EP0761345A2 - Hot chamber die casting machine - Google Patents
Hot chamber die casting machine Download PDFInfo
- Publication number
- EP0761345A2 EP0761345A2 EP96113228A EP96113228A EP0761345A2 EP 0761345 A2 EP0761345 A2 EP 0761345A2 EP 96113228 A EP96113228 A EP 96113228A EP 96113228 A EP96113228 A EP 96113228A EP 0761345 A2 EP0761345 A2 EP 0761345A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- hot chamber
- machine according
- die casting
- casting machine
- chamber die
- 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
- 238000004512 die casting Methods 0.000 title claims description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 239000000155 melt Substances 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims description 56
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 23
- 229910052749 magnesium Inorganic materials 0.000 claims description 23
- 239000011777 magnesium Substances 0.000 claims description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 238000011161 development Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 5
- 230000001939 inductive effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2038—Heating, cooling or lubricating the injection unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
- B22D17/04—Plunger machines
Definitions
- the invention relates to a hot chamber die casting machine for processing magnesium melts, with a casting container with a riser tube with a cone-shaped mouthpiece and with a nozzle attached to the mouthpiece, and with a heating device for heating the nozzle and the mouthpiece area of the casting container.
- the casting container and the casting piston of the casting unit are located in the liquid metal. This means that the economy of the hot chamber process is significantly higher than that of the cold chamber process.
- the material magnesium is easy to cast and because of its low weight it is interesting for many applications.
- the processing temperature of magnesium is between 630 ° C and 660 ° C depending on the alloy. Because of this high temperature, it is necessary to provide heating for the nozzle and the casting container in hot chamber die casting machines of the type mentioned at the beginning. It is known to provide gas heating for the nozzle and the casting container attachment for this purpose.
- the present invention is therefore based on the object of proposing a heating system in a hot-chamber die casting machine for processing magnesium melts, with which, on the one hand, simple temperature monitoring is possible and with which the desired high temperatures can be achieved without, however, impairing safety .
- an inductively operating heating device is assigned to the mouthpiece area of the casting container and the nozzle, that all heating devices are operated at medium frequency (a frequency lying at the lower limit of the high frequency) and the Inductors are air-cooled.
- the invention is based on the consideration that even relatively low frequencies are sufficient to generate the necessary heating and that you can get by with a lower cooling capacity, the can be caused by air. The risk of water and magnesium reacting is safely eliminated in this way.
- Due to the inductive heating uniform heating of the nozzle and the casting container attachment can also be achieved in a relatively simple manner and can be carried out in a temperature-controlled manner.
- the operating frequencies for the heating device are in the order of 8 kHz to 15 kHz.
- the inductors can consist of helically wound, externally insulated copper tubes which are supplied with current and through which air flows.
- This configuration enables a relatively simple manufacture of the induction heating.
- an air inlet valve and at the other end an air outlet valve can be arranged, the latter being able to open more or less in a temperature-controlled manner, so that the controlled air cooling of the inductors can also be effected in a relatively simple manner.
- the copper tubes can be wound into sleeve bodies, which can then be pushed onto several cylindrical parts of the device to be heated.
- one of the sleeve bodies can be pushed onto a neck of the casting container which is cylindrical in the region of the mouthpiece, onto the region of the cylindrical nozzle adjoining this casting container region and onto the nozzle in the region of its mouthpiece.
- the sleeve body pushed onto the casting container attachment can project beyond this attachment and at least surround the connection area of the nozzle on the outside.
- a monitoring unit for blooming magnesium oxide can be provided within the sleeve body projecting from the casting container and between it and the nozzle, which is expediently used as a ring with a Contact loop is formed.
- the conical connection area of the nozzle can be provided with an O-ring for sealing in the area of the conical mouthpiece of the casting container, and it is possible to seal the casting container cover from that protruding part of the casting tank, ie So below the cylindrical approach to provide a sealing cord clamped between two flange rings.
- the inductor assigned to the nozzle can also have a conical outer contour, through which magnesium which may possibly splash backwards is inevitably discharged to the outside.
- the inductor running to the mouthpiece area can be provided with an edge overlapping the front end of the inductor seated on the cylindrical extension of the mouthpiece area.
- This edge can be formed in a simple manner by a flange is provided with an annular surface which is inclined towards the front end of the nozzle and towards the cylindrical region of the inductor.
- This ring surface also serves as a repellent surface for any splashing magnesium.
- a ring inductor placed around the casting container can be provided in the region of the crucible cover, which leads to an equalization of the temperature and to a higher process reliability.
- FIG. 1 shows part of a hot chamber die casting machine which is used for processing magnesium.
- the liquid magnesium is at temperatures of approx. 630-680 ° C inside the container (1), which is not shown in detail.
- a pouring container (3) projects into this container (1) through a cover (2) and has a riser bore (4) with a cone-shaped mouthpiece (5).
- the casting container (3) there is also a casting piston, not shown in any more detail, which is guided in a known manner from above into the casting cylinder (7) via the piston rod (6) and fills from the liquid container (1) with the amount of liquid to be poured , before the piston closes the filling opening during its movement and pushes the liquid metal up through the riser hole (4).
- a nozzle (8) is inserted into the mouthpiece (5) of the casting container (3), which extends with its mouthpiece (9) into the sprue area of the mold (10), which is only indicated schematically.
- a sleeve-shaped inductive heating element (12) is now pushed onto the approximately cylindrical extension (11) of the casting container (3).
- Two further sleeve-shaped inductive heating elements (13 and 14) are pushed onto the central area of the nozzle (8) or onto the area of the mouthpiece (9) of the nozzle (8). This can be done by pushing on the sleeve body (12) before the nozzle (8) is assembled, then inserting the nozzle (8) into its conical connection opening (5) and then the two sleeve bodies (13 and 14) be pushed onto the nozzle.
- the sleeve body (12) is placed on the neck (11) so that it projects beyond the front end.
- the sleeve body (12) also projects above a nut (15), which is screwed onto the nozzle (8) for later disassembly, and a monitoring device, which is on the inside of the sleeve body (12) in the form of a ring provided with a contact loop (16) is arranged.
- a mudguard (17) in front of the front end of the sleeve body (12), which is intended to prevent the undesirable penetration of magnesium melt which may splash backwards.
- the monitoring device (16) in the exemplary embodiment serves to detect magnesium efflorescence in the cavity (18) between the sleeve body (12) and the nozzle (8), which is caused, for example, by a leak between the attachment (11) and the nozzle (8) or also due to leaks in the area of the neck (19) of the casting container (3) and due to magnesium thereby reaching in the area within the sleeve body (12).
- Fig. 2 shows that for better sealing between the neck (11) of the casting container (3) and nozzle (8) an O-ring (20) has been applied to the cone area of the nozzle (8).
