EP0400274B1 - Gooseneck for hot chamber-type die-casting machines - Google Patents
Gooseneck for hot chamber-type die-casting machines Download PDFInfo
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- EP0400274B1 EP0400274B1 EP90103944A EP90103944A EP0400274B1 EP 0400274 B1 EP0400274 B1 EP 0400274B1 EP 90103944 A EP90103944 A EP 90103944A EP 90103944 A EP90103944 A EP 90103944A EP 0400274 B1 EP0400274 B1 EP 0400274B1
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- European Patent Office
- Prior art keywords
- bend
- casting
- gooseneck
- tube
- casting chamber
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- 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.)
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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
- 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
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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
- 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
Definitions
- the invention relates to a casting tank for hot-chamber die casting machines, which is cast in one piece from a heat-resistant tool steel and which has a casting chamber with the treads for the casting piston, as well as an approximately parallel riser hole, which is cast as a, in the area of the mouths to the casting chamber and a nozzle bent tube is designed.
- Such a casting container is known from DE-OS 27 21 928. This casting container is used in particular to hold aluminum.
- the casting chamber merges into a porous, one-piece tube made of a ceramic material, which serves as a riser bore and is cast into the main body of the casting chamber.
- the riser hole is cast in with the aid of inserted cores.
- the riser bore is led axially out of the casting container at one end and is closed there by an inserted screw.
- the connection to the casting chamber is made via a channel running perpendicular to the riser bore, which is also through an inserted core was produced and must also be closed to the outside by a screw. Both the riser hole and the transverse channel must therefore be machined in a relatively complex manner. This also applies to the connection cone for the nozzle provided in the area of the mouthpiece.
- the right-angled transition from the connecting channel to the riser bore and the approximately right-angled transition, also provided in the area of the mouthpiece, result in pressure losses for the flowing melt, which can have a disadvantageous effect on the working speed.
- the invention has for its object to design a casting container of the latter type so that pressure losses can be avoided and expensive machining operations can be saved.
- the tube is welded together from at least two parts, one of which is designed as a bend provided with a mouthpiece for attaching the nozzle.
- This configuration makes it possible, on the one hand, to effect the transition into the parallel part of the riser pipe with the aid of a favorable flow deflection.
- the welded design of the tube makes it possible to choose the geometry of the tube differently and to adapt it to the loads to be expected both for the deflection of the melt and for the loads to be expected due to the temperatures occurring.
- the riser pipe is assembled in a particularly advantageous manner from a first elbow in the area of the mouth to the casting chamber, from a substantially straight pipe section adjoining this and from a second elbow adjoining the pipe section in the area of the mouthpiece.
- both elbows can be individually adapted to the respective requirements without taking into account the dimensions of the straight line in between Pipe piece must be taken.
- the second manifold can, according to the features of claim 3, advantageously also consist of one piece with a receiving cone for the nozzle, so that here too there are no interface problems.
- the wall thickness of the receiving cone can increase towards the opening, so that the wall thickness at the critical point meets the loads that occur.
- subclaims 5 to 7 it is also possible to change the inside diameter of the elbow and to make it smaller in the direction of flow of the melt, so that an adaptation to the fluidic requirements is possible.
- subclaims 8 to 10 it is also possible to make the radii of curvature different and to design the wall thicknesses of the manifold parts differently, and to adapt them to the requirements that arise.
- the hot chamber die casting machine shown in FIG. 1 has a casting container (1) which is inserted from above into a trough (2) in which there is a molten metal.
- the metal to be melted is introduced into the trough through an opening closed with a flap (3).
- the trough (2) is arranged in an oven (4) so that the metal particles which have been introduced can be melted in it.
- a thermometer (5) is immersed, by means of which the temperature prevailing in the area of the casting container (1) can be monitored.
- the casting container (1) which is held by a crossmember (6), has a casting chamber (7) and a riser bore (9) connected to it, which leads to a mouthpiece (10) on which an inclined nozzle (11) is arranged.
- the casting chamber (7) consists of a sleeve-shaped part which is inserted in the casting container (1) and is shown in FIG. 2.
- a casting piston (12) is guided in the casting chamber (7) and is connected to a hydraulic cylinder (15) via a piston rod (13) and a coupling (14).
- the casting piston is in its top dead center position as shown in FIG. 1. Below this dead center position there are several bores (16) distributed uniformly over the circumference in the casting container (1), which connect the casting chamber (7) to the trough (2).
