EP2527060A1 - Procédé de coulée pour moules permanents - Google Patents

Procédé de coulée pour moules permanents Download PDF

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Publication number
EP2527060A1
EP2527060A1 EP11167276A EP11167276A EP2527060A1 EP 2527060 A1 EP2527060 A1 EP 2527060A1 EP 11167276 A EP11167276 A EP 11167276A EP 11167276 A EP11167276 A EP 11167276A EP 2527060 A1 EP2527060 A1 EP 2527060A1
Authority
EP
European Patent Office
Prior art keywords
casting
permanent
permanent mold
cooling
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11167276A
Other languages
German (de)
English (en)
Inventor
Hans Mikota
Markus Bühringer
Werner Menk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEORG FISCHER KOKILLENGUSS GMBH
Original Assignee
Georg Fischer Automobilguss GmbH Austria
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Georg Fischer Automobilguss GmbH Austria filed Critical Georg Fischer Automobilguss GmbH Austria
Priority to EP11167276A priority Critical patent/EP2527060A1/fr
Priority to PCT/EP2012/058703 priority patent/WO2012159898A1/fr
Publication of EP2527060A1 publication Critical patent/EP2527060A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D30/00—Cooling castings, not restricted to casting processes covered by a single main group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/065—Cooling or heating equipment for moulds
    • 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
    • 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
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots

Definitions

  • the present invention relates to a casting method with permanent molds according to the preamble of claim 1 and a casting apparatus according to the preamble of claim 4.
  • the solidification in sand molds proceeds more slowly, whereby the formation of the microstructure matrix in sand molds is coarser (higher DAS) and lower mechanical properties are achievable compared to mold casting.
  • Metallic permanent molds such as chill molds
  • the edge shells i.e., the first solidified portions of castings in direct contact with the metal mold
  • the heat is dissipated by the solidifying metal over several phase boundaries.
  • the heat must be from the solidifying component away over several, sometimes heat-insulating layers (eg, heat-insulating sizing, air gap) are transported through the mold.
  • Equation 1 describes the heat flow per unit time over these phase boundaries.
  • Q point k * A * .DELTA.T W
  • cooling can be used to reduce the temperature of the permanent mold and to keep the heat flow high through a high temperature gradient between the casting and the mold.
  • a special variant of sand casting is described under the name "Abiation” in the literature and eg in the WO 2004/026504 A1 or WO 2004/004948 A2 published. It is a sand casting process, more specifically a core package process. The mold is made here by several sand cores, which are assembled into a core package.
  • the edge shell formation takes place by the heat transfer of the liquid metal to the sand mold.
  • the core shape can be resolved by a jet of water.
  • a phase fast solidification progress in the interior of the component This is caused by the strong cooling effect of the water jet applied directly to the surface of the solidifying component.
  • the products produced by this process are characterized by a coarse structure on the outer skin of the component that becomes finer on the inside.
  • a disadvantage of the ablation-casting process is the initial - compared to Kokillengiessvon - slower Randschalenerstarrung and thus near the surface coarser structure. On the surface of the component, this method thus achieves the structure typical for sand casting processes. Thanks to the ablation-casting process, it is not until inside the component that the direct cooling attainable achievable high material properties. However, this is disadvantageous, in particular in the case of component applications which are subject to static and dynamic strength stresses, because here usually the edge fibers or edge regions of the components are subjected to the highest static and dynamic load and thus require the best solidification conditions and lowest DAS with the best mechanical properties.
  • Another disadvantage is the relatively poor efficiency of Ablationsvons due to the complex production of the required molds.
  • Each individual component of the core package is to be produced via a core to be produced in a core shooting process.
  • these individual cores must be laboriously assembled to the core package before each casting.
  • the core package is destroyed during casting by flushing with water and can only be used once.
  • the core sand is after unpacking with water only in poorly processed further form of turbidity.
  • the sand can only be returned to the casting process after elaborate and energy-intensive treatment processes.
  • Semi-continuous casting processes are also used for the production of semi-finished products such as continuous cast ingots or sheets.
  • a widely used process variant of continuous casting is known as a direct-chill casting process.
  • This (semi-) continuous casting process is characterized by excellent material properties.
  • the edge shell solidification is followed by a phase of very rapid heat removal by the direct action of the water jet on the surface of the solidifying aluminum.
  • the first phase of continuous casting i. the solidification and the formation of the peripheral shell, by very fast cooling conditions, since the liquid metal is in direct contact with a metal mold and thereby also the edge fibers are strongly cooled.
