EP0058180B1 - 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 Download PDFInfo
- Publication number
- EP0058180B1 EP0058180B1 EP81902308A EP81902308A EP0058180B1 EP 0058180 B1 EP0058180 B1 EP 0058180B1 EP 81902308 A EP81902308 A EP 81902308A EP 81902308 A EP81902308 A EP 81902308A EP 0058180 B1 EP0058180 B1 EP 0058180B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sand
- process according
- quenching
- quenched
- casting
- 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.)
- Expired
Links
- 239000004576 sand Substances 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 31
- 238000010791 quenching Methods 0.000 title claims description 17
- 230000000171 quenching effect Effects 0.000 title claims description 17
- 238000005266 casting Methods 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000005871 repellent Substances 0.000 claims description 5
- 239000000126 substance Substances 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 238000005429 filling process Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 2
- 238000005058 metal casting Methods 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 claims 2
- 239000004411 aluminium Substances 0.000 claims 2
- 229910001060 Gray iron Inorganic materials 0.000 claims 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- 239000007767 bonding agent Substances 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 24
- 238000001816 cooling Methods 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 238000004512 die casting Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 229920001568 phenolic resin Polymers 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000007787 solid Substances 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
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 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
- 230000000694 effects Effects 0.000 description 1
- -1 granular masses Chemical compound 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel 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 method for quenching metal castings cast in shell-shaped sand molds solidified by a chemical binder, the use of this method, and a device suitable for carrying out the method.
- a method of the type mentioned has become known as a so-called hard casting process (FR-A-1 039893), in which a hard edge shell is produced on the casting by the direct cooling of the surface of the casting through the sand.
- the castings are quenched through the sand in a shock-like manner, with the cooling medium making direct contact with the casting.
- This method is not suitable for producing a fine-grained structure.
- the additional volume resulting from the graphite precipitation should be used in an inward-facing manner to compensate for the solidification volume deficit.
- this is achieved in that the sand shells are made water-repellent before or after assembly and the sand mold filled with liquid metal is quenched from the outside during or shortly after the filling process by a liquid or gaseous medium.
- 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 gives strength values of 190 N / mm 2 at 2% elongation in the as-cast state, and even strength values of 210 N / mm 2 at about 2.5% elongation after cold aging.
- 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 sand bowls can be made according to the prior art, e.g. B. 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.
- the wall thickness of the shells is preferably at least 3 mm.
- the sand bowls are completed as usual to the mold, the impregnation z. B. with silicone before assembly, but preferably only after assembly, to avoid untreated areas on the contact surface of the shells.
- the sand bowls can be sprayed with quenching liquid or vapor in the supported or unsupported state or can be completely immersed in a quenching bath will.
- Water or steam is preferably used as the quenching agent.
- the time of adding water depends on the cast metal and the wall thickness of the casting.
- the mold can already be washed with water during casting.
- thick-walled parts e.g. B. Crankshafts are added a few seconds after pouring.
- steel gravel, quartz gravel or quartz sand, as well as other granular masses, or also solid supports, are suitable as support means.
- the quenching liquid itself can also be used as a proppant.
- olformaldehyde binder develops 20-30% methane and 25-30% carbon monoxide when heated to the casting temperature, which has considerable dangers for humans.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zum Abschrecken von in schalenförmigen durch ein chemisches Bindemittel verfestigte Sandformen vergossenen Metallgussstücken, die Anwendung dieses Verfahrens, sowie eine zur Durchführung des Verfahrens geeignete Vorrichtung.The invention relates to a method for quenching metal castings cast in shell-shaped sand molds solidified by a chemical binder, the use of this method, and a device suitable for carrying out the method.
Ein Verfahren der eingangs genannten Art ist als sogenanntes Schalenhartgussverfahren bekanntgeworden (FR-A-1 039893), bei welchem durch die direkte Kühlung der Oberfläche des Gussstückes durch den Sand hindurch eine harte Randschale am Gussstück erzeugt wird. Das Abschrecken der Gussstücke erfolgt schockartig durch den Sand hindurch, wobei ein direkter Kontakt des Kühlmediums mit dem Gussstück erfolgt. Zur Erzeugung eines feinkörnigen Gefüges ist dieses Verfahren nicht geeignet.A method of the type mentioned has become known as a so-called hard casting process (FR-A-1 039893), in which a hard edge shell is produced on the casting by the direct cooling of the surface of the casting through the sand. The castings are quenched through the sand in a shock-like manner, with the cooling medium making direct contact with the casting. This method is not suitable for producing a fine-grained structure.
Ferner sind Verfahren zur Kühlung von dauerhaften Metallformen mittels Kühlkanälen in den Formen bekannt, wie beispeilsweise die CH-A-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, as is shown, for example, by CH-A-557 209. However, such a cooling method is not applicable to sand molds.
