EP0413885B1 - Low pressure die casting process for casting non ferrous metal casting parts - Google Patents
Low pressure die casting process for casting non ferrous metal casting parts Download PDFInfo
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- EP0413885B1 EP0413885B1 EP90101401A EP90101401A EP0413885B1 EP 0413885 B1 EP0413885 B1 EP 0413885B1 EP 90101401 A EP90101401 A EP 90101401A EP 90101401 A EP90101401 A EP 90101401A EP 0413885 B1 EP0413885 B1 EP 0413885B1
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- casting
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- sprue
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Definitions
- the invention relates to a low-pressure mold casting process for casting metal castings, such as cylinder heads or engine blocks of internal combustion engines or the like, which castings in some areas have predominantly thinner walls than in their other areas, in which process by means of gas pressure through liquid metal from a melting tank a riser pipe is pressed into a mold.
- the mold is introduced from below and a smooth metal flow is given in the mold of rising metal, the casting speed being adaptable in each phase to the desired mold filling.
- the casting molds are created in the known low-pressure casting process so that the thickest wall parts of the casting in the vicinity of the sprue, the thin-walled areas away from it.
- the invention has for its object to avoid these disadvantages of the known low-pressure mold casting process.
- This is achieved according to the invention in that, in this casting process, the mold is arranged in such a way that its mold cavities, which form the predominantly thicker wall of the casting, are close to the gate and their mold cavities, which form the predominantly thinner wall, are close to the gate, the liquid metal lying on or near the gate Area of the mold is introduced into the mold cavities forming the thinner wall.
- the mold cavities remote from the gate will be at the top and the mold cavities near the gate will be at the bottom.
- the metal fed in is cooled in these mold areas when it rises within the mold, so that it is at relatively low temperatures in the molds above it.
- the thicker wall of the casting forming larger mold cavities comes without running the risk that any mold cavities can not be filled sufficiently.
- the heating of the thinner mold cross sections through which the entire metal volume flows prevents premature freezing of the mold cavities close to the gate.
- the liquid metal is expediently introduced via a bottom run at several sprue points to the region of the mold close to the gate into the mold cavities forming the thinner wall of the cast part.
- the mold cavities close to the gate are heated by the flowing metal to such an extent that, despite the small cross-sections, they are prevented from freezing for a relatively long time and, at least in some areas, the mold can be replenished during a holding pressure phase.
- this entry cross section will generally be solidified in front of the distant regions of the casting.
- the low-pressure casting furnace is not rigidly coupled to a casting mold, but rather operates several casting molds in a cyclical alternation. The faster the inlet cross section of the casting mold solidifies, the sooner the riser pipe of the low-pressure furnace can be uncoupled from the casting mold and connected to another casting mold for the next casting cycle.
- the mold 1 shown in cross section in FIG. 1 is used to cast a cylinder head which has a thicker wall on its one combustion chamber-delimiting side and in its adjoining area than on its opposite side and in the adjoining area.
- the combustion chamber of this cylinder head is limited by the thicker walls which are formed or surrounded in the mold by the upper, obliquely extending, wider mold cavities 5 in FIG. 1.
- This mold is connected with several sprue points 2 via a bottom run 3 to the end 4 of a riser pipe of a low-pressure mold casting machine, not shown, in such a way that its mold cavities 5 forming the thicker wall of the cylinder head are at the top and their mold cavities 6 forming the thinner wall of the cylinder head are at the bottom .
- the molten cast metal is first introduced into the lower, mostly smaller or slimmer mold cavities 6 via the bottom run 3. Through these mold cavities 6, the introduced metal rises essentially turbulence-free and calmly in the mold upwards into the upper mostly larger or thicker mold cavities 5 and into the feeder 7 placed on the mold, which serves to make up the upper one Mold cavities 5 can be useful.
- the make-up of the lower mold cavities 6 takes place via the riser pipe and the bottom run from the sprue side.
- the mold 11 shown in cross section in FIG. 2 is used to cast a cylinder block which generally has a thinner wall on its side delimiting the crankshaft space 18 and in its adjoining areas than in the areas above it.