  • a disadvantage of the continuous casting process or the direct chill casting process is that it has so far been available only as a (semi) continuous casting process for the production of semi-finished products such as bolts, profiles, sheets or slabs.
  • the production of geometrically complex components from materials produced by direct chill casting has hitherto only been possible by means of subsequent joining processes (welding, gluing, assembly) and forming processes (for example forging processes) and correspondingly very complex.
  • the present invention is therefore an object of the invention to improve the cooling process during mold casting with permanent molds such that higher solidification speeds are made possible, on the one hand significantly reduces the cycle time and on the other hand castings can be made with finer microstructure.
  • a permanent mold is made up of at least two molded parts. Non-demoulding undercut areas of components can be realized via additional attached to the mold movable slides or sand cores.
  • the phase of mold filling is followed by a phase of very good heat removal by wetting the permanent mold with liquid metal.
  • a phase of lower heat transport sets in, since the edge shell separates from the permanent shape due to the volume contraction and a heat-insulating air gap is formed, which causes rapid solidification with the previously described disadvantages for component quality (coarser Microstructure matrix) and the economy (long cycle time) prevented.
  • the casting method according to the invention makes use of the effect of edge shell formation: after local formation of an edge shell on the casting, the corresponding molding segment is lifted off the component and partially demolded. Simultaneous with local demolding, direct cooling of the exposed component surface via cooling media, such as e.g. by directly sprayed water, water spray or by flooding the entire exposed area with cooling medium.
  • cooling media such as e.g. by directly sprayed water, water spray or by flooding the entire exposed area with cooling medium.
  • Another advantage is the fact that the formation of a heat-insulating air gap between the cooling medium and casting actually is anticipated. For the first time in casting with permanent molds, the negative effects of the insulating air gap between the casting and the permanent mold can be eliminated on the heat dissipation.
  • the permanent form is divided into several movable segments. This division is not necessarily the formation of undercut areas on the component, but this does not exclude.
  • the total heat transfer coefficient k is therefore only more dependent on ⁇ 3 (heat transfer coefficient casting on the cooling medium). Two of the formerly three individual resistors are 0 and thus no longer affect the heat flow.
  • the solidification rate can be maintained even for the phase of edge shell formation by the use of permanent metal molds instead of sand molds.
  • finer structures can be achieved in the peripheral shell area than in processes using sand molds (especially in the ablation process in the sand casting process).
  • a better dimensional stability is achieved by the use of a segmented permanent mold than with sand casting.
  • the sand casting process eliminates the elaborate manufacturing process for the preforms (cores) and the processing of waste.
  • cooling design Both open-type cooling systems, e.g. operated in the evaporator mode, as well as closed cooling circuits, e.g. with flooding of the exposed casting surface.
  • the inventive cooling design can be designed such that the cooling device with the cooling medium first forms a closed cooling circuit as a mold cooling device and the cooling medium is applied directly to the partially exposed Guß Swissober Design at full or partial moving away a Kokillensegmentes, while an open cooling (the cooling medium is rinsed away or evaporated) or continued closed cooling is formed (the exposed casting surface is flooded, but the cooling medium can not drain and also forms a closed cooling circuit with the cooling medium inflow and outflow).
  • the casting method for permanent molds according to the invention will be described by way of example first with the schematic FIGS. 1 to 10 be explained.
  • the permanent mold from which the mold is shaped, according to the invention consists of several mold segments.
  • the permanent form consists of three shape segments.
  • the two mold halves 1 and 2 are shown (upper mold part 1 and the lower mold part 2), wherein the upper mold part 1 according to the invention still comprises the mold segment 4, in contrast to conventional permanent mold halves.
  • the permanent mold may consist of 4 or more mold segments.
  • the upper mold part 1 consists of more than 2 mold segments or that the lower mold part 2 has several permanent mold segments.
  • the actual mold or cavity 5 is formed in which the liquid metal is to solidify into a casting.
  • the process step of closing the mold ( Fig. 1 ) in the FIG. 2 illustrated filling of the mold or cavity 5 with a molten metal (shown wavy hatched). Immediately after or simultaneously with the filling of the casting mold 5 with the molten metal, cooling 3 of the permanent mold segments can be switched on.
  • the individual Kokillenkühlept can all at the same time or, as from the transition from the FIG. 2 to FIG. 3 recognizable, be switched on sequentially.
