Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C9/00—Moulds or cores; Moulding processes
  • B22C9/22—Moulds for peculiarly-shaped castings
  • B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
  • B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
  • B22D17/10—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled with horizontal press motion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
  • B22D17/20—Accessories: Details
  • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
  • B22D17/2218—Cooling or heating equipment for dies
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D18/00—Pressure casting; Vacuum casting
  • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
  • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
  • B22D17/20—Accessories: Details
  • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
  • B22D17/20—Accessories: Details
  • B22D17/30—Accessories for supplying molten metal, e.g. in rations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D18/00—Pressure casting; Vacuum casting
  • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould

Definitions

• the invention relates to a method for producing a vehicle wheel made of a light metal material, wherein the light metal material is introduced in liquid form into a mold cavity of a casting mold. Furthermore, the invention relates to a casting mold for the production of a vehicle wheel made of a light metal material, with a mold cavity for receiving the light metal material in liquid form forming moldings and an apparatus for producing a vehicle wheel.
• the basis for driving safety and driving comfort for light-alloy wheels for cars are the unsprung masses, whereby it is crucial that the weight of the wheels is as low as possible. Due to the inertia and the rotational moment one strives to use light wheels. For this reason, on the one hand attempts to constructively implement lightweight construction of wheels. On the other hand, there are efforts to reduce weight through the selection of materials.
• the prior art is currently cast or forged wheels of aluminum or magnesium alloys, which are made to a very high percentage by the low pressure die casting process.
• the fixed clamping plate is adjoined in the axial direction by a casting unit, with which a melt flows through a mold cavity formed perpendicular to the dividing plane, ie through the mold. perpendicular to the parting plane of the two mold halves, is fed through a casting chamber through the fixed platen and the solid mold half of the mold.
• the casting unit has for this purpose a usually hydraulically driven, movable in the casting chamber casting piston.
• an ejection unit is integrated, which is usually also hydraulically driven to ejector ejector pins in the mold to move back and forth. These are passed through the movable platen to sweep the cast parts off the movable mold after opening the mold.
• a core pulling device is present, the machine side, for example, consists of hydraulic cylinders, which are usually mounted on the movable platen, sometimes on the fixed platen.
• the casting process in cold chamber casting plants is known to take place in four successive phases, namely the metering, the prefilling phase, the mold filling phase and the pressing phase.
• the dosage can z. B.
• the dosing times are typically between 3 s and 15 s, depending on the type of dosing and dosing quantity. With a relatively long dosing time there is a risk that a part of the melt already solidifies in the casting chamber.
• the casting piston speed in the prefilling phase can typically be set in a range between 0.2 m / s and 0.6 m / s so that, on the one hand, the melt is conveyed as quickly as possible and, on the other hand, trapped air by overturning one before the other Casting piston constituting shaft of the melt, as far as possible avoided by spray formation and / or by reflection in G manrest Symposium.
• the casting chamber is filled with melt and the casting piston conveys the melt into the vicinity of the gate.
• the mold filling phase is as short as possible; it is usually between 5 ms to 60 ms in duration.
• the casting piston moves the melt at high speed, typically adjustable in a range up to 10 m / s and more.
• high pressures occur due to conversion of the kinetic energy into a pressure pulse, so that there is a risk of the mold being torn open.
• Modern casting machines therefore have means to absorb the kinetic energy towards the end of the filling phase.
• a pressure of 300 bar to 1500 bar, in some cases even more, is generally set by means of a multiplier.
• the melt solidifies under pressure and trapped air during mold filling is compressed under static pressure.
• the proportion of entrapped air in the volume porosity is small.
• the volume porosity is usually made of voids, the cause of which is the insufficient supply of a shrinkage-related portion of the melt in the transition from liquid to solid.
• the gates are usually thin-walled in proportion to the wall thickness of the castings, with the result that the melt in some areas of the casting is still liquid, while it is already partially solidified in the gate area, which is a further desserts no longer possible or at least more difficult.
• the formation of a solidified edge shell in the casting chamber after dosing has the consequence that a portion of the melt neither for the mold filling nor for the make-up of the shrinkage-related portion in the mold cavity is available.
