EP3274113A1

EP3274113A1 - Apparatus for filling a melt into a casting chamber, and method for filling melt into a casting chamber

Info

Publication number: EP3274113A1
Application number: EP16711684.7A
Authority: EP
Inventors: Christian Hirsch; Lucas Schulte-Vorwick
Original assignee: Bayerische Motoren Werke AG
Current assignee: Bayerische Motoren Werke AG
Priority date: 2015-03-25
Filing date: 2016-03-24
Publication date: 2018-01-31
Anticipated expiration: 2036-03-24
Also published as: CN107107179A; EP3274113B1; DE102015205401A1; US20170341138A1; WO2016151119A1; US10537936B2; CN107107179B

Abstract

The invention relates to an apparatus (10) for introducing a melt (60) into a casting chamber (50) for a die casting operation, said apparatus (10) comprising a tundish (20) with an inner volume (26) that can be filled with the melt (60). The invention further relates to a method for filling, by means of an apparatus (10), a melt (60) into a casting chamber (50) for a die casting operation.

Description

description

Device for filling a melt in a casting chamber and method for filling melt in a casting chamber

The present invention relates to a device for filling a melt into a casting chamber for a die casting, comprising an intermediate container with an internal volume, wherein the internal volume can be filled with the melt. Furthermore, the invention relates to a method for filling a melt in a casting chamber for a die casting by means of a device.

In modern technology, die casting processes are often used for serial or mass production of structural parts. In known die casting method, liquid melt is first filled in a casting chamber, in particular filled in a metered manner. With the help of a casting piston, the melt is then accelerated in the casting chamber and shot into a casting mold. There, the melt solidifies to the component to be produced. For metering the melt into the casting chamber, in particular two devices are known in the prior art.

A first such metering device is a ladle, which is filled in particular by immersion with liquid melt. The melt can be for example in a holding furnace. Too much absorbed melt can drain, for example, by tilting the ladle back into the holding furnace. In order to fill the melt in the casting chamber, the ladle is positioned above a filling opening in the casting chamber and emptied by tilting it into the casting chamber. Another possibility for metering melt into a casting chamber is a closed metering furnace in which the liquid melt is located. To fill a casting chamber, the interior of the metering furnace is pressurized. Via a riser tube, which is located below a level of the melt in the furnace, the melt can ascend and, for example via a channel or a suitable device in a filling opening of the

Pour in the casting chamber. Upon reaching a desired dosage, the pressure in the furnace is lowered and the filling in the casting chamber thereby terminated. The known devices and methods for filling a melt in a casting chamber have several disadvantages. Thus, for example, during the pouring of the melt from a ladle into the casting chamber, a tapering, parabolic jet of melt is formed. This impinges on an inner surface of the casting chamber at an uncontrollable angle. Due to the high impulse when hitting, especially due to the high

Flow velocity of the melt, can cause leaching on the inner surface of the casting after a short time. This

Wear leads to a reduced service life of the casting chamber. Height

Maintenance costs are the result. In addition, the high drop height of the melt between the ladle and the inner surface of the casting chamber upon impingement in the casting chamber favors the formation of turbulence and oxides. However, such oxides can negatively affect the

Properties and affect the quality of the component produced. When using a metering furnace as described above, the dosage of the melt quantity via a regulation of the pressure in the furnace chamber. These

The procedure is very inaccurate and can result in a dose inaccuracy of up to +/- 2.5%. Various quantities of melt in the

Casting chamber, however, have a negative effect on the quality of the component to be produced, since too low a filling quantity, for example, the mold for the component is not completely filled and at too large a filling amount of press residue is unnecessarily large, which are melted energy and costly again got to. A high rejection of the produced components and / or an increase in the manufacturing costs due to the additionally necessary melting processes are the consequences. In addition, such is

Dosing system based on overpressure, very sluggish, which is associated with a significant impact on a cycle time in the production of components.

It is therefore the object of the present invention, the above

described disadvantages of known devices for filling a melt in a casting chamber for a die-casting and method for filling a melt in a casting chamber for a die-casting at least partially correct. In particular, it is an object of the present invention to provide a

Device for filling a melt into a casting chamber for a

Die casting and a method for filling a melt in a casting chamber for die casting to provide, in a simple and cost-effective manner, the filling of a melt into a casting chamber for die casting improve, in particular, a wear of the casting chamber is reduced and a quality of the manufactured by the die-cast component is increased.

