Clamping plate for a die-casting device and set comprising same

Abstract

The invention relates to a clamping plate (2) for a die-casting device (1) for producing a metal molded part in order to rigidly connect a first casting mold part (4) of a multi-part casting mold (3) of the die-casting device (1) to the clamping plate (2), wherein the clamping plate (2) has a passage (6) leading through the clamping plate (2) in order to press casting material from a filling chamber (10) of the die-casting device (1) through the passage (6) into the casting mould (3). In order to achieve easy convertibility for carrying out a thixomolding method, the clamping plate (2) has a feed corridor (7) oriented transversely, in particular orthogonally, to the passage (6), wherein the passage (6) and the feed corridor (7) are connected via a free space (9) of the clamping plate (2) in order, in particular optionally, to convey thixotropic material as casting material via the feed corridor (7), and in particular via the passage (6), into the filling chamber (10). The invention further relates to a set having a clamping plate (2), to a die-casting device (1) having a clamping plate (2), and to a method for producing a metal molded part using a die-casting device (1).

Description

[0001] Mounting plate for a die-casting device and set comprising such a

[0002] The invention relates to a mounting plate for a die-casting device for producing a metallic molded part, in order to rigidly connect a first molded part of a multi-part mold of the die-casting device to the mounting plate, wherein the mounting plate has a passage through the mounting plate in order to press casting material from a filling chamber of the die-casting device through the passage into the mold.

[0003] The invention further relates to a set comprising a mounting plate for a die-casting device in order to rigidly connect a first casting part of a multi-part casting mold of the die-casting device to the mounting plate, wherein the mounting plate has a passage through the mounting plate in order to press casting material from a filling chamber of the die-casting device through the passage into the casting mold.

[0004] The invention further relates to a die-casting device for producing a metallic molded part, wherein the die-casting device has a filling chamber, a press piston movable in the filling chamber, a mounting plate and a first casting mold part of a multi-part casting mold of the die-casting device connected to the mounting plate, wherein the mounting plate has a passage through the mounting plate in order to press casting material from the filling chamber through the passage into the casting mold with the press piston.

[0005] Furthermore, the invention relates to a method for producing a metallic molded part using a die-casting device.

[0006] Die-casting devices for producing metallic molded parts are known from the prior art. In these devices, liquid casting material, supplied in a filling chamber, is forced under pressure into a multi-part mold by a piston and allowed to solidify within the mold to form the molded part. The mold typically comprises a first molded part rigidly mounted on a clamping plate and a second molded part movable relative to the clamping plate. Moving the second molded part opens the mold for removal of the molded part after it has solidified. To produce the molded part, the casting material is typically forced from the filling chamber through a passage in the clamping plate into a cavity of the closed mold. This method allows for the production of molded parts with short cycle times, particularly suitable for mass production.

[0007] Thixomolding processes are also known, where, similar to die casting, casting material is supplied to a filling chamber to be pressed into a multi-part mold. The casting material, usually a magnesium-based alloy, is typically brought into a thixotropic state by a screw under shear stress, usually within a temperature range between the solidus and liquidus temperatures of the casting material. The thixotropic material is often fed into the mold by a forward movement of the screw. Molded parts can be produced in this way with high precision and quality. However, compared to a conventional die casting process, the preparation, supply, and pressing of the thixotropic casting material into the mold generally requires more complex process control and a more elaborate setup.

[0008] This is where the invention comes in. The object of the invention is to provide a mounting plate of the type mentioned above with which a die-casting device can be easily converted in such a way that a thixomolding process can be practically operated with it, and in particular, optionally a die-casting process.

[0009] Furthermore, it is an objective of the invention to provide a set of the type mentioned above with which a die-casting device can be easily converted in such a way that a thixomolding process can be practically operated with it, and in particular, a die-casting process can be optionally operated.

[0010] Furthermore, it is an objective of the invention to provide a die-casting device of the type mentioned above with which a thixomolding process can be practically carried out. It is also an objective of the invention to provide a method for producing a molded part with a die-casting device with which high-quality molded parts formed by thixomolding can be produced.

[0011] The object of the invention is achieved by providing a mounting plate of the type mentioned above with a feed corridor oriented transversely, in particular orthogonally, to the passage, wherein the passage and the feed corridor are connected via a free space of the mounting plate in order to convey, in particular optionally, thixotropic material as casting material via the feed corridor, and in particular via the passage, into the filling chamber.

[0012] In this way, a mounting plate is provided which, by replacing the mounting plate of a die-casting machine being converted, makes it easy to implement a thixomolding process with the die-casting machine. Since the mounting plate, in addition to the usual mounting plate opening, has a feed corridor for supplying thixotropic material as casting material, the thixomolding process can be carried out with the die-casting machine without significantly reducing the space on the back side of the mounting plate facing the mold, which is usually required for efficient opening movement of the mold parts, and / or without significantly reducing the space on the front side of the mounting plate opposite the back side, which is usually required for efficient movement of a press piston of the die-casting machine.This makes it possible to efficiently carry out the thixomolding process with the die-casting device and, in particular, to achieve a high molded part quality of the molded parts produced using the thixomolding process.

