms have been filled with metal or during the filling operation. Advantageously, the molding forms bound by organic materials are brought to a soaking temperature which does not produce gaseous decomposition of the organic binder.
Description
Giessverfahren für Metalle unter Verwendung von schalen förmigen Sandformen Casting process for metals using shell-shaped sand molds
Die Erfindung bezieht sich auf ein Giessverfahren für Metalle unter Verwendung von schalenförmigen, durch eine chemische Reaktion verfestigte Sandformen, die Anwendung dieses Verfahrens auf Eisenschmelzen, sowie eine zur Durchführung des Verfahrens geeignete Giesseinrichtung.The invention relates to a casting process for metals using shell-shaped sand molds consolidated by a chemical reaction, the application of this process to molten iron, and a casting device suitable for carrying out the process.
Es sind eine grosse .Anzahl von solchen Giessverfahren bekannt, denen aber eine ganze Reihe von verfahrenstechnischen und metallurgischen Nachteilen anhaftet.A large number of such casting processes are known, but they have a number of procedural and metallurgical disadvantages.
Ferner sind Verfahren zur Kühlung von dauerhaften Metallformen mittels Kühlkanälen in den Formen bekannt, wie beispielsweise die CH-PS 557 209 zeigt. Eine derartige Kühlmethode ist allerdings nicht auf Sandformen anwendbar.Furthermore, methods for cooling permanent metal molds by means of cooling channels in the molds are known, such as CH-PS 557 209 shows. However, such a cooling method is not applicable to sand molds.
Hier will die Erfindung Abhilfe schaffen. Die Erfindung, wie Sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, in der erstarrenden Metallform schnell eine
tragfähige Randschale auszubilden und ein feinkörniges Gefüge zu erzeugen, insbesondere soll bei graphitisch erstarrendenem Eisen, das durch die Gräphitausscheidung entstehende Mehrvolumen in nach Innen gerichteter Weise zum Ausgleich des Erstarrungsvolumendefizites verwendet werden.The invention seeks to remedy this. The invention, as characterized in the claims, solves the problem in the solidifying metal form quickly to develop a stable edge shell and to produce a fine-grained structure, in particular in the case of graphitically solidifying iron, the additional volume resulting from the graphite precipitation should be used in an inward-facing manner to compensate for the solidification volume deficit.
Von besonderer, erfindungswesentlicher Bedeutung ist dabei die Imprägnierung der Aussenflachen der Sandschalen mit einer wasserabstossenden Substanz, beispielsweise Silikon, wodurch bereits während des Füllvorganges oder kurz danach die mit dem Metall gefüllten Schalen von aussen, z.B. mit Wasser oder Wasserdampf, abgeschreckt werden können, ohne dass Äbschreckflüssigkeit durch die Sandschalen (Masken) zum Eisen eindringen kann.Of particular importance to the invention is the impregnation of the outer surfaces of the sand shells with a water-repellent substance, for example silicone, which means that the shells filled with the metal, e.g. with water or water vapor, can be quenched without quenching liquid can penetrate through the sand bowls (masks) to the iron.
Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass insbesondere bei graphitisch erstarrendem Eisen durch die oben erwähnte Volumenkompensation ein speiserloses Giessen möglich ist und bei Aluminium und dessen Legierungen eine Gasblasenbildung aus dem Metall unterdrückt werden kann. Dabei bedeutet ein speiserloses Giessen ein höheres Metallausbringen und damit eine bessere Wirtschaftlichkeit.The advantages achieved by the invention are essentially to be seen in the fact that, in particular in the case of graphitically solidifying iron, the above-mentioned volume compensation enables feedless casting and in aluminum and its alloys gas bubble formation from the metal can be suppressed. A feeder-free casting means a higher metal yield and thus better economy.
Das erfindungsgemässe Abschrecken der Gussstücke bringt neben den bereits beschriebenen Vorteilen auch eine signifikante Verbesserung der mechanischen Eigenschaften.In addition to the advantages already described, the quenching of the castings according to the invention also brings about a significant improvement in the mechanical properties.
Bei der in Grünsand konventionell vergossenen Aluminiumlegierung G AlSi 8 Cu 3 werden nach DIN 1725 im Gusszussttaanndd eeiimne Zugfestigkeit von 140 N/mm2 bei 0,5 % Dehnung verlangt.