In a first aspect of the invention, the above object is achieved by a device for filling a melt in a casting chamber for die casting with the features of independent claim 1. According to a second aspect of the invention, the object is achieved by a method for filling a melt in a casting chamber for a die casting with the features of claim 13. Further features and details of the invention will become apparent from the dependent claims, the description and the drawings. In this case, features and details that are described in relation to a device according to the invention apply, of course, also with respect to a method according to the invention and in each case vice versa, so that with respect to the disclosure of the individual aspects of the invention always reciprocal reference is or can be.

According to a first aspect of the invention, the object is achieved by a device for filling a melt into a casting chamber for a

Die casting, comprising an intermediate container with an internal volume, wherein the internal volume can be filled with the melt. A device according to the invention is characterized in that the intermediate container in the casting chamber is reversibly arranged over an inner surface of the casting chamber, wherein the intermediate container has a pouring opening for filling the melt into the casting chamber and a closure body for opening and closing the pouring opening.

A device according to the invention is designed for filling a melt into a casting chamber for diecasting. As a melt, for example, molten aluminum can be used. For this purpose, the device has an intermediate container with an internal volume. The

Inner volume can be filled with the melt. Is essential to the invention that the intermediate container in the casting chamber reversible over a

Inner surface of the casting chamber can be arranged. In this case, arranging over the inner surface of the casting chamber in the sense of the invention means in particular that the intermediate container is at least partially inside the casting chamber and the distance between the pouring opening of the intermediate container and the inner surface of the casting chamber is low. This distance, the so-called Auslassspalt, is preferably not more than about 10-200% of

Diameter of the spout opening and / or less than about 15 cm, preferably less than about 5 cm, more preferably less than about 1 cm. Due to this small outlet gap between the spout opening and the inner surface of the casting chamber, a high impact velocity of the

Melt can be safely avoided on the inner surface of the casting chamber when filling the melt into the casting chamber, leaching on the inner surface of the casting chamber can be prevented and overall wear of the casting chamber can be reduced. A longer service life of the casting chamber can be made possible. For filling the melt in the casting chamber, the melt is previously filled into the internal volume of the intermediate container. It is particularly conceivable, the level of the melt in the internal volume of the

To monitor intermediate container, for example by a suitable laser and / or ultrasonic method and / or eddy current method. Of course, in this case, the device, in particular the intermediate container, have the necessary sensors and evaluation devices. By such a monitoring of the level in the inner volume can be ensured in particular a constant filling amount of melt in the inner volume of the intermediate container. A consistent filling of the casting chamber with a constant amount of melt can be made possible. As a result, on the one hand, an increase in the quality of the component to be cast, and thereby a reduction of a small amount due to filling Committee of defective components allows. On the other hand, the press rest on a required size. A reduction in the manufacturing cost of the components can be made possible. In particular, it can also be provided, for example, that the inner volume has as surface material at least in sections a ceramic and / or a coated metal, in particular a metal coated with a size. This can be a complete

Outflow of the melt can be achieved in the casting chamber. Another

Increasing the component quality can be achieved in that, after the intermediate container has been arranged near the inner surface of the casting chamber and the pouring opening has been opened, the intermediate container remains in this position until the entire melt from the inner volume of the

The intermediate container has flowed out into the casting chamber. This is the result

Spout opening below the level of the melt in the casting chamber as soon as this level exceeds the outlet gap. This can be avoided that the melt, when filled into the casting chamber, pierces an oxide layer which forms on the surface of the melt in the casting chamber. A swirling up of this oxide layer and a resulting distribution of this oxide layer in the melt can thus be avoided. This can improve the purity of the

Increased melt in the casting chamber and consequently in turn the quality of the component to be cast can be increased. Overall, the wear of the casting chamber used can thus be reduced by a device according to the invention and at the same time the quality of the produced die-cast components can be increased.