  • the liquid metal begins to solidify by the inevitably occurring heat transfer or heat dissipation of the liquid molten metal to the mold or permanent mold.
  • the first areas of solidifying metal arise in the areas of the mold with a large surface to volume ratio, since in these areas the heat dissipation is greatest. Typically, these are thin-walled areas of the casting or of the subsequent casting.
  • the metal usually also initially solidifies on the outer edge of the casting mold, while the inner region initially remains liquid or soft.
  • first edge shells 6 are formed or the process step of edge shell formation begins (see marginal shell 6 in FIG. 3 ). Even if the solidification process is already favored thanks to the permanent molds (good heat transfer and thus removal), which are usually made of metal, the solidification process and thus the edge shell formation can of course be significantly accelerated by the use of one or more mold cooling devices 3.
  • the significantly faster cooling and solidification of the resulting casting is indicated schematically by the growing edge shell 6 thanks to the cooling method according to the invention.
  • the cooling process according to the invention is also further supported by the mold cooling 3 which preferably continues to operate in this process stage.
  • the cooling process according to the invention is preferably continued until edge shells have formed around the entire casting 8 ( FIG. 7 ).
  • the previously mentioned mold cooling 3 can also be prematurely switched off at a certain point in the solidification process of the casting (cf. FIG. 7 with Kokillenkühlung 3 out of service, while the direct component cooling 7 is still in operation). This can be particularly advantageous if it can be prevented that the permanent mold halves or permanent mold segments cool down too much. An additional heating process in preparation for the next casting process can be avoided in whole or in part.
  • the permanent mold halves can be opened (see FIG. 8 ) and the casting 8 taken out be (see FIG. 9 ).
  • the casting process is completed and can start anew for the production of another casting (cf. FIG. 10 ).
  • FIGS. 11 to 21 Various permanent molds developed specifically for the application of the casting method according to the invention are shown. These are of particular suitability for the implementation of the casting method according to the invention and enable the efficient implementation or realization of the inventive idea.
  • FIGS. 11 and 12 shows a first variant of a specially developed for the implementation of the inventive casting permanent mold.
  • the permanent mold shown in these figures is formed by 2 permanent mold segments 9 and 9 '(segment 9' is not shown) and two slides 10 and 11.
  • the slide 10 is a cooled slide, ie it has a built-in cooling device 12.
  • This cooling device consists in the present example of several cooling channels 13, 14.
  • the cooling channel 14 forms the coolant flow, the two outer Cooling channels 13 the coolant outlet.
  • the cooling channels of the cooling device 12 in the slider 10 are configured in the present embodiment such that the cooling channel 14 are connected to the two cooling channels 13 via the short connecting channels 15 in the slider 11.
  • the openings of the cooling channels 13 and 14 are arranged in alignment with the openings of the two connecting channels 15 so that they - as in the FIG. 11 shown - in the state of a closed mold (closed permanent mold segments or slide) together represent a positive, dense cooling circuit.
  • the short connecting channels 15 contained in the slide 11 is dispensed with.
  • the slider 10 may have one or more grooves on its surface in contact with the second slider 11. These grooves would in the closed state (both slide) with the in contact Form surface of the slide 11 form-fitting, dense channels and so take over the function of the short connection channels 15, ie the cooling channel 14 with the other cooling channels 13 connect.
  • the manufacturing costs of the slider 11 can be reduced.
  • cooling circuit can be used as a cooling medium, for example, water, oil or a water-oil mixture.
  • a cooling medium for example, water, oil or a water-oil mixture.
  • the cooling circuit of the cooling device 12 is connected to an external (not shown here) heat exchanger.
  • FIG. 11 shows the cooling device 12 only schematically. It is therefore quite conceivable that a plurality of cooling channels 14 are provided for the coolant flow and above all a plurality of cooling channels 13 for the coolant outflow.
  • the coolant channels can be arranged uniformly distributed, for example, for optimal cooling below the surface of the slider 10 in the region of the cavity 5.
  • the mold cavity 5 is first formed with liquid metal (into the FIGS. 11 and 12 hatched).
  • the cooling device 12 of the slider 10 can be switched on, which - as in the FIG. 11 shown - forms a closed cooling circuit.
  • the switched on cooling device 12 causes increased heat dissipation, so that the liquid metal in the region of the cooled slide 10 solidifies faster and thus relatively quickly forms a region with a solid edge shell of solidified metal.
  • this trained edge shell is stable enough around the slider 10, the slider can be partially moved away from the previously closed state, ie ?tformt (see FIG. 12 ).