- the metal melt runs through the bores (16) into the casting chamber (7), from which it is pressed out via the riser bore (9) with the nozzle (11) by lowering the casting piston (12).
- the melt can flow back into the area of the riser hole (9) when the casting piston (12) is withdrawn from the nozzle (11), so that it remains within the heated area and does not solidify.
- the inside diameter of the upwardly open casting container (1) widens above the casting chamber (7). This area is also connected to the trough (2) via openings (17), so that the casting piston is also surrounded on its upper side by the melt.
- the casting container (1) shown in FIG. 2 is made as a casting from a heat-resistant tool steel alloy. Cast cast containers have economic advantages over a forged version. Also in modern hot chamber die casting machines, because of the higher casting pressures (up to 400 bar) necessary high-quality hot-work steels can be cast.
- the casting container (1) is provided with a riser hole (9) which consists of a pipe (18) cast in, which is welded together from three parts.
- the pipe (18) consists on the one hand of a bend (19) adjoining the casting chamber (7), an adjacent cylindrical pipe section (20) and a second bend (21) adjacent to the pipe section (20) in the region of the mouthpiece (10) ).
- the inside diameter of the first elbow (19) decreases from the mouth (22) to the casting chamber (7) up to the connection to the pipe section (20), which means that the inside diameter of the elbow (19) at the connection point to the pipe section ( 20) corresponds to the inside diameter (d) of the pipe section (20), but has the larger diameter (d 1) at the mouth (22).
- the mouth (22) is opposite an opening in the casting chamber (7), which has a diameter (d0) which is larger than (d1).
- the second elbow (21) also has at its connection point to the pipe section (20) the inner diameter (d), in the region of its mouth (23) in a receiving cone (24), however, the diameter (d2), which is smaller than the diameter (d ) is.
- the diameter d1 16 mm
- the diameter d 14 mm
- the diameter d2 12 mm.
- the elbow (21) is provided with a receiving cone (24) for the nozzle (11).
- This receiving cone (24) is arranged in one piece on the manifold (21).
- the cone angle of which can be approximately 5 ° the elbow (21) has an outwardly increasing wall thickness, the outer wall of the receiving cone (24) being at a larger cone angle than the receiving cone (24) itself, in the exemplary embodiment under a cone angle of 10 °, in the outer wall of the manifold part.
- the second elbow (21) therefore has an outer diameter (D) in the exemplary embodiment at the connection point to the pipe section (20) which corresponds to the outer diameter (D) of the pipe section (20) while it has a diameter (D M ) at the mouth (10) has that is much larger.
- the diameter D 24 mm
- the diameter D M 40 mm.
- the radii of curvature of the manifolds (19, 21) are also different. So the first manifold (19) has an inner radius (R1) which is greater than the inner radius (R2) of the second manifold (21); the outer radius of curvature (R3) of the first elbow (19) is larger than the outer radius of curvature (R4) of the second elbow (21).
- the inner radius R1 9 mm
- the outer radius of the first elbow R3 35 mm
- the outer radius of the second elbow R4 31 mm.
- the first elbow (19) which is welded to the pipe section (20) at the point (25), is adapted to the requirements of the flow of the molten metal occurring at this point.
- the 90 ° transition takes place without sharp corners, so that pressure losses or turbulence cannot occur in the melt pressed out of the casting chamber (7).
- the second elbow (21), which is welded to the pipe section (20) at the point (26), is individually adapted to the requirements that arise. Its inner diameter also tapers in the direction of flow, like the inner diameter of the first elbow (19).
- the second elbow (21) is also provided in one piece with the receiving cone (24), so that no difficulties arise at the connection point for the nozzle (11) at this point either.
- the wall thicknesses, in particular of the second elbow (21) in the region of the receiving cone (24) are also selected such that they meet the required requirements Withstand loads without the need for extensive reworking on the finished casting tank.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Chain Conveyers (AREA)
Description
Die Erfindung betrifft einen Gießbehälter für Warmkammer-Druckgießmaschinen, der aus einem warmfesten Werkzeugstahl einstückig gegossen ist und eine die Laufflächen für den Gießkolben aufweisende Gießkammer, sowie eine zu dieser etwa parallele Steigbohrung aufweist, die als ein eingegossenes, im Bereich der Mündungen zur Gießkammer und zu einer Düse gebogenes Rohr gestaltet ist.The invention relates to a casting tank for hot-chamber die casting machines, which is cast in one piece from a heat-resistant tool steel and which has a casting chamber with the treads for the casting piston, as well as an approximately parallel riser hole, which is cast as a, in the area of the mouths to the casting chamber and a nozzle bent tube is designed.
