Melt transport device with a melt container and a plug

Abstract

The invention relates to a lance (5) for a melt transport device (1). The lance (5) comprises: a connection end (20) for connecting to the melt transport device (1); a siphon (10); and a tubular flow connection section (21) extending between the connection end (20) and the siphon (10) and forming a flow connection channel (22) between the connection end (20) and the siphon (10). The lance (5) has a main part (26) and a siphon cap (27), wherein the main part (26) and the siphon cap (27) are each independent components, which are coupled to one another, wherein the siphon (10) is formed via cooperation of the main part (26) and the siphon cap (27).

Description

[0001] Melt transport device with a melt container and a plug

[0002] The invention relates to a melt transport device.

[0003] DE 102007 011 253 A1 discloses a casting device with a melt container for metallic materials. An injector is arranged on the underside of the melt container, which has an opening for discharging the melt. Furthermore, a closing device is provided, which serves to close the opening.

[0004] The casting device known from DE 10 2007 011 253 A1 has the disadvantage that the closing device can become dirty, as a result of which its tightness can no longer be guaranteed after a certain amount of use. The casting device and the casting process also have the disadvantage that the described design of the closing device means that the flow behavior and the flow velocity of the melt during casting can only be inadequately controlled. The casting device and the casting process also have the disadvantage that, due to the positioning of the closing device above the lance, the melt hits the casting mold from a great height, which can damage the mold. In addition, the great drop height can cause turbulence and thus oxide inclusions in the casting. This all leads to the production of inferior cast workpieces.

[0005] The object of the present invention was to overcome the disadvantages of the prior art and to provide a device by means of which improved cast workpieces can be produced.

[0006] This object is achieved by a device according to the claims.

[0007] In particular, a lance can be designed for a melt transport device. The lance comprises:

[0008] - a connection end for connection to the melt transport device;

[0009] - a siphon;

[0010] - a tubular flow connection section extending between the connection end and the siphon and forming a flow connection channel between the connection end and the siphon. The lance has a main part and a siphon cap, wherein the main part and the siphon cap are each independent components coupled to one another, the siphon being formed by the interaction of the main part and the siphon cap.

[0011] The lance offers the advantage that the main part and the siphon cap together form the siphon, whereby a corresponding internal geometry for forming the siphon can be easily realized by using individual components. In particular, the measures according to the invention make it possible for the individual components of the lance to be manufactured using a primary forming process, such as pressing a blank.

[0012] Furthermore, it can be expedient if the siphon cap is inseparably coupled to the main part. This has the advantage that this measure can create a melt-tight connection between the siphon cap and the main part. An inseparable connection between the main part and the siphon cap can be achieved, for example, by sintering the siphon cap and the main part together. By sintering them together, a connection created by a thread between the main part and the siphon cap can be compressed or coupled together in such a way that the individual components are inseparably coupled to one another and, moreover, fit so tightly against one another that the ingress of melt between the components is prevented.

[0013] Furthermore, it can be provided that a connecting element is formed at the connecting end of the lance.

[0014] Furthermore, it can be provided that the siphon cap is made of aluminum titanate, and that the main part is made of aluminum titanate. This has the advantage that a lance designed in this way can have sufficiently high thermal resistance for transporting melt. Furthermore, the individual aluminum titanate components can be efficiently bonded together in a single sintering process.

[0015] Furthermore, it can be provided that additional components are formed in a basic structure made of aluminum titanate. Such additional components can, for example, be mold inserts made of a different material. In an alternative embodiment, it is also conceivable for fiber materials to be embedded in the basic structure made of aluminum titanate to increase tensile strength or reduce brittleness. Such fiber materials can be, for example, glass fiber or carbon fiber.

[0016] In addition, it can be provided that the siphon cap is screwed to the main part, wherein the siphon cap and the main part are sintered together, thus forming an inseparable connection between the siphon cap and the main part. This has the advantage that this measure can create a melt-tight connection between the siphon cap and the main part. An inseparable connection between the main part and the siphon cap can be achieved, for example, by sintering the siphon cap and the main part together. By sintering them together, a connection created by means of a thread between the main part and the siphon cap can be compressed or pressed in such a way that the individual components are inseparably coupled to one another and, moreover, fit so tightly against one another that the ingress of melt between the components is prevented.In particular, melt penetration into the thread area can be prevented. Preventing melt penetration can improve the longevity of the components, since melt entering between two components would exert such a force on the components upon solidification that they would be destroyed. The measures according to the invention thus ensure that no melt can penetrate into the gaps in the thread between the siphon cap and the main part, thereby preventing damage to or bursting of the lance due to solidifying melt.