- a circumferential sealing cord (21) is provided, which is clamped between two flange rings (22 and 23) and thus the required seal between the cover (2) for the molten metal and the neck (19
- the flange ring (22) is firmly welded to the cover (2) .
- the flange ring (23) is made of asbestos-free ceramic material. This ensures that the inductive field is not disturbed otherwise be used optimally.
- FIG. 2 shows that the sleeve bodies (12, 13 and 14), which are designed as inductors, each consist of helically wound and externally insulated copper tubes (24), on which, as in Fig 4 is indicated schematically, both the frequency required for generating the alternating magnetic field is applied via a corresponding generator (25), and air is also applied in the direction of the arrow (26).
- the air supplied in the direction of arrow (26) serves as cooling air for the inductors. It exits via an outlet valve (27) which opens or closes under temperature control. With increasing temperature, which is determined by a sensor, the valve (27) opens more and more, so that when the tubes (24) become too hot during operation, there is a correspondingly better cooling by more air flowing through them.
- Fig. 4 shows that the copper tubes (24) can be easily wrapped around the sleeve bodies (12, 13 and 14).
- the inductors formed in this way which can be air-cooled, are provided with thermal insulation on the outside before being pushed into their corresponding mounting positions.
- the end face of the sleeve body (14) facing the mouthpiece (9) is also provided with a protective plate (28).
- the inductors are supplied from the generator (25) with a kind of medium frequency, ie with a frequency that is in the order of magnitude between 8 kHz and 15 kHz.
- air cooling is possible, which is made possible in particular by the special type of design of the inductors.
- the sleeve bodies (14 and 13) are pulled down from the nozzle (8) after the machine has been switched off. This can be done easily by hand. Subsequently, the sleeve body (12) is pulled down from the shoulder (11), which can also be done by hand, so that the nozzle (8) can then be dismantled in the known manner by actuating the push-off nut (15).
- This configuration also makes it possible, e.g. in the event of a brief standstill of the machine, pull the front sleeve body (14) over the nozzle tip in the retracted state, so that the correct temperature at the nozzle tip is immediately reached when starting the first shot.
- the inductor (14 ') which is pushed onto the area of the mouthpiece (9) of the nozzle (8) and which otherwise has the same structure as that in FIGS 3 and 4 explained inductors, has a conical outer contour (35) which is used to discharge magnesium spraying out between the mouthpiece (9) and the workpiece during the die casting process and from the area of the adjacent inductor (13 ') and the keep inductor (12 ') placed on the mouthpiece (11) of the casting container (3).
- This purpose also serves that the end of the inductor (14 ') facing the casting container and provided with the larger diameter has a protruding, circumferential edge (30) which overlaps a shoulder (31) at the front end of the inductor (13'). This overlap creates a seal between the adjacent inductors, which also reliably prevents magnesium from penetrating into the area between the inductors (13 'and 14') or even into the area between the inductors and the nozzle (8).
- the inductor (13 ') is in turn provided at its end facing the casting container (3) with a flange (36) which is provided with an oblique annular surface (34) towards the cylindrical outer circumference and towards the front end of the nozzle (8) which also serves as a repellent surface for splashing magnesium.
- This flange (36) is provided on the side facing the inductor (12 ') with a circumferential edge (32) which overlaps a recess (33) in the inductor (12'), so that a seal between the inductors also at this point is created.
- a ring inductor (40) is placed around the neck of the casting container (3) above the seal (21).
- This ring inductor (40) can be constructed in the same way as the inductors already described. It is operated at medium frequency.
- the ring inductor (40) can be formed in one piece and is then pushed axially over the neck of the casting container (3). However, it is also possible to construct the ring inductor (40) from two half-shells, each of which is placed on the neck of the casting container from the outside and then connected to one another.
- This ring inductor (40) serves to achieve the most uniform possible temperature distribution on the neck of the casting container (3). This can ensure the safety of the casting process.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Induction Heating (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Die Erfindung betrifft eine Warmkammer-Druckgießmaschine zur Verarbeitung von Magnesium-Schmelzen, mit einem Gießbehälter mit einem Steigrohr mit einem konusartigen Mundstück und mit einer an das Mundstück angesetzten Düse, sowie mit einer Heizeinrichtung zum Beheizen der Düse und des Mündstückbereichs des Gießbehälters.The invention relates to a hot chamber die casting machine for processing magnesium melts, with a casting container with a riser tube with a cone-shaped mouthpiece and with a nozzle attached to the mouthpiece, and with a heating device for heating the nozzle and the mouthpiece area of the casting container.
Beim Warmkammer-Gießverfahren befindet sich der Gießbehälter und der Gießkolben der Gießeinheit im flüssigen Metall. Dadurch ist die Wirtschaftlichkeit des Warmkammerverfahrens bedeutend höher als beim Kaltkammerverfahren.In the hot chamber casting process, the casting container and the casting piston of the casting unit are located in the liquid metal. This means that the economy of the hot chamber process is significantly higher than that of the cold chamber process.
Es ist auch bekannt, daß der Werkstoff Magnesium gut vergießbar ist und durch sein niedriges Gewicht für viele Anwendungsfälle interessant ist. Die Verarbeitungstemperatur von Magnesium liegt jedoch je nach Legierung zwischen 630°C und 660°C. Aufgrund dieser hohen Temperatur wird es notwendig, bei Warmkammer-Druckgießmaschinen der eingangs genannten Art eine Beheizung für die Düse und den Gießbehälter vorzusehen. Es ist bekannt, hierzu eine Gasbeheizung für Düse und Gießbehälteransatz vorzusehen. Dies führt aber zu gewissen Nachteilen. Zum einen liegt eine offene Gasflamme vor, die aus Sicherheitsgründen überwacht werden muß. Es ist auch schwierig, die Düse mit einer gleichbleibenden Temperatur zu beheizen. Dies kann zu einer Verformung, insbesondere zu einer Verbiegung der Düse führen. Durch die Gasflammenbeheizung kann auch eine Entkohlung des sehr teuren Materials von Düse und Gießbehälter auftreten. Es wird daher an der Düse und am Gießbehälter eine Temperaturkontrolle notwendig, um die Lebensdauer der Verschleißteile nicht unnötig zu verkürzen. Insbesondere bei der Verarbeitung von Magnesium sind offene Flammen aus Sicherheitsgründen unerwünscht.It is also known that the material magnesium is easy to cast and because of its low weight it is interesting for many applications. However, the processing temperature of magnesium is between 630 ° C and 660 ° C depending on the alloy. Because of this high temperature, it is necessary to provide heating for the nozzle and the casting container in hot chamber die casting machines of the type mentioned at the beginning. It is known to provide gas heating for the nozzle and the casting container attachment for this purpose. However, this leads to certain disadvantages. Firstly, there is an open gas flame, which must be monitored for safety reasons. It’s also difficult heat the nozzle with a constant temperature. This can lead to deformation, in particular bending of the nozzle. Gas flame heating can also result in decarburization of the very expensive material from the nozzle and casting tank. It is therefore necessary to check the temperature of the nozzle and the casting tank so as not to unnecessarily shorten the life of the wearing parts. For safety reasons, open flames are particularly undesirable when processing magnesium.