Ein solcher Gießbehälter ist aus der DE-OS 27 21 928 bekannt. Dieser Gießbehälter dient insbesondere zur Aufnahme von Aluminium. Die Gießkammer geht in ein als Steigbohrung dienendes, poröses, einstückiges Rohr aus einem keramischen Werkstoff über, das in den Hauptkörper der Gießkammer eingegossen ist.Such a casting container is known from DE-OS 27 21 928. This casting container is used in particular to hold aluminum. The casting chamber merges into a porous, one-piece tube made of a ceramic material, which serves as a riser bore and is cast into the main body of the casting chamber.
Bei einem anderen bekannten Gießbehälter (DE-AS 21 43 937) ist die Steigbohrung mit Hilfe von eingelegten Kernen miteingegossen. Um dies zu ermöglichen, ist die Steigbohrung an einem Ende axial aus dem Gießbehälter herausgeführt und wird dort durch eine eingesetzte Schraube verschlossen. Die Verbindung zur Gießkammer erfolgt über einen senkrecht zur Steigbohrung verlaufenden Kanal, der ebenfalls durch einen eingelegten Kern hergestellt wurde und nach außen auch durch eine Schraube verschlossen werden muß. Sowohl die Steigbohrung als auch der Querkanal müssen daher in relativ aufwendiger Weise bearbeitet werden. Dies gilt auch für den im Bereich des Mundstückes vorgesehenen Anschlußkonus für die Düse. Durch den rechtwinkligen Übergang von dem Verbindungskanal zur Steigbohrung und durch den, auch im Bereich des Mundstückes vorgesehenen etwa rechtwinkligen Übergang, entstehen Druckverluste für die fließende Schmelze, die sich nachteilig auf die Arbeitsgeschwindigkeit auswirken können.In another known casting container (DE-AS 21 43 937), the riser hole is cast in with the aid of inserted cores. In order to make this possible, the riser bore is led axially out of the casting container at one end and is closed there by an inserted screw. The connection to the casting chamber is made via a channel running perpendicular to the riser bore, which is also through an inserted core was produced and must also be closed to the outside by a screw. Both the riser hole and the transverse channel must therefore be machined in a relatively complex manner. This also applies to the connection cone for the nozzle provided in the area of the mouthpiece. The right-angled transition from the connecting channel to the riser bore and the approximately right-angled transition, also provided in the area of the mouthpiece, result in pressure losses for the flowing melt, which can have a disadvantageous effect on the working speed.
Der Erfindung liegt die Aufgabe zugrunde, einen Gießbehälter der zuletzt genannten Art so auszubilden, daß Druckverluste vermieden und aufwendige Bearbeitungsvorgänge eingespart werden können.The invention has for its object to design a casting container of the latter type so that pressure losses can be avoided and expensive machining operations can be saved.
Zur Lösung dieser Aufgabe ist das Rohr aus mindestens zwei Teilen zusammengeschweißt, von denen eines als ein mit einem Mundstück zum Ansetzen der Düse versehener Krümmer ausgebildet ist. Durch diese Ausgestaltung wird es zum einen möglich, den Übergang in den parallelen Teil des Steigrohres mit Hilfe einer strömungstechnischen günstigen Umlenkung zu bewirken. Durch die geschweißte Ausführung des Rohres wird es möglich, die Geometrie des Rohres unterschiedlich zu wählen und jeweils an die, sowohl für die Umlenkung der Schmelze als auch an die, durch die auftretenden Temperaturen zu erwartenden Belastungen anzupassen.To achieve this object, the tube is welded together from at least two parts, one of which is designed as a bend provided with a mouthpiece for attaching the nozzle. This configuration makes it possible, on the one hand, to effect the transition into the parallel part of the riser pipe with the aid of a favorable flow deflection. The welded design of the tube makes it possible to choose the geometry of the tube differently and to adapt it to the loads to be expected both for the deflection of the melt and for the loads to be expected due to the temperatures occurring.