Durch das erfindungsgemässe Verfahren ergeben sich imFor the aluminum alloy G AlSi 8 Cu 3, which is conventionally cast in green sand, a tensile strength of 140 N / mm 2 at 0.5% elongation is required in accordance with DIN 1725. The method according to the invention results in
Gusszustand Festigkeitswerte von 190 N/mm2 bei 2 % Dehnung, nach dem Kaltauslagern sogar Festigkeitswerte vonAs-cast condition Strength values of 190 N / mm 2 at 2% elongation, even strength values of after cold aging
210 N/mm2 bei etwa 2,5 % Dehnung.210 N / mm 2 at about 2.5% elongation.
Wenn die Masken im Wasser entfernt werden ist eine weitere Verbesserung möglich auf Festigkeiten von ca. 300 N/mm2 bei einer Dehnung von 3,5 %. Solche Werte können sonst nur im Druckguss erzielt werden.If the masks are removed in water, a further improvement is possible to a strength of approx. 300 N / mm 2 with an elongation of 3.5%. Otherwise such values can only be achieved in die casting.
Gegenüber dem Druckguss bietet das erfindungsgemässe Verfahren jedoch Kostenvorteile, da die teuren Druckgussformen entfallen.However, the method according to the invention offers cost advantages over die casting since the expensive die casting molds are eliminated.
Die guten, druckgussähnlichen, mechanischen Eigenschaften, der nach dem erfindungsgemässen Verfahren gefertigten Gussstücke sind darauf zurückzuführen, dass einerseits durch die schnelle Wärmeabfuhr ein feinkörniges Gefüge erzeugt wird, und dass andererseits nach dem Abkühlen ähnlich wie beim Druckguss der an Legierungszusätzen angereicherte Mischkristall, je nach Abkühlgeschwindigkeit zum Teil im übersättigten Zustand verbleibt und somit eine gewisse Aushärtungsfähigkeit besitzt.The good, die-cast-like, mechanical properties of the castings produced by the process according to the invention are due to the fact that, on the one hand, a rapid-release heat dissipation produces a fine-grained structure, and on the other hand, after cooling, the mixed crystal enriched with alloy additives, depending on the cooling rate, is similar to the die-casting process partly remains in the supersaturated state and thus has a certain hardening ability.
Die Masken können nach dem Stand der Technik hergestellt werden, z.B. in dem man dem Sand einen Binder zumischt, der aushärtet. Ein solches Verfahren ist das Croning- Verfahren bei dem der Sand durch Phenolharze gebunden wird.The masks can be made according to the prior art, e.g. by adding a binder to the sand that hardens. One such process is the croning process, in which the sand is bound by phenolic resins.
Die Wandstärke der Schalen beträgt vorzugsweise mind. 3 mm. Die schalenförmigen Formteile werden wie üblich zur Giessform komplettiert, wobei die Imprägnierung
z.B. mit Silikon schon vor dem Zusammensetzen, Vorzugsweise jedoch erst nach dem Zusammensetzen, zur Vermeidung von unbehandelten Stellen an der Berührungsfläche der Schalen, erfolgt.The wall thickness of the shells is preferably at least 3 mm. The shell-shaped molded parts are completed as usual to form the mold, with the impregnation For example, with silicone before assembling, but preferably only after assembling to avoid untreated areas on the contact surface of the shells.
Die Sandmasken können im gestützten oder nicht gestützten Zustand mit Äbschreckflüssigkeit bzw. -dampf besprüht werden oder auch vollständig in ein Abschreckbad getaucht werden. Vorzugsweise wird als Abschreckmittel Wasser, bzw. Wasserdampf verwendet.In the supported or unsupported state, the sand masks can be sprayed with quenching liquid or vapor or can be completely immersed in a quenching bath. Water or water vapor is preferably used as a deterrent.
Der Zeitpunkt der Wasserzugabe richtet sich nach dem vergossenen Metall und der Wandstärke des Gusstückes. Bei Aluminium oder sehr dünnwandigem Eisenguss, z.B. Pleuelstangen kann die Form während des Giessens schon mit Wasser umspült sein. Bei dickwandigeren Teilen, z.B. Kurbelwellen erfolgt die Wasserzugabe wenige Sekunden nach dem Abguss.The time of adding water depends on the cast metal and the wall thickness of the casting. For aluminum or very thin-walled cast iron, e.g. Connecting rods can have the mold washed with water during casting. With thick-walled parts, e.g. Crankshafts are watered a few seconds after the casting.