Furthermore, it can be provided in a device according to the invention that the intermediate container and / or the inner volume are funnel-shaped. It means funnel-shaped in the context of the invention that the intermediate container and / or the inner volume are at least partially conical. It may be particularly preferably provided that the funnel-shaped intermediate container tapers in the direction of the spout opening. Such a funnel-shaped intermediate container, in which in particular the outer shape of the intermediate container is funnel-shaped, thus has at least

in sections, an outer, conical shape. This shaping can act as an insertion aid and / or centering aid in a filling opening of the casting chamber. The arrangement of the intermediate container over the inner surface of the casting chamber can be facilitated thereby. Through a funnel-shaped internal volume can be achieved that a melt, which is located in the internal volume of the intermediate container, can flow through the spout opening particularly well. It can be particularly preferably provided that the inner volume is formed in such a funnel-shaped, which tapers an inner diameter of the inner volume in the direction of the spout opening. As a result, it is possible that the internal volume can be emptied completely passively when the spout is open, and no melt remains inside the internal volume, solely by gravity alone. A particularly good metering of the amount of

Melt introduced into the casting chamber can thereby be achieved.

It can also be provided in a device according to the invention that the closure body as a valve body for opening and closing the

Spout opening is formed, wherein the valve body closes the spout opening in a first position and releases the spout opening in a second position. A valve body is a particularly simple way to to provide a closure body. In this case, the valve body may be particularly preferred in the interior or at least substantially in the interior of the

Be arranged inside volume of the intermediate container. It can the

Valve body in its first position as a plug close the spout opening and can easily be moved towards the interior of the inner volume to its second position to release the spout opening and thereby open. This arrangement has the particular advantage that the melt, by the force of gravity, exerts a force on the valve body which presses the valve body into its first position on the pouring opening. A particularly tight closure of the spout opening through such a valve body can be made particularly simple.

In a further development of a device according to the invention may further be provided that the valve body has a contact projection which protrudes from the intermediate container, in particular from the spout opening and is formed for contacting the inner surface in the casting chamber, wherein by contacting the valve body from its first in his second position can be brought. In terms of its geometry, this contact projection is designed such that it can be used according to the invention, in particular that it is designed to contact the inner surface in the casting chamber.

In particular, it may be provided that the contact projection protrudes farther out of the intermediate container or the pouring spout than the outlet gap, which in an arrangement of the intermediate container over the

Inner surface between the spout opening and the inner surface of the casting chamber remains. As a result, the contact projection bridges this distance between the intermediate container and the inner surface of the casting chamber. When arranging the intermediate container over the inner surface of the casting chamber, the contact projection thus contacts the inner surface of the casting chamber even before the casting

Intermediate container in the casting chamber has assumed its final position. As a result, the valve body is pressed into the interior of the intermediate container, thereby automatically opening the spout opening. This represents a particularly simple opening of the spout opening, since this automatically occurs when an arrangement of the intermediate container over the inner surface of the casting chamber. Elaborate control mechanisms for opening the spout opening of the intermediate container can be avoided. A device according to the invention can thus be made simpler overall. In addition, a device according to the invention can be designed such that an elastic element, in particular a spring, is provided, the force of which acts on the valve body in the direction of its first position. By this elastic element thus the valve body is pressed into its first position in which the spout opening is closed by the valve body. In particular, if no contact projection of the inner surface of the casting chamber is present, thus causing the elastic element

automatic closing of the spout opening. This is particularly advantageous when the intermediate container is removed after filling the melt in the casting chamber from this again. Such an elastic element thus represents a particularly simple and inexpensive possibility to automatically close the spout opening through the valve body

provide. Additional actuators, such as motors, are not necessary. Another simplification in the construction of an inventive

Device can be made possible.

In a further development of a device according to the invention, it may further be provided that the valve body is at least partially plug-like, plate-like or trough-like, in particular omega-shaped. Particularly preferred may be provided that these configurations of the valve body are arranged at the end of the valve body, where the melt can flow into the casting chamber. Also can

be provided, of course, that a sealing surface, which may be provided for contacting a surface of the spout opening on the valve body, correlated with these different embodiments or adapted to these embodiments. The different

Embodiments have various advantages. Thus, a plug-like configuration of a valve body allows a particularly laminar

Outflow of the melt into the casting chamber. Disturbing turbulence in the melt can thus be avoided. By a plate-like configuration of the valve body, a concentric outflow of the melt can be achieved in the casting chamber. The melt is evenly distributed in the casting chamber, whereby a load on the casting chamber, as would occur, for example, in a punctual impact of the melt, can be avoided. By a trough-like configuration of the valve body can

For example, a sloshing of the melt in the casting chamber, which may be associated with a high local load on the casting chamber, can be avoided. By an omegamuldenartige configuration in which the trough is shaped like the Greek letter omega, in particular the outflow of the melt from the intermediate container a preferred direction, which is predetermined by the opening of the omega, can be impressed. In particular, the filling of an elongated casting chamber can be improved by such an at least partially directed melt jet.