- This mold is also connected with several sprue points 12 via a bottom run 13 to the end 14 of a riser pipe of a low-pressure mold casting machine, not shown, in such a way that its mold cavities 15 forming the thicker wall of the cylinder block are at the top and their mold cavities forming the thinner wall of the cylinder block 16 are below.
- the molten casting metal is first introduced into the bottom, mostly smaller or slimmer mold cavities 16 via the bottom run 13, through which mold cavities the metal is essentially turbulence-free and quiet in the mold upwards into the upper, mostly larger mold cavities 5 and into the mounted on the mold feeder 17.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Glass Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Continuous Casting (AREA)
- Casting Devices For Molds (AREA)
Abstract
Description
Die Erfindung betrifft ein Niederdruck-Kokillen-Gießverfahren zum Gießen von Metallgußteilen, wie Zylinderköpfe oder Motorblöcke von Brennkraftmaschinen od.dgl., welche Gußteile bereichsweise überwiegend dünnere Wandung als an in ihren übrigen Bereichen besitzen, bei welchem Verfahren mittels Gasdruck flüssiges Metall aus einem Schmelzbehälter durch ein Steigrohr in eine Form gedrückt wird.The invention relates to a low-pressure mold casting process for casting metal castings, such as cylinder heads or engine blocks of internal combustion engines or the like, which castings in some areas have predominantly thinner walls than in their other areas, in which process by means of gas pressure through liquid metal from a melting tank a riser pipe is pressed into a mold.
Während bei bekannten Schwerkraft-Kokillen-Gießverfahren ein über die gesamte Kokillenhöhe herabfallender Metalleinguß erfolgt, wodurch in der Form starke Turbulenzen mit den bekannten nachteiligen Folgen für das Metallgefüge auftreten, ist beim bekannten Niederdruck-Kokillen-Gießverfahren durch das in die Form von unten her eingebrachte und in der Form hochsteigende Metall ein ruhiger Metallfluß gegeben, wobei die Gießgeschwindigkeit in jeder Phase der gewünschten Formfüllung angepaßt werden kann. Nach bisher allgemein akzeptierter Lehre werden beim bekannten Niederdruckgießverfahren die Gießformen so angelegt, daß die dicksten Wandpartien des Gußteiles in Angußnähe, die dünnwandigeren Bereiche entfernt davon liegen. Dies geschieht in der Absicht, die Dichtspeisung des Gußteiles während seiner Erstarrung ausschließlich durch vom Steigrohr her nachgedrückte Schmelze zu ermöglichen, d.h. die Erstarrung soll von angußfernen Bereichen des Gußteiles her zum Anguß hin verlaufen (siehe DE-A-32 47 129 und Handbuch "Kokillen für Leichtmetallguß" von Prof. Dr. Philipp Schneider, Gießerei-Verlag 1986, S. 205, 206). Da bei einer solchen Lagevorgabe für die Form die angußnahen überwiegend dickwandigen Bereiche der Gußteile in der Form relativ langsam erstarren, ist die Bildung eines grobkristallinen Gefüges mit Ausscheidungen grober intermetallischer Verbindungen in diesem Bereich des Gußteils die Folge. Dies hat sich jedoch bei Gußteilen, die bei ihrer Verwendung im Bereich ihrer vorwiegend dickeren Wandung höheren Beanspruchungen ausgesetzt sind, wie dies beispielsweise bei Zylinderköpfen im Brennraumbereich der Fall ist, als sehr unbefriedigend erwiesen. Ein weiterer Nachteil dieser bekannten Verfahrensweise ist darin zu sehen, daß mit Rücksicht auf eine einwandfreie Formfüllung in den anfußfernen dünnwandigen Bereichen mit entsprechend überhöhter Gießtemperatur gearbeitet werden muß, was sich andererseits nachteilig auf die gesamte Erstarrungszeit, d.h. die Dauer eines Gießzyklusses und auch auf die Gußqualität auswirken muß.While in known gravity mold casting processes there is a metal pouring down over the entire mold height, causing strong turbulence in the mold with the known disadvantageous consequences for the metal structure, in the known low pressure mold casting process the mold is introduced from below and a smooth metal flow is given in the mold of rising metal, the casting speed being adaptable in each phase to the desired mold filling. According to the generally accepted teaching so far, the casting molds are created in the known low-pressure casting process so that the thickest wall parts of the casting in the vicinity of the sprue, the thin-walled areas away from it. This is done with the intention of enabling the casting to be supplied with sealing exclusively during its solidification by means of melt pressed in from the riser pipe, ie the solidification should run from regions of the casting away from the sprue towards the sprue (see DE-A-32 47 129 and the manual "molds") für Leichtmetallguß "by Prof. Dr. Philipp Schneider, Gießerei-Verlag 1986, pp. 205, 206). Since the predominantly thick-walled areas of the castings close to the gate solidify in the mold relatively slowly with such a positional specification for the mold, the formation of a coarsely crystalline structure with precipitations of coarse intermetallic compounds in this area of the cast part is the result. However, this has proven to be very unsatisfactory for castings which, when used in the area of their predominantly thicker wall, are subjected to higher loads, as is the case, for example, with cylinder heads in the combustion chamber area. Another disadvantage of this known procedure is the fact that, with due regard to proper mold filling in the thin-walled areas remote from the base, a correspondingly high casting temperature must be used, which on the other hand affects the entire solidification time, i.e. the duration of a casting cycle and also the casting quality must impact.