Es sind zwar auch schon Beheizungen vorgeschlagen worden, die eine induktive Hochfrequenzbeheizung im Bereich der Düse vorsehen. Auch bei diesen Vorschlägen aber wird der Ansatz des Gießbehälters für die Anordnung der Düse mit Gas beheizt. Bezüglich der dann verwendeten Gasheizung gelten die oben angegebenen Nachteile. Da bei der Hochfrequenzheizung die Induktoren mit Wasser gekühlt werden müssen, besteht auch die Gefahr, daß Wasser und Magnesium in unerwünschter Weise miteinander reagieren.Although heating systems have been proposed which provide inductive high-frequency heating in the area of the nozzle. Even with these proposals, however, the approach of the casting container for the arrangement of the nozzle is heated with gas. With regard to the gas heating then used, the disadvantages stated above apply. Since the inductors must be cooled with water in high-frequency heating, there is also the risk that water and magnesium react with one another in an undesirable manner.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, bei einer Warmkammer-Druckgießmaschine zur Verarbeitung von Magnesium-Schmelzen ein Beheizungssystem vorzuschlagen, mit dem zum einen eine einfache Temperaturüberwachung möglich ist und mit dem die gewünschten hohen Temperaturen erreichbar sind, ohne daß jedoch die Sicherheit beeinträchtigt wird.The present invention is therefore based on the object of proposing a heating system in a hot-chamber die casting machine for processing magnesium melts, with which, on the one hand, simple temperature monitoring is possible and with which the desired high temperatures can be achieved without, however, impairing safety .
Zur Lösung dieser Aufgabe wird bei einer Warmkammer-Druckgießmaschine der eingangs genannten Art vorgesehen, daß dem Mundstücksbereich des Gießbehälters und der Düse eine induktiv arbeitende Heizeinrichtung zugeordnet ist, daß alle Heizeinrichtungen mit Mittelfrequenz (einer an der unteren Grenze der Hochfrequenz liegenden Frequenz) betrieben und die Induktoren luftgekühlt sind. Der Erfindung liegt dabei die Überlegung zugrunde, daß auch verhältnismäßig niedrige Frequenzen zur Erzeugung der notwendigen Aufheizung ausreichend sind und daß man dann mit einer niedrigeren Kühlleistung auskommt, die durch Luft bewirkt werden kann. Die Gefahr, daß Wasser und Magnesium reagieren, wird auf diese Weise sicher ausgeschlossen. Durch die induktive Beheizung läßt sich auch auf verhältnismäßig einfache Weise eine gleichmäßige Erhitzung von Düse und Gießbehälteransatz erreichen und temperaturgesteuert durchführen. Die Betriebsfrequenzen für die Heizeinrichtung liegen dabei in der Größenordnung zwischen 8 kHz und 15 kHz.To solve this problem, it is provided in a hot chamber die casting machine of the type mentioned that an inductively operating heating device is assigned to the mouthpiece area of the casting container and the nozzle, that all heating devices are operated at medium frequency (a frequency lying at the lower limit of the high frequency) and the Inductors are air-cooled. The invention is based on the consideration that even relatively low frequencies are sufficient to generate the necessary heating and that you can get by with a lower cooling capacity, the can be caused by air. The risk of water and magnesium reacting is safely eliminated in this way. Due to the inductive heating, uniform heating of the nozzle and the casting container attachment can also be achieved in a relatively simple manner and can be carried out in a temperature-controlled manner. The operating frequencies for the heating device are in the order of 8 kHz to 15 kHz.
In Weiterbildung der Erfindung können die Induktoren aus wendelförmig gewickelten, außen isolierten Kupferrohren bestehen, die strombeaufschlagt und von Luft durchströmt sind. Diese Ausgestaltung ermöglicht eine relativ einfache Herstellung der Induktionsheizung. An einem Ende der Kupferrohre kann dabei ein Lufteinlaß- und am anderen Ende ein Luftauslaßventil angeordnet sein, wobei das letztere temperaturgesteuert mehr oder weniger öffnen kann, so daß auch auf verhältnismäßig einfache Weise die gesteuerte Luftkühlung der Induktoren bewirkt werden kann.In a further development of the invention, the inductors can consist of helically wound, externally insulated copper tubes which are supplied with current and through which air flows. This configuration enables a relatively simple manufacture of the induction heating. At one end of the copper pipes, an air inlet valve and at the other end an air outlet valve can be arranged, the latter being able to open more or less in a temperature-controlled manner, so that the controlled air cooling of the inductors can also be effected in a relatively simple manner.
In Weiterbildung der Erfindung können die Kupferrohre zu Hülsenkörpern gewickelt sein, die dann zu mehreren jeweils auf zylindrische Teile der zu beheizenden Einrichtung aufgeschoben werden können. So kann in Weiterbildung dieses Gedankens je einer der Hülsenkörper auf einen im Bereich des Mundstückes zylindrischen Ansatz des Gießbehälters, auf den an diesem Gießbehälterbereich angrenzenden Bereich der zylindrischen Düse und auf die Düse im Bereich ihres Mundstückes aufgeschoben sein.In a further development of the invention, the copper tubes can be wound into sleeve bodies, which can then be pushed onto several cylindrical parts of the device to be heated. In a further development of this idea, one of the sleeve bodies can be pushed onto a neck of the casting container which is cylindrical in the region of the mouthpiece, onto the region of the cylindrical nozzle adjoining this casting container region and onto the nozzle in the region of its mouthpiece.
In Weiterbildung der Erfindung kann dabei der auf den Gießbehälteransatz aufgeschobene Hülsenkörper diesen Ansatz nach außen überragen und zumindest den Anschlußbereich der Düse außen umgeben. Um dennoch jede Undichtheit feststellen zu können, kann in Weiterbildung der Erfindung innerhalb des vom Gießbehälter abragenden Hülsenkörpers und zwischen diesem und der Düse eine Überwachungseinheit für ausblühendes Magnesiumoxid vorgesehen sein, die zweckmäßig als ein Ring mit einer Kontaktschleife ausgebildet ist. Obwohl daher vom Gießbehälter ab bis zum Düsenmundstück eine durchgehende Beheizung vorgesehen ist, wird die Gefahr weitgehend ausgeschlossen, daß Undichtheiten bei der Düsenmontage nicht bemerkt werden und Magnesium austritt.In a further development of the invention, the sleeve body pushed onto the casting container attachment can project beyond this attachment and at least surround the connection area of the nozzle on the outside. In order to be able to detect any leakage, a monitoring unit for blooming magnesium oxide can be provided within the sleeve body projecting from the casting container and between it and the nozzle, which is expediently used as a ring with a Contact loop is formed. Although continuous heating is therefore provided from the casting container to the nozzle mouthpiece, the risk is largely ruled out that leaks are not noticed during nozzle assembly and magnesium escapes.