[0013] Guiding the casting material through the mounting plate can be achieved using a transfer piece that can be arranged, particularly detachably, in the passage and / or feed channel. The transfer piece is typically tubular. Depending on whether a die-casting or thixomolding process is to be used with the die-casting device, a differently designed transfer piece can usually be arranged in the passage and / or feed channel, and in particular inserted into it.In particular, the transfer piece, especially as a second transfer piece, can be designed for a thixomolding process to create a casting material-conducting connection between a thixotropic material that can be supplied via the feed corridor and the filling chamber in order to fill the filling chamber, or the transfer piece, especially as a first transfer piece, can be designed for a die-casting process not to create such a casting material-conducting connection.

[0014] The passage typically extends from a front side of the mounting plate to a rear side. The front and rear sides of the mounting plate are usually opposite sides. The mold, in particular the first mold part, is typically arranged on the rear side of the mounting plate, and in particular, rigidly connected to the mounting plate. The passage is preferably straight. The feed corridor typically extends from a lateral side of the mounting plate, in particular at least to the free space. It can be practical for the mounting plate to have several feed corridors. The feed corridors can extend from different lateral sides of the mounting plate to the free space. Typically, each feed channel forms an inlet on one of the lateral sides of the mounting plate.This allows thixotropic material to be conveyed into the filling chamber via the respective feed corridor as casting material. The feed corridors are usually connected to each other across the free space. It is advantageous if the mounting plate has two feed corridors extending from opposite lateral sides of the mounting plate to the free space. The two feed corridors can run along a common longitudinal axis. The inlets of the two feed corridors are usually located on opposite lateral sides. This can be practically implemented if one feed corridor extends completely through the mounting plate, typically between two opposite lateral sides of the mounting plate. The implementation of the feed corridor described in this document can apply to each feed corridor, in particular independently of each other.The feed corridor is preferably straight. The passage and the feed corridor, in particular their longitudinal axes, are usually aligned converging with each other, especially towards the free space. The feed corridor, in particular its longitudinal axis, is usually oriented transversely, in particular orthogonally, to the passage, in particular its longitudinal axis. Transversely usually denotes an angular orientation with each other, in particular at an angle greater than 10°. The longitudinal axis of the feed corridor and the longitudinal axis of the passage usually have an angle of 10° to 170°, in particular 45° to 135°, preferably 80° to 100°. In an insert of the mounting plate, the mounting plate can be oriented such that the passage is essentially horizontal and / or that the feed corridor is essentially horizontal or vertical. The mounting plate is usually formed in one piece.

[0015] The clearance can include an intersection area between the passage and the feed corridor, in particular the intersection area itself. The clearance is usually located within the mounting plate. This ensures high robustness. The clearance can divide the passage into a first passage section and a second passage section. The first passage section and the second passage section are usually connected to each other by the clearance. The mounting plate can, in particular alternatively, have a recess, the recess forming the clearance. The recess can be located on the front of the mounting plate and / or on a side of the mounting plate facing away from the mold. This is particularly relevant during the use of the mounting plate. This allows for easy handling, in particular easy positioning of the respective transfer piece, at least partially within the clearance.For high robustness, it is preferred that the free space be located within the mounting plate. The recess typically has a decreasing cross-sectional area along one of its depth directions. The recess may have a convex shape. The passage may open into a bottom surface of the recess. The feed corridor may open into a side surface of the recess. The longitudinal axis of the passage and the longitudinal axis of the feed corridor may intersect. This intersection is usually located within the free space.

[0016] The objective is achieved according to the invention in that, in a set of the type mentioned at the outset, the mounting plate has a feed corridor oriented transversely, in particular orthogonally, to the passage, wherein the passage and the feed corridor are connected via a free space of the mounting plate, wherein the set has a, in particular tubular, first transfer piece and / or a, in particular tubular, second transfer piece in order to, in particular optionally, arrange one of the transfer pieces at least partially in the free space, wherein the respective transfer piece has the filling chamber or is connectable to the filling chamber in a manner that conducts casting material and is designed and can be arranged at least partially in the free space such that, in use, casting material from the filling chamber can be pressed at least section by section through the passage into the mold within the respective transfer piece.wherein the first transfer piece has no inlet opening and the second transfer piece has an inlet opening to guide thixotropic material supplied via the feed corridor into the filling chamber. The set can be configured according to the features and effects described in this document in relation to the mounting plate, the die-casting device, and the method. The same applies to the mounting plate, the die-casting device, and the method with regard to the set. The mounting plate can be configured as described in this document, in particular, it can be the mounting plate described in this document. The respective transfer piece can be equipped with, in particular by, one or with, in particular by, several, usually casting material-conductingInterconnected transfer tubes are formed to guide the casting material. Typically, the first and second transfer pieces can be arranged at least partially in free space, either optionally or alternatively to each other. Generally, each transfer piece can be arranged at least partially in free space when connected to the mounting plate. The respective transfer piece can be supported on the mounting plate, particularly on the passage walls of the passage. If the mounting plate has several feed corridors, the second transfer piece can have several inlet openings, with each inlet opening being assigned to one of the feed corridors in order to guide thixotropic material supplied via the respective feed corridor into the filling chamber. Typically, different inlet openings are assigned to different feed corridors.