Also, a device according to the invention can be further developed such that a valve seat ring is arranged on the spout opening, and that the valve body has a contact cone, in particular a contact cone with an angle of approximately 5 °, for contacting the valve seat ring. Preferably, the valve seat ring and / or the contact cone taper in the direction of the first position of the valve body. In particular, it can also be provided that the valve seat ring and the contact cone are matched to one another. A particularly good sealing of the spout opening can be achieved.

Also, a device according to the invention can be designed in a further development to the effect that the valve body is mounted linearly movable in a bearing device. Such a storage device for linear

Storage represents a particularly simple movable attachment of the valve body in the intermediate container. In particular, a linear displacement of the valve body at a contact between the contact projection and the inner surface of the casting chamber can be provided by such a storage device particularly simple. In a further development, moreover, by a corresponding helical groove and a pin formed to engage in the groove, a rotational movement of a few degrees, preferably of about 15 ° or less, is superposed on the linear movement. The groove on the valve body and the pin on the

Storage device may be arranged, or vice versa. The sealing of the

Spout opening through the valve body can be further improved.

According to a particularly preferred embodiment of a

Device according to the invention may further be provided that the

Intermediate container is fixedly disposed on a trough, wherein the

Intermediate tank is filled via the trough and together with the Gießrinne for arranging over the inner surface of the casting chamber is pivotable. By such a trough filling the inner volume of the intermediate container is particularly easy. Also arranging the

Zwischenbehälters over the inner surface of the casting chamber can in this

Embodiment of a device according to the invention are made particularly simple. The pivoting of the system of intermediate container and trough can be carried out for example by a simple wave with a cam. In particular, a coupling of the movement of the intermediate container or the runner to a movement of a casting piston in the casting chamber is preferably conceivable, wherein the piston for shooting the melt in the actual casting mold in the actual

Die casting process is provided. A collision of the intermediate container, which can be arranged in the casting chamber, and the piston, which moves in the casting chamber, can be particularly easily prevented.

Preferably, a device according to the invention can be developed to the effect that the intermediate container and / or runner are formed closed. By such a closed training, for example, heat losses of the melt in the inner volume or the runner can be prevented, whereby a total of energy can be saved. In addition, such a cover can also be used to protect, for example, sensors arranged for level measurement inside the internal volume. In addition, in a further development of an inventive

Be provided device that the intermediate container and / or the trough at least partially with a protective gas, in particular with argon, are filled or filled. By such a protective gas, in particular a

Reaction of the melt with oxygen, in particular with atmospheric oxygen, can be prevented. As a result, in particular the formation of an oxide layer on the

Surface of the melt can be avoided, whereby overall the purity of the melt and thus the quality of a produced from the melt component can be improved. Furthermore, it can be provided in a device according to the invention that the intermediate container has an overflow opening for limiting a level of

Having melt in the internal volume. The level of the melt in the internal volume Of the intermediate container can of course be monitored by a suitable sensor, for example by laser sensors and / or ultrasonic sensors and / or sensors for an eddy current method to ensure a uniform filling amount of melt in the internal volume. In case of failure in the sensor and / or if no such sensor is present, it can still be ensured by an overflow opening that a certain amount of melt in the inner volume is not exceeded. If the inner volume is filled with too much melt, it can flow out of the inner volume through the overflow opening. Of course, it may be provided to collect and reuse the exiting melt outside of the intermediate container. By means of such an overflow opening, a constant and / or defined filling quantity of melt in the internal volume of the intermediate container can thus be ensured even without Sensonk or with failed sensors.

According to a second aspect of the invention, the object is achieved by a method for filling a melt into a casting chamber for diecasting by means of a device, in particular having the features according to the first aspect of the invention. A method according to the invention is characterized by the following steps: a) filling the melt into an internal volume of an intermediate container of the device,

b) arranging the intermediate container over an inner surface of the casting chamber, c) opening a pouring opening of the intermediate container for filling the melt into the casting chamber by means of a closing body of the casting chamber

Intermediate container,

d) filling the melt into the casting chamber,

e) closing the spout opening through the closure body, and f) moving the intermediate container away from the inner surface.

