Low pressure casting method and low pressure casting device

Abstract

The invention relates to a die casting method, in particular low pressure die casting method, comprising, preferably in the given order: Holding (120) molten metal (6) in at least one holding furnace (8); Transferring (140) the molten metal (6) from the at least one holding furnace (8) through a gating system (11) at least partly into at least one casting mold (4) for at least partly filling the casting mold (4). The invention also relates to a Die casting device, in particular low pressure die casting device comprising: at least one mold (4) for casting components out of molten metal (6); wherein the at least one mold (4) comprises constricted areas (24); at least one holding furnace (8) for holding the molten metal (6); a gating system (11) for connecting the at least one mold (4) to the at least one holding furnace (8); and preferably at least one pressure control system (20) for providing pressure to the molten metal (6) in the at least one holding furnace (8) for transferring the molten metal (6) through the gating system (11) at least partly into the at least one casting mold (4), wherein the pressure preferably is gradually increased during a casting cycle.

Description

[0001] January 16, 2026

[0002] Casting method and Casting device

[0003] The invention relates to a casting method, in particular a low pressure die casting method, comprising, preferably in the given order: Holding molten metal in at least one holding furnace; Transferring the molten metal from the at least one holding furnace through a gating system at least partly into at least one casting mold. The invention also relates to a casting device, in particular a low pressure die casting device, preferably for performing an aforementioned casting method, comprising: at least one mold for casting components out of molten metal; wherein the at least one mold comprises constricted areas; at least one holding furnace for holding the molten metal; and a gating system for connecting the at least one mold to at least one holding furnace.

[0004] Usually, the casting mold or mold is placed at, or above, the level of the metal being poured. In sealed systems for LPDC, a furnace, also named holding furnace, that can be sealed and pressurized, is used to maintain the molten metal at a constant temperature and composition until it is ready to be injected into the mold. Before filling the molten metal into the holding furnace, the desired metal or metal alloy from which a cast component will be produced may be melted in a separate furnace, i.e., the melting furnace, ensuring it has the correct temperature and composition for casting.

[0005] In the holding furnace, usually one or more hollow tubes connect the top (outlet) of the furnace and extend down into the molten metal. The mold usually is placed on top of the furnace, the melt in the furnace is pressured and the molten metal is forced up through the at least one or more hollow tubes and through a gating system into the mold. The one or more hollow tubes may also be referred to as stalks, riser tubes, sprues or runners and may also be regarded as part of a gating system, optionally among further parts as for examples gates.Low-pressure casting is mainly used for the manufacture of complex, high-quality components such as aluminum alloy engine blocks and suspension components for cars, cylinder heads, aluminum wheels, heat sinks for electronic components, pump housings, and / or impellers. Low-pressure casting is a favored manufacturing technique across various industries, notably automotive and aerospace, and widely used for the casting of components which require good integrity and good appearance when finely machined or polished. This is because the slow, substantially turbulence-free entry of liquid metal into the mold at the relatively low pressures used in low pressure die casting reduces porosity due to trapped gasses and solidification shrinkage. This controlled process also allows for the production of complex geometries, including relatively thin walls and intricate details.

[0006] In addition to the benefits of pressurized mold filling, low-pressure casting dies usually contain integral cooling passages that aid in controlled cooling, further enhancing mechanical properties. Commonly used materials for LPDC are, among others, aluminum (Al), magnesium (Mg), copper (Cu) or Zinc (Zn) or alloys of the mentioned metals.

[0007] Producing a casting part by low pressure die casting typically starts with melting the metal alloy from which the component is to be cast in a furnace. Heating continues until the metal alloy reaches the appropriate temperature for casting. The appropriate temperature for casting depends on various factors. One factor naturally is the melting point of the specific alloy composition being used.

[0008] Once the molten metal reaches the appropriate casting temperature, it is transferred to a holding furnace, which is usually positioned beneath the mold. This holding furnace helps maintain the molten metal at the required temperature and ensures a continuous supply of material to the mold for the casting process.