[0017] Another advantageous embodiment is one in which the siphon cap can have a siphon cap base and an adjoining siphon cap shell, with at least one through-opening formed in the siphon cap shell. This offers the advantage that the melt can escape through the through-opening. In particular, the siphon cap base and the siphon cap shell can form a pot or bowl shape.

[0018] Furthermore, it can be provided that several of the through-openings are distributed over the circumference. In particular, it can be provided that the through-openings are evenly distributed over the circumference. In particular, three of the through-openings can be evenly distributed over the circumference.

[0019] According to a further development, it is possible for the siphon cap shell to have a shell end wall on the side facing away from the siphon cap base, wherein the main part has a main part end wall, wherein the shell end wall abuts the main part end wall. This has the advantage that, due to the shell end wall abutting the main part end wall, a clear axial positioning of the siphon cap relative to the main part can be achieved. Furthermore, due to the shell end wall abutting the main part end wall, a melt-tight connection can be achieved between the siphon cap and the main part, thus preventing unwanted penetration of melt into the thread.

[0020] Furthermore, it may be expedient if a threaded section is formed on the main part, wherein the threaded section protrudes axially relative to the main part end wall, and a mating thread corresponding to the threaded section is formed on the siphon cap casing. A durable connection between the main part and the siphon cap can be established, particularly by means of such a threaded connection. In particular, the arrangement of the thread according to the invention can ensure good durability of the lance.

[0021] Furthermore, a siphon wall can be provided adjacent to the threaded section. This has the advantage that the siphon wall, together with the siphon cap, can form the siphon.

[0022] Furthermore, it can be provided that the siphon wall is formed coaxially with the siphon cap shell, with an annular gap being formed between the siphon wall and the siphon cap shell. This has the advantage that the annular gap can serve as a passage for melt. In particular, it can be provided that the annular gap is formed all the way around. In an alternative embodiment, it is also conceivable for webs to be formed on the outside of the siphon wall, so that the annular gap is designed in the form of a segmented annular gap. This can result in an increase in the strength properties.According to a particular embodiment, it is possible for the siphon to have a reservoir, wherein the reservoir is formed in the siphon cap, wherein the reservoir has an overflow level which is defined by the passage opening in the siphon cap casing, wherein the siphon wall has a siphon wall lower edge, wherein the siphon wall protrudes into the reservoir such that the siphon wall lower edge is arranged at a lower level than the overflow level. A siphon formed in this way in particular has the advantage of being simple in construction and thus easy and cost-effective to manufacture. Furthermore, such a siphon can have a robust and durable construction.

[0023] According to an advantageous development, it can be provided that the siphon cap jacket has a siphon cap outer diameter and that the main part has a main part outer diameter, wherein the siphon cap outer diameter is between 90% and 110%, in particular between 95% and 105%, preferably between 99% and 101% of the main part outer diameter. This has the advantage that the lance can have a continuous surface in the transition between the main part and the siphon cap, whereby any melt deposits at the transition between the main part and the siphon cap can be avoided. In particular, it can be provided that the main part is offset in the region of the main part end wall in such a way that this corresponds to the jacket thickness of the siphon cap jacket in order to achieve a functional part between the main part and the siphon cap in the assembled state.

[0024] In particular, it can be advantageous to have a flow guide element in the form of a centrally located protrusion on the base of the siphon cap. This has the advantage that the melt can be redirected in the area of ​​the siphon with as little turbulence as possible.

[0025] In particular, it can be provided that the flow guide element is designed in the form of a pyramid-like elevation with a rotationally symmetrical shape.

[0026] In particular, it can be provided that the main part is designed as a substantially rotationally symmetrical body. Furthermore, it can be provided that the siphon cap is designed as a substantially rotationally symmetrical body. Only the threaded sections in the main part or in the siphon cap can have a shape deviating from the rotationally symmetrical shape. Furthermore, it can be provided that the passage opening is arranged at a passage opening distance from the jacket end wall. Furthermore, it can be provided that the threaded section has a thread section length. The thread section length can be between 90% and 110%, in particular between 95% and 105%, preferably between 99% and 101% of the passage opening distance.

[0027] Furthermore, it can be provided that the distance between the lower edge of the siphon wall and the overflow level is between 100% and 1000%, in particular between 300% and 600%, preferably between 400% and 500% of the discharge height. This offers the advantage of improved flow behavior.

[0028] Furthermore, the passage opening can be inclined downwards from the horizontal at an outflow angle. The outflow angle can be between 1° and 60°, in particular between 10° and 30°, preferably between 15° and 25°.