Es ist Aufgabe der vorliegenden Erfindung, ein Verfahren der eingangs genannten Art zu schaffen, bei welchem in der erstarrenden Metallform schnell eine tragfähige Randschale gebildet und ein feinkörniges Gefüge erzeugt wird, ohne dass das Gussstück direkt mit dem Abschreckmedium in Berührung gebracht wird. Insbesondere soll bei graphitisch erstarrendenem Eisen, das durch die Graphitausscheidung entstehende Mehrvolumen in nach Innen gerichteter Weise zum Ausgleich des Erstarrungsvolumendefizites verwendet werden.It is an object of the present invention to provide a method of the type mentioned in the introduction, in which a solid edge shell is quickly formed in the solidifying metal mold and a fine-grained structure is produced without the casting being brought into direct contact with the quenching medium. In particular, in the case of graphite 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.
Erfindungsgemäss wird dies in verfahrenstechnischer Hinsicht dadurch erreicht, dass man die Sandschalen vor oder nach dem Zusammensetzen wasserabstossend macht und die mit flüssigem Metall gefüllte Sandform während oder kurz nach dem Füllvorgang von aussen durch ein flüssiges oder gasförmiges Medium abschreckt.In terms of process engineering, this is achieved in that the sand shells are made water-repellent before or after assembly and the sand mold filled with liquid metal is quenched from the outside during or shortly after the filling process by a liquid or gaseous medium.
Besonders vorteilhafte Verfahrensmerkmale, sowie deren Anwendung und eine Vorrichtung zur Durchführung des Verfahrens sind in den übrigen Ansprüchen gekennzeichnet.Particularly advantageous method features, as well as their use and a device for carrying out the method are characterized in the remaining claims.
Es ist zwar bekannt (DE-C-734 046) bei aus Natursand hergestellten Sandformen eine wasserundurchlässige Schicht anzuordnen, jedoch ist diese lediglich zur Verhütung des Vordringens der Feuchtigkeit aus dem Füllsand in die Modellsandschicht nach dem Trocknen der letzteren angeordnet und dient somit auch nicht zur Lösung der gestellten Aufgabe.It is known (DE-C-734 046) to arrange a water-impermeable layer in sand molds made from natural sand, but this is only arranged to prevent the penetration of moisture from the filling sand into the model sand layer after the latter has dried and is therefore also not used Solution of the task.
Von besonderer, erfindungswesentlicher Bedeutung ist dabei die Imprägnierung der Aussenflächen 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 Abschreckflüssigkeit durch die Sandschalen, - auch Masken genannt -, zum Metall 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, so that the shells filled with the metal from the outside, e.g. B. with water or steam, can be quenched without quenching liquid penetrating through the sand shells, also called masks, to the metal.
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 volume compensation mentioned above makes it possible to cast without a feeder 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 beereits 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 AISi 8 Cu 3 werden nach DIN 1725 im Gusszustand eine Zugfestigkeit von 140 N/mm2 bei 0,5% Dehnung verlangt.With the cast aluminum alloy G AISi 8 Cu 3 conventionally cast in green sand, a tensile strength of 140 N / mm 2 at 0.5% elongation is required in accordance with DIN 1725 in the as-cast state.
Durch das erfindungsgemässe Verfahren ergeben sich im Gusszustand Festigkeitswerte von 190 N/mm2 bei 2 % Dehnung, nach dem Kaltauslagern sogar Festigkeitswerte von 210 N/mm2 bei etwa 2,5 % Dehnung.The method according to the invention gives strength values of 190 N / mm 2 at 2% elongation in the as-cast state, and even strength values of 210 N / mm 2 at about 2.5% elongation after cold aging.
Wenn die Sandschalen 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 sand shells are removed in the 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 Sandschalen 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 sand bowls can be made according to the prior art, e.g. B. 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 mindestens 3 mm. Die Sandschalen 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 sand bowls are completed as usual to the mold, the impregnation z. B. with silicone before assembly, but preferably only after assembly, to avoid untreated areas on the contact surface of the shells.
Die Sandschalen können im gestützten oder nicht gestützten Zustand mit Abschreckflüssigkeit bzw. -dampf besprüht werden oder auch vollständig in ein Abschreckbad getaucht werden. Vorzugsweise wird als Abschreckmittel Wasser, bzw. Wasserdampf verwendet.The sand bowls can be sprayed with quenching liquid or vapor in the supported or unsupported state or can be completely immersed in a quenching bath will. Water or steam is preferably used as the quenching agent.
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. B. connecting rods, the mold can already be washed with water during casting. With thick-walled parts, e.g. B. Crankshafts are added a few seconds after pouring.