• the pushing out of residual melt from the Gellorest Scheme for make-up requires a high emphasis.
• the high pressures at the end of the mold filling phase and in the holding pressure phase require high holding forces of the mold, which have to be applied via the closing unit of the casting machine.
• the high pressures require a relatively large thickness of the fixed platen and consequently a correspondingly long casting chamber, which in turn limits the filling level in the casting chamber to typically 15% to at most about 70%, with correspondingly large air volume of the casting chamber.
• the conventional orientation of the casting unit relative to the closing unit requires relatively long flow paths of the melt in the casting chamber and in the casting system and often crimping of the casting system or of the anvil.
• the application of high pressures can also lead to an elastic deformation of the solidified G cashrestes and the casting chamber in Gellorest Scheme and thereby for clamping the G manrestes in the casting chamber, so that under certain circumstances, high opening forces are required to tear the casting residue from the casting chamber. This can lead to a high and / or premature wear of the casting chamber and the casting piston.
• the jamming of the casting residue in the casting chamber also often results in the application of an excessive amount of piston lubricant, which can lead to inclusions in the casting.
• the method according to the invention offers the best prerequisites for meeting the above-mentioned increased demands in the methods and systems known from the prior art.
• pressurized casting instead of the previously used Niederbuchkokilleng devisens in vehicle wheels with its limited possibilities or the conventional Kalthuntg intelligent processors for other castings with its current procedural disadvantages
• system-related designs as lightweight and process optimization can be made in addition to various lightweight design optimizations, aerodynamics optimizations and crash optimizations ,
• the tempering of the casting mold according to the invention leads to a very fast and complete filling of the mold cavity, wherein segregation of the liquid light metal material is avoided.
• the solution according to the invention allows a desired temperature level within the mold cavity, so that in addition to the uneven heating of the mold and the associated deformation of the casting chamber is avoided and thus the early solidification of the molten light metal material is prevented in certain areas.
• the piston forces In addition to increasing the service life of the piston and the mold can be reduced in this way, the piston forces.
• Through the use of pressurized casting and the temperature of the mold in different areas to different temperatures occur during the casting very low forces and there is a low turbulence or turbulence-free casting of the vehicle.
• the method according to the invention makes it possible to have very small wall thicknesses or wall thicknesses of up to 1 mm in certain areas of the vehicle wheel, and even less in certain cases.
• the possible reduction in the wall thicknesses makes it possible to design a vehicle wheel which has substantially better properties with respect to the crash behavior than known vehicle wheels.
• the vehicle wheel produced by the method according to the invention can be optimized for a desired crash behavior.
• the visible side of the vehicle wheel can be performed almost completely closed, without the weight of the vehicle is significantly increased.
• the aerodynamics of the vehicle wheel can be significantly improved.
• openings for example for ventilation of a vehicle brake, can be integrated into such a viewing side.
• a strength of the vehicle wheel-increasing structure may be located within such a disc-like design of the visible side.
• the fact that the vehicle wheel can be completed in one casting reduces the machining required after casting by about 80% or more.
• the lower post-processing required produces less waste, which helps to protect the environment.
• the inventive method significantly reduces the casting time and allows a virtually burr-free casting, which also requires less use of raw materials and a lower energy requirement.
• due to the rapid casting and solidification with casting skin an otherwise required thermal aging can be completely or partially eliminated.
• the vehicle wheel produced by the method according to the invention has a low distortion, which also allows the required for a gloss turning fine gradations.
• the lightweight construction achievable with the method according to the invention increases the range of motor vehicles equipped with such vehicle wheels, which contributes to a reduction in the burden on the environment.
• the mold is heated to high temperatures, and in areas where the vehicle has a large cross-section, the mold is heated to low temperatures, so it is ensured that the melt in relatively narrow areas of the mold cavity remains liquid for a sufficient time to prevent premature solidification thereof, and that in comparatively broad areas of the mold cavity, the solidification sets in time. Overall, this results in a uniform solidification of the entire vehicle wheel to be cast.
• the liquid light metal material is introduced at high speed of more than 5 m / s in the mold cavity.
• a ventilation region in which the casting mold is vented is tempered to a substantially lower temperature than the other regions of the casting mold.