[0029] Furthermore, it can be provided that the passage opening has a passage opening height. The passage opening height can be between 50% and 200%, in particular between 80% and 120%, preferably between 90% and 110% of the passage height.

[0030] According to the invention, a melt transport device is designed. The melt transport device comprises a melt container in which a melt receiving space is formed, and a lance coupled to the melt container, wherein the lance has a pouring opening that is fluidly connected to the melt receiving space.

[0031] Furthermore, a gas valve is provided, which is fluidly connected to the melt receiving chamber and is designed to regulate the gas input into the melt receiving chamber. The lance has a siphon. In particular, the lance is designed according to one of the above-mentioned embodiments.

[0032] Furthermore, it can be provided that a plug is formed, wherein the plug is arranged on the melt container so as to be displaceable in a plug axial direction between a closed position and an open position and serves to close an outflow cross-section in the melt container. In a closed position of the plug, a sealing surface of the plug rests against a counter-sealing surface of the melt container to tightly close the outflow cross-section. This has the advantage that this measure can prevent unwanted leakage of the melt.

[0033] In particular, tightly sealing the outlet cross-section eliminates the need to hold the melt in the melt container by negative pressure. This is particularly advantageous during dynamic movements, since the melt cannot be maintained at a constant fill level due to the compressibility of the gas during dynamic movements when the melt is held by negative pressure. Thus, the plug prevents the melt from leaking or spilling out, even during movement.

[0034] In addition, it can be provided that the plug is accommodated within the melt receiving space.

[0035] Furthermore, it can be provided that the counter sealing surface is formed on another component of the melt container, wherein the other component serves to couple the lance to the melt container. This allows the counter sealing surface to be manufactured precisely.

[0036] Furthermore, it may be advantageous for the sealing surface to have a rounded section in the area where it contacts the mating sealing surface, and for the mating sealing surface to have a chamfer, with the rounded section of the mating sealing surface contacting the chamfer in a circumferential contact line. This measure can generate high surface pressure to achieve a good sealing effect. Furthermore, this measure can minimize damage to the components. The contact line or contact surface is supported by the surrounding material.

[0037] In particular, it may be advantageous if the plug is immersed as little as possible into the outflow cross-section in order to prevent partial suction of the lance or the siphon of the lance when the plug is opened.

[0038] According to a further development, it is possible for the sealing surface to have a chamfer in the area in which it rests against the mating sealing surface and for the mating sealing surface to have a chamfer, wherein the chamfer of the sealing surface rests against the chamfer of the mating sealing surface in a conical contact surface. Furthermore, it can be expedient if the chamfer of the sealing surface has an opening angle s of between 0.1° and 45°, in particular between 0.5° and 30°, preferably between 1° and 5° to a vertical. This has the advantage of increased surface pressure and thus an improved sealing effect. In particular, this measure can enable a comparatively low axial force to lead to a comparatively high surface pressure.

[0039] Furthermore, it can be provided that the chamfer of the counter sealing surface has an opening angle s between 0.1° and 45°, in particular between 0.5° and 30°, preferably between 1° and 5° to a vertical line. This offers the advantage of increased surface pressure and thus an improved sealing effect. In particular, this measure can allow a comparatively low axial force to lead to a comparatively high surface pressure.

[0040] Furthermore, it can be provided that the plug diameter of the plug is between 100.1% and 150%, in particular between 101% and 130%, preferably between 102% and 110% of the outlet diameter of the outlet cross-section. This offers the advantage of increased surface pressure and thus an improved sealing effect. In particular, this measure can allow a comparatively low axial force to lead to a comparatively high surface pressure.

[0041] Furthermore, it can be provided that the sealing surface and / or the counter-sealing surface have a roughness depth Rz between 1.6 pm and 25 pm, in particular between 3.2 pm and 12.5 pm, preferably between 3.2 pm and 6.3 pm. This offers the advantage of an improved sealing effect.

[0042] According to a special design, the plug can have a centering section below the sealing surface, which protrudes into the outlet cross-section in the closed position. This largely prevents any damage when the plug is moved into the closed position.

[0043] In particular, it can be provided that the plug is arranged in the receiving space of the melt container and that the plug interacts with an opening of the melt container.

[0044] In an alternative embodiment, the plug can also interact with a constriction in the lance. In a further embodiment, the plug can interact with another component. This additional component can be arranged between the lance and the melt container.

[0045] In a first embodiment, the minimum outflow cross-section can be achieved by arranging longitudinal grooves in the plug or melt container, or in the additional component or lance, whereby the longitudinal grooves allow the melt to flow even in the closed position. The longitudinal grooves are designed to be at least large enough to prevent capillary action and prevent the melt from being held in the melt container by capillary action.