Der Erfindung liegt die Aufgabe zugrunde, diese Nachteile des bekannten Niederdruck-Kokillen-Gießverfahrens zu vermeiden. Dies wird erfindungsgemäß dadurch erreicht, daß bei diesem Gießverfahren die Form so angeordnet wird, daß ihre die überwiegend dickere Wandung des Gußteiles bildenden Formhohlräume angußfern und ihre die überwiegend dünnere Wandung bildenden Formhohlräume angußnahe liegen, wobei das flüssige Metall an oder nahe dem angußnahe liegenden Bereich der Form in die die dünnere Wandung bildenden Formhohlräume eingeleitet wird. In der Regel werden dabei die angußfernen Formhohlräume oben und die angußnahen Formhohlräume unten liegen. Es hat sich herausgestellt, daß mit dieser im Gegensatz zur langjährigen bisher streng eingehaltenen Praxis stehenden Verfahrensweise besonders einwandfreie Gußteile unter vorteilhaften Produktionsbedingungen erhalten werden. Durch die beim Niederdruck-Gießverfahren gegebene turbulenzfreie Formfüllung werden dabei Schaumbildung und Oxideinschlüsse vermieden und insgesamt werden günstige Voraussetzungen für die Erzeugung hochwertiger Gußteile geschaffen.The invention has for its object to avoid these disadvantages of the known low-pressure mold casting process. This is achieved according to the invention in that, in this casting process, the mold is arranged in such a way that its mold cavities, which form the predominantly thicker wall of the casting, are close to the gate and their mold cavities, which form the predominantly thinner wall, are close to the gate, the liquid metal lying on or near the gate Area of the mold is introduced into the mold cavities forming the thinner wall. As a rule, the mold cavities remote from the gate will be at the top and the mold cavities near the gate will be at the bottom. It has been found that this procedure, in contrast to the long-standing practice which has been strictly adhered to up to now, gives particularly flawless castings under advantageous production conditions. Due to the turbulence-free mold filling in the low-pressure casting process, foam formation and oxide inclusions are avoided and overall favorable conditions are created for the production of high-quality castings.