Um die Abdichtung aber so gut wie möglich zu machen, kann in Weiterbildung der Erfindung der konische Anschlußbereich der Düse mit einem O-Ring zur Abdichtung im Bereich des konischen Mundstückes des Gießbehälters versehen sein und es ist möglich, zur Abdichtung der Gießbehälterabdeckung gegenüber dem aus dieser herausragenden Teil des Gießbehälters, d.h. also unterhalb des zylindrischen Ansatzes, eine zwischen zwei Flanschringen eingespannte Dichtschnur vorzusehen. Diese Maßnahmen tragen mit zur Sicherheit der nun induktiv beheizten Gießeinheit bei.In order to make the seal as good as possible, in a further development of the invention the conical connection area of the nozzle can be provided with an O-ring for sealing in the area of the conical mouthpiece of the casting container, and it is possible to seal the casting container cover from that protruding part of the casting tank, ie So below the cylindrical approach to provide a sealing cord clamped between two flange rings. These measures contribute to the safety of the now inductively heated casting unit.
Um das Eindringen von eventuell beim Gußvorgang abspritzenden Magnesium in den Bereich der Induktoren zu verhindern, kann in Weiterbildung der Erfindung vorgesehen sein, daß mindestens der der Düse zugeordnete Induktor an seinem zum Gießbehälter hingewandten Ende mit einem das vordere Ende des zum Mundstücksbereich verlaufende Induktors überlappenden Rand versehen ist. Durch diese Maßnahme kann das Eindringen von eventuell beim Druckgußvorgang nach hinten spritzendem Magnesium in den Bereich zwischen bzw. unter die Induktoren sicher vermieden werden. In Weiterbildung des Gedankens der vorliegenden Erfindung kann der der Düse zugeordnete Induktor auch eine konische Außenkontur aufweisen, durch die von vorneherein eventuell nach hinten spritzendes Magnesium zwangsläufig nach außen abgeleitet wird.In order to prevent the penetration of magnesium, which may spray off during the casting process, into the area of the inductors, it can be provided in a further development of the invention that at least the inductor associated with the nozzle at its end facing the casting container has an edge overlapping the front end of the inductor running to the mouthpiece area is provided. This measure reliably prevents the penetration of magnesium, which may spray backwards during the die casting process, into the area between or under the inductors. In a further development of the idea of the present invention, the inductor assigned to the nozzle can also have a conical outer contour, through which magnesium which may possibly splash backwards is inevitably discharged to the outside.
In Weiterbildung der Erfindung kann der zum Mundstücksbereich verlaufende Induktor mit einem das vordere Ende des auf dem zylindrischen Ansatz des Mundstückbereiches sitzenden Induktors überlappenden Rand versehen werden. Dieser Rand kann dabei in einfacher Weise von einem Flansch gebildet sein, der mit einer in Richtung zum vorderen Ende der Düse und zum zylindrischen Bereich des Induktors hin schräg verlaufenden Ringfläche versehen ist. Diese Ringfläche dient ebenfalls als eine Abweisfläche für eventuelles spritzendes Magnesium.In a further development of the invention, the inductor running to the mouthpiece area can be provided with an edge overlapping the front end of the inductor seated on the cylindrical extension of the mouthpiece area. This edge can be formed in a simple manner by a flange is provided with an annular surface which is inclined towards the front end of the nozzle and towards the cylindrical region of the inductor. This ring surface also serves as a repellent surface for any splashing magnesium.
In einer weiteren vorteilhaften Weiterbildung des Gegenstandes des Hauptpatentes kann im Bereich der Tiegelabdeckung ein um den Gießbehälter gelegter Ringinduktor vorgesehen sein, der zu einer Vergleichmäßigung der Temperatur und zu einer höheren Verfahrenssicherheit führt.In a further advantageous development of the subject matter of the main patent, a ring inductor placed around the casting container can be provided in the region of the crucible cover, which leads to an equalization of the temperature and to a higher process reliability.
Die Erfindung ist anhand von Ausführungsbeispielen in der Zeichnung dargestellt und wird im folgenden erläutert. Es zeigen:
- Fig. 1
- eine schematische Schnittdarstellung des Austrittsbereiches einer Warmkammer-Druckgießmaschine nach der Erfindung,
- Fig. 2
- die vergrößerte Darstellung des Bereiches der eingesetzten und abgedichteten Düse mit der erfindungsgemäßen Beheizung,
- Fig. 3
- eine schematische Stirnansicht der dem Ansetzbereich der Düse und des Gießbehälters zugeordneten Beheizungseinrichtung,
- Fig. 4
- eine schematische perspektivische Darstellung des Aufbaues der zur Beheizung vorgesehenen Induktoren,
- Fig. 5
- eine vergrößerte Darstellung des Bereiches der eingesetzten und abgedichteten Düse mit der erfindungsgemäßen Beheizung ähnlich Fig. 2 und
- Fig. 6
- den Bereich der Tiegelabdeckung mit einem um den Gießbehälter gelegten zusätzlichen Ringinduktor.
- Fig. 1
- 2 shows a schematic sectional illustration of the outlet area of a hot chamber die casting machine according to the invention,
- Fig. 2
- the enlarged representation of the area of the inserted and sealed nozzle with the heating according to the invention,
- Fig. 3
- 2 shows a schematic end view of the heating device assigned to the attachment area of the nozzle and the casting container,
- Fig. 4
- 2 shows a schematic perspective illustration of the structure of the inductors provided for heating,
- Fig. 5
- an enlarged view of the area of the inserted and sealed nozzle with the inventive heating similar to Fig. 2 and
- Fig. 6
- the area of the crucible cover with an additional ring inductor placed around the casting container.