Nach dem Anspruch 2 wird das Steigrohr in besonders vorteilhafter Weise aus einem ersten Krümmer im Bereich der Mündung zur Gießkammer, aus einem an diesen anschließenden, im wesentlichen geraden Rohrstück und aus einem zweiten, an das Rohrstück anschließenden Krümmer im Bereich des Mundstückes zusammengesetzt. Durch diese Ausgestaltung können beide Krümmer den jeweiligen Erfordernissen individuell angepaßt werden, ohne daß Rücksicht auf Abmessungen des dazwischenliegenden geraden Rohrstückes genommen werden muß. Der zweite Krümmer kann, nach den Merkmalen des Ansprüches 3, in vorteilhafter Weise, auch aus einem Stück mit einem Aufnahmekonus für die Düse bestehen, so daß auch hier keine Schnittstellenprobleme auftreten. Dabei kann nach Anspruch 4 die Wandstärke des Aufnahmekonus zur Öffnung hin zunehmen, so daß die Wandstärke an der kritischen Stelle den auftretenden Belastungen gerecht wird. Schließlich ist es nach den Merkmalen der Unteransprüche 5 bis 7 auch möglich, die Innendurchmesser der Krümmer zu ändern und in der Strömungsrichtung der Schmelze kleiner werden zu lassen, so daß eine Anpassung an die strömungstechnischen Erfordernisse möglich wird. Nach den Merkmalen der Unteransprüche 8 bis 10 ist es auch möglich, die Krümmungsradien unterschiedlich zu machen und die Wandstärken der Krümmerteile auch unterschiedlich auszubilden, und sie jeweils an die auftretenden Erfordernisse anzupassen.According to
Die Erfindung ist in der Zeichnung anhand eines Ausführungsbeispieles gezeigt und in der nachfolgenden Beschreibung erläutert. Es zeigen:
- Fig. 1
- einen schematischen Schnitt durch eine mit einem erfindungsgemäßen Gießbehälter ausgerüstete Warmkammer- Druckgießmaschine und
- Fig. 2
- einen Schnitt durch den Gießbehälter der Warmkammer- Druckgießmaschine der Fig. 1 in vergrößertem Maßstab.
- Fig. 1
- a schematic section through a hot chamber die casting machine equipped with a casting container according to the invention and
- Fig. 2
- a section through the casting tank of the hot chamber die casting machine of FIG. 1 in an enlarged scale.
Die in der Fig. 1 dargestellte Warmkammer- Druckgießmaschine besitzt einen Gießbehälter (1), der von oben in eine Wanne (2) eingesetzt ist, in der sich eine Metallschmelze befindet. Das zu schmelzende Metall wird in die Wanne über eine mit einer Klappe (3) verschlossenen Öffnung eingegeben. Die Wanne (2) ist in einem Ofen (4) angeordnet, so daß in ihr die eingegebenen Metallteilchen geschmolzen werden können. In die Wanne (2) taucht ein Thermometer (5) ein, durch welches die im Bereich des Gießbehälter (1) herrschende Temperatur überwacht werden kann.The hot chamber die casting machine shown in FIG. 1 has a casting container (1) which is inserted from above into a trough (2) in which there is a molten metal. The metal to be melted is introduced into the trough through an opening closed with a flap (3). The trough (2) is arranged in an oven (4) so that the metal particles which have been introduced can be melted in it. Into the tub (2) a thermometer (5) is immersed, by means of which the temperature prevailing in the area of the casting container (1) can be monitored.
Der Gießbehälter (1), der von einer Traverse (6) gehälten wird, besitzt eine Gießkammer (7) und eine mit dieser verbundene Steigbohrung (9), die zu einem Mundstück (10) führt, an dem eine geneigt angeordnete Düse (11) angeordnet ist. Die Gießkammer (7) besteht dabei aus einem in dem Gießbehälter (1) eingesetzten, hülsenförmigen Teil, das in Fig. 2 gezeigt ist.The casting container (1), which is held by a crossmember (6), has a casting chamber (7) and a riser bore (9) connected to it, which leads to a mouthpiece (10) on which an inclined nozzle (11) is arranged. The casting chamber (7) consists of a sleeve-shaped part which is inserted in the casting container (1) and is shown in FIG. 2.