Bei dickwandigen Eisengussteilen empfiehlt sich wegen des auftretenden Erstarrungsdruckes und der grösseren Wärmebelastung eine Stützung der Maske, z.B. gemäss der CH-PS 492 493.In the case of thick-walled iron castings, it is advisable to support the mask, e.g. due to the solidification pressure and the greater heat load. according to CH-PS 492 493.
Als Stützmittel kommen insbesondere Stahlkies, Quarzkies oder Quarzsand, sowie andere körnige Massen in Frage oder auch feste Stützen.Steel gravel, quartz gravel or quartz sand, as well as other granular masses or solid supports are particularly suitable as support means.
In einem geschlossenen Behälter kann zudem die Äbschreckflüssigkeit selbst als Stützmittel verwendet werden.The quenching liquid itself can also be used as a proppant in a closed container.
Entfernt man das Kühlmittel bei einer Temperatur der Maske von 600 - 700º, so glühen die Masken mehr oder weniger durch und zerfallen beim Auspacken. Alternativ kann die
Entfernung der Maske bereits im Wasserbad oder während des Ansprühens mit Abs ehre ckmittel erfolgen , was folgende Vorteile aufweist:If the coolant is removed at a mask temperature of 600 - 700º, the masks glow more or less and disintegrate when unpacking. Alternatively, the The mask is removed in a water bath or while spraying with a spray, which has the following advantages:
a) erhöhte Abschreckwirkung b) Wiederverwendbarkeit der Masken c) Unterdrückung der Bildung giftiger Zersetzungsgase des verwendeten organischen Binders, z.B. Phenolharz, während des Giessens und nach Wegnahme des Kühlmittels.a) increased quenching effect b) reusability of the masks c) suppression of the formation of toxic decomposition gases of the organic binder used, e.g. Phenolic resin, during casting and after removing the coolant.
Wie die CH-PS 583 758 in Tabelle 1 angibt, entwickelt beispielsweise ein Phenolformaldehyd-Binder beim Erhitzen auf Gusstemperatur neben 20 - 25 % Methan auch 25 - 30 % Kohlenmonoxid, welches für den Menschen erhebliche Gefahren aufweist.As stated in CH-PS 583 758 in Table 1, a phenol formaldehyde binder, for example, develops 20 - 25% methane and 25 - 30% carbon monoxide when heated to casting temperature, which has considerable dangers for humans.
Der unter c) erwähnte Vorteil wird aber nur dann erreicht, wenn die Maske auf Temperaturen unterhalb der Phenolharzzersetzungstemperatur (ca. 300° C) abgeschreckt wird.
However, the advantage mentioned under c) is only achieved if the mask is quenched to temperatures below the phenolic resin decomposition temperature (approx. 300 ° C.).
Claims
1. Giessverfahren für Metalle unter Verwendung von schalen förmigen, durch eine chemische Reaktion verfestigte Sandformen, dadurch gekennzeichnet, dass man die Aussen flachen der Sandschalen wasserabstossend macht, die zusammengesetzte Form mit flüssigem Metall füllt und bereits während des Füllvorganges oder kurz danach die mit dem Metall gefüllten Schalen von aussen durch ein flüssiges oder dampfförmiges Medium abschreckt.1. Casting process for metals using shell-shaped sand molds that have been solidified by a chemical reaction, characterized in that the outer surfaces of the sand shells are made water-repellent, the composite mold is filled with liquid metal and already during the filling process or shortly thereafter that with the metal quenched filled shells from the outside by a liquid or vapor medium.
2. Anwendung des Verfahrens nach Anspruch 1 auf Eisen sσhmelzen, vorzugsweise auf graphitisch erstarrende Sorten Grauguss und Gusseisen mit Kugelgraphit, und auf Leichtmetallschmelzen, vorzugsweise von Aluminium, Magnesium oder deren Legierungen.2. Application of the method according to claim 1 on iron melts, preferably on graphite solidifying grades of gray cast iron and spheroidal graphite cast iron, and on light metal melts, preferably of aluminum, magnesium or their alloys.
3. Giesseinrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass sie eine Imprägnierstation und Absσhreckstation, z.B. mit Maskenentfernungsvorrichtung aufweist, in der die Sandformen samt den darin befindlichen Gussstücken bereits während des Füllvorganges oder unmittelbar nach dem Giessen abgeschreckt werden. 3. Casting device for carrying out the method according to claim 1, characterized in that it has an impregnation station and quenching station, for example with a mask removal device, in which the sand molds together with the castings therein are quenched already during the filling process or immediately after the casting.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das flüssige oder dampfföarmige Medium Wasser ist.4. The method according to claim 1, characterized in that the liquid or vapor medium is water.
5. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet dass die gesamte Sandform mit dem Abschreckmedium umspült wird.5. The method according to claim 1 or 4, characterized in that the entire sand mold is washed with the quenching medium.
6. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet, dass die Sandform lediglich mit dem Absehreckmedium besprüht wird.6. The method according to claim 1 or 4, characterized in that the sand mold is sprayed only with the reticle medium.
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass das Abschreckmedium dampfförmig appliziert wird.7. The method according to claim 6, characterized in that the quenching medium is applied in vapor form.
8. Verfahren nach Anspruch 1 oder 4 bis 7, dadurch gekennzeichnet, dass bei Aluminium oder sehr dünnwandigem Eisenguss die Sandform schon während des Giessens mit dem Abschreckmedium umspült wird.8. The method according to claim 1 or 4 to 7, characterized in that in the case of aluminum or very thin-walled iron casting, the sand mold is already washed with the quenching medium during the casting.
9. Verfahren nach Anspruch 1 oder 4 bis 7, dadurch gekennzeichnet, dass bei dickwandigem Eisenguss das Abschrecken wenige Sekunden nach dem Abgiessen erfolgt.9. The method according to claim 1 or 4 to 7, characterized in that the quenching takes place a few seconds after casting in the case of thick-walled iron casting.
10. Verfahren nach Anspruch 1 oder 4 bis 9, dadurch gekennzeichnet, dass die Sandformen auf Temperaturen unterhalb der Zersetzungstemperatur des ehem. Binders abgeschreckt werden.10. The method according to claim 1 or 4 to 9, characterized in that the sand molds are quenched to temperatures below the decomposition temperature of the former binder.
11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass mit Phenolharz ausgehärtete Sandormen auf unter 300ºC abgeschreckt werden.11. The method according to claim 10, characterized in that sand molds hardened with phenolic resin are quenched to below 300 ° C.
12. Verfahren nach Anspruch 1 oder 4 bis 11, dadurch gekenn zeichnet, dass die Sandformen mit Silikon wasserab stossend gemacht werden.12. The method according to claim 1 or 4 to 11, characterized indicates that the sand molds are made water-repellent with silicone.
13. Verfahren nach Anspruch 1 oder 4 bis 12, dadurch gekennzeichnet, dass die Sandformen gestützt werden.13. The method according to claim 1 or 4 to 12, characterized in that the sand molds are supported.
14. Verfahren nach Anspruch 13, dadurch gekennzeichnet, dass das Abschreckmedium in einem geschlossenen System als Stützmittel für die Schalen verwendet wird.14. The method according to claim 13, characterized in that the quenching medium is used in a closed system as a support for the shells.
15. Verfahren nach Anspruch 1 oder 4 bis 14, dadurch gekennzeichnet, dass die Sandformen im zusammengesetzten Zustand wasserabstossend gemacht werden. 15. The method according to claim 1 or 4 to 14, characterized in that the sand molds are made water-repellent in the assembled state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT81902308T ATE9879T1 (en) | 1980-08-29 | 1981-08-04 | METHOD FOR QUENCHING METAL CASTINGS CAST IN SHELL-SHAPED SAND MOLDS, ITS APPLICATION AND AN APPARATUS FOR CARRYING OUT THE METHOD. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH6513/80A CH650430A5 (en) | 1980-08-29 | 1980-08-29 | Method for casting of metals by phenolic bound sand shapes. |
| CH6513/80 | 1980-08-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0058180A1 true EP0058180A1 (en) | 1982-08-25 |
| EP0058180B1 EP0058180B1 (en) | 1984-10-17 |
Family
ID=4310798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81902308A Expired EP0058180B1 (en) | 1980-08-29 | 1981-08-04 | Method for quenching sand hollow forms and cast metallic pieces, application of that method and apparatus for carrying out that method |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0058180B1 (en) |