In der Fig. 1 ist ein Teil einer Warmkammer-Druckgießmaschine gezeigt, die zur Verarbeitung von Magnesium eingesetzt wird. Das flüssige Magnesium befindet sich dabei bei Temperaturen von ca. 630-680°C innerhalb des nicht näher gezeigten Behälters (1). In diesen Behälter (1) ragt durch eine Abdeckung (2) ein Gießbehälter (3) herein, der eine Steigbohrung (4) mit einem konusartig ausgebildeten Mundstück (5) besitzt. Im Gießbehälter (3) befindet sich außerdem auch ein nicht näher gezeigter Gießkolben, der über die Kolbenstange (6) in bekannter Weise von oben in den Gießzylinder (7) hereingeführt wird, der sich aus dem Flüssigkeitsbehälter (1) mit der zu vergießenden Flüssigkeitsmenge füllt, ehe der Kolben die Einfüllöffnung bei seiner Bewegung abschließt und das flüssige Metall durch die Steigbohrung (4) nach oben drückt.1 shows part of a hot chamber die casting machine which is used for processing magnesium. The liquid magnesium is at temperatures of approx. 630-680 ° C inside the container (1), which is not shown in detail. A pouring container (3) projects into this container (1) through a cover (2) and has a riser bore (4) with a cone-shaped mouthpiece (5). In the casting container (3) there is also a casting piston, not shown in any more detail, which is guided in a known manner from above into the casting cylinder (7) via the piston rod (6) and fills from the liquid container (1) with the amount of liquid to be poured , before the piston closes the filling opening during its movement and pushes the liquid metal up through the riser hole (4).
In das Mundstück (5) des Gießbehälters (3) eingesetzt ist eine Düse (8), die mit ihrem Mundstück (9) bis in den Angußbereich der Form (10) reicht, die nur schematisch angedeutet ist.A nozzle (8) is inserted into the mouthpiece (5) of the casting container (3), which extends with its mouthpiece (9) into the sprue area of the mold (10), which is only indicated schematically.
Gemäß der Erfindung ist nun auf den in etwa zylindrischen Ansatz (11) des Gießbehälters (3) ein hülsenförmiger induktiver Heizkörper (12) aufgeschoben. Zwei weitere hülsenförmige induktive Heizkörper (13 und 14) sind auf den mittleren Bereich der Düse (8) bzw. auf den Bereich des Mundstückes (9) der Düse (8) aufgeschoben. Dabei kann dies dadurch geschehen, daß der Hülsenkörper (12) noch vor der Montage der Düse (8) aufgeschoben wird, daß dann die Düse (8) in ihre konusartige Anschlußöffnung (5) eingesetzt wird und dann die beiden Hülsenkörper (13 und 14) auf die Düse aufgeschoben werden. Eine gesonderte Befestigung ist nicht notwendig, weil die Hülsenkörper (13 und 14) wegen der leichten Schrägstellung der Düse (8) von selbst gehalten werden und der Hülsenkörper (12) auf dem ebenfalls leicht schrägen Ansatz (11) auch ohne gesonderte Befestigungsmittel hält. Alle Heizkörper (12, 13, 14) können, da eine Befestigung fehlt, sehr leicht von Hand verschoben werden, um auf diese Weise die optimale Temperatur in den entsprechenden Bereichen zu erhalten.According to the invention, a sleeve-shaped inductive heating element (12) is now pushed onto the approximately cylindrical extension (11) of the casting container (3). Two further sleeve-shaped inductive heating elements (13 and 14) are pushed onto the central area of the nozzle (8) or onto the area of the mouthpiece (9) of the nozzle (8). This can be done by pushing on the sleeve body (12) before the nozzle (8) is assembled, then inserting the nozzle (8) into its conical connection opening (5) and then the two sleeve bodies (13 and 14) be pushed onto the nozzle. A separate attachment is not necessary because the sleeve bodies (13 and 14) are held by themselves due to the slight inclination of the nozzle (8) and the sleeve body (12) holds on the slightly inclined attachment (11) even without separate attachment means. All radiators (12, 13, 14) can be moved very easily by hand because there is no attachment in order to maintain the optimal temperature in the corresponding areas.
Der Hülsenkörper (12) ist so auf den Ansatz (11) aufgesetzt, daß er dessen Stirnende nach außen überragt. Der Hülsenkörper (12) überragt dabei auch eine Mutter (15), die zur späteren Demontage der Düse (8) auf diese aufgeschraubt ist, sowie eine Überwachungseinrichtung, die an der Innenseite des Hülsenkörpers (12) in der Form eines mit einer Kontaktschleife versehenen Ringes (16) angeordnet ist. Zum Mundstück (9) der Düse (8) hin liegt vor dem Stirnende des Hülsenkörpers (12) ein Schutzblech (17), das unerwünschtes Eindringen von eventuell nach hinten spritzender Magnesiumschmelze verhindern soll.The sleeve body (12) is placed on the neck (11) so that it projects beyond the front end. The sleeve body (12) also projects above a nut (15), which is screwed onto the nozzle (8) for later disassembly, and a monitoring device, which is on the inside of the sleeve body (12) in the form of a ring provided with a contact loop (16) is arranged. Towards the mouthpiece (9) of the nozzle (8) there is a mudguard (17) in front of the front end of the sleeve body (12), which is intended to prevent the undesirable penetration of magnesium melt which may splash backwards.
Die Überwachungseinrichtung (16) dient beim Ausführungsbeispiel dazu, Magnesiumausblühungen in dem Hohlraum (18) zwischen dem Hülsenkörper (12) und der Düse (8) zu erfassen, die beispielsweise durch eine Undichtheit zwischen dem Ansatz (11) und der Düse (8) oder auch durch Undichtheiten im Bereich des Halses (19) des Gießbehälters (3) und durch dadurch in dem Bereich innerhalb des Hülsenkörpers (12) gelangendes Magnesium auftreten könnten.The monitoring device (16) in the exemplary embodiment serves to detect magnesium efflorescence in the cavity (18) between the sleeve body (12) and the nozzle (8), which is caused, for example, by a leak between the attachment (11) and the nozzle (8) or also due to leaks in the area of the neck (19) of the casting container (3) and due to magnesium thereby reaching in the area within the sleeve body (12).
Fig. 2 zeigt, daß man zur besseren Abdichtung zwischen Ansatz (11) des Gießbehälters (3) und Düse (8) einen O-Ring (20) auf den Konusbereich der Düse (8) aufgebracht hat. Im Bereich des Halses (19 des Gießbehälters (3) ist eine umlaufende Dichtschnur (21) vorgesehen, die zwischen zwei Flanschringen (22 und 23) eingespannt ist und so die erforderliche Abdichtung zwischen der Abdeckung (2) für die Metallschmelze und dem Hals (19) des Gießbehälters (3) bewirkt. Der Flanschring (22) ist dabei fest mit der Abdeckung (2) verschweißt. Der Flanschring (23) besteht aus asbestfreiem keramischen Material. Dadurch wird erreicht, daß das induktive Feld nicht gestört wird. Die Heizwirkung kann sonst optimal ausgenutzt werden.Fig. 2 shows that for better sealing between the neck (11) of the casting container (3) and nozzle (8) an O-ring (20) has been applied to the cone area of the nozzle (8). In the area of the neck (19 of the casting container (3), a circumferential sealing cord (21) is provided, which is clamped between two flange rings (22 and 23) and thus the required seal between the cover (2) for the molten metal and the neck (19 The flange ring (22) is firmly welded to the cover (2) .The flange ring (23) is made of asbestos-free ceramic material. This ensures that the inductive field is not disturbed otherwise be used optimally.