In der Gießkammer (7) wird ein Gießkolben (12) geführt, der über eine Kolbenstange (13) und eine Kupplung (14) mit einem Hydraulikzylinder (15) verbunden ist. Der Gießkolben befindet sich nach der Darstellung in Fig. 1 in seiner oberen Totpunktlage. Unterhalb dieser Totpunktlage sind in dem Gießbehalter (1) mehrere gleichmäßig über den Umfang verteilte Bohrungen (16) vorgesehen, die die Gießkammer (7) mit der Wanne (2) verbinden. Über die Bohrungen (16) läuft die Metallschmelze in die Gießkammer (7), aus welcher sie über die Steigbohrung (9) mit der Düse (11) durch das Absenken des Gießkolbens (12) herausgepreßt wird. Durch die schräge Anordnung der Düse (11), kann die Schmelze beim Zurückziehen des Gießkolbens (12) aus der Düse (11) in den Bereich der Steigbohrung (9) zurückfließen, so daß Sie innerhalb des erwärmten Bereiches bleibt und nicht erstarrt. Der Innendurchmesser des nach oben offenen Gießbehälters (1) erweitert sich oberhalb der Gießkammer (7). Dieser Bereich steht über Öffnungen (17) ebenfalls mit der Wanne (2) in Verbindung, so daß der Gießkolben auch auf seiner Oberseite von der Schmelze umgeben ist.A casting piston (12) is guided in the casting chamber (7) and is connected to a hydraulic cylinder (15) via a piston rod (13) and a coupling (14). The casting piston is in its top dead center position as shown in FIG. 1. Below this dead center position there are several bores (16) distributed uniformly over the circumference in the casting container (1), which connect the casting chamber (7) to the trough (2). The metal melt runs through the bores (16) into the casting chamber (7), from which it is pressed out via the riser bore (9) with the nozzle (11) by lowering the casting piston (12). Due to the oblique arrangement of the nozzle (11), the melt can flow back into the area of the riser hole (9) when the casting piston (12) is withdrawn from the nozzle (11), so that it remains within the heated area and does not solidify. The inside diameter of the upwardly open casting container (1) widens above the casting chamber (7). This area is also connected to the trough (2) via openings (17), so that the casting piston is also surrounded on its upper side by the melt.
Der in der Fig. 2 dargestellte Gießbehälter (1), ist als ein Gußteil aus einer warmfesten Werkzeugstahllegierung hergestellt. Gegossene Gießbehälter haben wirtschaftliche Vorteile gegenüber einer geschmideten Ausführung. Auch die bei modernen Warmkammer- Druckgießmaschinen, wegen der höheren Gießdrücke (bis 400 Bar) notwendigen höherwertigen Warmarbeitsstähle lassen sich gießen.The casting container (1) shown in FIG. 2 is made as a casting from a heat-resistant tool steel alloy. Cast cast containers have economic advantages over a forged version. Also in modern hot chamber die casting machines, because of the higher casting pressures (up to 400 bar) necessary high-quality hot-work steels can be cast.
Der Gießbehälter (1) ist, wie Fig. 2 zeigt, mit einer Steigbohrung (9) versehen, die aus einem miteingegossen Rohr (18) besteht, das aus drei Teilen zusammengeschweißt ist. Das Rohr (18) besteht zum einen aus einem an die Gießkammer (7) anschließenden Krümmer (19), einem daran angrenzenden zylindrischen Rohrstück (20) und einem im Bereich des Mundstückes (10) an das Rohrstück (20) angrenzenden zweiten Krümmer (21). Der Innendurchmesser des ersten Krümmers (19) nimmt dabei von der Mündung (22) zur Gießkammer (7) bis zum Anschluß an das Rohrstück (20) ab, das heißt, daß der Innendurchmesser des Krümmers (19) an der Anschlußstelle an das Rohrstück (20) dem Innendurchmesser (d) des Rohrstückes (20) entspricht, an der Mündung (22) jedoch den größeren Durchmesser (d₁) aufweist. Die Mündung (22) liegt einer Öffnung in der Gießkammer (7) gegenüber, die einen Durchmesser (d₀) aufweist, der größer als (d₁) ist. Der zweite Krümmer (21) besitzt ebenfalls an seiner Anschlußstelle an das Rohrstück (20) den Innendurchmesser (d), im Bereich seiner Mündung (23) in einen Aufnahmekonus (24) jedoch den Durchmesser (d₂), der kleiner als der Durchmesser (d) ist. Beispielsweise kann bei einer praktischen Ausführungsform der Durchmesser d₁ = 16 mm, der Durchmesser d = 14 mm und der Durchmesser d₂ = 12 mm betragen. Der Übergang der Innendurchmesser der Krümmer (19, 21) vom größeren zum kleineren Innendurchmesser erfolgt kontinuierlich.As shown in FIG. 2, the casting container (1) is provided with a riser hole (9) which consists of a pipe (18) cast in, which is welded together from three parts. The pipe (18) consists on the one hand of a bend (19) adjoining the casting chamber (7), an adjacent cylindrical pipe section (20) and a second bend (21) adjacent to the pipe section (20) in the region of the mouthpiece (10) ). The inside diameter of the first elbow (19) decreases from the mouth (22) to the casting chamber (7) up to the connection to the pipe section (20), which means that the inside diameter of the elbow (19) at the connection point to the pipe section ( 20) corresponds to the inside diameter (d) of the pipe section (20), but has the larger diameter (d 1) at the mouth (22). The mouth (22) is opposite an opening in the casting chamber (7), which has a diameter (d₀) which is larger than (d₁). The second elbow (21) also has at its connection point to the pipe section (20) the inner diameter (d), in the region of its mouth (23) in a receiving cone (24), however, the diameter (d₂), which is smaller than the diameter (d ) is. For example, in a practical embodiment, the diameter d₁ = 16 mm, the diameter d = 14 mm and the diameter d₂ = 12 mm. The transition of the inside diameter of the manifold (19, 21) from the larger to the smaller inside diameter takes place continuously.