Durch die Einspeisung des flüssigen Metalls in die angußnahe liegenden, die dünnere Wandung des Gußteils bildenden und damit kleineren Durchtrittsquerschnitt besitzenden Formhohlräume wird das eingespeiste Metall in diesen Formbereichen bei seinem Hochsteigen innerhalb der Form abgekühlt, so daß es mit relativ niedrigen Temperaturen in die darüber befindlichen, die dickere Wandung des Gußteils bildenden größeren Formhohlräume gelangt, ohne Gefahr zu laufen, daß irgendwelche Formhohlräume nicht ausreichend gefüllt werden können. Dabei verhindert die Aufheizung der vom gesamten Metallvolumen durchströmten dünneren angußnahen Formquerschnitte ein vorzeitiges Einfrieren der angußnahen Formhohlräume. Die im Vergleich zum Schwerkraftkokillenguß beim Niederdruckgießverfahren ohne Gefahr von Turbulenzen mögliche relativ große Formfüllgeschwindigkeit erlaubt es sogar, daß die Wandung des Gußteiles in diesem Bereich dünner als herkömmlich ausgebildet werden kann, wenn dies bei dem zu gießenden Gußteil aus Festigkeitsgründen tragbar ist, wodurch eine Materialkostenersparnis bei dem herzustellenden Gußteil erreicht werden kann. Die Herstellung eines Gußteiles mit zumindest bereichsweise dünnerer Wandung bietet wiederum den Vorteil, daß insgesamt geringere Metallvolumina gefördert und bei ihrer Erstarrung dichtgespeist werden müssen und daß der gesamte aus Formfüllzeit, Erstarrungsdauer und Rüstzeit bestehende Gießzyklus verkürzt wird.By feeding the liquid metal into the mold cavities close to the sprue, which form the thinner wall of the casting and thus have a smaller passage cross section, the metal fed in is cooled in these mold areas when it rises within the mold, so that it is at relatively low temperatures in the molds above it. the thicker wall of the casting forming larger mold cavities comes without running the risk that any mold cavities can not be filled sufficiently. The heating of the thinner mold cross sections through which the entire metal volume flows prevents premature freezing of the mold cavities close to the gate. The relatively high mold filling speed that is possible compared to gravity die casting in the low-pressure casting process without the risk of turbulence even allows the wall of the casting to be made thinner in this area than is conventional if this can be carried out for reasons of strength in the casting to be cast, thereby saving material costs the casting to be manufactured can be achieved. The production of a casting with The thinner wall, at least in some areas, offers the advantage that overall smaller metal volumes have to be conveyed and densely fed when they solidify and that the entire casting cycle consisting of mold filling time, solidification time and set-up time is shortened.
Da bei dem erfindungsgemäßen Verfahren das im steigenden Niederdruck-Kokillenguß in die oberen größeren Formhohlräume gelangende Metall bereits weitgehend abgekühlt ist, wird eine rasche Erstarrung des Metalls in diesem Bereich erreicht, die zu einem feinkristallinen Gefüge im Gußteil führt, welches die Gewähr für dessen optimale Festigungseigenschaften bietet. Hierdurch wird es mit dem erfindungsgemäßen Verfahren möglich, Gußteile, wie Zylinderköpfe, Motorblöcke od. dgl., auch in ihren beanspruchten Bereichen, mit geringeren Wanddicken als heute üblich herzustellen, ohne daß die Gefahr gegeben ist, daß sie den Anforderungen an ausreichende Festigkeit bei ihrem Einsatz nicht mehr gewachsen sind. Geringere Wanddicken des Gußteils auch in diesen Bereichen bedeuten aber wiederum schnellere Formfüllung und raschere Erstarrung des Gußteils und damit bessere Materialeigenschaften.Since, in the process according to the invention, the metal reaching the upper, larger mold cavities in the increasing low-pressure die casting has already largely cooled, rapid solidification of the metal is achieved in this area, which leads to a fine crystalline structure in the casting, which guarantees its optimal strengthening properties offers. This makes it possible with the method according to the invention to produce castings, such as cylinder heads, engine blocks or the like, even in their stressed areas, with smaller wall thicknesses than is customary today, without the risk that they meet the requirements for sufficient strength in their Use no longer have grown. Thinner wall thicknesses of the cast part also in these areas mean faster mold filling and faster solidification of the cast part and thus better material properties.
Bei dem erfindungsgemäßen Verfahren wird zweckmäßig das flüssige Metall über einen Bodenlauf an mehreren Angußstellen dem angußnahe liegenden Bereich der Form in die die dünnere Wandung des Gußteiles bildenden Formhohlräume eingeleitet. Die anschnittnahen Formhohlräume werden vom durchströmenden Metall soweit aufgeheizt, daß sie trotz geringer Querschnitte relativ lange vor einem Einfrieren bewahrt werden und wenigstens bereichsweise eine Nachspeisung der Form während einer Nachdruckphase vom Anguß her vorgenommen werden kann.In the method according to the invention, the liquid metal is expediently introduced via a bottom run at several sprue points to the region of the mold close to the gate into the mold cavities forming the thinner wall of the cast part. The mold cavities close to the gate are heated by the flowing metal to such an extent that, despite the small cross-sections, they are prevented from freezing for a relatively long time and, at least in some areas, the mold can be replenished during a holding pressure phase.