[0046] In a further embodiment, the minimum outflow cross-section can be achieved by positioning the plug in the closed position only close enough to the melt container, the other component, or the lance to form an annular gap that allows the melt to flow through. The annular gap is designed to be at least large enough to prevent capillary action and prevent the melt from being held in the melt container by capillary action.

[0047] The annular gap can be achieved by arranging the plug axially spaced from the counterpart component.

[0048] Alternatively, the annular gap can be achieved by having a plug with a smaller diameter than the opening in the mating component corresponding to the plug.

[0049] In particular, it may be advantageous if the plug is movably attached to the head unit by means of an actuator.

[0050] Furthermore, a method for producing a lance for a melt transport device can be provided. The method comprises the following steps:

[0051] - Providing a green body of a main part;

[0052] - Providing a green siphon cap;

[0053] - Joining the green part of the main part and the green part of the siphon cap;

[0054] - Joint sintering of the green body of the main part and the green body of the siphon cap.

[0055] The method has the advantage that the individual components of the lance can be easily manufactured. Also advantageous is a method according to which it can be provided that after the green compact of the main part has been provided, this is mechanically machined, in particular provided with a threaded section, and that after the green compact of the siphon cap has been provided, this is mechanically machined, in particular provided with a counter thread, and that in order to join the green compact of the main part and the green compact of the siphon cap, these are screwed together. This has the advantage that the green compact can be easily machined. Furthermore, the threaded connection allows the green compact of the main part to be easily connected to the green compact of the siphon cap and subsequently the two components can be sintered together in order to achieve a good connection between the two components.

[0056] For a better understanding of the invention, it is explained in more detail using the following figures.

[0057] They show in a highly simplified, schematic representation:

[0058] Fig. 1 is a schematic representation of a first embodiment of a melt transport device;

[0059] Fig. 2 is a perspective view of a first embodiment of a lance;

[0060] Fig. 3 is a longitudinal sectional view of the first embodiment of the lance;

[0061] Fig. 4 is a longitudinal sectional view of the first embodiment of a main part of the

[0062] Lance;

[0063] Fig. 5 is a longitudinal sectional view of the first embodiment of a siphon cap of the lance;

[0064] Fig. 6 is a cross-section of another embodiment of the melt transport device;

[0065] Fig. 7 is a cross-section of another embodiment of the melt transport device;

[0066] Fig. 8 shows a cross-section of another embodiment of the melt transport device with a sealing surface on the plug and a counter-sealing surface; Fig. 9 shows a cross-section of another embodiment of the melt transport device with the sealing surface in the form of a chamfer;

[0067] Fig. 10 is a cross-section of a further embodiment of the melt transport device with the counter sealing surface in the form of a counter rounding;

[0068] Fig. 11 a cross section of another embodiment of the melt transport device with a centering section on the plug.

[0069] By way of introduction, it should be noted that in the variously described embodiments, identical parts are provided with identical reference symbols or component designations. The disclosures contained throughout the description can be applied analogously to identical parts with identical reference symbols or component designations. Furthermore, the positional information chosen in the description, such as top, bottom, side, etc., refers to the directly described and illustrated figure, and these positional information must be applied analogously to the new position in the event of a change in position.

[0070] Fig. 1 shows a first embodiment of a melt transport device 1, which serves to transport melt 2.

[0071] The melt transport device 1 has a melt container 3 in which a melt receiving space 4 is formed, which serves to receive the melt 2.

[0072] Furthermore, the melt transport device 1 can comprise a lance 5, which is coupled to the melt container 3. The lance 5 can be interchangeably coupled to the melt container 3. In particular, it is conceivable for the lance 5 to be designed as a separate component, which is coupled to the melt container 3. The lance 5 has a pouring opening 6, through which the melt 2 held in the melt container 3 can flow out of the melt transport device 1 into a casting mold.

[0073] Furthermore, a gas valve 7 can be formed, which is fluidly connected to the melt receiving space 4 and which is designed to regulate a gas input into the melt receiving space 4.

[0074] Furthermore, it can be provided that a suction line 8 is formed, which can be coupled to a vacuum pump 9. The gas valve 7 can also be arranged in the region of the suction line 8 or be designed to allow gas to flow into the melt receiving chamber 4 in a targeted manner via the suction line 8.

[0075] As can be further seen from Fig. 1, it can be provided that the melt transport device 1 has a siphon 10.

[0076] The siphon 10 can be arranged between the melt receiving space 4 and the pouring opening 6.