Der Krümmer (21) ist, wie bereits angedeutet wurde, mit einem Aufnahmekonus (24) für die Düse (11) versehen. Dieser Aufnahmekonus (24) ist einstückig am Krümmer (21) angeordnet. Der Krümmer (21) weist im Bereich des Aufnahmekonus (24), dessen Kegelwinkel etwa 5° betragen kann, eine sich nach außen vergrößernde Wandstärke auf, wobei die Außenwand des Aufnahmekonus (24) unter einem größeren Konuswinkel als der Aufnahmekonus (24) selbst, beim Ausführungsbeispiel etwa unter einem Kegelwinkel von 10°, in die Außenwandung des Krümmerteiles übergeht. Der zweite Krümmer (21) besitzt daher beim Ausführungsbeispiel an der Anschlußstelle zum Rohrstück (20) einen Außendurchmesser (D), der dem Außendurchmesser (D) des Rohrstückes (20) entspricht während er an der Mündung (10) einen Durchmesser (DM) aufweist, der wesentlich größer ist. Bei einem bevorzugten Ausführungsbeispiel kann der Durchmesser D = 24 mm, der Durchmesser DM = 40 mm betragen.As already indicated, the elbow (21) is provided with a receiving cone (24) for the nozzle (11). This receiving cone (24) is arranged in one piece on the manifold (21). In the area of the receiving cone (24), the cone angle of which can be approximately 5 °, the elbow (21) has an outwardly increasing wall thickness, the outer wall of the receiving cone (24) being at a larger cone angle than the receiving cone (24) itself, in the exemplary embodiment under a cone angle of 10 °, in the outer wall of the manifold part. The second elbow (21) therefore has an outer diameter (D) in the exemplary embodiment at the connection point to the pipe section (20) which corresponds to the outer diameter (D) of the pipe section (20) while it has a diameter (D M ) at the mouth (10) has that is much larger. In a preferred embodiment, the diameter D = 24 mm, the diameter D M = 40 mm.
Auch die Krümmungsradien der Krümmer (19, 21) sind unterschiedlich. So besitzt der erste Krümmer (19) einen Innenradius (R₁) der größer ist als der Innenradius (R₂) des zweiten Krümmers (21); auch der Außenkrümmungsradius (R₃) des ersten Krümmers (19) ist größer als der Außenkrümmungsradius (R₄) des zweiten Krümmers (21). Bei dem gezeigten Ausführungsbeispiel beträgt der Innenradius R₁ = 9 mm, der Innenradius (R₂) des zweiten Krümmers (21) 7 mm, der Außenradius des ersten Krümmers R₃ = 35 mm und der Außenradius des zweiten Krümmers R₄ = 31 mm.The radii of curvature of the manifolds (19, 21) are also different. So the first manifold (19) has an inner radius (R₁) which is greater than the inner radius (R₂) of the second manifold (21); the outer radius of curvature (R₃) of the first elbow (19) is larger than the outer radius of curvature (R₄) of the second elbow (21). In the embodiment shown, the inner radius R₁ = 9 mm, the inner radius (R₂) of the second elbow (21) 7 mm, the outer radius of the first elbow R₃ = 35 mm and the outer radius of the second elbow R₄ = 31 mm.