Erforderlichenfalls ist eine weitere Nachspeisung von flüssigem Metall an mehreren Stellen der angußfernen Seite der Form durch aufgesetzte Speiser in die die dickere Wandung des Gußteils bildenden größeren Formhohlräume möglich. Da diese Nachspeisung meist nur eine geringe Reichweite haben muß, genügen relativ kleine Speiseraufsätze, wodurch wiederum eine unerwünschte Aufheizung der gesamten Form, insbesondere des oberen Formbereichs, durch das in den Speisern befindliche flüssige Metall weitgehend vermieden wird.If necessary, a further replenishment of liquid metal at several points on the side of the mold remote from the sprue is possible through attached feeders into the larger mold cavities forming the thicker wall of the casting. Since this make-up usually only has to have a short range, relatively small feeder attachments are sufficient, which in turn undesirable heating of the entire mold, in particular the upper mold region, is largely avoided by the liquid metal present in the feeders.
Im Gegensatz zum bekannten Niederdruckgießverfahren, das im Prinzip darauf angelegt ist, den an der Steigrohrmündung gelegenen Eintrittsquerschnitt der Gießform als letzten Abschnitt des Gußteiles erstarren zu lassen, wird beim erfindungsgemäßen Verfahren dieser Eintrittsquerschnitt in der Regel vor den entfernter liegenden Bereichen des Gußteiles erstarrt sein. Das ist insbesondere dann von Vorteil, wenn der Niederdruckgießofen nicht starr mit einer Gießform verkoppelt ist, sondern im zyklischen Wechsel mehrere Gießformen bedient. Je schneller der Eintrittsquerschnitt der Gießform erstarrt, um so eher kann das Steigrohr des Niederdruckofens von der Gießform abgekoppelt und für den nächsten Gießzyklus mit einer anderen Gießform verbunden werden.In contrast to the known low-pressure casting process, which in principle is designed to solidify the inlet cross section of the casting mold located at the mouth of the riser pipe as the last section of the casting, in the method according to the invention this entry cross section will generally be solidified in front of the distant regions of the casting. This is particularly advantageous if the low-pressure casting furnace is not rigidly coupled to a casting mold, but rather operates several casting molds in a cyclical alternation. The faster the inlet cross section of the casting mold solidifies, the sooner the riser pipe of the low-pressure furnace can be uncoupled from the casting mold and connected to another casting mold for the next casting cycle.
Im folgenden wird das erfindungsgemäße Gießverfahren anhand der Zeichnung näher beschrieben.
- Fig. 1
- der Zeichnung zeigt eine an ein Steigrohr einer Niederdruckkokillengießmaschine angeschlossene Kokille zum Gießen eines Zylinderkopfes im Querschnitt in schematischer Darstellung.
- Fig. 2
- zeigt in zwei verschiedenen Teilschnitten eine an ein Steigrohr einer Niederdruckkokillengießmaschine angeschlossenen Kokille zum Gießen eines Zylinderblockes ebenfalls in schematischer Darstellung.
- Fig. 1
- The drawing shows a mold connected to a riser pipe of a low-pressure mold casting machine for casting a cylinder head in cross section in a schematic representation.
- Fig. 2
- shows in two different partial sections a mold connected to a riser of a low-pressure die casting machine for casting a cylinder block, also in a schematic representation.
In den beiden Figuren ist die in bekannter Weise mehrteilige Kokille mit Kernen nur einstückig dargestellt, um die Übersichtlichkeit der Zeichnung nicht zu beeinträchtigen.In the two figures, the well-known multi-part mold with cores is only shown in one piece in order not to impair the clarity of the drawing.