Bei dickwandigen Eisengussteilen empfiehlt sich wegen des auftretenden Erstarrungsdruckes und der grösseren Wärmebelastung eine Stützung der Schale, z. B. gemäss der CH-A-492 493.In the case of thick-walled cast iron parts, it is advisable to support the shell, for example because of the solidification pressure and the greater thermal load. B. according to CH-A-492 493.
Als Stützmittel kommen insbesondere Stahlkies, Quarzkies oder Quarzsand, sowie andere körnige Massen in Frage oder auch feste Stützen. In einem geschlossenen Behälter kann zudem die Abschreckflüssigkeit selbst als Stützmittel verwendet werden.In particular, steel gravel, quartz gravel or quartz sand, as well as other granular masses, or also solid supports, are suitable as support means. In a closed container, the quenching liquid itself can also be used as a proppant.
Entfernt man das Kühlmittel bei einer Temperatur der Sandschale von 600-700°, so glühen die Schalen mehr oder weniger durch und zerfallen beim Auspacken. Alternativ kann die Entfernung der Schale bereits im Wasserbad oder während des Ansprühens mit Abschreckmittel erfolgen, was folgende Vorteile aufweist :
- a) erhöhte Abschreckwirkung
- b) Wiederverwendbarkeit der Sandschalen
- c) Unterdrückung der Bildung giftiger Zersetzungsgase des verwendeten organischen Binders, z. B. Phenolharz, während des Giessens und nach Wegnahme des Kühlmittels.
- a) increased deterrent effect
- b) Reusability of the sand bowls
- c) suppression of the formation of toxic decomposition gases of the organic binder used, e.g. B. phenolic resin, during casting and after removal of the coolant.
Wie die CH-A-583 758 in Tabelle 1 angibt, entwickelt beispielsweise ein Pher,olforma!dehyd-Binder beim Erhitzen auf Gusstemperatur neben 20-25 % Methan auch 25-30 % Kohlenmonoxid, welches für den Menschen erhebliche Gefahren aufweist.As stated in CH-A-583 758 in Table 1, for example a pher, olformaldehyde binder develops 20-30% methane and 25-30% carbon monoxide when heated to the casting temperature, which has considerable dangers for humans.
Der unter c) erwähnte Vorteil wird aber nur dann erreicht, wenn die Sandschale auf Temperaturen unterhalb der Phenolharzzersetzungstemperatur (ca. 300 °C) abgeschreckt wird.The advantage mentioned under c) is only achieved if the sand shell is quenched to temperatures below the phenolic resin decomposition temperature (approx. 300 ° C.).
Claims (12)
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 EP0058180A1 (en) | 1982-08-25 |
| EP0058180B1 true 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) |
Families Citing this family (4)
| 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 |
| FR3034332A1 (en) * | 2015-04-01 | 2016-10-07 | Saint Jean Ind | PROCESS FOR SANDING CARAPLE MOLDING FOR THE PRODUCTION OF A PART IN THE AUTOMOTIVE AND AERONAUTICS FIELD |
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 JP JP56502615A patent/JPS57501828A/ja active Pending
- 1981-08-04 EP EP81902308A patent/EP0058180B1/en not_active Expired
- 1981-08-04 BR BR8108968A patent/BR8108968A/en unknown
- 1981-08-04 WO PCT/EP1981/000110 patent/WO1982000786A1/en active IP Right Grant
- 1981-08-24 PT PT73559A patent/PT73559B/en unknown
- 1981-08-28 BE BE0/205805A patent/BE890139A/en not_active IP Right Cessation
- 1981-08-28 IT IT23692/81A patent/IT1138537B/en active
- 1981-08-28 CA CA000384792A patent/CA1165967A/en not_active Expired
-
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
Also Published As
| Publication number | Publication date |
|---|---|
| PT73559B (en) | 1983-01-17 |
| DK190882A (en) | 1982-04-28 |
| IT1138537B (en) | 1986-09-17 |
| CH650430A5 (en) | 1985-07-31 |
| FI69412C (en) | 1986-02-10 |
| PT73559A (en) | 1981-09-01 |
| FI823324A0 (en) | 1982-09-28 |
| JPS57501828A (en) | 1982-10-14 |
| IT8123692A0 (en) | 1981-08-28 |
| WO1982000786A1 (en) | 1982-03-18 |
| BR8108968A (en) | 1983-01-11 |
| BE890139A (en) | 1981-12-16 |
| CA1165967A (en) | 1984-04-24 |
| FI69412B (en) | 1985-10-31 |
| FI823324L (en) | 1982-09-28 |
| EP0058180A1 (en) | 1982-08-25 |
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