Die Fig. 3 und 4 lassen zusammen mit Fig. 2 erkennen, daß die Hülsenkörper (12, 13 und 14), die als Induktoren ausgebildet sind, jeweils aus wendelförmig gewickelten und außen isolierten Kupferrohren (24) bestehen, an denen, wie in Fig. 4 schematisch angedeutet ist, sowohl die notwendige Frequenz zur Erzeugung des Wechselmagnetfeldes über einen entsprechenden Generator (25) angelegt ist, als auch eine Beaufschlagung mit Luft im Sinne des Pfeiles (26) erfolgt. Die im Sinn des Pfeiles (26) zugeführte Luft dient als Kühlluft für die Induktoren. Sie tritt über ein Auslaßventil (27) wieder aus, das temperaturgesteuert öffnet oder schließt. Mit höher werdender Temperatur, die durch einen Sensor ermittelt wird, öffnet das Ventil (27) immer mehr, so daß dann, wenn die Rohre (24) im Betrieb zu heiß werden, eine entsprechende bessere Kühlung durch mehr durchströmende Luft erfolgt.3 and 4 together with FIG. 2 show that the sleeve bodies (12, 13 and 14), which are designed as inductors, each consist of helically wound and externally insulated copper tubes (24), on which, as in Fig 4 is indicated schematically, both the frequency required for generating the alternating magnetic field is applied via a corresponding generator (25), and air is also applied in the direction of the arrow (26). The air supplied in the direction of arrow (26) serves as cooling air for the inductors. It exits via an outlet valve (27) which opens or closes under temperature control. With increasing temperature, which is determined by a sensor, the valve (27) opens more and more, so that when the tubes (24) become too hot during operation, there is a correspondingly better cooling by more air flowing through them.
Die Fig. 4 zeigt, daß sich die Kupferrohre (24) in einfacher Weise zu den Hülsenkörpern (12, 13 und 14) wickeln lassen. Natürlich werden die so gebildeten Induktoren, die luftgekühlt werden können, außen noch mit einer Wärmeisolierung versehen, ehe sie in ihre entsprechenden Montagestellungen geschoben werden.Fig. 4 shows that the copper tubes (24) can be easily wrapped around the sleeve bodies (12, 13 and 14). Of course, the inductors formed in this way, which can be air-cooled, are provided with thermal insulation on the outside before being pushed into their corresponding mounting positions.
Das dem Mundstück (9) zugewandte Stirnende des Hülsenkörpers (14) ist ebenfalls mit einem Schutzblech (28) versehen. Die Induktoren werden vom Generator (25) aus mit einer Art Mittelfrequenz versorgt, d.h. mit einer Frequenz, die in der Größenordnung zwischen 8 kHz und 15 kHz liegt. Beim Betrieb der Induktoren mit einer solchen Frequenz ist Luftkühlung möglich, die insbesondere auch durch die besondere Art der Ausbildung der Induktoren ermöglicht wird. Druch diese Maßnahmen besteht keine Gefahr, daß Kühlwasser mit etwa austretendem Magnesium in Berührung kommen kann. Eine Reaktion zwischen Magnesium und Wasser wird daher ausgeschlossen. Die Anordnung der Überwachungseinrichtung (16) wiederum sorgt dafür, daß der an sich im Betrieb nicht einsichtige Hohlraum (18) sicher überwacht werden kann.The end face of the sleeve body (14) facing the mouthpiece (9) is also provided with a protective plate (28). The inductors are supplied from the generator (25) with a kind of medium frequency, ie with a frequency that is in the order of magnitude between 8 kHz and 15 kHz. When the inductors are operated at such a frequency, air cooling is possible, which is made possible in particular by the special type of design of the inductors. These measures mean that there is no danger that cooling water can come into contact with any magnesium that may escape. A reaction between magnesium and water is therefore excluded. The arrangement of the monitoring device (16) in turn ensures that the cavity (18), which is not per se perceptible during operation, can be monitored safely.
Zum Abbau der Düse (8) werden die Hülsenkörper (14 und 13) nach dem Abschalten der Maschine nach vorne von der Düse (8) heruntergezogen. Dies ist in einfacher Weise von Hand möglich. Anschließend wird der Hülsenkörper (12) vom Ansatz (11) heruntergezogen, was auch von Hand geschehen kann, so daß dann die Demontage der Düse (8) in der bekannten Weise durch die Betätigung der Abdrückmutter (15) erfolgen kann. Durch diese Ausgestaltung wird es aber auch möglich, z.B. bei einem kurzen Stillstand der Maschine den vorderen Hülsenkörper (14) im abgefahrenen Zustand über die Düsenspitze zu ziehen, so daß dann beim Start sofort ab dem ersten Schuß wieder die richtige Temperatur an der Düsenspitze erreicht wird.To dismantle the nozzle (8), the sleeve bodies (14 and 13) are pulled down from the nozzle (8) after the machine has been switched off. This can be done easily by hand. Subsequently, the sleeve body (12) is pulled down from the shoulder (11), which can also be done by hand, so that the nozzle (8) can then be dismantled in the known manner by actuating the push-off nut (15). This configuration also makes it possible, e.g. in the event of a brief standstill of the machine, pull the front sleeve body (14) over the nozzle tip in the retracted state, so that the correct temperature at the nozzle tip is immediately reached when starting the first shot.