• a casting mold according to the invention for producing a vehicle wheel is specified in claim 5.
• the casting mold according to the invention enables a very simple setting of different temperature ranges within the casting mold, so that the respective vehicle wheel to be cast can be produced at the respectively optimal conditions.
• the casting mold according to the invention can be made relatively simple and is always kept at the set temperatures by means of tempering. With regard to setting the desired temperatures at the transition of the casting mold into the mold cavity, it is particularly advantageous if the tempering devices are designed as pressurized water circuits, electric heating cartridges and / or pressurized oil circuits.
• the heat flow and / or the heat flow can be controlled in a relatively simple manner.
• the tempering devices are in operative connection with a control device for controlling and / or regulating the temperatures of the tempered regions. In this way, the temperatures of the individual regions of the mold cavity or of the casting mold can be controlled or regulated very simply.
• an advantageous further development can be that at least two mutually movable molded parts are provided.
• a further advantageous embodiment of the invention may consist in that at least one of the mold parts has a plurality of tuning elements for adjusting the molded part to different temperatures acting on the mold.
• tuning elements By means of these tuning elements, at least one of the molded parts and thereby the entire casting mold with respect to the matching of the individual components can be matched very well, since the tuning elements are suitable for compensating for tolerances between the individual components of the casting mold. In addition, this allows the mold to be used at temperatures other than those for which it has been constructed, thereby achieving a substantial reduction in cost.
• the tuning elements can also be made of different materials and compensate for the different sizes of the components involved depending on the molding production and molding heat input.
• the tuning elements can either isolate the heat or selectively transfer the heat, so that in addition to the molding production and the molding heat input different sizes are compensated and achieved an insulating effect or heat is transferred. Furthermore, the tuning elements are able to absorb and / or dampen the introduced impacts and / or forces in addition to the size compensation.
• a surface change in the form of a tempered labyrinth-like structure and / or at least one cross-sectional change and / or at least one deflection is provided.
• An apparatus for producing a vehicle wheel with such a casting mold is given in claim 1 2.
• the device which may be embodied, for example, in the form of a casting installation, can be used particularly advantageously for carrying out the method according to the invention.
• at least one of the mold parts of the mold is movable by means of at least one not belonging to the mold guide element in the closing direction of the mold relative to a further molded part.
• the guide elements can be used for a variety of molds, so that significant cost savings can be achieved. In this way, moreover, rapid tool changes, d. H. quick change of the moldings of the mold, possible.
• a further advantageous embodiment of the invention may consist in that the molded parts are thermally separated from the same moving guide elements. In this way, an excessive heating of the guide elements is prevented, so that they can not distort and high accuracy in the movement of the components of the device is achieved and disturbances are avoided.
• a further advantageous embodiment of the device may consist in that at least two of the mold parts are movable by means of respective gripping elements in a direction perpendicular to the closing direction. This allows a very fast opening and closing of the mold, whereby the productivity of the device according to the invention can be significantly increased.
• a simple and fast connection of the molded parts with the guiding and / or gripping elements results when at least one of the molded parts can be connected by means of quick-connection devices to the at least one guide element and / or with the gripping elements.
• respective units for supplying the tempering devices are integrated into the device.
• a further advantageous embodiment of the invention may consist in that at least one vacuum unit is provided for the extraction of air from the mold cavity. This vacuum unit allows easy and quick extraction of air from the mold cavity in order to fill it with the liquid light metal material can.
• FIG. 1 shows a side view of a device according to the invention in a first state
• Fig. 2 is a view according to the arrow II of Fig. 1;
• Fig. 3 is a perspective view of the device of Fig. 1;
• FIG. 4 is a side view of the device of FIG. 1 in a second condition
• Fig. 5 is a perspective view of the device of Fig. 4;
• Fig. 6 is a side view of the device of Fig. 1 in a third state;
• Fig. 7 is a perspective view of the device of Fig. 6;
• FIG. 8 is a side view of the device of FIG. 1 in a fourth state
• Fig. 9 is a perspective view of the device of Fig. 8.
• Fig. 1 1 is another view of part of the mold according to the invention.
• FIG. 12 is another view of part of the mold according to the invention.