[0017] The term "application," particularly of the respective transfer piece, typically refers to an arrangement during intended use, especially within the context of the die-casting device. When the second transfer piece is used, it is typically arranged for the thixomolding process. Similarly, when the first transfer piece is used, it is typically arranged for the die-casting process. In particular, a distinction is made between a liquid casting material and a thixotropic material, and between the injection of liquid casting material into the mold during the die-casting process and the injection of thixotropic material during the thixomolding process.Typically, in the use of the respective transfer piece, the transfer element for the casting material line, particularly within the transfer piece, is arranged at least partially in free space, and is especially connected to the mounting plate. This can be implemented as described in this document. The respective transfer piece usually refers to the first transfer piece and / or the second transfer piece.

[0018] It is advantageous if the respective transfer piece can be arranged at least partially in the free space, so that during use, casting material from the filling chamber can be guided through the passage within the respective transfer piece, at least section by section, or pressed into the mold. In particular, the casting material can be guided through the passage by the transfer piece. The respective transfer piece can be a component configuration, especially a multi-part one. The first transfer piece and the second transfer piece can be different component configurations as described above.It is advantageous if the respective transfer piece extends through an inlet of the passage arranged at the front of the mounting plate and / or to at least an outlet of the passage arranged at the rear of the mounting plate in order to guide the casting material through the passage within the transfer piece.

[0019] The first transfer piece can be designed such that thixotropic material fed via the feed corridor cannot be introduced into the first transfer piece during its use. If the mounting plate has multiple feed corridors, this usually applies to all of them. In this way, a die-casting process can be implemented. The second transfer piece can be designed such that thixotropic material fed via the feed corridor can be introduced into the second transfer piece during its use. If the mounting plate has multiple feed corridors, this can apply to several of them. In particular, by introducing the thixotropic material into the second transfer piece, the filling chamber can be filled with thixotropic material as casting material via the transfer piece. In this way, a thixomolding process can be implemented.Switching between die casting and thixomolding processes can be accomplished with minimal effort by simply replacing the transfer piece, and in particular without requiring complex modifications to the mounting plate. This allows for the easy expansion of the operational capability of a large number of existing die casting fixtures.

[0020] The respective transfer piece can include the filling chamber, particularly for replacing a filling chamber of a die-casting machine being converted. The filling chamber is typically designed to accommodate a press piston of a die-casting machine, particularly one being converted. The press piston is typically movable within the filling chamber, particularly relative to the filling chamber, in order to press casting material located in the filling chamber through the passage, particularly into the mold. Preferably, in the application, a longitudinal axis of the filling chamber and / or a path of movement of the press piston for pressing in the casting material are oriented parallel to the longitudinal axis of the passage, particularly aligned with it. Alternatively, the respective transfer piece can be connected to the filling chamber of the die-casting machine in a way that conducts the casting material.The transfer piece can be connected to the filling chamber in such a way that casting material can be transferred between the transfer piece and the filling chamber via a connecting opening in the transfer piece. The inlet opening of the transfer piece can be connected to the connecting opening in a way that conducts casting material. In operation, the filling chamber is usually located at least partially, and in particular entirely, in front of the mounting plate. In operation, the filling chamber can project into the passage and / or be located at least partially within the passage. An implementation of the respective transfer piece described in this document can refer to the first transfer piece and / or the second transfer piece.

[0021] It is practical if the respective transfer piece has a feedthrough channel, particularly a straight one, to guide casting material from the filling chamber through the feedthrough channel, at least partially, and especially to press it through. This applies particularly to pressing the casting material from the filling chamber into the mold. The feedthrough channel is usually connected to the filling chamber in a way that allows the casting material to pass through. In particular, the feedthrough channel can connect to the filling chamber. A longitudinal axis of the feedthrough channel is usually parallel to the longitudinal axis of the feedthrough. The feedthrough channel can extend, particularly from a connection point of the feedthrough channel to the filling chamber, at least to an outlet of the feedthrough located on the rear side of the mounting plate.In the case of each transfer piece, the longitudinal axis of the feed corridor typically runs transversely, and in particular orthogonally, to a longitudinal axis of the feed channel. For simple material guidance, especially for feeding thixotropic casting materials, it is practical if, in the case of each transfer piece, particularly the second transfer piece, the longitudinal axis of the feed corridor intersects the feed channel. The respective transfer piece can extend completely through the passage. To inject the casting material into the mold, the material is usually pressed through the first mold component, in particular an injection channel of the mold component, into the mold, specifically a cavity of the mold.In particular, when using the respective transfer piece, the transfer piece, especially its feedthrough channel, can extend along a predominant, preferably the entire, length of the passage through the opening. In this way, the casting material can be practically guided through the opening within the transfer piece, especially the feedthrough channel, over a corresponding length. The average inner diameter of the feedthrough channel can be smaller than or equal to the average inner diameter of the filling chamber. The average inner diameter of the feedthrough channel of the second transfer piece is usually smaller than the average inner diameter of the filling chamber. The average inner diameter of the feedthrough channel of the first transfer piece is usually equal to the average inner diameter of the filling chamber.It has proven advantageous for the first transfer piece to include the filling chamber, with the filling chamber extending at least to an outlet of the passage located on the rear of the mounting plate. Typically, the first transfer piece then does not have a feedthrough channel. The reason for this is that, during the die-casting process, as part of the injection molding of the casting material from the filling chamber into the mold, the casting material is essentially removed from the injection path, particularly within the mounting plate, to prevent solidification of the casting material along this path. Therefore, it is beneficial to avoid any narrowing of the casting material's guide path along this injection path, especially within the mounting plate.During the thixomolding process, thixotropic casting material typically remains along the insertion path between two successive insertion operations, often after heating the thixotropic casting material, and is generally not removed before the subsequent insertion operation. The above applies particularly to the use of the respective transfer piece. The die-casting process is generally a cold-chamber die-casting process.