Particularly preferably, it can be provided in the method according to the invention that the method is carried out using a device according to the first aspect of the invention. All the benefits of a

Device according to the invention, which is formed according to the first aspect of the invention, thus of course also arise for a inventive method that using such

Device is performed.

In step a) of the process according to the invention melt is in a

Filled inside volume of an intermediate container. In particular, it may of course be provided that measures are taken to ensure a constant filling amount of melt in the inner volume of the intermediate container. In step b) of the method according to the invention is the

Intermediate tank arranged over an inner surface of the casting chamber. In this case, the intermediate container is arranged above the inner surface such that a

Auslassspalt, that is the distance between a spout opening of the

Zwischenbehälters and the inner surface of the casting chamber, is low. Of the

Outlet gap is preferably less than about 10% to about 200% of a diameter of the spout opening and / or less than about 15 cm, preferably less than 5 cm, more preferably less than about 1 cm. In step c) of the method according to the invention by a closure body of

Intermediate container, the spout opening of the intermediate container opened to allow filling of the melt into the casting chamber. This is carried out in step d) of the method according to the invention. In this case, the filling of the melt into the casting chamber in step d) is carried out, in particular preferably passively, purely by the action of gravity on the melt. In this case, the intermediate container preferably remains in its position over the inner surface of the casting chamber during the entire filling process in step d). As a result, a filling of the melt below a level of the melt in the casting chamber is at least temporarily possible, whereby a whirling up of any existing oxide layer on the surface of the melt in the casting chamber can be avoided. After completion of the filling of the melt in the casting chamber is closed in step e) by a movement of the closure body, the spout opening, and around it in step f) the intermediate container moves away from the inner surface of the casting chamber, in particular completely out of the

Casting chamber moved out. Of course, both in steps b) and c) and in steps e) and f), an at least partial simultaneous execution of the movement of the intermediate container and the opening or

Closing the spout opening conceivable. By an inventive

The method can thus in a method in particular by a small drop height of the melt between the spout opening and the inner surface of the casting chamber damage to the inner surface, in particular by Washouts are to be avoided. By using the

Intermediate container can also be a constant amount of melt for the casting chamber can be achieved. Overall, thus filling a

Casting chamber with melt simplified, accelerated and cost-effectively designed.

Furthermore, it can be provided in a method according to the invention that in step a) a level of the melt in the inner volume is monitored, preferably by a laser measuring method and / or an ultrasonic measuring method and / or an eddy current method to determine a filling amount of the melt in the inner volume, in particular When determining the filling amount, deposits in the internal volume must be taken into account. Of course, one can

Device that is designed to carry out a method according to the invention, the necessary sensors, such as laser sensors and / or

Ultrasonic sensors and / or sensors for an eddy current method, and have required for the evaluation evaluation. By the

Monitoring the level of the melt in the inner volume, in particular by an additional consideration of deposits in the inner volume, a constant amount of melt in the inner volume and thus in the casting chamber can be achieved particularly easily. A particularly effective filling in the casting chamber with just the right amount of melt can be achieved in a particularly simple and, in particular, reproducible manner.

Also, a method according to the invention can be further developed such that the intermediate container, in particular the inner volume, and / or a runner, are heated and / or that the intermediate container, in particular the inner volume, is cleaned before step a). By heating the

Zwischenbehälters, in particular of the inner volume deposits of the melt in the inner volume can be prevented because the melt can always be kept liquid by heating. Maybe yet existing

Deposits can be removed by cleaning from the intermediate container, in particular from the internal volume, and / or the trough. Both measures thus allow an internal volume without deposits, whereby a constant amount of melt in the inner volume can be particularly easily ensured. Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, embodiments of the invention are described in detail. The features mentioned in the claims and in the description may each be essential to the invention individually or in any desired combination.

Elements with the same function and mode of operation are provided with the same reference numerals in the individual figures. They show schematically:

1, 2, 3 a first embodiment of a device according to the invention in carrying out a method according to the invention,

4, 5, 6 a second embodiment of a device according to the invention in carrying out a method according to the invention, and Fig. 7 different embodiments of a valve body a

Device according to the invention.