Die in Fig. 1 im Querschnitt gezeigte Kokille 1 dient zum Gießen eines Zylinderkopfes, der an seiner einen brennraumbegrenzenden Seite und in seinem daran anschließenden Bereich im allgemeinen dickere Wandung als an seiner gegenüberliegenden Seite und in dem daran anschließenden Bereich besitzt. Der Brennraum dieses Zylinderkopfes wird durch die dickeren Wände begrenzt, die in der Kokille von den in Fig. 1 oberen, sich schräg erstreckenden breiteren Formhohlräumen 5 gebildet bzw. umgeben werden. Diese Kokille ist mit mehreren Angußstellen 2 über einen Bodenlauf 3 an das Ende 4 eines Steigrohres einer nicht dargestellten Niederdruckkokillengießmaschine angeschlossen, und zwar so, daß ihre die dickere Wandung des Zylinderkopfes bildenden Formhohlräume 5 oben und ihre die dünnere Wandung des Zylinderkopfes bildenden Formhohlräume 6 unten liegen. Über den Bodenlauf 3 wird das geschmolzene Gießmetall zunächst in die unten liegenden, meist kleineren oder schlankeren Formhohlräume 6 eingeleitet. Durch diese Formhohlräume 6 steigt das eingeleitete Metall im wesentlichen turbulenzfrei und ruhig in der Kokille nach oben in die oberen meist größeren oder dickeren Formhohlräume 5 sowie in die auf die Form aufgesetzten Speiser 7 hinein, die zur Nachspeisung der oberen Formhohlräume 5 zweckmäßig sein können. Die Nachspeisung der unteren Formhohlräume 6 erfolgt über das Steigrohr und den Bodenlauf von der Angußseite her.The mold 1 shown in cross section in FIG. 1 is used to cast a cylinder head which has a thicker wall on its one combustion chamber-delimiting side and in its adjoining area than on its opposite side and in the adjoining area. The combustion chamber of this cylinder head is limited by the thicker walls which are formed or surrounded in the mold by the upper, obliquely extending,
Die in Fig. 2 im Querschnitt gezeigte Kokille 11 dient zum Gießen eines Zylinderblockes, der an seiner den Kurbelwellenraum 18 begrenzenden Seite und in seinen daran anschließenden Bereichen im allgemeinen dünnere Wandung als in seinen darüber befindlichen Bereichen hat. Auch diese Kokille ist mit mehreren Angußstellen 12 über einen Bodenlauf 13 an das Ende 14 eines Steigrohres einer nicht dargestellten Niederdruckkokillen-Gießmaschine angeschlossen, und zwar so, daß ihre die dickere Wandung des Zylinderblockes bildenden Formhohlräume 15 oben und ihre die dünnere Wandung des Zylinderblockes bildenden Formhohlräume 16 unten liegen. Auch hier wird über den Bodenlauf 13 das geschmolzene Gießmetall zunächst in die unten liegenden, meist kleineren oder schlankeren Formhohlräume 16 eingeleitet, durch welche Formhohlräume das Metall im wesentlichen turbulenzfrei und ruhig in der Kokille nach oben in die oberen, meist größeren Formhohlräume 5 sowie in die auf die Form aufgesetzten Speiser 17 hineinsteigt.The
Claims (6)
- Low-pressure die-casting process for casting metal castings, such as cylinder heads or engine blocks for internal combustion engines or the like, which castings have in some areas a predominantly thinner wall than in the remaining areas, and in which process liquid metal is pushed by gas pressure out of a smelting vessel, through a riser and into a mould (1), characterised in that the mould (1) is so arranged that, in the mould, the predominantly thicker wall of the casting being cast remote from the sprue and the predominantly thinner wall being cast close to the sprue, the liquid metal at or near the region of the mould close to the sprue is introduced into the mould cavities (6, 16) forming the predominantly thinner wall.
- Process according to claim 1, characterised in that the liquid metal is advantageously introduced into the mould cavities (6, 16) forming the thinner wall of the casting via a bottom runner (3, 2) supplying the region of the mould (1) lying close to the sprue at a plurality of sprue points.
- Process according to claim 1, characterised in that topping up of liquid metal at several points of the side of the mould (1) remote from the sprue into the mould cavities (5, 15) forming the thicker wall of the casting is effected by feeds (7, 17) mounted on the mould.
- Process for casting cylinder heads according to claim 1, characterised in that the cylinder heads are cast in the mould with their combustion chamber sides facing upwards.
- Process for casting cylinder blocks according to claim 1, characterised in that the cylinder blocks are cast in the mould with the crankshaft chamber facing downwards.