[0009] HF / HF 241420WO 16 January 2026For casting the component in the mold, the molten metal held in the holding furnace must first be transported to the exit or outlet of the holding furnace. Typically, the holding furnace is connected to the casting mold via at least one riser tube, which in turn is connected to a gating system, which connects the at least one riser tube to the entry or gates of the casting mold or mold cavity. Further, a sprue, which is a passage or channel through which the molten metal flows into the casting mold and typically is a part of the gating system, may be positioned at the end of the gating system and at the entry to the casting mold.

[0010] During pressurization, the molten metal in the holding furnace may initially be forced through a riser and a system of tubes called gating system guiding the molten metal to the entry of the casting mold using low pressure, for example a pressure below 0,8 bar. Subsequently the casting mold is filled with the molten metal, wherein the pressure may be gradually increased. Finally, the pressure may be held for a certain time until the component to be cast is solidified.

[0011] The casting mold may be a permanent mold or a sand mold or a core package.

[0012] The velocity of the molten metal in the mold depends on the pressure asserted on the molten metal and the volume to be filled by the molten metal. The gradually increasing pressure asserted on the molten metal which is introduced into the mold leads to the velocity of the molten metal increasing in narrow or constricted areas of the mold. This may lead to increased turbulence in these areas which may cause increased oxide formation and a thus reduced quality of the cast part.

[0013] Alternatively, a gravity casting method may be used for producing a cast part in which the molten metal is transferred from a holding furnace through a gating system into a casting mold by gravity. Typically, the holding furnace is arranged above the casting mold. For the gravity casting method likewise, the velocity of the molten metal increases in narrow or constricted areas of the mold. This may lead to increased

[0014] HF / HF 241420WO 16 January 2026turbulence in these areas which may cause increased oxide formation and a thus reduced quality of the cast part.

[0015] Conventional approaches trying to mitigate aforementioned problems typically rely on complex pressure control mechanisms and / or the use of large feeders connected to the mold. However, such methods can be technically demanding, consume more material, and thus increase energy requirements, making them less efficient for modern manufacturing methods.

[0016] Therefore, the present invention is faced with the problem of providing an improved casting method and a corresponding casting device, which enable beneficial quality cast parts in a cost-effective manner.

[0017] According to a first aspect of the present invention, said problem is solved by an aforementioned casting method, wherein the velocity of the molten metal in constricted areas of the at least one mold during the filling of the at least one mold is reduced by at least one feeder, wherein the at least one feeder is connected to the gating system.

[0018] By using the at least one feeder, the flow of the molten metal in the casting may use the way of the least resistance in case constricted areas of the at least one mold are filled with the molten metal. Thus, the velocity of the molten metal may be reduced when filling the constricted areas of the at least one mold since the pressurized molten metal may at least partly also flow into the at least one feeder. The at least one feeder may cause a damper effect of the molten metal flowing into the mold, in particular when constricted areas of the at least one mold are filled with the molten metal. Preferably, the feeder is filled substantially simultaneously with the at least one mold. The at least one feeder may also be regarded as at least one damper.

[0019] HF / HF 241420WO 16 January 2026By reducing the velocity of the molten metal in the constricted areas of the mold, turbulences may be minimized, and the formation of undesirable aluminum oxides caused by splashing may be prevented or at least reduced.

[0020] Further, a filling of the mold in a controlled, steady manner may be enabled, wherein the molten metal may progress predominantly in a laminar flow without significant turbulence, in particular all the way up to the uppermost part of the mold.

[0021] Preferably, the level of the molten metal in the at least one feeder is higher than the level of the molten metal in the at least one mold during the filling of the constricted areas of the at least one mold.

[0022] The term constricted areas in particular refer to areas of the mold, in which the crosssection of the area narrows or becomes more geometrically complex compared to the rest of mold, which may lead to an increase of the specific flow resistance of the molten metal during the filling process of the mold.