Aus dem Vorstehenden wird deutlich, daß der erste Krümmer (19), der an der Stelle (25) mit dem Rohrstück (20) verschweißt ist, den Erfordernissen der an dieser Stelle auftretenden Strömung der Metallschmelze angepaßt ist. Der 90°-Übergang erfolgt ohne scharfe Ecken, so daß Druckverluste oder Verwirbelungen in der aus der Gießkammer (7) herausgepreßten Schmelze nicht auftreten können. Auch der zweite Krümmer (21), der an der Stelle (26) mit dem Rohrstück (20) verschweißt ist, ist individuell den auftretenden Erfordernisse angepaßt. Auch sein Innendurchmesser verjüngt sich in Strömungsrichtung, so wie der Innendurchmesser des ersten Krümmers (19). Der zweite Krümmer (21) ist außerdem einstückig mit dem Aufnahmekonus (24) versehen, so daß auch an dieser Stelle keine Schwierigkeiten an der Anschlußstelle für die Düse (11) auftreten. Schließlich sind auch noch die Wandstärken, insbesondere des zweiten Krümmers (21) im Bereich des Aufnahmekonus (24) so gewählt, daß sie den erforderlichen Belastungen standhalten, ohne daß am fertigen Gießbehälter aufwendige Nacharbeiten notwendig wären.From the above it is clear that the first elbow (19), which is welded to the pipe section (20) at the point (25), is adapted to the requirements of the flow of the molten metal occurring at this point. The 90 ° transition takes place without sharp corners, so that pressure losses or turbulence cannot occur in the melt pressed out of the casting chamber (7). The second elbow (21), which is welded to the pipe section (20) at the point (26), is individually adapted to the requirements that arise. Its inner diameter also tapers in the direction of flow, like the inner diameter of the first elbow (19). The second elbow (21) is also provided in one piece with the receiving cone (24), so that no difficulties arise at the connection point for the nozzle (11) at this point either. Finally, the wall thicknesses, in particular of the second elbow (21) in the region of the receiving cone (24), are also selected such that they meet the required requirements Withstand loads without the need for extensive reworking on the finished casting tank.
Claims (10)
- Gooseneck (1) for hot chamber-type die-casting machines which is integrally cast from a heat-resistant tool steel and comprises a casting chamber (7), comprising the running surfaces for the plunger, and an ascending bore (9) which is approximately parallel to the casting chamber and is formed as an integrally cast tube (18) which is curved in the vicinity of the outlets (22) to the casting chamber (7) and to a nozzle (11), characterised in that the tube (18) is welded together from at least two parts of which one is formed as a bend (21) provided with a mouthpiece (10) for mounting the nozzle (11).
- Gooseneck according to Claim 1, characterised in that the tube (18) is composed of a first bend (19) in the vicinity of the outlet to the casting chamber (7), of a straight tube part (20) which substantially adjoins the first bend (19), and of the second bend (21) adjoining the tube part (20).
- Gooseneck according to either of Claims 1 and 2, characterised in that the second bend (21) consists of a part with a mounting cone (24) for the nozzle.
- Gooseneck according to Claim 3, characterised in that the wall thickness of the mounting cone (24) increases towards the opening (17).
- Gooseneck according to any one of Claims 1 to 3, characterised in that the internal diameter of the second bend (21) is adapted on one side to the internal diameter (d) of the tube part (20) and decreases towards the mounting cone (24).
- Gooseneck according to any one of Claims 1 to 5, characterised in that the tube part (20) is cylindrical.
- Gooseneck according to any one of Claims 1 to 6, characterised in that the first bend (19), on the side adjoining the tube part (20), has an internal diameter which is adapted to the internal diameter (d) of the tube part (20) but, at the outlet (22) to the casting chamber (7), has a larger internal diameter (d₁).
- Gooseneck according to any one of Claims 1 to 7, characterised in that the radii of curvature (R₁ and R₃) of the first bend (19) are larger than the radii of curvature (R₂ and R₄) of the second bend (21).
- Gooseneck according to any one of Claims 1 to 8, characterised in that the wall thicknesses of the second bend (21) are larger than those of the first bend (19).