[0022] The inlet opening of the second transfer piece can be connected to the feedthrough channel in a way that conducts the casting material, in order to guide thixotropic material through the feedthrough channel into the filling chamber during operation. In particular, the inlet opening can be part of the feedthrough channel or connected to it. The inlet opening can connect laterally to the feedthrough channel. The normal to the opening surface of the inlet opening can be oriented transversely, and in particular orthogonally, to the longitudinal axis of the feedthrough channel. Specifically, the thixotropic material supplied via the inlet opening can be used to fill the filling chamber through the feedthrough channel, particularly against the direction of injection of the casting material in the feedthrough channel, from the filling chamber into the mold. Subsequently, the thixotropic material in the filling chamber can be forced out of the filling chamber, particularly in the direction of injection, through the feedthrough channel and into the mold.Pressing can be performed using a press piston of the die-casting device, particularly one that is being retrofitted. It is advantageous if, when using the second transfer piece, the inlet opening is directed towards an inlet of the feed corridor. Specifically, the longitudinal axis of the feed corridor can run through the inlet opening. This enables efficient, material-conducting feeding of the thixotropic material via the feed corridor into the second transfer piece. It is also advantageous if, when using the second transfer piece, the inlet opening is located in the free space. The implementation of the inlet opening described in this document can be applied to the respective inlet opening.

[0023] It is practical if the second transfer piece has a feed channel that is connected to the feed channel in a way that conducts the casting material, in order to guide thixotropic material supplied via the feed corridor into the feed channel during the use of the second transfer piece. In particular, this allows the filling chamber to be filled via the feed channel with the thixotropic material introduced into the feed channel. It is practical if the feed channel is connected to the feed channel in a way that conducts the casting material between two feed channel segments of the feed channel, and in particular if it connects to the feed channel. The feed channel, and in particular its longitudinal axis, can be oriented transversely, and in particular orthogonally, to the feed channel, and in particular to its longitudinal axis. The feed channel can be connected to the feed channel in a way that conducts the casting material, in particular at a connection point.It is advantageous if, in the use of the second transfer piece, the feed channel, in particular its longitudinal axis, is oriented parallel to a longitudinal axis or depth direction of the feed corridor. The feed channel can be oriented from the connection point towards an inlet of the feed corridor. Alternatively, the feed channel can extend from the connection point, against the depth direction of the feed corridor, through the feed corridor for a predominant length corresponding to the distance between the connection point and an inlet of the feed corridor. An inlet of the feed channel, through which thixotropic material can be introduced for conveyance to the feedthrough channel, can be located outside or inside the mounting plate, in particular the feed corridor. The feed channel can be connected to the inlet opening in a way that allows the flow of casting material, in particular, it can be connected to the inlet opening.The above applies particularly to the use of the second transfer piece. If the mounting plate has several feed corridors, the second transfer piece can analogously have several feed channels, with each feed channel being assigned to one of the feed corridors, in particular as described. It is practical for the second transfer piece to have a channel intersection comprising a first channel segment, a second channel segment, and a third channel segment, all of which converge at a central point of the intersection. The first and second channel segments are typically formed by the feed-through channel, in particular by a section of the feed-through channel. The third channel segment is typically formed by the feed channel, in particular by a section of the feed-through channel.When using the second transfer piece, the first channel segment can lead from the channel intersection center to the filling chamber, the second channel segment to the mold, and the third channel segment to the feed channel inlet. A path from the first channel segment to the second channel segment allows casting material to be conveyed from the filling chamber to the mold. A path from the third channel segment to the first channel segment allows the thixotropic material supplied via the feed corridor to be conveyed into the filling chamber. This is particularly relevant when using the second transfer piece. If the second transfer piece has multiple feed channels, the channel intersection can similarly have multiple third channel segments, with each third channel segment typically forming part of the respective feed channel, or more specifically, a section of the respective feed channel.

[0024] The second transfer piece, in particular the feed channel, can have a connection for conveying the casting material to a screw-cylinder unit, especially the screw-cylinder unit of the set or the die-casting device. The connection can be located outside or, preferably, inside the feed corridor. This applies particularly when using the second transfer piece. It is advantageous if the set includes a screw-cylinder unit for generating the thixotropic material. The screw-cylinder unit can be arranged such that, when using the second transfer piece, the thixotropic material generated by the screw-cylinder unit can be conveyed into the feed opening. When using the second transfer piece, the screw-cylinder unit can be connected to or attached to the second transfer piece, in particular the feed channel, in a way that conveys the casting material.In particular, the thixotropic material produced by the screw-cylinder unit can be conveyed via the feed corridor into the feed channel. In this way, the thixotropic material can be directed, and in particular conveyed, into the filling chamber via the feed channel. This enables reliable filling of the filling chamber with the thixotropic material. The screw-cylinder unit can be configured as described in this document, in particular the screw-cylinder unit described in this document. It is advantageous if the second transfer piece has a sealing seat against which, during operation, a front end of the screw can be engaged, in particular by axial displacement of the screw, so that backflow of thixotropic material into the screw-cylinder unit is prevented. The sealing seat can be formed by the feed channel, in particular the connection of the feed channel.For high robustness, it is advantageous if the screw-cylinder unit, especially an end segment of the screw-cylinder unit, projects into the feed corridor. The second transfer piece can have multiple connections for the respective material-conducting connection to a screw-cylinder unit. In particular, the respective feed channel can have one of the connections. The set and / or the die-casting device can have multiple screw-cylinder units. Similarly, the respective screw-cylinder unit, the respective feed channel, the respective inlet opening, and the respective feed corridor can be assigned to one another.