  • the closed cooling circuit of the cooling device 12 preferably still remains in operation, of course. This is in the FIG. 12 schematically represented by the arrows on the cooling channels 13 and 14 of the cooling device 12 of the slider 10.
  • the solidification process according to the invention is substantially accelerated. This results in the aforementioned better structural properties in the cast component and a significant cycle time reduction (higher productivity of the casting apparatus).
  • FIGS. 13 and 14 show a further variant of a specially developed for the implementation of the inventive casting permanent mold.
  • the work and operation of the permanent mold shown in these figures is up to two differences analogous to the permanent form of FIGS. 11 and 12 :
  • the slide 16 does not have a cooling device which can be operated during the actual casting process, but instead it is provided with integrated nozzle openings 25 for acting upon the casting surface with a cooling medium 21.
  • the cooling circuit in the permanent version of the FIGS. 13 and 14 open and not closed.
  • the permanent mold is formed here essentially by the two permanent mold segments 17 and the slide 16, which define the cavity or casting mold 5.
  • the slider 16 has integrated cooling channels 18, which may be configured, for example, as simple holes.
  • the cooling channels are pressurized via an external - not shown - device with a suitable cooling medium under pressure.
  • the permanent mold is in the closed state, so are the openings 25 of the cooling channels 18 which are located on the surface of the slide 16, positively sealed by the permanent mold segments 17. That is, in the closed state of the permanent form according to FIG. 13 no cooling medium flows and there is no additional cooling through the cooling channels 18 instead.
  • the cavity 5 formed in a form-fitting manner is first filled with liquid metal (into the FIGS. 13 and 14 hatched).
  • liquid metal into the FIGS. 13 and 14 hatched.
  • the cooling channels 18 with the openings 25 are arranged in such a way that the cooling medium 21 exiting, for example as a spray jet or spray mist, impinges on the exposed casting surface (see schematic representation in FIG FIG. 14 ) and thus the latter directly cools, thereby significantly accelerating the solidification process.
  • this second variant of the permanent mold according to the invention has no closed cooling circuit but an open cooling circuit. That is, the cooling medium 21 in the FIG. 14 exits, may evaporate partially and must be removed.
  • the cooling device shown by the two cooling channels 18 in this second variant also does not work as long as the permanent mold is shot, because the openings 25 are positively closed in this state.
  • An advantage of this second variant of the permanent mold according to the invention is its simpler construction method and, in particular, that its cooling circuit is open and uses it virtually automatically during part removal.
  • the cooling channels 18 are not designed as bores in the slide 16, but as hose connections (eg made of metal) whose exit openings are preferably also closed in a form-locking manner as long as the permanent mold is closed.
  • hose connections instead of holes in the slide 16 allows, inter alia, a cheaper production of Permanent shape and easier alignment of the exiting cooling medium jet 21 at the openings 25th
  • the slider 16 of the second, in the FIGS. 13 and 14 variant shown have an additional cooling circuit, which forms a closed cooling circuit, as long as the permanent form is closed or the openings 18 are positively locked.
  • the slider 16 of the second, in the FIGS. 13 and 14 variant shown have an additional cooling circuit, which forms a closed cooling circuit, as long as the permanent form is closed or the openings 18 are positively locked.
  • the cooling medium exits in the manner described above and cools the exposed casting surface in an open cooling circuit, while the additionally provided connection or bore in the slide 16 becomes ineffective.
  • FIGS. 15 and 16 show a further variant of a permanent mold according to the invention.
  • the openings 25 of the cooling channels 20 in a simple manner by the moving away of the slide 19 sequentially - that is, depending on the position of the slide 19 - put into operation. This may be advantageous if one wants to control the cooling effect exerted on the casting over the amount of the exiting cooling medium 21.
  • the casting to be cooled is also better wetted or sprayed with the cooling medium 21.
  • FIGS. 17 to 21 show the typical process steps, which with the According to the invention, the casting method and a casting device or permanent mold according to the invention are passed through.
  • a mold casting apparatus is shown.
  • the slider 22 has inter alia a temperature sensor 23 which serves to determine the surface temperature in the adjacent region of the casting mold 5.
  • the temperature sensor 23 is metrologically connected to a controller 24 which cooperates with a mechanism (not shown) for removing the slider 22.