Figs. 1, 2 and 3 show a first embodiment of a

Device 10 according to the invention during various stages of a method according to the invention. FIGS. 1, 2 and 3 will therefore be described together below, reference being made to individual figures where appropriate and necessary. A device 10 according to the invention is designed to fill a melt 60 into a casting chamber 50. For this, the device 10 according to the invention has an intermediate container 20. This

Intermediate tank 20 further has an internal volume 26 which can be filled with the melt 60. By a closure body 27, which in the present

Embodiment is designed as a valve body 30 and which is in Figs. 1 and 2 in its first position 33, a spout opening 21 at the lower end of the intermediate container 20 is closed. In particular, the

Valve body 30 has a contact cone 32 which is adapted to a valve seat ring 22 of the spout opening 21 on. A particularly good sealing of the inner volume 26 of the intermediate container 20 can be achieved thereby, whereby the melt 60 in the closed spout 21 securely in

Inner volume 26 can be maintained. A level 61 of the melt 60 in the inner volume 26 can be monitored, for example, by a laser and / or ultrasonic measurement and / or an eddy current method to ensure a constant amount of melt 60 in the inner volume 26. The intermediate container 20 is funnel-shaped, that is, in particular conical, formed, whereby when arranging the intermediate container 20 via an inner surface 51 of the casting chamber 50, wherein the intermediate container 20 is at least partially introduced through a filling opening 52 into the interior of the casting chamber 50, an insertion the intermediate container 20 can be facilitated in the casting chamber 50 and, for example, a self-centering of the intermediate container 20 can be made in the filling opening. Fig. 2 shows an inventive device 0, wherein the intermediate container 20 during the step b) of the inventive method, that is, during the placing of the intermediate container 20 on the inner surface 51 of the

Casting 50, is shown. In particular, it is shown that the valve body 30 has a contact projection 31, which is designed to contact the inner surface 51 of the casting chamber 50. In a further lowering of the

Intermediate container 20 in the casting chamber 50 prevents the contact projection 31, that the valve body 30 is further lowered together with the remaining intermediate container 20. The valve body 30 is pressed upwards relative to the intermediate container 20. As a result, the spout opening 21 automatically becomes

released and thus opened. The melt 60 can then flow out of the likewise funnel-shaped inner volume 26 into the casting chamber 50. The possibility of arranging the intermediate container 20 over the inner surface 51 of the casting chamber 20, a drop height of the melt 60 from the spout opening 21 of the intermediate container 20 on the inner surface 51 of

Casting chamber 50 low, more preferably less than about 1 cm. As a result, leaching on the inner surface 51, which could be generated by impact of the melt 60 on the inner surface 51 at high speed, can be avoided. Fig. 3 shows an apparatus 10 according to the invention, which is completely in its final position over the inner surface 51 of

Casting chamber 50 is arranged. By contacting the contact projection 31, the valve body 30 into the interior of the inner volume 26 of the

Intermediate container 20 pushed back. The spout opening 21 is opened and the melt 60 has already flowed out of the intermediate container 20 into the casting chamber 50. Moving the intermediate container 20 upwardly and out of the casting chamber 50, the valve body 30 is moved back from its second position 34, shown in FIG. 3, back to its first position 33 (see FIGS. 1, 2), for example solely through the work of

Gravity. After removal of the intermediate container 20 from the casting chamber 50, a piston (not shown) in the casting chamber 50 itself include melt 60 in a mold (not shown) to complete the die casting process. During this pouring in of the melt 60 and / or in the further course of the pressure casting process, melt 60 can again be filled into the inner volume 26 of the intermediate container 20, whereby in particular a high cycle rate of the die-casting processes can be achieved. Overall, a device 10 according to the invention can thus be achieved that on the one hand by monitoring the filling amount of melt 60 in the inner volume 26 a constant filling of the casting chamber 50 can be ensured with melt 60 and the other by the low drop height of the melt 60 between the spout opening 21st and the inner surface 51 and damage to the casting chamber 50 can be avoided. As a result, overall costs and time can be saved when performing die-casting operations. FIGS. 4, 5 and 6 show a further possible embodiment of a device form 10 according to the invention, wherein in particular FIGS. 1 and 4, FIGS. 2 and 5 and FIGS. 3 and 6 each show the same process time of a method according to the invention. All advantages, with respect to the embodiment described in FIGS. 1, 2 and 3 a