Unterschiedlich zu der Ausgestaltung nach den Fig. 1 und 2 ist nach Fig. 5, daß der auf den Bereich des Mundstückes (9) der Düse (8) aufgeschobene Induktor (14'), der im übrigen den gleichen Aufbau besitzt wie die in den Fig. 3 und 4 erläuterten Induktoren, eine konische Außenkontur (35) besitzt, die dazu dient, beim Druckgußvorgang eventuell zwischen dem Mundstück (9) und dem Werkstück abspritzendes Magnesium nach außen abzuleiten und von dem Bereich des benachbarten Induktors (13') und des auf das Mundstück (11) des Gießbehälters (3) aufgesetzten Induktor (12') fernzuhalten. Diesem Zweck dient auch, daß das dem Gießbehälter zugewandte, mit dem größeren Durchmesser versehene Ende des Induktors (14') einen überstehenden, umlaufenden Rand (30) aufweist, der einen Absatz (31) am vorderen Ende des Induktors (13') überlappt. Durch diese Überlappung wird eine Abdichtung zwischen den aneinandergrenzenden Induktoren geschaffen, die ebenfalls sicher verhindert, daß Magnesium in den Bereich zwischen den Induktoren (13' und 14') oder gar in den Bereich zwischen die Induktoren und der Düse (8) eindringen kann.Different from the embodiment according to FIGS. 1 and 2 is according to FIG. 5 that the inductor (14 ') which is pushed onto the area of the mouthpiece (9) of the nozzle (8) and which otherwise has the same structure as that in FIGS 3 and 4 explained inductors, has a conical outer contour (35) which is used to discharge magnesium spraying out between the mouthpiece (9) and the workpiece during the die casting process and from the area of the adjacent inductor (13 ') and the keep inductor (12 ') placed on the mouthpiece (11) of the casting container (3). This purpose also serves that the end of the inductor (14 ') facing the casting container and provided with the larger diameter has a protruding, circumferential edge (30) which overlaps a shoulder (31) at the front end of the inductor (13'). This overlap creates a seal between the adjacent inductors, which also reliably prevents magnesium from penetrating into the area between the inductors (13 'and 14') or even into the area between the inductors and the nozzle (8).
Der Induktor (13') wiederum ist an seinem dem Gießbehälter (3) zugewandten Ende mit einem Flansch (36) versehen, der zum zylindrischen Außenumfang und zum vorderen Ende der Düse (8) hin mit einer schräg verlaufenden Ringfläche (34) versehen ist, die auch als Abweisfläche für etwa spritzendes Magnesium dient. Dieser Flansch (36) ist auf der dem Induktor (12') zugewandten Seite mit einem umlaufenden Rand (32) versehen, der eine Aussparung (33) des Induktors (12') überlappt, so daß auch an dieser Stelle eine Abdichtung zwischen den Induktoren geschaffen ist.The inductor (13 ') is in turn provided at its end facing the casting container (3) with a flange (36) which is provided with an oblique annular surface (34) towards the cylindrical outer circumference and towards the front end of the nozzle (8) which also serves as a repellent surface for splashing magnesium. This flange (36) is provided on the side facing the inductor (12 ') with a circumferential edge (32) which overlaps a recess (33) in the inductor (12'), so that a seal between the inductors also at this point is created.
Im übrigen entspricht der Aufbau der Warmkammer-Druckgießmaschine nach Fig. 5 dem Aufbau der in der Fig. 2 beschriebenen Druckgießmaschine.5 corresponds to the structure of the die casting machine described in FIG. 2.
Bei der Ausführungsform der Fig. 6 ist im Bereich der Abdeckung (2) des Behälters (1) für die Schmelze ein Ringinduktor (40) oberhalb der Abdichtung (21) um den Hals des Gießbehälters (3) herumgelegt. Dieser Ringinduktor (40) kann ebenso aufgebaut sein, wie die schon beschriebenen Induktoren. Er wird mit Mittelfrequenz betrieben.In the embodiment of FIG. 6, in the area of the cover (2) of the container (1) for the melt, a ring inductor (40) is placed around the neck of the casting container (3) above the seal (21). This ring inductor (40) can be constructed in the same way as the inductors already described. It is operated at medium frequency.
Der Ringinduktor (40) kann einteilig ausgebildet sein und wird dann axial über den Hals des Gießbehälters (3) geschoben. Es ist aber auch möglich, den Ringinduktor (40) aus zwei Halbschalen aufzubauen, die jeweils von außen auf den Hals des Gießbehälters aufgesteckt und dann untereinander verbunden werden.The ring inductor (40) can be formed in one piece and is then pushed axially over the neck of the casting container (3). However, it is also possible to construct the ring inductor (40) from two half-shells, each of which is placed on the neck of the casting container from the outside and then connected to one another.
Dieser Ringinduktor (40) dient dazu, eine möglichst gleichmäßige Temperaturverteilung am Hals des Gießbehälters (3) zu erreichen. Die Sicherheit des Gießverfahrens kann dadurch gewährleistet werden.This ring inductor (40) serves to achieve the most uniform possible temperature distribution on the neck of the casting container (3). This can ensure the safety of the casting process.
Claims (21)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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DE19531161 | 1995-08-24 | ||
DE19531161A DE19531161C2 (en) | 1995-08-24 | 1995-08-24 | Hot chamber die casting machine |
DE19543805 | 1995-11-24 | ||
DE19543805A DE19543805A1 (en) | 1995-08-24 | 1995-11-24 | Hot chamber die casting machine |
Publications (3)
Publication Number | Publication Date |
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EP0761345A2 true EP0761345A2 (en) | 1997-03-12 |
EP0761345A3 EP0761345A3 (en) | 1998-09-02 |
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EP96113228A Expired - Lifetime EP0761345B1 (en) | 1995-08-24 | 1996-08-17 | Hot chamber die casting machine |
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US (1) | US5960854A (en) |
EP (1) | EP0761345B1 (en) |
JP (1) | JPH09122868A (en) |
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DE (1) | DE19531161C2 (en) |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19853189C1 (en) * | 1998-11-18 | 2000-04-13 | Frech Oskar Gmbh & Co | Hot chamber die casting machine has a ring inductor consisting of a bent pipe made of elastic material forming a one-part ring open at one point with connections for energy and for flowing cooling air |
FR2789612A1 (en) * | 1999-02-12 | 2000-08-18 | Gilles Curti | Injection molding of a metallic material using hot chamber machine involves back flow of metal melt in conduit towards crucible after onset of cooling |