[0023] For example, the constricted areas are areas where the cross-sectional area is 30%, in particular 20%, preferably 10% or less of the cross-sectional area of the widest part of the mold.

[0024] According to a preferred embodiment, the molten metal level in the at least one feeder increases for reducing the velocity of the molten metal in constricted areas of the at least one mold during the filling of the at least one mold. Hereby, the flow of the molten metal in the mold may be diverted. By providing an alternative path via the at least one feeder, the molten metal at least partly flows to the at least one feeder when encountering constricted areas, whereby the velocity of the molten metal in such areas may be reduced. The at least one feeder may act as a dynamic buffer, wherein the level of molten metal in the feeder may be adjusted according to the filling conditions of the mold, thereby preferably maintaining a stable and controlled filling process without the need of a complicated pressure control algorithm.

[0025] HF / HF 241420WO 16 January 2026Preferably, the molten metal level in the at least one feeder in particular increases to a higher level compared to the molten metal level in the at least one mold for reducing the velocity of the molten metal in the constricted areas of the at least one mold during the filling of the at least one mold.

[0026] According to a preferred embodiment, the molten metal level in the at least one feeder decreases once the constricted areas of the at least one mold are at least partly filled with molten metal. This may lead to an additional pressure being provided by the molten metal of the feeder in addition to the pressure or gravitational force exercised on the molten metal in the at least one holding furnace, in particular when the molten metal is introduced into areas of the at least one mold which are not constricted. The at least one feeder may therefore act as a pressure-balancing mechanism. In particular, this may result in a flat mold without requiring overflow systems, as the feeder may be positioned and / or extend to a higher level than the mold itself.

[0027] Preferably, the molten metal may be fed to the cavity via the at gating system from below which may reduce the static pressure exerted on the molten metal and the solidifying cast part. This may minimize the penetration of molten aluminum into cores, in particular into sand cores or into a sand mold. This reduction in penetration may improve the surface quality of the casting, which may eliminate the need for postcasting treatments such as sandblasting to achieve a smooth and refined finish.

[0028] Preferably, wherein the molten metal level in the at least one feeder in particular decreases to an at least equal or a lower level compared to the molten metal level in the at least one mold once the constricted areas of the at least one mold are at least partly filled with the molten metal.

[0029] Furthermore, it is preferred that the molten metal flows from the at least one feeder into the at least one mold. Hereby, the pressure exerted to the molten metal may be increased, in particular when areas of the mold are filled which are not constricted.

[0030] HF / HF 241420WO 16 January 2026According to a preferred embodiment, the at least one feeder is indirectly connected to the at least one mold via the gating system. By connecting the at least one feeder directly to the gating system, the molten metal stemming from the gating system may directly flow to the at least one feeder from the gating system if the internal resistance in the at least one mold increases due to a filling of constricted areas of the at least one mold. Hereby, an efficient casting method may be provided which comprises beneficial flow characteristics. Also, this may enable a space-saving design of the at least one feeder as it may be located laterally to the at least one mold and may for example also be used for another mold in parallel.

[0031] According to another embodiment, the casting method further comprises:

[0032] Pressurizing the molten metal in the at least one holding furnace to transfer the molten metal from the at least one holding furnace through the gating system at least partly into the at least one casting mold, wherein the pressure preferably is gradually increased during a casting cycle. The pressurizing of the molten metal in the at least one holding furnace may be performed by pressurization with nitrogen. If the holding furnace is gradually getting emptier, the asserted pressure may be gradually increased.

[0033] According to a preferred embodiment, the at least one mold and / or the at least one feeder are filled via the gating system from below. By feeding from below, the molten metal rises in a controlled manner, ensuring more uniform filling of the mold cavity, especially in constricted areas, where flow resistance is typically higher.