[0077] In particular, it can be provided that the siphon 10 is arranged on the underside of the lance 5.

[0078] Furthermore, it can be provided that a bottom flange 11 is formed, which can be welded to a casing 12 of the melt container 3. In particular, it can be provided that the bottom flange 11 is designed to receive a bottom cover 13. In particular, it can be provided that the bottom cover 13 is coupled to the bottom flange 11 by means of fastening means 14. Such fastening means 14 can be designed, for example, in the form of screws. In particular, it can be provided that a hole pattern in the form of through holes 15 is formed in both the bottom flange 11 and the bottom cover 13, which serve for the insertion of the fastening means 14.

[0079] Furthermore, it can be provided that a central recess 16 is formed in the base cover 13, which can serve as a passage for the melt 2. In particular, it can be provided that the lance 5 corresponds to the central recess 16 or is received therein. Furthermore, it can be provided that the lance 5 has a connecting element 17, which can be received in a depression 18 of the central recess 16. The connecting element 17 can bear against a contact surface 19 of the base cover 13. Thus, the lance 5 can be received in the base cover 13 in a form-fitting manner.

[0080] Figures 2 and 3 show a further and possibly independent embodiment of the lance 5, wherein the same reference numerals or component designations as in the previous Fig. 1 are used for the same parts. To avoid unnecessary repetition, reference is made to the detailed description in the previous Fig. 1. As can also be seen from Fig. 1, it can be provided that a plug 57 is formed, which can serve to reduce an outflow cross-section 60 in the melt container 3. In particular, it can be provided that the plug 57 is designed to be displaceable in a plug axial direction 58 relative to the melt container 3. The plug 57 can be displaceable in the plug axial direction 58 by means of an actuator 59. In the illustration according to Fig. 1, the plug 57 is shown in its closed position. As can be seen from Fig.As can be seen in Figure 1, an outflow cross-section 60 in the form of an annular gap can remain when the plug 57 is closed. The annular gap can be achieved by making the inner diameter of the melt container 3 in the area of ​​the outlet smaller than the outer diameter of the plug 57.

[0081] Fig. 2 shows the lance 5 in a perspective view. Fig. 3 shows the lance 5 in a longitudinal section. The structure of the lance 5 is described below using a combined view of Figures 2 and 3.

[0082] As can be seen from Figs. 2 and 3, the lance 5 can extend between a connection end 20 and the siphon 10. In particular, the connection element 17 can be formed at the connection end 20. The connection element 17 can, for example, be designed in the form of a collar or a flange.

[0083] Furthermore, it can be provided that a flow connection section 21 is formed between the connection end 20 and the siphon 10. The flow connection section 21 can form a flow connection channel 22. The flow connection channel 22 can serve to guide the melt 2. Furthermore, it can be provided that a tapered section 23 is formed between the flow connection section 21 and the connection end 20. This measure can achieve an inflow diameter 24 in the region of the connection end 20 that can be larger than a connection channel diameter 25 of the flow connection channel 22. This can result in improved inflow behavior into the lance 5.

[0084] As further evident from Figs. 2 and 3, the lance 5 can be provided with a main part 26 and a siphon cap 27. The main part 26 and the siphon cap 27 can be designed as structurally independent parts that are coupled to one another. In particular, the main part 26 and the siphon cap 27 can be inseparably coupled to one another. Furthermore, the siphon 10 can be formed by the interaction of the main part 26 with the siphon cap 27.

[0085] As further evident from Fig. 3, it can be provided that the flow connection section 21 is formed in the main part 26. Furthermore, it can be provided that the connection end 20 is formed in the main part 26. The main part 26 can have a main part outer diameter 28 in the region of the flow connection section 21. A flow connection section wall thickness 29 can result from the difference between the main part outer diameter 28 and the connecting channel diameter 25.

[0086] In particular, it can be provided that the flow connection section 21 is tubular.

[0087] As can be seen from Fig. 3, the siphon cap 27 can be provided with a siphon cap base 30 and a siphon cap shell 31. The siphon cap shell

[0088] 31 can be formed integrally with the siphon cap base 30. This can result in a pot-shaped structure or shape of the siphon cap 27.

[0089] Furthermore, it can be provided that a passage opening 32 is formed in the siphon cap casing 31. The passage opening 32 can serve to direct the melt 2 flowing in the flow connection channel 22 to the outside. In particular, it can be provided that the pouring opening 6 is formed in the passage opening 32.