[0025] The transfer channel and the filling chamber can be connected to each other via an inlet opening of the transfer channel, allowing the flow of casting material. The cross-sectional area of ​​the inlet opening is typically smaller than the average cross-sectional area of ​​the filling chamber. This applies particularly to the second transfer piece. The filling chamber typically has an elongated, and in particular, substantially cylindrical, shape. The cross-sectional area of ​​the filling chamber is typically perpendicular to a longitudinal axis of the filling chamber. Specifically, the inlet opening can connect to the filling chamber, and in particular, be part of the filling chamber. The above applies particularly to the use of the respective transfer piece. The respective transfer piece can be formed in one piece or with several segments that can be connected to each other, in particular detachably. For high robustness, it is advantageous if the channel intersection of the second transfer piece is formed in one piece.It can be advantageous, particularly as an alternative, for simple maintenance if the feed channel and the through-channel are formed with different segments of the second transmission piece. The further stated objective is achieved with a die-casting device of the type mentioned above if the mounting plate has a feed corridor oriented transversely, and in particular orthogonally, to the through-channel, wherein the through-channel and the feed corridor are connected via a free space in the mounting plate, wherein the die-casting device has a screw-cylinder unit for producing thixotropic material, wherein the screw-cylinder unit is connected to the filling chamber in a way that allows the casting material to be conveyed, such that thixotropic material produced by the screw-cylinder unit can be conveyed into the filling chamber via the feed corridor, and in particular the through-channel.In this way, a die-casting fixture can be used efficiently to operate a thixomolding process, particularly as described in this document. The mounting plate of the die-casting fixture can be configured as described in this document, and in particular, it can be the mounting plate described herein. The die-casting fixture can be designed according to the features and effects described in this document regarding the mounting plate, the set, and the process. The same applies to the mounting plate, the set, and the process with respect to the die-casting fixture.

[0026] The die-casting device can have a second transfer piece, which is at least partially arranged in free space, in particular detachably, wherein the second transfer piece includes the filling chamber or is connected to the filling chamber in a way that conducts the casting material, such that casting material located in the filling chamber can be pressed at least section by section through the passage from the filling chamber into the mold within the second transfer piece. In particular, this allows the casting material to be pressed from the filling chamber into the filling chamber via the second transfer piece, usually through the passage. It is advantageous if the second transfer piece has an inlet opening, wherein the screw-cylinder unit is connected to the inlet opening in a way that conducts the casting material, so that thixotropic material produced by the screw-cylinder unit can be conveyed into the filling chamber via the inlet opening.The inlet opening is typically connected to the filling chamber via a conduit for the casting material. In particular, the screw-cylinder unit can connect to the inlet opening. For greater robustness, it is advantageous if the screw-cylinder unit projects at least partially into the feed corridor, especially such that the outlet portal is located within the feed corridor. It is practical for the second transfer piece to have a feed channel, with the screw-cylinder unit connected to the inlet opening via this feed channel, thus conduiting the casting material. The inlet opening can be part of a through-channel of the second transfer piece, with the through-channel connecting the filling chamber and the mold via a conduit for the casting material, in order to force casting material from the filling chamber into the mold via the through-channel. Alternatively, the inlet opening can be part of the filling chamber or open into the filling chamber.

[0027] The screw-cylinder unit typically comprises a cylinder and a screw, the screw being rotatably arranged inside the cylinder, particularly relative to the cylinder. The die-casting device, especially the screw-cylinder unit, may include a motor for rotating the screw. The screw-cylinder unit typically has an outlet portal for conveying, in particular, expelling, thixotropic casting material produced by the screw-cylinder unit. The outlet portal may be located in an end segment of the screw-cylinder unit. The screw serves to bring metallic material fed to the screw-cylinder unit into a thixotropic state. This is typically achieved by shearing the casting material while rotating the screw, usually relative to the cylinder.The screw-cylinder unit typically includes a temperature control device for tempering, and in particular heating, the casting material. The temperature control device can be a heater, which is preferably located on the outside of the screw-cylinder unit. The heater can, for example, be a resistance heater, particularly one consisting of one or more resistance heating elements. The screw is usually arranged to be axially displaceable within the cylinder, particularly relative to the cylinder. The screw is usually axially displaceable in the direction of the exit portal. The die-casting device, and in particular the screw-cylinder unit, may include a motor, which may be the aforementioned motor, for axially displacing the screw.Practically, the thixotropic casting material produced by the screw-cylinder unit can be forced out of the screw-cylinder unit, particularly into the feed corridor or the second transfer piece, by axially displacing the screw. This can be achieved by conveying the thixotropic casting material into the filling chamber, specifically by filling the filling chamber. In this way, the thixotropic casting material can be forced through the outlet portal into the feed corridor or the second transfer piece. This allows for very precise metering of the filling chamber. Alternatively, the thixotropic casting material produced by the screw-cylinder unit can be conveyed out of the screw-cylinder unit by rotating the screw, thereby filling the filling chamber with the thixotropic casting material.