- Gooseneck according to Claim 9, characterised in that the wall thicknesses of the second bend (21) increase in the vicinity of the radii of curvature (R₂, R₄) towards the mounting cone (24).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3917487 | 1989-05-30 | ||
| DE3917487A DE3917487A1 (en) | 1989-05-30 | 1989-05-30 | CASTING CONTAINER FOR WARM CHAMBER DIE CASTING MACHINES |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0400274A2 EP0400274A2 (en) | 1990-12-05 |
| EP0400274A3 EP0400274A3 (en) | 1992-04-08 |
| EP0400274B1 true EP0400274B1 (en) | 1993-12-01 |
Family
ID=6381633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90103944A Expired - Lifetime EP0400274B1 (en) | 1989-05-30 | 1990-03-01 | Gooseneck for hot chamber-type die-casting machines |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5072778A (en) |
| EP (1) | EP0400274B1 (en) |
| JP (1) | JP3014715B2 (en) |
| DE (2) | DE3917487A1 (en) |
| ES (1) | ES2047176T3 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1260341B (en) * | 1992-05-26 | 1996-04-05 | HOT CHAMBER DIE CASTING MACHINE FOR LIGHT ALLOYS | |
| DE4419848C1 (en) * | 1994-06-07 | 1995-12-21 | Frech Oskar Gmbh & Co | Hot chamber die casting machine |
| DE4439871C1 (en) * | 1994-11-08 | 1996-01-04 | Friedrich Druckgiestech Gmbh | Die casting molten metal container |
| DE50000293D1 (en) * | 2000-08-21 | 2002-08-22 | Frech Oskar Gmbh & Co | Process for producing a casting container and casting container |
| DE102004027109A1 (en) * | 2004-06-03 | 2005-12-29 | Siempelkamp Giesserei Gmbh | Production of a tool having an impression used as a pressing tool, deforming tool or forging tool comprises placing pipelines into a cast mold, casting around the pipelines and integrating the pipelines as heating and/or cooling channels |
| JP5615640B2 (en) * | 2010-09-16 | 2014-10-29 | 株式会社広築 | Non-ferrous metal melt supply equipment |
| IT201700033183A1 (en) * | 2017-03-27 | 2018-09-27 | Flavio Mancini | PLANT FOR THE HOT-CASTING DIE-CASTING OF NON-FERROUS ALLOYS |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2721928A1 (en) * | 1976-05-20 | 1977-12-08 | Toshiba Machine Co Ltd | PUMP FOR USE IN A HOT CHAMBER INJECTION MOLDING MACHINE |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1878490U (en) * | 1963-01-03 | 1963-08-29 | Ewald Schulte | DIE CASTING MACHINE FOR PROCESSING ZINC OR SIMILAR METAL ALLOYS. |
| DE2143937B2 (en) * | 1971-09-02 | 1977-05-18 | Oskar Frech, Werkzeugbau, 7061 Weiler | CASTING CONTAINER FOR A HOT CHAMBER DIE CASTING MACHINE |
| JPS555139A (en) * | 1978-06-24 | 1980-01-16 | Toshiba Mach Co Ltd | Injection pump device for molten metal |
| US4556098A (en) * | 1978-08-18 | 1985-12-03 | Laboratoire Suisse De Recherches Horlogeres | Hot chamber die casting of aluminum and its alloys |
| US4587177A (en) * | 1985-04-04 | 1986-05-06 | Imperial Clevite Inc. | Cast metal composite article |
-
1989
- 1989-05-30 DE DE3917487A patent/DE3917487A1/en not_active Withdrawn
-
1990
- 1990-03-01 EP EP90103944A patent/EP0400274B1/en not_active Expired - Lifetime
- 1990-03-01 ES ES90103944T patent/ES2047176T3/en not_active Expired - Lifetime
- 1990-03-01 DE DE90103944T patent/DE59003655D1/en not_active Expired - Fee Related
- 1990-04-10 JP JP2093291A patent/JP3014715B2/en not_active Expired - Fee Related
- 1990-05-22 US US07/526,588 patent/US5072778A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2721928A1 (en) * | 1976-05-20 | 1977-12-08 | Toshiba Machine Co Ltd | PUMP FOR USE IN A HOT CHAMBER INJECTION MOLDING MACHINE |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH035056A (en) | 1991-01-10 |
| ES2047176T3 (en) | 1994-02-16 |
| EP0400274A3 (en) | 1992-04-08 |
| US5072778A (en) | 1991-12-17 |
| DE59003655D1 (en) | 1994-01-13 |
| DE3917487A1 (en) | 1990-12-06 |
| EP0400274A2 (en) | 1990-12-05 |
| JP3014715B2 (en) | 2000-02-28 |
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