| JP (1) | JPS57501828A (en) |
| BE (1) | BE890139A (en) |
| BR (1) | BR8108968A (en) |
| CA (1) | CA1165967A (en) |
| CH (1) | CH650430A5 (en) |
| DK (1) | DK190882A (en) |
| FI (1) | FI69412C (en) |
| IT (1) | IT1138537B (en) |
| PT (1) | PT73559B (en) |
| WO (1) | WO1982000786A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180369906A1 (en) * | 2015-04-01 | 2018-12-27 | Saint Jean Industries | Sand shell-moulding method for the production of a part for use in the automotive and aeronautics fields |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2633206B1 (en) * | 1988-06-24 | 1990-10-12 | Peugeot | MOLD FOR MANUFACTURING A METAL PART, USE OF SUCH MOLD AND CORRESPONDING MOLDING METHOD |
| FR2680125B1 (en) * | 1991-08-09 | 1995-02-17 | Peugeot | CARAPACE MOLDING METHOD AND DEVICE WITH COOLED RIGID SHELL. |
| DE10357618B4 (en) * | 2003-12-10 | 2008-01-24 | Bender, Wilfried, Dr. | Method for producing a casting from a molten metal |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE734046C (en) * | 1941-05-20 | 1943-04-07 | Heinrich Lanz Ag | Process to prevent the penetration of moisture from the filler sand into the model sand layer in casting molds |
| FR1039893A (en) * | 1950-08-04 | 1953-10-12 | Ford | Method and apparatus for heat treatments, such as quenching castings |
| US2968848A (en) * | 1959-01-02 | 1961-01-24 | Richard T Carter | Method of casting refractory shells |
| US2985929A (en) * | 1959-12-18 | 1961-05-30 | Richard T Carter | Method and apparatus for support and cooling of shell molds |
| DE1241051B (en) * | 1961-08-12 | 1967-05-24 | Deutsche Edelstahlwerke Ag | Device for casting metallic workpieces |
| FR1351085A (en) * | 1963-03-12 | 1964-01-31 | Foundry mold | |
| US3409069A (en) * | 1966-02-01 | 1968-11-05 | Amsted Ind Inc | Method of casting steel in a shell mold |
| US3404724A (en) * | 1966-02-01 | 1968-10-08 | Amsted Ind Inc | Method of casting in a shell molding |
| JPS5638565Y2 (en) * | 1977-08-06 | 1981-09-09 | ||
| DE2806995A1 (en) * | 1978-02-18 | 1979-08-30 | Avesta Jernverks Ab | Pouring metal without turbulence into thin walled mould - gradually lowered into cooling bath during casting from horizontal into vertical position (SW 22.5.78) |
-
1980
- 1980-08-29 CH CH6513/80A patent/CH650430A5/en not_active IP Right Cessation
-
1981
- 1981-08-04 EP EP81902308A patent/EP0058180B1/en not_active Expired
- 1981-08-04 JP JP56502615A patent/JPS57501828A/ja active Pending
- 1981-08-04 WO PCT/EP1981/000110 patent/WO1982000786A1/en active IP Right Grant
- 1981-08-04 BR BR8108968A patent/BR8108968A/en unknown
- 1981-08-24 PT PT73559A patent/PT73559B/en unknown
- 1981-08-28 IT IT23692/81A patent/IT1138537B/en active
- 1981-08-28 CA CA000384792A patent/CA1165967A/en not_active Expired
- 1981-08-28 BE BE0/205805A patent/BE890139A/en not_active IP Right Cessation
-
1982
- 1982-04-28 DK DK190882A patent/DK190882A/en not_active Application Discontinuation
- 1982-09-28 FI FI823324A patent/FI69412C/en not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8200786A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180369906A1 (en) * | 2015-04-01 | 2018-12-27 | Saint Jean Industries | Sand shell-moulding method for the production of a part for use in the automotive and aeronautics fields |
Also Published As
| Publication number | Publication date |
|---|---|
| FI823324A0 (en) | 1982-09-28 |
| EP0058180B1 (en) | 1984-10-17 |
| DK190882A (en) | 1982-04-28 |
| CH650430A5 (en) | 1985-07-31 |
| CA1165967A (en) | 1984-04-24 |
| FI69412C (en) | 1986-02-10 |
| BR8108968A (en) | 1983-01-11 |
| PT73559A (en) | 1981-09-01 |
| FI823324L (en) | 1982-09-28 |
| IT8123692A0 (en) | 1981-08-28 |
| FI69412B (en) | 1985-10-31 |
| PT73559B (en) | 1983-01-17 |
| JPS57501828A (en) | 1982-10-14 |
| WO1982000786A1 (en) | 1982-03-18 |
| IT1138537B (en) | 1986-09-17 |
| BE890139A (en) | 1981-12-16 |
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