  • the controller 24 is intended, in particular, to move the slider 22 partially or completely away from the closed state as a function of the surface temperature of the casting surface arising in the cavity 5 as a function of the temperature sensor 23 and thus part of the casting surface for the purpose of direct cooling medium admission release.
  • the slider 22 has in the device according to the FIGS. 17 to 21
  • a cooling device 12 with a closed cooling circuit which analogous to the previous description of the cooling device of Fig. 11 works.
  • the cooling circuit of the cooling device 12 in the FIGS. 17 to 21 however, remains closed at all times, so that the cooling medium used therein never comes into direct contact with the casting surface either.
  • the inventive casting of the FIGS. 17 to 21 has in its two permanent mold segments 17 and in the slide 22 cooling channels 20, which analogous to the embodiment of FIGS. 15 and 16 function.
  • the cooling channels 20 may - but need not - already be filled with a pressurized cooling medium in the state of the closed permanent mold. If the permanent mold is in the aforementioned closed state, then the outlet openings 25 of the cooling channels 20 are closed in a form-fitting manner, as in the preceding examples.
  • the liquid metal is filled in the cavity 5 in a conventional manner.
  • the actual mold filling process of the permanent mold with liquid metal is state of the art and takes place as in the preceding examples. Thanks to the temperature sensor 23 and the associated control 24, however, it is possible here to measure the complete filling of the cavity 5 with liquid metal as an increase in temperature and thus to confirm that the temperature measured by the temperature sensor 23 exceeds a minimum temperature T full (see arrow in the control 24 of the Fig. 17 ), this can be interpreted by the controller 24 as proof of the complete filling of the mold 5.
  • the melt or the metal in the cavity 5 cools relatively quickly. If the measured temperature falls below a predetermined value T - as in the FIG. 19 shown - so gives the control 24 of the slide actuator or the mechanism for moving the slider 22 in a second method step, the signal to pull the slider 22.
  • T demoulding must correspond to a temperature range at which it can be assumed that a sufficiently stable edge shell has formed behind the immediate casting surface for the partial demoulding of the casting. With the moving away of the slider 22 not only a part of the casting surface is exposed, but also the openings 25 of the cooling channels 20.
  • cooling channels 20 with a Cooling medium filled under pressure, so the cooling medium occurs at the same time with the exposure of the openings and thus cools directly the exposed casting surface.
  • the illustrated casting apparatus it is basically possible to sequentially release the openings of the cooling channels 20 and thereby to gradually increase the cooling effect.
  • the cooling channels 20 need not be filled with a cooling medium all the time and be under pressure. It is also conceivable that the cooling channels 20 are empty in the first method step and only in the second method step according to FIG. 19 be flooded with an externally supplied cooling medium for cooling the exposed casting surface.
  • the controller 24 may be designed accordingly.
  • FIG. 20 already shows a third process step in which the measured temperature by means of sensor 23 (see arrow in the controller 24) has fallen below a certain value T min on the surface of the slider 22. If the controller 24 determines that this value T min is undershot, it takes the cooling device 12 of the slide 22 out of operation. By this measure, it is prevented that the slider 22 cools down too much. If, for example, continuous-form segments are cooled too much, mold-filling problems or casting defects can occur during the next casting process. However, while the cooling device 12 is turned off, the casting is still cooled directly with the cooling medium 21. The cooling circuit of the cooling medium 21 is open here, ie, the cooling medium 21 runs out of the casting device and must - which is not evaporated - are dissipated.
  • the last process step is shown: If the casting has cooled sufficiently and thus solidifies, the further charge of the casting with the cooling medium 21 from the cooling channels 20 can be turned off. The two permanent mold segments 17 can be opened and the casting removed. The casting device is thus ready for a new casting process.
  • controller 24 of the inventive casting apparatus also can be made simpler.
  • cooling medium impingement can also be done by flooding the entire exposed casting surface with the cooling medium, thereby accelerating the solidification process of the casting.
  • further permanent mold segments can be locally removed from the mold according to the solidification progress.
  • the thus additionally exposed, solid edge shells of the casting can also be acted upon with the cooling medium to To further accelerate the solidification process of the casting.
  • individual permanent-mold segments-in particular so-called slides-can have a cooling device.
  • these cooling devices are switched on after filling the permanent mold or its cavity with liquid metal.
  • cooling devices can be switched on individually or sequentially.
  • the cooling devices of those permanent mold segments are first switched on, which are to be moved or removed in a later method step (so-called slide).
  • the invention also includes a casting device which is suitable for the application of the casting method.