According to the invention are described form of apparatus, thus arise analogously to the described in FIGS. 4, 5 and 6 embodiments of a device according to the invention. In the following, therefore, particular attention is paid to the differences between the two embodiments. For example, the embodiment of a device according to the invention shown in FIGS. 4, 5, 6 has a runner 24 which is fixed to the

Intermediate tank 20 is connected. This is to arrange the

Intermediate tank 20 on the inner surface 51 of the casting chamber 50, a simple common pivoting of the intermediate container 20 and the trough 24 sufficient. Such pivoting can be carried out, for example, by a shaft with a cam which acts on the runner 24 (not mitabgebildet). In addition, the intermediate container 20 is provided with a cover 28. Through this cover 28 energy losses, for example by heat radiation, the melt 60 can be reduced or even completely avoided. As a result, it can be ensured, for example, that the melt 60 in the inner volume 26 of the intermediate container 20 during the entire

Implementation of a method according to the invention remains liquid. In the lid 28, a sensor 1 1 is further arranged, which for monitoring a level 61 of Melt 60 in the internal volume 26 of the intermediate container 20 is formed. As a result, it can be ensured that a constant amount of melt 60 is present in the internal volume 26 for each execution of a method according to the invention. Furthermore, the illustrated intermediate container 20 has an overflow opening 25. In case of failure of the sensor 1 1 melt 60, when the level 61 rises above the height of the overflow opening 25, flow through this from the intermediate container 20. Also in this case can thus a

constant filling amount of melt 60 in the inner volume 26 can be ensured. An overfilling of the casting chamber 50 with too much melt 60 can be safely avoided. Also, in Figs. 4, 5 and 6 a

Storage device 23 shown in which the valve body 30 is mounted linearly movable. By an elastic element 40, in particular a spring 41, the valve body 30 is pressed in the direction of its first position 33. This can ensure that the spout opening 21 is securely closed by contacting the contact cone 32 and the valve seat ring 22. Only by contacting the contact projection 31 with the inner surface 51 of the casting chamber 50, the valve body 30 against the force of the spring 41 into the interior of the

In a subsequent removal of the intermediate container 20 from the casting chamber 50, the valve body 30 is automatically moved back into its first position 33 by the spring 41, in which the spout opening 21st is closed by the valve body 31.

In Fig. 7, three different embodiments of a closure body 27 of a device 10 according to the invention are shown. The closure body 27 is in each case formed as a valve body 30. At the end of the valve body 30 in each case a contact projection 31 is arranged, which is for contacting an inner surface 51 of a casting chamber 50 (not shown) is formed. The valve body 30 also each have a contact cone 32, the to

Contacting a valve seat ring 22 of the spout opening 21 in the intermediate container 20 (not shown) is formed and adapted to this. A particularly tight closure of the spout opening 21 (not shown) can be achieved. The three valve bodies 30 shown differ in their shape, which in each case changes an outflow behavior of melt 60 from the device 10 according to the invention. Thus, the left valve body 30 is plug-shaped. As a result, a particularly laminar outflow of the melt 60 from the spout opening 21 can be achieved. The middle one Valve body is formed plate-like at its lower end. Since the plate-like shape between the contact cone and the contact projection is arranged, this plate-like shape is in an arrangement of the

Valve body 30 in a device 10 according to the invention outside of the inner volume 26. When flowing out of the melt 60 from the inner volume 26, this impinges on the dish-shaped formation and is thus radially and thus concentrically in the casting chamber 50 (not shown) deployed. As a result, in particular a punctual impact of the melt 60 on the inner surface 51 of the casting chamber 50 can be avoided. The valve body 30 shown on the right has at its lower end a trough-like shape. This trough-shaped formation is in the assembled state of a

Device 10 according to the invention arranged outside of the inner volume 26. By such a depression at the end of the valve body 30, in particular, a sloshing of the melt 60 during filling of the melt 60 into the casting chamber 50 can be avoided. It can preferably be provided that the trough is formed omega-like. Omega-like means that the trough is open to one side. The melt 60 is thus when filling in the

Casting chamber 50 preferably flow out in the direction of the opening in the trough, whereby a preferred direction during filling of the casting chamber 50 is made possible. In particular, in the case of elongate casting chambers 50, this can be advantageous.