• Figures 1 to 9 show various views of an apparatus 1 for producing a vehicle wheel 2 shown in Figures 6 to 9 by means of pressurized casting.
• the vehicle wheel 2 can basically have any size and shape.
• the vehicle wheel 2 to be recognized in FIGS. 6 to 9 is therefore to be regarded as purely exemplary.
• a light metal material is used, preferably an aluminum or magnesium material.
• known light-metal materials suitable for the method described below for the production of the vehicle wheel 2 can be used.
• the device 1 has a casting mold 3, which is in the representation of Figures 1, 2 and 3 in a closed position.
• the casting mold 3 has four mold parts, namely a rigid mold half 4, a movable mold half 5, an upper slide 6 and a lower slide 7.
• the moldings of the mold 3 can be accommodated with or without a zero point system and they can have a very smooth and high quality surface, which need not or only to a very small extent with a sizing or the like must be treated, so that there is a very high surface quality of the vehicle wheel 2.
• the mold 3 may also have more than the four molded parts described and illustrated herein.
• the movable mold parts that is to say the movable mold half 5, the upper slide 6 and the lower slide 7, are in the states according to FIGS. 4 and 5 by means of respective guide elements described below from the state illustrated in FIGS. 1, 2 and 3. 6 and 7 and 8 and 9 can be brought. All of these guide elements described below are part of the device 1 and do not belong to the mold. 3
• the guide columns 8 form doing a guide for the movable platen 9 and take the horizontal closing forces during casting.
• the rigid mold half 4 is attached to a fixed platen 12, which is connected to a pouring unit 13, which serves the liquid light metal material in a formed between the mold parts of the mold 3 mold cavity 14, in a conventional manner, the negative mold of the vehicle to be produced 2, to initiate.
• the filling of the mold cavity 14 with the liquid light metal material takes place in particular from the outer periphery of the mold cavity 14 ago.
• the casting mold 3 is preferably designed such that when the liquid light metal material is introduced into the mold cavity 14, spraying of the material is avoided.
• the liquid light metal material is introduced at relatively low pressure of up to 100 bar or slightly more into the mold cavity 14.
• the clamping force is generated by the movable platen 9 and the fixed platen 12, on which the movable platen 9 is supported.
• the drive elements or devices serving for moving the movable platen 9 can have, for example, hydraulic cylinders and / or toggle or form-locking elements.
• the mold 3 can be clamped by means of manual, semi-automatic or fully automatic clamping elements on form and / or adhesion.
• the fixed platen 12 may include a die sprayer, not shown, and / or an integrated pressure medium system.
• the upper slider 6 can be brought from its position shown in FIG. 1 or FIG. 4 into the position shown in FIG. 6 by means of an upper gripper element 15 in which the upper slider 6 moves vertically upwards relative to the movable mold half 5 has been.
• the lower slide 7 can also be displaced downwardly from its position shown in FIGS. 1 and 4 to its position shown in FIG. 6 by means of a lower gripper element 16 relative to the movable mold half 5.
• the gripping elements 15 and 16 and the movable platen 9 can be operated manually, semi-automatically or fully automatically.
• the two gripping elements 15 and 16 also represent guide elements for the mold 3.
• the guide elements for moving the moldings of the mold 3 can be equipped in a manner not shown with a pressure medium.
• the upper slide 6 and the lower slide 7 are moved in the vertical direction, it would also be possible to separate the mold 3 in the vertical direction in the region of the two slides 6 and 7 and thus the two slides in the horizontal direction to move.
• the two gripping elements 15 and 16 would be left and right gripping elements in this case.
• the two slides 6 and 7 by means respective gripper elements 15 and 16 moves in a direction perpendicular to the closing direction x direction.
• the light metal material is therefore introduced into the mold cavity 14 of the casting mold 3 in liquid form by means of the casting unit 13.
• This introduction of the liquid light metal material takes place at a high speed of more than 5 m / s. This high speed is achieved by a corresponding movement of a piston, not shown, of the casting unit 13.
• the vehicle wheel 2 is produced by means of pressurized casting, wherein the casting mold 3 is tempered in different areas to different temperatures. This different tempering of the casting mold 3 will be described in more detail by means of an example at a later time.