[0034] According to a preferred embodiment, the casting method further comprises:

[0035] Solidifying the molten metal provided into the at least one mold substantially unidirectionally, wherein the molten metal in the vicinity of the gating system preferably solidifies last. A unidirectional solidification enables that the molten metal may solidify in a way that minimizes internal stresses and shrinkage, improving the overall structural integrity of the casting. This in particular may be enabled via the at

[0036] HF / HF 241420WO 16 January 2026least one feeder. In particular, the molten metal in the vicinity solidifies last as hot molten metal may be further provided via the gating system and via the at least one feeder connected to the gating system. By solidifying last, a continuous supply of molten metal to the mold may be provided, thereby preventing, or at least reducing shrinkage defects.

[0037] According to another embodiment, the velocity of the molten metal in the mold does not exceed 1 m / s, in particular 0.8 m / s. This velocity may further optimize the casting method, as it may further ensure that the molten metal fills the mold in a smooth and stable manner, reducing the risk of turbulence and defects.

[0038] The aforementioned velocity of the molten metal may minimize the formation of undesirable phenomena such as splashing and oxidation, which may lead to the inclusion of aluminum oxides in the casting and thus degrade the final product’s quality.

[0039] Moreover, a lower flow velocity may enhance the ability to control the filling process, especially in intricate or constricted areas of the mold. Slower flow allows for a more even distribution of molten metal and helps in maintaining a laminar flow of the molten metal, further improving the quality of the cast part.

[0040] According to another embodiment, the gating system and the at least one feeder are arranged in a serial connection. This means that the molten metal from the at least one heating furnace must flow through both the gating system and the at least one feeder in order to reach the at least one mold. This may enable a beneficial flow control and lead to a reduced space of the casting device.

[0041] According to a second aspect of the present invention, said problem is solved by an aforementioned casting device, wherein the at least one feeder is connected via the gating system to the at least one mold for reducing the velocity of the molten metal in the constricted areas during the filling on the at least one mold.

[0042] HF / HF 241420WO 16 January 2026The advantages, technical effects and embodiments described above for the casting method according to the first aspect of the present invention apply correspondingly also to the casting device according to the second aspect of the invention or an embodiment thereof.

[0043] According to another embodiment, the at least one feeder extends above the at least one mold. Hereby, it may be ensured that the molten metal level of the feeder reliably may be above the molten metal level in the mold if construed areas of the at least one mold are filled. Also, an additional pressure can be exerted on the molten metal in the mold in addition to the pressure applied on the molten metal in the at least one holding furnace, in particular, when the molten metal is introduced into areas of the mold which are not constricted. Extending the at least one feeder above the at least one mold may therefore reliably enable the at least one feeder to act as a pressurebalancing mechanism and provide a damper effect for the introduction of the molten metal into the mold.

[0044] According to another embodiment, the casting device further comprises at least one pressure control system for providing pressure to the molten metal in the at least one holding furnace for transferring the molten metal through the gating system at least partly into the at least one casting mold, wherein the pressure preferably is gradually increased during a casting cycle.

[0045] According to another embodiment, the at least one gating system is at least partly arranged below the at least one mold and / or below the at least one feeder. This may reduce the static pressure exerted on the molten metal and the solidifying cast parts. This may minimize the penetration of molten aluminum into cores, in particular into sand cores. This reduction in penetration may improve the surface quality of the casting, which may eliminate the need for post-casting treatments such as sandblasting to achieve a smooth and refined finish.

[0046] HF / HF 241420WO 16 January 2026According to another embodiment, the casting device comprises at least two molds for casting at least two cast components in one cast cycle, wherein the at least one feeder, in particular exactly one feeder, is connected via the gating system with the at least two molds. Due to the feeder being connected via the gating system with the molds, in particular no additional feeders may be needed, and the total feeder volume may be reduced in size. Thus, existing casting devices may be designed as double mold or double cavity devices so that the productivity of the casting device may be significantly increased while using substantially the same construction space.

[0047] According to another preferred embodiment, the ratio of the capacity of the at least one feeder to the capacity of the at least one mold is below 1:2, in particular below 1:5, preferably below 1:10. The capacity of the at least one feeder and the capacity of the at least one mold in particular is the internal volume of the at least one feeder and the at least one mold which is capable of receiving molten metal. It has been realized that due to the feeder acting as a damper only a relatively small capacity of the feeder is required. Hereby, a small casting device may be provided and in particular a small feeder may be used which only consumes a small amount of molten metal which is not used for the cast part itself. Thus, the casting device is also beneficial with regard to the costs and the consumed energy.