- Process according to claim 1, characterised in that the low-pressure casting furnace is connected to the casting mould for one casting cycle in each case and after setting of the mould inlet cross section(s) is disconnected from the casting mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90101401T ATE88932T1 (en) | 1989-07-26 | 1990-01-24 | LOW-PRESSURE MOLD CASTING PROCESS FOR CASTING METAL CASTINGS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3924742A DE3924742A1 (en) | 1989-07-26 | 1989-07-26 | LOW-PRESSURE CHILLING MOLDING METHOD FOR CASTING METAL CASTING PARTS |
| DE3924742 | 1989-07-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0413885A1 EP0413885A1 (en) | 1991-02-27 |
| EP0413885B1 true EP0413885B1 (en) | 1993-05-05 |
Family
ID=6385893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90101401A Expired - Lifetime EP0413885B1 (en) | 1989-07-26 | 1990-01-24 | Low pressure die casting process for casting non ferrous metal casting parts |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US5381851A (en) |
| EP (1) | EP0413885B1 (en) |
| JP (1) | JPH04506935A (en) |
| KR (1) | KR920700810A (en) |
| AT (1) | ATE88932T1 (en) |
| AU (1) | AU6073990A (en) |
| BR (1) | BR9007555A (en) |
| CA (1) | CA2053867A1 (en) |
| DD (1) | DD295570A5 (en) |
| DE (2) | DE3924742A1 (en) |
| DK (1) | DK0413885T3 (en) |
| ES (1) | ES2040512T3 (en) |
| PT (1) | PT94822A (en) |
| TR (1) | TR24596A (en) |
| WO (1) | WO1991001832A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5310946A (en) * | 1989-09-27 | 1994-05-10 | Rhone-Poulenc Rorer S.A. | Cyclic peroxyacetal lactone, lactol and ether compounds |
| FR2684029B1 (en) * | 1991-11-27 | 1994-03-04 | Creusot Loire Industrie | IMPROVED SUPPORT PLATE OF A HALF SHELL OF MOLDED MASSELOTTE UNDER PRESSURE. |
| DE19520118C2 (en) * | 1995-06-01 | 1999-02-11 | Porsche Ag | Low-pressure casting device, in particular for producing one-piece wheels and rim stars with hollow spokes for motor vehicles |
| DE19803866A1 (en) * | 1998-01-31 | 1999-08-05 | Volkswagen Ag | Casting mold and process for making castings |
| KR20020044028A (en) * | 2000-12-05 | 2002-06-14 | 이계안 | Low pressure die casting for cylinder head of an automobile |
| US6615899B1 (en) * | 2002-07-12 | 2003-09-09 | Honeywell International Inc. | Method of casting a metal article having a thinwall |
| US6857462B2 (en) * | 2002-11-25 | 2005-02-22 | Honda Giken Kogyo Kabushiki Kaisha | High pressure die cast process |
| WO2007123874A2 (en) * | 2006-04-19 | 2007-11-01 | Howmet Corporation | Sequential mold filling |
| US20090065170A1 (en) * | 2007-09-11 | 2009-03-12 | Honda Motor Co., Ltd. | Die cooling apparatus and method thereof |
| DE102011056985A1 (en) * | 2011-12-23 | 2013-06-27 | Martinrea Honsel Germany Gmbh | Casting device for casting cylinder crankcases according to the low-pressure method |
| NO2756167T3 (en) * | 2014-01-29 | 2018-06-16 | ||
| US9352384B2 (en) | 2014-05-27 | 2016-05-31 | Honda Motor Co., Ltd. | Cylinder head casting apparatus and methods |
| DE102014217438A1 (en) * | 2014-09-01 | 2016-03-03 | Volkswagen Aktiengesellschaft | Casting mold for gravity casting or low-pressure casting of light metals and chill casting process executable therewith |
| DE102017100805A1 (en) | 2017-01-17 | 2018-07-19 | Nemak, S.A.B. De C.V. | Casting mold for casting complex shaped castings and use of such a casting mold |