[0090] As can be seen from Fig. 3, it can be provided that the siphon cap 27 forms a reservoir 33, which serves to hold the melt 2. Furthermore, it can be provided that a siphon wall 34 is formed in the main part 26 adjacent to the flow connection section 21. The siphon wall 34 can also be tubular. Furthermore, it can be provided that the siphon wall 34 has a siphon wall lower edge 35. In particular, it can be provided that the siphon wall 34 protrudes into the reservoir 33. The reservoir 33 can be increased in its capacity upwards by the passage opening

[0091] 32. In particular, it can be provided that an overflow level 36 is defined by the passage opening 32, wherein when the melt 2 rises above the overflow level 36, the melt 2 can flow outward through the passage opening 32. In particular, it can be provided that a lower edge of the passage opening 32 forms the overflow level 36. In particular, it can be provided that the lower edge 35 of the siphon wall is arranged below the overflow level 36, whereby the siphon effect can be achieved.

[0092] Furthermore, it can be provided that the siphon wall 34 has an outer siphon wall diameter 37. The siphon wall 34 can be designed such that the connecting channel diameter 25 or the flow connection channel 22 extends through the siphon wall 34. Thus, the siphon wall 34 can have a connecting channel diameter 25 on its inner side.

[0093] The siphon wall 34 can have a siphon wall thickness 38, which results from a difference between the siphon wall outer diameter 37 and the connecting channel diameter 25.

[0094] In particular, it can be provided that the siphon wall outer diameter 37 is smaller than the main part outer diameter 28. A threaded section 39 can be formed in the upper region of the siphon wall 34 or in the region of the connection of the siphon wall 34 to the flow connection section 21. The threaded section 39 can have an external thread. In particular, it can be provided that the threaded section 39 has a thread diameter 40. The thread diameter 40 can be smaller than the main part outer diameter 28. Furthermore, it can be provided that the thread diameter 40 is larger than the siphon wall outer diameter 37. Furthermore, it can be provided that a relief cut 41 is formed between the threaded section 39 and the flow connection section 21.

[0095] Because the thread diameter 40 can be smaller than the main part outer diameter 28, a step can be formed on the underside of the flow connection section 21. The step can have a main part end wall 42. In particular, it can be provided that the undercut 41 extends between the main part end wall 42 and in the threaded section 39. Furthermore, it can be provided that the siphon cap jacket 31 has a jacket end wall 43 on its upper side. In particular, it can be provided that the jacket end wall 43 rests against the main part end wall 42. In this way, an axial positioning of the siphon cap 27 can be achieved. Furthermore, it can be provided that the passage opening 32 is formed at an axial distance from the jacket end wall 43. In particular, it can be provided that the passage opening 32 is arranged at a distance 44 from the jacket end wall 43.Furthermore, it can be provided that the threaded section 39 has a threaded section length 45. The threaded section length 45 and the through-opening spacing 44 can be approximately equal.

[0096] Furthermore, it can be provided that a counter thread 46 is formed in the siphon cap casing 31 of the siphon cap 27, which corresponds to the threaded portion 39. The counter thread 46 can be designed as an internal thread, which can also have the thread diameter 40.

[0097] Furthermore, it can be provided that the mating thread 46 has a mating thread section length 47. The mating thread section length 47 can be approximately the same as the thread section length 45 or the passage opening distance 44. Furthermore, it can be provided that the siphon cap 27 has a siphon cap outer diameter 48 and a siphon cap inner diameter 49 in the region of the siphon cap jacket 31. In particular, it can be provided that the siphon cap outer diameter 48 is approximately the same size as the main part outer diameter 28. Thus, a continuously variable outer shell of the lance 5 can be formed. Furthermore, it can be provided that the siphon cap inner diameter 49 is larger than the thread diameter 40. In particular, it can be provided that the siphon cap inner diameter 49 is larger than the siphon wall outer diameter 37.An annular gap 50 can be formed by the difference between the siphon cap inner diameter 49 and the siphon wall outer diameter 37. The annular gap 50 can have an annular gap width 51. The annular gap 50 can form part of the reservoir 33. Furthermore, the annular gap 50 can serve to connect the flow connection channel 22 to the passage opening 32 in the siphon cap casing 31.

[0098] As further evident from Fig. 3, a flow guide element 52 can be formed on an inner surface 53 of the siphon cap base 30. The flow guide element 52 can extend to a level of the lower edge 35 of the siphon wall.

[0099] Furthermore, it can be provided that the siphon cap base 30 has a siphon cap base inner surface 53. The flow guide element 52 can be arranged on the siphon cap base inner surface 53. Furthermore, it can be provided that the

[0100] Siphon cap bottom inner surface 53 is arranged at a passage height 54 to the siphon wall lower edge 35.