[0048] According to another preferred embodiment, at least one cooling plate is arranged, in particular is arranged directly, on top of the at least one mold. Due to the reduced size of the at least one feeder, a cooling plate may be arranged directly in the vicinity of the at least one mold. This may further enhance the quality of the cast part.

[0049] According to another preferred embodiment, the at least one gating system extends above the at least one feeder. This is in particular beneficial if the casting device is a gravity casting device.

[0050] HF / HF 241420WO 16 January 2026Further advantageous exemplary embodiments of the invention are indicated by the following detailed description of a number of practical examples of the present invention, in particular in connection with the figures.

[0051] The figures attached to the application, however, are only intended to be used for the purpose of clarification, and not to determine the scope of protection of the invention. The attached figures are intended only as examples reflecting the general concept of the present invention. In particular, features shown in the figures should not in any way be considered an essential component part of the invention.

[0052] In the following, the invention will be described in more detail with reference to the figures.

[0053] Fig. 1 shows an exemplary embodiment of a casting method;

[0054] Fig. 2a shows an exemplary embodiment of a casting device in a schematic view; and

[0055] Fig. 2b shows another exemplary embodiment of a casting device in a schematic view.

[0056] Fig. 1 shows an exemplary embodiment of a casting method.

[0057] In a first step 100, the metal is melted in a melting furnace. The molten metal is introduced into a holding furnace and held in the holding furnace in step 120. In step 140, the molten metal in the holding furnace is pressurized and successively transferred from the at least one holding furnace through a gating system at least partly into at least one casting mold.

[0058] During a filling step 160 of the molten metal, the velocity of the molten metal in constricted areas of the at least one mold is reduced by the at least one feeder,

[0059] HF / HF 241420WO 16 January 2026wherein the at least one feeder provides a damping effect with regard to the velocity of the molten metal.

[0060] During and after the transportation step 160, the molten metal in the at least one mold solidifies, in particular unidirectionally in a solidification step 180. Preferably, the molten metal in the vicinity of the gating system solidifies last.

[0061] Fig. 2a shows an exemplary embodiment of a casting device in a schematic view. The casting device 2 comprises a casting mold 4 for casting components out of a molten metal 6. The molten metal 6 is, inter alia, contained in a holding furnace 8 for holding the molten metal 6 at a certain holding furnace level 10 and at a specific temperature. A gating system 11 fluidly connects the holding furnace 8 to the casting mold 4 and to a feeder 13.

[0062] The molten metal 6 can be filled into the holding furnace 8 through an inlet 14, e.g., after having been molten and brought to the desired temperature in a melting furnace (not shown).

[0063] In the shown example, the holding furnace 8 of the casting device 2 is contained within a pressure chamber 16. In the pressure chamber 16, pressure is applied, e.g. via nitrogen, to push the molten metal 6 into the casting mold 4. For instance, during prepressure application or pre-pressurization, pressure is applied to the molten metal 6 at a specific pre-pressure application speed to force the molten metal 6 through a riser tube 12 and the gating system 11 towards the casting mold 4.

[0064] To exert pressure onto the molten metal 6 in the holding furnace 8, the pressure chamber 16 contains an inlet 18. The inlet 18 is connected to a schematically shown pressure control system 20, which can also serve as a general control system for monitoring and regulating various parameters of the casting out by the casting device 2, such as temperature, pressure, injection speed and timing to ensure consistent and high-quality castings.