| DE102018211053A1 (en) * | 2018-07-04 | 2020-01-09 | Volkswagen Aktiengesellschaft | Die casting mold and die casting method for producing a die casting component formed with a hollow cylindrical region |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB524677A (en) * | 1939-06-17 | 1940-08-12 | Birmingham Aluminium Casting | Improved apparatus for casting metal articles |
| US2794224A (en) * | 1953-06-08 | 1957-06-04 | Griffin Wheel Co | Method of cooling cast metal preferentially |
| FR2059966A1 (en) * | 1969-08-06 | 1971-06-11 | Peugeot & Renault | |
| JPS5647262A (en) * | 1979-09-25 | 1981-04-28 | Komatsu Ltd | Back pressure casting method |
| JPS5911383B2 (en) * | 1980-09-27 | 1984-03-15 | 橋場鉄工株式会社 | Low-pressure casting mold for tire molding and vulcanization |
| DE3247129A1 (en) * | 1982-12-20 | 1984-06-20 | Institut po Metalosnanie i Technologia na Metalite, Sofija | Casting mould |
| FR2559407B1 (en) * | 1984-02-15 | 1986-09-05 | Pont A Mousson | FOUNDRY MOLDING PROCESS AND MOLD FOR PRECISION CASTING UNDER LOW PRESSURE, WITH GASIFIABLE MODEL AND SAND MOLD WITHOUT BINDER |
| CH662962A5 (en) * | 1984-06-09 | 1987-11-13 | Inst Po Metalloznanie I Tekno | Casting mould for upward casting |
| JPH0783926B2 (en) * | 1987-01-23 | 1995-09-13 | マツダ株式会社 | Casting method |
| US4875518A (en) * | 1987-08-21 | 1989-10-24 | Honda Giken Kogyo Kabushiki Kaisha | Method of and apparatus for low-pressure casting of light metal alloy |
| JPH02241655A (en) * | 1989-03-13 | 1990-09-26 | Honda Motor Co Ltd | Method and apparatus for casting hollow casting |
-
1989
- 1989-07-26 DE DE3924742A patent/DE3924742A1/en not_active Withdrawn
-
1990
- 1990-01-24 ES ES199090101401T patent/ES2040512T3/en not_active Expired - Lifetime
- 1990-01-24 DK DK90101401.9T patent/DK0413885T3/en active
- 1990-01-24 AT AT90101401T patent/ATE88932T1/en not_active IP Right Cessation
- 1990-01-24 DE DE9090101401T patent/DE59001352D1/en not_active Expired - Fee Related
- 1990-01-24 EP EP90101401A patent/EP0413885B1/en not_active Expired - Lifetime
- 1990-07-25 BR BR909007555A patent/BR9007555A/en unknown
- 1990-07-25 KR KR1019910701563A patent/KR920700810A/en not_active Application Discontinuation
- 1990-07-25 DD DD90343059A patent/DD295570A5/en not_active IP Right Cessation
- 1990-07-25 WO PCT/EP1990/001222 patent/WO1991001832A1/en active Application Filing
- 1990-07-25 US US07/768,748 patent/US5381851A/en not_active Expired - Fee Related
- 1990-07-25 JP JP2510685A patent/JPH04506935A/en active Pending
- 1990-07-25 CA CA002053867A patent/CA2053867A1/en not_active Abandoned
- 1990-07-25 AU AU60739/90A patent/AU6073990A/en not_active Abandoned
- 1990-07-26 TR TR90/0721A patent/TR24596A/en unknown
- 1990-07-26 PT PT94822A patent/PT94822A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| AU6073990A (en) | 1991-03-11 |
| DK0413885T3 (en) | 1993-06-01 |
| DE3924742A1 (en) | 1991-01-31 |
| DD295570A5 (en) | 1991-11-07 |
| PT94822A (en) | 1991-03-20 |
| EP0413885A1 (en) | 1991-02-27 |
| CA2053867A1 (en) | 1991-01-27 |
| BR9007555A (en) | 1992-06-23 |
| KR920700810A (en) | 1992-08-10 |
| TR24596A (en) | 1992-01-01 |
| ATE88932T1 (en) | 1993-05-15 |
| JPH04506935A (en) | 1992-12-03 |
| WO1991001832A1 (en) | 1991-02-21 |
| DE59001352D1 (en) | 1993-06-09 |
| US5381851A (en) | 1995-01-17 |
| ES2040512T3 (en) | 1993-10-16 |
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