[0101] In Fig. 4, the main part 26 of the lance 5 is shown in a longitudinal section, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figures 1 to 3. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 3.

[0102] In Fig. 5, the siphon cap 27 of the lance 5 is shown in a longitudinal section, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figures 1 to 3. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 3.

[0103] As can be seen particularly clearly in Fig. 5, the passage opening 32 can be provided not to penetrate the siphon cap casing 31 straight, but rather to be inclined downwards at an outflow angle 55 from the horizontal. This measure can achieve improved flow behavior when the melt flows into a casting mold. Furthermore, the passage opening 32 can be provided with a passage opening height 56.

[0104] In Fig. 6, the melt transport device 1 is shown in a cross-sectional view, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figures 1 to 5. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 5.

[0105] As can be seen from Fig. 6, it can be provided that a further component 61 is arranged between the melt container 3 and the lance 5. For the sake of clarity, the further component 61 is shown in perspective in a detailed view in Fig. 6.

[0106] The additional component 61 can be annular. Furthermore, it can be provided that the additional component 61 has an inner surface 62 into which the plug 57 extends. The inner surface 62 can thus correspond with the plug 57. Furthermore, it can be provided that longitudinal grooves 63 are formed on the inner surface 62, which form the outflow cross-section 60.

[0107] In Fig. 7, the melt transport device 1 is shown in a cross-sectional view, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 6. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 6.

[0108] As can be seen from Fig. 7, it can be provided that the plug 57 is arranged at a distance from the melt container 3 in the closed position, so that the outflow cross-section 60 is obtained.

[0109] Fig. 8 shows a further embodiment of the melt transport device 1 in a cross-sectional view, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 7. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 7.

[0110] As can be seen from Fig. 8, it can be provided that the plug 57 is arranged on the melt container 3 so as to be displaceable in the plug axial direction 58 between a closed position 64 and an open position 65. In the closed position 64, a sealing surface 66 of the plug 57 can bear against a counter-sealing surface 67 of the melt container 3. In particular, it can be provided that the sealing surface 66 has a rounded portion 68.

[0111] The rounded portion 68 of the sealing surface 66 may abut a chamfer 69 of the counter-sealing surface 67. This may result in a circumferential contact line.

[0112] As can be further seen from Fig. 8, it can be provided that a plug diameter 72 of the plug 57 is larger than an outflow diameter 73 of the outflow cross-section 60.

[0113] Figures 9 to 11 each show further detailed views of embodiments of the melt transport device 1 in a cross-sectional view, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figures 1 to 8. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 8.

[0114] As can be seen from Fig. 9, it can be provided that the sealing surface 66 has a chamfer 70 in the region in which it rests against the counter-sealing surface 67, and the counter-sealing surface 67 has a chamfer 69. In the closed position 64, the chamfer 70 of the sealing surface 66 can rest against the chamfer 69 of the counter-sealing surface 67 in a conical contact surface. The chamfer 70 of the sealing surface 66 can have an opening angle 71.

[0115] As can be seen from Fig. 10, it can be provided that the counter sealing surface 67 has a counter rounding 75 corresponding to the rounding 68 of the sealing surface 66.

[0116] As can be seen from Fig. 11, the plug 57 can be provided with a centering section 74 below the sealing surface 66, which protrudes into the outflow cross-section 60 in the closed position 64. The centering section 74 can adjoin the chamfer 70 of the sealing surface 66.

[0117] In an embodiment not shown, in a further development of Fig. 10, the centering section 74 can also connect to the rounding 68 of the sealing surface 66.

[0118] The embodiments show possible embodiments, whereby it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments with each other are also possible and this possibility of variation lies within the skill of the person skilled in the art in this technical field due to the teaching of technical action by means of the objective invention.

[0119] The scope of protection is determined by the claims. However, the description and drawings must be used to interpret the claims. Individual features or combinations of features from the various embodiments shown and described may represent independent inventive solutions. The problem underlying these independent inventive solutions can be derived from the description.

[0120] All information on value ranges in this description is to be understood as including any and all sub-ranges thereof, e.g. the information 1 to 10 is to be understood as including all sub-ranges starting from the lower limit of 1 and the upper limit of 10, ie all sub-ranges begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

[0121] For the sake of clarity, it should finally be pointed out that, in order to better understand the structure, some elements have been shown out of scale and / or enlarged and / or reduced in size.