[0065] HF / HF 241420WO 16 January 2026The pressure system 20 is set up to apply pressure to the molten metal 6 in the holding furnace 8 to force the molten metal 6 through the riser tube 12. For this purpose, gas, such as e.g. nitrogen, is introduced to the pressure chamber 16 via the inlet 18 to increase the pressure applied to the molten metal 6 in the holding furnace 8 and thus force the molten metal 6 to rise upwards through the riser tube 12, the gating system 11 and a sprue 22, which is a channel or passage through which the molten metal 6 is introduced into the casting mold 4. Riser tube 12 and sprue 22 may be regarded as part of the gating system 11. A gating system, i.e., the further components of the gating system besides the sprue 22 and potentially the riser tube 12, could for example be positioned in the fluid way of the molten metal 6 between the riser tube 12 and the sprue 22.

[0066] The casting device 2 may include further components such as a vacuum system for removing air and gases from the casting mold or mold cavity before injection of the molten metal or a cooling system used to rapidly cool the casting after the molten metal has been injected into the casting mold and solidifies. In particular, the casting device 2 may comprise a cooling plate (not shown) arranged directly on top of the mold 4.

[0067] The mold 4 comprises constricted areas 24 which have a small diameter or crosssection such that the flow resistance molten metal 6 increases in the constricted areas 24 and the molten metal level in the riser 13 increases during filling of the constricted areas 24 for reducing the velocity of the molten metal 6 in the constricted areas 24.

[0068] Fig. 2b shows another exemplary embodiment of a casting device 2 in a schematic view. Differing from the embodiment in Fig.2a, two mold 4 are provided, wherein the feeder 13 acts as a damping means during the substantial simultaneous filling of both molds 4.

[0069] HF / HF 241420WO 16 January 2026The exemplary embodiments / aspects of the present invention described in this specification are intended to be understood as disclosed both individually and in all combinations with each other. In particular, even the description of a feature encompassed by an embodiment - unless explicitly stated to the contrary - is not intended to be understood herein as implying that the feature is indispensable or essential to the function of the embodiment. The sequence of the method steps described in this specification is not mandatory; alternative sequences of the method steps are conceivable. The method steps can be implemented in various ways, for example, implementation in software (by program instructions) and hardware is conceivable for implementing the method steps.

[0070] Terms used in the patent claims such as "comprising", "having", "including", "containing" and the like do not exclude further elements or steps. The wording "at least in part" or “substantially” covers both the case "in part" and the case "in full". The phrase "and / or" is intended to be understood to disclose both the alternative and the combination, thus "A and / or B" means "(A) or (B) or (A and BJ". A plurality of entities, persons or the like means multiple entities, persons or the like in the context of this specification. The use of the indefinite article does not preclude a plural. A single device may perform the functions of multiple units or devices recited in the claims. Reference signs indicated in the patent claims are not to be regarded as limitations of the means and steps employed.

[0071] HF / HF 241420WO 16 January 2026Reference signs

[0072] 2 Casting device

[0073] 4 Casting mold

[0074] 6 Molten metal

[0075] 8 Holding furnace

[0076] 10 Holding furnace level

[0077] 11 Gating system

[0078] 12 Riser tube

[0079] 13 Feeder

[0080] 14 Inlet of the holding furnace

[0081] 16 Pressure chamber

[0082] 18 Inlet of the pressure chamber

[0083] 20 Pressure control system

[0084] 22 Sprue 22

[0085] 24 Constricted area

[0086] 100 Step of melting the metal

[0087] 120 Step of introducing and holding the molten metal in the holding furnace 140 Pressurizing and transferring step

[0088] 160 Filling step

[0089] 180 Solidification step

[0090] HF / HF 241420WO 16 January 2026

Claims

January 16, 2026C l a i m s1. Casting method, in particular a low pressure casting method, comprising, preferably in the given order:Holding (120) molten metal (6) in at least one holding furnace (8);Transferring (140) the molten metal (6) from the at least one holding furnace (8) through a gating system (11) at least partly into at least one casting mold (4) for at least partly filling the at least one casting mold (4);characterized in that,the velocity of the molten metal (6) in constricted areas (24) of the at least one mold (4) during the filling of the at least one mold (4) is reduced by at least one feeder (13),wherein the at least one feeder (13) is connected to the gating system (11).