• the mold 3 is heated to high temperatures and in areas in which the vehicle wheel 2 has a large cross-section, the mold 3 is heated to low temperatures. Due to the temperature of the casting mold 3, the solidification behavior of the liquid light metal material can be controlled or adjusted, although the vehicle wheel 2 has very different cross-sections. Furthermore, a region in which the casting mold 3 is vented is tempered to a substantially lower temperature than the other regions of the casting mold 3. This area, in which the mold 3 is vented, will also be described in more detail later.
• the moldings of the mold 3, that is, the rigid mold half 4, the movable mold half 5, the upper slide 6 and the lower slide 7, may be wholly or partly made of different materials.
• the selection of the materials of the individual molded parts can be effected as a function of the temperatures to be set during the temperature control of the casting mold 3.
• the molded parts are moved apart in the manner described above in order to open the casting mold 3.
• the ejector unit 17 has a hydraulic unit 18, which ensures the movement of the ejector unit 17 in a manner known per se.
• the mold 3 After ejection of the vehicle wheel 2 from the mold 3, the mold 3 in the reverse direction, ie from the state according to the figures 8 and 9 on the state according to the figures 6 and 7, the state according to the 4 and 5 in the state shown in Figures 1, 2 and 3 are brought to produce the next vehicle wheel 2 by introducing the liquid light metal material into the mold cavity 14.
• the illustrated vehicle wheel 2 can of course be connected to a tire to be filled with air or gas, not shown.
• the vehicle wheel 2 can also consist of several individual parts, which can also be produced by the method described herein.
• FIG. 10 also shows that the upper slide 6 and the lower slide 7 are connected to the upper gripping element 15 and the lower gripper element 16 by means of quick connection devices 19 and 20, respectively, with which a rapid connection of the devices belonging to the device 1 Guide elements with the mold parts belonging to the mold 3 is possible to ensure a rapid opening or closing of the mold 3 by moving the mold parts relative to each other, as described above.
• the upper slide 6, the lower slide 7 and the movable mold half 5 are thermally separated from the corresponding guide elements, ie the upper gripping element 15, the lower gripping element 16 and the movable clamping plate 9.
• corresponding insulating elements 21 are provided, which can not all be recognized due to the sectional profile and which may also be provided between the rigid mold half 4 and the fixed platen 12. This thermal separation of the molded parts from the guide elements prevents unintentional heating of the guide elements, so that the function of the device 1 with respect to the opening and closing of the casting mold 3 is ensured even with temperature changes.
• a plurality of tempering can be seen, with which the mold 3 can be heated to different temperatures to allow uniform solidification of the light metal material within the mold cavity 14.
• the tempering devices are preferably pressurized water circuits, of which a plurality of bores 22 can be seen in FIG. 10, electric heating cartridges 23 and pressurized oil circuits, of which several bores 24 are also shown in FIG. 10.
• other heating or cooling elements can be used as tempering.
• the tempering, ie the pressurized water circuits, the electric heating cartridges 23 and / or the pressure oil circuits are connected to a Fig. 10 also shown control device 25, so that the temperatures of the tempered by the tempering areas can be controlled and / or regulated.
• the control device 25 can also be in operative connection with temperature sensors, not shown, which measure the actual temperature of the individual parts of the mold 3 and thus allow a correct adjustment of the temperature.
• the control device 25 is also able to monitor the molding or zone temperatures in addition to other process data and / or geographical data and / or other monitoring information and to transmit to a higher-level system, such as a machine control.
• a higher-level system such as a machine control.
• the casting mold 3 can be tempered in a controlled manner during production and / or for preheating, wherein all influencing parameters, such as different thermal expansions of the components involved, can be monitored and controlled based on the different temperatures and thermal expansion coefficients of the molded parts.
• the tempering of the casting mold 3 can of course be designed differently for each individual casting mold and thus for each individual vehicle wheel 2 to be produced with the casting mold 3 or the device 1.
• FIGS. 1, 4, 6 and 8 very schematically show assemblies 26 which serve to supply the tempering devices for tempering the casting mold 3 and which are integrated into the device 1.
• the units 26 are shown as integrated into the rails 1 1.
• the aggregates 26 may, however, also be located or attached at other positions within the device 1.