[0028] To prevent backflow of thixotropic casting material from the filling chamber via the second transfer piece back into the screw-cylinder unit after the filling chamber has been filled, it can be advantageous to reversibly interrupt the connection between the screw-cylinder unit and the second transfer piece that conducts the casting material. It is advantageous if the second transfer piece, particularly the feed channel, has a sealing seat against which a leading end of the screw can be positioned, thus preventing backflow of thixotropic casting material into the screw-cylinder unit. The leading end is typically the end of the screw facing the outlet portal. The screw can be positioned against the sealing seat by axially displacing it. This axial displacement of the screw can be implemented as described, in particular above, in this document.The front end of the screw can have an end-face stop that is shaped to correspond to the sealing seat, so that when the screw is positioned against the sealing seat, a press fit is formed between the stop and the sealing seat. This creates a casting-material-tight connection between the stop and the sealing seat, preventing backflow of the thixotropic casting material. The sealing seat can be tapered, particularly from the positioning direction in which the screw is positioned against the sealing seat. The longitudinal axis of the screw-cylinder unit is preferably oriented parallel to the longitudinal axis of the feed corridor. The longitudinal axis of the screw-cylinder unit can be arranged vertically or, preferably, horizontally. The longitudinal axis of the screw-cylinder unit is typically the longitudinal axis of the screw.The filling chamber, and in particular its longitudinal axis, is usually arranged horizontally so that a press piston, which is generally arranged horizontally, of a die-casting device or the die-casting assembly being converted can be easily inserted into the filling chamber. The die-casting device usually has a press piston that is movable within the filling chamber in order to press the casting material located in the filling chamber through the passage into the mold, in particular into a cavity of the mold, by moving, and in particular by moving, the press piston. This usually takes place with the mold closed. The first mold part is usually rigidly connected to the mounting plate, and in particular rigidly mounted to the mounting plate. The first mold part is usually located on the rear side of the mounting plate. The filling chamber is usually located at least partially, and in particular predominantly, on the front side of the mounting plate.The back and front of the mounting plate are usually opposite sides of the mounting plate.

[0029] The mounting plate can have multiple feed corridors and multiple screw-cylinder units, with each screw-cylinder unit assigned to one of the feed corridors to convey thixotropic material produced by the respective screw-cylinder unit into the filling chamber via the respective feed corridor, and in particular, the passage. The second transfer piece can then have multiple inlet openings and / or multiple connections and / or multiple feed channels. The respective screw-cylinder unit and the respective feed corridor can be assigned to the respective inlet opening and / or the respective feed corridor. This can be implemented analogously to the configuration described in this document. This makes it possible to convey thixotropic material to the filling chamber via the respective feed channel and / or the respective inlet opening using the respective screw-cylinder unit.

[0030] The objective is achieved by a method for producing a metallic molded part using a die-casting device described in this document. This method enables the use of a die-casting device to perform a thixomolding process for producing high-quality molded parts. As described, particularly at the beginning of this document, by feeding the thixotropic material through the feed corridor, the thixomolding process can be carried out with the die-casting device without significantly reducing the space on the rear side of the mounting plate facing the mold, which is typically required for efficient opening of the molded parts, and / or without significantly reducing the space on the front side of the mounting plate opposite the rear side, which is typically required for efficient movement of a press piston of the die-casting device.This enables high part quality to be achieved in parts produced using the thixomolding process. Typically, especially for part production, thixotropic material generated by the screw-cylinder unit is conveyed through the feed opening into the filling chamber. From there, the thixotropic material is forced through the passage into the mold, specifically a cavity of the mold, usually while the mold is closed. The part is formed by the solidification, or in particular, the solidification, of the casting material in the mold. The mold can then be opened, usually by moving a second mold part relative to the first, and especially relative to the mounting plate, to remove the part. This process can be carried out using a die-casting device described in this document.

[0031] Further features, advantages, and effects of the invention will become apparent from the following description of an exemplary embodiment. The drawings referred to therein show:

[0032] Fig. 1 shows a schematic representation of a section of a die-casting device for the production of a metallic molded part using a thixomolding process;

[0033] Fig. 2 is a schematic representation of a mounting plate of the die-casting device of Fig. 1;

[0034] Figs. 3 and 4 are schematic representations of a section of the die-casting device of Fig. 1 for the production of a metallic molded part using a die-casting process in various variants;

[0035] Fig. 5 shows a schematic representation of a section of another die-casting device for the production of a metallic molded part using a thixomolding process.

[0036] Figure 1 schematically shows a section of a die-casting device 1 for producing a metallic molded part. The die-casting device 1 is configured to operate a thixomolding process. The die-casting device 1 comprises a filling chamber 10, a press piston 14 movable in the filling chamber 10, a mounting plate 2, and a first mold part 4 of a multi-part mold 3 of the die-casting device 1 connected to the mounting plate 2.The mounting plate 2 has a passage 6 extending through it, for pressing the casting material from the filling chamber 10 through the passage 6 into a cavity 15 of the mold 3 with the press piston 14, and a feed corridor 7 oriented transversely, in particular orthogonally, to the passage 6, wherein the passage 6 and the feed corridor 7 are connected to each other via a free space 9 of the mounting plate 2 in order to direct thixotropic material as casting material into the filling chamber 10 via the feed corridor 7. Figure 2 schematically shows the mounting plate 2 of the die-casting device 1 of Figure 1 with the mold 3 arranged on the mounting plate 2.