[0122] Reference symbol list

[0123] Melt transport device 29 Flow connection section Melt wall thickness

[0124] Melt container 30 S siphon cap base

[0125] Melt receiving chamber 31 Siphon cap jacket

[0126] Lance 32 passage opening

[0127] Pouring opening 33 Reservoir gas valve 34 Siphon wall

[0128] Suction line 35 siphon wall bottom edge

[0129] Vacuum pump 36 overflow level

[0130] Siphon 37 siphon wall outer diameter

[0131] Floor flange 38 siphon wall thickness

[0132] Jacket 39 threaded section

[0133] Bottom cover 40 thread diameter

[0134] Fasteners 41 Undercut through hole 42 Main part end wall central recess 43 Shell end wall

[0135] Connection element 44 passage opening s distance

[0136] Recess 45 Thread section length contact surface 46 Counter thread connection end 47 Counter thread section length

[0137] Flow connection section 48 Siphon cap outer diameter

[0138] Flow connection channel 49 Siphon cap inner diameter tapered section 50 Annular gap inflow diameter 51 Annular gap width

[0139] Connection channel diameter 52 Flow guide element main part 53 Siphon cap bottom inner surface

[0140] Siphon cap 54 passage height

[0141] Main part outer diameter 55 Outflow angle

[0142] 56 Passage opening height plug

[0143] Plug axial direction

[0144] Actuator

[0145] From the flow cross-section of another component

[0146] Inner surface of another component

[0147] Longitudinal groove

[0148] Closed position

[0149] Disclosure

[0150] Sealing surface

[0151] Counter sealing surface

[0152] Rounding

[0153] Chamfer counter sealing surface

[0154] Chamfer sealing surface

[0155] Opening angle

[0156] Plug diameter

[0157] From flow diameter

[0158] Centering section

[0159] Counter-rounding

Claims

Patent claims 1. Melt transport device (1) comprising a melt container (3) in which a melt receiving space (4) is formed and a lance (5) which is coupled to the melt container (3), wherein the lance (5) has a pouring opening (6) which is fluidly connected to the melt receiving space (4), wherein a gas valve (7) is formed which is flow-connected to the melt receiving space (4) and which is designed to regulate a gas input into the melt receiving space (4), characterized in that the lance (5) has a siphon (10).

2. Melt transport device (1) according to claim 1, characterized in that a plug (57) is formed, wherein the plug (57) is arranged on the melt container (3) so as to be displaceable in a plug axial direction (58) between a closed position (64) and an open position (65) and serves to close an outflow cross-section (60) in the melt container (3), wherein in a closed position (64) of the plug (57) a sealing surface (66) of the plug (57) rests against a counter-sealing surface (67) of the melt container (3) in order to tightly close the outflow cross-section (60).

3. Melt transport device (1) according to claim 1 or 2, characterized in that the plug (57) is accommodated within the melt receiving space (4).

4. Melt transport device (1) according to one of claims 1 to 3, characterized in that the counter sealing surface (67) is formed on a further component (61) of the melt container (3), wherein the further component (61) serves to couple the lance (5) to the melt container (3).

5. Melt transport device (1) according to one of claims 1 to 4, characterized in that the sealing surface (66) has a rounding (68) in the area in which it rests on the counter-sealing surface (67) and the counter-sealing surface (67) has a chamfer (69), wherein the rounding (68) of the counter-sealing surface (67) rests on the chamfer (69) in a circumferential contact line.

6. Melt transport device (1) according to one of claims 1 to 5, characterized in that the sealing surface (66) has a chamfer (70) in the area in which it rests on the counter-sealing surface (67) and the counter-sealing surface (67) has a chamfer (69), wherein the chamfer (70) of the sealing surface (66) rests in a conical contact surface on the chamfer (69) of the counter-sealing surface (67).

7. Melt transport device (1) according to claim 6, characterized in that the chamfer (70) of the sealing surface (66) has an opening angle (71) between 0.1° and 45°, in particular between 0.5° and 30°, preferably between 1° and 5° to a vertical.

8. Melt transport device (1) according to one of claims 1 to 7, characterized in that a plug diameter (72) of the plug (57) is between 100.1% and 150%, in particular between 101% and 130%, preferably between 102% and 110% of an outflow diameter (73) of the outflow cross-section (60).

9. Melt transport device (1) according to one of claims 1 to 8, characterized in that the sealing surface (66) and / or the counter-sealing surface (67) has a roughness depth Rz between 1.6pm and 25pm, in particular between 3.2pm and 12.5pm, preferably between 3.2pm and 6.3pm.

10. Melt transport device (1) according to one of claims 1 to 9, characterized in that the plug (57) has a centering section (74) below the sealing surface (66) which projects into the outflow cross-section (60) in the closed position (64).

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