LIST OF REFERENCE NUMBERS

10 device

11 sensor

20 intermediate containers

21 spout opening

22 valve seat ring

23 storage device

24 runner

25 overflow opening

26 internal volume

27 closure body

28 lids

30 valve body

31 contact projection

32 contact cone

33 first position

34 Second position

40 Elastic element

41 spring

50 casting chamber

51 inner surface

52 filling opening

60 melt

61 level of the melt

Claims

claims

A device (10) for filling a melt (60) into a casting chamber (50) for diecasting, comprising an intermediate container (20) with an internal volume (26), wherein the internal volume (26) can be filled with the melt (60) .

characterized in that

the intermediate container (20) in the casting chamber (50) is reversibly arranged over an inner surface (51) of the casting chamber (50), wherein the

Intermediate container (20) has a spout opening (21) for filling the melt (60) in the casting chamber (50) and a closure body (27) for opening and closing the spout opening (21).

2. Device (10) according to claim 1,

characterized in that

the intermediate container (20) and / or the inner volume (26) are funnel-shaped.

3. Device (10) according to one of the preceding claims,

characterized in that

the closure body (27) as a valve body (30) for opening and

Closing the spout opening (21) is formed, wherein the valve body (30) in a first position (33) closes the spout opening (21) and in a second position (34) the spout opening (21) releases.

4. Device (10) according to claim 3,

characterized in that

the valve body (30) has a contact projection (31) which protrudes from the intermediate container (20), in particular from the spout opening (21), and is designed to contact the inner surface (51) of the casting chamber (50), wherein the contacting of the Valve body (30) from its first (33) can be brought into its second position (34).

5. Device (10) according to one of the preceding claims 3 or 4, characterized in that an elastic element (40), in particular a spring (41), is provided, the force of which acts on the valve body (30) in the direction of its first position (33).

6. Device (10) according to one of the preceding claims 3 to 5,

characterized in that

the valve body (30) is at least partially plug-like, plate-like or trough-like, in particular omega-shaped, is formed,

7. Device (10) according to one of the preceding claims 3 to 6,

characterized in that

a valve seat ring (22) is arranged on the spout opening (21), and in that the valve body (30) has a contact cone (32), in particular a

Contact cone (32) at an angle of about 5 °, for contacting the valve seat ring (22).

8. Device (0) according to one of the preceding claims 3 to 7,

characterized in that

the valve body (30) is mounted linearly movably in a bearing device (23).

9. Device (10) according to one of the preceding claims,

characterized in that

the intermediate container (20) is fixedly arranged on a runner (24), wherein the intermediate container (20) can be filled via the runner (24) and together with the runner (24) for placing over the inner surface (51) of the casting chamber (50) is pivotable.

10. Device (10) according to claim 9,

characterized in that

the intermediate container (20) and / or the runner (24) are formed closed.

1 1. Device (10) according to claim 10,

characterized in that the intermediate container (20) and / or the runner (24) are at least partially filled or filled with a protective gas, in particular with argon.

12. Device (10) according to one of the preceding claims,

characterized in that

the intermediate container (20) has an overflow opening (25) for limiting a level (60) of the melt (60) in the inner volume (26).

13. A method for filling a melt (60) into a casting chamber (50) for die casting by means of a device (10), in particular with the features of one of the preceding claims 1 to 12,

characterized by the following steps:

a) filling the melt (60) in an internal volume (26) of a

Intermediate container (20) of the device (10),

b) arranging the intermediate container (20) over an inner surface (51) of the casting chamber (50),

c) opening a spout opening (21) of the intermediate container (20) for filling the melt (60) in the casting chamber (50) by a

Closure body (27) of the intermediate container (20),

d) filling the melt (60) into the casting chamber (50),

e) closing the spout opening (21) through the closure body (27), and

f) moving the intermediate container (20) away from the inner surface (51).

14. The method according to claim 13,

characterized in that

in step a), a level (61) of the melt (60) in the internal volume (26) is monitored, preferably by a laser measuring method and / or an ultrasonic measuring method and / or an eddy-current method, to determine a filling quantity of the melt (60) in the internal volume (26). In particular, when determining the amount of deposits in the

Internal volume (26) are taken into account.

15. The method according to any one of the preceding claims 13 or 14,

characterized in that the intermediate container (20), in particular the inner volume (26), and / or a runner (24) is heated and / or that the intermediate container (20), in particular the inner volume (26), before step a) is cleaned.