[0037] The die-casting device 1 has a second transfer piece 8, which is at least partially arranged in the free space 9. The second transfer piece 8 has a, in particular straight, feed channel 11 to guide casting material from the filling chamber 10 through the feed channel 11 and through the passage 6, and in particular to press it into the mold 3. The second transfer piece 8 has a feed channel 12 oriented transversely to the feed channel 11, which is connected to the feed channel 11 in a way that conducts casting material, and is oriented towards an inlet of the feed corridor 7. The die-casting device 1 has a screw-cylinder unit 13 for producing thixotropic material, wherein the screw-cylinder unit 13 is connected to the feed channel 12 in order to convey thixotropic material produced by the screw-cylinder unit 13 via the feed channel 12 to the filling chamber 10.The screw-cylinder unit 13 can partially project into the feed corridor 7. The feed channel 12 has a sealing seat 17 at which a front end of the screw can be adjusted, in particular with an axial displacement of the screw, which may be controllable, so that backflow of thixotropic material into the screw-cylinder unit 13 is prevented. The filling chamber 10 can be designed as part of the second transfer piece 8, or the second transfer piece 8, in particular the feedthrough channel 11, can be connected to the filling chamber 10 in a way that conducts the casting material. In an alternative embodiment, the die-casting device 1 can be used to operate a die-casting process. Figures 3 and 4 each show a schematic section of the die-casting device 1, which is configured to produce a metallic molded part using a die-casting process.Instead of the second transfer piece 8, a first transfer piece 16 is inserted into the free space 9, the first transfer piece 16 being designed such that thixotropic material supplied via the feed corridor 7 cannot be introduced into the first transfer piece 16. Accordingly, the die-casting device 1 can then be implemented without the screw-cylinder unit 13 for producing thixotropic material. Figures 3 and 4 show implementations of the die-casting device 1 with different first transfer pieces 16. In Figure 3, the first transfer piece 16 has a feed channel 11 to force liquid casting material from the filling chamber 10, which can be part of the first transfer piece 16, through the feed channel 11 into the mold 3. The first transfer piece 16 can be designed analogously to the second transfer piece 8, but without the possibility of supplying thixotropic material via the supply corridor 7. In Fig.4 is the first transfer piece 16 formed with the filling chamber 10, wherein the filling chamber 10 extends through the passage 6, in particular to the first mold part 4, preferably sectionally into it. The filling chamber 10 is typically designed with a substantially constant inner diameter along a longitudinal extent of the filling chamber 10.

[0038] Figure 5 shows a schematic representation of a section of another die-casting device 1 for producing a metallic molded part using a thixomolding process. The die-casting device 1 of Figure 5 is designed according to the die-casting device 1 of Figure 1. In contrast to the implementation of Figure 1, the feed corridor 7 of the mounting plate extends completely through the mounting plate 2, so that the feed corridor 7 forms two inlets between which the feed corridor 7 runs. This represents an implementation with two feed corridors 7, which are connected to each other, in particular via the free space. The inlets are usually arranged opposite each other on the mounting plate 2. The second transfer piece 8 is designed analogously to the implementation of Figure 1, but has two feed channels 12 oriented transversely to the feed channel 11, which are connected to the feed channel 11 in a way that conducts the casting material.The die-casting device 1 has two screw-cylinder units 13 for producing thixotropic material, each screw-cylinder unit 13 being connected to one of the feed channels 12 in order to convey the thixotropic material produced by the respective screw-cylinder unit 13 via the respective feed channel 12 to the filling chamber 10. This can be implemented as described in Fig. 1. In this way, the filling chamber 10 can be filled with thixotropic material via the respective feed channel 12 by the screw-cylinder units 13, particularly simultaneously.Similarly, the mounting plate 2 can have one or more further inlets formed with the feed corridor 7 and / or the second transfer piece 8 can have one or more further feed channels 12 in order to convey thixotropic material to the filling chamber 10 via the respective further feed channel 12 with one or more further screw-cylinder units 13 of the die-casting device.

[0039] In this way, by exchanging the transfer pieces 8, 16, it is practical to switch between a thixomolding process and a die-casting process using the die-casting device 1. Depending on the design of the respective transfer piece 8, 16, a high degree of practicality can be achieved.

Claims

Patent claims 1. Mounting plate (2) for a die-casting device (1) for producing a metallic molded part, in order to rigidly connect a first molded part (4) of a multi-part mold (3) of the die-casting device (1) to the mounting plate (2), wherein the mounting plate (2) has a passage (6) through the mounting plate (2) in order to press casting material from a filling chamber (10) of the die-casting device (1) through the passage (6) into the mold (3), characterized in that the mounting plate (2) has a feed corridor (7) oriented transversely, in particular orthogonally, to the passage (6), wherein the passage (6) and the feed corridor (7) are connected via a free space (9) of the mounting plate (2) in order to convey, in particular optionally, thixotropic material as casting material via the feed corridor (7), and in particular via the passage (6), into the filling chamber (10).

2. Mounting plate (2) according to claim 1 , characterized in that the free space (9) comprises a crossing area between the passage (6) and the supply corridor (7), in particular the crossing area.