  • a casting device which is suitable for the application of the casting method.
  • the casting device has a mechanism for removing individual permanent mold segments or slides, which serve for local premature demolding of solidified casting mold areas.
  • These permanent mold segments or slides which can be removed by the mechanism or slide actuator system, can have one or more temperature sensors for determining the surface temperature in the region of the casting mold.
  • the slider or permanent mold segment which is removable by the mechanism, has its own cooling device.
  • this cooling device is preferably used as the cooling medium water, oil or a water-oil Geschmisch.
  • other permanent mold segments particularly preferably have cooling devices which preferably also use water, oil or a water / oil mixture as the cooling medium.
  • the casting apparatus can also be a Have control that controls the mechanism for removing individual Treasureformsegmente.
  • this control for example, the mechanism or the actuators for the removal of individual Dauerformsegmente (slider) as a function of a measured surface temperature or time-dependent control.
  • the casting device also includes a permanent mold according to the invention, which is essentially formed from at least two permanent mold segments forming the permanent mold.
  • a cooling device is provided in at least one of the permanent mold segments. Among other things, this can consist of one or more cooling channels assigned to the permanent mold segment or integrated therein for the transport of a cooling medium.
  • the openings of these cooling channels are arranged such that they are positively and thus tightly in the closed state, as long as the permanent mold segments or the slide with the other permanent mold segments are in the closed and permanent forming state and that the openings of these cooling channels are exposed, as soon as one of the permanent mold segments or the slide is moved from the closed state.
  • the openings of these cooling channels can be arranged on the surface of the permanent mold segment or of the slide such that, with the opening exposed and pressurized loading of the cooling channels with a cooling medium, the cooling medium in the direction Casting surface or cavity conveys, eg is sprayed on.
  • the cooling channels can also be formed by lines introduced on or in the surface of the permanent mold segment, preferably hoses or grooves.
  • the openings of these lines can in this case be arranged on the surface of the permanent mold segment such that, with the opening exposed and pressurized transport of a cooling medium in the lines or grooves, the cooling medium is conveyed in the direction of casting or cavity for the purpose of direct cooling.
  • the cooling device in the slide or in the permanent mold segments consists of at least two cooling channels. This is certainly a cooling channel as the cooling medium inflow and certainly a cooling channel as a cooling medium outflow.
  • the cooling channels may be arranged such that, when the permanent mold segments or the slide with the other permanent mold segments are in the positively closed and permanent mold-forming state, said cooling channels form a closed cooling circuit in or on the permanent mold segments.
  • a further variant of the casting method according to the invention is the use of one or more so-called "lost mold segments” instead of the individual permanent mold segments to be removed.
  • Lost mold segments are preferably sand casting segments.
  • the so-called "lost molding segment” is simply washed away with the cooling medium at this point. This results in a particularly simple casting device, because this does not require a special mechanism for the removal of individual Mamaformsegmente as in the aforementioned variants of the invention.
  • the premature, local partial removal occurs simply by flushing away the (lost) mold segments to be removed. In contrast to the ablation process, where the entire sand mold is washed away, however, it is still possible to work here with permanent molds.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP11167276A 2011-05-24 2011-05-24 Procédé de coulée pour moules permanents Withdrawn EP2527060A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11167276A EP2527060A1 (fr) 2011-05-24 2011-05-24 Procédé de coulée pour moules permanents
PCT/EP2012/058703 WO2012159898A1 (fr) 2011-05-24 2012-05-11 Procédé de coulée pour moules permanents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11167276A EP2527060A1 (fr) 2011-05-24 2011-05-24 Procédé de coulée pour moules permanents

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EP2527060A1 true EP2527060A1 (fr) 2012-11-28

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WO (1) WO2012159898A1 (fr)

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DE102014205999A1 (de) * 2014-03-31 2015-10-01 Bayerische Motoren Werke Aktiengesellschaft Bearbeitungsvorrichtung zum Bearbeiten eines gegossenen Gussrohteils und Verfahren zum Herstellen eines Gussbauteils
CN109732064A (zh) * 2019-02-26 2019-05-10 南通市众惠模具有限公司 一种用于铝件加工的快速成型加工模具
DE102019106643A1 (de) * 2019-03-15 2020-09-17 Schaufler Tooling GmbH & Co. KG Wassermantelkern
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CN113976857A (zh) * 2021-11-08 2022-01-28 浙江保康轮毂制造有限公司 一种新型快装式铝合金卡巴轮毂模具

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