EP1354650A1 (en) * | 2002-04-19 | 2003-10-22 | Salvatore Bonvegna | Nozzle for die-casting apparatus |
EP1825939A3 (en) * | 2006-02-24 | 2007-12-26 | Oskar Frech GmbH + Co. KG | Heatable dosage device for a warm chamber die casting machine |
WO2013071926A3 (en) * | 2011-11-15 | 2014-09-04 | Ferrofacta Gmbh | Diecasting nozzle and method for operating a diecasting nozzle |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19829191A1 (en) * | 1998-06-30 | 2000-01-05 | Be Automation Giesereitechnik | Pressure casting unit with shorter preliminary melt runs |
WO2000047352A1 (en) | 1999-02-10 | 2000-08-17 | Ju-Oh Inc. | Metal mold of hot runner type injection molding machine and method of manufacturing the metal mold |
ES2205643T3 (en) * | 1999-04-13 | 2004-05-01 | OSKAR FRECH GMBH & CO. | HOT CAMERA PRESSURE COLADA MACHINE. |
AU723887B3 (en) * | 2000-07-07 | 2000-09-07 | Liken Lin | Melting furnace of a die-casting machine |
US6463694B1 (en) | 2000-10-06 | 2002-10-15 | Edward Manciet | Closed pesticide delivery and recovery system |
ATE327849T1 (en) * | 2000-10-31 | 2006-06-15 | Frech Oskar Gmbh & Co Kg | DEVICE FOR PRODUCING METAL DIE-CAST PARTS, PARTICULARLY FROM NON-FERROUS METALS |
DE60325648D1 (en) * | 2003-02-13 | 2009-02-12 | Techmire Ltd | die casting machine |
ATE485178T1 (en) | 2004-03-26 | 2010-11-15 | Continental Reifen Deutschland | VEHICLE Pneumatic Tires |
US7341094B2 (en) * | 2005-05-02 | 2008-03-11 | Husky Injection Molding Systems Ltd. | Metallic alloy slurry dispenser |
US20090000758A1 (en) | 2007-04-06 | 2009-01-01 | Ashley Stone | Device for Casting |
KR101030223B1 (en) * | 2009-01-23 | 2011-04-22 | 김경탁 | The diecasting apparatus to provide electrode terminal |
DE102011050149A1 (en) * | 2010-11-17 | 2012-05-24 | Ferrofacta Gmbh | Die casting nozzle and die casting process |
ITMI20120950A1 (en) * | 2012-06-01 | 2013-12-02 | Flavio Mancini | METHOD AND PLANT TO OBTAIN DIE-CASTING JETS IN LIGHT ALLOYS WITH NON-METALLIC SOURCES |
US9925583B2 (en) | 2013-07-11 | 2018-03-27 | Crucible Intellectual Property, Llc | Manifold collar for distributing fluid through a cold crucible |
FR3044943B1 (en) * | 2015-12-11 | 2020-12-04 | Adm28 S Ar L | INJECTION TIP FOR A CASTING MACHINE, MACHINE AND CASTING PROCESS USING SUCH A TIP |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1164034B (en) * | 1962-08-04 | 1964-02-27 | Eckert G M B H Geb | Die-casting device with height-adjustable pouring nozzle |
DE2141551A1 (en) * | 1970-08-24 | 1972-04-20 | The Dow Chemical Co., Midland, Mich. (V.StA.) | Injection casting nozzle - air - cooled with temp control system |
DE2425067A1 (en) * | 1974-05-24 | 1975-12-04 | Idra Pressen Gmbh | Dosing unit for delivering molten metal, esp. magnesium - to hot-chamber pressure die casting machines |
EP0662361A1 (en) * | 1993-12-13 | 1995-07-12 | Hitachi Metals, Ltd. | Die casting method and die casting machine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR438781A (en) * | 1911-01-12 | 1912-05-28 | United Shoe Machinery Co Fr | Improvements in nailing machines used in shoemaking |
US2004959A (en) * | 1933-12-07 | 1935-06-18 | Whitehall Patents Corp | Method of manufacturing fastener stringers |
US2520348A (en) * | 1947-12-05 | 1950-08-29 | Ajax Engineering Corp | Discharging apparatus |
DE1878490U (en) * | 1963-01-03 | 1963-08-29 | Ewald Schulte | DIE CASTING MACHINE FOR PROCESSING ZINC OR SIMILAR METAL ALLOYS. |
JPS5012050B1 (en) * | 1970-08-20 | 1975-05-08 | ||
NL7115392A (en) * | 1970-11-12 | 1972-05-16 | ||
US4219068A (en) * | 1979-05-30 | 1980-08-26 | Dynacast International Limited | Die casting machine |
DE4005129A1 (en) * | 1990-02-17 | 1991-08-22 | Degussa | High-frequency induction heater - has ferrite annular core and winding which produces eddy currents at frequency of power-MOSFET switched resonant DC-AC converter |
-
1995
- 1995-08-24 DE DE19531161A patent/DE19531161C2/en not_active Expired - Fee Related
-
1996
- 1996-08-17 ES ES96113228T patent/ES2144177T3/en not_active Expired - Lifetime
- 1996-08-17 AT AT96113228T patent/ATE190532T1/en active
- 1996-08-17 EP EP96113228A patent/EP0761345B1/en not_active Expired - Lifetime
- 1996-08-21 JP JP8219993A patent/JPH09122868A/en active Pending
- 1996-08-26 US US08/703,127 patent/US5960854A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1164034B (en) * | 1962-08-04 | 1964-02-27 | Eckert G M B H Geb | Die-casting device with height-adjustable pouring nozzle |
DE2141551A1 (en) * | 1970-08-24 | 1972-04-20 | The Dow Chemical Co., Midland, Mich. (V.StA.) | Injection casting nozzle - air - cooled with temp control system |
DE2425067A1 (en) * | 1974-05-24 | 1975-12-04 | Idra Pressen Gmbh | Dosing unit for delivering molten metal, esp. magnesium - to hot-chamber pressure die casting machines |
EP0662361A1 (en) * | 1993-12-13 | 1995-07-12 | Hitachi Metals, Ltd. | Die casting method and die casting machine |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19853189C1 (en) * | 1998-11-18 | 2000-04-13 | Frech Oskar Gmbh & Co | Hot chamber die casting machine has a ring inductor consisting of a bent pipe made of elastic material forming a one-part ring open at one point with connections for energy and for flowing cooling air |
US6435260B1 (en) | 1998-11-18 | 2002-08-20 | Oskar Frech Gmbh & Co. | Hot-chamber diecasting machine |
FR2789612A1 (en) * | 1999-02-12 | 2000-08-18 | Gilles Curti | Injection molding of a metallic material using hot chamber machine involves back flow of metal melt in conduit towards crucible after onset of cooling |
EP1354650A1 (en) * | 2002-04-19 | 2003-10-22 | Salvatore Bonvegna | Nozzle for die-casting apparatus |
EP1825939A3 (en) * | 2006-02-24 | 2007-12-26 | Oskar Frech GmbH + Co. KG | Heatable dosage device for a warm chamber die casting machine |
WO2013071926A3 (en) * | 2011-11-15 | 2014-09-04 | Ferrofacta Gmbh | Diecasting nozzle and method for operating a diecasting nozzle |
US9561540B2 (en) | 2011-11-15 | 2017-02-07 | Ferrofacta Gmbh | Die casting nozzle and method for operating a die casting nozzle |
Also Published As
Publication number | Publication date |
---|---|
JPH09122868A (en) | 1997-05-13 |
EP0761345A3 (en) | 1998-09-02 |
DE19531161C2 (en) | 1999-05-20 |
ES2144177T3 (en) | 2000-06-01 |
DE19531161A1 (en) | 1997-02-27 |
US5960854A (en) | 1999-10-05 |
ATE190532T1 (en) | 2000-04-15 |
EP0761345B1 (en) | 2000-03-15 |
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