3. Mounting plate (2) according to claim 1 or 2, characterized in that the free space (9) is located within the mounting plate (2).

4. Mounting plate (2) according to claim 1 or 2, characterized in that the mounting plate (2) has a recess on a side of the mounting plate (2) facing away from the use of the casting mold (3), wherein the recess forms the free space (9).

5. Set comprising a mounting plate (2) for a die-casting device (1) for rigidly connecting a first casting part of a multi-part mold (3) of the die-casting device (1) to the mounting plate (2), wherein the mounting plate (2) has a passage (6) through the mounting plate (2) for pressing casting material from a filling chamber (10) of the die-casting device (1) through the passage (6) into the mold (3), characterized in that the mounting plate (2) has a feed corridor (7) oriented transversely, in particular orthogonally, to the passage (6), wherein the passage (6) and the feed corridor (7) are connected via a clearance (9) of the mounting plate (2), wherein the set includes a, in particular tubular, first The transfer piece (16) and / or a second transfer piece (8), in particular a tubular one, in order to, in particular optionally, arrange one of the transfer pieces (8, 16) at least partially in the free space (9), wherein the respective transfer piece (8, 16) has the filling chamber (10) or is connectable to the filling chamber (10) in a way that conducts casting material and is designed and can be arranged at least partially in the free space (9) such that, in use, casting material from the filling chamber (10) can be pressed at least section by section through the passage (6) into the mold (3) within the respective transfer piece (8, 16), wherein the first transfer piece (16) has no inlet opening and the second transfer piece (8) has an inlet opening in order to guide thixotropic material supplied via the feed corridor (7) into the filling chamber (10) via the inlet opening.

6. Set according to claim 5, characterized in that the respective transfer piece (8, 16) has a, in particular straight, feedthrough channel (11) in order to guide casting material from the filling chamber (10) via the feedthrough channel (11) at least sectionally through the passage (6) when using the respective transfer piece.

7. Set according to claim 6, characterized in that in the use of the respective transmission piece (8, 16) the respective transmission piece, in particular the feedthrough channel (11), extends along a predominant, preferably entire, length of the passage (6) through the passage (6).

8. Set according to claim 6 or 7, characterized in that the inlet opening of the second transfer piece (8) is connected to the feedthrough channel (11) in a manner that conducts casting material, in order to guide thixotropic material into the filling chamber (10) via the feedthrough channel (11) during use.

9. Set according to one of claims 5 to 8, characterized in that the second transfer piece (8) has a feed channel (12), in particular oriented transversely to the feedthrough channel (11), which is connected to the feedthrough channel (11) in a manner that conducts casting material, in order to guide thixotropic material supplied via the feed corridor (7) in the use of the second transfer piece (8) into the feedthrough channel (11) via the feed channel (12).

10. Set according to one of claims 5 to 9, characterized in that the set comprises a screw-cylinder unit (13) for producing the thixotropic material, wherein the screw-cylinder unit (13) can be arranged such that thixotropic material produced with the screw-cylinder unit (13) in the use of the second transfer piece (8) can be conveyed into the inlet opening.

11. Die-casting device (1) for producing a metallic molded part, wherein the die-casting device (1) comprises a filling chamber (10), a press piston (14) movable in the filling chamber (10), a mounting plate (2), and a first casting mold part of a multi-part mold (3) of the die-casting device (1) connected to the mounting plate (2), wherein the mounting plate (2) has a passage (6) extending through the mounting plate (2) in order to press casting material from the filling chamber (10) through the passage (6) into the mold (3) with the press piston (14), characterized in that the mounting plate (2) has a feed corridor (7) oriented transversely, in particular orthogonally, to the passage (6), wherein the passage (6) and the feed corridor (7) are connected via a free space (9) of the mounting plate (2), wherein the die-casting device (1) comprises a screw-cylinder unit (13) for the production of thixotropic material,wherein the screw-cylinder unit (13) is connected to the filling chamber (10) in a manner that conducts the casting material, so that thixotropic material produced by the screw-cylinder unit (13) can be conveyed into the filling chamber (10) via the feed corridor (7).

12. Die-casting device (1) according to claim 11, characterized in that the die-casting device (1) has a second transfer piece (8) which is arranged at least partially in the free space (9), in particular detachably, wherein the second transfer piece (8) has the filling chamber (10) or is connected to the filling chamber (10) in a way that conducts casting material, so that casting material located in the filling chamber (10) can be pressed at least section by section through the passage (6) from the filling chamber (10) into the mold (3) within the second transfer piece (8).

13. Die-casting device (1) according to claim 12, characterized in that the second transmission piece (8) has an inlet opening, wherein the screw-cylinder unit (13) is connected to the inlet opening in a manner that conducts the casting material, so that from the The thixotropic material produced by the screw-cylinder unit (13) can be conveyed into the filling chamber (10) via the inlet opening.

14. Die-casting device (1) according to one of claims 11 to 13, characterized in that the screw-cylinder unit (13) projects at least partially into the feed corridor (7).

15. Method for producing a metallic molded part with a die-casting device (1) according to one of claims 11 to 14, wherein thixotropic material produced by the screw-cylinder unit (13) is conveyed via the inlet opening into the filling chamber (10), after which the thixotropic material is pressed from the filling chamber (10) through the passage (6) into the mold (3).

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