2. Casting method according to claim 1,wherein the molten metal level in the at least one feeder (13) increases for reducing the velocity of the molten metal (6) in constricted areas (24) of the at least one mold (4) during the filling of the at least one mold (4),wherein the molten metal level in the at least one feeder (13) in particular increases to a higher level compared to the molten metal level in the at least one mold (4) for reducing the velocity of the molten metal (6) in the constricted areas (24) of the at least one mold (4) during the filling of the at least one mold (4).

3. Casting method according to claim 1 or 2,wherein the molten metal level in the at least one feeder (13) decreases once the constricted areas (24) of the at least one mold (4) are at least partly filled with molten metal (6);wherein the molten metal level in the at least one feeder (13) in particular decreases to an at least equal or a lower level compared to the molten metal level in the at least one mold (4) once the constricted areas (24) of the at least one mold (4) are at least partly filled with the molten metal (6); and / orwherein the molten metal (6) flows from the at least one feeder (13) into the at least one mold (4).

4. Casting method according to one of the claims 1 to 3,wherein the at least one feeder (13) is indirectly connected to the at least one mold (4) via the gating system (11).

5. Casting method according to one of the claims 1 to 5,wherein the casting method further comprises:Pressurizing (140) the molten metal (6) in the at least one holding furnace (8) to transfer the molten metal (6) from the at least one holding furnace (8) through the gating system (11) at least partly into the at least one casting mold (4), wherein the pressure preferably is gradually increased during a casting cycle.

6. Casting method according to one of the claims 1 to 5,wherein the at least one mold (4) and / or the at least one feeder (13) are filled via the gating system (11) from below.

7. Casting method according to one of the claims 1 to 6,wherein the casting method further comprises:Solidifying the molten metal (6) provided into the at least one mold (4) substantially unidirectionally,wherein the molten metal (6) in the vicinity of the gating system (11) preferably solidifies last.

8. Casting method according to one of the claims 1 to 7,HF / HF 241420WO 16 January 2026wherein the velocity of the molten metal (6) in the mold does not exceed 1 m / s, in particular 0.8 m / s.

9. Casting device, in particular a low pressure casting device, preferably for performing a casting method according to one of the claims 1 to 8, comprising: at least one mold (4) for casting components out of molten metal (6); wherein the at least one mold (4) comprises constricted areas (24);at least one holding furnace (8) for holding the molten metal (6); anda gating system (11) for connecting the at least one mold (4) to the at least one holding furnace (8);characterized in that,at least one feeder (13) is connected via the gating system (11) to the at least one mold (4) for reducing the velocity of the molten metal (6) in the constricted areas (24) during the filling on the at least one mold (4).

10. Casting device according to claim 9,wherein the at least one feeder (13) extends above the at least one mold (4).

11. Casting device according to claim 9 or 10 further comprising:at least one pressure control system (20) for providing pressure to the molten metal (6) in the at least one holding furnace (8) for transferring the molten metal (6) through the gating system (11) at least partly into the at least one casting mold (4), wherein the pressure preferably is gradually increased during a casting cycle.

12. Casting device according to one of the claims 9 to 11,wherein the at least one gating system (11) is arranged below the at least one mold (4) and / or below the at least one feeder (13).

13. Casting device according to one of claims 9 to 12,HF / HF 241420WO 16 January 2026wherein the casting device (2) comprises at least two molds (4) for casting at least two cast components in one cast cycle,wherein the at least one feeder (13), in particular one feeder (13), is connected via the gating system (11) to the at least two molds (4).

14. Casting device according to one of the claims 9 to 13,wherein the ratio of the capacity of the at least one feeder (13) to the capacity of the at least one mold (4) is below 1:2, in particular below 1:5, preferably below 1:10.

15. Casting device according to one of the claims 9 to 14,wherein at least one cooling plate is arranged, in particular directly, on top of the at least one mold (4).HF / HF 241420WO 16 January 2026

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