• FIGS. 1, 4, 6 and 8 show a vacuum unit 27 which serves to extract air from the mold cavity 14.
• the negative pressure unit 27, with which a corresponding negative pressure is generated, is integrated into the device 1 and again shown purely by way of example in the rails 1 1.
• the connection of the aggregates 26 with the tempering and the connection of the vacuum unit 27 with the mold cavity 14 are not shown in the figures; These can be done in a variety of ways known to those skilled in the art.
• FIG. 11 shows a perspective view of a part of the casting mold 3, in which the upper slide 6, the lower slide 7, the movable mold half 5, the control device 25 as well as a part of the mold cavity 14 can be seen. Also, the two gripping elements 15 and 16 and their connection to the two slides 6 and 7 can be clearly seen in Fig. 1 1. Furthermore 1, that at least one of the molded parts, in the present case, both the upper slide 6 and the lower slide 7 has a plurality of tuning elements 28, with which the mold parts can be matched. In the present case, the two slides 6 and 7 are matched to the rigid mold half 4, not shown in FIG. 1 1, by means of the tuning elements 28. As a result, inevitably resulting tolerance deviations can be compensated in the production of the individual moldings.
• tuning elements 28 serve to adjust the molded parts of the casting mold 3 to different temperatures acting on the casting mold 3.
• the tuning elements 28, which may also be referred to as inserts, may be made of a different material than the slides 6 and 7, respectively, in which they are arranged.
• the tuning elements 28 which have a wide variety of strengths and may also be designed as a tuning cylinder, it is possible to match the mold 3 in separation areas between the mold parts of the mold 3 so that all moldings remain the same even under explosive pressure to escape to prevent the liquid light metal material. Thereby, the mold parts of the mold 3 can be adjusted with their temperature zones so that in the production of the vehicle wheels 2 in addition to the technological and economic claim that inevitably results in vehicle wheels 2, and the technological and economic execution of the mold 3 in connection with the problems , which results in conventional molds, care is taken.
• the tuning elements 28 may also be revised or replaced after appropriate testing, so that a secure sealing of the mold 3 is ensured.
• Fig. 12 is a view of another mold part of the mold 3 is shown, namely on the rigid mold half 4. This has a subsequent to the mold cavity 14 vent area 29, to which at the beginning of the casting process within the mold cavity 14 located air can escape.
• the vent area is, as already mentioned, tempered to a substantially lower temperature than the other areas of the casting mold 3.
• a tempered, labyrinth-like structure 30 is provided in the venting region 29, which makes it difficult for the liquid light metal material to escape from the mold cavity 14.
• the region 29 can also have cross-sectional changes, surface enlargements or surface reductions and / or deflections.
• the venting area 29 or a venting element 29 forming the venting element may be made of a different material than the other components of the mold 3.
• copper materials, such as brass or bronze, for the vent area 29th be used.
• the same or similar ventilation areas as the ventilation area 29 may be located at other locations of the mold cavity 14.
• the ventilation region 29, which can also be referred to as a venting unit, by its own thermal management in conjunction with the described geometric shape allows the liquid light metal material itself braking system, so that, depending on the requirements variable with a full cross-section or reduced cross-section over one or more Bores 31 a connection to the vacuum unit 27 can be controlled specifically to be able to realize in this way short venting distances.
• Some of these ventilation areas 29 may also be provided with vacuum valve connection or without subsequent vacuum connection can be used to serve the casting mold 3 in whole or in part as an overflow.
• a closed belt or ring 32 can be seen, which is formed by an offset of the planes of the rigid mold half 4.
• the tuning elements 28 On the ring 32 are in the closed state of the mold 3, the tuning elements 28 to ensure the tightness of the mold 3.
• the ring 32 thus absorbs the forces occurring during casting.

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• 2018
  • 2018-09-10 JP JP2020535304A patent/JP7247198B2/ja active Active
  • 2018-09-10 CN CN201880072613.2A patent/CN111344089A/zh active Pending
  • 2018-09-10 BR BR112020004687-6A patent/BR112020004687B1/pt active IP Right Grant
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  • 2018-09-10 US US16/646,563 patent/US20200269312A1/en not_active Abandoned
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